CN104174262B - Internal-external water circulation system and technique for flue gas desulfurization - Google Patents
Internal-external water circulation system and technique for flue gas desulfurization Download PDFInfo
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- CN104174262B CN104174262B CN201410402591.5A CN201410402591A CN104174262B CN 104174262 B CN104174262 B CN 104174262B CN 201410402591 A CN201410402591 A CN 201410402591A CN 104174262 B CN104174262 B CN 104174262B
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Abstract
The invention relates to an internal-external water circulation system and technique for flue gas desulfurization. A flue gas desulfurization device and an internal-external water circulation device are arranged in a matched manner; the flue gas desulfurization device is provided with a primary desulfurization barrel, multiple secondary desulfurization barrels, a final desulfurization barrel which are communicated with one another; the secondary desulfurization barrels are successively arranged behind the primary desulfurization barrel side by side; through matching an external circulation pool, an internal circulation pool, an external circulation pump and an internal circulation pump of the internal-external water circulation device, desulfurization water is introduced to different circulation pools; the two circulation pools can be communicated with each other under certain conditions; and the water for desulfurization in the two circulation pools is sufficiently reutilized through the two circulation pumps. According to the internal-external water circulation system and technique for flue gas desulfurization, the desulfurization water can be sufficiently recycled; the desulfurization efficiency is improved; ash slag is deposited in the external circulation pool; settled water is recycled; circulation water pipes and sprayers are unlikely to be blocked; both the loads of the external and internal circulation pools are alleviated; the water circulation pumps are unlikely to wear; the service life is prolonged; and the maintenance cost is reduced and the desulfurization effect is good, the environment-friendly effect is realized.
Description
Technical field
The invention belongs to the separation of gas or steam；The steam of volatile solvent is reclaimed from gas；Waste gas for example starts
Machine waste gas, flue gas, smog, the technical field of flue gas, aerocolloidal chemistry or biological cleaning, particularly to a kind of by cigarette
The interior circulation of desulfurization water is set in desulfurization device simultaneously and external circulating system is used for more rationally carrying out smoke gas treatment and entirety makes
Longer flue gas desulfurization water storing tank and flue gas desulfurization water inner-outer circulation technique with the life-span.
Background technology
Flue gas desulfurization refers to remove oxysulfide (sulfur dioxide, sulfur trioxide etc.) from flue gas or other industrial waste gases
Process.Flue gas desulfurization also known as flue gas desulfurization, abbreviation fgd, in fgd technology, by the species of desulfurizing agent
Divide, can be divided into by caco3(limestone) based on calcium method, the magnesium processes based on mgo, the sodium based on na2so3
Method, the ammonia process based on nh3 and the organic alkaline process based on organic base.
According to the absorbent and desulfurization product dry and wet state in sweetening process, desulfurization technology is broadly divided into wet method, dry method
With half-dried (semi-moist) method.Wherein, Wet Flue Gas Desulfurization Technology is desulfurization under wet condition with the solution containing absorbent or serosity
With process desulfurization product, this method has the advantages that desulphurization reaction speed is fast, equipment is simple, desulfuration efficiency is high, is more common taking off
Sulfur method.
However, existing common desulfurization water circulation system only internal circulation system or only external circulating system, more typically
It is only internal circulation system, by circulating pump by circulatory pool after that is, the desulfurization water of all of desulfurization cylinder all collects toward in a circulatory pool
The shower nozzle that interior desulfurization water is recycled to above desulfurization cylinder carries out desulfurization spraying operation, but only internal circulation system can allow lime-ash
In interior circulation pond deposition, Severe blockage circulating water pipe and shower nozzle, and only external circulating system can allow detritus tank load excessive, impact
Usually effect, thus blocking circulating water pipe and shower nozzle, also can produce heavy wear to water circulating pump when serious.Single desulfurization water
Blood circulation not only reduces work efficiency, integral device service life is reduced, increases maintenance cost, more affects de- simultaneously
Sulfur effect, works the mischief to environment indirectly.
Content of the invention
Present invention solves the technical problem that being, in prior art, desulfurization water circulation system only has internal circulation system or only has
External circulating system, and the only internal circulation system leading to can allow lime-ash in interior circulation pond deposition, Severe blockage circulating water pipe and spray
Head, and only external circulating system can allow detritus tank load excessive, affects sedimentation effect, thus blocking circulating water pipe and shower nozzle, sternly
Weight when also can to water circulating pump produce heavy wear, single desulfurization water circulation system not only reduce work efficiency, make whole
Body service life of equipment reduces, increases maintenance cost, simultaneously more impact desulfurized effect, the problem indirectly environment being worked the mischief,
And then provide flue gas desulfurization water storing tank and the flue gas desulfurization water inner-outer circulation technique of a kind of optimization.
The technical solution adopted in the present invention is that a kind of flue gas desulfurization water storing tank, including the water being equipped with
Inner-outer circulation device and flue gas desulfurization device, described flue gas desulfurization device includes primary desulfurization cylinder, some sequentially side by side located at first
Level desulfurization cylinder after secondary desulfurization cylinder, located at the final stage desulfurization cylinder after secondary desulfurization cylinder and the dehydration after final stage desulfurization cylinder
Cylinder, described primary desulfurization cylinder, secondary desulfurization cylinder, final stage desulfurization cylinder connect with dehydration tube space, and described primary desulfurization cylinder, secondary are de-
Sulfur cylinder and final stage desulfurization cylinder inner upper are provided with shower nozzle, and described primary desulfurization cylinder side wall is provided with smoke inlet, described dehydration tube
Side wall is provided with exhanst gas outlet；Described water inner-outer circulation device include outer circulation pond, interior circulation pond and coordinate described outer circulation pond,
The outer circulation pump of interior circulation pond setting, internal circulation pump, are provided with blocking part between described outer circulation pond and interior circulation pond, described blocking part
Top be provided with notch；Described primary desulfurization cylinder connects outer circulation pond by pipeline, described secondary desulfurization cylinder, final stage desulfurization cylinder and
Dehydration tube connects interior circulation pond by pipeline, and described outer circulation pump passes through circulating water pipe with the shower nozzle within final stage desulfurization cylinder even
Connect, described internal circulation pump is passed through circulating water pipe and is connected with the shower nozzle on primary desulfurization cylinder and secondary desulfurization cylinder.
Preferably, described outer circulation at the bottom of pond portion is provided with precipitation portion.
Preferably, the rear portion in described precipitation portion is provided with overfall.
Preferably, described outer circulation pond is provided with desulfurization slag cleaning device.
Preferably, described primary desulfurization cylinder, some sequentially side by side the secondary desulfurization cylinder after primary desulfurization cylinder, located at secondary
Level desulfurization cylinder after final stage desulfurization cylinder and located between the dehydration tube after final stage desulfurization cylinder respectively interlock be provided with from flue gas desulfurization device
The first baffler arranging top down or the second baffler from the setting of the bottom up of flue gas desulfurization device, described first
It is provided with space between the bottom of baffler and flue gas desulfurization device, be provided between the top of described second baffler and flue gas desulfurization device
Space.
Preferably, described smoke inlet is located at the top of the first baffler and flue gas desulfurization device or the second baffler and cigarette
On the primary desulfurization cylinder side wall of the bottom connecting side of desulfurization device.
Preferably, described exhanst gas outlet is located at the top of the first baffler and flue gas desulfurization device or the second baffler and cigarette
On the dehydration tube side wall of the bottom connecting side of desulfurization device.
Preferably, it is provided with blender inside described interior circulation pond.
A kind of flue gas desulfurization water inner-outer circulation technique of employing flue gas desulfurization water storing tank, described technique include with
Lower step:
Step one: be built into clear water in interior circulation pond, open internal circulation pump, the clear water in interior circulation pond is led to by internal circulation pump
Cross the shower nozzle that circulating water pipe is sent on primary desulfurization cylinder and secondary desulfurization cylinder, spray desulfurization water；
Step 2: the flue gas with oxysulfide is passed through primary desulfurization cylinder by smoke inlet, desulfuration operations start, desulfurization
Act on preliminary desulfurization with water with flue gas, the buck of desulfurization flow to outer circulation pond by pipeline and precipitated, and desulfurization slag is finally assembled
In precipitation portion, supernatant water enters interior circulation pond by the upper notch of blocking part；
Step 3: flue gas in primary desulfurization cylinder after primary desulfurization, by the first baffler or the second baffler with
The gap of the top of primary desulfurization cylinder and secondary desulfurization cylinder or bottom enters secondary desulfurization cylinder and continues desulfurization, and desulfurization passes through spray with water
Head sprays and acts on desulfurization with flue gas continuation；The desulfurization water of secondary desulfurization cylinder flow to interior circulation pond by pipeline；Open outer following simultaneously
Ring pump, the supernatant water in outer circulation pond is sent to the shower nozzle on final stage desulfurization cylinder by outer circulation pump by circulating water pipe, and spray desulfurization is used
Water；
Step 4: flue gas in secondary desulfurization cylinder after desulfurization again, by the first baffler or the second baffler with time
The gap of the top of level desulfurization cylinder and final stage desulfurization cylinder or bottom enters final stage desulfurization cylinder and continues desulfurization, and desulfurization passes through shower nozzle with water
Spray and act on desulfurization with flue gas continuation；The desulfurization water of final stage desulfurization cylinder flow to interior circulation pond by pipeline；
Step 5: flue gas in final stage desulfurization cylinder after final desulfurization, by the first baffler or the second baffler with
The gap of the top of final stage desulfurization cylinder and dehydration tube or bottom enters dehydration tube and is dehydrated；The moisture in flue gas in dehydration tube
After disengaging, interior circulation pond is flow to by pipeline；
Step 6: start the blender in interior circulation pond, and add alkaline solution in interior circulation pond, will by internal circulation pump
Solution in interior circulation pond squeezes into primary desulfurization cylinder and secondary desulfurization cylinder；
Step 7: flue gas, from the exhanst gas outlet pass-out of dehydration tube, completes flue gas desulfurization.
The invention provides a kind of flue gas desulfurization water storing tank of optimization and flue gas desulfurization water inner-outer circulation technique,
By being equipped with the water inner-outer circulation device including interior circulation and outer circulation for flue gas desulfurization device, flue gas desulfurization device is arranged
Space connection primary desulfurization cylinder, some sequentially side by side the secondary desulfurization cylinder after primary desulfurization cylinder, located at secondary desulfurization cylinder
Final stage desulfurization cylinder afterwards and the dehydration tube after final stage desulfurization cylinder, by with the outer circulation pond of water inner-outer circulation device, interior follow
Cisterna ambiens and cooperation outer circulation pond, the outer circulation pump of interior circulation pond setting, internal circulation pump cooperation, desulfurization water is introduced different circulations
Chi Zhong, two circulatory pools can circulate mutually under certain condition, and by two circulations, the desulfurization in two circulatory pools is used
Water is sufficiently recycled；The invention enables desulfurization water energy fully recycles, improve desulfuration efficiency, lime-ash is in outer circulation
Pond is precipitated, and supernatant water carries out water circulation, and circulating water pipe and shower nozzle are not easily blocked, and outer circulation pond and interior circulation pond load subtract
Little, water circulating pump is not easy to wear, and service life extends, and maintenance cost reduces, and desulfurized effect is more preferably, environmental protection.
Brief description
Fig. 1 is the structural representation of the present invention of the secondary desulfurization cylinder of setting 1；
Fig. 2 is the working state schematic representation of the present invention of the secondary desulfurization cylinder of setting 1, and solid arrow represents circulating water flow
To dotted arrow represents flue gas flow direction.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to
This.
As illustrated, the present invention relates to a kind of flue gas desulfurization water storing tank, following including inside and outside the water being equipped with
Loop device and flue gas desulfurization device, described flue gas desulfurization device 1 includes primary desulfurization cylinder 2, some sequentially side by side located at primary de-
Secondary desulfurization cylinder 3 after sulfur cylinder 2, located at the final stage desulfurization cylinder 4 after secondary desulfurization cylinder 3 and the dehydration after final stage desulfurization cylinder 4
Cylinder 5, described primary desulfurization cylinder 2, secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 connect with dehydration tube 5 space, described primary desulfurization cylinder 2,
Secondary desulfurization cylinder 3 and final stage desulfurization cylinder 4 inner upper are provided with shower nozzle 6, and described primary desulfurization cylinder 2 side wall is provided with smoke inlet 7,
Described dehydration tube 5 side wall is provided with exhanst gas outlet 8；Described water inner-outer circulation device includes outer circulation pond 9, interior circulation pond 10 and joins
Close described outer circulation pond 9, the outer circulation pump 11 of interior circulation pond 10 setting, internal circulation pump 12, described outer circulation pond 9 and interior circulation pond
It is provided with blocking part 13, the top of described blocking part 13 is provided with notch between 10；Described primary desulfurization cylinder 2 connects outer following by pipeline 14
Cisterna ambiens 9, described secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 and dehydration tube 5 connect interior circulation pond 10, described outer circulation by pipeline 14
Pump 11 is connected with the shower nozzle 6 within final stage desulfurization cylinder 4 by circulating water pipe 15, described internal circulation pump 12 pass through circulating water pipe 15 with
Shower nozzle 6 on primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 connects.
In the present invention, flue gas desulfurization water inner-outer circulation device includes the water inner-outer circulation device being equipped with and flue gas desulfurization
Device 1, wherein flue gas desulfurization device 1 are the part being substantially carried out flue gas desulfurization operation, and water inner-outer circulation device follows within being
Ring and outer circulation coordinate the structure setting of flue gas desulfurization device 1 to complete the interior circulation of desulfurization water and the device of outer circulation.
In the present invention, flue gas desulfurization device 1 includes primary desulfurization cylinder 2, some sequentially side by side after primary desulfurization cylinder 2
Secondary desulfurization cylinder 3, located at the final stage desulfurization cylinder 4 after secondary desulfurization cylinder 3 and the dehydration tube 5 after final stage desulfurization cylinder 4 and primary
Desulfurization cylinder 2, secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 connect with dehydration tube 5 space, described primary desulfurization cylinder 2, secondary desulfurization cylinder 3
It is provided with shower nozzle 6 with final stage desulfurization cylinder 4 inner upper.Wherein, as first desulfurization, water base of now desulfurization is all for primary desulfurization cylinder 2
It is buck, and when carrying out desulfurization to the flue gas through primary desulfurization cylinder 2 in secondary desulfurization cylinder 3, the sulfide in flue gas is
Considerably less, therefore the number of the secondary desulfurization cylinder 3 of setting can be needed according to actual desulfurization, and the setting meaning of final stage desulfurization cylinder 4
Basic and secondary desulfurization cylinder 3 is consistent, in order to carry out further desulfuration operations for flue gas to be desulfurization；Dehydration tube 5 is mainly used
Flue gas after to wet desulphurization carries out dewatering operation, to ensure the flue gas mass exporting.
In the present invention, water inner-outer circulation device includes outer circulation pond 9, interior circulation pond 10 and cooperation outer circulation pond 9, interior circulation
The outer circulation pump 11 of pond 10 setting, internal circulation pump 12, are provided with the resistance that top is provided with notch between outer circulation pond 9 and interior circulation pond 10
Every portion 13, that is, the water in outer circulation pond 9 can be by the effect guiding otherwise of outer circulation pump 11, the water in interior circulation pond 10
Otherwise can be guided by the effect of internal circulation pump 12, and the water in outer circulation pond 9 can be via on blocking part 13 simultaneously
The notch of side flows to interior circulation pond 10, completes the cyclic process of desulfurization water.Meanwhile, primary desulfurization cylinder 2 is connected by pipeline 14
Outer circulation pond 9, secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 and dehydration tube 5 connect interior circulation pond 10 by pipeline 14, that is, have a large amount of
Grey current direction outer circulation pond 9, buck can precipitate in outer circulatory pool 9, the supernatant current direction interior circulation pond obtaining after precipitation
10, and the desulfurization water of the secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 and dehydration tube 5 of relative clean can flow to interior circulation pond 10 and directly use
In recirculation, this structure solves circulating water pipe 15 and shower nozzle 6 clogging, that is, in circulating water pipe 15, internal circulation pump 12 and outer
In circulating pump 11, work is all cleaner desulfurization water it is ensured that the service life of the present invention and desulfurized effect.
In the present invention, outer circulation pump 11 is connected with the shower nozzle 6 within final stage desulfurization cylinder 4 by circulating water pipe 15, interior circulation
Pump 12 is passed through circulating water pipe 15 and is connected with the shower nozzle 6 on primary desulfurization cylinder 2 and secondary desulfurization cylinder 3, i.e. phase in internal circulation pump 12
Directly by the shower nozzle 6 on primary desulfurization cylinder 2 and secondary desulfurization cylinder 3, primary desulfurization cylinder 2 is acted on to clean water and secondary is de-
On the flue gas of sulfur cylinder 3, and the buck in outer circulation pond 9, due to needing certain supernatant time, is pretended for by final stage desulfurization
Shower nozzle 6 on cylinder 4 act on the flue gas of final stage desulfurization cylinder 4 it is ensured that desulfuration operations reasonable in order, and follow inside and outside completing
Ring is it is ensured that the reasonable domination of desulfurization water, energy-conserving and environment-protective.
Described primary desulfurization cylinder 2, some sequentially side by side the secondary desulfurization cylinder 3 after primary desulfurization cylinder 2, take off located at secondary
Final stage desulfurization cylinder 4 after sulfur cylinder 3 and located between the dehydration tube 5 after final stage desulfurization cylinder 4 respectively interlock be provided with from flue gas desulfurization device 1
The the first baffler 16-1 arranging top down or the second baffler 16- from the setting of the bottom up of flue gas desulfurization device 1
2, it is provided with space between the bottom of described first baffler 16-1 and flue gas desulfurization device 1, described second baffler 16-2 and flue gas
It is provided with space between the top of desulfurizer 1.
In the present invention, when secondary desulfurization cylinder 3 is set to 1, it is provided with from top between primary desulfurization cylinder 2 and secondary desulfurization cylinder 3
Between the bottom of the first baffler 16-1 that portion is arranged down and the first baffler 16-1 and primary desulfurization cylinder 2 and secondary desulfurization cylinder 3
It is provided with space, that is, flue gas, from after be passed through primary desulfurization cylinder 2 outward, reacted by pouring, from shower nozzle 6, the desulfurization water falling, carries out desulfurization work
Industry, and due to flue gas trend upward, top-down desulfurization water is equal to and greatly contacts flue gas so that desulfurization
It is more abundant that operation is carried out, and the flue gas after desulfurization passes through the first baffler 16-1 and primary desulfurization cylinder 2 and secondary desulfurization cylinder 3
Space between bottom marches to secondary desulfurization cylinder 3 from primary desulfurization cylinder 2；It is provided with the bottom of between secondary desulfurization cylinder 3 and final stage desulfurization cylinder 4
Between the top of the second baffler 16-2 that portion sets up and the second baffler 16-2 and secondary desulfurization cylinder 3 and final stage desulfurization cylinder 4
It is provided with space, after that is, the certainly primary desulfurization cylinder 2 of flue gas enters secondary desulfurization cylinder 3, carried out desulfurization by pouring the desulfurization falling water from shower nozzle 6
Operation, and due to flue gas trend upward, top-down desulfurization water is equal to and greatly contacts flue gas so that secondary
It is more abundant that the desulfuration operations of level desulfurization cylinder 3 are carried out, and the flue gas after desulfurization passes through the second baffler 16-2 and secondary desulfurization cylinder 3
Space and between the top of final stage desulfurization cylinder 4 marches to final stage desulfurization cylinder 4 from secondary desulfurization cylinder 3；Final stage desulfurization cylinder 4 and dehydration tube
It is provided with from the first baffler 16-1 of arranging top down between 5 and the first baffler 16-1 and final stage desulfurization cylinder 4 and dehydration tube 5
Be provided with space between bottom, now flue gas carry out similar in the principle of desulfuration operations and primary desulfurization cylinder 2, simply now in flue gas
Sulfide content very low, final stage desulfurization cylinder 4 is the final confirmation of desulfuration operations it is ensured that the content of sulfide in flue gas
As low as possible；Final flue gas carries out final dewatering operation by dehydration tube 5.
Be simplest embodiment of the invention above, in the present invention, secondary desulfurization cylinder 3 could be arranged to multiple, simultaneously the
One baffler 16-1 and the second baffler 16-2 has no priority setting order it is only necessary to ensure to be crisscross arranged.
In the present invention, generally the first baffler 16-1 and the second baffler 16-2 be arranged in parallel.
Described smoke inlet 7 is located at the top of the first baffler 16-1 and flue gas desulfurization device 1 or the second baffler 16-2
On the primary desulfurization cylinder 2 side wall of the bottom connecting side of flue gas desulfurization device 1.
In the present invention, in order to ensure to carry sulfur flue gas energy fully and reactive desulfurizing agent, smoke inlet 7 is general to be intercepted located at first
The primary of the bottom connecting side of the top of plate 16-1 and flue gas desulfurization device 1 or the second baffler 16-2 and flue gas desulfurization device 1
On desulfurization cylinder 2 side wall, that is, flue gas, from after be passed through vertical desulfurization cylinder outward, is carried out desulfuration operations by pouring the desulfurization falling water from shower nozzle 6,
And due to flue gas trend upward, top-down desulfurization water be equal to greatly contact flue gas so that desulfurization make
It is more abundant that industry is carried out.
Described exhanst gas outlet 8 is located at the top of the first baffler 16-1 and flue gas desulfurization device 1 or the second baffler 16-2
On the dehydration tube 5 side wall of the bottom connecting side of flue gas desulfurization device 1.
In the present invention, in order to ensure to carry sulfur flue gas energy fully and reactive desulfurizing agent, exhanst gas outlet is located at the first baffler 16-
1 with dehydration tube 5 side of the top of flue gas desulfurization device 1 or the second baffler 16-2 and the bottom connecting side of flue gas desulfurization device 1
On wall, that is, ensure that flue gas fully can be dehydrated until reaching at exhanst gas outlet 8 in dehydration tube 5.
Described outer circulation pond 9 bottom is provided with precipitation portion.
In the present invention, outer circulation pond 9 bottom arrange precipitation portion so that precipitation after lime-ash can stronger be fixed on heavy
In the portion of shallow lake, reduce lead to lime-ash in outer circulation pond 9 to rise and fall, roll because of the motion of current so that have influence on outer circulation pond 9 with
To water circulating pump when the supernatant water in the flowing of supernatant water in interior circulation pond 10 and outer circulation pond 9 is reused by outer circulation pump 11
Produce heavy wear.
The rear portion in described precipitation portion is provided with overfall.
In the present invention, the lime-ash that goes out for timely scavenger precipitation portion, the sidepiece setting overfall in precipitation portion is so that lime-ash
Transhipment in time can be utilized outer circulation when needing processed it is ensured that the supernatant water energy in outer circulation pond 9 is as much as possible
During.
Described outer circulation pond 9 is provided with desulfurization slag cleaning device.
In the present invention, can adopt and immediately obtain the lime-ash information in precipitation portion in various manners it is ensured that lime-ash is not in outer circulation
The precipitation portion accumulation in pond 9 excessively has influence on being normally carried out of the technique of the present invention, does not also shorten the service life of present system.
In the present invention, when lime-ash runs up to a certain amount of it is necessary to carry out desulfurization slag prune job.Generally, take off
Sulfur slag cleaning device could be arranged to compression pump and the form of forcing press cooperation, clears out to be entered by forcing press after desulfurization slag by compression pump
One step is processed to desulfurization slag, by forcing press, desulfurization slag is carried out after can also being set to shunt serosity in cyclone again
The process of next step.
It is simplest embodiment of the invention above, during actual job, can be according to actual demand to desulfurization slag
The further process of refinement of prune job.
It is provided with blender inside described interior circulation pond 10.
In the present invention, by setting blender inside interior circulation pond 10 it is ensured that not producing caking inside interior circulation pond 10
Phenomenon it is ensured that internal circulation pump 12 working properly, internal circulation pump 12 is not easy to wear, service life extend, maintenance cost reduce,
And desulfurized effect is more preferably, environmental protection.
The process step of the invention is as follows:
Step one: be built into clear water in interior circulation pond 10, open internal circulation pump 12, internal circulation pump 12 is by interior circulation pond 10
Clear water be sent to shower nozzle 6 on primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 by circulating water pipe 15, spray desulfurization water；
Step 2: the flue gas with oxysulfide is passed through primary desulfurization cylinder 2 by smoke inlet 7, and desulfuration operations start, takes off
Sulfur water acts on preliminary desulfurization with flue gas, and the buck of desulfurization flow to outer circulation pond 9 by pipeline 14 and precipitated, and desulfurization slag is final
It is gathered in precipitation portion, supernatant water enters interior circulation pond 10 by the upper notch of blocking part 13；
Step 3: flue gas after primary desulfurization, is intercepted by the first baffler 16-1 or second in primary desulfurization cylinder 2
Plate 16-2 enters secondary desulfurization cylinder 3 with the top of primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 or the gap of bottom and continues desulfurization, takes off
Sulfur water passes through shower nozzle 6 and sprays and flue gas continuation effect desulfurization；The desulfurization water of secondary desulfurization cylinder 3 flow to interior circulation by pipeline 14
Pond 10；Open outer circulation pump 11, the supernatant water in outer circulation pond 9 is sent to final stage by circulating water pipe 15 by outer circulation pump 11 simultaneously
Shower nozzle 6 on desulfurization cylinder 4, sprays desulfurization water；
Step 4: flue gas in secondary desulfurization cylinder 3 after desulfurization again, by the first baffler 16-1 or the second baffler
16-2 enters final stage desulfurization cylinder 4 with the top of secondary desulfurization cylinder 3 and final stage desulfurization cylinder 4 or the gap of bottom and continues desulfurization, desulfurization
Pass through shower nozzle 6 with water to spray and flue gas continuation effect desulfurization；The desulfurization water of final stage desulfurization cylinder 4 flow to interior circulation pond by pipeline 14
10；
Step 5: flue gas after final desulfurization, is intercepted by the first baffler 16-1 or second in final stage desulfurization cylinder 4
Plate 16-2 enters dehydration tube 5 with the top of final stage desulfurization cylinder 4 and dehydration tube 5 or the gap of bottom and is dehydrated；In dehydration tube 5
Moisture in flue gas flow to interior circulation pond 10 by pipeline 14 after departing from；
Step 6: start the blender in interior circulation pond 10, and add alkaline solution in interior circulation pond 10, by interior circulation
Solution in interior circulation pond 10 is squeezed into primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 by pump 12；
Step 7: flue gas, from exhanst gas outlet 8 pass-out of dehydration tube 5, completes flue gas desulfurization.
In the present invention, step one ensures before flue gas desulfurization operation starts, and whole water inner-outer circulation device is started working, cigarette
Desulfurization device 1 is wet so that flue gas can carry out flue gas desulfurization operation so that first in time once entering flue gas desulfurization device 1
The sulfur-containing compound of the overwhelming majority just can be got rid of in level desulfurization cylinder 2.
In the present invention, in step 2, the buck of desulfurization flow to outer circulation pond 9 by pipeline 14 and is precipitated, and desulfurization slag is final
Be gathered in outer circulation pond 9 bottom, herein in outer circulatory pool 9 setting precipitation portion so that lime-ash can faster stronger precipitation, poly-
Collection, the desulfurization water after supernatant can enter interior circulation pond 10 by the notch on blocking part 13 top；Meanwhile, in outer circulation pond 9
Supernatant water also need to be used in outer circulation.
In the present invention, in step 3, the desulfurization water of secondary desulfurization cylinder 3 flow to interior circulation pond 10 by pipeline 14, taking off now
Sulfur water relative clean, can directly be re-used in interior circulation.
In the present invention, step San Tong method open outer circulation pump 11, the now basic supernatant of buck in outer circulation pond 9, therefore
Using outer circulation pump 11, the supernatant water in outer circulation pond 9 can be sent to the shower nozzle 6 on final stage desulfurization cylinder 4 by circulating water pipe 15
To spray desulfurization water, complete the flue gas desulfurization operation of final stage.
In the present invention, in step 4, the desulfurization water of secondary desulfurization cylinder 3 flow to interior circulation pond 10 by pipeline 14, taking off now
Sulfur water relative clean, can directly be re-used in interior circulation.
In the present invention, in step 5, the desulfurization water of final stage desulfurization cylinder 4 and dehydration tube 5 flow to interior circulation pond by pipeline 14
10, desulfurization water relative clean now, can directly be re-used in interior circulation.
In the present invention, in step 3, step 4 and step 5, secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 and dehydration tube 5 de-
Sulfur water all flows into interior circulation pond 10, due to water base supernatant of the desulfurization in interior circulation pond 10, therefore can be incited somebody to action using internal circulation pump 12
Desulfurization water in interior circulation pond 10 by circulating water pipe 15 be sent to again shower nozzle 6 on primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 with
Spray desulfurization water, complete to be formed recycling of desulfurization water while flue gas desulfurization operation.
In the present invention, in step 6, start the blender in interior circulation pond 10, and it is molten to add alkalescence in interior circulation pond 10
Liquid so that do not produce inside interior circulation pond 10 caking phenomenon it is ensured that internal circulation pump 12 working properly, internal circulation pump 12 is difficult
Abrasion, service life extends, and maintenance cost reduces, and desulfurized effect is more preferably, environmental protection.
In the present invention, the alkaline solution addressed in step 6 is generally desulfurizing agent, such as Calx, limestone and use calcium carbonate medicine
That agent is prepared or soda, magnesium oxide and other can do the alkaline solution of desulfurizing agent.
In the technique of the present invention, the flow direction of recirculated water is: the buck that primary desulfurization cylinder 2 desulfurization produces flows into outer circulation pond 9
Precipitated, heavy clean water overflow enters in interior circulation pond 10, the current of secondary desulfurization cylinder 3, final stage desulfurization cylinder 4 and dehydration tube 5
Enter interior circulation pond 10, primary desulfurization cylinder 2 and secondary desulfurization cylinder 3 are circulated back to by internal circulation pump 12, and outer circulation pump 11 is followed outward
Supernatant water alone cycle in cisterna ambiens 9 returns to final stage desulfurization cylinder 4.
The technique of the present invention allows desulfurization water to recycle, and does not have waste water to discharge.Can timing after desulfurization slag precipitation
Cleaning is transported, conveniently, safely, environmental protection.
In the present invention, outer circulation pump 11 and internal circulation pump 12 can calculate control by control circuit control via control circuit
System completes the operation opening and closing so that sprinkling desulfurization water in primary desulfurization cylinder 2, secondary desulfurization cylinder 3 and final stage desulfurization cylinder 4
Opportunity more appropriate, ensure that simultaneously outer circulation pump 11 will not be opened too early and to water circulating pump produce heavy wear.
In the present invention, control circuit can be according to those skilled in the art to the reason controlling outer circulation pump 11 and internal circulation pump 12
Solution setting.
The present invention solves in prior art, desulfurization water circulation system only internal circulation system or only external circulating system,
And the only internal circulation system leading to can allow lime-ash deposit in interior circulation pond 10, Severe blockage circulating water pipe 15 and shower nozzle 6, and only
There is external circulating system that detritus tank load can be allowed excessive, impact usually effect, thus block circulating water pipe 15 and shower nozzle 6, when serious
Also heavy wear can be produced to water circulating pump, single desulfurization water circulation system not only reduces work efficiency, so that overall set
Standby service life reduces, increases maintenance cost, more affects desulfurized effect, the problem indirectly environment being worked the mischief simultaneously, passes through
It is equipped with the water inner-outer circulation device including interior circulation and outer circulation for flue gas desulfurization device 1, flue gas desulfurization device 1 arranges sky
Between connection primary desulfurization cylinder 2, some sequentially side by side the secondary desulfurization cylinder 3 after primary desulfurization cylinder 2, located at secondary desulfurization cylinder
Final stage desulfurization cylinder 4 after 3 and the dehydration tube 5 after final stage desulfurization cylinder 4, by with the outer circulation pond 9 of water inner-outer circulation device,
Interior circulation pond 10 and cooperation outer circulation pond 9, the outer circulation pump 11 of interior circulation pond 10 setting, internal circulation pump 12 coordinate, by desulfurization water
It is introduced in different circulatory pools, two circulatory pools can circulate mutually under certain condition, and by two circulations, two are followed
Desulfurization in cisterna ambiens is sufficiently recycled with water；The invention enables desulfurization water energy fully recycles, improve desulfurization effect
Rate, lime-ash is precipitated in outer circulatory pool 9, and supernatant water carries out water circulation, and circulating water pipe 15 and shower nozzle 6 are not easily blocked, outer circulation
Pond 9 and interior circulation pond 10 load reduce, and water circulating pump is not easy to wear, and service life extends, and maintenance cost reduces, and desulfurized effect
More preferably, environmental protection.
Claims (8)
1. a kind of flue gas desulfurization water storing tank, including the water inner-outer circulation device being equipped with and flue gas desulfurization device,
It is characterized in that: described flue gas desulfurization device includes primary desulfurization cylinder, some sequentially secondary after primary desulfurization cylinder side by side
Desulfurization cylinder, located at the final stage desulfurization cylinder after secondary desulfurization cylinder and the dehydration tube after final stage desulfurization cylinder, described primary desulfurization cylinder,
Secondary desulfurization cylinder, final stage desulfurization cylinder connect with dehydration tube space, in described primary desulfurization cylinder, secondary desulfurization cylinder and final stage desulfurization cylinder
It is provided with shower nozzle, described primary desulfurization cylinder side wall is provided with smoke inlet, and described dehydration tube side wall is provided with exhanst gas outlet above portion；
Described water inner-outer circulation device includes outer circulation pond, interior circulation pond and coordinates described outer circulation pond, outer the following of interior circulation pond setting
Ring pump, internal circulation pump, are provided with blocking part between described outer circulation pond and interior circulation pond, the top of described blocking part is provided with notch；Institute
State primary desulfurization cylinder and outer circulation pond is connected by pipeline, described secondary desulfurization cylinder, final stage desulfurization cylinder and dehydration tube are by pipeline even
Connect interior circulation pond, described outer circulation pump is connected with the shower nozzle within final stage desulfurization cylinder by circulating water pipe, described internal circulation pump leads to
Cross circulating water pipe to be connected with the shower nozzle on primary desulfurization cylinder and secondary desulfurization cylinder；Described primary desulfurization cylinder, some sequentially set side by side
In the secondary desulfurization cylinder after primary desulfurization cylinder, located at the final stage desulfurization cylinder after secondary desulfurization cylinder and taking off after final stage desulfurization cylinder
Interlock respectively between water drum and be provided with the first baffler arranging top down from flue gas desulfurization device and from flue gas desulfurization device
Second baffler of bottom up setting, is provided with space between the bottom of described first baffler and flue gas desulfurization device, and described the
It is provided with space between the top of two bafflers and flue gas desulfurization device.
2. a kind of flue gas desulfurization water storing tank according to claim 1 it is characterised in that: described outer circulation at the bottom of pond
Portion is provided with precipitation portion.
3. a kind of flue gas desulfurization water storing tank according to claim 2 it is characterised in that: behind described precipitation portion
Portion is provided with overfall.
4. a kind of flue gas desulfurization water storing tank according to claim 1 it is characterised in that: described outer circulation pond sets
There is desulfurization slag cleaning device.
5. a kind of flue gas desulfurization water storing tank according to claim 1 it is characterised in that: described smoke inlet sets
Primary in the top of the first baffler and flue gas desulfurization device or the second baffler and the bottom connecting side of flue gas desulfurization device
On the wall of desulfurization cylinder side.
6. a kind of flue gas desulfurization water storing tank according to claim 1 it is characterised in that: described exhanst gas outlet sets
Dehydration in the top of the first baffler and flue gas desulfurization device or the second baffler and the bottom connecting side of flue gas desulfurization device
On the wall of cylinder side.
7. a kind of flue gas desulfurization water storing tank according to claim 1 it is characterised in that: in described interior circulation pond
Portion is provided with blender.
8. inside and outside the flue gas desulfurization water of flue gas desulfurization water storing tank described in a kind of employing any one of claim 1～7
Circulation technology it is characterised in that: described technique comprises the following steps:
Step one: be built into clear water in interior circulation pond, open internal circulation pump, the clear water in interior circulation pond is passed through to follow by internal circulation pump
Ring water pipe is sent to the shower nozzle on primary desulfurization cylinder and secondary desulfurization cylinder, sprays desulfurization water；
Step 2: the flue gas with oxysulfide is passed through primary desulfurization cylinder by smoke inlet, desulfuration operations start, desulfurization water
Act on preliminary desulfurization with flue gas, the buck of desulfurization flow to outer circulation pond by pipeline and precipitated, and desulfurization slag is eventually collected in heavy
Shallow lake portion, supernatant water enters interior circulation pond by the upper notch of blocking part；
Step 3: flue gas in primary desulfurization cylinder after primary desulfurization, by the first baffler or the second baffler with primary
The gap of the top of desulfurization cylinder and secondary desulfurization cylinder or bottom enters secondary desulfurization cylinder and continues desulfurization, and desulfurization water is sprayed by shower nozzle
Spill and act on desulfurization with flue gas continuation；The desulfurization water of secondary desulfurization cylinder flow to interior circulation pond by pipeline；Open outer circulation pump simultaneously,
Supernatant water in outer circulation pond is sent to the shower nozzle on final stage desulfurization cylinder by outer circulation pump by circulating water pipe, sprays desulfurization water；
Step 4: flue gas after desulfurization again, is taken off with secondary by the first baffler or the second baffler in secondary desulfurization cylinder
The gap of the top of sulfur cylinder and final stage desulfurization cylinder or bottom enters final stage desulfurization cylinder and continues desulfurization, and desulfurization water is sprayed by shower nozzle
Act on desulfurization with flue gas continuation；The desulfurization water of final stage desulfurization cylinder flow to interior circulation pond by pipeline；
Step 5: flue gas in final stage desulfurization cylinder after final desulfurization, by the first baffler or the second baffler and final stage
The gap of the top of desulfurization cylinder and dehydration tube or bottom enters dehydration tube and is dehydrated；Moisture in flue gas in dehydration tube departs from
Afterwards interior circulation pond is flow to by pipeline；
Step 6: start the blender in interior circulation pond, and add alkaline solution in interior circulation pond, followed interior by internal circulation pump
Solution in cisterna ambiens squeezes into primary desulfurization cylinder and secondary desulfurization cylinder；
Step 7: flue gas, from the exhanst gas outlet pass-out of dehydration tube, completes flue gas desulfurization.
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| CN201410402591.5A CN104174262B (en) | 2014-08-16 | 2014-08-16 | Internal-external water circulation system and technique for flue gas desulfurization |
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| CN104478152B (en) * | 2014-12-29 | 2016-04-27 | 丹东东方机电工程有限公司 | Desulphurization system is containing sodium salt wastewater treatment equipment |
| CN105498426A (en) * | 2016-01-21 | 2016-04-20 | 遵义兴和能源有限公司 | Dust collection and sedimentation device |
| CN111167266B (en) * | 2018-11-12 | 2024-03-29 | 长鑫存储技术有限公司 | Exhaust gas treatment system and method |
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