CN101549912A - Mercerized waste alkali recovery process and system thereof - Google Patents
Mercerized waste alkali recovery process and system thereof Download PDFInfo
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- CN101549912A CN101549912A CNA2008103052750A CN200810305275A CN101549912A CN 101549912 A CN101549912 A CN 101549912A CN A2008103052750 A CNA2008103052750 A CN A2008103052750A CN 200810305275 A CN200810305275 A CN 200810305275A CN 101549912 A CN101549912 A CN 101549912A
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Abstract
The invention provides a process for purifying and recovering mercerized waste alkali in the jean mercerization printing and dyeing industry by adopting an ultrafiltration membrane and a nanofiltration membrane, comprising the steps of filtration in a prefilter first and filtering recovery by using an ultrafiltration device; and the process for recovering mercerized waste alkali is characterized by further comprising the steps: the waste alkali is processed by a nanofiltration device after being processed by the ultrafiltration device. The invention further provides a system for recovering mercerized waste alkali by a membrane method. The invention has the beneficial effects of simple process flow, good processing effect, and improving the reusing rate of the waste alkali.
Description
Technical field
The present invention relates to a kind of recovery technology of industrial alkali waste, relate in particular to a kind of technology that adopts ultra-filtration membrane and nanofiltration membrane that the mercerized waste alkali in cowboy's mercerising printing and dyeing industry is purified and reclaims.
The invention still further relates to a kind of embrane method and reclaim the mercerized waste alkali system, the invention belongs to industrial alkali waste recovery technology field.
Background technology
Mercerization is with sodium hydroxide solution the yarn and the fabric of textile or high cotton content to be handled to increase the technology of its surface luster.Cotton after Britain Mercer discovery concentrated caustic filtered in 1984 deflation, translucent, powerful enhancement and dyeing occur and increases many phenomenons that are of value to raising cotton quality such as dark, has applied for first mercerising patent.Lowe in 1889 finds to stop its contraction and alkali cleaning is gone as applying tension force during the course on this basis, just can produce silkiness gloss, produces real mercerization thus.Mercerization and equipment by this principle design still are widely used so far, have become textile industry and have improved cotton fine indispensable important means.Consequent mercerized waste alkali is strong basicity (containing about NaOH 3%-35%), and wherein colourity, COD and ss suspended solid value are all higher, impurity component is more, comprise fiber, dyestuff, chemical sizwe, permeate agent, white dyes, inorganic salt etc., if not recycled then wastes resource, directly the discharging meeting causes bigger pollution to environment.And cowboy's mercerization is complicated owing to the dyestuff that adopts, and it is higher to handle recovery difficult.
Prior art normally adopts evaporating and concentrating process that salkali waste is reclaimed.Owing to have only moisture to be removed from alkali lye in the evaporative process that reclaims, other that are produced in the dirt in the salkali waste, dyestuff, fiber and sizing material remnants and the fabric pre-treatment add chemical substance etc. and can remain in the alkali lye of recovery; Impurity fiber in the residual alkali lye of contaminated mercerising is difficult to separate; Color and luster, TSS, COD, salinity are difficult to remove, and the final residuum amount is big, easily causes Man Laos Yin Fu.As shown in Figure 2, the salkali waste of the discharging of cowboy's mercerising printing and dyeing workshop enters salkali waste collecting tank 1 by pipeline 7, salkali waste in the collecting tank 1 is through force (forcing) pump 2 pressurizations, enter into hollow fiber uf membrane system 4 after removing bigger suspended substance by prefilter 3, hollow fiber uf membrane system 4 is removed most of coloured dyestuff and tiny fiber etc., and the alkali lye by ultra-filtration equipment enters alkali reuse tank 5 to treat reuse by pipeline 11.The ultra-filtration equipment concentrated base enters the middle pond 6 of salkali waste by pipeline 10, and middle pond 6 salkali waste can be back to salkali waste collecting tank 2, also can be discharged to Waste Water Treatment by pipeline 13.
Chinese patent application 200610049886.4 is utilized the physics screening characteristics of hollow-fibre membrane, the method that adopts immersion to extract is separated waste lye, remove the pollutent in the waste lye, stir waste liquid and hollow-fibre membrane by air-blowing, form cross flow filter, use washing composition or clear water that hollow-fibre membrane is carried out back flushing, remove from inside to outside, recover membrane flux attached to the lip-deep pollutent of film.But this technology also has very big deficiency, and ultrafiltration can not all be removed the dye molecule in the salkali waste, if effect can not guarantee the feasibility of the reuse that certainly will influence.
Chinese patent application 200710200213.9 adopts ultra-filtration membrane to purify and reclaims silking dirt alkali.This technology can effectively reduce suspended substance and the colourity in the salkali waste, and is fine for the treatment effect of general mercerized waste alkali, but be used for cowboy's mercerized waste alkali, and the treatment effect of this technology just descends a lot, and it is green that the salkali waste of handling out is, the requirement that does not reach direct reuse.
Chinese patent application 200710009485.0 provides a kind of alkali waste water treatment process based on membrane technique, this method is carried out pre-treatment to alkali waste water earlier, then pre-treatment filtrate is pumped into the membrane filtration separation system and carry out membrane sepn, get film dialyzate and concentrated solution, film dialyzate direct reuse is to production process, and concentrated solution carries out conventional neutralizing treatment.The circulation that focuses on adopting the reverse osmosis membrane filtration system to carry out alkali lye of this technology is reclaimed, and cost of investment and system's operation are all higher.
(NF is a kind of pressure drive membrane sepn process between reverse osmosis and ultrafiltration Nanofiltration), and the pore diameter range of nanofiltration membrane is about several nanometers in nanofiltration.Compare with other pressure-driven type membrane sepn processes, occur later.Its appearance can be traced back to the research of the N S-300 film of J.E.Cadotte at the end of the seventies, and afterwards, nanofiltration develops very soon, and film group device is in the mid-80 commercialization.Nanofiltration membrane is mostly from the reverse osmosis membrane derivation, as CA, CTA film, aromatic polyamide composite membrane and sulfonated polyether sulfone film etc.But compare with reverse osmosis, its working pressure is lower, so nanofiltration is known as " low pressure reverse osmosis " or " loose reverse osmosis " again.
Nanofiltration separation is as a novel membrane separation technique, and know-why is similar to mechanical grading.But the nanofiltration membrane body has electric charge.To be it still have higher desalting performance under low pressure very and molecular weight cut-off is the major reason that hundreds of films also can remove inorganic salt for this.
Summary of the invention
It is good that the present invention mainly provides a kind of recovering effect, and energy consumption is low, and the mercerized waste alkali that has improved treatment effect reclaims technology; Solve existing in prior technology salkali waste recovering effect, the unfavorable technical problem of treatment effect.
The present invention also provides a kind of investment energy consumption little simultaneously, and floor space is little, mercerized waste alkali recovery system simple in structure; The solution existing in prior technology is invested, energy consumption is big, the technical problem that floor space is big.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of recovery technology of mercerized waste alkali, at first will put into the salkali waste collecting tank through pretreated salkali waste, salkali waste in the salkali waste collecting tank by pipe connection on ultra-filtration equipment, carry out purifying treatment by ultra-filtration equipment, carry out after secondary-cleaned is handled salkali waste being recovered into the alkali lye pond for recovering through nanofiltration device again through the salkali waste after the purifying treatment.Find after research and testing, can effectively reduce and alleviate the stifled situation of dirt in ultrafiltration and the nanofiltration device in the recovery technology of salkali waste of the present invention, save the working hour, increase work efficiency.Increased by one the nanofiltration operation thereafter, the nanofiltration operation can still have higher desalting performance and molecular weight cut-off under the low pressure very much, remove colored component and some other impurity remaining in the alkali lye, improve the treatment effect and the recovering effect of salkali waste, made the availability of the alkali lye after reclaiming obtain to improve.Ultrafiltration technology step and nanofiltration technique step combine with the various impurity in the salkali waste and coloured dyestuff etc. remove more thorough, make the salkali waste rate of recovery after treatment improve.
As preferably, after described pretreated alkali waste water is through pre-filtering technology, enter ultra-filtration equipment again and carry out purifying treatment, remove a large amount of fiber substances and the bigger impurity of other volumes in the salkali waste through pre-filtering.Can remove big impurity earlier through pre-filtering technology, make the filter effect of post-order process improve, the convenient organic efficiency that improves.
As preferably, described pre-treatment be will by the workshop directly the salkali waste of discharging be discharged in the salkali waste collecting tank through behind the concentration and evaporation, pretreated salkali waste concentration is more than 200g/L.It is relatively poor that nanofiltration process is lower than 200 rejection to organics to univalent ion and molecular weight, and divalence or polyvalent ion and the organism of molecular weight between 200～500 there is higher decreasing ratio, based on this characteristic elder generation process preprocessing process, can improve the recovering effect of nanofiltration technique step so that in nanofiltration process.
As preferably, the purification of described ultra-filtration equipment adopts hollow fiber ultrafiltration membrane to purify, the material of described hollow fiber ultrafiltration membrane is polysulfones of anti-alkaline the or polyethersulfone, and the average molecular weight cut-off of hollow fiber ultrafiltration membrane is 2000 dalton-6000 dalton.It is 1-14 that polysulfones or polyethersulfone hollow fiber ultrafiltration membrane can tolerate the pH scope, and ultra-filtration equipment is removed the most of coloured dyestuff in the salkali waste, fiber substance and the bigger impurity of some other volume that some are tiny; The salkali waste that has passed through ultra-filtration equipment enters the nanofiltration membrane device, and unsanctioned salkali waste comes back to the salkali waste collecting tank and carries out secondary recovery.
As preferably, the nanofiltration membrane that described nanofiltration device adopts is high pressure resistant, anti-alkaline rolling composite membrane, nanofiltration device is removed colored component and some other impurity remaining in the salkali waste, salkali waste by nanofiltration membrane enters into the salkali waste pond for recovering, and the salkali waste by nanofiltration membrane does not come back to the salkali waste collecting tank and carries out secondary recovery.
Increased a process that circulation is reclaimed like this, improved quality, can improve the rate of recovery simultaneously, reclaimed repeatedly till salkali waste reaches recuperable requirement through the salkali waste after the recovery technology.
A kind of mercerized waste alkali recovery system comprises and utilizes the interconnective salkali waste collecting tank of pipeline, force (forcing) pump, ultra-filtration equipment and alkali reuse tank successively, and by the pipe connection nanofiltration device, described nanofiltration device is connecting the alkali reuse tank behind described ultra-filtration equipment.Recovery technology corresponding to mercerized waste alkali has increased nanofiltration device behind ultra-filtration equipment, be used to finish the rate of recovery that nanofiltration technique improves salkali waste.Simultaneously, device of the present invention adopts the ultra-filtration equipment of hollow fiber ultrafiltration membrane and the nanofiltration device of high pressure resistant, anti-alkaline rolling composite membrane, invests relatively lowly, and treatment effect is good.
As preferably, between described force (forcing) pump and described ultra-filtration equipment, be provided with prefilter, described pre-filtering is to adopt mechanical filter or precise microfiltration device.
As preferably, described ultra-filtration equipment is a hollow fiber uf membrane system; The salkali waste collecting tank is connected by pipeline with force (forcing) pump, force (forcing) pump links to each other with prefilter by pipeline, prefilter links to each other with hollow fiber uf membrane system by pipeline, hollow fiber uf membrane system both by pipe connection to ultrafiltration alkali pond, be connected with pond in the middle of the salkali waste by pipeline again simultaneously, pipeline is passed through in the pond in the middle of the salkali waste, connect salkali waste collecting tank and Waste Water Treatment respectively, high-pressure pump is arrived by pipe connection in ultrafiltration alkali pond, high-pressure pump connects nanofiltration device, nanofiltration device both arrives the force (forcing) pump front end by pipe connection, arrives the alkali reuse tank by pipe connection simultaneously.Increase nanofiltration device, made decontamination effect improving better, improved the rate of recovery of salkali waste.Can not get back to the force (forcing) pump front end by the salkali waste of ultra-filtration equipment, the system that reenters reclaims technology once more, the salkali waste by nanofiltration device can not reclaim technology again yet equally, increased the rate of recovery like this, directly get back to the force (forcing) pump front end by pipeline, relatively simple for structure, be convenient to dismounting, easy to assembly, do not influence the running of original system pipeline yet.
Therefore, mercerized waste alkali of the present invention reclaims technology and system has following advantage: after removing most of dyestuff composition in the salkali waste with hollow-fibre ultrafiltration device, with remaining a small amount of dyestuff composition in the nanofiltration device elimination salkali waste.The combined process of ultrafiltration operation and nanofiltration operation makes technology of the present invention compare with traditional method of evaporation, has reduced energy consumption, has strengthened treatment effect; Compare with current isolated ultrafiltration, improved treatment effect, increased the salkali waste rate of recovery; In technology of the present invention, the salkali waste that can't pass ultra-filtration equipment and nanofiltration device all is back to the recovery of carrying out before the force (forcing) pump once more, has improved recovering effect.The present invention simultaneously has compact construction, structural manufacturing process is simple relatively, can effectively remove the various colored components in cowboy's dyeing mercerizing salkali waste, and can select the rate of recovery of salkali waste according to the requirement of handling flexibly, this cover system dismounting, easy to assembly can repeated multiple times be used.
Description of drawings:
Fig. 1 is the system schematic that mercerized waste alkali of the present invention reclaims.
Fig. 2 is a kind of recovery mercerized waste alkali system schematic of prior art.
Embodiment:
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure 1, a kind of mercerized waste alkali reclaims technology, comprise and to carry out pre-filtering earlier through the pretreated salkali waste of concentration and evaporation, salkali waste after the pre-filtering is carried out the ultra-filtration operation through ultra-filtration equipment, passed through entering nanofiltration device after the ultra-filtration operation and carry out the nanofiltration operation, the alkali lye that has passed through after the nanofiltration operation enters in the alkali pond for recovering.
A kind of mercerized waste alkali recovery system, the salkali waste of the discharging of cowboy's mercerising printing and dyeing workshop (concentration is about 50g/L) is discharged into salkali waste collecting tank 1 through after the pre-treatment of concentration and evaporation by pipeline 10, the concentration of salkali waste is greater than 200g/L at this moment, salkali waste collecting tank 1 is connected with force (forcing) pump 2 by pipeline 11, lifting through force (forcing) pump 2 enters into prefilter 3 by pipeline 12, pre-filtrating equipment is to adopt mechanical filter, prefilter 3 enters into ultra-filtration equipment 4 by pipeline 13 after removing the bigger impurity of fiber substances a large amount of in the salkali waste and other volumes, the polysulfone hollow fibre of anti-alkaline ultra-filtration membrane is adopted in the purification of ultra-filtration equipment, its average molecular weight cut-off is 2000 dalton-6000 dalton, ultra-filtration equipment 4 is removed most of coloured dyestuff, fiber substance that some are tiny and the bigger impurity of some other volume, alkali lye by ultra-filtration equipment enters ultrafiltration alkali pond 6 by pipeline 14,6 alkali lye links to each other with high-pressure pump 7 through piping 18 in the ultrafiltration alkali pond, supercharging through high-pressure pump 7 enters nanofiltration device 8 by pipeline 19, the nanofiltration membrane that nanofiltration device adopts is high pressure resistant, anti-alkaline rolling composite membrane, nanofiltration device 8 is discharged to alkali lye pond for recovering 9 by pipeline 20 after removing colored component remaining in the alkali lye and some other impurity, alkali lye in the alkali pond for recovering 9 is produced machine by pipeline 22 and mercerising and is linked to each other, and alkali lye can be directly as mercerising production.Fail in the ultra-filtration equipment 4 to be discharged to the middle pond 5 of salkali waste by the alkali lye of ultra-filtration membrane by pipeline 15, the salkali waste in pond can be back to collecting tank 1 by pipeline 16 and also can be discharged into Waste Water Treatment by pipeline 17 in the middle of the salkali waste.The reclamation rate of salkali waste can be controlled by the valve on ultrafiltration flow and the pipeline 16.Fail in the nanofiltration device 8 to be back to topping-up pump 2 front ends by pipeline 21 by the alkali lye of nanofiltration membrane.
The effect comparison of table 1 purification of the present invention and recovery technology and prior art (shown in the accompanying drawing 2)
| Parameter | Salkali waste stoste | Embodiment | Comparative Examples |
| Turbidity (NTU) | 200-2000 | ＜0.1 | ＜0.2 |
| Colourity (doubly) | 1000-20000 | ＜5 | ＜81 |
| Form | Brown | Faint yellow | Green |
| Reclaim concentration of lye (g/L) | 200 | 200 | 200 |
| The rate of recovery (%) | - | ＞95 | ＞95 |
The present invention is through constantly lab scale and pilot scale, all can reach good treatment effect, the fiber substance in the salkali waste, colloid, polymer substance, dyestuff are trapped substantially and remove, and the concentration that reclaims alkali lye reaches 200g/L, the salkali waste reclamation rate can reach more than 95%, and dirty alkali generation significantly reduces.Reclaim alkali lye can be back to mercerising again, boil wash, technology such as dyeing and do not influence product quality.
Claims (9)
1. the recovery technology of a mercerized waste alkali, it is characterized in that: at first will put into the salkali waste collecting tank through pretreated salkali waste, salkali waste in the salkali waste collecting tank by pipe connection on ultra-filtration equipment, carry out purifying treatment by ultra-filtration equipment, carry out after secondary-cleaned is handled salkali waste being recovered into the alkali lye pond for recovering through nanofiltration device again through the salkali waste after the purifying treatment.
2. the recovery technology of mercerized waste alkali according to claim 1, it is characterized in that: after described pretreated alkali waste water is through pre-filtering technology, enter ultra-filtration equipment again and carry out purifying treatment, remove a large amount of fiber substances and the bigger impurity of other volumes in the salkali waste through pre-filtering.
3. the recovery technology of mercerized waste alkali according to claim 1 and 2 is characterized in that: described pre-treatment is that salkali waste is discharged in the salkali waste collecting tank through behind the concentration and evaporation, and pretreated salkali waste concentration is more than 200g/L.
4. the recovery technology of mercerized waste alkali according to claim 1 and 2, it is characterized in that: described ultrafiltration purifies adopts hollow fiber ultrafiltration membrane to purify, and the ultrafiltration cleaning section is removed the most of coloured dyestuff in the salkali waste, fiber substance and the bigger impurity of some other volume that some are tiny; The salkali waste that has passed through after ultrafiltration purifies enters the nanofiltration membrane operation, and unsanctioned salkali waste comes back to the salkali waste collecting tank and carries out secondary recovery.
5. the recovery technology of mercerized waste alkali according to claim 4, it is characterized in that: the material of described hollow fiber ultrafiltration membrane is polysulfones of anti-alkaline the or polyethersulfone, the average molecular weight cut-off of hollow fiber ultrafiltration membrane is 2000 dalton-6000 dalton.
6. the recovery technology of mercerized waste alkali according to claim 1 and 2, it is characterized in that: the nanofiltration membrane that described nanofiltration device adopts is high pressure resistant, anti-alkaline rolling composite membrane, the nanofiltration operation is removed colored component and some other impurity remaining in the salkali waste, salkali waste by nanofiltration membrane enters into the salkali waste pond for recovering, and the salkali waste by nanofiltration membrane does not come back to the salkali waste collecting tank and carries out secondary recovery.
7. the recovery system of a mercerized waste alkali, comprise and utilize the interconnective salkali waste collecting tank of pipeline (1), force (forcing) pump (2), ultra-filtration equipment and alkali reuse tank (9) successively, it is characterized in that: by pipe connection nanofiltration device (8), described nanofiltration device (8) is connecting alkali reuse tank (9) behind described ultra-filtration equipment.
8. the recovery system of mercerized waste alkali according to claim 7 is characterized in that: be provided with prefilter between described force (forcing) pump and described ultra-filtration equipment, described pre-filtrating equipment is to adopt mechanical filter or precise microfiltration device.
9. according to the recovery system of claim 7 or 8 described mercerized waste alkalis, it is characterized in that: described ultra-filtration equipment is a hollow fiber uf membrane system; Salkali waste collecting tank (1) is connected by pipeline (11) with force (forcing) pump (2), force (forcing) pump (2) links to each other with prefilter (3) by pipeline (12), prefilter (3) links to each other with hollow fiber uf membrane system (4) by pipeline (13), hollow fiber uf membrane system (4) both was connected to ultrafiltration alkali pond (6) by pipeline (14), be connected with pond (5) in the middle of the salkali waste by pipeline (15) again simultaneously, the pond is by pipeline (16) in the middle of the salkali waste, (17) connect salkali waste collecting tank (1) and Waste Water Treatment respectively, ultrafiltration alkali pond (6) is connected to high-pressure pump (7) by pipeline (18), high-pressure pump (7) connects nanofiltration device (8), nanofiltration device (8) both was connected to force (forcing) pump (2) front end by pipeline (21), was connected to alkali reuse tank (9) by pipeline (20) simultaneously.
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| CNA2008103052750A CN101549912A (en) | 2008-10-29 | 2008-10-29 | Mercerized waste alkali recovery process and system thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989318A (en) * | 2012-12-18 | 2013-03-27 | 江南大学 | Clean production process for treating mercerizing liquid alkali by PES (Polyether Sulfone) ultra-filtration membrane method |
| CN103387300A (en) * | 2013-07-23 | 2013-11-13 | 苏州英特工业水处理工程有限公司 | Recovery method using membranes for terephthalic acid and sodium hydroxide from printing and dyeing alkali-reduced waste water |
| CN103397405A (en) * | 2013-07-24 | 2013-11-20 | 宜宾海丝特纤维有限责任公司 | Pretreatment technique for recovering pressed liquor electrodialysis alkali in viscose fiber production |
| CN103408039A (en) * | 2013-08-28 | 2013-11-27 | 郑州中南杰特超硬材料有限公司 | Process and equipment for recycling alkali from cubic boron nitride synthesis tailings |
| CN103437102A (en) * | 2013-08-23 | 2013-12-11 | 无锡凝洋环保科技有限公司 | Mercerizing technology and device adopting liquid caustic soda ultrafiltration method |
| CN104140114A (en) * | 2014-08-01 | 2014-11-12 | 张家港化工机械股份有限公司 | Method for recycling residual alkali liquor in caustic soda and caustic soda flake concentration device |
| CN105525471A (en) * | 2016-01-26 | 2016-04-27 | 华纺股份有限公司 | Purification treatment method of concentrated alkali for mercerization pretreatment of textile |
| CN105565528A (en) * | 2015-12-23 | 2016-05-11 | 大连理工大学 | Mercerized light alkaline purification recovery method and apparatus |
| CN109534577A (en) * | 2018-12-25 | 2019-03-29 | 武汉艾科滤膜技术有限公司 | The method and apparatus of separated recycle waste lye via ultra-filtration film |
| CN109607877A (en) * | 2019-01-18 | 2019-04-12 | 天津工业大学 | A kind of purification method for spent lye of printing and dyeing |
| CN112939251A (en) * | 2021-01-26 | 2021-06-11 | 苏州融和福天宝环保科技有限责任公司 | Method for recovering alkali from electroplating degreasing waste liquid |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102989318A (en) * | 2012-12-18 | 2013-03-27 | 江南大学 | Clean production process for treating mercerizing liquid alkali by PES (Polyether Sulfone) ultra-filtration membrane method |
| CN103387300A (en) * | 2013-07-23 | 2013-11-13 | 苏州英特工业水处理工程有限公司 | Recovery method using membranes for terephthalic acid and sodium hydroxide from printing and dyeing alkali-reduced waste water |
| CN103397405A (en) * | 2013-07-24 | 2013-11-20 | 宜宾海丝特纤维有限责任公司 | Pretreatment technique for recovering pressed liquor electrodialysis alkali in viscose fiber production |
| CN103397405B (en) * | 2013-07-24 | 2015-07-01 | 宜宾海丝特纤维有限责任公司 | Pretreatment technique for recovering pressed liquor electrodialysis alkali in viscose fiber production |
| CN103437102A (en) * | 2013-08-23 | 2013-12-11 | 无锡凝洋环保科技有限公司 | Mercerizing technology and device adopting liquid caustic soda ultrafiltration method |
| CN103408039B (en) * | 2013-08-28 | 2014-12-10 | 郑州中南杰特超硬材料有限公司 | Process and equipment for recycling alkali from cubic boron nitride synthesis tailings |
| CN103408039A (en) * | 2013-08-28 | 2013-11-27 | 郑州中南杰特超硬材料有限公司 | Process and equipment for recycling alkali from cubic boron nitride synthesis tailings |
| CN104140114A (en) * | 2014-08-01 | 2014-11-12 | 张家港化工机械股份有限公司 | Method for recycling residual alkali liquor in caustic soda and caustic soda flake concentration device |
| CN104140114B (en) * | 2014-08-01 | 2016-01-13 | 苏州天沃科技股份有限公司 | The recovery method of residual alkali lye in caustic soda, sheet alkali concentrate apparatus |
| CN105565528A (en) * | 2015-12-23 | 2016-05-11 | 大连理工大学 | Mercerized light alkaline purification recovery method and apparatus |
| CN105525471A (en) * | 2016-01-26 | 2016-04-27 | 华纺股份有限公司 | Purification treatment method of concentrated alkali for mercerization pretreatment of textile |
| CN109534577A (en) * | 2018-12-25 | 2019-03-29 | 武汉艾科滤膜技术有限公司 | The method and apparatus of separated recycle waste lye via ultra-filtration film |
| CN109607877A (en) * | 2019-01-18 | 2019-04-12 | 天津工业大学 | A kind of purification method for spent lye of printing and dyeing |
| CN112939251A (en) * | 2021-01-26 | 2021-06-11 | 苏州融和福天宝环保科技有限责任公司 | Method for recovering alkali from electroplating degreasing waste liquid |
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Application publication date: 20091007 |