CN1345997A - Treating method for converting waste liquid produced in paper-making process into usable resource. - Google Patents
Treating method for converting waste liquid produced in paper-making process into usable resource. Download PDFInfo
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- CN1345997A CN1345997A CN 01115858 CN01115858A CN1345997A CN 1345997 A CN1345997 A CN 1345997A CN 01115858 CN01115858 CN 01115858 CN 01115858 A CN01115858 A CN 01115858A CN 1345997 A CN1345997 A CN 1345997A
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Abstract
The present invention relates to a method for converting the waste liquor (or sludge in the waste liquor) produced in the paper-making industry into useful resource, including the following steps: adidng a certain quantity of inorganic and/or organic material to convert waste liquor into solid which can be formed by means of compression; adopting destructive distrillation, fragmentation and condensation processes to separate out water content and pyrolysis gas from solid product; if the obtianed solid product contains soluble substance in its interior, adopting leaching process to separate it from solid product so as to implement said invention.
Description
The invention discloses and a kind ofly how papermaking wastewater (or the sediment in the waste liquid) is carried out resource and transform the general usability methods of administering, belong to environment and resources domain.Particularly how by making it change mouldable state into an amount of quick lime after method such as overmolding, nature and/or artificial drying, destructive distillation separate, leaching separates by adding organic discarded object earlier papermaking wastewater stoste by liquid state, waste liquid and the additive that increased be converted into supply industrial and agricultural production and civilian various resources, thereby realize the method for radical cure.
The ■ background technology:
Paper industry generally adopts imonium ((NH4) at present
2SO
3) method slurrying and alkaline process (NaOH or CaO) slurrying.The a large amount of dischargings of these two kinds of high concentration papermaking wastewaters that pulping process produced (particularly NaOH pulping waste liquor) are to cause river pollution, destroy a main cause of the ecological balance.Think can with lower cost or revenue and expenditure quite and realize radical cure following several class methods are arranged at present:
1. hygrochase is separated technology.
For the waste liquid that is produced with NaOH slurrying, have both at home and abroad by using ' hygrochase is separated technology ' to wish to reach the case history and the achievement in research of resource type treating.Its main technique is for being about in the of 350 ℃ with papermaking wastewater in temperature, and pressure is to feed SO under the condition of 20MPa
2Obtain breeze and cracked gas after reacting (with CH
4Be main), be back to papermaking again with the raffinate causticization and after mending NaOH then.
Because this method equipment purchasing and operating cost costliness require very high; And pay product composition complexity, and be difficult to separation and purification as product, be difficult to obtain economic benefit in the actual production.Therefore this improvement method does not have market substantially in reality is promoted.Existing engineering also is in shut down condition.
2. separate out the lignin method, comprise the various methods that lignin separated out by adding additive, chelating agent.
According to the industrial practice that has carried out, the consumption market that the basic outlet that this class is separated out the improvement method of lignin is to reduce cost and searches out reliably, can consume in a large number for a large amount of lignin of separating out.Owing to lack this condition, the same shut down condition that is in because of efficiency problem of these class methods.Annual actual motion fate is very limited, and the lignin of bulk deposition has caused new pollution again.
3. alkali recovery technology, promptly from the extraction of spent pulping liquor, evaporation, burning, to finishing causticization and reclaiming the reusable set technique of NaOH.
But this alkali recovery technology proves through industrial practice, have at present silicon disturb, burn difficult, causticization after " white clay " produce technical barriers such as secondary pollution.And an amount of investment is huge, tens million of approximately units, and the alkali cost recovery also may be higher than market price by 100% conversion of NaOH amount.From having finished paper plant's ruuning situation analysis of alkali recovery process, just because of above-listed factor, many units are " establishing " and need not.Annual actual motion fate is very limited.
The inventor (application number: the method by additive of having proposed 99120156.6) is converted into the black liquor of high concentration to be used further to after solid-state the method for building with clean coal market at 1999.9.6 " a kind of resource type treating method of waste liquor in alkaline process paper making ".Can know that from industrial practice this is minimum, the regulation effect the best way of a kind of investment at present.The investment of only tens thousand of units just can all be converted into other products with the black liquor of high concentration.And operating cost is low, and required making an investment in time of several days just can be regained from the product income that transforms.But in this invention, do not relate to the problem that how solid content in the papermaking wastewater is more made full use of.Because the product quantity that transforms is bigger, on export trade is handled, inconvenience is arranged also.
5. the inventor is at 2000.9.24 " a kind of method of papermaking wastewater resource " (application number: proposed to carry out with the papermaking wastewater after solidifying the method processing of cracking 00126564.4) again, thereby can realize the basic improvement of papermaking wastewater.But its process is more loaded down with trivial details.And many physics sensible heats of process do not obtain utilizing.
Still do not see at present and carry out resource conversion improvement method what Ammonium Sulfite Method, papermaking wastewater (or the sediment in the waste liquid) that alkali paper-making produced generally all were suitable for.
The purpose of ■ invention:
The purpose of this invention is to provide a kind of technically reliably, feasible and the paper industry waste liquid had the basic skills that the resource of general significance of application transform to be administered economically.
It only is for " qualified discharge " that the present invention has abandoned traditional treating waste liquid, but will transform by resource, and it is converted into the commodity with extensive consumption market.Thereby reach in administering pollution course present want " disbursement " changed into " additional income ".
The ■ technical scheme
In order to achieve the above object, technical scheme of the present invention is a waste liquid (or the sediment in the waste liquid) that paper industry is produced by with adding certain quick lime and/or organic discarded object (as straw, shell, skin, brewing industry, grocery trade, organic waste matter that the fruits processing industry is produced even the organic waste matter in the municipal refuse) method waste liquid is converted into have multiple composition and can pass through compression forming, the solid that again can outdoor storage after the moulding carries out air dry, and then pass through artificial drying, the method of carbonization decomposition and condensation is separated moisture and cracking gas from solid product, if in the solid product of gained, solable matter is arranged, then further it is separated from solid product, thereby realize that papermaking wastewater is carried out resource to be transformed with the method for leaching.
The basic principle of the technical scheme of the invention process process can be used the block representation shown in (accompanying drawing one).
The explanation that (accompanying drawing two) is detailed according to above-mentioned basic principle with the whole conversion processes of waste liquid (or the sediment in the waste liquid) that pulping with ammonium sulfite method produced.The explanation that (accompanying drawing three) is detailed according to above-mentioned basic principle with the whole conversion processes of waste liquid (or the sediment in the waste liquid) that soda pulping process produced.
In (accompanying drawing two) and (accompanying drawing three), if what administer is sediment in the waste liquid that obtains by the whole bag of tricks (as deposition method, the precipitation method), its moisture content higher (such as, this moment, sediment was fluidised form, can pumping) time, should treat by ' stoste '; If the sediment moisture content lower (such as, this moment sediment be lotion, the pumping difficulty) time, should treat by adding ' organic discarded object '.
The effect of ■ invention:
The present invention have method easy, do not need special evaporation concentration equipment, the concentration of the high-concentration waste liquid that uses as product is not subjected to the material purity of device-restrictive, separation higher, can be in the paper mill innerly transform the technical advantage that the back all consumes on the spot, added value is high.
According to laboratory results and theoretical calculating, inference, following column data and possibility are arranged according to aforesaid technical scheme:
● when the mixture slurry from rotary spherical digester outlet is adopted three grades of counter flow in series washings, enter that content of lignin can be controlled at about in the of 3% in the paper pulp in stage casing, promptly not only improved the solid content in the stoste, and can cut down middle section water consumption significantly;
● can well combine how making full use of the radical cure of biomass energy with waste liquid.In fact the paper mill has become two production systems in this case: one is original paper system.Another is to serve biomass energy conversion and processing and utilization, the alkali of paper-making process or comprehensive process and the supply system that ammonium sulfite reclaims that papermaking wastewater is administered.
Owing to taken into full account the recycling of various residual heat resources in the system, theoretical its energy conversion efficiency of calculating can be greater than 90%.Because low-grade original state biomass energy is converted into high-grade fuel gas and the very high charcoal resource of chemism, therefore to calculate according to the present market price, its profit margin also will be higher than the paper mill about in the of one times.
● owing to can make full use of multiple biomass energy and can be converted into fuel gas in a large number, therefore this invention is also for having created advantage in township enterprise's enforcement with " combustion gas--Steam Combined Cycle is hot and cold, Electricity Federation product ".
● can realize that ' not having useless ' produces or ' innoxious technology ' provides an exemplary sample project with good result for modern industry.
The explanation that ■ is detailed:
Generally adopt two kinds of different papermaking process of pulping with ammonium sulfite method and soda pulping process according to domestic and international paper industry, also slightly variant to the process of the two kinds of different effluent resources that pulping process produced improvement according to above-mentioned basic principle, detailed is described below:
(1) is converted into the improvement detailed process of resource about the spent pulping liquor of Ammonium Sulfite Method papermaking
The explanation that (accompanying drawing two) is detailed with the whole conversion processes of the waste liquid that pulping with ammonium sulfite method produced.As if describing of repeating there is no need, and now some process is further explained with clear and definite as follows:
1. in (accompanying drawing two), increased the suggestion user in addition in order to reduce the middle section water consumption and to make high any the known method of the original liquid concentration of extruding as far as possible, promptly at first adopted method the washing of paper pulp counter flow in series.This is a kind of method commonly used on industrial production.If during the paper technology permission, even can replace water to add rotary spherical digester with a part of stoste, that can obtain the stoste of higher concentration.
2. flow process
Process in, represented following implication:
● if the user locality has abundant organic waste material (as straw, shell, skin, organic waste matter that brewing industry, grocery trade, fruits processing industry are produced even the organic waste matter in the municipal refuse), then should at first consider a large amount of addings.Add the inanimate matter composition as far as possible less, only just can satisfy moulding in the process, drying and cracking process needs.
● many-sided factors such as the material source that when needs add inanimate matter material, at first will consider to add, price, function.Though the quick lime resource is general, can absorb the water of own wt 32% and in hydration process, emit certain heat, be Ca (OH)
2When existing, form can return to original state again after the cracking.But solid sulfur functional is but arranged in cracking process, therefore when selecting lime for use, only exist
When product needed is made for fuel outward with the moulded coal form during stage, just can consider to use.At this moment, moulding after
Be
●
Then be expressed the organic and inorganic material purpose that adds can moulding after being intended to mix they and waste liquid and carry out destructive distillation, therefore should be optimized selection according to taking all factors into consideration many-sided factors such as source, price, function.Have cheap clay (comprising loess), clay mine tailing or bentonite resource such as, locality, and the product after the destructive distillation quenching also has large-scale purposes, so just can select these materials to make the inanimate matter additive; And local if a large amount of discarded object vinasse that produce of winery are arranged, perhaps bagasse, potato slag, and do not receive or only receive few expense then should at first use these article.
●
Also has following implication: enough serve as when making curing materials when handle resulting solid product through cracking, can no longer buy curing materials in this case from the external world.At this moment, this flow process to
The quantity of sending into is zero.
3. flow process
Process in, represented following implication:
If ● because organic waste material lacks or do not wish to administer gigantic project, then the destructive distillation product directly can be entered next circulation as the curing materials of next circulation.Adding under the cost of material condition with higher, this should be a method commonly used, when the quality that always is recycled to solid product meets requiring of user till.Owing to so make to make full use of the physics sensible heat of destructive distillation product, therefore also meet energy-conservation principle.
● owing to add raw material difference, ratio difference, in fact be not need to pulverize just to be powder or fine grained chippings state through destructive distillation and some situation of quenching processing back, such as at quick lime content greater than 30%, just may occur when perhaps briquetting pressure is low, at this moment just can not pulverize.Moisture is principle to its granule size in moulding and a large amount of absorption waste liquid making things convenient for.
(2) be converted into the detailed governance process of resource about the spent pulping liquor of alkaline process (NaOH) papermaking
The explanation that (accompanying drawing three) is detailed the waste liquid that produces of soda pulping process transform all processes.As if describing of repeating there is no need, and now some process is further explained with clear and definite as follows:
1. in (accompanying drawing three), equally also increased the suggestion user in addition in order to reduce the middle section water consumption and to make high any the known method of the original liquid concentration of extruding as far as possible, promptly at first adopted method the washing of paper pulp counter flow in series.This also is same a kind of method of using in ' alkali recovery ' technology.If during the paper technology permission, even can replace water to add rotary spherical digester with a part of stoste, that can obtain the stoste of higher concentration.
2. flow process
Process in represented similar following implication equally:
That is,
● if the user locality has abundant organic waste material (as straw, shell, skin, organic waste matter that brewing industry, grocery trade, fruits processing industry are produced even the organic waste matter in the municipal refuse), then should at first consider a large amount of addings, and add the inanimate matter composition less as far as possible, only just can satisfy moulding in the process, drying and cracking needs.
● many-sided factors such as the material source that when needs add inanimate matter material, at first will consider to add, price, function.Because the quick lime resource is general, can absorb the water of own wt 32% and emit certain heat in hydration process, can return to original state again after cracking, in fuel, use to also have sulphur, combustion aid function admittedly, therefore should at first consider to select for use.
●
Then be expressed the organic and inorganic material purpose that adds can moulding after being intended to mix they and waste liquid and carry out destructive distillation, therefore should be optimized selection according to taking all factors into consideration many-sided factors such as source, price, function.Have cheap clay (comprising loess), clay mine tailing or bentonite resource such as, locality, and the product after the destructive distillation quenching also has large-scale purposes, so just can select these materials to make the inanimate matter additive; And local if a large amount of discarded object vinasse that produce of winery are arranged, perhaps bagasse, potato slag, and do not receive or only receive few expense then should at first use these article.
●
Also has following implication: enough serve as when making curing materials when handle resulting solid product through cracking, can no longer buy curing materials in this case from the external world.At this moment, this flow process to
The quantity of sending into is zero.
3. in flow process
During the stage, deducting alkali and the air-dried basis caloric value Qnet.ad ≮ 21MJ/kg after the alkali leachable wherein or reaching the suitable standard of using by oneself or selling if the solid product in the kiln has reached, for the solution when water logging separates alkali and alkali leachable is limpid, should and add the water wet-milling with the water vapour quenching.
4. about
All solid products after quenching is handled all should or be convenient to the carrying out that water logging separates charcoal, active carbon and alkali and alkali leachable process according to convenient further moulding and be the principle pulverization process.Fineness is higher, and effect better.
5. about
Here only be an example when solid product is acted as a fuel use after immersion separates alkali and alkali leachable.Such as for enrichment of N a in solid product
+, be that the product that will repeatedly recycle destructive distillation serves as the additive use too so that raising can improve its concentration when immersion separates alkali and alkali leachable.
6. about
Use waste liquor in alkaline process paper making not resemble that tool haves ripe experience the Ammonium Sulfite Method waste liquid.Because
Stage can't be removed Na wherein
+No matter, therefore to produce lytag or, all can reduce its fusion temperature as briquette binder as sintering process, this in use should give one's full attention to.Especially when the briquette binder, more be noted that in order to avoid make the intensity of slag slagging scorification too high and cause device damage.
(3) major product that finally changes into of Ammonium Sulfite Method and alkaline process (NaOH) waste liquid:
By above-mentioned technology, can obtain the product shown in following table " papermaking wastewater can resources converted detail list ".In table, also listed in the process shown in (accompanying drawing two) through extension the main channel of the product that can obtain.
Ammonium Sulfite Method and alkaline process (NaOH) papermaking wastewater can the resources converted detail list
| The waste liquid kind | Product and main application or main channel supplementary notes to obtaining | ||||||||
| The high concentration paper pulp waste liquid | (NH 4) 2SO 3, ammoniacal liquor | Charcoal | With CH 4, H 2, CO is the combustion gas of key component | NaOH solution | Active carbon | Sodium metasilicate | SiO 2 | Wood tar | |
| The Ammonium Sulfite Method waste liquid | 1. make refractory material and moulded coal binding agent.2. Concrete Additive. | 1. be back to papermaking.2. quick-acting fertilizer.3. ammonia is separated feed. | 1 makes conventional fuel uses.2. make raw materials such as silicon metal, ferrosilicon stove. | 1. be used for this enterprise boiler certainly.2. the resident uses.3. other industrial utilization.Owing to obtain fuel gas controllable number system, therefore provide strong support condition for implementing " hot and cold, the cogeneration system of combustion gas-Steam Combined Cycle ". | Do not have | Destructive distillation product when not adding the inanimate matter additive further removes SiO with soda boiling 2And it is levigate. | Need with the SiO in the alkali lye dissolving charcoal 2After separating, just can obtain. | Continuing deep processing by sodium metasilicate obtains. | The retort process byproduct.Doing preservative agent or deep processing is solvent naphtha and pitch.(annotate: in accompanying drawing two, accompanying drawing three, do not show.) |
| 1. make conventional fuel and fuel additive and be used for burning.2 make raw material of calcium carbide furnace.3. make the active carbon raw material. | |||||||||
| The alkaline process waste liquid | 1. lytag binding agent, flux.2 briquette binders. | Do not have | 1. be back to papermaking.2. make the sodium metasilicate raw material. | It is the very big active carbon of a kind of total surface area.It can be the substitute of present commercially available active carbon. | Heat pressurized treatments or roasting of leaching liquid can get. | Can further extract silicon or be processed into siliceous material, silicide. | |||
(4) be converted into the detailed governance process of resource about spent pulping liquor with lime papermaking papermaking
It is the most direct using the present invention to administer for the waste liquid that is produced with lime method papermaking.
Because existing lime paper mill major part all has only beater not have press master, so water consumption is very big, and can not directly obtain the waste liquid of high concentration.Suitable method is to increase press master.
Beginning to start with from the paste refuse that large numbers of waste water that beater produced are settled out through sedimentation basin, to administer be the place that is different from aforementioned two kinds of waste liquids.The process chart of this moment can be according to (accompanying drawing two)
Following flow process is carried out.
In order to reduce the export trade quantity of product, also can be according to after its principle that changes mouldable state into being drunk add organic discarded object and an amount of quick lime, through overmolding, nature and/or artificial drying, cracking more than 600 ℃, just can obtain the fuel gas of cracking and the mixture of charcoal and CaO.This mixture can both can be used as organic discarded object in next circulation substitute is used for the thickening moulding, the residue that also can directly make fuel and will be with CaO main component after burning is recycled and reused for slaking wheat straw, straw, it can also be produced cement as the cement raw meal nodule raw material for the cement plant.
■ embodiment:
(embodiment one) imonium ((NH4)
2SO
3) the resource type treating laboratory test process and the conclusion of method pulping waste liquor:
Get the waste liquid 1000g (proportion is 1.08) that extrudes by press master, add the maize straw 300～450g that pulverizes, add 300g calcium lime powder (in order to quicken the quick lime aquation) again, after stirring, leave standstill 2h and can change plastic state into.Be pressed into coal briquette shape then.Air-dry through 24h when temperature is 20 ℃, the external free moisture content of formed article can be reduced to about in the of 25% by 48%.Place airtight electric furnace to carry out destructive distillation then under 800 ℃ condition and handle, can obtain about 300g caloric value is 21MJ/m
3High-quality fuel gas and 200g solid product.
The above-mentioned solid product that is in scorching hot state is with the waste liquid quenching and repeat to use as additive, repeats can to obtain after ten times combustible content and is 82.46% charcoal product and make fuel or do other purposes use.
The effect that adds quick lime mainly contains following function:
● can absorb the moisture of quick lime own wt about 32%;
● the hydration heat process can evaporate portion of water;
● make formed article have waterproof ability;
● pyrolysis temperature greater than 600 ℃ condition under, return to the CaO state again, the function more than can be in the next round production process recovering again.
The resource type treating laboratory test process and the conclusion of (embodiment two) alkaline process (NaOH) pulping waste liquor:
Get the waste liquid 1000g (proportion is 1.09) that extrudes by press master, add the maize straw 300～450g that pulverizes, add 300g calcium lime powder (in order to quicken the quick lime aquation) again, after stirring, leave standstill 2h and can change plastic state into.Be pressed into coal briquette shape then.Air-dry through 24h when temperature is 20 ℃, the external free moisture content of formed article can be reduced to about in the of 25% by 48%.Place airtight electric furnace to carry out destructive distillation then under 800 ℃ condition and handle, can obtain about 300g caloric value is 21MJ/m
3High-quality fuel gas and 260g solid product.
The above-mentioned solid product that is in scorching hot state is with waste liquid quenching (last water quenching) and repeat to use as additive, and can to obtain combustible content be 82.46% charcoal product and NaOH (amounting to 100% content) 0.50kg (amount to NaOH total amount in the waste liquid 85%) and a spot of SiO to the water digestion after repeating to pulverize after ten times
2
(embodiment three) imonium ((NH4)
2SO
3) the resource type treating laboratory test of method pulping waste liquor obtains the process of high concentration paper pulp waste liquid:
Experimentation is with (embodiment one).But the waste liquid to quenching is collected separately.After repeating three quenchings, its concentration just rises to about in the of 1.20 by 1.08, can be used as the refractory material adhesive and uses.
Claims (4)
1. one kind to Ammonium Sulfite Method papermaking and alkaline process (NaOH, CaO) papermaking wastewater (or the sediment in the waste liquid) carries out the blanket method that resource conversion is administered, its essential characteristic is that the waste liquid (or the sediment in the waste liquid) that paper industry is produced adds an amount of organic discarded object (as straw by using, shell, skin, in the organic waste matter that brewing industry grocery trade fruits processing industry is produced one or more) and/or an amount of inanimate matter (as quick lime, clay, in the bentonite one or more) after method at first makes waste liquid be converted into plastic state, pass through an one of following technology again or all waste liquid and added additive be converted into industrial and agricultural production and civilian needed several raw material or energy resources:
● forming processes: make it have certain shape (such as being brick shape) and performance (such as being not made of salt),, evaporate a large amount of free waters, save the energy consumption of retort process so that carry out air dry;
● formed article is carried out air dry and/or artificial drying;
● the formed article through super-dry is carried out destructive distillation handle;
● gather water vapour that produces in the retort process and the fuel gas that equates substantially with pyrolysis temperature, and to the sensible heat resource that it had is organized formed article is carried out drying and reaches UTILIZATION OF VESIDUAL HEAT IN in dry kiln, can be used as energy resources through cooling, the fuel gas that purifies and use;
● a large amount of physics sensible heat resources that solid product had that are in scorching hot state through the formed article after the destructive distillation are carried out UTILIZATION OF VESIDUAL HEAT IN, and it utilizes mode to be to use spent pulping liquor that it is carried out wet quenching;
● added with C and institute that effective ingredient is the solid product of key component in inanimate matter material and the waste liquid after the quenching, can not be satisfied as the desired quality requirements of commodity at product or because of it, perhaps for recycle to increase wherein C and/or Na
+Content can be used as a new round and produces needed additive and reuse, and continues to make waste liquid to change plastic state into, when the solid product after quenching meets the demands, enters next flow process as production marketing or as intermediate products;
● will be added in inanimate matter material and the waste liquid effective Na with C and institute after the quenching
+Composition is the solid product of key component, leaches NaOH and alkali leachable SiO with the method that adds water extraction
2
● will leach the back resulting is the solid product of key component with C, is processed into the carbon element product.
2. carry out the improvement method of resource conversion according to the said papermaking wastewater of claim 1 (or the sediment in the waste liquid), it is characterized in that for the time being waste liquid that paper industry is produced by with adding inanimate matter material such as quick lime with pulping with ammonium sulfite method, clay, in the bentonite one or more and/or organic material such as straw, shell, skin, after in the organic waste matter that brewing industry grocery trade fruits processing industry is produced one or more at first make it to become and can carry out the plastic of compression forming, and then use the technological process of forming by following operation to carry out resource processing;
● forming processes: make it have certain shape (such as being brick shape) and performance (such as being not made of salt),, evaporate a large amount of free waters, save the energy consumption of retort process so that carry out air dry;
● formed article is carried out air dry and/or artificial drying;
● the formed article through super-dry is carried out destructive distillation handle;
● gather water vapour that produces in the retort process and the fuel gas that equates substantially with pyrolysis temperature, and to the sensible heat resource that it had is organized formed article is carried out drying and reaches UTILIZATION OF VESIDUAL HEAT IN in dry kiln, can be used as energy resources through cooling, the fuel gas that purifies and use;
● a large amount of physics sensible heat resources that solid product had that are in scorching hot state through the formed article after the destructive distillation are carried out UTILIZATION OF VESIDUAL HEAT IN, and it utilizes mode to be to use spent pulping liquor that it is carried out wet quenching;
● after the quenching with C and added that effective ingredient is the solid product of key component in inanimate matter material and the waste liquid, at product or because it can not satisfy as the desired quality requirements of commodity, perhaps for recycle to increase wherein C content, can be used as a new round produces needed additive and reuses, continue to make waste liquid to change plastic state into, when the solid product after quenching meets the demands, enter next flow process as production marketing or as intermediate products;
● with resulting be the solid product of key component with C, be processed into the carbon element product.
3. carry out the improvement method of resource conversion according to the said papermaking wastewater of claim 1 (or the sediment in the waste liquid), it is characterized in that for the time being waste liquid that paper industry is produced by with adding inanimate matter material such as quick lime with the NaOH soda pulping process, clay, in the bentonite one or more and/or organic material such as straw, shell, skin, in the organic waste matter that brewing industry grocery trade fruits processing industry is produced one or more at first make it to become can carry out compression forming plastic after, and then use the technological process of forming by following operation to carry out resource processing:
● forming processes: make it have certain shape (such as being brick shape) and performance (such as being not made of salt),, evaporate a large amount of free waters, save the energy consumption of retort process so that carry out air dry;
● formed article is carried out air dry and/or artificial drying;
● the formed article through super-dry is carried out destructive distillation handle;
● gather water vapour that produces in the retort process and the fuel gas that equates substantially with pyrolysis temperature, and to the sensible heat resource that it had is organized formed article is carried out drying and reaches UTILIZATION OF VESIDUAL HEAT IN in dry kiln, can be used as energy resources through cooling, the fuel gas that purifies and use;
● a large amount of physics sensible heat resources that solid product had that are in scorching hot state through the formed article after the destructive distillation are carried out UTILIZATION OF VESIDUAL HEAT IN, and it utilizes mode to be to use spent pulping liquor that it is carried out wet quenching;
● added with C and institute that effective ingredient is the solid product of key component in inanimate matter material and the waste liquid after the quenching, can not be satisfied as the desired quality requirements of commodity at product or because of it, perhaps for recycle to increase wherein C and/or Na
+Content can be used as a new round and produces needed additive and reuse, and continues to make waste liquid to change plastic state into, when the solid product after quenching meets the demands, enters next flow process as production marketing or as intermediate products;
● will be added in inanimate matter material and the waste liquid effective Na with C and institute after the quenching
+Composition is the solid product of key component, leaches NaOH and alkali leachable SiO with the method that adds water extraction
2
● will leach the back resulting is the solid product of key component with C, is processed into the carbon element product.
4. carry out the improvement method of resource conversion according to the said papermaking wastewater of claim 1 (or the sediment in the waste liquid), it is characterized in that for the time it being that solid sediment in the waste liquid that paper industry is produced is by with adding inanimate matter material such as quick lime with the CaO soda pulping process, clay, in the bentonite one or more and/or organic material such as straw, shell, skin, in the organic waste matter that brewing industry grocery trade fruits processing industry is produced one or more at first make it to become can carry out compression forming plastic after, and then use the technological process of forming by following operation to carry out resource processing:
● forming processes: make it have certain shape (such as being brick shape) and performance (such as being not made of salt),, evaporate a large amount of free waters, save the energy consumption of retort process so that carry out air dry;
● formed article is carried out air dry and/or artificial drying;
● the formed article through super-dry is carried out destructive distillation handle;
● gather water vapour that produces in the retort process and the fuel gas that equates substantially with pyrolysis temperature, and to the sensible heat resource that it had is organized formed article is carried out drying and reaches UTILIZATION OF VESIDUAL HEAT IN in dry kiln, can be used as energy resources through cooling, the fuel gas that purifies and use;
● a large amount of physics sensible heat resources that solid product had that are in scorching hot state through the formed article after the destructive distillation are carried out UTILIZATION OF VESIDUAL HEAT IN, and it utilizes mode to be to use the sediment that is paste body shape in the spent pulping liquor that it is carried out wet quenching;
● after the quenching with C and added that effective ingredient is the solid product of key component in inanimate matter material and the waste liquid, at product or because it can not satisfy as the desired quality requirements of commodity, perhaps for recycle to increase wherein C content, can be used as a new round produces needed additive and reuses, continue to make the sediment that is paste body shape in the waste liquid to change plastic state into, when the solid product after quenching meets the demands, enter next flow process as production marketing or as intermediate products;
● with resulting be the solid product of key component with C, be processed into the carbon element product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101314925B (en) * | 2008-04-18 | 2011-04-20 | 中国科学院武汉岩土力学研究所 | Method of producing stalk composite fiber material for road |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314925B (en) * | 2008-04-18 | 2011-04-20 | 中国科学院武汉岩土力学研究所 | Method of producing stalk composite fiber material for road |
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