CN104163517A - Comprehensive harmless treatment and recycling method for chromium-containing wastewater on electrolytic tinplate production line - Google Patents
Comprehensive harmless treatment and recycling method for chromium-containing wastewater on electrolytic tinplate production line Download PDFInfo
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- CN104163517A CN104163517A CN201310526407.3A CN201310526407A CN104163517A CN 104163517 A CN104163517 A CN 104163517A CN 201310526407 A CN201310526407 A CN 201310526407A CN 104163517 A CN104163517 A CN 104163517A
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Abstract
The invention discloses a comprehensive harmless treatment and recycling method for chromium-containing wastewater on an electrolytic tinplate production line. The method comprises the following treatment steps: (1) inputting the chromium-containing wastewater into a filtering device for filtering; (2) inputting the filtered wastewater into an oxidization bed for treating; (3) inputting the wastewater treated by the oxidization bed into a dechromization bed for treating; (4) inputting the wastewater treated by the dechromization bed into a purification bed for treating; and (5) inputting the wastewater treated by the purification bed into a reduction bed for treating. The comprehensive harmless treatment and recycling method has the beneficial effects of safe and reliable treatment process, easiness in running and maintenance, reasonable equipment design, superior performance, high controllability, high automation degree, attractive and elegant layout of equipment, convenience in operation and management, reasonable investment and running cost and low treatment cost.
Description
Technical field
The present invention relates to field of waste water treatment, specifically the comprehensive harmless treatment reuse method of a kind of electrolytic tinplate production line chromate waste water.
Background technology
The a large amount of chromate waste water of the every average annual discharge of plating, process hides and Chrome Salt Industry.Wherein, only the quantity discharged of electroplating wastewater just reaches 4,000,000,000 m
3/ a(cubic meter is annual).The harmless treatment of chromate waste water is one of indispensable process procedure of above-mentioned commercial run.
The existence form of the chromium of waste electroplating liquor containing chromium has Cr
6+and Cr
3+two kinds, wherein with Cr
6+toxicity maximum.It is acid that waste electroplating liquor containing chromium is, and chromium ion is mainly with CrO
4 2-and CrO
7 2-form exist.Cr (VI) toxicity is larger, skin to human body, mucous membrane, upper respiratory system has stronger pungency and corrodibility, after being absorbed by the body, there is danger carcinogenic and modificator gene sudden change, chromate waste water severe contamination water source, soil, destroy ecotope, therefore electroplating the highest permission emission concentration that pollutant emission standard > > (GB21900-2008) strictly limits Cr (VI) is 0.2mg/L, and the discharge provincial standard of 2010 more strict ([2010] No. 86 files of fringe ring), the highest permission emission concentration of restriction Cr (VI) is not for detecting.
The sexavalent chrome that contains higher concentration in the waste water that Passivation Treatment operation in electrolytic tinplate production technique produces, sexavalent chrome (Cr
6+) be a kind of environmentally harmful heavy metal ion.Due to Cr
6+at nature, can not be decomposed by microorganism, and infiltration migration is stronger, human body is had to strong sensitization and carcinogenesis, and have a strong impact on the growth of farm crop, belong to first kinds of pollution matter, national regulation strict emission standard (ρ (Cr
6+) <0.2mg/L) < < electroplates pollutant emission standard > > (GB21900-2008), therefore, Cr
6+pollution abatement also just become efforts at environmental protection person's important topic.
The treatment process of chromate waste water is more, and conventional have chemical method, electrolytic process, an ion exchange method etc.Generally speaking, containing Cr
6+the improvement method of waste water has summed up 5 kinds: 1. reduction method, the 2. precipitator method, 3. thickening-purification technology method, 4. membrane concentration method and 5. ion exchange method.Front 2 kinds of methods are applicable to a small amount of chromate waste water to be processed, and administers and is difficult for thoroughly, and have secondary pollution; The third method is administered the most effective, but technical qualification and material requirements are high, invest larger; Membrane concentration method be grew up in recent years to the comparatively effective treatment process of chromate waste water, but be generally applicable to the situation of the chromate waste water dope recoverable of lower concentration, and require the purity of chromium water better, pretreatment technology is more complicated, technical qualification require high, invest larger; Ion exchange method is the technique of comparative maturity, but the reason not coming into vogue on heavy metal is processed is a lot, the quality and the function that are mainly adaptive exchange resin do not catch up with, the develop rapidly of researching and developing along with manufacturing processing technic, macromolecular material in recent years, the appearance of high-quality macropore exchange resin, effective processing of heavy metal has brought light.
Electrolytic tinplate production technique section approximately has chromate waste water in line to sewage treatment facility, ρ (Cr in its waste water
6+) reach 40～350mg/L.The chromate waste water producing every day, through raw waste water facility mix, coagulating sedimentation outer row after processing, ρ (Cr in efflux wastewater
6+) unstable, surpass sometimes 0.2mg/L, because wastewater treatment sludge quantity is larger, environment is easily produced to detrimentally affect simultaneously.
Summary of the invention
The present invention seeks to the deficiency existing for the above existing Technology, a kind for the treatment of process that reduces carrying capacity of environment is provided, meet emission request and can reach the zero comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water polluting.
For achieving the above object, technical scheme of the present invention is: the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water, and its treatment step comprises:
(1) chromate waste water is filtered by input filtration unit;
(2) the waste water input oxidation bed after filtering is processed;
(3) the de-chromium bed of waste water input after oxidation bed processing is processed;
(4) the waste water input purifying bed after de-chromium bed processing is processed;
(5) the waste water input reduction bed after the processing of purifying bed is processed.
Minimum deep bed filter and the activated charcoal filter of comprising of described filtration unit, described waste water first enters activated charcoal filter and filters after deep bed filter filters.
Described oxidation bed is connected with acid tank, and splendid attire sulfuric acid in described acid tank, for carrying out regeneration washing to oxidation bed.
Described de-chromium bed is connected with the first regenerating unit, and splendid attire sulfuric acid in described the first regenerating unit, for carrying out regeneration washing to de-chromium bed.
Described purifying bed is connected with the second regenerating unit, and splendid attire sodium hydroxide in described the second regenerating unit, carries out regeneration washing for purifying bed.
Described reduction bed is connected with alkali groove, and splendid attire sodium hydroxide in described alkali groove, for carrying out regeneration washing to reduction bed.
The regenerated liquid of described oxidation bed and described de-chromium bed mixes with the regenerated liquid of described purifying bed and described reduction bed after neutralization, through evaporator evaporation aftertreatment; Wherein harmful solid waste is recovered, and evaporated liquor is back to chrome waste liquid and carries out circular treatment.
Described chromate waste water is collected in storage tank, then by filtering in force (forcing) pump group input filtration unit.
Compared with the prior art, the invention has the beneficial effects as follows: treatment process safety, reliable, running maintenance is simple; Equipment is reasonable in design, superior performance, controllability is good, level of automation is high; Device layout is elegant in appearance, convenient operation management; Investment and working cost are reasonable, and processing cost is low, and environmental benefit is high.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water of the present invention;
Embodiment
Below in conjunction with as figure and specific embodiment the present invention will be described in detail.
Principle explanation
Ion exchange is that a kind of material that is called ion-exchanger carries out, by means of the ion in Solid-state Ion-exchange agent and the ion in dilute solution, exchange, to reach the object of extracting or removing some ion in solution, it is a kind of unit operation that belongs to mass transfer sepn process; Ion-exchange is reversible equivalent permutoid reaction.
Ion exchange resin is a kind of high molecular polymkeric substance, has the advantages that exchange capacity is high, profile is mostly spherical particle, and flow resistance is little, physical strength high chemical stability is good.
This case needs chrome waste liquid to be processed mainly sodium dichromate 99 and a small amount of trivalent chromium, to consist of, and has following chemical equilibrium feature (part):
Na
2Cr
2O
7+2H
+＝＝H
2Cr
2O
7+2Na
+
H
2Cr
2O
7+OH
-＝＝2H
2O+Cr
2O
7 2-
Trivalent chromium is hydrolyzed in pH value 3.0 left and right sour environments, is oxidized to sexavalent chrome (chromic acid), forms chromic acid, further forms dichromic acid,
Cr
2O
3+H
2O+H
+→H
2CrO
4+H
+→H
2Cr
2O
7
The mechanism of ion exchange resin
2ROH+Cr
2O
7 2-→R
2Cr
2O
7 2-+2OH
2-
HR+Na
+→NaR+H
+
Regeneration mechanism
H
2sO
4(dense)+2NaR → 2HR+Na
2sO
4
2NaOH (dense)+R
2cr
2o
7 2-→ 2ROH+Na
2cr
2o
7 2-
The comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water, as shown in Figure 1, its treatment step comprises:
(1) chromate waste water is collected in to storage tank, then by force (forcing) pump group input filtration unit, filters; Minimum deep bed filter and the activated charcoal filter of comprising of described filtration unit, described waste water first enters activated charcoal filter and filters after deep bed filter filters.Wherein, the elutriant of above-mentioned strainer returns and in chromate waste water storage tank, carries out circular treatment;
(2) the waste water input oxidation bed after filtering is processed;
(3) the de-chromium bed of waste water input after oxidation bed processing is processed;
(4) the waste water input purifying bed after de-chromium bed processing is processed;
(5) the waste water input reduction bed after the processing of purifying bed is processed.
Waste water after reduction bed is processed can reach discharging standards, and can in electrolytic tinplate production process, carry out recycle by direct reuse.
Described oxidation bed is connected with acid tank, and splendid attire sulfuric acid in described acid tank, for oxidation bed is carried out to regeneration washing, makes it can follow bad utilization.Described de-chromium bed is connected with the first regenerating unit, and splendid attire sulfuric acid in described the first regenerating unit, for de-chromium bed is carried out to regeneration washing, makes it can follow bad utilization.Described purifying bed is connected with the second regenerating unit, and splendid attire sodium hydroxide in described the second regenerating unit, carries out regeneration washing for purifying bed, makes it can follow bad utilization.Described reduction bed is connected with alkali groove, and splendid attire sodium hydroxide in described alkali groove, for reduction bed is carried out to regeneration washing, makes it can follow bad utilization.The regenerated liquid of described oxidation bed and described de-chromium bed (sulfuric acid) mixes with the regenerated liquid (sodium hydroxide) of described purifying bed and described reduction bed after neutralization, by evaporator evaporation, process, chromium acid waste liquid first extracts to transfer tank in advance through transferpump, then inputs filtration unit and filters.Wherein, the transfer lime using adopts stainless steel (SUS304) steel pipe of DN80, at transferpump output position mounting pipe wind cooling temperature lowering equipment, in addition some transfer tanks can also be set, at described transfer tank entry position same mounting pipe wind cooling temperature lowering equipment, guarantee that chromium acid waste liquid temperature drops to below 40 ℃, to guarantee the activity of exchange resin, maintains treatment effect.Wherein, storage tank is used for collecting chromium acid waste liquid, and as technique buffer point.
Described force (forcing) pump group is mainly used in extracting the liquid of chrome waste liquid in transfer tank, for ion exchange system provides operation power.Force (forcing) pump group is comprised of two corrosion-resistant stainless steel water pumps, a wherein use, and another is standby.The CDLF type pump that described corrosion-resistant stainless steel water pump can be Nanfang Pump Industry Co., Ltd., and described force (forcing) pump group is also for the backwash of activated charcoal filter.
Described deep bed filter is for the preliminary suspended solid of removing chrome waste liquid; Deep bed filter consists of filter bag, filter basket, container three parts, and filter bag is installed in filter frame, and described filter frame is installed on described container internal upper part.Described deep bed filter is easy, efficient, an economic filtering system, has the features such as novel and reasonable structure, good airproof performance, circulating capacity be strong, easy and simple to handle.50 microns of above filter bags of the preferred filtering accuracy of described deep bed filter, the material of filter bag is nylon, chemical compatibility is good, easy cleaning, container adopts the manufacture of SUS304 all steel.Filter bag arranges by the sealed fast-open type of lifting eye bolt with filter basket.Wherein, deep bed filter divides two-stage setting, and the effect of first step deep bed filter is to prevent that in stoste, oarse-grained solids leaks; Second stage deep bed filter is the multiple protective while preventing that the broken thing of the possible gac of activated charcoal filter and the first step deep bed filter from being penetrated.
Described activated charcoal filter is used for filtering and adsorbing the colloidal solid thing that may impact resins exchange body.Described activated charcoal filter is the activated charcoal filter of one group of steel rubber lining tank body preferably, and flow velocity design can be 20m/hr, and it is tank body interior filling grating quartz sand thickness and the high-quality column sintering activity charcoal of full diameter φ 1250mm.When strainer inlet outlet pressure differential reaches certain value (0.55-0.75), through differential pressure controller, judge, carry out backwash, backwash time 5-10min, backwash waste is disposed to the transfer tank of chrome waste liquid.Charcoal filter adopts pneumavalve to control, utilize in PLC control to realize operation automatically and just wash, backwash function.
Described oxidation bed Main Function is by the Cr in chrome waste liquid
3+, Cr
6+be converted into dichromate ion Cr
2o
7 2-; The oxidation bed body that adopts one group of steel rubber lining tank body, flow velocity is designed to 20m/hr, tank diameter φ 1250mm; The macropore strong acid cation exchange resin that filling model is D72,3300 liters of resin loadings (single tank).Oxidation bed adopts the higher counter-current regeneration form of performance, and regeneration efficiency is high, and salt consumption is 0.5-0.75 times of common fixed bed.Oxidation bed adopts ORP, pH dual control detecting pattern, provides data and finishes to judge efficiency lost resin, regeneration ending, cleaning, and send instruction by central controller image data, reaches the automatic operating of operation, regeneration, cleaning; Regeneration dope drains into regenerated liquid neutralizing well; Scavenging solution drains into scavenging solution storage tank (acid) to increase operation rate, scavenging period 5-10min.C1 oxidation bed adopts two-position controller, pneumavalve to control, and realization moves and just washes, backwash function.The features such as model is the macropore strong acid cation exchange resin of D72, is the ion exchange resin of macroporous structure, and it is high that it has exchange capacity, and exchange velocity is fast, and physical strength is good, are mainly used in the recovery of wastewater treatment and heavy metal.Its physical and chemical index is as following table:
Described de-chromium bed Main Function is exchange Cr
2o
7 2-; There is dual efficiency; The de-chromium bed body that adopts one group of steel rubber lining tank body, flow velocity is designed to 20m/hr, tank diameter φ 1250mm, 1700 liters of resin loadings (single tank); Filling strong basicity macroporous anion exchange resin in described steel rubber lining tank body.De-chromium bed adopts the higher counter-current regeneration form of performance, and regeneration efficiency is high, and salt consumption is 0.5-0.75 times of common fixed bed.De-chromium bed adopts ORP, pH dual control detecting pattern, provides data and finishes to judge efficiency lost resin, regeneration ending, cleaning, and send instruction by central controller image data, reaches the automatic operating of operation, regeneration, cleaning; Regeneration dope drains into regenerated liquid neutralizing well; Scavenging solution drains into scavenging solution storage tank (acid) to increase operation rate, scavenging period 5-10min.The de-chromium bed of A1 adopts two-position controller, pneumavalve to control, and realization moves and just washes, backwash function.
Described strong basicity macroporous anion exchange resin has that regeneration efficiency is high, alkaline consumption is low, water consumption is low, exchange capacity is large, anti-Organic pollutants and the feature such as resistance of oxidation is strong, physical strength is good; Will be for the processing of electroplating industry chromate waste water and noble metal recovery etc.Its physical and chemical index is as following table:
Described purifying bed Main Function is for exchanging remaining positively charged ion, and cooperation reduction bed below reaches the object of purified water; The purifying bed body that adopts one group of steel rubber lining tank body, flow velocity is designed to 20m/hr, tank diameter φ 1250mm; Described steel rubber lining tank body loads the macropore strong acid cation exchange resin that strong model is D72,1800 liters of resin loadings (single tank); Water distribution system adopts the dull and stereotyped single speed water distribution system of high-quality, and water distribution evenly should not be revealed.Purifying bed adopts the higher counter-current regeneration form of performance, and regeneration efficiency is high, and salt consumption is 0.5-0.75 times of common fixed bed.C2 purifying bed adopts specific conductivity, pH dual control detecting pattern, provides data and finishes to judge efficiency lost resin, regeneration ending, cleaning, and send instruction by central controller image data, reaches the automatic operating of operation, regeneration, cleaning; Regeneration dope drains into regenerated liquid neutralizing well; Scavenging solution drains into scavenging solution storage tank (acid) to increase operation rate, scavenging period 5-10min.The de-chromium bed of A1 adopts two-position controller, pneumavalve to control, and realization moves and just washes, backwash function.
The features such as model is the macropore strong acid cation exchange resin of D72, is the ion exchange resin of macroporous structure, and it is high that it has exchange capacity, and exchange velocity is fast, and physical strength is good, are mainly used in the recovery of wastewater treatment and heavy metal.Its physical and chemical index is as following table:
Described reduction bed Main Function is the remaining negatively charged ion of exchange, and cooperation purifying bed above reaches the object of purified water; The purifying bed body that adopts one group of steel rubber lining tank body, flow velocity is designed to 20m/hr, tank diameter φ 1250mm; The macropore strong acid cation exchange resin that described steel rubber lining tank body filling high-quality model is D72,1800 liters of resin loadings (single tank).Reduction bed adopts the higher counter-current regeneration form of performance, and regeneration efficiency is high, and salt consumption is 0.5-0.75 times of common fixed bed.Reduction bed adopts specific conductivity, pH dual control detecting pattern, provides data and finishes to judge efficiency lost resin, regeneration ending, cleaning, and send instruction by central controller image data, reaches the automatic operating of operation, regeneration, cleaning; Regeneration dope drains into regenerated liquid neutralizing well; Scavenging solution drains into scavenging solution storage tank (alkali) to increase operation rate, scavenging period 5-10min.Reduction bed employing two-position controller, pneumavalve are controlled, and realization moves and just washes, backwash function.The features such as model is the macropore strong acid cation exchange resin of D72, is the ion exchange resin of macroporous structure, and it is high that it has exchange capacity, and exchange velocity is fast, and physical strength is good, are mainly used in the recovery of wastewater treatment and heavy metal.Its physical and chemical index is as following table:
The pure water that scavenging pump is mainly used in extracting pure water tank cleans the resin in resin bed; In order to guarantee that operating performance adopts stainless steel water pump, can select the CHL pump of Nanfang Pump Industry Co., Ltd., totally 2/cover, an application, another is standby.This storage tank major storage regeneration acid solution of acid storage tank, adopts FRP storage tank, volume 30m
3.Alkali storage tank major storage regeneration alkali lye, adopts FRP storage tank, volume 30m
3.
The first regenerating unit is comprised of chemical pump, injector, liquid distribution system, system of pipe and valve.The SZ series corrosion-proof type fluoroplastic pump that chemical pump can adopt Nanfang Pump Industry Co., Ltd. to produce, safe and reliable to operation; Injector is in order to draw the liquid of acid tank and scavenging solution storage tank (acid), and regulates proportioning to reach suitable pH value; Liquid distribution system is evenly delivered to resin layer by the good regenerated liquid (acid) of proportioning, adopts high-quality corrosion-proof type ABS material to make; System of pipe and valve adopts high-quality U-PVC chemical pipeline.
The second regenerating unit is comprised of chemical pump, injector, liquid distribution system, system of pipe and valve.The SZ series corrosion-proof type fluoroplastic pump that chemical pump adopts Nanfang Pump Industry Co., Ltd. to produce, safe and reliable to operation; Injector is in order to draw the liquid of acid tank and scavenging solution storage tank (alkali), and regulates proportioning to reach suitable pH value; Liquid distribution system is evenly delivered to resin layer by the good regenerated liquid (alkali) of proportioning, adopts high-quality corrosion-proof type ABS material to make; System of pipe and valve adopts high-quality U-PVC chemical pipeline, and pipe valve is selected Taiwan ring fine jade pipe valve.
Scavenging solution storage tank (acid) is mainly used in the recycling of scavenging solution, reduces water consumption, can make full use of the remaining regenerator in scavenging solution simultaneously.A scavenging solution storage tank of system design (acid), FRP material, volume can be 50m
3.Scavenging solution storage tank (alkali) is mainly used in the recycling of scavenging solution, reduces water consumption, can make full use of the remaining regenerator in scavenging solution simultaneously.A native system design scavenging solution storage tank (alkali), FRP material, volume can be 50m
3.Regeneration dope neutralizing well is the mixing point of acid-alkali regeneration liquid, FRP material, and volume can be 50m
3* 2.Pure water storage tank is used for storing pure water, in order to recycling; SUS304 built-up type, volume can be 50m
3* 2.
Acid
More than describe preferred embodiment of the present invention in detail, should be appreciated that the ordinary skill of this area just can design according to the present invention be made many modifications and variations without creative work.Therefore, all technician in the art according to the present invention design on prior art basis by logic analysis, reasoning or according to the available technical scheme of limited experiment, all should be among the determined protection domain by these claims.
Claims (8)
1. the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water, is characterized in that, its treatment step comprises:
(1) chromate waste water being inputted to filtration unit filters;
(2) the waste water input oxidation bed after filtering is processed;
(3) the de-chromium bed of waste water input after oxidation bed processing is processed;
(4) the waste water input purifying bed after de-chromium bed processing is processed;
(5) the waste water input reduction bed after the processing of purifying bed is processed.
2. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 1, it is characterized in that, minimum deep bed filter and the activated charcoal filter of comprising of described filtration unit, described waste water first enters activated charcoal filter and filters after deep bed filter filters.
3. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 2, it is characterized in that, described oxidation bed is connected with acid tank, and splendid attire sulfuric acid in described acid tank, for carrying out regeneration washing to oxidation bed.
4. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 2, it is characterized in that, described de-chromium bed is connected with the first regenerating unit, and splendid attire sulfuric acid in described the first regenerating unit, for carrying out regeneration washing to de-chromium bed.
5. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 2, it is characterized in that, described purifying bed is connected with the second regenerating unit, and splendid attire sodium hydroxide in described the second regenerating unit, carries out regeneration washing for purifying bed.
6. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 2, it is characterized in that, described reduction bed is connected with alkali groove, and splendid attire sodium hydroxide in described alkali groove, for carrying out regeneration washing to reduction bed.
7. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water described in claim 3,4,5 or 6, it is characterized in that, the regenerated liquid of described oxidation bed and described de-chromium bed mixes with the regenerated liquid of described purifying bed and described reduction bed after neutralization, through evaporator evaporation, processes.
8. according to the comprehensive harmless treatment reuse method of electrolytic tinplate production line chromate waste water claimed in claim 1, it is characterized in that, described chromate waste water is collected in storage tank, then by filtering in force (forcing) pump group input filtration unit.
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|---|---|---|---|
| CN201310526407.3A CN104163517A (en) | 2013-10-30 | 2013-10-30 | Comprehensive harmless treatment and recycling method for chromium-containing wastewater on electrolytic tinplate production line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417779A (en) * | 2015-11-30 | 2016-03-23 | 镇江亿海精密仪器设备有限公司 | Treatment equipment for wastewater containing heavy metal ions |
| CN109399714A (en) * | 2018-12-29 | 2019-03-01 | 长沙兴嘉生物工程股份有限公司 | A method of chromium sulfate basic is prepared with chromate waste water |
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| CN102120660A (en) * | 2011-02-17 | 2011-07-13 | 江门市崖门新财富废水处理有限公司 | Chromium-ion containing wastewater treatment process and device thereof |
| CN103172191A (en) * | 2011-12-20 | 2013-06-26 | 上海巴安水务股份有限公司 | Whole coal chemical industry plant condensate water processing system |
| CN103693773A (en) * | 2013-10-10 | 2014-04-02 | 广州太平洋马口铁有限公司 | Chromium-containing waste water reuse treatment method |
-
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|---|---|---|---|---|
| JP3272216B2 (en) * | 1995-10-23 | 2002-04-08 | 新日本製鐵株式会社 | Treatment of chromium-containing wastewater |
| CN102120660A (en) * | 2011-02-17 | 2011-07-13 | 江门市崖门新财富废水处理有限公司 | Chromium-ion containing wastewater treatment process and device thereof |
| CN103172191A (en) * | 2011-12-20 | 2013-06-26 | 上海巴安水务股份有限公司 | Whole coal chemical industry plant condensate water processing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417779A (en) * | 2015-11-30 | 2016-03-23 | 镇江亿海精密仪器设备有限公司 | Treatment equipment for wastewater containing heavy metal ions |
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| CN109399714A (en) * | 2018-12-29 | 2019-03-01 | 长沙兴嘉生物工程股份有限公司 | A method of chromium sulfate basic is prepared with chromate waste water |
| CN109399714B (en) * | 2018-12-29 | 2021-06-22 | 长沙兴嘉生物工程股份有限公司 | Method for preparing basic chromium sulfate from chromium-containing wastewater |
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