CN101205091B - Coagulating agent for treatment of leather-making waste water and leather-making waste water treating method - Google Patents
Coagulating agent for treatment of leather-making waste water and leather-making waste water treating method Download PDFInfo
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- CN101205091B CN101205091B CN2006101552866A CN200610155286A CN101205091B CN 101205091 B CN101205091 B CN 101205091B CN 2006101552866 A CN2006101552866 A CN 2006101552866A CN 200610155286 A CN200610155286 A CN 200610155286A CN 101205091 B CN101205091 B CN 101205091B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 55
- 239000000701 coagulant Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910001868 water Inorganic materials 0.000 claims abstract description 46
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 230000015271 coagulation Effects 0.000 claims abstract description 4
- 238000005345 coagulation Methods 0.000 claims abstract description 4
- 235000021110 pickles Nutrition 0.000 claims description 63
- 239000012752 auxiliary agent Substances 0.000 claims description 54
- 239000000203 mixture Substances 0.000 claims description 46
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 27
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 24
- 239000011790 ferrous sulphate Substances 0.000 claims description 24
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 24
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 24
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 24
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 24
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 22
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 13
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 12
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 12
- 239000008103 glucose Substances 0.000 claims description 12
- 239000011782 vitamin Substances 0.000 claims description 12
- 229940088594 vitamin Drugs 0.000 claims description 12
- 229930003231 vitamin Natural products 0.000 claims description 12
- 235000013343 vitamin Nutrition 0.000 claims description 12
- 150000003722 vitamin derivatives Chemical class 0.000 claims description 12
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 claims description 11
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- 230000001112 coagulating effect Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002649 leather substitute Substances 0.000 claims description 3
- 238000000247 postprecipitation Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000005554 pickling Methods 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 6
- 239000011651 chromium Substances 0.000 abstract description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003440 toxic substance Substances 0.000 abstract description 3
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract description 2
- 239000000654 additive Substances 0.000 abstract 2
- 230000000996 additive effect Effects 0.000 abstract 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000010985 leather Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000035617 depilation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention discloses a coagulant used for treating tannery wastewater, which consists of pickling waste liquid, calcium aluminate, additive and catalyst; quality percentages of each component are 60 percent - 90 percent of the pickling waste liquid, 8 percent - 37 percent of the calcium aluminate, 1 percent - 3 percent of the additive and 0.01 percent - 0.03 percent of the catalyst.The invention also discloses a method for treating the tannery wastewater which includes the steps: preparing the coagulant, balancing water quality and water quantity of the wastewater, a coagulation reaction, a biochemical treatment, effluent discharge etc. The invention uses steel pickling waste liquid to prepare the coagulant for treating the tannery wastewater so as to reduce the load of treating the pickling waste liquid for the steel deeply-processing industry as well as reduce the treating expense.The invention improves the treatment effect of the wastewater from the tannery industry; removal rate of CODcr content of organic pollutants in the tannery wastewater increases by over 20 percent than the removal rate of common aluminum salts coagulant or ferric salts coagulant; the removal rate of a plurality of toxic substances in the wastewater such as sulfide, chromium etc. reaches over 95 percent; the following ordinary operation of a secondary biochemical treatment system of the tannery wastewater is guaranteed; and the treatment cost is reduced.
Description
[technical field]
The present invention relates to wastewater treatment, relate in particular to leather-making waste water processing coagulating agent.
[background technology]
China's rawhide import in recent years is sustainable growth situation.Only China in 2004 increases by 38% on a year-on-year basis with regard to 12.5 hundred million dollars of import rawhides.World's leather industry since the eighties in last century to the Asia particularly China shift, China has become world leather big country now.
But leather industry is the high pollution industry, and along with the increase of leather industry output, the pollutent of tanning industry discharging is also in continuous increase, and the leather-making waste water environmental pollution problem becomes increasingly conspicuous.The most of tanneries of China adopt lime depilation and chrome tanning technology, and the characteristics of consequent leather-making waste water are that alkalescence is high, colourity is dark, oxygen-consumption is high, suspended substance is many, and contain deleterious chromium and sulfide.Show that according to the pertinent data statistics the annual waste discharge of China's leather industry reaches 8,000 ten thousand tons, wherein contains many ten thousand tons of CODcr20, BOD
5More than 80,000 ton, more than 3500 ton of chromium, more than 5000 ton in sulfide." materialization+biochemistry " second-stage treatment technology that the waste water disposal facility of the above leather-making enterprises of present most of scales has adopted dosing coagulating sedimentation and activated sludge process to combine, wherein physicochemical treatment unit has very important effect.But because coagulating agent of using always on the market such as polymerize aluminum chloride etc. lack specific aim to the high density leather-making waste water, not high to contaminant removal efficiency, especially the clearance to sulfide and chromium is lower, cause biochemical influent concentration too high, toxic substance enters biochemical system in a large number, influenced the activity of biochemical activity mud, finally influenced treat effluent water quality, made water outlet be difficult to reach national requirements for environmental protection.
On the other hand, in the deep-processing process of steel, need that acid pickling and rust removing is carried out on its surface and handle, the most frequently used pickle solution is exactly a hydrochloric acid.Steel can produce a large amount of spent pickle liquors behind chlorohydric acid pickling, the main component of spent pickle liquor is iron protochloride or ferrous sulfate, hydrogenchloride and water etc., generally contains chlorination ferrous or ferrous sulfate 10-20%, hydrogenchloride 3-10%.According to the preliminary statistics, only the annual acid washing rolled steel waste liquid that produces in surplus Pinghu City in Zhejiang and surrounding area just reaches more than 20000 ton, because spent pickle liquor has serious corrodibility, be put into " national Hazardous wastes register ", this class waste liquid adopts traditional lime neutralisation processing cost very big, and the body refuse that produces because of the difficulty of dewatering, be difficult for dryly, post-processing difficulty is big, simultaneously, this treatment process has been wasted a large amount of acid and iron resources.
At the characteristics of steel deep processing spent pickle liquor,, utilize spent pickle liquor research and development leather-making waste water coagulant special that good realistic meaning is arranged in conjunction with the leather-making waste water characteristic.
So, how rationally to make full use of steel deep processing spent pickle liquor, develop and remove useless efficient height, leather-making waste water coagulant special that processing cost is low, become the important topic of those skilled in the art's research.
[summary of the invention]
Purpose of the present invention solves the problems of the prior art exactly, proposes a kind of leather-making waste water and handles with coagulating agent and leather-making waste water treatment method, removes useless efficient height, processing cost is low.
For achieving the above object, the present invention proposes a kind of leather-making waste water processing and use coagulating agent, contain spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer.
As preferably, the mass percent of each composition is:
Spent pickle liquor: 60%-90%;
Calcium aluminate: 8%-37%;
Auxiliary agent: 1%-3%;
Catalyzer: 0.01%-0.03%.
As preferably, the mass percent of each composition is:
Spent pickle liquor: 73%-85%;
Calcium aluminate: 13%-25%;
Auxiliary agent: 1%-2%;
Catalyzer: 0.01%-0.03%.
As preferably, the mass percent of each composition is:
Spent pickle liquor: 80%;
Calcium aluminate: 18.99%;
Auxiliary agent: 1%;
Catalyzer: 0.01%.
As preferably, described auxiliary agent adopts pure aluminium silicate.
As preferably, the composition of described catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.
As preferably, the composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water.
As preferably, the mass percent of each composition is iron protochloride or ferrous sulfate 10-20% in the described spent pickle liquor, hydrogenchloride 3-10%, and surplus is a water.
For achieving the above object, the invention allows for a kind of treatment process of leather-making waste water, mainly comprise the steps:
Preparation coagulating agent: earlier spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer are mixed by a certain percentage, adopt steam to heat and stir simultaneously again and make coagulant special;
Waste water quality, water balance: after synthetic leather wastewater imported equalizing tank inner equilibrium water quality, the water yield, enter reaction tank by sump pump;
Coagulating: in reaction tank, add about 2 ‰ coagulating agent of wastewater flow rate, carry out coagulating and enter the settling tank precipitation after being aided with coagulation condition;
Biochemical treatment: biochemical treatment is carried out in the water outlet of coagulating and post precipitation; With
Water outlet discharging: the water outlet after the biochemical treatment is discharged.
As preferably, the mass percent of each composition is in the preparation coagulating agent step:
Spent pickle liquor: 60%-90%;
Calcium aluminate: 8%-37%;
Auxiliary agent: 1%-3%;
Catalyzer: 0.01%-0.03%.
Beneficial effect of the present invention: the present invention utilizes iron and steel pickling waste liquid to make leather-making waste water and handles coagulating agent, and the spent pickle liquor that has alleviated iron and steel deep processing industry is handled burden, has reduced its processing costs.Improved the treatment effect of leather industry waste water, the clearance of organic pollutant content CODcr has improved more than 20% than conventional aluminium salt or molysite class coagulating agent in the leather-making waste water, brings up to more than 60% by original about 40%, has improved processing efficiency greatly; Remove multiple toxic substances such as sulfides from wastewater and chromium, the clearance of sulfide and chromium has been reached more than 95%, guaranteed the normal operation of follow-up leather-making waste water secondary biochemical treatment system; Reduce the processing cost of leather-making waste water, in discharge of wastewater, realized the purpose of the treatment of wastes with processes of wastes against one another.This coagulating agent is very wide to the scope of application of the pH value of former water.Guarantee the stably reaching standard of leather industry source of pollution, promoted the fast development of leather industry.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is the schema of a kind of treatment process of leather-making waste water among the present invention.
[embodiment]
Embodiment one:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 90%; Calcium aluminate: 8.99%; Auxiliary agent: 1%; Catalyzer: 0.01%.Auxiliary agent adopts the composition of alumina silicate catalyst mainly to comprise glucose, VITAMIN, salt and iron trichloride.Described spent pickle liquor composition mainly comprise iron protochloride or ferrous sulfate, hydrogenchloride and water, the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment two:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 61.99%; Calcium aluminate: 37%; Auxiliary agent: 1%; Catalyzer: 0.01%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment three:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 85%; Calcium aluminate: 11.97%; Auxiliary agent: 3%; Catalyzer: 0.03%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment four:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 71.97%; Calcium aluminate: 25%; Auxiliary agent: 3%; Catalyzer: 0.03%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment five:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 60%; Calcium aluminate: 36.97%; Auxiliary agent: 3%; Catalyzer: 0.03%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment six:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 88.97%; Calcium aluminate: 8%; Auxiliary agent: 3%; Catalyzer: 0.03%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment seven:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 73%; Calcium aluminate: 24.98%; Auxiliary agent: 2%; Catalyzer: 0.02%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment eight:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 84.88%; Calcium aluminate: 13%; Auxiliary agent: 2%; Catalyzer: 0.02%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment nine:
Leather-making waste water is handled and is used coagulating agent, contains spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, wherein, and spent pickle liquor: 80%; Calcium aluminate: 18.99%; Auxiliary agent: 1%; Catalyzer: 0.01%.Auxiliary agent adopts pure aluminium silicate.The composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride.The composition of described spent pickle liquor mainly comprises iron protochloride or ferrous sulfate, hydrogenchloride and water, and the mass percent of each composition is iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, and surplus is a water.After spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer mixed according to the above ratio, adopt steam to heat and stir simultaneously and make coagulant special; Heat temperature to 95 ℃-120 ℃ of steam, stirring reaction is about 8 hours.
Embodiment ten:
Fig. 1 is the schema of a kind of treatment process of leather-making waste water among the present invention.Mainly comprise the steps:
Preparation coagulating agent 1: earlier spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer are mixed by a certain percentage, adopt steam to heat and stir simultaneously again and make coagulant special;
Waste water quality, water balance 2: after synthetic leather wastewater imported equalizing tank inner equilibrium water quality, the water yield, enter reaction tank by sump pump;
Coagulating 3: in reaction tank, add about 2 ‰ coagulating agent of wastewater flow rate, carry out coagulating and enter the settling tank precipitation after being aided with coagulation condition;
Biochemical treatment 4: biochemical treatment is carried out in the water outlet of coagulating and post precipitation; With
Water outlet discharging 5: the water outlet after the biochemical treatment is discharged.
The mass percent of each composition is in the preparation coagulating agent 1: spent pickle liquor: 60%-90%; Calcium aluminate: 8%-37%; Auxiliary agent: 1%-3%; Catalyzer: 0.01%-0.03%.
The foregoing description is to explanation of the present invention, is not limitation of the invention, and any scheme after simple transformation on the basis of the present invention all belongs to protection scope of the present invention.
Claims (6)
1. a leather-making waste water is handled and is used coagulating agent, it is characterized in that: contain spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer, described auxiliary agent adopts pure aluminium silicate, the composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride, spent pickle liquor comprises that following composition and each composition quality per-cent are: iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, surplus is a water, after above-mentioned spent pickle liquor, calcium aluminate, auxiliary agent and catalyst mix, adopt steam to heat and stir simultaneously and make coagulating agent.
2. a kind of leather-making waste water as claimed in claim 1 is handled and is used coagulating agent, and it is characterized in that: the mass percent of each composition is:
Spent pickle liquor: 60%-90%;
Calcium aluminate: 8%-37%;
Auxiliary agent: 1%-3%;
Catalyzer: 0.01%-0.03%.
3. a kind of leather-making waste water as claimed in claim 2 is handled and is used coagulating agent, and it is characterized in that: the mass percent of each composition is:
Spent pickle liquor: 73%-85%;
Calcium aluminate: 13%-25%;
Auxiliary agent: 1%-2%;
Catalyzer: 0.01%-0.03%.
4. a kind of leather-making waste water as claimed in claim 3 is handled and is used coagulating agent, and it is characterized in that: the mass percent of each composition is:
Spent pickle liquor: 80%;
Calcium aluminate: 18.99%;
Auxiliary agent: 1%;
Catalyzer: 0.01%.
5. the treatment process of a leather-making waste water is characterized in that: mainly comprise the steps:
Preparation coagulating agent (1): earlier spent pickle liquor, calcium aluminate, auxiliary agent and catalyzer are mixed by a certain percentage, adopt steam to heat and stir simultaneously again and make coagulant special; Wherein, described auxiliary agent adopts pure aluminium silicate, and the composition of catalyzer mainly comprises glucose, VITAMIN, salt and iron trichloride, and spent pickle liquor comprises that following composition and each composition quality per-cent are: iron protochloride or ferrous sulfate 10-20%, hydrogenchloride 3-10%, surplus is a water;
Waste water quality, water balance (2): after synthetic leather wastewater imported equalizing tank inner equilibrium water quality, the water yield, enter reaction tank by sump pump;
Coagulating (3): in reaction tank, add about 2 ‰ coagulating agent of wastewater flow rate, carry out coagulating and enter the settling tank precipitation after being aided with coagulation condition;
Biochemical treatment (4): biochemical treatment is carried out in the water outlet of coagulating and post precipitation; With
Water outlet discharging (5): the water outlet after the biochemical treatment is discharged.
6. the treatment process of a kind of leather-making waste water as claimed in claim 5 is characterized in that: the mass percent of each composition is in the preparation coagulating agent (1):
Spent pickle liquor: 60%-90%;
Calcium aluminate: 8%-37%;
Auxiliary agent: 1%-3%;
Catalyzer: 0.01%-0.03%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101552866A CN101205091B (en) | 2006-12-18 | 2006-12-18 | Coagulating agent for treatment of leather-making waste water and leather-making waste water treating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101552866A CN101205091B (en) | 2006-12-18 | 2006-12-18 | Coagulating agent for treatment of leather-making waste water and leather-making waste water treating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101205091A CN101205091A (en) | 2008-06-25 |
| CN101205091B true CN101205091B (en) | 2010-09-29 |
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| CN102417275B (en) * | 2011-10-14 | 2013-09-25 | 浙江富春江环保热电股份有限公司 | System and method for comprehensive treatment of pickling process waste water and leather-making process waste water |
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| CN1463929A (en) * | 2002-06-06 | 2003-12-31 | 曹万印 | Process for producing composite coagulant polymeric aluminium chloride ferrum |
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| 于品一，丛玉红，候国生.用硫酸亚铁酸洗废液处理制革废水的工艺.黑龙江环境通报30 3.2006,30(3),49-50. |
| 于品一,丛玉红,候国生.用硫酸亚铁酸洗废液处理制革废水的工艺.黑龙江环境通报30 3.2006,30(3),49-50. * |
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Assignee: ZHEJIANG PINGHU GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co.,Ltd. Assignor: Zhang Jinhua Contract record no.: 2011330001450 Denomination of invention: Coagulating agent for treatment of leather-making waste water and leather-making waste water treating method Granted publication date: 20100929 License type: Exclusive License Open date: 20080625 Record date: 20111209 |
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