CN104843807A - Cycle engineering for realization of tanning waste water near-zero emission - Google Patents
Cycle engineering for realization of tanning waste water near-zero emission Download PDFInfo
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- CN104843807A CN104843807A CN201410051333.7A CN201410051333A CN104843807A CN 104843807 A CN104843807 A CN 104843807A CN 201410051333 A CN201410051333 A CN 201410051333A CN 104843807 A CN104843807 A CN 104843807A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/152—Water filtration
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- Environmental & Geological Engineering (AREA)
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Abstract
The present invention provides a cycle engineering for realization of tanning waste water near-zero emission, and is characterized in that: waste water recycling can be step by step and independently performed in the processes of pre-soaking, main-soaking, liming, reliming, deashing and softening, picking chrome tanning, retanning, neutralizing, and dyeing, and all wastewater in all the processes can be recycled. The technology is practically proved in actual production of tanning workshops of BIOSK (shangqiu) chemical co., LTD. According to the method, waste water recycling can be realized in processes of from pre-soaking to dyeing, the sewage discharge is greatly reduced, the tanning pollution problem is thoroughly solved, the quality of finished leather is guaranteed, the finished leather loose surface rate is effectively reduced, the compactness and fullness of the finished leather are improved, chemical material can be saved by 15%-55%, to be more specific, chromium powder can be saved by 35%-65%, part of the chemical material can be saved by more than 90%, and individualized chemical material can be saved by 100%.
Description
Technical field
The present invention relates to leather industry waste water circulation recycling field.
Background technology
In leather making process, adopt a large amount of industrial chemicals, as acid, alkali, salt, sulfide, lime, chrome tanning agent, fatting agent, dyestuff etc., wherein have quite a few to enter in waste water.Leather-making waste water mainly comes from preparation, tanning and other wet processing workshop sections.Account for more than 90% of total blowdown flow rate whole leather making process from pre-immersion to the blowdown flow rate of the production process of dyeing, its water quality characteristics is containing a large amount of complicated component and poisonous and harmful substances.Wherein containing a large amount of lime, salt, grease, ammonia nitriding compound, protein, sulfide, chromic salts, dyestuff, hairs, skin slag, silt etc., and COD, BOD are very high.Its pollutant kind is various, and the large and foul smelling phenomenon of water quality and quantity variation factor is the trade effluent compared with refractory reason.
Along with the development of green technology equipment, current leather-making waste water has formed the treatment process (seeing the following form) of comparative maturity.But its operational process often spend high, efficiency is low, weak effect cannot reach real pollution treatment object.
The minimizing, the saving of material, the reduction of production cost etc. of above-mentioned treatment process to quantity of wastewater effluent is all very limited.The disposable whole recycling of waste water from pre-immersion to dyeing all process steps is realized if want, but be an extremely complicated scabrous problem, and often with the appearance of following problem: graywall rate of body weight gain, blue skin yield of leather all decline 1.5%-3.5%, shrinkage temperature declines 1.5 DEG C-3.5 DEG C, blue skin grain also can be made impaired, and grain is thicker, darkens, even produce " hair side " phenomenon, cause some performance index of finished leather not reach requirement.
Summary of the invention
Object of the present invention: realize the waste water iterative cycles recycling from pre-immersion to dyeing all process steps, normal volatilization under removing state of nature and outside inevitably spilling, the rate of recovery of waste water can reach 100%, thoroughly solve a difficult problem for tanning sewage discharge, and the resultant Leather property indices produced thus all reaches requirement, and effectively reduce finished leather loose side rate, improve the degree of packing of finished leather, fullness ratio, and can realize saving material 15%-55%, as saved chromium powder 35%-65%, part material can realize saving more than 90%, indivedual material such as salt can realize saving 100%.
Technical scheme of the present invention is as follows:
A kind ofly realize the circulation engineering of leather-making waste water close to zero release, it is characterized in that pre-immersion, main immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, in and, also independently carry out waste water circulation recycling step by step in dyeing process, comprise the steps:
(1) pre-soaking process means of waste water reuse: this operation is the waste water after collecting each pre-soaking process terminates, and filters useless solid thing wherein, stirs, be placed on by pre-soaking drum or paddle-tumble; For the pre-immersion of lower batch of skin; Detect the microbe population in waste water, to determine the consumption of sterilant;
(2) soaking process means of waste water reuse: this operation is the waste water after collecting each soaking process terminates, overanxious useless solid thing wherein, stirs, is placed on by soaking drum or paddle-tumble; For the immersion of lower batch of skin; Detect the microbe population in waste water, to determine the consumption of sterilant;
(3) liming operation means of waste water reuse; This operation is the waste water after collecting each liming operation terminates, and filters useless solid thing wherein, stirs, be placed on by liming rotary drum or paddle-tumble; For the liming of lower batch of skin; Filter hair is required in liming process;
(4) multiple ash process means of waste water reuse; This operation is the waste water after collecting each ash process again terminates, and filters useless solid thing wherein, stirs, be placed on by multiple grey rotary drum or paddle-tumble; For the multiple ash of lower batch of skin;
(5) deashing and softening operation means of waste water reuse; This operation is the waste water after collecting each deashing and softening operation terminates, and filters useless solid thing wherein, stirs, be placed on by deashing and softening rotary drum; For the deashing and softening of lower batch of skin;
(6) pickling chrome tanning process means of waste water reuse; This operation is the waste water after collecting each pickling chrome tanning process terminates, and filters useless solid thing wherein, stirs, be placed on by pickling chrome tanning rotary drum; For the pickling chrome tanning of lower batch of skin;
(7) retanning procedures means of waste water reuse; This operation is the waste water after collecting each retanning procedures terminates, and filters useless solid thing wherein, stirs, be placed on by retanning rotary drum; For the retanning of lower batch of skin;
(8) with operation means of waste water reuse in; This operation be to collect each in and operation terminate after waste water, filter useless solid thing wherein, stir, in being placed on and by rotary drum; For the neutralization of lower batch of skin;
(9) dyeing process means of waste water reuse; This operation is the waste water after collecting each dyeing process terminates, and filters useless solid thing wherein, stirs, be placed on by dyeing drum; For the dyeing of lower batch of skin.
In above-mentioned steps, the equipment that aperture is 1mm-5mm is used to filter, as filter screen; After every procedure terminates, the normal volatilization under removing state of nature and outside inevitably spilling, collected waste water fully recovering, when waste water is not enough, uses fresh water supplementary.Every procedure waste water collection device all should be equipped with whipping appts, also can hand mixing; Skin after pre-immersion and liming carries out fleshing and split, and the waste water produced in fleshing and split process is collected into corresponding waste water collection device respectively in order to cycling and reutilization.Skin after pre-immersion, main immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, neutralization and dyeing process process removes conventional water wash step from; If washed, washing waste water is carried out cycling and reutilization; Acid should be added when the washing waste water of recycle graywall its pH value is adjusted between 5-12.
Initial waste used in the present invention comes from traditional pre-immersion, main immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, neutralization and dyeing process respectively, and the formation situation of various waste water is well known by persons skilled in the art; In general, containing immersion agent, NaCl, Na2CO3, grease-removing agent, grease and degradation production, hair, keratin protein, Saliva Orthana, meat, blood etc. in pre-immersion, main immersion waste water, wherein, generally, grease-removing agent content residual in waste water is generally the 15%-30% of initial content, immersion agent content residual in waste water is generally the 15%-25% of initial content, and Na2CO3 content residual in waste water is generally the 30%-50% of initial content; Containing grease and degradation production, salt, lime, liming agent, S2-, OH-, Na+, Ca2+, protein and degradation production, enzyme and amine substance etc. in liming, multiple grey waste water, wherein, generally, lime residual in waste water is generally the 37%-55% of initial content, and Na2S content residual in liming waste water is generally 2.4g/l-3.2g/l; Containing protein and degradation production, deliming agent, grease-removing agent, grease and degradation production thereof, enzyme and ammonium salt, amine substance etc. in deashing and softening waste water, wherein residual in waste water enzyme content is generally the 30%-50% of initial content, and amounts of ammonium salt residual in waste water is generally the 30%-40% of initial content; Containing Cr3+, Cl-, SO42-, protein and degradation production thereof, grease and degradation production thereof etc. in Chrome Tanning Wastewater, wherein residual in waste water Cr3+ is generally 2.8g/l-3.2g/l, Cl-is generally 7g/l-15g/l, and acid group content residual in waste water is generally the 30%-45% of initial content; Containing Na+, Cr3+ and organic tanning agent etc. in retanning waste water; Containing neutral salt etc. in neutralized wastewater; In dyeing process, employ 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 great pollution is caused to environment, and the great wasting of resources can be produced.
Preferably, pre-immersion, main immersion and liming operation can adopt same rotary drum or paddle-tumble, and the pre-immersion of collection respectively, main immersion and liming waste water on rotary drum side, control rotary drum in the mode of valve or paddle-tumble carries out discharge of wastewater to each collection device; Specifically, when pre-immersion, main immersion and liming are with during with a rotary drum or paddle-tumble, rotary drum or paddle-tumble arrange valve 1, for the discharge of wastewater that will soak in advance to corresponding waste water collection device, meanwhile, rotary drum or paddle-tumble arrange valve 2, for by main immersion discharge of wastewater to corresponding waste water collection device, meanwhile, rotary drum or paddle-tumble arrange valve 3, for by liming discharge of wastewater to corresponding waste water collection device; During discharge pre-immersion waste water, valve 1 is opened, and valve 2,3 is closed, and waste water is discharged into corresponding waste water collection device through shunt conduit; When discharging main immersion waste water, valve 2 is opened, and valve 1,3 is closed, and waste water is discharged into corresponding waste water collection device through shunt conduit; During discharge liming waste water, valve 1,2 is closed, and valve 3 is opened, and waste water is discharged into corresponding waste water collection device through shunt conduit.
Similarly, deashing and softening and pickling chrome tanning process also can adopt same rotary drum, in rotary drum other collection deashing and softening and pickling Chrome Tanning Wastewater respectively, control rotary drum carry out discharge of wastewater to each collection device in the mode of valve; Specifically, when deashing and softening and pickling chrome tanning are with during with a rotary drum, rotary drum arranges valve 4, for by deashing and softening discharge of wastewater to corresponding waste water collection device, meanwhile, rotary drum arranges valve 5, for pickling Chrome Tanning Wastewater is discharged into corresponding waste water collection device.During discharge deashing and softening waste water, valve 4 is opened, and valve 5 is closed, and waste water is discharged into corresponding waste water collection device through shunt conduit; During discharge pickling Chrome Tanning Wastewater, valve 4 is closed, and valve 5 is opened, and waste water is discharged into corresponding waste water collection device through shunt conduit.
Similarly, retanning, neutralization and dyeing process can adopt same rotary drum, rotary drum other collect respectively retanning, in and and dyeing waste-water, control rotary drum in the mode of valve and carry out discharge of wastewater to each collection device.Specifically, when retanning, neutralization and dyeing are with during with a rotary drum, rotary drum arranges valve 6, for by retanning discharge of wastewater to corresponding waste water collection device, meanwhile, rotary drum arranges valve 7, for neutralized wastewater is discharged into corresponding waste water collection device, meanwhile, rotary drum arranges valve 8, for dyeing waste-water is discharged into corresponding waste water collection device.During discharge retanning waste water, valve 6 is opened, and valve 7,8 is closed, and waste water is discharged into corresponding waste water collection device through shunt conduit; During discharge neutralized wastewater, valve 7 is opened, and valve 6,8 is closed, and waste water is discharged into corresponding waste water collection device through shunt conduit; During discharge dyeing waste-water, valve 6,7 is closed, and valve 8 is opened, and waste water is discharged into corresponding waste water collection device through shunt conduit.
In waste water circulation recycling process of the present invention, for pre-immersion, main immersion, liming, answer ash, deashing and softening, pickling chrome tanning, retanning, neutralization and these waste water circulations that dye operation for, can carry out cleaning process according to the sliminess of each waste water, removing useless solid thing wherein, and detecting microorganism in waste water, proteolytic enzyme, pH value, chromium ion, calcium ion, sulfide and other related compounds, waste water continues cycling and reutilization.Such as, clean process by the mode of press filtration to waste water, be used for filling out hole or brickmaking or other purposes through the isolated useless solid thing of press filtration, isolated waste water enters each waste water collection device in order to cycling and reutilization.The cycle cleaning process to waste water, comparatively traditional treatment method was long, and processed simple and easy.
The present invention has following beneficial effect:
Present invention achieves in process hides from pre-immersion to the waste water circulation recycling of each operation of dyeing, and can recycle by iterative cycles, sewage effluent hardly, thoroughly solve a pollution in leather industry difficult problem, particularly utilize chrome wastewater, the fluid infusion in later stage heats up fewer than common process 3 DEG C-15 DEG C, saves the energy.The resultant Leather property indices produced thus all reaches requirement, and effectively reduces finished leather loose side rate, improves the degree of packing of finished leather, fullness ratio.For fresh water technique, after every procedure terminates, the useless solid thing produced is the 5%-40% of fresh water technique, can realize saving material 15%-55% simultaneously, as saved chromium powder 35%-65%, part material can realize saving more than 90%, and indivedual material such as salt can realize saving 100%.
Accompanying drawing explanation
Accompanying drawing 1 a kind ofly realizes the schematic flow sheet of leather-making waste water close to the circulation engineering of zero release according to of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is further described:
Embodiment 1
As shown in Figure 1, in pre-soaking process, pre-immersion waste water enters the wastewater disposal basin that soaks in advance, filter useless solid thing wherein, stir, be then input to pre-soaking drum by lye pump, the technique utilizing pre-immersion waste water to carry out pre-immersion is: with raw hide weighing scale, 200% soaks waste water in advance, 0.25% sterilant, turns 15 minutes; 0.35% Soaking, 0.2% grease-removing agent, 0.2% soda ash, turns 20 minutes/stops 40 minutes, turns and stops combination and carry out 4 times; Pre-immersion terminates waste water and enters wastewater disposal basin; By fur fleshing, then carry out main immersion;
In main soaking process, main immersion waste water enters main immersion wastewater disposal basin, filters useless solid thing wherein, stir, then be input to main soaking drum by lye pump, the technique utilizing main immersion waste water to carry out main immersion is: with raw hide weighing scale, 200% main immersion waste water, 0.7% Soaking, 0.3% grease-removing agent, 0.5% soda ash, 0.1% Na2S, turn 40 minutes/stop 40 minutes, turn and stop combination and carry out 3 times; 0.3% sterilant, turns 20 minutes, then often turns 3 minutes/stop 57 minutes, spend the night; Next day turns 40 minutes continuously; Main immersion terminates waste water and enters wastewater disposal basin;
In liming operation, liming waste water enters liming wastewater disposal basin, filters useless solid thing wherein, stirs, then be 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% auxiliary liming agent, 0.15% NaHS, turns 30 minutes; 1.2% lime, turns 30 minutes/stops 30 minutes; 0.5%NaHS, turns 20 minutes/stops 20 minutes; Start to filter hair; 0.5%Na2S, 0.8% lime, 0.1% grease-removing agent, turns 20 minutes/stops 30 minutes, turns and stops in conjunction with 3 times; 20% spent lime liquor, 0.5%Na2S, 0.5% auxiliary liming agent, 1.0% lime, turns 20 minutes/stops 20 minutes, turns and stops in conjunction with 2 times; Then turn 10 minutes/stop 20 minutes, turn and stop in conjunction with 6 times; 80% spent lime liquor, turns 10 minutes; Then often turn 5 minutes/stop 55 minutes, spend the night; Liming terminates waste water and enters wastewater disposal basin; Graywall is carried out fleshing split, then carries out multiple ash;
In multiple ash process, multiple grey waste water enters multiple grey wastewater disposal basin, filters useless solid thing wherein, stir, be then input to liming rotary drum by lye pump, the technique utilizing multiple grey waste water to carry out multiple ash is: with raw hide weighing scale, 100% multiple grey waste water, 0.8% lime, 0.2% sodium sulphite, 0.4% auxiliary liming agent, 0.10%NaOH, turns 30 minutes/stops 40 minutes, then often turn 5 minutes/stop 55 minutes, turn and stop combination and carry out 6 times, spend the night; Multiple ash terminates waste water and enters wastewater disposal basin;
In deashing and softening operation, deashing and softening waste water enters deashing and softening wastewater disposal basin, filters useless solid thing wherein, stir, then be input to deashing and softening rotary drum by acid and alkali-proof pump, the technique utilizing waste water to carry out deashing and softening is: with graywall weighing scale, 100% deashing and softening waste water, 0.2% grease-removing agent, 0.6% deliming agent, 1.2% ammonium sulfate, 0.2% hydrochloric acid, 0.3% acetic acid, turns 40 minutes; 0.25% macerating enzyme, turns 30 minutes; Deashing and softening terminates waste water and enters wastewater disposal basin;
In pickling chrome tanning process, pickling Chrome Tanning Wastewater is drained into wastewater disposal basin, filter useless solid thing wherein, stir, be then input to pickling chrome tanning rotary drum by acid proof pump, utilize pickling Chrome Tanning Wastewater to carry out pickling chrome tanning process to be: with the weighing scale of graywall, 90% pickling Chrome Tanning Wastewater, with sulfuric acid, its pH value is adjusted to 0.7,0.25% mould inhibitor, turns 10 minutes; 0.5% formic acid, turns 20 minutes; 0.3% sulfuric acid, divides three times equally and adds, and every minor tick 10 minutes, then turns 90 minutes; 0.2% fatting agent, turns 30 minutes, stops 1.5 hours; 1.8% chromium powder, turns 30 minutes; 2.2% chromium powder, turns 1 hour; 0.5% sodium formiate, turns 30 minutes; 0.25% carries alkaline agent, turns 4 hours; 80% pickling Chrome Tanning Wastewater, is warming up to 35 DEG C, turns 3 hours; Pickling chrome tanning terminates waste water and enters wastewater disposal basin;
In retanning procedures, retanning waste water enters retanning wastewater disposal basin, filters useless solid thing wherein, stirs, then retanning rotary drum is input to by acid proof pump, utilize retanning waste water to carry out retanning process to be: with the weighing scale of shaving leather, 90% retanning waste water, is adjusted to 2.5 with sulfuric acid by its pH value, 150% retanning waste water, temperature is adjusted to 36 DEG C, 0.3% formic acid, turns 30 minutes; 1.5% acrylic acid double tanning agent, turns 30 minutes; 1.0% chromium powder, 0.3% fatting agent, turns 60 minutes; 1.0% alkanoic, turns 30 minutes; 0.8% sodium formiate, 0.2% sodium bicarbonate, turns 60 minutes, then turns 10 minutes/stop 50 minutes, turns and stops combination and carry out 5 times, and pH value requires 2.8-4.8; Retanning terminates waste water and enters wastewater disposal basin;
In and operation in, neutralized wastewater enters neutralized wastewater pond, filter useless solid thing wherein, stir, in being then input to by acid proof pump and rotary drum, in utilizing neutralized wastewater to carry out with technique be: with shaving leather weighing scale, 200% neutralized wastewater, temperature is adjusted to 35 DEG C, in 2.0% and tannin, 1.5% sodium formiate, turns 20 minutes; 1.2% sodium bicarbonate, 3.0% fatting agent, turns 60 minutes, requires: pH value 4.0-6.5; Neutralization terminates waste water and enters wastewater disposal basin;
In dyeing process, dyeing waste-water enters same color and luster dyeing waste-water pond, filter useless solid thing wherein, stir, be then input to dyeing drum by acid proof pump, the technique utilizing dyeing waste-water to carry out dyeing is: with shaving leather weighing scale, 80% dyeing waste-water, temperature is adjusted to 30 DEG C, 2.5% acrylic acid double tanning 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, 1.5% compound fatting agent, turns 60 minutes, requires: dyeing terminates waste water and enters same color and luster wastewater disposal basin;
The recycling waste water of above-mentioned pre-immersion, main immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, neutralization and dyeing process optionally carries out press filtration process, the waste water reclamation that press filtration obtains enters corresponding wastewater disposal basin and continues cycling and reutilization, and the useless solid thing that press filtration obtains is cheated or other for filling out.
When not departing from the present invention's spirit or substantive features, the present invention can be implemented in other forms, with reference to claim but not above-mentioned specification sheets, as instruction scope of the present invention.
Claims (3)
1. realize the circulation engineering of leather-making waste water close to zero release, it is characterized in that pre-immersion, main immersion, liming, multiple ash, deashing and softening, pickling chrome tanning, retanning, in and, also independently carry out cycling utilization of wastewater step by step in dyeing process;
(1) pre-soaking process means of waste water reuse: this operation is the waste water after collecting each pre-soaking process terminates, and filters useless solid thing wherein, stirs, be placed on by pre-soaking drum or paddle-tumble; For the pre-immersion of lower batch of skin; Detect the microbe population in waste water, to determine the consumption of sterilant;
(2) soaking process means of waste water reuse: this operation is the waste water after collecting each soaking process terminates, overanxious useless solid thing wherein, stirs, is placed on by soaking drum or paddle-tumble; For the immersion of lower batch of skin; Detect the microbe population in waste water, to determine the consumption of sterilant;
(3) liming operation means of waste water reuse; This operation is the waste water after collecting each liming operation terminates, and filters useless solid thing wherein, stirs, be placed on by liming rotary drum or paddle-tumble; For the liming of lower batch of skin; Filter hair is required in liming process;
(4) multiple ash process means of waste water reuse; This operation is the waste water after collecting each ash process again terminates, and filters useless solid thing wherein, stirs, be placed on by multiple grey rotary drum or paddle-tumble; For the multiple ash of lower batch of skin;
(5) deashing and softening operation means of waste water reuse; This operation is the waste water after collecting each deashing and softening operation terminates, and filters useless solid thing wherein, stirs, be placed on by deashing and softening rotary drum; For the deashing and softening of lower batch of skin;
(6) pickling chrome tanning process means of waste water reuse; This operation is the waste water after collecting each pickling chrome tanning process terminates, and filters useless solid thing wherein, stirs, be placed on by pickling chrome tanning rotary drum; For the pickling chrome tanning of lower batch of skin;
(7) retanning procedures means of waste water reuse; This operation is the waste water after collecting each retanning procedures terminates, and filters useless solid thing wherein, stirs, be placed on by retanning rotary drum; For the retanning of lower batch of skin;
(8) with operation means of waste water reuse in; This operation be to collect each in and operation terminate after waste water, filter useless solid thing wherein, stir, in being placed on and by rotary drum; For the neutralization of lower batch of skin;
(9) dyeing process means of waste water reuse; This operation is the waste water after collecting each dyeing process terminates, and filters useless solid thing wherein, stirs, be placed on by dyeing drum; For the dyeing of lower batch of skin.
2., after nine procedures described in claim 1 is characterized in that every procedure terminates, the normal volatilization under removing state of nature and outside inevitably spilling, collected waste water fully recovering, when waste water is not enough, uses fresh water supplementary.
3., after nine procedures described in claim 1 is characterized in that every procedure terminates, the useless solid thing produced is the 5%-40% of fresh water technique.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410051333.7A CN104843807A (en) | 2014-02-15 | 2014-02-15 | Cycle engineering for realization of tanning waste water near-zero emission |
| US14/220,871 US9776887B2 (en) | 2013-12-04 | 2014-03-20 | Tannery process with effluent recycling |
| PCT/CN2014/075331 WO2015120661A1 (en) | 2014-02-15 | 2014-04-14 | Circulation engineering for achieving near-zero discharge of tanning waste water |
| AU2014202826A AU2014202826B2 (en) | 2013-12-04 | 2014-05-22 | Tannery process with effluent recycling |
| BR102014012781A BR102014012781A2 (en) | 2013-12-04 | 2014-05-27 | tanning process with wastewater recycling |
| EP14002106.4A EP2881369A1 (en) | 2013-12-04 | 2014-06-18 | Tannery process with effluent recycling |
| NZ626503A NZ626503B (en) | 2013-12-04 | 2014-06-20 | Tannery process with effluent recycling |
| US15/723,146 US10501336B2 (en) | 2013-12-04 | 2017-10-02 | Tannery process with effluent recycling |
| US16/708,002 US11040890B2 (en) | 2013-12-04 | 2019-12-09 | Tannery process with effluent recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410051333.7A CN104843807A (en) | 2014-02-15 | 2014-02-15 | Cycle engineering for realization of tanning waste water near-zero emission |
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| CN104843807A true CN104843807A (en) | 2015-08-19 |
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| CN201410051333.7A Pending CN104843807A (en) | 2013-12-04 | 2014-02-15 | Cycle engineering for realization of tanning waste water near-zero emission |
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| CN (1) | CN104843807A (en) |
| WO (1) | WO2015120661A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105969919A (en) * | 2016-06-12 | 2016-09-28 | 桐乡市恒球皮草制品有限公司 | Tanning process for making fur from raw fox skins |
| CN106011324A (en) * | 2016-06-12 | 2016-10-12 | 桐乡市恒球皮草制品有限公司 | Tanning process for kid lamb skin and Hu sheep skin |
| CN110498573A (en) * | 2019-09-06 | 2019-11-26 | 张洪响 | A kind of method suede nitre dye wastewater treatment and recycled |
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| RU2046762C1 (en) * | 1993-01-11 | 1995-10-27 | Поворов Александр Александрович | Method for purification of tannery die-work sewage waters |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105969919A (en) * | 2016-06-12 | 2016-09-28 | 桐乡市恒球皮草制品有限公司 | Tanning process for making fur from raw fox skins |
| CN106011324A (en) * | 2016-06-12 | 2016-10-12 | 桐乡市恒球皮草制品有限公司 | Tanning process for kid lamb skin and Hu sheep skin |
| CN110498573A (en) * | 2019-09-06 | 2019-11-26 | 张洪响 | A kind of method suede nitre dye wastewater treatment and recycled |
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| WO2015120661A1 (en) | 2015-08-20 |
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