CN104004866A - Leather preparing technology capable of periodically filtering circulating wastewater - Google Patents
Leather preparing technology capable of periodically filtering circulating wastewater Download PDFInfo
- Publication number
- CN104004866A CN104004866A CN201410248488.XA CN201410248488A CN104004866A CN 104004866 A CN104004866 A CN 104004866A CN 201410248488 A CN201410248488 A CN 201410248488A CN 104004866 A CN104004866 A CN 104004866A
- Authority
- CN
- China
- Prior art keywords
- waste water
- circulation
- collect
- skin
- days
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides a leather preparing technology capable of periodically filtering circulating wastewater. The technology is characterized by comprising the following steps: in the leather preparing step, recycling wastewater to collect wastewater after the steps for circulation in the next batch; and filtering wastes after a period of time or number of times. Complex processes such as filtration and residue filtration are canceled, so that not only is the labor intensity of workers alleviated, but also the operating cost is lowered. Meanwhile, generation of wastes is reduced, and the performance indexes of the product produced meet the requirements.
Description
Technical field
The present invention relates to leather industry waste water circulation recycling field.
Background technology
In process hides process, waste water circulation technology realizes, but the treating processes of waste water is comparatively complicated, causes technology stability poor, filters frequently as still needed, filter residue supervisor, and these programs have not only increased workman's labour intensity, and running cost is high.
Summary of the invention
Object of the present invention: realize a kind of tanning technology of periodic filtering recycling waste water, substantially solved a difficult problem for process hides process environmental pollution, and the product property indices of producing thus all reaches requirement.
Technical scheme of the present invention is as follows:
A tanning technology for periodic filtering recycling waste water, is characterized in that all process steps proceed step by step waste water circulation recycling from soaking to dyeing, and comprises following operation:
Soaking process, step is as follows: collect the waste water after each soaking process finishes, be placed on by soaking drum or paddle-tumble; For the immersion of lower batch of skin; Waste water stirs before using, and circulation 15-60 time or 15-70 days needs filter useless solid thing.
Liming operation, step is as follows: collect the waste water after each liming operation finishes, be placed on by liming rotary drum or paddle-tumble; For the liming of lower batch of skin; Waste water stirs before using, filter hair in liming process; Circulation 15-60 time or 15-70 days needs filter useless solid thing.
Multiple ash process, step is as follows: collect the waste water after each ash process again finishes, be placed on by multiple grey rotary drum or paddle-tumble; For the multiple ash of lower batch of skin; Waste water stirs before using; Circulation 25-70 time or 25-80 days needs filter useless solid thing.
Deashing and softening operation, step is as follows: collect the waste water after each deashing and softening operation finishes, be placed on by deashing and softening rotary drum; For the deashing and softening of lower batch of skin; Waste water stirs before using; Circulation 15-60 time or 15-70 days needs filter useless solid thing.
Pickling, tanning operation, step is as follows: collect the waste water after each pickling, tanning operation finishes, be placed on by pickling, tanning rotary drum; For the pickling, tanning of lower batch of skin; Waste water stirs before using; Circulation 15-60 time or 15-70 days needs filter useless solid thing.
Retanning procedures, step is as follows: collect the waste water after each retanning procedures finishes, be placed on by retanning rotary drum; For the retanning of lower batch of skin; Waste water stirs before using; Circulation 15-60 time or 15-70 days needs filter useless solid thing.
In and operation, step is as follows: collect each in and the waste water of operation after finishing, in being placed on and by rotary drum; For the neutralization of lower batch of skin; Waste water stirs before using; Circulation 15-60 time or 15-70 days needs filter useless solid thing.
Dyeing process, step is as follows: collect the waste water after each dyeing process finishes, be placed on by dyeing drum; For the dyeing of lower batch of skin; Waste water stirs before using; Circulation 20-60 time or 20-70 days needs filter useless solid thing.
The useless solid thing of above-mentioned filtration uses the equipment that aperture is 1mm-5mm to carry out, as filter screen; Collected waste water fully recovering, when waste water is not enough, uses fresh water to supplement.
Initial waste water used in the present invention comes from respectively traditional immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, neutralization and dyeing process, and the formation situation of various waste water is well known by persons skilled in the art; In general, in immersion waste water, contain immersion agent, NaCl, Na2CO3, grease-removing agent, grease and degradation production thereof, hair, keratin protein, Saliva Orthana, meat, blood etc., wherein, generally, in waste water, residual grease-removing agent content is generally the 15%-30% of initial content, in waste water, residual immersion agent content is generally the 15%-25% of initial content, and in waste water, residual Na2CO3 content is generally the 30%-50% of initial content; In liming, multiple grey waste water, contain grease and degradation production, salt, lime, liming agent, S2-, OH-, Na+, Ca2+, protein and degradation production, enzyme and amine substance etc., wherein, generally, in waste water, residual lime is generally the 37%-55% of initial content, and Na2S content residual in liming waste water is generally 2.4g/l-3.2g/l; In deashing and softening waste water, contain protein and degradation production thereof, deliming agent, grease-removing agent, grease and degradation production thereof, enzyme and ammonium salt, amine substance etc., wherein in waste water, residual enzyme content is generally the 30%-50% of initial content, and in waste water, residual amounts of ammonium salt is generally the 30%-40% of initial content; In Chrome Tanning Wastewater, contain Cr3+, Cl-, SO42-, protein and degradation production thereof, grease and degradation production thereof etc., wherein in waste water, residual Cr3+ is generally 2.8g/l-3.2g/l, Cl-is generally 7g/l-15g/l, and in waste water, residual acid group content is generally the 30%-45% of initial content; In retanning waste water, contain Na+, Cr3+ and organic tanning agent etc.; In and waste water in contain neutral salt etc.; In dyeing process, used the chemical materials such as fatting agent, the organic dyeing auxiliaries of dye well, except a part is absorbed, the overwhelming majority enters in waste water, and these pollutents all belong to larger molecular organics, and concentration is high, but biodegradation rate is very slow.If various waste water discharges arbitrarily above, not only environment is caused to great pollution, and can produce the great wasting of resources.
The present invention has following beneficial effect:
The present invention has realized a kind of tanning technology of periodic filtering recycling waste water, and can recycle by iterative cycles, sewage effluent hardly, save complicated filtration, filter residue supervisor, not only alleviate workman's labour intensity, and reduced running cost, and having reduced the generation of useless solid thing simultaneously, the product property indices of production all reaches requirement.
Brief description of the drawings
Accompanying drawing 1 is the schematic flow sheet of a kind of tanning technology of periodic filtering recycling waste water according to the present invention.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is further described.
Embodiment
In soaking process, immersion waste water enters immersion wastewater disposal basin, stirs, then be input to soaking drum by lye pump, the technique of utilizing immersion waste water to soak is: with raw hide weighing scale, and 150% immersion waste water, 0.3% sterilant, turn 30 minutes, 0.6% Soaking, 0.25% grease-removing agent, 0.5% soda ash, turn 30 minutes/stop 0.1% Na 30 minutes
2s, turns 30 minutes/stop 30 minutes, turns and stops in conjunction with carrying out 3 times; Then often turn 10 minutes/stop 50 minutes, spend the night; Immersion finishes waste water and enters wastewater disposal basin; Then carry out next process.
In liming operation, liming waste water enters liming wastewater disposal basin, stirs, and is then input to liming rotary drum by lye pump, utilize liming waste water to carry out liming technique to be: with raw hide weighing scale, 70% spent lime liquor, 1.0% liming agent, 1.0% lime, 0.2% Sodium sulfhydrate, turns 30 minutes/stop 30 minutes; 0.6% Sodium sulfhydrate, turns 40 minutes; Start filter hair; 30% spent lime liquor, 0.5% liming agent, 0.6% sodium sulphite, 0.8% lime, turns 20 minutes/stop 20 minutes, turns and stops in conjunction with three times; 0.6% sodium sulphite, 0.6% lime, 0.1% grease-removing agent, turns 20 minutes/stop 20 minutes, turns and stops in conjunction with twice; 50% spent lime liquor, 0.4% lime, turns 20 minutes; Turn 10 minutes/stop 50 minutes, spend the night; Liming finishes waste water and enters wastewater disposal basin; Graywall is carried out to fleshing split, then carry out next process.
In multiple ash process, multiple grey waste water enters multiple grey wastewater disposal basin, stirs, then be input to multiple grey rotary drum by lye pump, the multiple grey waste water of utilization carries out multiple grey technique and is: with raw hide weighing scale, and 100% multiple grey waste water, 0.9% lime, 0.25% sodium sulphite, 0.5% auxiliary liming agent, turns 20 minutes/stop 20 minutes, then often turns 8 minutes/stop 52 minutes, turn and stop, in conjunction with carrying out 5 times, spending the night; Multiple ash finishes waste water and enters wastewater disposal basin.Multiple ash finishes waste water and enters wastewater disposal basin; Graywall is carried out to fleshing split, then carry out next process.
In deashing and softening operation, deashing and softening waste water enters deashing and softening wastewater disposal basin, stir, then be input to deashing and softening rotary drum by acid and alkali-proof pump, the technique of utilizing waste water to carry out deashing and softening is: with graywall weighing scale, and 80% deashing and softening waste water, 1.2% deliming agent, 0.5% ammonium sulfate, turns 50 minutes; 0.25% macerating enzyme, 0.15% grease-removing agent, turns 20 minutes; Deashing and softening finishes waste water and enters wastewater disposal basin; Deashing and softening finishes waste water and enters wastewater disposal basin; Then carry out next process.
In pickling, tanning operation, the technique of utilizing waste water to carry out pickling, tanning is: with the weighing scale of graywall, deashing and softening finish discharge opeing control dry after, add 0.25% mould inhibitor, 0.5% formic acid, turn 10 minutes, then by acid proof pump, the 50% pickling, tanning waste water of having lowered the temperature through sulphur acid for adjusting pH value to 0.7 is pumped into pickling, tanning rotary drum simultaneously, turns 90 minutes; 0.6% sodium formiate, turns 30 minutes; 2.2% chromium powder, turns 30 minutes; 1.5% chromium powder, turns 90 minutes; 0.2% carries alkaline agent, and 40% pickling, tanning waste water is warming up to 32 DEG C and turns 1 hour; 0.25% carries alkaline agent, turns 2 hours, and 60% pickling, tanning waste water is warming up to 37 DEG C and turns 4 hours; Tanning operation finishes, and collects pickling, tanning waste water to wastewater disposal basin, and blue skin goes out drum.Then carry out next process.
In retanning procedures, retanning waste water enters retanning wastewater disposal basin, stirs, and is then input to retanning rotary drum by acid and alkali-proof pump, and the technique of utilizing waste water to carry out retanning is: with the weighing scale of shaving leather, and 100% retanning waste water, 0.2% formic acid, turns 10 minutes; 1.0% alkanoic, 1.0% fatting agent, turns 30 minutes; 3.0% chromium powder, 2.0% chromium tannin, turns 60 minutes; 50% waste liquid, 32 DEG C of temperature, turn 15 minutes; 1.0% sodium formiate, turns 15 minutes; 0.5% sodium bicarbonate, turns 60 minutes, stops drum and spends the night, and pH value requires 3.5-4.5; Waste water enters wastewater disposal basin, then carries out next process.
In and in operation, in and waste water enter in and wastewater disposal basin, stir, in being then input to by acid and alkali-proof pump and rotary drum, utilize the technique that waste water neutralizes to be: with shaving leather weighing scale, in 200% and waste water, temperature is adjusted to 32 DEG C, in 1.5% and tannin, 1.5% sodium-acetate, turns 20 minutes; 0.5% sodium bicarbonate, turns 60 minutes, requires: pH value 4.5-5.5; Neutralization finishes waste water and enters wastewater disposal basin; Then carry out next process.
In dyeing process, dyeing waste-water enters dyeing waste-water pond, stirs, then be input to dyeing drum by acid and alkali-proof pump, utilize the technique that waste water dyes to be: with shaving leather weighing scale, 80% dyeing waste-water, temperature is adjusted to 30 DEG C, and 1.5% compound fatting agent, turns 20 minutes; 4.0% double focusing cyanamide retanning agent, 1.5% wattle extract, 2.0% sulphiting vegetables oil, turns 40 minutes; 2.0% dyestuff, 0.5% dispersion agent, turns 60 minutes; 2.5% acrylic acid double tanning agent, turns 30 minutes; Waste filling liquid 120%, 1.2% sodium bicarbonate, temperature 45 C, turns 10 minutes; 1.0% formic acid, turns 30 minutes; Dyeing finishes waste water and enters wastewater disposal basin; Then carry out next process.
In the situation that not departing from spirit of the present invention or substantive features, can implement the present invention with other form, with reference to claim but not above-mentioned specification sheets, as instruction scope of the present invention.
Claims (2)
1. a tanning technology for periodic filtering recycling waste water, is characterized in that in process hides operation, carrying out waste water circulation recycling, comprises following operation:
(1) soaking process, step is as follows: collect the waste water after each soaking process finishes, be placed on by soaking drum or paddle-tumble; For the immersion of lower batch of skin; Waste water stirs before using, and within circulation 15-60 time or 15-70 days, filters useless solid thing;
(2) liming operation, step is as follows: collect the waste water after each liming operation finishes, be placed on by liming rotary drum or paddle-tumble; For the liming of lower batch of skin; Waste water stirs before using, filter hair in liming process; Within circulation 15-60 time or 15-70 days, filter useless solid thing;
(3) multiple ash process, step is as follows: collect the waste water after each ash process again finishes, be placed on by multiple grey rotary drum or paddle-tumble; For the multiple ash of lower batch of skin; Waste water stirs before using; Within circulation 25-70 time or 25-80 days, filter useless solid thing;
(4) deashing and softening operation, step is as follows: collect the waste water after each deashing and softening operation finishes, be placed on by deashing and softening rotary drum; For the deashing and softening of lower batch of skin; Waste water stirs before using; Within circulation 15-60 time or 15-70 days, filter useless solid thing;
(5) pickling, tanning operation, step is as follows: collect the waste water after each pickling, tanning operation finishes, be placed on by pickling, tanning rotary drum; For the pickling, tanning of lower batch of skin; Waste water stirs before using; Within circulation 15-60 time or 15-70 days, filter useless solid thing;
(6) retanning procedures, step is as follows: collect the waste water after each retanning procedures finishes, be placed on by retanning rotary drum; For the retanning of lower batch of skin; Waste water stirs before using; Within circulation 15-60 time or 15-70 days, filter useless solid thing;
(7) in and operation, step is as follows: collect each in and the waste water of operation after finishing, in being placed on and by rotary drum; For the neutralization of lower batch of skin; Waste water stirs before using; Within circulation 15-60 time or 15-70 days, filter useless solid thing;
(8) dyeing process, step is as follows: collect the waste water after each dyeing process finishes, be placed on by dyeing drum; For the dyeing of lower batch of skin; Waste water stirs before using; Within circulation 20-60 time or 20-70 days, filter useless solid thing.
2. leather-making technology according to claim 1, is characterized in that filtering useless solid thing and uses the equipment that aperture is 1mm-5mm to carry out; Collected waste water fully recovering, when waste water is not enough, uses fresh water to supplement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248488.XA CN104004866A (en) | 2014-06-06 | 2014-06-06 | Leather preparing technology capable of periodically filtering circulating wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248488.XA CN104004866A (en) | 2014-06-06 | 2014-06-06 | Leather preparing technology capable of periodically filtering circulating wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104004866A true CN104004866A (en) | 2014-08-27 |
Family
ID=51365772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410248488.XA Pending CN104004866A (en) | 2014-06-06 | 2014-06-06 | Leather preparing technology capable of periodically filtering circulating wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104004866A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988251A (en) * | 2015-07-03 | 2015-10-21 | 西藏自治区拉萨皮革有限责任公司 | Method for directly recycling vegetable tanning waste liquor |
| CN106755625A (en) * | 2015-11-25 | 2017-05-31 | 张壮斗 | The technology of skin is done using waste liquid |
| US10260115B2 (en) | 2014-03-20 | 2019-04-16 | Zhuangdou Zhang | Leather production using waste liquids |
| US10501336B2 (en) | 2013-12-04 | 2019-12-10 | Zhuangdou Zhang | Tannery process with effluent recycling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423875A (en) * | 2008-10-21 | 2009-05-06 | 温州大学 | Process technology for recycling and reuse waste chrome liquor in retanning |
| CN102505057A (en) * | 2011-10-21 | 2012-06-20 | 中国皮革和制鞋工业研究院 | Cyclic utilization method of chrome tanning waste liquid |
| CN102534056A (en) * | 2010-12-14 | 2012-07-04 | 张壮斗 | Tanning production process capable of recycling waste water repeatedly from soaking to dyeing |
| CN103663765A (en) * | 2012-08-30 | 2014-03-26 | 浙江中辉皮草有限公司 | Treatment method of recycling fur chromium retanning liquid for plurality of times |
-
2014
- 2014-06-06 CN CN201410248488.XA patent/CN104004866A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423875A (en) * | 2008-10-21 | 2009-05-06 | 温州大学 | Process technology for recycling and reuse waste chrome liquor in retanning |
| CN102534056A (en) * | 2010-12-14 | 2012-07-04 | 张壮斗 | Tanning production process capable of recycling waste water repeatedly from soaking to dyeing |
| CN102505057A (en) * | 2011-10-21 | 2012-06-20 | 中国皮革和制鞋工业研究院 | Cyclic utilization method of chrome tanning waste liquid |
| CN103663765A (en) * | 2012-08-30 | 2014-03-26 | 浙江中辉皮草有限公司 | Treatment method of recycling fur chromium retanning liquid for plurality of times |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10501336B2 (en) | 2013-12-04 | 2019-12-10 | Zhuangdou Zhang | Tannery process with effluent recycling |
| US11040890B2 (en) | 2013-12-04 | 2021-06-22 | Zhuangdou Zhang | Tannery process with effluent recycling |
| US10260115B2 (en) | 2014-03-20 | 2019-04-16 | Zhuangdou Zhang | Leather production using waste liquids |
| CN104988251A (en) * | 2015-07-03 | 2015-10-21 | 西藏自治区拉萨皮革有限责任公司 | Method for directly recycling vegetable tanning waste liquor |
| CN104988251B (en) * | 2015-07-03 | 2018-01-09 | 西藏自治区拉萨皮革有限责任公司 | A kind of method that vegetable tanning waste liquid direct circulation utilizes |
| CN106755625A (en) * | 2015-11-25 | 2017-05-31 | 张壮斗 | The technology of skin is done using waste liquid |
| EP3173492A1 (en) * | 2015-11-25 | 2017-05-31 | Zhang, Zhuangdou | Leather production using waste liquids |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102534056B (en) | Tanning production process capable of recycling waste water repeatedly from soaking to dyeing | |
| US11040890B2 (en) | Tannery process with effluent recycling | |
| Rao et al. | Recouping the wastewater: a way forward for cleaner leather processing | |
| CN103060488B (en) | Environment-friendly type crust leather production method | |
| CN101921881B (en) | Novel process for recycling waste leather-making liquid step by step | |
| EP3045548B1 (en) | Chromium tanning process with reduced waste discharge | |
| CN104004866A (en) | Leather preparing technology capable of periodically filtering circulating wastewater | |
| CN104673943A (en) | Method for manufacturing environment-friendly ecological tanned lamb skin | |
| CN106145530B (en) | Method suede nitre dye wastewater treatment and recycled | |
| CN102534055A (en) | Ashless (or less-ash) liming unhairing process by recycling waste lime liquor indefinitely | |
| AU2015271965B2 (en) | Tannery process with effluent recycling | |
| CN104694675A (en) | Novel process for manufacturing leather with simple procedures and equipment | |
| CN111575417B (en) | Water-saving processing technology for cow leather and wet blue leather | |
| CN104843807A (en) | Cycle engineering for realization of tanning waste water near-zero emission | |
| CN106755625A (en) | The technology of skin is done using waste liquid | |
| Awulachew | A review of pollution prevention technology in leather industry | |
| Sah | Greener approach to leather techniques | |
| CN103981298A (en) | Tanning technique for regularly filtering soaking circulating wastewater | |
| Chen et al. | Resourceful utilization of tannery wastewater | |
| CN103981297A (en) | Tanning technique for regularly filtering neutralizing circulating wastewater | |
| CN103981300A (en) | Tanning technique for regularly filtering deashing and softening circulating wastewater | |
| CN103966370A (en) | Tanning technology for periodically filtering liming circulating wastewater | |
| CN103981302A (en) | Tanning technique for regularly filtering retanning circulating wastewater | |
| CN103981299A (en) | Tanning technique for regularly filtering reashing circulating wastewater | |
| CN104005241A (en) | Tanning technique for filtering dyeing circulation wastewater at regular time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140827 |