EP2374529A2 - Reaction assembly with stirring device and at least one baffle and method for drawing a gas, light solid or light fluids into a fluid in a reaction container - Google Patents

Abstract

Reaction arrangement comprises: a cylindrical container (10) with a container interior and an inner wall for receiving liquids, where the inner wall is enameled against corrosion-resistant liquids; an agitator (20) with a rotating shaft and at least one agitating element rotating with the shaft; and at least one baffle (30), which is arranged inside the container, or on or adjacent to the inner wall of the container. The baffle located in an upper area of the container, is extended more towards an axis of the container, than a lower area of the container. Reaction arrangement comprises: a cylindrical container (10) with a container interior and an inner wall for receiving liquids, where the inner wall is enameled against corrosion-resistant liquids; an agitator (20) with a rotating shaft arranged vertically in an axis of the cylindrical container or parallel to it and at least one agitating element rotating with the shaft; and at least one baffle (30), which is arranged inside the container, or on or adjacent to the inner wall of the container. The baffle, which is located in an upper area of the container, is extended more towards the axis of the cylindrical container, than a lower area of the container, and the baffle above the uppermost agitating element of the agitator at least reaching up to a distance on the shaft of the agitator is smaller than the distance of the outermost point of the agitating element of the shaft, or the baffle is extended more over the shaft from the inner wall. An independent claim is also included for collecting gases, light solid particles and/or light liquids in an underlying liquid in the reaction container, comprising providing the reaction container, and generating eccentric thrombus to the surface of the liquid inside the container interior.

Description

The invention relates to a reaction arrangement with a cylindrical container having a container interior and having an inner wall for receiving fluids, wherein the inner wall against the fluids corrosion resistant, in particular enamelled, with a stirrer with a vertical axis or parallel to the axis of the cylindrical Container arranged rotating shaft and at least one shaft rotating with the stirring element with at least one baffle, which is arranged in the container interior, wherein the baffle is arranged on or adjacent to the inner wall of the container

The invention further relates to a method for drawing a gas, light solid or light fluids into a fluid in a reaction vessel.

In such reaction arrangements, fluids, in particular liquids, are mixed in the containers with one another and with added solids. The containers are also referred to as reactors and used in the chemical industry for the production or further processing of chemical products.

Such containers have a wall of metal, which is protected as far as possible against corrosion by the reacting substances and can withstand the mechanical loads, so for example, is pressure-tight.

Usually, a stirrer is provided. It is a rotating shaft with an axis extending usually perpendicular in the container and with sitting on the shaft and the liquids moving and mixing stirring elements.

For example, this describes U.S. Patent 5,549,854 a corresponding container with a centrally located mixer and with a variety of the Walls of the cylindrical container arranged individual baffles, so-called Baffles. The baffles in this design are each adjustable and are positioned by joints, hinges and other elements. Each baffle is embedded in the tank via spigots in the upper floor. This creates a configuration with several independent elements.

The fluid in the interior of the container, which is set in motion by the mixer, is hindered in this movement by the baffles in such a way that a number of eccentric whirlpools are created.

By means of this eccentric vortex it should be possible according to this proposal to draw gas from a region immediately above the liquid surface into the liquid phase. As a result, for example, an oxygen-containing gas such as air for oxidation purposes can be drawn into a liquid.

The baffles are vertically as long as the cylinder is high, so that mechanical problems arise due to the relatively large bumper length and the large number of baffles. Due to the joints and hinges of the large number of adjustable baffles, the entire system is quite complex and sensitive, especially for particularly aggressive and complex fluids. The container with the mixers and baffles also has the disadvantage of being unable to enamel due to its structure. Joints and hinges can not be realized by email technology. This means that its corrosion resistance is limited and it can only be used for certain liquids for mixing. Arrangements that are not suitable for e-mails and can not be used in enamelled apparatus can not meet many requirements that arise in practice.

It is also difficult to implement a suitable arrangement of multiple baffles in a confined space of a reactor, since the baffles may not interact with the mixers.

From the EP 0 983 789 B1 a form suitable for enamelled containers and enamelled stirrers is known. Again, in a cylindrical container, a vertically arranged stirring member is provided, which has in its base adjacent the container bottom projections, which put the liquid in the container interior in motion upon rotation of the stirrer.

Adjacent to the container edge here also a vertical shape of a baffle or a baffle plate or a so-called baffle is provided, which is inserted from above into the container and is formed in a horizontal section approximately C-shaped. This baffle does not move and interrupts the liquid flow forced inside the container by the rotary motion of the agitator. The C-shape results in a particularly effective mixing of the liquid, especially when the concave side of the baffle is facing the flowing liquid.

From the EP 1 585 591 B1 and the US 2006/0163260 A1 as well as the FR 2888132 A1 For example, another form of enamelled reaction vessel is known in which a baffle is vertical in the cylindrical container and connected to the outer surface in a local connection part that is relatively short. Within this local connection part can also be provided a local connection of a cavity in the interior of the baffle with the fluid of a heating or cooling system. This should be in accordance with the EP 1 585 591 B1 In addition to the disturbance of the liquid in the container interior, a heating or cooling of these flowing particles within the container interior away from the container wall can be achieved as well.

In one embodiment of these documents, a modified from the vertical tilted position arrangement of the baffle is already proposed.

From the U.S. Patent 4,127,877 are irregularly shaped, internally hollow baffles are known, which are nestled against the reactor wall, that they can have a common Enamelierungsschicht.

From the US 2007/021977 A1 is a reaction container with baffles known, which additionally have a straightening element in a separate flow area, but otherwise have conventional baffles.

In the US 2004/02403165 A1 Finally, a reaction vessel is proposed, which is equipped with differently perforated and slotted baffles.

The applicant herself has in the DE 20 2008 009 252 U1 also proposed to provide a mounting option for probes in the baffles.

From the WO 2007/039270 A1 a mixing container for liquids is known, which is also equipped with a stirrer having some plates at the bottom to stir the liquid can.

On the container wall of the cylindrical container removable accessories are provided, which may for example also baffles, so again Baffles or the like may be.

The aforementioned enameled stirred tank with stirrers and baffles are also suitable for mixing the liquid in the container and are widely used.

Unlike the devices from the U.S. Patent 5,549,854 however, they are not capable of satisfactorily promoting gas entrainment into the liquid, which gas may be located above the liquid.

However, users require reaction arrangements that can be used to mix even the most demanding and aggressive media of various composition, and it is also of interest if gas and / or foam can be drawn into the liquid from above. It may be moreover, be liquids which have a solid and / or gaseous phase. A mixing of such media would be interesting for the user in a variety of cases, but is not satisfactory possible with conventional reaction arrangements.

The object of the invention is therefore to propose a reaction arrangement which is more resistant to corrosion than that from U.S. Patent 5,549,854 known, but it is also able to collect gas and in a further embodiment as possible also floating solids and / or foam with in the reacting liquid.

Another object of the invention is to propose a method for drawing in a gas, a light solid or a light fluid above a fluid in a reaction arrangement.

This first object is achieved by means of the invention in a generic reaction arrangement in that the baffle extends in the upper region of the container further in the direction of the axis of the cylindrical container, as in the lower region of the container, and that the baffle above the uppermost stirring element of the stirring element reaches at least to a distance to the shaft of the stirring member, which is smaller than the distance of the outermost point of the stirring member of the shaft or that the baffle of the inner wall still protrudes beyond the shaft.

The latter alternative can be achieved by arranging or bending the baffle or parts of the baffle at an angle that guides the baffle past the shaft.

The second object is achieved by means of the invention by a method in which a corresponding reaction arrangement is used, and in which off-center thrombi are produced adjacent to the surface of the fluid in the container interior.

The invention is based on the finding that with inventively embodied forms of baffles and the stirrer in the reaction arrangement, this task is solvable. So you are working with a substantially cylindrical container with at least one lower bottom, with a liquid in the container interior. Inside the container, a rotating stirrer is provided. The stirring element has a vertically arranged shaft and at least one stirring element. In addition, at least one baffle, baffle or flow breaker is provided, which has various properties, which are explained in more detail below.

Unlike in previous concepts, however, a baffle is now used whose width is not constant over the entire axial extent of the cylindrical container. Instead, its width is dimensioned so that it protrudes in the upper area of the container further towards the center of the container, as in the lower area.

This change in width does not have to increase in the form of an oblique line or continuously or continuously from bottom to top, but this can also be done in jumps, preferably even in a form described below.

It is particularly advantageous, however, that the baffle above the topmost stirring element of the stirring element approaches at least to a distance to the shaft of the stirring member, which is smaller than the distance of the outermost point of the stirring element of the shaft. In this way, a particularly large area is created in the zone below the surface of the fluids to be treated, which must not be penetrated by the flow, but must be flowed around. Not only the areas to the left and right of the obstacle are available for this flow, but also the areas below and above the obstacle, which leads to a strong mixing in the vertical direction, especially in the near-surface areas of the fluids in the container interior.

This effect is exacerbated when the upper edge of the baffle has a distance from the surface of the quiescent liquid in the container interior, which is less than the distance of the uppermost stirring element of the agitator of the surface of the quiescent liquid in the container interior, and preferably at about the level of Surface of the dormant liquid lies.

As a result of the overflow and the vertical direction of movement of the fluid particles in this region of the container interior, particles are also drawn directly above the surface of the fluid, for example foam particles and near-surface gas particles from the atmosphere above the fluid.

In principle, it is possible to construct the baffle as a one-piece element and to make it approximately plate-shaped. In this case, one could let the container wall adjacent or adjacent to this edge of the baffle run strictly vertical, while you could let the container interior facing edge stepwise or whole or in sections obliquely.

One of the properties of a particularly preferred embodiment is to construct the baffle of two plate-shaped elements, which exert an interesting effect on the surface of the liquid. One of the two plates largely corresponds in size and arrangement to what has so far completely identified a baffle. This plate-shaped element is adjacent to the inner wall of the container, extending vertically and thus parallel to the axis of the shaft and has an approximately rectangular cross-section. The vertical extension is preferably much larger than the horizontal extent.

However, unlike conventional reaction arrangements, the baffle still has a second plate-shaped element. This is located in its upper area. The second plate-shaped element is preferably fastened to the first plate-shaped element. However, the second plate-shaped element may also be provided separately and separately from the first plate-shaped element and separated from this at the Interior wall of the container attached or attached to the ceiling or the bottom of the container. In extreme cases, the second plate-shaped element may be provided alone in the container interior, ie without the first plate-shaped element. This is not preferred.

The second plate-shaped element also does not move in the first approximation. However, the second element projects further into the interior of the container than the first, and in preferred embodiments, even further than the center of the container.

This second plate-shaped element is preferably also approximately rectangular. If one considers the arrangement of this second plate-shaped element in the container interior with an initially stationary liquid, the second plate-shaped element is preferably completely immersed in the initially stationary liquid.

However, the second plate-shaped element is preferably arranged close to the surface. Particularly preferably, this second plate-shaped element terminates almost flush with the surface of the liquid, as long as the liquid is at rest. With such an arrangement, the effects described below are particularly effective.

As the agitator of the agitator rotates, the second plate-shaped member retards the near-surface flow, forcing it to change direction up and down. The second plate-shaped element is thus overflowed. The overflowing liquid impinges on the liquid flowing between the agitator shaft and the second plate-shaped element and forms a rotating vortex behind the second plate-shaped element. This vortex rotates eccentrically with respect to the axis of the container.

This rotating vortex creates a suction on the gaseous phase located above the liquid surface or on the gaseous substance located there, for example on the ambient air or the other atmosphere which has formed above the liquid in the container or in the container interior or has been generated there. This can also be a targeted there provided gas, such as oxygen.

This vortex extends to the tips of the stirrer blades of an upper stirrer, from where the vortex-entrained gas is dispersed in the liquid. Since the stirrer with the upper stirrer also has an axial conveying effect, registered gas bubbles are distributed throughout the liquid volume. Supporting the distribution of the gas in the entire volume of liquid is the first sheet-like element of the flow breaker. This ensures a largely homogeneous radial distribution of the gas bubbles in the liquid.

This allows the gas bubbles, as intended by the user, to take part in a reaction in the liquid which thereby takes place much more uniformly and, due to the penetration of the gas bubbles into deeper liquid layers, also more rapidly in the entire reacting mixture.

Also, a catalytic effect that may be desired by the user through the gas, can be carried in this way immediately into the deeper layers of the liquid.

The configuration described works with a very simple and easy to understand for the user and only requires a baffle with two effective surfaces, in which numerous functions are automatically integrated.

In the same way as for the gas to be drawn into the liquid, the baffle according to the invention is also suitable for drawing in and homogeneously mixing light solids, ie liquids floating on the liquid, and floating fluids having a lower density than the base liquid. This interference also occurs when solid particles again tend to float. In a sense, there is a stirring in of floating solids.

In this application, it has proven to be particularly useful that the baffle is overflowed by the fluid in order to realize a strong flow shadow behind the component, but on the other hand to prevent the emergence of the floating substances from the baffle.

In addition, it is particularly preferred in this application that a sufficient distance from the wall of the first plate-shaped element from the inner wall of the container is realized in order to avoid damming and blocking of floating solids.

It has also been shown that the baffle according to the invention in the reaction arrangement is also able to draw foam floating on the liquid surface back into the liquid. The mode of action is exactly the same as drawing in floating solids. In practice, however, this process is slower due to the density differences between liquid and foam. In addition, foams often have properties (e.g., sticking to components and the container wall) that make stirring difficult.

The number of baffles or flow breakers in a reaction arrangement is preferably two, which are opposite to each other. This has proved to be particularly practical, according to the results of extensive experiments, for the majority of applications. On the one hand, this results in a relatively symmetrical distribution of the vortices in the entire container interior, on the other hand, the ratio of cost to benefit in two baffles after initial tests is particularly favorable.

In principle, however, it is also possible to use the advantages of the invention with reaction arrangements which have a different number of baffles. Thus, it may be sufficient in particular for very small reaction arrangements to provide a baffle, but there are also more than two, in particular three to six baffles conceivable.

These baffles or flow breaker would then be arranged in each case at equal angular intervals on the inner wall of the container.

The number of levels with stirring elements of the stirring element should preferably be two, but may also be greater.

By providing two stirrer levels, a rotational flow similar to conventional reaction arrangements can be established in the lower portion of the cylindrical container, while an upper stirrer level can be placed much closer under the second plate-shaped elements of the flow breakers and rotate therewith, so that the interactions of these second plate-shaped elements is greatly reinforced with the stirring elements.

It follows that the width of the second plate-shaped element is greater than that of the first plate-shaped element of the respective baffle. Width is to be understood in the case of a rectangular second plate element, the dimension pointing in the direction of the container interior.

With respect to the vertical dimensions, on the other hand, that of the first plate-shaped element is greater than or equal to that of the second plate-shaped element. Preferably, this vertical dimension of the first plate-shaped element will be significantly greater than that of the second plate-shaped element.

Comparing the width of the second plate-shaped member with the inner diameter of the cylindrical container, the width is between 0.1 times and 0.7 times this diameter, and is preferably in the range of 0.5 times this diameter.

The vertical extent of the second sheet-like element compared to the height of the cylindrical container from the bottom to the liquid level is preferably between 0.1 times and 0.5 times this height, preferably in the range of 0.1 times to 0.2 times this height. This height can also be referred to as level.

If one considers the distance that the upper edge of the second plate-shaped element of the baffle (or baffles) from the surface of the liquid in the stationary state, so this distance is particularly preferably 0, so that the surface is located approximately where the Liquid surface is in a dormant state. It is also conceivable, however, to arrange the second plate-shaped element deeper in the liquid or to allow it to protrude from the liquid. It is preferred, however, if not more than ¾ of the vertical extension of the second plate-shaped element protrude out of the liquid or if the distance of the horizontal upper edge below the liquid surface is not more than ¾ of the vertical extension of the second plate-shaped element.

The distance of the horizontal lower edge of the second plate-shaped member from the uppermost of the stirring elements of the stirring member is between about 0.05 times the inner diameter of the cylindrical container and 0.5 times this diameter. Particularly preferably, this distance is on the order of the vertical extent of the second plate-shaped element.

Modifications of the operation of the baffles are also possible by a specific choice of angles, which includes the second plate-shaped element with the other elements.

Where the second plate-shaped element is preferably not arranged in the same vertical plane as the first element inside the container, but the upper edges of the two elements form an angle with each other. If the upper edges are not horizontal, or are not in the same horizontal plane, which is possible in a number of embodiments, a projection of these two upper edges in a common horizontal plane is considered here. In this close the two Upper edges an angle α, which could be referred to as a folding angle. This angle .alpha. Is preferably between -60.degree. And + 60.degree. And preferably at + 45.degree. With a rotating stirring element in a clockwise direction.

The second plate-shaped element may further include an angle β with a vertical plane. The angle β is then a kind of tilt angle with which the second plate-shaped element is tilted with respect to the vertical plane.

This angle β is then preferably between -55 ° and + 55 ° and particularly preferably of the order of 0 °.

The width in the horizontal direction of the first plate-shaped member, which has approximately the shape of a conventional baffle, is in the range between 0 and half of the inner diameter of the cylindrical container. In the case of a width of 0, the first plate-shaped element is omitted and only the second plate-shaped element is provided. Preferably, therefore, a width of more than 0 is provided.

A vertical extent is greater than that of the second plate-shaped element but less than or equal to the height of the water level of the quiescent liquid above the container bottom minus the vertical extent of the second plate-shaped element.

The vertical extent is therefore preferably between about 0.1 times and 0.9 times the distance of the liquid surface of the quiescent liquid above the container bottom.

The distance of the first plate-shaped member from the inner wall of the container is between 0 and 0.2 times the inner diameter of the container, preferably about 0.1 times this inner diameter. The stirring member has an outer diameter which is ≥ 0.2 times the inner diameter of the container and ≦ 0.8 times this inner diameter.

At the same time, the outer diameter of the stirring element preferably corresponds approximately to twice a sum which consists of the distance between the first plate element and the inner wall of the container, the width of the first plate-shaped element in the horizontal direction and half the width of the second plate-shaped element. This means that the outer diameter reaches approximately to the middle of the surface of the second plate-shaped element.

It is particularly preferred if various parameters of the particular second plate-shaped element of the baffle or the respective baffles are variable.

This applies in particular to the angles α and / or β.

It is also preferably provided when the baffle as a whole or the second plate-shaped element is adjustable in its vertical height during operation relative to the liquid surface.

It is particularly preferred that the baffle, in particular its first plate-shaped element, is equipped as a probe carrier and carries a probe at its lower end. In particular, it may be a probe for measuring the temperature of the liquid.

In a preferred embodiment it is provided that either the first plate-shaped element or the second plate-shaped element or both plate-shaped elements can be heated and / or cooled. This can preferably be provided by the fact that the components are provided in their inner with a cavity and can be flowed through by a heating and / or cooling medium.

It is particularly preferred if all surfaces of the baffles and also other liquid-contacting surfaces of the container are enameled or coated.

In a preferred embodiment it is further provided that inside the second plate-shaped element along its outer surface an inner tube for use as a dip tube is integrated.

The two plate-shaped elements can be permanently or detachably connected to each other.

In one embodiment, it is provided to construct the second plate-shaped element not of metal, but of a soft-elastic material. It can then be provided that it automatically deforms within certain limits due to the attacking flow forces.

The stirrer can also be further adapted. Thus, in the case of reaction arrangements with a ratio of height to inner diameter of the cylindrical container of more than 1, it is preferred to always use two stirrer levels. The stirring elements in the lower level preferably work as a substantially radially acting stirring element. By contrast, the upper stirring element is preferably a radially / axially conveying stirring element.

In some embodiments, it has proven to be advantageous for certain applications when the second plate-shaped element is provided with recesses. The element can thus be virtually perforated, but the recesses can also extend from the outer edges inwards, so that the plate-shaped element, for example, looks like a fork with prongs.

It is also conceivable to construct the second plate-shaped element from a partially permeable material. This is about to think of a network or a grid.

It may alternatively or additionally be provided that the second plate-shaped element is profiled, in particular is corrugated or has rounded corners.

It is particularly preferred if the second plate-shaped element is bent, and that the bending takes place about a substantially vertical bending axis.

In particular, it is preferred that the two legs of the curved second plate-shaped element have a different length, wherein the longitudinal dimensions are measured in a plane perpendicular to the shaft, and wherein the ratios of the lengths are between 1.5: 1 and 3: 1.

With such bent second plate-shaped elements in baffles, particularly interesting additional effects can be achieved which favor the formation of thrombi which form eccentrically to the shaft of the agitator and form a strong downward flow for gases, solids, foams or lighter supplied fluids that are above located in the reaction vessel fluid.

Basically, it is the case that the solution according to the invention lives off when the second plate-shaped element is very wide. In particular, when it is up to the middle of the container or up to the shaft of the stirrer or even beyond and accordingly also pivoted at an angle in order not to hit the stirrer shaft, advantageous concepts arise.

This has been reluctant to those skilled in this sector, as this intervention in the actual narrower area of the stirrer takes place and it also seems absurd at first, to design a baffle that extends beyond the center of a container.

It has also proven to be very favorable if a clear distance is maintained between the second plate-shaped element and the container wall.

There are also embodiments which function without the first plate-shaped elements and have only the second plate-shaped elements.

Further aspects, features and advantages of the invention are illustrated and discussed in the subclaims and in the description of the figures.

Figur 1

eine perspektivische, teilweise weggebrochene schematische Ansicht auf eine Ausführungsform der Erfindung;

Figur 2

eine Vorderansicht der Figur 1;

Figur 3

eine perspektivische Darstellung eines Details der Ausführungsform aus den Figuren 1 und 2;

Figur 4

eine andere Ansicht des Details aus Figur 3;

Figur 5

eine dritte Ansicht des Details aus Figur 3 und 4;

Figur 6

eine schematische Darstellung eines weiteren Details der Ausführungsform aus den Figuren 1 und 2;

Figur 7

eine perspektivische, teilweise weggebrochene schematische Ansicht auf eine andere Ausführungsform der Erfindung, ähnlich zur Figur 1;

Figur 8

eine Draufsicht auf die Ausführungsform aus Figur 7;

Figur 9

eine perspektivische Ansicht eines Details der Ausführungsform aus den Figuren 7 und 8;

Figur 10

eine Seitenansicht des Details aus Figur 9;

Figur 11

eine Draufsicht auf das Detail aus den Ausführungsformen in den Figuren 9 und 10;

Figur 12

eine Seitenansicht des Details senkrecht zur Figur 10;

Figur 13

eine vereinfachte Draufsicht der Ausführungsform aus der Figur 8 mit zusätzlichen Hinweisen; und

Figur 14

eine Darstellung ähnlich der Figur 13 mit einem anderen Hinweis.

In the following an embodiment of the invention will be explained in more detail with reference to the drawing. Show it:

FIG. 1

a perspective, partially broken away schematic view of an embodiment of the invention;

FIG. 2

a front view of the FIG. 1 ;

FIG. 3

a perspective view of a detail of the embodiment of the FIGS. 1 and 2 ;

FIG. 4

another view of the detail FIG. 3 ;

FIG. 5

a third view of the detail FIG. 3 and 4 ;

FIG. 6

a schematic representation of a further detail of the embodiment of the FIGS. 1 and 2 ;

FIG. 7

a perspective, partially broken away schematic view of another embodiment of the invention, similar to FIG. 1 ;

FIG. 8

a plan view of the embodiment FIG. 7 ;

FIG. 9

a perspective view of a detail of the embodiment of the FIGS. 7 and 8th ;

FIG. 10

a side view of the detail FIG. 9 ;

FIG. 11

a plan view of the detail of the embodiments in the FIGS. 9 and 10 ;

FIG. 12

a side view of the detail perpendicular to FIG. 10 ;

FIG. 13

a simplified plan view of the embodiment of the FIG. 8 with additional information; and

FIG. 14

a representation similar to the FIG. 13 with another hint.

In the FIG. 1 One sees a perspective, obliquely taken from above insight into a container 10 of a reaction arrangement. The container 10 is partially cut here; the area of the wall of the container 10 directed towards the viewer and to the left front is omitted.

Thus, inside the container 11, this container interior 11 is filled with one or more fluids to be mixed and / or reacted in the practical use of the reaction assembly. In the fluids, there may also be solid particles which are to play a role in the reaction, for example, or which are simply used finely distributed as catalyst or should even become part of the stirred mixture.

Above the fluids, in particular therefore the liquid in the lower region of the container interior 11, there may also be foam or a solid which is lighter than the liquid in the lower region of the region of the container interior 11. A gas, for example air, may also be located above the Liquid within the container 10 are located.

This liquid is in the FIG. 1 omitted. Instead, one looks at a container inner wall 12. Since the container 10 itself is cylindrical and in the illustrated embodiment has a vertical cylinder axis, the container inner wall 12 is cylindrical. It is protected against corrosion and especially enamelled. This expands the possibilities for use with certain fluids in the container interior 11.

In order to assist the fluids in the container interior 11 in their reactions and / or bring about as uniform as possible mixing of different fluids, solids, gases or foam particles in the container interior 11, this liquid is moved along with further components in the container interior 11. The stirring member 20 has a shaft 21 which can be seen vertically in the cylinder axis of the container 10. This shaft 21 is rotated by a motor (not shown).

On the shaft 21 there is a first stirring element 22 in the vicinity of the bottom of the wall of the container 10. This stirring element 22 consists in the illustrated embodiment of four paddle-like elements, ie plate-like objects which are at an angular distance of 90 ° in a horizontal plane perpendicular to turn vertical shaft with this shaft. Each of these paddles of the stirring element 22 stands in turn at an angle of approximately 45 ° to the horizontal.

By this arrangement, the paddle of the stirring element 22, a rotational movement of the fluids in the container interior 11 can be generated around the rotating shaft 21 around.

In order to support this rotational movement, a similarly constructed further stirring element 23 is also fastened approximately at half the height of the container 10 to the same shaft 21 of the stirring element 20. The two stirring elements 22 and 23 thus rotate synchronously and tend to result in a uniform movement of the fluids in the container interior 11 about the rotating shaft 21 within the container inner wall 12.

A merely around the shaft 21 rotating liquid mass in the container interior 11 would be mixed only unsatisfactory. Contribute to a better mixing baffles 30 at. Shown are two baffles 30 which are diametrically opposed within the container interior 11 and do not move. They are (not shown), for example, attached to the container inner wall 12 or inserted from above through the not shown container lid or the container roof and attached thereto.

The baffles 30 serve to prevent the rotating liquid from moving freely and to create mixing vortices and currents in the container interior 11.

In the presentation of the FIG. 1 it can already be seen that the embodiments according to the invention of baffles 30 are not just like conventional flat or curved, vertically oriented surface elements, which are therefore usually also referred to as baffles or impact plates. Instead, each baffle 30 has two plate-like or plate-shaped elements 31, 32.

The first plate-shaped element 31 of each baffle 30 is vertical and thus parallel to the inner wall 12 of the container 10 adjacent to this inner wall 12, but has a small distance to this. The planar extension of the element takes place approximately in a vertical plane which passes through the shaft 21. This first plate-shaped vertical element 31 of the baffle 30 extends over most of the vertical extent of the cylindrical container 10th

The second plate-shaped member 32 of each baffle 30 is formed significantly smaller than the first plate-shaped member 31 and is fixed to the first plate-shaped vertically extending member 31 in the upper portion of the container interior 11 of the container 10.

This second plate-shaped element 32 is inclined to the vertical, spanned by the two first plate-shaped elements 31 and the shaft 21 plane. Roughly, the surface of the plate-shaped member 32 is tilted about a horizontal line passing through the first plate-shaped members 31 and the second plate-shaped members 32 by an angle on the order of about 30 °.

The plate-shaped elements 32 protrude into the container interior 11 in the direction of the shaft 21 and overlap - apart from their differently placed vertical arrangement - with the area which is swept by the paddles of the two stirring elements 22, 23. They are above, however both stirring elements 22, 23, so that a touch and interaction is excluded in this respect.

The second plate-shaped elements 32 of the baffles 30 do not move to a first approximation during the stirring process.

It can be seen in the FIG. 1 at the lower end of the first two plate-shaped vertical elements 31 of the two baffles 30, a probe 33. These probes 33 may be one or more of a variety of measuring instruments or detectors, which serve for example for measuring the temperature of the probe 33 flowing around the fluid ,

If the agitator rotates with the stirring element 20 and the two stirring elements 22 and 23 about the shaft 21, the liquid in the container interior 11 is set in motion and is no longer at rest. However, the liquid does not become a pure rotational movement about the shaft 21, but is forced by the elements of the baffle 30 to a different movement.

Looking at the resulting flow pattern behind the second plate-shaped element 32, it can be seen that there the liquid adjacent to the liquid surface flows over the horizontally extending upper edge of the plate-shaped element 32. Behind the plate-shaped element 32 forms a vortex-afflicted zone. The result is a bubble line, which extends from there in the direction of the tips of the upper stirring element 23.

In the FIG. 2 to see a view of the embodiment of the FIG. 1 , seen directly from the front. This means that you can see the container interior 11 of the container 10 while looking at the container inner wall 12. The container interior 11 is filled with a liquid which is in this FIG. 2 is indicated by a liquid level 15 at rest liquid. A quiescent fluid is in the container 10 when it is not in operation. This is the case when the shaft 21 of the stirring member 20 with the Stirring elements 22 and 23 does not rotate and the liquid with the liquid level 15 is without movement.

Compared to the FIG. 1 It is easy to see what the stirring elements 22 and 23 look like when viewed directly from the front. While the stirring elements 22 and 23 extend outwardly from the vertically oriented shaft in the central axis of the cylinder, but do not touch the baffles 30 arranged there in the form of the first plate-shaped elements 31 arranged there, they also extend from the baffles 30 with theirs vertically over the almost entire cylinder length parallel to the shaft 21 extending first flat vertical elements 31 from the second flat inclined elements 32 inward. These flatly arranged elements 32 project obliquely into the container interior 11. It can be seen that this extension extends geometrically beyond the container center and thus by more than the container radius. In the FIG. 2 can be seen from the fact that the second planar, obliquely arranged element 32, which protrudes from the left to be recognized first flat vertical element 31 of the baffle 30 to the right, is arranged in front of the shaft 21 and this hidden from the viewer. In the same form protrudes from the right, the second flat, obliquely arranged plate-shaped elements 32 of the right to see baffle 30 from left and extends behind the shaft 21 even beyond this.

However, the elements 31 and 32 do not move in contrast to the stirring elements 22 and 23. Although the shaft 21 rotates about its own axis, but remains in place, there is no movement of these elements, which could lead to mutual damage.

Since the stirring elements 22 and 23 are located below the elements 32, there is no mutual interference here.

In the FIG. 3 can be drawn out even larger out a baffle 30 with a first plate-shaped vertical element 31 and a second obliquely arranged plate-shaped element 32. It can be seen that two angles α and β are provided, which describe the relative arrangement of the two plate-shaped elements 31 and 32 to one another in more detail.

To further clarify these angles, which are already drawn in this three - dimensional representation, is in the FIG. 4 a plan view of the plate-shaped vertical elements 31 and 32 of the baffle 30 indicated as they are arranged in the container 10 seen from above. It can therefore be seen on the flat upper edge of the first plate-shaped vertical member 31 which is adjacent to the inner wall 12 of the container 10 is arranged.

In addition to this first element 31, the second obliquely arranged plate-shaped element 32 can also be seen from above. The angle α is the angle which the upper edge of the second plate-shaped element 32 occupies with the upper edge of the first plate-shaped element 31 in this plan view. These two upper edges may lie in the same horizontal plane, but this is not a mandatory requirement and may be provided differently in different embodiments.

If this angle α is greater than 0, this means that the virtual extension of the upper edge of the element 32 does not intersect the shaft 21 of the stirring element 20.

In the FIG. 5 you can see the details from the Figures 3 and 4 , seen from the direction X in the FIG. 4 , This is the viewing direction that a viewer has from the position of the shaft 21 in the horizontal direction on the inside of the baffle 30.

As a result, he sees in the background the vertical edge of the first element 31 facing him.

In front of the element 31 is the second element 32. Here he does not see directly on an edge facing him, because the second element 32 is, as in the FIG. 4 indicated by the angle α pivoted out of his line of sight.

In addition to this pivoting about the angle α from its line of sight, the second element 32 is also pivoted out of a vertical plane by an angle β, which it occupies with the vertical.

The second plate-shaped element is thus obliquely in the container interior 11 in this illustrated embodiment, namely obliquely both to the vertical direction and obliquely to the shaft 21st

This is also provided in this embodiment, but other embodiments may have other arrangements here as well.

Down at the baffle 30 extends from the first vertical plate-shaped element 31 out a probe 33rd

This is again clarified in the FIG. 6 , Here you can see the lower right corner of the embodiment of the FIG. 1 increased. In this corner projects just before the container inner wall 12, a probe 33 from the first flat plate-shaped element 31 of the baffle 30 down.

To the left of this one can still recognize one of the paddles of the lower stirring element 22.

• Breite (31) < Breite (32)
• Höhe (31) ≥ Höhe (32)

• 0,1 x D ≤ Breite (32) ≤ 0,7 x D, Breite (32) vorzugsweise 0,5 x D
• 0,1 x H ≤ Höhe (32) ≤ 0,5 x H, vorzugsweise 0,1xH≤Höhe (32)≤0,2 x H
• -0,75 x Höhe (32) ≤ u ≤ 0,75 x Höhe (32); u vorzugsweise = 0 bei ruhender Flüssigkeit
• 0,05 x D ≤ a ≤ 0,5 x D; vorzugsweise a = Höhe (32)
• -60° ≤ α ≤ 60°, vorzugsweise α = 45° bei im Uhrzeigersinn drehendem Rührer
• -45° ≤ β ≤ 45°, vorzugsweise β = 0°

• 0 x D ≤ Breite (31) ≤ 0,5 x D
• Höhe (32) ≤ Höhe (31)≤ (H-Höhe (32))
• 0,1xH≤Höhe(31)≤0,9xH
• 0 x D ≤ k ≤ 0,2 x D, vorzugsweise k=0,1 x D

• 0,2xD≤d≤0,8xD
• d=2 x (k + Breite (31) + Breite (32)), d.h. Mitte des Elements (32)

In summary, a preferred embodiment of the invention is characterized by the following geometric relationships:

• Width (31) <Width (32)
• Height (31) ≥ height (32)

• 0.1 x D ≤ width (32) ≤ 0.7 x D, width (32), preferably 0.5 x D
• 0.1 x H ≤ height (32) ≤ 0.5 x H, preferably 0.1 x H≤height (32) ≤0.2 x H
• -0.75 x height (32) ≤ u ≤ 0.75 x height (32); u preferably = 0 when the liquid is at rest
• 0.05 x D ≤ a ≤ 0.5 x D; preferably a = height (32)
• -60 ° ≤ α ≤ 60 °, preferably α = 45 ° in a clockwise rotating stirrer
• -45 ° ≤ β ≤ 45 °, preferably β = 0 °

• 0 x D ≤ width (31) ≤ 0.5 x D
• Height (32) ≤ height (31) ≤ (H height (32))
• 0,1xH≤Höhe (31) ≤0,9xH
• 0xD≤k≤0.2xD, preferably k = 0,1xD

• 0,2xD≤d≤0,8xD
• d = 2 x (k + width (31) + width (32)), ie center of the element (32)

The corresponding abbreviations are given in the list of reference numerals. Moreover, "width (31)" means the width of the plate-shaped element (31) and "width (32)" means the width of the plate-shaped element (32), similar in terms of height (31) and height (32). The last-mentioned equation applies to embodiments which have at least two opposing baffles 30.

In the FIG. 7 you see a representation similar to FIG. 1 , and here to another embodiment of the invention. Here, too, one sees the container 10 with the container interior 11 and the preferably enamelled container inner wall 12.

In the substantially cylindrical container 10 is a shaft 21 with a first stirring element 22 attached thereto in the vicinity of the bottom of the wall of the container 10 and a second stirring element 23 on the same shaft 21 a piece above it. Both stirring elements 22 and 23 in turn consist of several paddle-shaped elements.

In this embodiment, baffles 30 are provided, of which one can easily see a baffle, while the other is partially hidden in the right half of the wall of the container 10.

Each baffle 30 has a first plate-shaped element 31, which has a relatively large vertical extent, and a second plate-shaped element 32, which extends only in the upper part of the container 10.

Unlike in the embodiment of the FIGS. 1 to 6 the second plate-shaped element 32 of the baffle 30 is bent. It can be seen that the second, largely concealed baffle has a similar to the shaft 21 symmetrically arranged to the first baffles second plate-shaped element 32.

These curved second plate-shaped elements 32 still allow additional use of certain effects. These occur in particular when, as in the FIG. 7 represented two substantially oppositely disposed baffles 30 are provided, since then a particularly favorable flow pattern is formed.

It is assumed that here the stirrer rotates clockwise around the shaft 21. As a result, a rotational flow is generated in the container 10, which is aligned substantially tangentially to the inner wall 12 of the container 10.

If there were no internals, then a thromb would form in the fluid inside the container 11, which is aligned concentrically with the shaft 21.

An entry of gas from the area above the fluid or the liquid then takes place only to a small extent and at lower speeds, such an entry of gas completely eliminated. The in the FIG. 7 illustrated in the container 10 arranged baffles 30, in particular the second plate-shaped and bent in this embodiment Elements 32, now influence the flow of the fluid adjacent to the surface, such that a thrombus can form inside the flow-remote, concave region of the curved second plate-shaped element 32 of the baffle 30. This thrombus is now off-center. Its center of rotation is approximately in the illustration in the FIG. 8 in the range of bb / 2. Thus, this center of rotation is eccentric to the shaft 21 of the stirrer.

The illustrated and in plan view in the FIG. 8 Particularly well recognizable shape of the second plate-shaped element 32 of the baffle 30 improves the formation of the rotational flow behind this plate-shaped element and thus provides a relation to a straight relationship flat plate significantly enhanced and improved training of the thrombus mentioned. This thrombidation results in a downward flow desired to draw the gas into the fluid. This downward flow can be well observed in thrombi in daily life with swirls.

In conjunction with the respective opposing second plate-shaped curved element 32 of the other baffle 30, this thrombogenic effect is further enhanced and downward rotational flows emerge behind each of the two curved second plate-shaped elements of the baffles 30.

In experiments, it has been confirmed that the exact shape of the second plate-shaped elements of baffles has a significant influence on the formation of the thrombi mentioned and that this influence, for example, on the number of revolutions of the stirrer, which is required to a meaningful rotating downward flow behind the to produce plate-shaped second elements.

• Die Abmessungen bb:ba sollten sich in etwa wie 2:1 verhalten
• Der Radius br sollte zwischen 0,3 und 0,7 x bb sein, im besten Fall sollte br etwa 0,5 x bb betragen
• Der Wandabstand sollte in etwa 0,1 x D (D=Behälterdurchmesser) betragen
• Der Anstellwinkel bs sollte zwischen 0 und 30° betragen, bevorzugt sind Werte von 0 bis 10°
• Der Öffnungswinkel bp sollte zwischen 60 und 120° sein, bevorzugt um die 90°.

As particularly favorable and suitable values it turned out:

• The dimensions bb: ba should behave like 2: 1
• The radius br should be between 0.3 and 0.7 x bb, in the best case br should be about 0.5 x bb
• The wall distance should be about 0.1 x D (D = container diameter)
• The angle of attack bs should be between 0 and 30 °, preferably values of 0 to 10 °
• The opening angle bp should be between 60 and 120 °, preferably around 90 °.

The symmetrical arrangement of the two plate-shaped curved elements 32 of the two baffles 30 has proved to be very valuable.

In the FIGS. 9 to 12 is separately each a baffle 30 (ie without container 10 and stirrer, etc.) shown how it is from different viewing directions with its first, vertically extending plate-shaped member 31 and this is preferably angled and bent formed second plate-shaped element 32.

In the in FIG. 13 It can now be seen how expedient the arrangement should be in a particularly preferred embodiment. In this case, the second plate-shaped curved elements 32 are arranged so that the outer edge of the bent-away end of this element 32 is arranged tangentially or nearly tangentially to the outer edge of the shaft 21 of the stirrer.

In the FIG. 13 For this purpose, an arrow 35 is located, which indicates this position.

As has been further published in the tests, there are also applications in which the baffles 30 have only the second plate-shaped element 32 and in which the first plate-shaped element 31 can be dispensed with, or in other words, in which the width of this first plate-shaped element is zero , This is the case in Rühraufgaben in which the surface effect is crucial and other stirring effects within the container 10 are not or hardly relevant. This is the case, for example, with pure fumigation tasks, as well as when it comes exclusively to the incorporation of light, floating solids.

It is also interesting to choose a particularly suitable introduction point for media in order to be able to optimally stir it into a fluid. This is in the FIG. 14 emphasized.

Often it happens that in container 10, in which a container contents is in the container interior 11, which is stirred, additional media are introduced in solid or liquid form to be mixed with the container contents.

In these tasks, it is important that the media introduced are mixed as quickly as possible and as intensively as possible with the already existing container contents.

By choosing a particularly suitable introduction point for the additional media on the liquid surface, the mixing time can be significantly influenced. It has been found in connection with the inventively provided and trained baffles 30 with their excellent surface effect that a particularly suitable point of introduction is approximately at bb / 2, that is approximately in the middle of the width of the second curved plate-shaped elements 32. At the same time this point should the connecting line between the axis of rotation of the shaft 21 of the stirrer and the outer surface of the first plate-shaped element 31 on the side facing away from the flow, so the concave side of the second plate-shaped element 32 lie. This corresponds approximately to D / 4 of the container 10, so a quarter diameter.

This is indicated by an arrow 36 in the FIG. 14 emphasized again.

LIST OF REFERENCE NUMBERS

10

container

11

tank interior

12

Container inner wall

15

Liquid level inside the container 11 when the liquid is at rest

20

stirrer

21

wave

22

Stirring element, also lower stirring element

23

another (upper) stirring element

30

baffles

31

first plate-shaped, vertical element of the baffle 30th

32

second plate-shaped, obliquely arranged element of the baffle 30th

33

probe

35

Arrow to the position of the outer edge

36

Arrow to the task position

α

Angle between element 31 and element 32

β

Angle between vertical longitudinal edge of element 31 and oblique edge of element 32

D

Inner diameter of the container 11th

H

Height of the container 11 from the bottom surface to the liquid level 15th

a

Distance of the lower edge of the plate-shaped element 32 from the upper edge of the upper stirring element 23rd

d

Outer diameter of the stirring element 23rd

k

Distance of the first plate-shaped element 31 from the inner wall 12 of the container 10th

u

Distance of the upper edge of the element 32 from the liquid level 15th

Claims (27)

reaction arrangement
with a cylindrical container (10) with a container interior (11) and with an inner wall (12) for receiving fluids,
wherein the inner wall against the fluids corrosion resistant, in particular enamelled, is;
a stirrer (20) having a rotating shaft (21) arranged vertically in the axis of the cylindrical container (10) or parallel thereto and at least one stirring element (22, 23) rotating with the shaft (21);
with at least one baffle (30) which is arranged in the container interior (11);
wherein the baffle (30) is disposed on or adjacent to the inner wall (12) of the container (10);
characterized,
in that the baffle (30) extends further in the upper region of the container (10) in the direction of the axis of the cylindrical container (10) than in the lower region of the container (10), and
that the baffle (30) above the uppermost stirring element (23) of the stirring element (20) reaches at least a distance to the shaft (21) of the stirring element (20), which is smaller than the distance of the outermost point of the stirring element (23) from the shaft (21), or that the baffle (30) from the inner wall (12) still protrudes beyond the shaft (21). Reaction arrangement according to claim 1,
characterized,
in that the upper edge of the baffle (30) is at a distance from the surface of the quiescent liquid in the container interior (11) which is smaller than the distance of the uppermost stirring element (23) of the stirring element (20) from the surface of the quiescent liquid in the container interior (11 ), and preferably lies approximately at the level of the surface (15) of the quiescent liquid. Reaction arrangement according to claim 1 or 2,
characterized,
in that the width of the baffle (30) in the region above the uppermost stirring element (23) of the stirring element (20) is at least 0.1 times the inner diameter of the cylindrical container (10), preferably more than 0.4 times this inner diameter , Reaction arrangement according to one of the preceding claims,
characterized,
that the number of baffles (30) is two, and
that the two baffles (30) are diametrically opposed in the container interior. Reaction arrangement according to one of the preceding claims,
characterized,
that the baffles (30) having a first plate-shaped member (31) and a second plate-shaped element (32),
that the first plate-shaped element (31) of the baffle (30) adjacent to the inner wall (12) of the container (10) and approximately perpendicular to the inner wall (12) of the container (10),
in that the second plate-shaped element (32) extends further in the direction of the container interior (11) than the first plate-shaped element (31),
that the width of the second plate-shaped element (32) is greater than the width of the first plate-shaped element (31), and
d ass the second plate-shaped element (32) above the uppermost to the shaft (21) rotating the stirrer (22, 23) is arranged. Reaction arrangement according to claim 5,
characterized,
that the stirring element (20) is equipped with stirring elements (22, 23) in two superimposed stirrer levels, and
that both stirrer levels are provided below the second plate-shaped elements (32) of the baffles. Reaction arrangement according to claim 5 or 6,
characterized,
that the second plate-shaped element (32) above the uppermost stirring member (23) of the stirring element (20) at least up to a distance to the shaft (21) of the stirring element (20) zoom range, which is smaller than the distance of the outermost point of the stirrer ( 23) from the shaft (21). Reaction arrangement according to one of claims 5 to 7,
characterized,
in that the first and the second plate-shaped elements (31) are arranged at a distance from the wall (12) of the container (10). Reaction arrangement according to one of claims 5 to 8,
characterized,
in that the upper edge of the second plate-shaped elements (32) is at a distance from the surface of the static liquid in the container interior (11) which is less than ¾ of the vertical extent of the plate-shaped element (32) above or below the surface (15), and preferred is approximately at the height of the surface (15) of the liquid at rest. Reaction arrangement according to one of claims 5 to 9,
characterized,
in that the width of the second plate-shaped element (32) is between 0.1 and 0.7 times the inner diameter of the cylindrical container (10), preferably 0.5 times this inner diameter. Reaction arrangement according to one of claims 5 to 10,
characterized,
in that the vertical extent of the second plate-shaped element (32) is between 0.1 and 0.5 times the filling height of the cylindrical container (10), preferably 0.15 times to 0.2 times this filling height , Reaction arrangement according to one of claims 5 to 11,
characterized,
in that the distance of the horizontal lower edge of the second plate-shaped element (32) from the uppermost of the stirring elements (23) of the stirring element (20) is between 0.05 and 0.5 times the inner diameter of the cylindrical container (10) , preferably the dimension of the vertical extent of the second plate-shaped element (32) is. Reaction arrangement according to one of claims 5 to 12,
characterized,
that the angle enclosed by the top edge of the second plate-shaped member (32) with the upper edge of the first plate-shaped member (31) angle (α), optionally viewed in a projection in a common horizontal plane between -60 ° and + 60 ° , preferably at 45 ° with clockwise rotating stirrer (20). Reaction arrangement according to one of claims 5 to 13,
characterized,
that the angle between the second plate-shaped element (32) with a vertically extending straight line, in particular a longitudinal edge of the first plate-shaped member (31) (β angle) is between -55 ° and + 55 °, preferably at 0 °. Reaction arrangement according to one of claims 5 to 14,
characterized,
that the width of the first plate-shaped element (31) in the horizontal direction is equal to or less than half the inner diameter of the cylindrical container (10), or that no first plate-shaped element (31) is provided. Reaction arrangement according to one of claims 5 to 15,
characterized,
in that the vertical extent of the first plate-shaped element (31) is greater than that of the second plate-shaped element (32), but less than or equal to the level of the liquid level (15) when the liquid is at rest, preferably between approximately 0.1 times and 0 9 times the distance of the liquid surface (15) of the quiescent liquid above the bottom of the container (10). Reaction arrangement according to one of claims 5 to 16,
characterized,
that the outer diameter of the stirring member (20) with its stirring elements (22, 23) ≥ 0.2 times the inner diameter of the container (10) and ≤ 0.8 times the inner diameter of the container (10). Reaction arrangement according to one of claims 5 to 17,
characterized,
that the second plate-shaped element in its vertical height and / or in its angle α and / or in its angle β and / or in its distance from the first plate-shaped element (31) is adjustable or tilted or inclined. Reaction arrangement according to one of the preceding claims,
characterized,
in that the baffle (30) is designed as a carrier for a probe (33), preferably with an arrangement of the probe (33) at the lower end of the first plate-shaped element (31). Reaction arrangement according to one of the preceding claims,
characterized,
in that the baffle (30), in particular the first plate-shaped element (31) and / or the second plate-shaped element (32), can be heated and / or cooled. Reaction arrangement according to one of the preceding claims,
characterized,
that the baffle (30), in particular the second plate-shaped element (32), consists of a soft elastic material which is deformable automatically by attacking flow forces within certain limits, in particular
that it consists of an elastomeric material whose Shore hardness is at least 40 Shore A and 95 Shore D. Reaction arrangement according to one of the preceding claims,
characterized,
that the baffle (30), in particular the second plate-shaped element (32) is understood to be recesses, in particular perforated or constructed as a partially permeable material in the form of a network or grid or formed from outside to inside recesses in the form of a fork with prongs , Reaction arrangement according to one of the preceding claims,
characterized,
that the baffle (30), in particular the second plate-shaped element (32), is profiled, in particular corrugated or has rounded corners. Reaction arrangement according to one of the preceding claims,
characterized,
in that the baffle (30) together with its possible plate-shaped elements (31, 32) is enamelled. Reaction arrangement according to one of the preceding claims,
characterized,
that the second plate-shaped element (32) is bent, and
that the deflection takes place about a substantially vertical axis of bending. Reaction arrangement according to claim 25,
characterized,
that the two legs of the bent second plate-shaped element (32) have a different length, wherein the longitudinal dimensions are measured in a plane perpendicular to the shaft 21, and the ratios of the lengths of between 1.5: 1 and 3: 1. Process for drawing in gases, light solid particles and / or light fluids in a reaction vessel into an underlying fluid,
in which a reaction vessel according to any one of the preceding claims is used, and
in which off-center thrombi are produced adjacent to the surface of the fluid in the container interior (11).

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