Treatment method and apparatus of electroplating wastewater

A technology of electroplating wastewater and treatment methods, which is applied in the direction of metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of high cost and complicated process of electroplating wastewater treatment, and achieve low cost of treatment equipment and simple process flow Effect

Inactive Publication Date: 2018-06-19
SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of this application is to provide a water treatment technology to sol...

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  • Treatment method and apparatus of electroplating wastewater

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Embodiment 1

[0034] A treatment method for electroplating wastewater, the method comprises the following steps in sequence:

[0035] (1) Remove the suspension and slick oil in the raw water by air flotation, and then adjust the pH of the treated electroplating wastewater to 3-4.

[0036] (2) Adding Fenton's reagent to the electroplating wastewater, a first-order Fenton reaction occurs, and the pH is adjusted to 8-9; specifically, the time for the first-order Fenton reaction is 1 hour.

[0037] (3) After the electroplating wastewater treated in step (2) is precipitated, the pH of the supernatant is adjusted to 4-6.

[0038] (4) Add Fenton's reagent to the supernatant obtained in step (3), a secondary Fenton reaction occurs, and the pH is adjusted to 9-10; specifically, the time of the secondary Fenton reaction is 45min-1.5h; preferably Yes, after adjusting the pH to 9-10, add bleach water to the electroplating wastewater, a cyanide breaking reaction occurs to remove cyanide, and then remov...

Embodiment 2

[0044] Such as figure 1 As shown, the application provides a treatment device for electroplating wastewater, comprising a comprehensive pool 1, an air flotation machine 2, a primary reaction pool 3, a primary sedimentation pool 4, a secondary reaction pool 5, and a secondary sedimentation pool arranged in sequence 6. Reduction reaction pool 7, pH callback pool 8, tertiary sedimentation pool 9 and biochemical pool 10.

[0045] Specifically, a cyanide breaking tank is also provided between the secondary reaction tank 5 and the secondary sedimentation tank 6 . Lift pumps are installed between the comprehensive tank 1 and the air flotation machine 2, between the primary reaction tank 3 and the primary sedimentation tank 4, and between the secondary reaction tank 5 and the secondary sedimentation tank 6. Among them, the primary sedimentation tank 4, the secondary sedimentation tank 6 and the tertiary sedimentation tank 9 are inclined plate sedimentation tanks.

[0046] Among them...

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Abstract

The invention discloses a treatment method of electroplating wastewater. The method successively comprises the following steps: removing suspension liquid and floating oil in raw water by virtue of anair floating method, and regulating the PH to 3 to 4; adding a fenton reagent, performing primary fenton reaction, and regulating the PH to 8 to 9; precipitating, and regulating the PH of supernatantto 4 to 6; performing secondary fenton reaction, and regulating the PH to 9 to 10; precipitating, and regulating the PH of the supernatant to 2 to 4; performing reduction reaction, and removing hexavalent chromium ions; regulating the PH to 8 to 9, precipitating, and introducing the supernatant to a biochemical tank to be treated; and discharging the water treated in the biochemical tank up to standard. The electroplating wastewater treatment process provided by the invention is simple in process, rapid for workers to operate and low in treatment apparatus cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for electroplating wastewater. Background technique [0002] Electroplating technology is a basic process widely used in industry, involving many industries such as electromechanical, instrumentation, electronic communication, automobile, shipbuilding, light industry, aerospace, etc. It is mainly used for product decoration, protection, performance improvement or optimization, prolonging life, increasing The added value of commodities has unique application value and is an indispensable craft industry in the national economy. In the electroplating production process, a large amount of chemicals and various metal substances are often used, and a large amount of energy and water resources are consumed at the same time, and the utilization rate of resources is low. Therefore, in the production process of the electroplating industry, a large amo...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/12C02F101/18C02F101/22C02F103/16
CPCC02F1/24C02F1/66C02F1/70C02F1/725C02F3/28C02F9/00C02F11/122C02F2001/007C02F2101/18C02F2101/22C02F2103/16C02F2301/08
Inventor 郭聪
Owner SHENZHEN LVQIN ENVIRONMENTAL PROTECTION TECH CO LTD
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