CN109721187A - A kind of chemical nickel plating waste solution processing method - Google Patents

A kind of chemical nickel plating waste solution processing method Download PDF

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Publication number
CN109721187A
CN109721187A CN201910022464.5A CN201910022464A CN109721187A CN 109721187 A CN109721187 A CN 109721187A CN 201910022464 A CN201910022464 A CN 201910022464A CN 109721187 A CN109721187 A CN 109721187A
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China
Prior art keywords
nickel plating
waste solution
chemical nickel
plating waste
supernatant
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Chinese (zh)
Inventor
杨洋
席丽丽
刘继成
孙亚辉
年夫久
徐冬
陈志超
石勇
黄建阳
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SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Priority to CN201910022464.5A priority Critical patent/CN109721187A/en
Publication of CN109721187A publication Critical patent/CN109721187A/en
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Abstract

The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps: step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach wastewater discharge standard after dephosphorization.

Description

A kind of chemical nickel plating waste solution processing method
Technical field
The invention belongs to liquid waste disposal technique fields, and in particular to a kind of chemical nickel plating waste solution processing method.
Background technique
Chemical plating nickel technology is compared with conventional plating techniques, and thickness of coating is uniformly and without providing power supply, even if plating piece It is non-conductive to carry out nickel plating while also there is magnetism etc., nowadays led in petrochemical industry, machine-building and space flight and aviation etc. Domain is using very extensive.In chemical nickel-plating liquid other than there are the nickel sources such as nickel sulfate, nickel chloride, also contain a large amount of hypophosphites network The organic additive of mixture, organic acid complexing agent and other different function, thus chemical nickel plating waste solution generally have it is higher COD, and nickel also exists in the form of complex compound, and the recycling of decontamination processing and nickel is very difficult.Such chemical nickel plating is useless The waste water treatment system that liquid is directly discharged into plating industrial district will cause greater impact to it, and the processing for improving comprehensive wastewater is difficult Degree.
Currently, the treatment process for chemical nickel plating waste solution is broadly divided into the precipitation method, oxidation-reduction method etc..The precipitation method be After aoxidizing contact break, by the way that energy and Ni is added2+The nickel ion in waste liquid is removed in conjunction with the reagent for generating precipitating, it is common to precipitate Agent has NaOH, calcium oxide etc..Although the method can sufficiently remove the nickel ion in waste liquid, its sludge quantity is larger, and Nickel resources can not be realized and directly be recycled, resulted in waste of resources and bring additional solid waste.Oxidation-reduction method is to aoxidize After contact break, nickel, the removal of Lai Shixian nickel are reduced nickel ions to by the way that reducing agent is added.It is useless in order to reduce chemical nickel plating simultaneously Pollutant load recycles nickel ion again in liquid, and treatment process needs to be firstly added oxidant contact break, that is, need orthophosphite and Hypophosphorous acid root is oxidizing to orthophosphoric acid root, and organic matter and reducing agent form competition pass when encountering oxidant with complexing agent in waste liquid System, it is therefore desirable to sufficient oxidant be provided and come simultaneous oxidation organic matter and contact break.Currently used efficient oxidation technique has Fenton oxidation method, Ozonation etc., but its to the contact break efficiency of chemical nickle-plating wastewater all 70% hereinafter, and Fenton oxidation method also needs to consume a large amount of iron filings and acid-base reagent, increases the sludge quantity of waste water, and increases the harm of sludge Property, therefore be badly in need of developing a kind of efficient and environment-friendly chemical nickel plating waste solution processing method.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of chemical nickel plating waste solution processing method is provided, Overcome in the prior art 1: it is larger using precipitation method sludge quantity, and can not nickel resources be realized with directly recycling, it cause resource Waste and bring additional solid waste, 2:Fenton oxidizing process, Ozonation to the contact break efficiency of chemical nickle-plating wastewater all 70% hereinafter, and need to provide sufficient oxidant and come simultaneous oxidation organic matter and contact break, 3:Fenton oxidizing process also needs The problems such as consuming a large amount of iron filings and acid-base reagent, increasing the sludge quantity of waste water, and increase the harmfulness of sludge.
In order to solve technical problem, the technical scheme is that a kind of chemical nickel plating waste solution processing method, including it is following Step:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into filter press, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Preferably, the step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, Press dry base sludge.
Preferably, the step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, and it is molten to be subsequently added into alkalinity PH value is adjusted to 11 ~ 13 by liquid.
Preferably, the alkaline solution can be NaOH solution, Ca (OH)2One of solution or both mixture.
Preferably, the step 6) is will to complete precipitating except the supernatant of nickel is discharged into dephosphorization pond, be subsequently added into calcium oxide into Row dephosphorization, COD < 45mg/L in the supernatant that chemical nickel plating waste solution completes dephosphorization, total nickel content < 0.15ppm, total phosphorus content < 0.5mg/L, that is, reach wastewater discharge standard.
Compared with the existing technology, the present invention has the advantages that
(1) chemical nickel plating waste solution processing method of the present invention takes full advantage of ferrate using novel ferrate as oxidant Strong oxidizing property in acid condition, the Fe (OH) 3 obtained after there is extremely strong oxidation contact break effect, ferrate to decompose have The ingredient of good flocculating function, assists in removing the greasy dirt in waste water, ferrate can also significantly remove chemical plating in addition to contact break Greasy dirt and COD in nickel waste liquid will not introduce new impurity again simultaneously, and the additive amount of ferrate is lower, adding method side Just quick;
(2) chemical nickel plating waste solution processing method of the present invention is high-efficient, environmental benefit is good, is suitble to large-scale industrial production, this hair The bright processing and recovery process individually taken for chemical nickel plating waste solution more efficiently, economic, can both mitigate the economy of enterprise Burden and environmental protection pressure, also can produce additional economic benefit;
(3) chemical nickel plating waste solution processing method contact break of the present invention is high-efficient, sludge quantity is few, cost is relatively low, environmental-friendly, after processing Waste liquid can reach wastewater discharge standard.
Specific embodiment
The specific embodiment of the invention is described below with reference to embodiment:
It should be noted that structure, ratio, the size etc. of this specification signal, only to cooperate specification revealed interior Hold, so that those skilled in the art understands and reads, is not intended to limit the invention enforceable qualifications, any structure Modification, the change of proportionate relationship or the adjustment of size, do not influencing the effect of present invention can be generated and the mesh that can reach Under, it should all still fall in the range of disclosed technology contents can cover.
Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
PH conditioning tank of the present invention is used to adjust the PH of chemical nickel plating waste solution, and oxidation pond is for carrying out brokenly nickel complex Network and removal COD, the Fe (OH) that wherein ferrate generates after decomposing3Generating flocculating effect makes the particles such as greasy dirt biggish miscellaneous Matter, which is adhered to each other, sinks to bottom of pond, and for sedimentation basin for precipitating dephosphorization, dephosphorization pond is used for dephosphorization, wherein PH conditioning tank, oxidation pond, heavy Shallow lake pond and dephosphorization pond are existing equipment.
Compressor of the present invention, pump are the prior art.
The COD(Chemical Oxygen Demand) it is COD, it is chemically to measure to need in water sample The amount for the reducing substances to be oxidized in waste water, wastewater treatment plant effluent and contaminated water, can be aoxidized by strong oxidizer The oxygen equivalent of substance (generally organic matter), in the operation of river pollution and industrial wastewater Quality Research and waste water treatment plant In management, it is an organic pollution parameter that is important and can comparatively fast measuring, is often indicated with symbol COD.
Embodiment 1
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Embodiment 2
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Embodiment 3
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Embodiment 4
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Embodiment 5
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Embodiment 6
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Embodiment 7
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Preferably, the step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, Press dry base sludge.
Embodiment 8
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Preferably, the step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, Press dry base sludge.
Preferably, the step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, and it is molten to be subsequently added into alkalinity PH value is adjusted to 11 ~ 13 by liquid.
Embodiment 9
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carries out oxidizing, flocculating.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Preferably, the step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, Press dry base sludge.
Preferably, the step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, and it is molten to be subsequently added into alkalinity PH value is adjusted to 11 ~ 13 by liquid.
Preferably, the alkaline solution can be NaOH solution, Ca (OH)2One of solution or both mixture.
Preferably, the additional amount of the calcium oxide does not re-form for waste liquid and is precipitated as stopping.
Embodiment 10
The invention discloses a kind of chemical nickel plating waste solution processing methods, comprising the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
Preferably, the PH for chemical nickel plating waste solution being adjusted in the step 1) is that chemical nickel plating waste solution is discharged into PH conditioning tank, It is subsequently added into dilute sulfuric acid and the pH value of chemical nickel plating waste solution is adjusted to 4 ~ 6, wherein the concentration of dilute sulfuric acid is 4mol/L.
Preferably, the step 2 be by step 1) adjust complete PH chemical nickel plating waste solution be discharged into oxidation pond, then plus Enter ferrate and carry out oxidizing, flocculating, the ferrate sufficiently can carry out contact break to nickel complex and remove COD, and ferric acid The Fe (OH) that salt generates after decomposing3Flocculating effect is generated the biggish impurity of the particles such as greasy dirt to be adhered to each other sink to bottom of pond.
Preferably, the ferrate is one of Na2Fe04, potassium ferrate and barium ferrate or a variety of.
Preferably, the additional amount of the ferrate is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
Preferably, the step 3) is that the sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor, The supernatant for completing the chemical nickel plating waste solution of oxidizing, flocculating is discharged into sedimentation basin.
Preferably, the step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, Press dry base sludge.
Preferably, the step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, and it is molten to be subsequently added into alkalinity PH value is adjusted to 11 ~ 13 by liquid.
Preferably, the alkaline solution can be NaOH solution, Ca (OH)2One of solution or both mixture.
Preferably, the step 6) is will to complete precipitating except the supernatant of nickel is discharged into dephosphorization pond, be subsequently added into calcium oxide into Row dephosphorization, COD < 45mg/L in the supernatant that chemical nickel plating waste solution completes dephosphorization, total nickel content < 0.15ppm, total phosphorus content < 0.5mg/L, that is, reach wastewater discharge standard.
Embodiment 11
1000L chemical nickel plating waste solution is discharged into PH conditioning tank by step 1), is subsequently added into 4mol/L dilute sulfuric acid for chemical nickel plating waste solution PH value be adjusted to 4;
The chemical nickel plating waste solution that step 1) adjusts completion PH is discharged into oxidation pond by step 2, is subsequently added into Na2Fe04 and is aoxidized Flocculation, the additional amount of Na2Fe04 are 100g, and wherein the oxidizing, flocculating processing time is 20 ~ 30min;
The sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor by step 2 by step 3), will complete to aoxidize The supernatant of flocculated chemical nickel plating waste solution is discharged into sedimentation basin;
Step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, presses base sludge It is dry;
Step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, is subsequently added into Ca (OH)2Solution adjusts pH value It is 11;
Step 6) is that step 5) is completed to precipitating except the supernatant of nickel is discharged into dephosphorization pond, is subsequently added into calcium oxide and carries out dephosphorization, removes Supernatant can reach wastewater discharge standard after phosphorus.
Embodiment 12
1000L chemical nickel plating waste solution is discharged into PH conditioning tank by step 1), is subsequently added into 4mol/L dilute sulfuric acid for chemical nickel plating waste solution PH value be adjusted to 6;
The chemical nickel plating waste solution that step 1) adjusts completion PH is discharged into oxidation pond by step 2, is subsequently added into potassium ferrate and is aoxidized Flocculation, the additional amount of potassium ferrate are 1000g, and wherein the oxidizing, flocculating processing time is 20 ~ 30min;
The sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor by step 2 by step 3), will complete to aoxidize The supernatant of flocculated chemical nickel plating waste solution is discharged into sedimentation basin;
Step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, presses base sludge It is dry;
Step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, is subsequently added into NaOH solution, pH value is adjusted to 13;
Step 6) is that step 5) is completed to precipitating except the supernatant of nickel is discharged into dephosphorization pond, is subsequently added into calcium oxide and carries out dephosphorization, removes Supernatant can reach wastewater discharge standard after phosphorus.
Embodiment 13
1000L chemical nickel plating waste solution is discharged into PH conditioning tank by step 1), is subsequently added into 4mol/L dilute sulfuric acid for chemical nickel plating waste solution PH value be adjusted to 5;
The chemical nickel plating waste solution that step 1) adjusts completion PH is discharged into oxidation pond by step 2, is subsequently added into barium ferrate and is aoxidized Flocculation, the additional amount of barium ferrate are 500g, and wherein the oxidizing, flocculating processing time is 20 ~ 30min;
The sludge for the chemical nickel plating waste solution bottom for completing oxidizing, flocculating is pumped into compressor by step 2 by step 3), will complete to aoxidize The supernatant of flocculated chemical nickel plating waste solution is discharged into sedimentation basin;
Step 4) is that the base sludge for being separated by solid-liquid separation step 3) carries out compression processing by filter press, presses base sludge It is dry;
Step 5) is that the supernatant for being separated by solid-liquid separation step 3) is discharged into sedimentation basin, is subsequently added into NaOH solution, pH value is adjusted to 12;
Step 6) is that step 5) is completed to precipitating except the supernatant of nickel is discharged into dephosphorization pond, is subsequently added into calcium oxide and carries out dephosphorization, removes Supernatant can reach wastewater discharge standard after phosphorus.
Embodiment 14
Control experiment 1 is handled 1000L chemical nickel plating waste solution using the precipitation method, and precipitating reagent NaOH 10kg is added.
Embodiment 15
Control experiment 2 is handled 1000L chemical nickel plating waste solution using Fenton oxidation method, and oxidant 5kg, precipitating is added Agent 5kg.
The supernatant completed by detection chemical nickel plating waste solution processing, judges whether it meets the discharge standard of waste water, examines COD, total nickel content and total phosphorus content are surveyed, specific parameter of discharging is shown in Table 1:
1 embodiment of table, 11 ~ 15 chemical nickel plating waste solution treated discharge parameter
As it can be seen from table 1 reach wastewater discharge standard after the chemical nickel plating waste solution processing of embodiment 11 ~ 13, oxidant Dosage is smaller, and the sludge quantity of generation is also smaller, and the precipitating reagent dosage that embodiment 14 is added is larger, and the sludge quantity of generation is also larger, The dosage of oxidant and precipitating reagent that embodiment 15 is added is larger, and the sludge quantity of generation is also larger, therefore the application contact break efficiency Height, sludge quantity is few, cost is relatively low, environmental-friendly, and treated, and waste liquid can reach wastewater discharge standard.
It is only precipitated in the prior art by precipitating reagent, the phosphorous (PO in chemical nickel plating waste solution3 -1) and time phosphorus (PO2 +1) Be easy to precipitating reagent to be complexed, can not Precipitation, the present invention is using the strong oxidizing property of ferrate by phosphorous (PO3) and time phosphorus (PO2) it is oxidized to positive phosphorus (PO4 -3), precipitating can be just formed after precipitating reagent is added, so that chemical nickel plating waste solution is met discharge and wants It asks.
Chemical nickel plating waste solution processing method of the present invention takes full advantage of ferrate using novel ferrate as oxidant Strong oxidizing property in acid condition, the Fe (OH) obtained after there is extremely strong oxidation contact break effect, ferrate to decompose3Have The ingredient of good flocculating function, assists in removing the greasy dirt in waste water, ferrate can also significantly remove chemical plating in addition to contact break Greasy dirt and COD in nickel waste liquid will not introduce new impurity again simultaneously, and the additive amount of ferrate is lower, adding method side Just quick.
Chemical nickel plating waste solution processing method of the present invention is high-efficient, environmental benefit is good, is suitble to large-scale industrial production, this hair The bright processing and recovery process individually taken for chemical nickel plating waste solution more efficiently, economic, can both mitigate the economy of enterprise Burden and environmental protection pressure, also can produce additional economic benefit.
The preferred embodiment for the present invention is explained in detail above, but the present invention is not limited to the above embodiments, Those of ordinary skill in the art within the scope of knowledge, can also make various without departing from the purpose of the present invention Variation.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not It is limited to specific embodiment, the scope of the present invention is defined by the following claims.

Claims (10)

1. a kind of chemical nickel plating waste solution processing method, which comprises the following steps:
Step 1) adjusts the PH of chemical nickel plating waste solution, makes chemical nickel plating waste solution in acidity;
Step 1) is adjusted the chemical nickel plating waste solution progress oxidizing, flocculating for completing PH by step 2;
The chemical nickel plating waste solution that step 2 completes oxidizing, flocculating is separated by solid-liquid separation by step 3);
Step 4) carries out compression processing to the base sludge that step 3) is separated by solid-liquid separation;
Step 5) is added alkaline solution to the supernatant that step 3) is separated by solid-liquid separation and carries out precipitating except nickel;
Step 6) completes precipitating to step 5) and carries out dephosphorization except calcium oxide is added in the supernatant of nickel, and supernatant can reach after dephosphorization Wastewater discharge standard.
2. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: adjusted in the step 1) The PH of chemical nickel plating waste solution is that chemical nickel plating waste solution is discharged into PH conditioning tank, is subsequently added into PH of the dilute sulfuric acid by chemical nickel plating waste solution Value is adjusted to 4 ~ 6, and wherein the concentration of dilute sulfuric acid is 4mol/L.
3. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: the step 2 is will to walk The rapid chemical nickel plating waste solution for 1) adjusting completion PH is discharged into oxidation pond, is subsequently added into ferrate and carries out oxidizing, flocculating.
4. a kind of chemical nickel plating waste solution processing method according to claim 3, it is characterised in that: the ferrate is height One of sodium ferrite, potassium ferrate and barium ferrate are a variety of.
5. a kind of chemical nickel plating waste solution processing method according to claim 3, it is characterised in that: the ferrate adds Entering amount is 0.1 ~ 1g/L, and wherein the oxidizing, flocculating processing time is 20 ~ 30min.
6. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: the step 3) is will be complete It is pumped into filter press at the sludge of the chemical nickel plating waste solution bottom of oxidizing, flocculating, the upper of the chemical nickel plating waste solution of oxidizing, flocculating will be completed Clear liquid is discharged into sedimentation basin.
7. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: the step 4) is will to walk The rapid base sludge 3) being separated by solid-liquid separation carries out compression processing by filter press, press dry base sludge.
8. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: the step 5) is will to walk The rapid supernatant 3) being separated by solid-liquid separation is discharged into sedimentation basin, is subsequently added into alkaline solution, pH value is adjusted to 11 ~ 13.
9. a kind of chemical nickel plating waste solution processing method according to claim 8, it is characterised in that: the alkaline solution can be with For NaOH solution, Ca (OH)2One of solution or both mixture.
10. a kind of chemical nickel plating waste solution processing method according to claim 1, it is characterised in that: the step 6) be by Precipitating is completed except the supernatant of nickel is discharged into dephosphorization pond, calcium oxide is subsequently added into and carries out dephosphorization, when chemical nickel plating waste solution completes dephosphorization Supernatant in COD < 45mg/L, total nickel content < 0.15ppm, total phosphorus content < 0.5mg/L reaches wastewater discharge standard.
CN201910022464.5A 2019-01-10 2019-01-10 A kind of chemical nickel plating waste solution processing method Pending CN109721187A (en)

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CN111072179A (en) * 2019-12-27 2020-04-28 江苏中科瑞尔汽车科技有限公司 Chemical nickel plating waste water treatment method
CN111573883A (en) * 2020-04-21 2020-08-25 生态环境部华南环境科学研究所 Method for treating chemical nickel plating waste liquid through iron-based catalyst
CN111995102A (en) * 2019-10-22 2020-11-27 沈阳化工研究院设计工程有限公司 Treatment method of electroplating wastewater containing complex nickel
CN112759115A (en) * 2020-12-17 2021-05-07 南京师范大学 Method and device for treating chemical nickel plating waste bath solution
CN112875825A (en) * 2021-01-25 2021-06-01 南昌航空大学 Method for treating chemical nickel plating wastewater containing high concentration straight-chain carboxylic acid as organic ligand by using ferrate

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CN103833123A (en) * 2014-02-21 2014-06-04 陈瀚翔 Method for treating complexed chemical nickel electroplating wastewater
US20160159669A1 (en) * 2014-12-04 2016-06-09 Exxonmobil Research And Engineering Company Removal of metals from wastewater
CN106698743A (en) * 2016-11-25 2017-05-24 南宁市黑晶信息技术有限公司 Nickel ion wastewater treatment method

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CN111995102A (en) * 2019-10-22 2020-11-27 沈阳化工研究院设计工程有限公司 Treatment method of electroplating wastewater containing complex nickel
CN111072179A (en) * 2019-12-27 2020-04-28 江苏中科瑞尔汽车科技有限公司 Chemical nickel plating waste water treatment method
CN111573883A (en) * 2020-04-21 2020-08-25 生态环境部华南环境科学研究所 Method for treating chemical nickel plating waste liquid through iron-based catalyst
CN111573883B (en) * 2020-04-21 2022-09-13 生态环境部华南环境科学研究所 Method for treating chemical nickel plating waste liquid through iron-based catalyst
CN112759115A (en) * 2020-12-17 2021-05-07 南京师范大学 Method and device for treating chemical nickel plating waste bath solution
CN112875825A (en) * 2021-01-25 2021-06-01 南昌航空大学 Method for treating chemical nickel plating wastewater containing high concentration straight-chain carboxylic acid as organic ligand by using ferrate

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