CN208869412U - The processing system of chromate waste water - Google Patents

The processing system of chromate waste water Download PDF

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Publication number
CN208869412U
CN208869412U CN201821292711.0U CN201821292711U CN208869412U CN 208869412 U CN208869412 U CN 208869412U CN 201821292711 U CN201821292711 U CN 201821292711U CN 208869412 U CN208869412 U CN 208869412U
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CN
China
Prior art keywords
pond
waste water
order reaction
membrane
conditioning tank
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Expired - Fee Related
Application number
CN201821292711.0U
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Chinese (zh)
Inventor
陆文华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Yang And Environmental Technology Co Ltd
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Suzhou Yang And Environmental Technology Co Ltd
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Priority to CN201821292711.0U priority Critical patent/CN208869412U/en
Application granted granted Critical
Publication of CN208869412U publication Critical patent/CN208869412U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses the processing systems of chromate waste water, including conditioning tank, acidification pool, first order reaction pond, second order reaction pond, the neutralization pond, UF membrane pond being sequentially connected by pipeline, activated-charcoal column is provided in the conditioning tank, pass through the organic impurities in Adsorption waste water, the acidification pool is equipped with the first online pH control device for adding sulfuric acid, and the first order reaction pond, second order reaction pond are used for the hexavalent chrome reduction in waste water into trivalent chromium;The neutralization pond is equipped with the second online pH control device for feeding lime, and mud-water separation is realized by the filtration of film in the UF membrane pond.The utility model in conditioning tank by being arranged activated-charcoal column, utilize the hexavalent chromium of the suction-operated removal part of activated-charcoal column, reduce the usage amount of reagent, furthermore hexavalent chromium is sufficiently reduced to by trivalent chromic ion by second-stage reduction, in addition, replace sedimentation basin by UF membrane pond so that outlet effect is highly stable, and be not easily susceptible to variation water quality, medicament reacts the influences of the factors such as bad.

Description

The processing system of chromate waste water
Technical field
The utility model relates to a kind of processing systems of chromate waste water.
Background technique
With the propulsion of process of industrialization, to meet to the anti-corrosion of metal, conduction, the wear-resisting and demands such as beautiful, domestic electricity Industry is plated to flourish, but domestic improvement electroplating wastewater, it is especially serious to the processing capacity for the chromate waste water being more toxic Deficiency, in addition the protective awareness to environment is inadequate, waste electroplating liquor containing chromium penetrates into soil, water flow, causes serious harm to environment; The discharge of a large amount of chromate waste water simultaneously, also results in the waste of chromium resource, causes certain economic loss.
In chrome-plated process, water, the waste of taken out of chromic acid are cleaned, generally plating Cr6+Real utilization rate less than 40%, the loss of oxidized portion only accounts for 1-2% or so, overwhelming majority washing and take away, not only waste huge, treatment process is also A large amount of medicament (reducing agent, alkali, sedimentation agent etc.) is consumed, while generating the problem that a large amount of sludge is also reprocessing.Due to chromium Mainly with Cr6+Form be present in waste water, and have very strong strong oxidizing property, usual reduction method and electrolysis method are to chromate waste water It is handled.Current Cr6+The technique of chromium wastewater treatment is very mature, sewage treatment equipment generally by chemical reaction container, blender, The composition such as chemicals dosing plant, most of enterprise use chemical reduction method by Cr6+It is reduced into Cr3+, pH is then adjusted to weak base Property, make deliquescent Cr3+It is converted into insoluble chromium hydroxide precipitation object, waste water obtains removing purification.Although this method can be with Remove Cr6+, but generate a large amount of Cr3+, and individually need to consume a large amount of reagent using chemical reduction method, and be easy to ring Cause secondary pollution in border.
Utility model content
In order to overcome the problems referred above, the utility model provides a kind of processing system of chromate waste water, and which solve legacy systems Processing cost is high, easily causes the problem of secondary pollution.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of processing system of chromate waste water, Including conditioning tank, acidification pool, first order reaction pond, second order reaction pond, the neutralization pond, UF membrane pond being sequentially connected by pipeline.
Wherein, activated-charcoal column is provided in conditioning tank, one side regulating water quality water is on the other hand useless by Adsorption Organic impurities in water.
Acidification pool is equipped with the first online pH control device for adding sulfuric acid, controls the pH value in acidification pool 2.5 Between~3.0.
First order reaction pond, second order reaction pond are used for the hexavalent chrome reduction in waste water at trivalent chromium, specifically, by acidification pool In waste water be transported in first order reaction pond, reducing agent frerrous chloride is added in first order reaction pond progress level-one reduction, by six Valence chromium ion is reduced to trivalent chromic ion;Then, the waste water after level-one being restored is guided in second order reaction pond, by reducing agent chlorination Ferrous iron, which is added in second order reaction pond, carries out second-stage reduction, and the waste water in frerrous chloride and second order reaction pond generates ferric sulfate, will remain The remaining hexavalent chromium not restored completely is reduced to trivalent chromic ion.
The neutralization pond is equipped with the second online pH control device for feeding lime, and the pH value controlled in neutralization pond exists Between 7~8.
The boosted pump of waste water after neutralization is introduced into UF membrane pond, mud-water separation is realized by the filtration of film, out Water effect stability, and be not easily susceptible to variation water quality, medicament reacts the influences of the factors such as bad.
Further, in order to promote the removal of chromium, agitating device is additionally provided in conditioning tank.
Further, it is additionally provided with flocculation basin between neutralization pond and UF membrane pond, the waste water after neutralization reaction is sent into wadding Solidifying pond, is added high polymer coagulant in flocculation basin, and the dosage of high polymer coagulant stirs sufficiently based on 2~5mg/L, 10~12min is reacted, the waste water stream after flocculation treatment is finally sent into UF membrane pond.
It further, further include the sludge dewatering equipment being connected with UF membrane pond by pipeline.
The utility model compared with prior art, the advantage is that:
The utility model removes part by the way that activated-charcoal column is arranged in conditioning tank, using the suction-operated of activated-charcoal column Hexavalent chromium reduces the usage amount of reagent, furthermore by second-stage reduction hexavalent chromium is sufficiently reduced to trivalent chromium from Son, in addition, replacing sedimentation basin by UF membrane pond, so that outlet effect is highly stable, and it is anti-to be not easily susceptible to variation water quality, medicament Answer the influence of the factors such as bad.The utility model has the advantages that simple and practical in structure, safe and reliable.
Below with reference to drawings and examples, the utility model is described in detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Embodiment,
Referring to Fig. 1, a kind of processing system of chromate waste water comprising the conditioning tank 1 that is sequentially connected by pipeline, acidification Pond 2, first order reaction pond 3, second order reaction pond 4, neutralization pond 5, flocculation basin 6 and UF membrane pond 7.
Wherein, activated-charcoal column 8 is provided in conditioning tank 1, on the other hand one side regulating water quality water passes through Adsorption Organic impurities in waste water.In order to promote the removal of chromium, agitating device 9 is additionally provided in conditioning tank.
Acidification pool 2 is equipped with the first online pH control device 10 for adding sulfuric acid, and the pH value controlled in acidification pool exists Between 2.5~3.0.
First order reaction pond 3, second order reaction pond 4 are used for the hexavalent chrome reduction in waste water into trivalent chromium.Specifically, will acidification Waste water in pond 2 is transported in first order reaction pond 3, and reducing agent frerrous chloride is added to progress level-one reduction in first order reaction pond 3, Hexavalent chromium is reduced to trivalent chromic ion;Then, the waste water after level-one being restored is guided in second order reaction pond 4, will be restored Agent frerrous chloride, which is added in second order reaction pond 4, carries out second-stage reduction, and the waste water in frerrous chloride and second order reaction pond 4 generates sulfuric acid The hexavalent chromium that residue does not restore completely is reduced to trivalent chromic ion by iron.
The neutralization pond 5 is equipped with the second online pH control device 11 for feeding lime, controls the pH in neutralization pond Value is between 7~8.
Waste water after neutralization reaction is sent into flocculation basin 6, high polymer coagulant, flocculating polymer are added in flocculation basin 6 The dosage of agent stirs sufficiently based on 2~5mg/L, reacts 10~12min, is finally sent into the waste water stream after flocculation treatment Mud-water separation is realized by the filtration of film in UF membrane pond 7.
The sludge dewatering equipment 12 being connected by pipeline, sludge dewatering equipment are additionally provided at the sludge discharge hole in UF membrane pond 7 12 are discharged in conditioning tank 1 by pipeline by water is deviate from.
The above is only the preferred embodiment to utility model, is not defined to the range of utility model, therefore Under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to construction described in the utility model, spy The equivalence changes or decoration that sign and principle are made, should all fall into the protection scope of the utility model.

Claims (4)

1. the processing system of chromate waste water, which is characterized in that including the conditioning tank, acidification pool, level-one being sequentially connected by pipeline Reaction tank, second order reaction pond, neutralization pond, UF membrane pond are provided with activated-charcoal column in the conditioning tank, pass through Adsorption waste water In organic impurities, the acidification pool is equipped with the first online pH control device for adding sulfuric acid, the first order reaction Pond, second order reaction pond are used for the hexavalent chrome reduction in waste water into trivalent chromium;The neutralization pond is equipped with for feeding lime Mud-water separation is realized by the filtration of film in second online pH control device, the UF membrane pond.
2. the processing system of chromate waste water as described in claim 1, it is characterised in that: be additionally provided with stirring dress in the conditioning tank It sets.
3. the processing system of chromate waste water as described in claim 1, it is characterised in that: between the neutralization pond and UF membrane pond also Equipped with flocculation basin.
4. the processing system of chromate waste water as described in any one of claims 1 to 3, it is characterised in that: further include and UF membrane pond The sludge dewatering equipment being connected by pipeline.
CN201821292711.0U 2018-08-10 2018-08-10 The processing system of chromate waste water Expired - Fee Related CN208869412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821292711.0U CN208869412U (en) 2018-08-10 2018-08-10 The processing system of chromate waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821292711.0U CN208869412U (en) 2018-08-10 2018-08-10 The processing system of chromate waste water

Publications (1)

Publication Number Publication Date
CN208869412U true CN208869412U (en) 2019-05-17

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CN201821292711.0U Expired - Fee Related CN208869412U (en) 2018-08-10 2018-08-10 The processing system of chromate waste water

Country Status (1)

Country Link
CN (1) CN208869412U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111747565A (en) * 2020-06-30 2020-10-09 武汉钢铁有限公司 Zero-discharge and chromium-recovery method for chromium-containing wastewater in steel industry
CN112624401A (en) * 2020-12-08 2021-04-09 泰州市惠明固废处置有限公司 Chromium-containing waste liquid pretreatment process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111747565A (en) * 2020-06-30 2020-10-09 武汉钢铁有限公司 Zero-discharge and chromium-recovery method for chromium-containing wastewater in steel industry
CN112624401A (en) * 2020-12-08 2021-04-09 泰州市惠明固废处置有限公司 Chromium-containing waste liquid pretreatment process

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190517

Termination date: 20210810

CF01 Termination of patent right due to non-payment of annual fee