CN103787467A - Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method - Google Patents
Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method Download PDFInfo
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- CN103787467A CN103787467A CN201410034320.9A CN201410034320A CN103787467A CN 103787467 A CN103787467 A CN 103787467A CN 201410034320 A CN201410034320 A CN 201410034320A CN 103787467 A CN103787467 A CN 103787467A
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Abstract
The invention relates to equipment and process for treating nickel-cobalt wastewater in the hydrometallurgy industry through an electrolytic method. The equipment comprises an electrolytic pool with a wastewater inlet and a wastewater outlet formed in two ends respectively. The equipment is characterized in that multiple groups of positive plates and multiple groups of negative plates are arranged in the electrolytic pool at intervals in sequence and are respectively connected with a power supply through a power bus. When the equipment is used to treat the wastewater, the wastewater is pumped into the electrolytic pool from the wastewater inlet of the electrolytic pool at the flow rate of 0.05-0.08m<3>/min, the voltage between the positive plate and the negative plate of the electrolytic pool is set to be 2.6-3.0V, the current density is adjusted to be 60-120A/m<2>, the electrolytic time is controlled to be 30-50 minutes, tank liquor after electrolysis is filtered through a filter, and filter residues are collected.
Description
Technical field
The present invention relates to hydrometallurgy industry sewage treatment area, be specifically related to a kind of equipment and process of electrolytic process processing hydrometallurgy industry nickel cobalt sewage.
Background technology
Hydrometallurgy industry particularly nickel cobalt metallic substance smelt in, inevitably can adopt organic extractant to carry out the nickel cobalt metal ion in the enrichment aqueous solution, remaining liquid after being extracted becomes the waste water without utility value again, these industrial sewages not only pH value low, be rich in sodium-chlor, magnesium sulfate and nickel, cobalt inorganic salt, be also entrained with the organic extractant that affects water-quality COD and total phosphorus simultaneously.For the processing of this type of sewage, traditional purifying treatment mode as sulfuration coagulation, resin absorption, aeration, biochemical process etc. or loaded down with trivial details with flow process, operation is difficult to control, processing cost is too high, weak effect, easily form secondary pollution problems and be all difficult to obtain gratifying effect.
Summary of the invention
The defects such as, weak effect high to cost of sewage disposal in hydrometallurgy industry in prior art for solving and secondary pollution, the object of the present invention is to provide a kind of electrolytic process to process the equipment and process of hydrometallurgy industry nickel cobalt sewage.
For reaching above object, the technical scheme that the present invention takes is:
A kind of electrolytic process is processed the equipment of hydrometallurgy industry nickel cobalt sewage, comprise electrolyzer, the two ends of electrolyzer are respectively arranged with sewage import and outlet, described many group positive plates and many group negative plate alternative arrangements are arranged in electrolyzer, and described positive plate is connected with power supply through power source bus respectively with negative plate.
Further, between described positive plate and negative plate, be equipped with plastic cement bulkhead.
Further, described electrolyzer is airtight electrolyzer.
Again further, at the bottom of described negative plate and positive plate and electrolyzer pond, be provided with gap.
Again further, described power supply is direct supply.
A kind of right to use requires the method for the device processes sewage of electrolytic process processing hydrometallurgy industry nickel cobalt sewage described in 1 to be,
(1) sewage is pumped into electrolyzer from the sewage import of electrolyzer with 0.05-0.08m3/min flow, between electrolytic cell anode plate and negative plate, voltage is located at 2.6-3.0V, and current density is adjusted to 60-120A/ ㎡, electrolysis 30-50min.
(2) tank liquor of electrolysis after completing is filtered, and collects filter residue.
Take after above technical scheme, beneficial effect of the present invention is:
Electrolytic process is processed an equipment for hydrometallurgy industry nickel cobalt sewage, possesses following advantage:
Little, the facility of floor space drop into and running cost low: this process facility drops into and only needs one (about Siping City rice) or several totally-enclosed electrolyzers and water body transfer tank.
2. short, the artificial less investment of technical process, simple to operate, labour intensity is little, processing efficiency is high: when work, only sewage need be pumped in electrolyzer, set flow velocity, bath voltage and current density, need not special messenger manage and protect.
3. treating processes is little to environmental influence, and what electrolyzer adopted is fully-closed operation system, need not add again other assistant medicament in process, has also just avoided the secondary pollution that human and environment is caused.
The technique that a kind of electrolytic process is processed hydrometallurgy industry nickel cobalt sewage possesses following advantage:
1. sour water is adjusted to neutrality: in the bath voltage of setting and current density range, utilize the ionization of water molecules and the reaction that negative electrode exists: H
2o OH
-+ H
+, 2H
++ 2e=H
2make hydrogen ion that part hydrogen ion free in former water and ionization produce resolve to hydrogen at negative electrode and overflow, thus superfluous hydroxide ion with former water in remaining hydrogen ion recombine generate water molecules to make pH value be that the sour water of 4.0 left and right is analysed nature by electrolysis and is adjusted to neutral range.
2. separation and the recovery of nickel, cobalt metallic cation: in the process of analysing in electrolysis, negative plate face also exists R simultaneously
2+the reaction process of+2e=R, positive plate district also exists R
2+-e+3OH
-=R (OH)
,r (OH)
3-H
2the reaction (R represents nickel, cobalt element at this) of O=ROOH; By the reaction formula of nickel cobalt metal ion two interpolars in electrolyzer, nickel cobalt ion can both be separated out with different state depositions respectively from the aqueous solution in yin, yang pole plate region.After this tank liquor of discharging is filtered, nickel cobalt is not only reclaimed again, and water body has also obtained purification simultaneously.
3. reduced and affected the COD of water quality value, organophosphorus and chloride ion content: except above electrochemical reaction, also existed Cl in positive plate district
---e=Cl, Cl+Cl=Cl
2this process, be that first part chlorion in water body is reduced into chlorine atom at anode, then chlorine atom is combined into again chlorine, and the micro-hypochlorous acid that chlorine atom, chlorine and chlorine and water molecule reaction generate has extremely strong oxidisability, by the microorganism in water body, part Organic oxidation and decompose the phosphoric acid salt etc. that makes it to form carbonic acid gas, water, inorganic indissoluble, thus direct or indirect reduction COD value, organophosphorus and chlorion in water.
4. suspension greasy dirt particle aggregation: pending sewage is filling after electrolyzer energising, the small hydrogen, the chlorine bubbles that on yin, yang pole plate, produce can, by the supporting of greasy dirt particulate, form the oil lamella that is easy to collecting.
To sum up, the equipment and process sewage nickel after treatment cobalt concentration that a kind of electrolytic process is processed hydrometallurgy industry nickel cobalt sewage can be less than that 0.5mg/L, pH value rise to 6.0～7.6, COD value can be down to below 200mg/L, organophosphorus can be down to below 3mg/L, and in water, oil content is also reduced to below 10mg/L simultaneously; The nickel cobalt slag reclaiming has that impurity is low, content is high, quality better.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention figure.
In figure: power source bus 1, sewage import 2, electrolyzer 3, positive plate 4, plastic cement bulkhead 5, negative plate 6, sewage outlet 7.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described:
As shown in the figure, the equipment that a kind of electrolytic process is processed hydrometallurgy industry nickel cobalt sewage comprises power source bus 1, sewage import 2, electrolyzer 3, positive plate 4, plastic cement bulkhead 5, negative plate 6 and sewage outlet 7, described electrolyzer 3 is airtight electrolyzer, its left and right sides is respectively equipped with sewage import 2 and sewage outlet 7, in electrolyzer, be provided with six groups of positive plates 4 and five groups of negative plates 6, described positive plate 4 and negative plate 6 is alternately uniformly-spaced in the parallel draw-in groove being flush-mounted on electrolyzer 3 inwalls, cloudy, positive plate is respectively through power source bus 1 and direct supply conducting, bottom and the electrolyzer of positive plate 4 and negative plate 6 are provided with gap, between described adjacent cathode plate 6 and positive plate 4, be provided with plastic cement bulkhead 5, described plastic cement bulkhead 5 is flush-mounted in the draw-in groove on electrolyzer 3 inwalls.
The technique that this electrolyzer is disposed of sewage comprises the following steps:
(1) by sewage collecting to liquid storage tank, and sampling detect each pollutant load;
(2) sewage in liquid storage tank is pumped in electrolyzer according to the flow velocity of 0.05～0.08m3/min, under the bath voltage of 2.6～3.0V and the current density of 60～120A/ ㎡, carry out electrolysis 30-50min, raffinate after electrolysis is discharged and is filtered through sewage outlet, filter residue is that nickel cobalt slag is recycled again, and filtrate is the sewage after purification.
Embodiment 1
To pump in electrolyzer with the flow velocity of 0.06m3/min containing the sewage of Ni 52.6mg/L, Co 14.3mg/L, PH 3.85, the organic 5.7mg/L of COD 426.4mg/L, P, oil content 21.7mg/L, setting slot voltage 2.9V, regulate current density 108.52 A/ ㎡, electrolysis 30min, after electrolysis, liquid detects after filtration, records oil content 7.3mg/L in Ni:0.25mg/L in filtrate, Co:0.20mg/L, PH7.37, COD106.5mg/L, the organic 1.9mg/L of P, water.
To pump in electrolyzer with the flow velocity of 0.08m3/min containing the sewage of Ni 90.4mg/L, Co 19.5mg/L, PH 3.62, the organic 11.9mg/L of COD 956.4mg/L, P, oil content 43.3mg/L, setting slot voltage 2.6V, regulate current density 60.34 A/ ㎡, electrolysis 35min, after electrolysis, liquid detects after filtration, records oil content 9.4mg/L in Ni:0.46mg/L in filtrate, Co:0.34mg/L, PH6.75, COD195.2mg/L, the organic 2.8mg/L of P, water.
Embodiment 3
To pump in electrolyzer with the flow velocity of 0.07m3/min containing the sewage of Ni 136.2mg/L, Co 51.6mg/L, PH 3.81, the organic 8.7mg/L of COD 673.8mg/L, P, oil content 29.6mg/L, setting slot voltage 3.0V, regulate current density 105.16 A/ ㎡, electrolysis 40min, after electrolysis, liquid detects after filtration, records oil content 7.8mg/L in Ni:0.39mg/L in filtrate, Co:0.31mg/L, PH7.29, COD134.6mg/L, the organic 2.3mg/L of P, water.
To pump in electrolyzer with the flow velocity of 0.06m3/min containing the sewage of Ni 217.5mg/L, Co 68.3mg/L, PH 4.37, the organic 7.9mg/L of COD 526.4mg/L, P, oil content 25.3mg/L, setting slot voltage 2.8V, regulate current density 87.72 A/ ㎡, electrolysis 45min, after electrolysis, liquid detects after filtration, records oil content 6.9mg/L in Ni:0.43mg/L in filtrate, Co:0.37mg/L, PH6.89, COD140.4mg/L, the organic 2.1mg/L of P, water.
To pump in electrolyzer with the flow velocity of 0.05m3/min containing the sewage of Ni 283.7mg/L, Co 108.4mg/L, PH 4.46, the organic 8.2mg/L of COD 762.5mg/L, P, oil content 34.1mg/L, setting slot voltage 2.7V, regulate current density 119.06 A/ ㎡ electrolysis 50min, after electrolysis, liquid detects after filtration, records oil content 8.1mg/L in Ni:0.45mg/L in filtrate, Co:0.39mg/L, PH7.15, COD133.7mg/L, the organic 2.6mg/L of P, water.
Claims (6)
1. the equipment of an electrolytic process processing hydrometallurgy industry nickel cobalt sewage, comprise electrolyzer, the two ends of electrolyzer are respectively arranged with sewage import and sewage outlet, it is characterized in that, in described electrolyzer, be provided with many group positive plates and many group negative plates, described many group positive plates and many group negative plates arrange at interval successively, and described positive plate is connected with power supply through power source bus respectively with negative plate.
2. a kind of electrolytic process according to claim 1 is processed the equipment of hydrometallurgy industry nickel cobalt sewage, it is characterized in that, is provided with plastic cement bulkhead between described positive plate and negative plate.
3. a kind of electrolytic process according to claim 1 is processed the equipment of hydrometallurgy industry nickel cobalt sewage, it is characterized in that, described electrolyzer is airtight electrolyzer.
4. a kind of electrolytic process according to claim 1 is processed the equipment of hydrometallurgy industry nickel cobalt sewage, it is characterized in that, described negative plate, positive plate, plastic cement bulkhead all with at the bottom of electrolyzer pond leave gap.
5. a kind of electrolytic process according to claim 1 is processed the equipment of hydrometallurgy industry nickel cobalt sewage, it is characterized in that, described power supply is direct supply.
6. a right to use requires the technique of the device processes sewage of electrolytic process processing hydrometallurgy industry nickel cobalt sewage described in 1 to be,
Sewage is pumped into electrolyzer from the sewage import of electrolyzer with 0.05-0.08m3/min flow, between electrolytic cell anode plate and negative plate, voltage is 2.6-3.0V, and current density is adjusted to 60-120A/ ㎡, electrolysis 30-50min, tank liquor after electrolysis completes is filtered, and collects filter residue.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034320.9A CN103787467A (en) | 2014-01-24 | 2014-01-24 | Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method |
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|---|---|---|---|
| CN201410034320.9A CN103787467A (en) | 2014-01-24 | 2014-01-24 | Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method |
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| CN201410034320.9A Pending CN103787467A (en) | 2014-01-24 | 2014-01-24 | Equipment and process for treating nickel-cobalt wastewater in hydrometallurgy industry through electrolytic method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101163A (en) * | 2017-12-21 | 2018-06-01 | 衢州华友钴新材料有限公司 | It is a kind of that valuable metal is recycled from industrial wastewater and drops ammonia nitrogen and the method for COD |
| CN111087049A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organic nitrogen wastewater |
| CN111087048A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organophosphorus wastewater |
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|---|---|---|---|---|
| CN1098385A (en) * | 1993-08-01 | 1995-02-08 | 胡扬五 | Electric filtering type water purifier |
| US20030102211A1 (en) * | 2001-12-04 | 2003-06-05 | Shinichi Nakamura | Electrolyzer |
| CN101717135A (en) * | 2009-12-04 | 2010-06-02 | 浙江师范大学 | Method for treating nickel-containing electroplating wastewater and recovering nickel by electrolysis |
| CN201785506U (en) * | 2010-07-08 | 2011-04-06 | 江苏凯力克钴业股份有限公司 | Electrodeposition tank |
-
2014
- 2014-01-24 CN CN201410034320.9A patent/CN103787467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098385A (en) * | 1993-08-01 | 1995-02-08 | 胡扬五 | Electric filtering type water purifier |
| US20030102211A1 (en) * | 2001-12-04 | 2003-06-05 | Shinichi Nakamura | Electrolyzer |
| CN101717135A (en) * | 2009-12-04 | 2010-06-02 | 浙江师范大学 | Method for treating nickel-containing electroplating wastewater and recovering nickel by electrolysis |
| CN201785506U (en) * | 2010-07-08 | 2011-04-06 | 江苏凯力克钴业股份有限公司 | Electrodeposition tank |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101163A (en) * | 2017-12-21 | 2018-06-01 | 衢州华友钴新材料有限公司 | It is a kind of that valuable metal is recycled from industrial wastewater and drops ammonia nitrogen and the method for COD |
| CN108101163B (en) * | 2017-12-21 | 2020-11-03 | 衢州华友钴新材料有限公司 | Method for recovering valuable metals and reducing ammonia nitrogen and COD (chemical oxygen demand) from industrial wastewater |
| CN111087049A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organic nitrogen wastewater |
| CN111087048A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organophosphorus wastewater |
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Application publication date: 20140514 |