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Treatment device and method for chemical nickel plating waste liquid

A technology for waste liquid treatment and electroless nickel plating, which is applied in the fields of chemical instruments and methods, metallurgical wastewater treatment, water/sewage multi-stage treatment, etc. It can solve the problem of limited exchangeable ratio of anion resin, difficulty in stable operation, and low treatment efficiency and other problems, to achieve the effect of reducing secondary pollution, low cost, and low operating intensity

Active Publication Date: 2019-06-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires the use of two kinds of anion and cation exchange resins. When the anion exchange resin is exchanged with the anion ligand of the nickel complex, it will also react with the free anion and be attracted by the metal cation and the ligand in the complex. Influenced by force, the exchangeable ratio of anion resin is very limited; therefore, the treatment efficiency of this method is low, and the resin is easily saturated, making it difficult to operate stably for a long time in industry

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  • Treatment device and method for chemical nickel plating waste liquid

Examples

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Embodiment 1

[0058] An electroless nickel plating waste liquid treatment device, which includes an electrolytic catalytic system, a security filter system, a resin adsorption regeneration system, a multi-stage oxidation degradation system and a deep oxidation precipitation system;

[0059] The electrolytic catalytic system includes an electrolytic cell, a dosing control system and an aeration air duct 123; the aeration air duct 123 is provided with a fan 122; the electrolytic cell includes an electrolytic chamber 108, a cathode 101, an anode 102 and a first sealing cover 107; the dosing control system includes a pH meter automatic controller 103, an ORP automatic controller 104, a liquid caustic dosing pump 109 and a sodium chloride dosing pump 110; the liquid caustic dosing pump 109 extends into the In the electrolysis chamber, the sodium chloride dosing pump 110 extends into the electrolysis chamber through the sodium chloride drug inlet 106;

[0060] The security filter system includes ...

Embodiment 2 and 3

[0065] (1) In the electrolytic catalytic system, under electrolytic conditions, the chlorine ions in the chemical nickel waste liquid are oxidized at the anode to generate chlorine gas, and the pH of the solution is controlled to be weakly acidic to slow down the precipitation of chlorine gas, and the dissolved chlorine gas oxidizes phosphite into phosphate At the same time, nickel ions are reduced at the cathode to obtain simple nickel; the chlorine gas produced is injected into the deep oxidation precipitation system through the fan and aeration duct; the solution after electrolysis flows into the security filtration system;

[0066](2) The solution after electrolysis is filtered by cotton core and carbon fiber in the security filtration system in turn, and then under the condition of opening the first valve and closing the second valve, the solution enters the cyclone resin adsorption column for absorption and treatment, and then passes through the third lift pump Enter the ...

Embodiment 2

[0070] Take 10L of chemical nickel waste solution and add it to the electrolytic cell, wherein Ni 2+ Concentration 4.8g / L, NaH 2 PO 4 The concentration is 18.4g / L; initially add 20g of sodium chloride solid into the electrolytic cell; set the DC voltage to 4V; set the pH range to 5-6; set the ORP range to 150-400mV, when the ORP is lower than 400mV, add For sodium chloride solution with a mass concentration of 30%, stop adding sodium chloride after adding 20ml of sodium chloride each time through the quantitative pump control, and monitor the cycle for 5 minutes. If the ORP meter shows higher than 400mV after 5 minutes, stop adding, such as ORP after 5 minutes. When the instrument shows that it is lower than 400mV, continue to add 20ml of sodium chloride to ensure that the potential remains at 150-400mV.

[0071] After electrolysis for 3 hours, sample analysis was carried out. When the nickel ion concentration was 40mg / L, it was pumped into the adsorption column containing 3...

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Abstract

Belonging to the technical field of chemical nickel plating wastewater treatment, the invention discloses a treatment device and method for chemical nickel plating waste liquid. Specifically, a pH automatic controller and an ORP automatic controller are utilized for automatic adding of alkali and sodium chloride, electrocatalytic oxidation is employed to break complexing so as to dissociate and precipitate nickel ions at an negative electrode; then resin adsorption is utilized for deep nickel removal to as to make the nickel ion below the emission standard; adding a Fenton reagent into the nickel removed solution for further oxidization of phosphate radical into phosphate radicals easy to precipitate, and under the action of a calcium salt and a flocculant, the product is converted into calcium phosphate precipitate so as to realize up-to-standard emission of nickel and phosphorus. According to the invention, the catalyst is added in electrolysis to produce electrocatalytic oxidation so as to realize the dual effects of oxidation degradation and nickel deposition, thereby not only reducing the terminal oxidant consumption, but also realizing the effect of complexation breaking on anickel-containing complex and increasing the nickel removal effect; a backwashing regeneration auxiliary apparatus is set for resin adsorption; and low recovery of nickel metal and phosphorus-containing fertilizer is carried out respectively at the negative electrode and precipitation tank so as to realize green treatment. Therefore, the device and method have very high economic and environmentalprotection value.

Description

technical field [0001] The invention belongs to the technical field of chemical nickel plating waste water treatment, and in particular relates to a treatment device and method for chemical nickel plating waste liquid. Background technique [0002] In the PCB and electroplating industry, in order to increase the solderability of the plated parts, the bonding force of the coating, and the appearance of the color, it is often necessary to use a surface treatment process, generally using inert precious metals such as gold plating, silver, and palladium, which have strong oxidation resistance and solderability. Good features, but this kind of metal is expensive, and the coating is generally thin. It is often necessary to plate a layer of nickel between the precious metal and the base material, which can not only reduce the cost, but also improve the compatibility between the precious metal and the base material. The electroless nickel plating process is the main method. At prese...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/16C02F101/10C02F101/20
Inventor 周秋曼陈海娇宋文杰范红潘湛昌
Owner GUANGDONG UNIV OF TECH
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