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Electroplating wastewater treatment process

A technology for treating process and electroplating wastewater, which is applied in metallurgical wastewater treatment, water/sewage treatment, special compound water treatment, etc. It can solve the problems of low impurity removal efficiency and cumbersome procedures, and achieve good flocculation, simple operation procedures, The effect of improving the processing effect

Active Publication Date: 2020-11-13
乐清市荣禹污水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the defects of cumbersome treatment process and low impurity removal efficiency of cyanide-containing electrochrome plating wastewater, this application provides a treatment process for electroplating wastewater

Method used

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  • Electroplating wastewater treatment process
  • Electroplating wastewater treatment process

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Embodiment 1

[0038] A treatment process for electroplating wastewater, specifically comprising the following treatment steps:

[0039] S1. Pre-treat the cyanide-containing electrochrome plating wastewater, and sequentially feed the wastewater into the degreasing tank and filter tank to remove the slick oil and impurities in the wastewater;

[0040] S2. Feed the wastewater into the regulating tank, and add dilute H into the regulating tank through the dosing system2 SO 4 The solution adjusts the pH value of the wastewater to 3;

[0041] S3. Feed the wastewater into the Fenton reaction tank, and add FeSO to the Fenton reaction tank through the dosing system 4 , after reacting for 15min, add 25% H 2 o 2 solution, H 2 o 2 with Fe 2+ The molar ratio is 8:1, and the residence time of the wastewater in the Fenton reaction tank is 50min;

[0042] S4. Feed the waste water into the flocculation tank 1, add polyphosphorus ferric chloride into the flocculation tank 1 through the dosing system, ...

Embodiment 2

[0051] A treatment process for electroplating wastewater, specifically comprising the following treatment steps:

[0052] S1. Pre-treat the cyanide-containing electrochrome plating wastewater, and sequentially feed the wastewater into the degreasing tank and filter tank to remove the slick oil and impurities in the wastewater;

[0053] S2. Feed the wastewater into the regulating tank, and add dilute H into the regulating tank through the dosing system 2 SO 4 The solution adjusts the pH value of the wastewater to 2;

[0054] S3. Feed the wastewater into the Fenton reaction tank, and add FeSO to the Fenton reaction tank through the dosing system 4 , after reacting for 15min, add 25% H 2 o 2 solution, H 2 o 2 with Fe 2+ The molar ratio is 6:1, and the residence time of the wastewater in the Fenton reaction tank is 40min;

[0055] S4. Feed the waste water into the flocculation tank 1, add polyphosphorus ferric chloride into the flocculation tank 1 through the dosing system...

Embodiment 3

[0064] A treatment process for electroplating wastewater, specifically comprising the following treatment steps:

[0065] S1. Pre-treat the cyanide-containing electrochrome plating wastewater, and sequentially feed the wastewater into the degreasing tank and filter tank to remove the slick oil and impurities in the wastewater;

[0066] S2. Feed the wastewater into the regulating tank, and add dilute H into the regulating tank through the dosing system 2 SO 4 The solution adjusts the pH value of the wastewater to 3.5;

[0067] S3. Feed the wastewater into the Fenton reaction tank, and add FeSO to the Fenton reaction tank through the dosing system 4 , after reacting for 15min, add 25% H 2 o 2 solution, H 2 o 2 with Fe 2+ The mol ratio is 10:1, and the residence time of waste water in the Fenton reaction tank is 60min;

[0068] S4. Feed the waste water into the flocculation tank 1, add polyphosphorus ferric chloride into the flocculation tank 1 through the dosing system, ...

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Abstract

The invention relates to an electroplating wastewater treatment process. The electroplating wastewater treatment process specifically comprises the following steps: S1, pretreating cyanide-containingchromium electroplating wastewater; S2, feeding the wastewater into an adjusting tank, and adjusting the pH value of the wastewater; S3, feeding the wastewater into a Fenton reaction tank, adding FeSO4 into the Fenton reaction tank, reacting for 15 minutes, adding a H2O2 solution with the concentration of 25%, and carrying out oxidative decomposition reaction; S4, feeding the wastewater into a flocculation tank I, and carrying out first flocculation treatment on the wastewater; S5, feeding the wastewater into a reduction tank, and adding a reducing agent into the reduction tank through a dosing system to react for 50-70 minutes; S6, feeding the wastewater into a flocculation tank II, and carrying out secondary flocculation treatment on the wastewater; and S7, feeding the wastewater into asedimentation tank, and standing to remove sediments; and S8, filtering the supernatant, and directly discharging the filtrate after the filtrate is detected to reach the standard. The electroplatingwastewater treatment process has the effect of overcoming the defects that the cyanide-containing chromium electroplating wastewater treatment process is tedious and the impurity removal efficiency isnot high.

Description

technical field [0001] The present application relates to the technical field of wastewater treatment, in particular to an electroplating wastewater treatment process. Background technique [0002] Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts. The electroplating film has the function of preventing metal oxidation, and can also improve the properties of metal such as wear resistance, conductivity, reflection, and corrosion resistance. Electroplating wastewater will be produced during the electroplating process. The sources of electroplating wastewater are generally: 1. Plating parts cleaning water; As well as various bath liquids and drains of "running, popping, dripping, and leaking" caused by leakage or improper operation and management of the plating ta...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/18C02F101/22C02F103/16
CPCC02F9/00C02F1/001C02F1/66C02F1/722C02F1/725C02F1/705C02F1/5245C02F1/56C02F2101/22C02F2101/18C02F2305/026C02F2103/16
Inventor 白少伟胡拓潘俊鹏
Owner 乐清市荣禹污水处理有限公司
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