CN100431986C - Tanning technology for treatment and reuse of waste chrome liquor of bate without discharge and its treatment device - Google Patents
Tanning technology for treatment and reuse of waste chrome liquor of bate without discharge and its treatment device Download PDFInfo
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- CN100431986C CN100431986C CNB2004100993896A CN200410099389A CN100431986C CN 100431986 C CN100431986 C CN 100431986C CN B2004100993896 A CNB2004100993896 A CN B2004100993896A CN 200410099389 A CN200410099389 A CN 200410099389A CN 100431986 C CN100431986 C CN 100431986C
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- alkali lye
- liquor
- pond
- chrome liquor
- suspended substance
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000005516 engineering process Methods 0.000 title claims description 8
- 239000002699 waste material Substances 0.000 title abstract 7
- 239000003513 alkali Substances 0.000 claims abstract description 88
- 239000000126 substance Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000035617 depilation Effects 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011651 chromium Substances 0.000 claims abstract description 8
- 238000005554 pickling Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000007864 suspending Methods 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims description 37
- 239000010802 sludge Substances 0.000 claims description 30
- 239000013049 sediment Substances 0.000 claims description 26
- 208000001840 Dandruff Diseases 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 23
- 239000000706 filtrate Substances 0.000 claims description 22
- 238000001556 precipitation Methods 0.000 claims description 21
- 239000012535 impurity Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000013505 freshwater Substances 0.000 claims description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 13
- 239000010985 leather Substances 0.000 abstract description 9
- 229910052804 chromium Inorganic materials 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract 6
- 238000007598 dipping method Methods 0.000 abstract 3
- 238000000151 deposition Methods 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000007790 scraping Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002951 depilatory effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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Classifications
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Removal Of Specific Substances (AREA)
Abstract
Leather making sewage is one of important pollution sources generated by leather making enterprises. The leather making sewage is discharged by dust alkali liquid and waste chromium liquid, and thus, the leather making sewage brings large pressure to environment, and is resource waste. The present invention provides a leather making technique capable of realizing the treatment, the recycling and the zero discharge of dust alkali liquid and waste chromium liquid, which comprises the steps: pre-dipping water, scraping oil, mainly dipping water, depilation fur, dipping dust, slicing skin, deliming, softening, washing with water, pickling, tanning, regulating, fetching the fur, filtering the fur, suspending, depositing, regulating the inner dust alkali liquid, fetching the fur, aerating, regulating, suspending, depositing, filtering fur cuttings, regulating the inner waste chromium liquid, etc. The dust alkali liquid and the waste chromium liquid as important pollution sources generated in the leather making process are treated and recycled in a sectional mode, and the zero discharge is realized; simultaneously, the present invention provides a treatment device of the dust alkali liquid and the waste chromium liquid. The technique and the device of the present invention have advantages of reasonable design, convenient operation, safe operation and reliability. By recycling, the water resources and the chemical substances can be saved, and the integrated cost is reduced.
Description
Technical field
The invention belongs to a kind of tanning industry clearer production technology and corresponding device thereof, particularly relate to a kind of useless chrome liquor of grey alkali lye of realizing and handle the method for leather-making and the useless chrome liquor treatment unit of grey alkali lye of recover zero discharge.
Background technology
Tanning sewage is one of main pollution of leather-making enterprises generation, and the amount of tanning sewage is very big, and wherein the content of hazardous and noxious substances such as chromium, sulfide is higher, and by the requirement of environmental administration, tanning sewage must qualified discharge.At present, most of leather-making enterprises are all set up Sewage treatment systems, focus on owing to adopt, effect is unsatisfactory, but processing cost is very high, the leather-making enterprises of some economically underdeveloped areas especially, and the Sewage treatment systems construction lags behind, it is undesired to move, and sewage emissions has caused great harm to environment; Even qualified discharge because sewage quantity is big, can bring very big pressure to environment equally.Investigation finds that in the area that some leather-making enterprises are concentrated, river water quality is seriously damaged, even has influence on phreatic quality.From the angle of the utilization of resources, the discharging of large amount of sewage is the significant wastage of water resources; Having carried many chemical substances in the sewage of discharging, when environment is worked the mischief, also is a kind of very big wasting of resources.By leather-making technology as can be known, 1 ton of wet blue leather of the every processing of leather-making enterprises need consume depilatory sulfide 40kg, consumes the used chromic salts 50kg of tanning, and water consumption then reaches more than 35 tons.Therefore, strengthen tanning sewage and handle, utilize water resources and other physical resources as much as possible, the protection that strengthens environment has become extremely urgent thing.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, propose a kind of useless chrome liquor of grey alkali lye of realizing and handled the method for leather-making of recover zero discharge, important source of pollution ash alkali lye and useless chrome liquor that the process hides process produces are carried out staging treating, and be back to again in the process hides process, realized the zero release of grey alkali lye and useless chrome liquor; The treatment unit of grey alkali lye and useless chrome liquor has also been proposed simultaneously.
The technical solution adopted in the present invention is:
A kind of useless chrome liquor of grey alkali lye of realizing is handled the method for leather-making of recover zero discharge, comprises pre-immersion, frizing, main immersion, depilation and liming, split, deliming, softens, washing, pickling and tanning step; Also comprise the grey alkali lye processing and the chrome liquor treatment step that gives up, the grey alkali lye that described depilation and liming step produce is back to depilation and liming step after treatment, the useless chrome liquor that described tanning step produces is back to the tanning step after treatment, realizes the circulation recover zero discharge of important source of pollution ash alkali lye of process hides process and useless chrome liquor; Simultaneously, for adapting to the cyclically utilizing of grey alkali lye and useless chrome liquor, correlation step has also been set concrete technology:
(1) depilation and liming: adopt the Bao Maofa depilation; Required water mainly utilizes reuse ash alkali lye, and insufficient section replenishes fresh water, and the while is according to the content of Sodium Sulphide in the reuse ash alkali lye, the consumption of corresponding minimizing Sodium Sulphide;
(2) tanning: required water mainly utilizes the reuse chrome liquor that gives up, and insufficient section replenishes fresh water, simultaneously according to Cr in the useless chrome liquor of reuse
2O
3Content, the consumption of corresponding minimizing chromium powder.
Described grey alkali lye processing comprises adjusting, drags for hair, filters hair, suspends and precipitate and adjust step:
(I) regulate: depilation directly enters equalizing tank with the grey alkali lye that the liming step produces, and is subjected to the effect of bottom stirring system, is in mobile, mixed state all the time, can not produce precipitation;
(II) filter hair: the grey alkali lye in the equalizing tank is filtered with pump input filter hair machine, remove wherein hair and other impurity;
(III) drag for hair: enter mao machine that drags for by the grey alkali lye of filtering the discharge of hair machine and drag for residual hair and other impurity;
(IV) suspension and precipitation: mao grey alkali lye of machine processing enters suspension and settling tank suspends and precipitation process through dragging for, the throw out that produces is that mud enters sludge sump through sediment discharge pipe continous way or discontinuous, suspended substance enters sludge sump through suspended substance delivery pipe discontinuous, but the grey alkali lye of reuse then enters grey alkali lye pond for recovering through drain pipe continous way or discontinuous; When grey alkali lye liquid level suspended substance reaches a certain amount of in suspension and the settling tank, close the drain pipe control valve, suspend and the interior grey alkali lye liquid level rising of settling tank, suspended substance just can be discharged through the suspended substance delivery pipe;
(V) adjust: but the ash of the reuse in grey alkali lye pond for recovering alkali lye is tested, and suitably adjust pH and concentration according to test case, make it to adapt to the requirement of reuse.
Described useless chrome liquor processing comprises drags for hair, aeration and adjusting, suspension and precipitation, scurf filtration and adjusts step:
(a) drag for hair: the useless chrome liquor that is produced by the tanning step at first drags for hair and other impurity that floats on the surface by dragging for mao machine;
(b) aeration and adjusting: the useless chrome liquor through dragging for mao step process enters equalizing tank and carries out the aeration processing, and the pressurized air that comes from gas-holder is entered by the bottom, and the interior useless chrome liquor of equalizing tank is in mobile, mixed state all the time, can not produce precipitation;
(c) suspend and precipitation: the useless chrome liquor input suspension in the equalizing tank is suspended and precipitation process with settling tank, the throw out that produces is that mud enters sludge sump through sediment discharge pipe continous way or discontinuous, suspended substance enters sludge sump through suspended substance delivery pipe discontinuous, but the useless chrome liquor of reuse then enters the scurf filtration unit through drain pipe continous way or discontinuous; When useless chrome liquor liquid level suspended substance reaches a certain amount of in suspension and the settling tank, close the drain pipe control valve, suspension is risen with the interior chrome liquor liquid level that gives up of settling tank, and suspended substance just can be discharged through the suspended substance delivery pipe;
(d) scurf filters: enter the scurf filtration unit through the useless chrome liquor with precipitation process of suspending and filter, enter useless chrome liquor pond for recovering after removing scurf wherein;
(e) adjust: but the useless chrome liquor of the reuse in the useless chrome liquor pond for recovering is tested, and suitably adjust pH and concentration according to test case, make it to adapt to the requirement of reuse.
A kind of useless chrome liquor of grey alkali lye of realizing is handled the grey alkali lye processing of the method for leather-making of recover zero discharge and is used device, comprises equalizing tank, pump, filter hair machine, drags for a mao machine, suspension and settling tank, grey alkali lye pond for recovering, sludge sump, stirring system; Described pump is arranged between equalizing tank and the filter hair machine; Describedly drag for the top that mao machine is arranged at the feed liquor pond of described suspension and settling tank; Described stirring system is arranged at the bottom of equalizing tank.
Described suspension and settling tank comprise feed liquor pond, treating pond group and filtrate liquor pool, liquid-inlet pipe, drain pipe, sediment discharge pipe and suspended substance delivery pipe; The top in described feed liquor pond is provided with liquid-inlet pipe, and described liquid-inlet pipe links to each other with filter hair machine, and is connected in mao machine that drags at top, described feed liquor pond; The top of described filtrate liquor pool is provided with drain pipe, and described drain pipe leads to grey alkali lye pond for recovering; The height of described feed liquor pond, treating pond group and filtrate liquor pool is identical and be cascaded successively; Described treating pond group is in series by one group of identical treating pond of structure; Described treating pond bottom is tapered, and its bottom links to each other with described sediment discharge pipe, and described suspended substance delivery pipe is stretched into wherein by described treating pond bottom, and its top is higher than the top that is provided with highly and suitably is lower than described treating pond of described drain pipe; Described sediment discharge pipe and suspended substance delivery pipe lead to sludge sump.
A kind of useless chrome liquor of grey alkali lye of realizing is handled the useless chrome liquor processing of the method for leather-making of recover zero discharge and is used device, comprises and drags for a mao machine, equalizing tank, pump, suspension and settling tank, scurf filtration unit, useless chrome liquor pond for recovering, sludge sump, air compressor machine, gas-holder; The described mao machine that drags for is arranged at before the equalizing tank; Described pump is arranged between equalizing tank and suspension and the settling tank; Described scurf filtration unit is arranged between suspension and settling tank and the useless chrome liquor pond for recovering.
Described suspension and settling tank comprise feed liquor pond, treating pond group and filtrate liquor pool, liquid-inlet pipe, drain pipe, sediment discharge pipe and suspended substance delivery pipe; The top in described feed liquor pond is provided with liquid-inlet pipe, and described liquid-inlet pipe links to each other with pump; The top of described filtrate liquor pool is provided with drain pipe, and described drain pipe leads to useless chrome liquor pond for recovering through the scurf filtration unit; The height of described feed liquor pond, treating pond group and filtrate liquor pool is identical and be cascaded successively; Described treating pond group is in series by one group of identical treating pond of structure; Described treating pond bottom is tapered, and its bottom links to each other with described sediment discharge pipe, and described suspended substance delivery pipe is stretched into wherein by described treating pond bottom, and its top is higher than the top that is provided with highly and suitably is lower than described treating pond of described drain pipe; Described sediment discharge pipe and suspended substance delivery pipe lead to sludge sump.
In the practice, raw hide adopts the Bao Maofa liming again of losing hair or feathers after pre-immersion, frizing, main immersion, and depilation is back to depilation and liming step after treatment with the grey alkali lye that the liming step produces; Carry out split, deliming, softening, washing, pickling and tanning after depilation and the liming, obtain wet blue leather; The useless chrome liquor that the tanning step produces is back to the tanning step after treatment.Ash alkali lye is handled and is finished by grey alkali lye treatment unit, depilation removes unhairing and other impurity with pump input filter hair machine with the grey alkali lye that the liming step produces after equalizing tank is regulated, remove residual hair and other impurity wherein through dragging for mao machine again, entering suspension then suspends and precipitation process with settling tank, throw out is that mud enters sludge sump through the sediment discharge pipe, suspended substance enters sludge sump through the suspended substance delivery pipe, but the grey alkali lye of reuse then enters grey alkali lye pond for recovering through drain pipe.Useless chrome liquor is handled by useless chrome liquor treatment unit and is finished, the useless chrome liquor that the tanning step produces removes unhairing and other impurity through dragging for mao machine, after carrying out aeration and regulate, equalizing tank suspends and precipitation process with settling tank with pump input suspension, throw out is that mud enters sludge sump through the sediment discharge pipe, suspended substance enters sludge sump through the suspended substance delivery pipe, but the useless chrome liquor of reuse then enters the chrome liquor pond for recovering after the scurf filtration unit removes by filter scurf.Described tanning technology technology and grey alkali lye and useless chrome liquor treatment unit are reasonable in design, easy to operate, safe and reliable to operation, realize the grey alkali lye of the important source of pollution of process hides process and the circulation recover zero discharge of useless chrome liquor, can save water resources and chemical substance, reduce comprehensive cost by cyclically utilizing.
Description of drawings
Fig. 1 is the process flow diagram of one embodiment of the present invention.
Fig. 2 is that the present invention's ash alkali lye is handled the synoptic diagram with a kind of embodiment of equipment.
Fig. 3 is that the useless chrome liquor of the present invention is handled the synoptic diagram with a kind of embodiment of equipment.
Fig. 4 is that the present invention's ash alkali lye shown in Figure 2 processing is handled with the suspension in a kind of embodiment of equipment and the cross-sectional schematic of settling tank with a kind of embodiment and the useless chrome liquor of the present invention shown in Figure 3 of equipment.
Embodiment
As shown in Figure 1, raw hide adopts lose hair or feathers liming again, depilation of Bao Maofa to be back to depilation and liming step after treatment with the grey alkali lye that the liming step produces after pre-immersion, frizing, main immersion; Carry out split, deliming, softening, washing, pickling and tanning after depilation and the liming, obtain wet blue leather; The useless chrome liquor that the tanning step produces is back to the tanning step after treatment.
Ash alkali lye is handled and is finished by grey alkali lye treatment unit.As Fig. 2 and shown in Figure 4, this ash alkali lye treatment unit comprises equalizing tank 1, pump 2, filter hair machine 7, drags for mao machine 3, suspension and settling tank 4, grey alkali lye pond for recovering 5, sludge sump 6, stirring system 8; Pump 2 is arranged between equalizing tank 1 and the filter hair machine 7; Drag for mao machine 3 and be arranged at the top that suspends with the feed liquor pond 13 of settling tank 4; Stirring system 8 is arranged at the bottom of equalizing tank 1; Suspension comprises feed liquor pond 13, treating pond group and filtrate liquor pool 15, liquid-inlet pipe 16, drain pipe 17, sediment discharge pipe 18 and suspended substance delivery pipe 19 with settling tank 4; The top in feed liquor pond 13 is provided with liquid-inlet pipe 16, and liquid-inlet pipe 16 links to each other with filter hair machine 7, and is connected in mao machine 3 that drags at 13 tops, feed liquor pond; The top of filtrate liquor pool 15 is provided with drain pipe 17, and drain pipe 17 leads to grey alkali lye pond for recovering 5; The height of feed liquor pond 13, treating pond group and filtrate liquor pool 15 is identical and be cascaded successively; The treating pond group is made up of three treating ponds 14; Treating pond 14 bottoms are tapered, and its bottom links to each other with sediment discharge pipe 18, and suspended substance delivery pipe 19 is stretched into wherein by treating pond 14 bottoms, and its top is higher than the top that is provided with highly and suitably is lower than treating pond 14 of drain pipe 17; Sediment discharge pipe 18 and suspended substance delivery pipe 19 lead to sludge sump 6.Depilation enters equalizing tank 1 with the grey alkali lye that the liming step produces, and under the effect of the bottom of equalizing tank 1 stirring system 8, grey alkali lye is in all the time mobile, mixed state can not produce precipitation; With pump 2 grey alkali lye is transported to filter hair machine then and removes by filter wherein hair and other impurity, deliver to again and drag for mao machine 3 and remove to enter behind residual hair and other impurity and suspend and settling tank 4 suspends and precipitation process.Ash alkali lye is introduced into the feed liquor pond 13 that suspends with settling tank 4, enters first treating pond 14 by its middle part again and handles, and throw out slowly sinks during processing, and suspended substance slowly floats; Handle the back at first treating pond 14 and flow into 14 processing of second treating pond by its middle part; Entering the 3rd treating pond 14 by its middle part again after second treating pond 14 is handled handles; Promptly enter filtrate liquor pool 15 after the 3rd treating pond 14 is handled, but the grey alkali lye in the filtrate liquor pool 15 is the grey alkali lye of reuse, enters grey alkali lye reuse tank 5 through drain pipe 17, delivers to depilation and the reuse of liming step then by its middle part; Throw outs in the treating pond 14 be mud through sediment discharge pipe 18 discontinuous enter sludge sump 6; Grey alkali lye liquid level suspended substance discharging more at once in treating pond 14, close the control valve of drain pipe 17 earlier, grey alkali lye liquid level rises in whole suspension and the settling tank 4, suspended substance just enters sludge sump 6 through suspended substance delivery pipe 19, when grey alkali lye liquid level suspended substance reduces in the treating pond 14, open the control valve of drain pipe 17 again after discharging.The road was handled after mud in the sludge sump 6 will and carry out through the pressure filter press filtration.
Useless chrome liquor is handled by useless chrome liquor treatment unit and is finished, as shown in Figure 3 and Figure 4, this useless chrome liquor is handled with device and is comprised mao machine 3 that drags for, equalizing tank 1, pump 2, suspension and settling tank 4, scurf filtration unit 9, useless chrome liquor pond for recovering 10, sludge sump 6, air compressor machine 12, gas-holder 11; Dragging for mao machine 3 is arranged at before the equalizing tank 1; Pump 2 is arranged between equalizing tank 1 and suspension and the settling tank 4; Scurf filtration unit 9 is arranged between suspension and settling tank 4 and the useless chrome liquor pond for recovering 10; Suspension comprises feed liquor pond 13, treating pond group and filtrate liquor pool 15, liquid-inlet pipe 16, drain pipe 17, sediment discharge pipe 18 and suspended substance delivery pipe 19 with settling tank 4; The top in feed liquor pond 13 is provided with liquid-inlet pipe 16, and liquid-inlet pipe 16 links to each other with pump 2; The top of filtrate liquor pool 15 is provided with drain pipe 17, and drain pipe 17 leads to grey alkali lye pond for recovering 5 through scurf filtration unit 9; The height of feed liquor pond 13, treating pond group and filtrate liquor pool 15 is identical and be cascaded successively; The treating pond group is made up of three treating ponds 14; Treating pond 14 bottoms are tapered, and its bottom links to each other with sediment discharge pipe 18, and suspended substance delivery pipe 19 is stretched into wherein by treating pond 14 bottoms, and its top is higher than the top that is provided with highly and suitably is lower than treating pond 14 of drain pipe 17; Sediment discharge pipe 18 and suspended substance delivery pipe 19 lead to sludge sump 6.The useless chrome liquor that the tanning step produces enters equalizing tank 1 through dragging for after mao machine 1 removes unhairing and other impurity, carries out aeration under the compressed-air actuated effect that enters in equalizing tank 1 bottom and handles, and makes useless chrome liquor be in mobile, mixed state all the time, can not produce precipitation.Pressurized air is produced by air compressor machine 12, is stored in the gas-holder 11; Be transported to the feed liquor pond 13 that suspends with settling tank 4 with pump 2 through liquid-inlet pipe 16 chrome liquor that will give up then, enter first treating pond 14 by its middle part again and handle, throw out slowly sinks during processing, and suspended substance slowly floats; Handle the back at first treating pond 14 and flow into 14 processing of second treating pond by its middle part; Entering the 3rd treating pond 14 by its middle part again after second treating pond 14 is handled handles; After handling, the 3rd treating pond 14 promptly enters filtrate liquor pool 15 by its middle part, but the useless chrome liquor in the filtrate liquor pool 15 is the useless chrome liquor of reuse, after drain pipe 17 input scurf filtration units 9 remove by filter scurf, enter useless chrome liquor pond for recovering 10, deliver to the reuse of tanning step then; Throw outs in the treating pond 14 be mud through sediment discharge pipe 18 discontinuous enter sludge sump 6, useless chrome liquor liquid level suspended substance discharging more at once in treating pond 14, close the control valve of drain pipe 17 earlier, useless chrome liquor liquid level rises in whole suspension and the settling tank 4, suspended substance just enters sludge sump 6 through suspended substance delivery pipe 19, when useless chrome liquor liquid level suspended substance reduces in the treating pond 14, open the control valve of drain pipe 17 again after discharging.The road was handled after mud in the sludge sump 6 will and carry out through the pressure filter press filtration.
Claims (5)
1. can realize that the useless chrome liquor of grey alkali lye handles the method for leather-making of recover zero discharge for one kind, comprise pre-immersion, frizing, main immersion, depilation and liming, split, deliming, softening, washing, pickling and tanning step, it is characterized in that: also comprise the grey alkali lye processing and the chrome liquor treatment step that gives up, the grey alkali lye that described depilation and liming step produce is back to depilation and liming step after treatment, the useless chrome liquor that described tanning step produces is back to the tanning step after treatment, realizes the circulation recover zero discharge of important source of pollution ash alkali lye of process hides process and useless chrome liquor; Simultaneously, for adapting to the cyclically utilizing of grey alkali lye and useless chrome liquor, correlation step has also been set concrete technology:
(1) depilation and liming: adopt the Bao Maofa depilation; Required water mainly utilizes reuse ash alkali lye, and insufficient section replenishes fresh water, and the while is according to the content of Sodium Sulphide in the reuse ash alkali lye, the consumption of corresponding minimizing Sodium Sulphide;
(2) tanning: required water mainly utilizes the reuse chrome liquor that gives up, and insufficient section replenishes fresh water, simultaneously according to Cr in the useless chrome liquor of reuse
2O
3Content, the consumption of corresponding minimizing chromium powder;
Described grey alkali lye processing comprises adjusting, drags for hair, filters hair, suspends and precipitate and adjust step:
(I) regulate: depilation directly enters equalizing tank (1) with the grey alkali lye that the liming step produces, and is subjected to the effect of bottom stirring system (8), is in mobile, mixed state all the time, can not produce precipitation;
(II) filter hair: the grey alkali lye in the equalizing tank (1) is filtered with pump (2) input filter hair machine (7), remove wherein hair and other impurity;
(III) drag for hair: the grey alkali lye of being discharged by filter hair machine (7) enters and drags for a mao machine (3) and drag for residual hair and other impurity;
(IV) suspend and precipitation: the grey alkali lye through dragging for a mao machine (3) processing enters suspension and suspends and precipitation process with settling tank (4), the throw out that produces is that mud enters sludge sump (6) through sediment discharge pipe (18) continous way or discontinuous, suspended substance enters sludge sump (6) through suspended substance delivery pipe (19) discontinuous, but the grey alkali lye of reuse then enters grey alkali lye pond for recovering (5) through drain pipe (17) continous way or discontinuous; When grey alkali lye liquid level suspended substance reaches a certain amount of in suspension and the settling tank (4), close drain pipe (17) control valve, suspend and the interior grey alkali lye liquid level rising of settling tank (4), suspended substance just can be discharged through suspended substance delivery pipe (19);
(V) adjust: to grey alkali lye pond for recovering (5) but in reuse ash alkali lye test, and adjust pH and concentration according to test case, make it to adapt to the requirement of reuse;
Described useless chrome liquor processing comprises drags for hair, aeration and adjusting, suspension and precipitation, scurf filtration and adjusts step:
(a) drag for hair: the useless chrome liquor that is produced by the tanning step at first drags for hair and other impurity that floats on the surface by dragging for a mao machine (3);
(b) aeration and adjusting: the useless chrome liquor through dragging for mao step process enters equalizing tank (1) and carries out the aeration processing, and the pressurized air that comes from gas-holder (11) is entered by the bottom, and the interior useless chrome liquor of equalizing tank (1) is in mobile, mixed state all the time, can not produce precipitation;
(c) suspend and precipitation: the useless chrome liquor input that equalizing tank (1) is interior suspends and settling tank (4) suspends and precipitation process, the throw out that produces is that mud enters sludge sump (6) through sediment discharge pipe (18) continous way or discontinuous, suspended substance enters sludge sump (6) through suspended substance delivery pipe (19) discontinuous, but the useless chrome liquor of reuse then enters scurf filtration unit (9) through drain pipe (17) continous way or discontinuous; When useless chrome liquor liquid level suspended substance reaches a certain amount of in suspension and the settling tank (4), close drain pipe (17) control valve, suspension is risen with the interior chrome liquor liquid level that gives up of settling tank (4), and suspended substance just can be discharged through suspended substance delivery pipe (19);
(d) scurf filters: enter scurf filtration unit (9) through the useless chrome liquor with precipitation process of suspending and filter, enter useless chrome liquor pond for recovering (10) after removing scurf wherein;
(e) adjust: chrome liquor is tested but interior reuse is given up to useless chrome liquor pond for recovering (10), and adjusts pH and concentration according to test case, makes it to adapt to the requirement of reuse.
2. a kind of useless chrome liquor of grey alkali lye of realizing according to claim 1 is handled the grey alkali lye processing of the method for leather-making of recover zero discharge and is used device, it is characterized in that: comprise equalizing tank (1), pump (2), a filter hair machine (7), drag for a mao machine (3), suspension and settling tank (4), grey alkali lye pond for recovering (5), sludge sump (6), stirring system (8); Described pump (2) is arranged between equalizing tank (1) and the filter hair machine (7); Describedly drag for the top that a mao machine (3) is arranged at the feed liquor pond (13) of described suspension and settling tank (4); Described stirring system (8) is arranged at the bottom of equalizing tank (1).
3. a kind of useless chrome liquor of grey alkali lye of realizing according to claim 2 is handled the grey alkali lye processing of the method for leather-making of recover zero discharge and is used device, and it is characterized in that: described suspension and settling tank (4) comprise feed liquor pond (13), treating pond group and filtrate liquor pool (15), liquid-inlet pipe (16), drain pipe (17), sediment discharge pipe (18) and suspended substance delivery pipe (19); The top in described feed liquor pond (13) is provided with liquid-inlet pipe (16), and described liquid-inlet pipe (16) links to each other with filter hair machine (7), and is connected in mao machine (3) that drags at top, described feed liquor pond (13); The top of described filtrate liquor pool (15) is provided with drain pipe (17), and described drain pipe (17) leads to grey alkali lye pond for recovering (5); The height of described feed liquor pond (13), treating pond group and filtrate liquor pool (15) is identical and be cascaded successively; Described treating pond group is in series by one group of identical treating pond (14) of structure; Described treating pond (14) bottom is tapered, its bottom links to each other with described sediment discharge pipe (18), described suspended substance delivery pipe (19) is stretched into wherein by described treating pond (14) bottom, and its top is higher than the top that is provided with highly and suitably is lower than described treating pond (14) of described drain pipe (17); Described sediment discharge pipe (18) and suspended substance delivery pipe (19) lead to sludge sump (6).
4. a kind of useless chrome liquor of grey alkali lye of realizing according to claim 1 is handled the useless chrome liquor processing of the method for leather-making of recover zero discharge and is used device, it is characterized in that: comprise mao machine (3) that drags for, equalizing tank (1), pump (2), suspension and settling tank (4), scurf filtration unit (9), useless chrome liquor pond for recovering (10), sludge sump (6), air compressor machine (12), gas-holder (11); The described mao machine (3) that drags for is arranged at equalizing tank (1) before; Described pump (2) is arranged between equalizing tank (1) and suspension and the settling tank (4); Described scurf filtration unit (9) is arranged between suspension and settling tank (4) and the useless chrome liquor pond for recovering (10).
5. a kind of useless chrome liquor of grey alkali lye of realizing according to claim 4 is handled the useless chrome liquor processing of the method for leather-making of recover zero discharge and is used device, and it is characterized in that: described suspension and settling tank (4) comprise feed liquor pond (13), treating pond group and filtrate liquor pool (15), liquid-inlet pipe (16), drain pipe (17), sediment discharge pipe (18) and suspended substance delivery pipe (19); The top in described feed liquor pond (13) is provided with liquid-inlet pipe (16), and described liquid-inlet pipe (16) links to each other with pump (2); The top of described filtrate liquor pool (15) is provided with drain pipe (17), and described drain pipe (17) leads to useless chrome liquor pond for recovering (10) through scurf filtration unit (9); The height of described feed liquor pond (13), treating pond group and filtrate liquor pool (15) is identical and be cascaded successively; Described treating pond group is in series by one group of identical treating pond (14) of structure; Described treating pond (14) bottom is tapered, its bottom links to each other with described sediment discharge pipe (18), described suspended substance delivery pipe (19) is stretched into wherein by described treating pond (14) bottom, and its top is higher than the top that is provided with highly and suitably is lower than described treating pond (14) of described drain pipe (17); Described sediment discharge pipe (18) and suspended substance delivery pipe (19) lead to sludge sump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100993896A CN100431986C (en) | 2004-12-31 | 2004-12-31 | Tanning technology for treatment and reuse of waste chrome liquor of bate without discharge and its treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100993896A CN100431986C (en) | 2004-12-31 | 2004-12-31 | Tanning technology for treatment and reuse of waste chrome liquor of bate without discharge and its treatment device |
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| Publication Number | Publication Date |
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| CN1654371A CN1654371A (en) | 2005-08-17 |
| CN100431986C true CN100431986C (en) | 2008-11-12 |
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| CN102234695A (en) * | 2010-04-29 | 2011-11-09 | 宝斯卡(商丘)化工有限公司 | Direct cyclic heating method of leather-making treatment solution |
| CN104694675A (en) * | 2013-12-04 | 2015-06-10 | 张壮斗 | Novel process for manufacturing leather with simple procedures and equipment |
| CN110340793A (en) * | 2019-07-02 | 2019-10-18 | 宝钢湛江钢铁有限公司 | A kind of coating class production line APC tower top roller roller-surface cleaning device and its control system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022947A1 (en) * | 1995-01-27 | 1996-08-01 | Manuilova, Eva Julievna | Method of removing heavy metals from water, a colloidal system for purifying water and a method of producing the said system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996022947A1 (en) * | 1995-01-27 | 1996-08-01 | Manuilova, Eva Julievna | Method of removing heavy metals from water, a colloidal system for purifying water and a method of producing the said system |
Non-Patent Citations (2)
| Title |
|---|
| 制革废水循环利用生产山羊服装工艺研究. 苏智健等.中国皮革，第30卷第1期. 2001 |
| 制革废水循环利用生产山羊服装工艺研究. 苏智健等.中国皮革，第30卷第1期. 2001 * |
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