CN201024111Y - Device for purifying and recovering polluted alkaline by mercerizing - Google Patents
Device for purifying and recovering polluted alkaline by mercerizing Download PDFInfo
- Publication number
- CN201024111Y CN201024111Y CNU200720200075XU CN200720200075U CN201024111Y CN 201024111 Y CN201024111 Y CN 201024111Y CN U200720200075X U CNU200720200075X U CN U200720200075XU CN 200720200075 U CN200720200075 U CN 200720200075U CN 201024111 Y CN201024111 Y CN 201024111Y
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- alkali
- hollow
- silking
- filtration membrane
- dirty
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Abstract
The utility model discloses a device to purify and recover silkete dirty alkali through an ultrafiltration film, comprises a dirty alkali collecting pond (1), and is characterized in that: a pre-filter (5) is connected behind the dirty alkali collecting pond (1) through a boosting pump (3), a hollow fiber ultrafiltration device (7) is connected behind the pre-filter (5) and connected with a dense alkali storage pond (8). The utility model has the advantages of small equipment, low investment, lower power consumption than evaporation system, and saving a great deal of cooling water. After pilot plant test in a laboratory and repeated trials of industrial application, recovered alkali liquor can meet the following requirements: clearness and transparency, greatly decreased color degree, turbidity lower than 1 NTU, being in accordance with silkete technique recovered requirements, most of polymeric substances, colloid, polymeric slurry material and dye being intercepted, and the recovery rate of the alkali liquor being more than 95%, greatly decreasing sewage production amount. The alkali liquor recovered through the method of the utility model can be reused in such techniques as silkete, kier, dying without influencing the product quality.
Description
Technical field:
The utility model relates to a kind of ultra-filtration membrane that adopts to the device that the silking dirt alkali in the printing and dyeing industry purifies and reclaims, and belongs to industrial dirty alkali recovery technology field.
Background technology:
Cotton after Britain Mercer discovery in 1844 is filtered with concentrated caustic 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 found on this basis as applying tension force during the course in 1889, stops its contraction and alkali cleaning is gone, just can produce silkiness gloss, produced real mercerization thus.Mercerization and equipment by this principle design still are widely used so far, have become textile industry and have improved the indispensable important means of cotton fibre quality.Consequent silking dirt alkali is strong basicity (containing about NaOH3%-35%), 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 reclaimed then wastes resource, in line meeting causes bigger pollution to environment.
Prior art normally adopts evaporating and concentrating process that silking dirt alkali 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 dirty alkali, 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 " secondary pollution ".Because material mostly is high density, high viscosity greatly, causes heat-transfer effect poor, the cooling water system water loss is huge and hot water reuse efficient is not high, has increased cost recovery greatly.And alkali reclaims evaporation section and has the serious difficult problem of fouling, needs about 50 days clear effects once at present, influences ordinary production.
Summary of the invention:
The purpose of this utility model is, a kind of device that adopts ultra-filtration membrane to purify and reclaim silking dirt alkali is provided.Be applicable to the purification and the recovery of dirty alkali behind the yarn-dyed fabric mercerising,, can satisfy the requirement of textile printing and dyeing industry recycling industries and clean production to overcome the defective that existing simple evaporating and concentrating process can not effectively separate impurity in the silking dirt alkali.
The technical solution of the utility model.Adopt ultra-filtration membrane to purify and reclaim the device of silking dirt alkali, comprise dirty alkali collecting tank (1), be connected with prefilter (5) in dirty alkali collecting tank (1) back by force (forcing) pump (3), prefilter (5) back connects hollow-fibre ultrafiltration device (7), and hollow-fibre ultrafiltration device (7) connects concentrated base storage pond (8).
Above-mentioned employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, and hollow-fibre ultrafiltration device (7) is gone up and connected intermediate storage tank (9), and intermediate storage tank (9) connects dirty alkali collecting tank (1).
Aforesaid employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, and prefilter (5) adopts mechanical filter and precise microfiltration device.
Aforesaid employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, and the average molecular weight cut-off of the hollow fiber ultrafiltration membrane that hollow-fibre ultrafiltration device (7) adopts is 1000～6000.
Aforesaid employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, and the average molecular weight cut-off of the hollow fiber ultrafiltration membrane that hollow-fibre ultrafiltration device (7) adopts is 1000～3000.
Aforesaid employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, and the material of hollow fiber ultrafiltration membrane adopts anti-alkaline modification polysulfones or modified poly (ether-sulfone).
Aforesaid employing ultra-filtration membrane purifies and reclaims the device of silking dirt alkali, is connected with tensimeter (6) on the hollow-fibre ultrafiltration device (7).
The utility model adopts hollow fiber ultrafiltration membrane that the mercerising soiling solution is carried out dirty alkali and reclaims, and the equipment of employing is little, and less investment is lower than vapo(u)rization system energy consumption, saves a large amount of cooling waters.Through laboratory pilot scale and industrial application repetition test, reclaim alkali lye and can reach following requirement: as clear as crystal, colourity reduces, turbidity＜1NTU, meet mercerization reuse requirement, fiber-like polymer substance, colloid, polymer substance, dyestuff are held back substantially in the soiling solution, the alkali lye rate of recovery is more than 95%, and the soiling solution generation significantly reduces.The alkali lye that reclaims through the utility model method can be back to technology such as mercerising, boiling-off again and not influence quality product.Particularly ultrafiltration purifying method of membrane filtration technique is as an emerging chemical separating unit process, demonstrated fabulous application prospect, adopt this technology that the silking dirt alkali that textile industry produces is reclaimed, the technological transformation and the production technique innovation of textile industry will be promoted, promote the applied research of new and high technology, will produce huge economy and society benefit in the traditional textile industry.
In order to realize the purpose of this utility model, the applicant carries out the material that the best is selected in following experiment when selecting the ultra-filtration membrane material for use, proves practicality of the present utility model.
Experiment 1: at of the requirement of this highly basic material (pH14) of mercerising alkali lye to ultra-filtration membrane, except the desired high-throughput of general filter membrane, high rejection, little compaction coefficient, also require mould material that alkaline stability is preferably arranged when feeding temperature is less than 50 ℃ under the concentrated base condition, existing multiple film material such as polysulfones (PS), polyacrylonitrile (PAN), polyethersulfone (PES), polyvinylidene difluoride (PVDF) (PVDF), polypropylene (PP) etc. are carried out alkali resistance test.Finally select for use modification polysulfones or modified poly (ether-sulfone) as the ultra-filtration membrane material.The ultra-filtration membrane performance index of making are:
Average rejection:＞95%
Membrane material is heat-resisting:＜50 ℃
The anti-pH:1-14 of membrane material
The no acicular pores in film surface, high-throughput, high rejection, little compaction coefficient, main raw material(s) mainly adopt import.
Experiment 2: similar to general pure water ultrafiltration, laboratory lab scale experiment shows that working pressure is bigger to the influence of mercerising alkali lye flux, under intake pressure P≤0.15MPa, mercerising alkali lye flux is directly proportional with working pressure, and increase with P, when P＞0.15MPa, it is mild that curve becomes, the increasing degree that is flux diminishes, this is because pressure rises to a certain degree, face is compacted, and the fenestra part is reduced because of extruding, and long-play might make fenestra not recover and lose high-throughput, suitably pressure boost helps improving filtration production efficiency on the one hand, the pressure raising can make mould real on the other hand, intensity variation and cause film to damage is moved between 0.08～0.16MPa in the operating pressure of determining film on the experimental basis, can guarantee that mercerising alkali lye flux remains on 60～105L/m
2.h.
Experiment 3: commerical test is on the basis of pilot scale, and selecting average molecular weight cut-off for use is 1000～3000 hollow fiber ultrafiltration films, and film device is 2.0m by 4 effective film areas
2Assembly form, under 0.08～0.16MPa working pressure, move, the tap water flux is 350L/m during the test membrane assembly
2.h, mercerising alkali lye flux is about 75L/m during 30 ℃ of stable reflux operations
2.h
Embodiment 4: this device is through continuous six months circular flow, hollow fiber uf membrane system does not find that the swelling fracture of film causes the phenomenon of revealing and shell, it is stable that the water production rate of membrane module keeps, the ultrafiltration module that ABS plastic shell and Resins, epoxy are made can be used safely under less than 40 ℃ of conditions at feeding temperature, and the ultrafiltration module of stainless steel casing can use below 70 ℃, and the entire treatment system that comprises assembly and additional pipe fitting is in the fabulous heat resistance of performance below 50 ℃.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Embodiment:
Embodiment of the present utility model.Adopt ultra-filtration membrane to purify and reclaim the device of silking dirt alkali, produce dirty alkali collecting tank 1 in existing mercerizing tange 10 back, collect the soiling solution of mercerizing tange 10, connect a cover prefilter 5 in dirty alkali collecting tank 1 back by force (forcing) pump 3, install valve 2 respectively at force (forcing) pump 3 two ends, prefilter 5 backs connect hollow-fibre ultrafiltration device 7, and hollow-fibre ultrafiltration device 7 connects the concentrated base storage pond 8 that is used to collect alkali lye, and concentrated base storage pond 8 can be located at underground.Hollow-fibre ultrafiltration device 7 carries out filtering device for adopting hollow fiber ultrafiltration membrane, its ultra-filtration membrane and device all can be made according to prior art and obtain, for the strong basicity soiling solution behind the suitable recovery mercerizing tange 10 yarn-dyed fabric mercerisings, the hollow fiber ultrafiltration membrane material adopts anti-alkaline modification polysulfones or modified poly (ether-sulfone), and the average molecular weight cut-off of ultra-filtration membrane is 1000～6000.In order to obtain better filter effect, hollow-fibre ultrafiltration device 7 adoptable molecular weight cut-offs are 1000～3000.
Connect intermediate storage tank 9 on hollow-fibre ultrafiltration device 7, can collect and reclaim the later soiling solution of alkali lye, intermediate storage tank 9 connects dirty alkali collecting tank 1, can reclaim once more, increases the rate of recovery of alkali lye.
Between hollow-fibre ultrafiltration device 7 and prefilter 5 and intermediate storage tank 9, be connected the upward pressure table respectively, the import and export operating pressure that can show hollow-fibre ultrafiltration device 7, determine that the operating pressure of ultra-filtration membrane moves between 0.08～0.16MPa, can guarantee that mercerising alkali lye flux remains on 60～105L/m
2.h.
Prefilter 5 adopts mechanical filter and precise microfiltration device, by the existing market buying, the impurity of fiber impurity in the soiling solution and some macromolecules can be removed.The flow of force (forcing) pump 3 can be regulated and control to the pipeline 11 of connecting band valve between dirty alkali collecting tank 1 and prefilter 5.
Working process: the high basicity silking dirt alkali that enterprise produces spins in certain family, contain 15-25% sodium hydroxide, temperature height (7080 ℃), be mingled with polymer substance, Pollutant levels and the viscosity height of a large amount of fibers, dyestuff and degraded, contain impurity such as a large amount of fiber flcos, dyestuff, slurry, white dyes in the soiling solution.Enter dirty alkali collecting tank 1 with collecting after the soiling solution precooling of yarn-dyed fabric after carrying out mercerising on the mercerizing tange 10, the impurity of removing fiber impurity and some macromolecules is earlier handled in pre-filtering through prefilter 5, again by hollow-fibre ultrafiltration device 7, ultra-filtration membrane in the hollow-fibre ultrafiltration device 7 can be held back most of pollutent, flow along the ultra-filtration membrane surface is tangential through pre-filtered soiling solution, the alkali solute tangential flow that is trapped is crossed the ultra-filtration membrane surface, form spissated alkali lye and discharge, make the alkali lye in the soiling solution obtain reclaiming, send in the concentrated base storage pond 8, soiling solution behind the recovery alkali lye is sent into intermediate storage tank 9, intermediate storage tank 9 connects dirty alkali collecting tank 1, can reclaim once more, soiling solution is fully used, increase the rate of recovery of alkali lye.
The alkali lye that reclaims reaches following requirement: as clear as crystal, no fiber-like polymer, colourity reduces, turbidity＜1NTU, meets mercerization reuse requirement, and fiber-like goods and materials, colloid, polymer substance, dyestuff are held back substantially in the soiling solution, the alkali lye rate of recovery is more than 95%, and the soiling solution generation significantly reduces.Reclaiming alkali lye can be back to technology such as mercerising, boiling-off, dyeing again and not influence quality product.
Claims (6)
1. device that adopts ultra-filtration membrane to purify and reclaim silking dirt alkali, comprise dirty alkali collecting tank (1), it is characterized in that: be connected with prefilter (5) by force (forcing) pump (3) in dirty alkali collecting tank (1) back, prefilter (5) back connects hollow-fibre ultrafiltration device (7), and hollow-fibre ultrafiltration device (7) connects concentrated base storage pond (8).
2. employing ultra-filtration membrane according to claim 1 purifies and reclaim the device of silking dirt alkali, it is characterized in that: hollow-fibre ultrafiltration device (7) is gone up and is connected intermediate storage tank (9), and intermediate storage tank (9) connects dirty alkali collecting tank (1).
3. employing ultra-filtration membrane according to claim 1 and 2 purifies and reclaim the device of silking dirt alkali, it is characterized in that: prefilter (5) adopts mechanical filter and precise microfiltration device.
4. employing ultra-filtration membrane according to claim 3 purifies and reclaim the device of silking dirt alkali, it is characterized in that: the average molecular weight cut-off of the hollow fiber ultrafiltration membrane that hollow-fibre ultrafiltration device (7) adopts is 1000～6000
5. employing ultra-filtration membrane according to claim 4 purifies and reclaim the device of silking dirt alkali, it is characterized in that: the average molecular weight cut-off of the hollow fiber ultrafiltration membrane that hollow-fibre ultrafiltration device (7) adopts is 1000～3000
6. employing ultra-filtration membrane according to claim 5 purifies and reclaims the device of silking dirt alkali, and it is characterized in that: the material of hollow fiber ultrafiltration membrane adopts anti-alkaline modification polysulfones or modified poly (ether-sulfone).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720200075XU CN201024111Y (en) | 2007-02-14 | 2007-02-14 | Device for purifying and recovering polluted alkaline by mercerizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720200075XU CN201024111Y (en) | 2007-02-14 | 2007-02-14 | Device for purifying and recovering polluted alkaline by mercerizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201024111Y true CN201024111Y (en) | 2008-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720200075XU Expired - Lifetime CN201024111Y (en) | 2007-02-14 | 2007-02-14 | Device for purifying and recovering polluted alkaline by mercerizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201024111Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616890A (en) * | 2010-12-28 | 2012-08-01 | 青岛即发集团股份有限公司 | Method for recovering softener and water from dyeing and finishing softening wastewater |
| 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 |
-
2007
- 2007-02-14 CN CNU200720200075XU patent/CN201024111Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616890A (en) * | 2010-12-28 | 2012-08-01 | 青岛即发集团股份有限公司 | Method for recovering softener and water from dyeing and finishing softening wastewater |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG DONGYANG ENVIRONMENTAL ENGINEERING CO., L Free format text: FORMER NAME: HUZHOU DONGYANG WATER TREATMENT APPARATUS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 313017 Huan Shan Road, Huzhou City, Zhejiang Province Patentee after: Zhejiang Dongyang Environmental Engineering Co., Ltd. Address before: 313017 Huzhou City, Huzhou province and Zhejiang Development Zone, Huan Shan Road, Dongyang water treatment equipment Co., Ltd. Patentee before: Huzhou Dongyang Water Treatment Apparatus Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080220 |