CN203507825U - New recovery system for recovering acid and alkali from viscose sodium sulfate waste liquid by bipolar membrane electrodialysis method - Google Patents
New recovery system for recovering acid and alkali from viscose sodium sulfate waste liquid by bipolar membrane electrodialysis method Download PDFInfo
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Abstract
The utility model discloses a new recovery system for recovering acid and alkali from viscose sodium sulfate waste liquid by a bipolar membrane electrodialysis method. The new recovery system comprises a bipolar membrane electrodialysis membrane module device, a sulfuric acid recovery pipeline, an alkali recovery pipeline, a pretreatment device, a reverse osmosis concentration device, an electrodialysis concentration device and a low-temperature multi-effect concentration device, wherein the pretreatment device is communicated with the bipolar membrane electrodialysis membrane module device; the bipolar membrane electrodialysis membrane module device is communicated with the reverse osmosis concentration device; the reverse osmosis concentration device is communicated with the electrodialysis concentration device; the electrodialysis concentration device is communicated with the low-temperature multi-effect concentration device; a sulfuric acid outlet end and an alkali outlet end of the low-temperature multi-effect concentration device are respectively communicated with the sulfuric acid recovery pipeline and the alkali recovery pipeline. The new recovery system has the beneficial technical effects of increasing the regeneration recovery rate of acid and alkali in the viscose waste liquid, reducing the damages of impurities in the waste liquid to the bipolar membrane, prolonging the service life of the bipolar membrane and ensuring the smoothness of bipolar membrane electrodialysis and subsequent procedures.
Description
Technical field
The utility model relates to the system that in a kind of Chemical Manufacture, material is processed, and more particularly, the utility model relates to a kind of viscose rayon sodium sulphate waste liquid and through bipolar membrane electrodialysis method, reclaims the new recovery system of soda acid, belongs to viscose rayon production technical field.
Background technology
In viscose rayon forming process in chemical fibre industry, viscose glue and acid coagulating bath effect, be neutralized alkali, and sodium cellulose xanghate is decomposed and regeneration cellulose hydrate, the cellulose sulfonate in this process in viscose glue, free NaOH and the Na generating because of side reaction
2cS
3, the side reaction product such as polysulfide all can with coagulating bath in sulfuric acid reaction generate sodium sulphate.Viscose rayon is produced and is comprised the acid bath operation that consumes sulfuric acid, also comprises the sheet steeping operation, alkali cellulose sulphonic acid ester dissolution process, waste gas absorption operation, concise operation and the sour water neutralisation treatment operation of compressing and washing that consume NaOH.
In coagulating bath the Main Function of sodium sulphate be impel viscose stream to solidify and suppress sulfolysis from, the reproduction speed of cellulose sulfonate is delayed, improve the concentration of sodium sulphate in coagulating bath, spinning operation is easier to, tow is difficult for broken end, and can reduce the degree of dissociation of sulfuric acid, make tow when leaving coagulating bath, still there is certain residual ester value, but the sodium sulphate in coagulating bath is also unsuitable too high, otherwise can make fiber solidify overruns, can not form fine structure, and generate thick crystalline particle, the ectonexine of fiber is heterogeneity also.
In spinning process, sodium sulphate content in coagulating bath constantly increases and makes it cannot meet the requirement of technique, if only will make the total amount of coagulating bath increase and cannot store to supplement its concentration recycling by adding the raw material being consumed in coagulating bath, can only be at regular time and quantity by coagulating bath discharge, acid wherein, salt, metal ion etc. will cause serious environmental pollution, to sewage disposal, bring huge pressure and cause the huge waste of resource.And sodium sulphate unnecessary in acid bath is carried out to high temperature crystallization, isolate sodium sulfate crystal, make the content of the sodium sulphate in acid bath meet technological requirement, the acid that do not need to drain every day carrys out balance acid bath, after reinforced, directly for spinning workshop, continue, can reduce acid discharge, output glauber salt, reduce environmental protection pressure, but make it can not produce economic benefit because impure many, own added values of glauber salt that in coagulating bath, sodium sulphate high temperature crystallization is produced are low, a large amount of solid salts cannot be processed, and still to environmental protection, has brought certain pressure.
Bipolar Membrane is a kind of novel ion-exchange composite membranes, and it is composited by cation exchange layer (N type film), interface hydrophilic layer (Catalytic Layer) and anion exchange layer (P type film) conventionally, is reaction film truly.Under DC electric field effect, Bipolar Membrane can, by hydrolytic dissociation, obtain respectively hydrogen ion and hydroxide ion in film both sides.Utilize this feature, the bipolar membrane electrodialysis system that Bipolar Membrane and other anion and cation exchange membranes are combined into can be converted into corresponding bronsted lowry acids and bases bronsted lowry by the salt in the aqueous solution in the situation that not introducing new component, and this technology is called bipolar membrane electrodialysis technology.Compare the outstanding technical advantage such as that bipolar membrane electrodialysis technology has is energy-efficient, environmental friendliness, simple operation with traditional handicraft.In recent years, bipolar membrane electrodialysis technology technology is all obtaining fast development aspect research and application two, membrane preparation technology and operation parameter optimization are constantly obtained new progress, range of application is from the albumen of the desalination of chemical field and soda acid preparation, biological field and the amino acid fields such as being extended to the purifying of industrial wastewater field of Environment Protection, concentrated, preparation of high-purity water of purifying, traditional chemical separating technique renovate, develop cleaner production and recycling economy process in playing the part of the role who becomes more and more important.
The research report of relevant Bipolar Membrane just occurred from 50 mid-nineties 90s of 20th century, its evolution can be divided into three phases: 50 initial stages age mid-nineties 90 to 80 of 20th century of first stage, this is that Bipolar Membrane develops period very slowly, Bipolar Membrane is only by two anion and cation exchange membrane direct pressings, poor performance, the theoretical pressure drop of water decomposition voltage ratio is high tens times, and application study is also in take water decomposition as basic laboratory stage; Second stage is from the 80's of 20th century first arrivals beginning of the nineties, due to the improvement of Bipolar Membrane technology of preparing, successfully developed monolithic type Bipolar Membrane, its performance improves greatly, in relieving haperacidity alkali and desulfur technology, having obtained successful Application, there is commodity Bipolar Membrane in this one-phase.From at the beginning of the 90's of 20th century so far, it is the period that Bipolar Membrane develops rapidly, along with the further investigation to Bipolar Membrane course of work mechanism, from membrane structure, membrane material and preparation process, carried out significant improvement, the performance of Bipolar Membrane is greatly improved, it is mainly wherein the improvement to cavity block and anode membrane contact interface, at the beginning of from initial simple " pressure stratotype " or " coating type " structure to the 80's of 20th century, start " monolithic type " structure occurring, occur again subsequently, with the labyrinth of middle " Catalytic Layer ", greatly reducing membrane voltage.
At present, bipolar membrane electrodialysis technology has been brought into play original effect in optimizing traditional industry process and new industrial process.Its appearance has changed traditional industry separation and preparation process, for the technical barrier solving in the fields such as environment, chemical industry, biology, marine chemical industry is brought new vigor and vitality into, for solving the problems such as environment, resource, the energy of facing mankind, provide effective means simultaneously.
It is CN102167293A that State Intellectual Property Office discloses a publication number in 2011.3.10, name is called the patent of invention of " a kind of method of using bipolar membrane electrodialysis device to produce sulfuric acid and NaOH ", a kind of method of using bipolar membrane electrodialysis device to produce sulfuric acid and NaOH is disclosed, the method is that metabisulfite solution is injected in the compartment of anion selective membrane and cation selective membrane formation, water is injected into Bipolar Membrane and anion selective membrane, in the compartment that cation selective membrane forms, under the effect of DC electric field power, at cation selective membrane and Bipolar Membrane, in the compartment of the anion selection face formation of anode and/or the compartment of cation selective membrane and negative electrode formation, obtain NaOH, in the compartment forming towards the cation selective face of negative electrode in anion selective membrane and Bipolar Membrane and/or the compartment of anion selective membrane and anodic formation, obtain sulfuric acid.The method that the present invention adopts can re-use sodium sulphate waste liquid, produces the sulfuric acid and the NaOH that can secondary utilize, and it is turned waste into wealth, and has significant economic benefit and environmental benefit.
Although above-mentioned patent can accomplish to dispose waste liquid; make acid-alkali regeneration; environment has been played to certain protection effect; but still exist the soda acid rate of recovery not high; energy consumption is large, cannot online recycling and recycle, and due to the pre-treatment step before entering film device not; can cause runner obstruction, film resistance increase, regenerated acid and alkali ability in film device to reduce, and service life of equipment is short.
It is CN102107972A that State Intellectual Property Office discloses a publication number in 2010.12.1, name is called the patent of invention of " a kind of seawater desalinization pretreatment method by using bipolar membrane through reverse osmosis process ", disclose a kind of chemical treatment method, specifically referred to a kind of to the front preprocess method in desalting process.The present invention puts into bipolar membrane device seawater, and Bipolar Membrane is wherein a divalence diffusion barrier; Utmost point liquid is sodium chloride or the metabisulfite solution of mass concentration 1-10%; Then the alkali lye in bipolar membrane device alkali chamber is mixed with water inlet, micro-filtrate membrane filtration the water inlet after above-mentioned alkalization with 0.1-0.5 micron, and then regulate pH by the acid solution of bipolar acid chamber, and regulate pH value to 8.2-8.8, can be used as desalinization and process use.Advantage of the present invention is Bipolar Membrane sea-water-desalination water producing hardening and tempering method and the technique that less investment, operating cost boron content low, easy to operate, that produce water meets drinking water standard, can carry out heavy construction application, solves the technical bottleneck of desalinization development.The present invention can be widely used in desalinization occasion.The disclosed content of this patent is not suitable for the sodium sulphate liquid waste processing producing in the viscose glue production process that contains complicated ingredient impurity.
Utility model content
The utility model is intended to solve the existing waste liquid that is applied to produce in viscose rayon strand forming process and reclaims through bipolar membrane electrodialysis method problem and the defect that soda acid technology exists, provide a kind of viscose rayon sodium sulphate waste liquid through bipolar membrane electrodialysis method, to reclaim the new recovery system of soda acid, only for the waste liquid that is applied to produce in viscose rayon strand forming process, through bipolar membrane electrodialysis legal system, get the system of soda acid, adopt specific recovery system to process the waste liquid producing in viscose rayon strand forming process, enter again bipolar membrane electrodialysis process, improved the regeneration rate of recovery of bronsted lowry acids and bases bronsted lowry in viscose rayon waste liquid, reduced the damage that waste liquid impurity causes Bipolar Membrane, improve the service life of Bipolar Membrane, and guarantee carrying out smoothly of bipolar membrane electrodialysis and subsequent handling.
In order to realize foregoing invention object, concrete technical scheme of the present utility model is as follows:
A kind of viscose rayon sodium sulphate waste liquid reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, comprise bipolar membrane electrodialysis film group device, retrieval of sulfuric acid pipeline and alkali recovery channel, it is characterized in that: also comprise pretreatment unit, reverse osmosis concentrated compression apparatus, electrodialysis enrichment facility and low-temperature multi-effect enrichment facility, described pretreatment unit is communicated with bipolar membrane electrodialysis film group device, described bipolar membrane electrodialysis film group device is communicated with reverse osmosis concentrated compression apparatus, reverse osmosis concentrated compression apparatus is communicated with electrodialysis enrichment facility, electrodialysis enrichment facility is communicated with low-temperature multi-effect enrichment facility, the going out sulfuric acid end and go out alkali end and be communicated with alkali recovery channel with retrieval of sulfuric acid pipeline respectively of described low-temperature multi-effect enrichment facility.
Described bipolar membrane electrodialysis film group device is provided with heat sink.
Described heat sink is heat exchanger, heat pump or compression refigerating machine.
The acid end that goes out of described acid recovery pipeline is communicated with sulfuric acid storage tank, and the alkali end that goes out of alkali recovery channel is communicated with alkali storage tank.
Described pretreatment unit comprises crystallization apparatus, PH adjusting device, plate filter I, the O connecting successively
3oxidation unit, plate filter II, active carbon adsorption column, Di and PP millipore filter, the output of described PP millipore filter is communicated with the input of the metabisulfite solution runner of bipolar membrane electrodialysis film group device.
In described PP millipore filter, the aperture of micropore filtering film is 0.22-1 micron.
The useful technique effect that the utility model brings:
1, the utility model is only got the system of soda acid for the waste liquid that is applied to produce in viscose rayon strand forming process through bipolar membrane electrodialysis legal system, adopt specific recovery system to process the waste liquid producing in viscose rayon strand forming process, enter again bipolar membrane electrodialysis process, improved the rate of recovery of acid, alkali and hemicellulose in viscose rayon waste liquid, reduced the damage that waste liquid causes Bipolar Membrane, improve the service life of Bipolar Membrane, and guarantee carrying out smoothly of bipolar membrane electrodialysis and subsequent handling, improved the organic efficiency of soda acid.
2, the new bipolar membrane electrodialysis film group device that adopts of this practicality is provided with heat sink, and heat sink is heat exchanger, heat pump or compression refigerating machine; Can lower the temperature to bipolar membrane electrodialysis film group device, facilitate the carrying out of follow-up matting.
3, the utility model adopts the acid end that of acid recovery pipeline to be communicated with sulfuric acid storage tank, and the alkali end that goes out of alkali recovery channel is communicated with alkali storage tank; Can store the soda acid after concentrated, easy to use.
4, the utility model adopts described pretreatment unit to comprise crystallization apparatus, PH adjusting device, plate filter I, the O connecting successively
3oxidation unit, plate filter II, active carbon adsorption column, Di and PP millipore filter, the output of described PP filter is communicated with the input of the metabisulfite solution runner of bipolar membrane electrodialysis film group device; In described PP millipore filter, the aperture of micropore filtering film is 0.22-1 micron; The waste liquid producing in viscose rayon strand forming process is processed, enter again bipolar membrane electrodialysis process, improved the regeneration rate of recovery of bronsted lowry acids and bases bronsted lowry in viscose rayon waste liquid, reduced the damage that waste liquid impurity causes Bipolar Membrane, improve the service life of Bipolar Membrane, and guarantee carrying out smoothly of bipolar membrane electrodialysis and subsequent handling.
5, the utility model adopts reverse osmosis concentrated compression apparatus, electrodialysis enrichment facility and low-temperature multi-effect enrichment facility to concentrate alkali successively, and when reclaiming the alkali lye that alkali concn control is 1%-30%, effect is remarkable, cost-saving, can directly reclaim.
accompanying drawing explanationfig. 1 is the utility model structural representation
In figure, be labeled as: 1, bipolar membrane electrodialysis film group device, 2, pretreatment unit, 3, reverse osmosis concentrated compression apparatus, 4, heat sink, 5, sulfuric acid storage tank, 6, alkali storage tank, 7, electrodialysis enrichment facility, 8, low-temperature multi-effect enrichment facility.
The specific embodiment
Below enforcement of the present utility model is illustrated:
A kind of viscose rayon sodium sulphate waste liquid reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, comprise bipolar membrane electrodialysis film group device 1, retrieval of sulfuric acid pipeline and alkali recovery channel, also comprise pretreatment unit 2, reverse osmosis concentrated compression apparatus 3, electrodialysis enrichment facility 7 and low-temperature multi-effect enrichment facility 8, described pretreatment unit 2 is communicated with bipolar membrane electrodialysis film group device 1, described bipolar membrane electrodialysis film group device 1 is communicated with reverse osmosis concentrated compression apparatus 3, reverse osmosis concentrated compression apparatus 3 is communicated with electrodialysis enrichment facility 7, electrodialysis enrichment facility 7 is communicated with low-temperature multi-effect enrichment facility 8, the going out sulfuric acid end and go out alkali end and be communicated with alkali recovery channel with retrieval of sulfuric acid pipeline respectively of described low-temperature multi-effect enrichment facility 8.
In the utility model, described bipolar membrane electrodialysis film group device 1 is provided with heat sink 4.
In the utility model, described heat sink 4 is heat exchanger.
In the utility model, the acid end that goes out of described acid recovery pipeline is communicated with sulfuric acid storage tank 5, and the alkali end that goes out of alkali recovery channel is communicated with alkali storage tank 6.
In the utility model, described pretreatment unit 2 comprises crystallization apparatus, PH adjusting device, plate filter I, the O connecting successively
3oxidation unit, plate filter II, active carbon adsorption column, Di and PP millipore filter, the output of described PP millipore filter is communicated with the input of the metabisulfite solution runner of bipolar membrane electrodialysis film group device.
In the utility model, in described PP millipore filter, the aperture of micropore filtering film is 0.22-1 micron.
The utility model is applied in a kind of viscose rayon sodium sulphate waste liquid that applicant applies for simultaneously and reclaims in the new technology of soda acid through bipolar membrane electrodialysis method, comprises the following steps successively: crystallization, regulate pH, prefiltration, O
3oxidation-reduction quality material, secondary prefiltration, active carbon are removed that organic matter, ion exchange resin are removed zinc ion, the filter of pp micro porous filtration essence, soda acid is produced and are concentrated;
Described crystallization by by viscose rayon strand forming process generation sodium sulphate content be 200g/L waste liquid generates sodium sulfate crystal by high temperature crystallization;
Described adjusting pH is for first dissolving sodium sulfate crystal with demineralized water, obtain concentration and be 3% metabisulfite solution, in metabisulfite solution, add sodium carbonate again, by pH modulation 8, add sodium carbonate the maximized precipitation of the zinc ion in metabisulfite solution can be easy to separation, allow the metabisulfite solution of the few zinc ion of content enter in bipolar membrane electrodialysis film group device, extend the service life of equipment, improved yield and the quality of product;
Described process adds the metabisulfite solution of sodium carbonate depositing zinc ion, through a prefiltration, i.e. and a plate filter, remove zinc ion sediment, allow comparatively pure metabisulfite solution enter in bipolar membrane electrodialysis film group device, extended the service life of equipment, improved the quality of product;
Described metabisulfite solution after a prefiltration, adopts O
3oxidizing process is removed the reducing substances of metabisulfite solution, allow comparatively pure metabisulfite solution enter in bipolar membrane electrodialysis film group device, avoided bipolar membrane electrodialysis equipment in the situation that of electrolysis, make the reduction of being reduced property of film substance oxidation and damage, extend the service life of equipment, improved the quality of product;
Described through O
3metabisulfite solution after oxidation removal reducing substances filters through secondary flame filter press, the large granular impurity that can effectively go out in metabisulfite solution, allow comparatively pure metabisulfite solution enter in bipolar membrane electrodialysis film group device, extend the service life of equipment, improved the quality of product;
Described metabisulfite solution after secondary prefiltration passes through activated-carbon device again, can effectively remove organic substance and some fine particles, avoid organic substance enrichment and affect the performance of film in the Bipolar Membrane equipment, extended the service life of equipment, improved yield and the quality of product;
Described metabisulfite solution after charcoal treatment, through ion exchange resin system, is removed the remaining zinc ion in solution, makes bivalent metal ion drop to minimum on the impact of bipolar membrane electrodialysis;
The described metabisulfite solution through ion exchange resin system through the filter of pp millipore filter essence, can obtain meeting the treatment fluid that enters bipolar membrane electrodialysis film group device index again;
Described soda acid produce for treatment fluid through bipolar membrane electrodialysis legal system obtain concentration control for the sulfuric acid solution of 1g/l and concentration control be the sodium hydroxide solution of 5g/l;
Described simmer down to is controlled concentration to concentrate for the sulfuric acid solution of 1g/l adopts hyperfiltration, electroosmose process and low-temperature multi-effect method successively; After concentrated, the sulfuric acid solution that concentration is 80g/l is transported to and in the acid bath operation that viscose rayon produces, carries out sulfuric acid and add, and forms online sulfuric acid circulation recycling system; Concentration is controlled and concentrated for the sodium hydroxide solution of 5g/l adopts hyperfiltration, electroosmose process and low-temperature multi-effect method successively; After hyperfiltration is concentrated, obtaining that concentration controls is 1% sodium hydroxide solution; After electroosmose process is concentrated, obtaining that concentration controls is 6% sodium hydroxide solution again, then after low-temperature multi-effect method is concentrated, to obtain that concentration controls be 15% sodium hydroxide solution; It is that 15% sodium hydroxide solution is transported to and in the sheet steeping operation that viscose rayon produces, carries out NaOH and add that concentration is controlled, and forms online alkali circulation recycling system.
In described treatment fluid, ss concentration is less than 5mg/l, and COD is less than 60mg/l, and zinc ion concentration is less than 5mg/l, and the temperature for the treatment of fluid is 5-35 ° of C.
In described crystallisation step, crystallization temperature is 40 ℃, and crystallization time is 30min, obtains 92% sodium sulfate crystal.
Described active carbon is removed in organic matter step, adopts corpuscular active carbon adsorption column.
In described pp micro porous filtration essence filter step, in PP filter, the aperture of micropore filtering film is 0.22 micron.
Flame filter press and PP filter are physical filtering, and flame filter press filters out a certain size large granular impurity and the suspension in metabisulfite solution, and PP filter filters out the material of the small radii in metabisulfite solution.
The utility model is applied in the method that a kind of bipolar membrane electrodialysis method that applicant applies for is simultaneously processed viscose rayon sodium sulphate waste liquid, the viscose rayon sodium sulphate waste liquid that is 5% by sodium sulfate concentration through crystallization, regulate pH, prefiltration, O
3oxidation-reduction quality material, secondary prefiltration, active carbon are removed organic matter, ion exchange resin is removed zinc ion and the filter of pp micro porous filtration essence, then enter in the sodium sulphate runner of bipolar membrane electrodialysis film group device; Demineralized water as absorption liquid enters respectively in the sour runner and alkali runner of bipolar membrane electrodialysis film group device, makes sulfuric acid solution and sodium hydroxide solution; The work gauge pressure of described bipolar membrane electrodialysis film group device is 0.03MPa.
The basement membrane of described Bipolar Membrane is to using the alloy firm of polyethylene and ethene and octene copolymer elastomer and Oppanol tertiary blending as basilar memebrane, immerse containing in the solution of styrene, divinylbenzene and benzoyl peroxide, the film that soaked liquid pressurizes again, and polymerization obtains under heating.
The thickness of described basement membrane is 0.05mm.
When concrete use, select BPM2-2500-3 type bipolar membrane electrodialysis device, comprising: 120V*150A D.C. regulated power supply, 400*800 bipolar membrane electrodialysis film group device (comprising resistance sorrel, resistance alkali film and Bipolar Membrane), reverse osmosis concentration equipment, the concentrated electrodialysis film group device of 400*800 acid, 400*800 alkali concentrated electrodialysis film group device, low-temperature multi-effect concentrator and heat pump; Adopt heat pump to the processing of lowering the temperature of bipolar membrane electrodialysis film group device, heat pump can recycle heat recovery to low-temperature multi-effect concentrator.
The cleaning step of bipolar membrane electrodialysis film group device comprises: 1, toward the sodium sulphate loop exit place of bipolar membrane electrodialysis film group device, pass into demineralized water bipolar membrane electrodialysis film group device is carried out to backwash to remove equipment runner and the less particle of Bipolar Membrane adhering on surface, till backwash is normal to operating pressure; 2, by temperature, be till 25 degree, the compound concentration sodium hydroxide solution that is 1% recovers to electric current Bipolar Membrane surface wash cycles.
Claims (6)
1. a viscose rayon sodium sulphate waste liquid reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, comprise bipolar membrane electrodialysis film group device (1), retrieval of sulfuric acid pipeline and alkali recovery channel, it is characterized in that: also comprise pretreatment unit (2), reverse osmosis concentrated compression apparatus (3), electrodialysis enrichment facility (7) and low-temperature multi-effect enrichment facility (8), described pretreatment unit (2) is communicated with bipolar membrane electrodialysis film group device (1), described bipolar membrane electrodialysis film group device (1) is communicated with reverse osmosis concentrated compression apparatus (3), reverse osmosis concentrated compression apparatus (3) is communicated with electrodialysis enrichment facility (7), electrodialysis enrichment facility (7) is communicated with low-temperature multi-effect enrichment facility (8), the going out sulfuric acid end and go out alkali end and be communicated with alkali recovery channel with retrieval of sulfuric acid pipeline respectively of described low-temperature multi-effect enrichment facility (8).
2. a kind of viscose rayon sodium sulphate waste liquid according to claim 1 reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, it is characterized in that: described bipolar membrane electrodialysis film group device (1) is provided with heat sink (4).
3. a kind of viscose rayon sodium sulphate waste liquid according to claim 2 reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, it is characterized in that: described heat sink (4) is heat exchanger, heat pump or compression refigerating machine.
4. a kind of viscose rayon sodium sulphate waste liquid according to claim 1 reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, it is characterized in that: the acid end that goes out of described acid recovery pipeline is communicated with sulfuric acid storage tank (5), and the alkali end that goes out of alkali recovery channel is communicated with alkali storage tank (6).
5. a kind of viscose rayon sodium sulphate waste liquid according to claim 1 reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, it is characterized in that: described pretreatment unit (2) comprises crystallization apparatus, PH adjusting device, plate filter I, the O connecting successively
3oxidation unit, plate filter II, active carbon adsorption column, Di and PP millipore filter, the output of described PP millipore filter is communicated with the input of the metabisulfite solution runner of bipolar membrane electrodialysis film group device.
6. a kind of viscose rayon sodium sulphate waste liquid according to claim 5 reclaims the new recovery system of soda acid through bipolar membrane electrodialysis method, it is characterized in that: in described PP millipore filter, the aperture of micropore filtering film is 0.22-1 micron.
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| CN201320441365.9U CN203507825U (en) | 2013-07-24 | 2013-07-24 | New recovery system for recovering acid and alkali from viscose sodium sulfate waste liquid by bipolar membrane electrodialysis method |
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| CN201320441365.9U CN203507825U (en) | 2013-07-24 | 2013-07-24 | New recovery system for recovering acid and alkali from viscose sodium sulfate waste liquid by bipolar membrane electrodialysis method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357511A (en) * | 2014-11-07 | 2015-02-18 | 宜宾雅泰生物科技有限公司 | Electrodialysis process for preparing feed-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor |
| CN106348508A (en) * | 2016-11-18 | 2017-01-25 | 广西大学 | Recycling device for chemical waste liquid |
| CN109336064A (en) * | 2018-11-06 | 2019-02-15 | 宜宾海丝特纤维有限责任公司 | A kind of viscose sodium sulfate waste liquor multi-level handling system |
-
2013
- 2013-07-24 CN CN201320441365.9U patent/CN203507825U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357511A (en) * | 2014-11-07 | 2015-02-18 | 宜宾雅泰生物科技有限公司 | Electrodialysis process for preparing feed-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor |
| CN106348508A (en) * | 2016-11-18 | 2017-01-25 | 广西大学 | Recycling device for chemical waste liquid |
| CN109336064A (en) * | 2018-11-06 | 2019-02-15 | 宜宾海丝特纤维有限责任公司 | A kind of viscose sodium sulfate waste liquor multi-level handling system |
| CN109336064B (en) * | 2018-11-06 | 2022-03-18 | 宜宾海丝特纤维有限责任公司 | Viscose fiber sodium sulfate waste liquid multistage processing system |
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