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Electric plating cyanide-containing waste water treatment method

A treatment method, cyanide wastewater technology, applied in metallurgical wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems affecting the factory environment, affecting water quality, water pollution, etc., to reduce pollution and improve chemical reaction efficiency , to ensure the effect of the living environment

Inactive Publication Date: 2018-11-06
ANHUI DEQI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Cyanide cannot be processed by conventional methods such as precipitation, it must be decomposed into CO 2 and N 2 In order to become a non-toxic product, otherwise the wastewater will contain toxic substances, which will affect the water quality
If the wastewater is not treated and discharged directly, it will cause water pollution, or affect the environment around the factory, which will seriously endanger the health of the surrounding people. In view of this, we provide a treatment method for electroplating cyanide-containing wastewater

Method used

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  • Electric plating cyanide-containing waste water treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown, a kind of electroplating cyanide wastewater treatment method comprises the following steps:

[0026] S1. Adjustment of cyanide-containing wastewater: the wastewater collected by the pipe network is discharged into the cyanide-containing wastewater adjustment tank, and then the wastewater is tempered for 1 hour, and after the wastewater is uniformly tempered, enter the next step;

[0027] S2, first-level adjustment: extract the uniform wastewater in S1 into the first-level adjustment tank, then add liquid NaOH to the first-level adjustment tank, and after uniform mixing, the pH value of the solution in the first-level adjustment tank is 10;

[0028] S3, primary cyanide breaking reaction: transport the wastewater in the adjustment tank to the primary cyanide breaking reaction tank through a water pump, then add NaClO into the primary cyanide breaking reaction tank, and stir evenly for 20 minutes with a mixer, wherein the ORP of the waste liquid is ...

Embodiment 2

[0042] Such as figure 1 Shown, a kind of electroplating cyanide wastewater treatment method comprises the following steps:

[0043] S1. Adjustment of cyanide-containing wastewater: the wastewater collected by the pipe network is discharged into the cyanide-containing wastewater adjustment tank, and then the wastewater is tempered for 1.5 hours, and after the wastewater is uniformly tempered, enter the next step;

[0044] S2, first-level adjustment: extract the uniform wastewater in S1 into the first-level adjustment tank, then add liquid NaOH to the first-level adjustment tank, and after uniform mixing, the pH value of the solution in the first-level adjustment tank is 10.5;

[0045] S3, primary cyanide breaking reaction: transport the wastewater in the adjustment tank to the primary cyanide breaking reaction tank through a water pump, then add NaClO into the primary cyanide breaking reaction tank, and stir evenly for 25 minutes with a mixer, wherein the ORP of the waste liqui...

Embodiment 3

[0059] Such as figure 1 Shown, a kind of electroplating cyanide wastewater treatment method comprises the following steps:

[0060] S1. Adjustment of cyanide-containing wastewater: the wastewater collected by the pipe network is discharged into the cyanide-containing wastewater adjustment tank, and then the wastewater is tempered for 2 hours, and after the wastewater is evenly tempered, enter the next step;

[0061] S2, first-level adjustment: extract the uniform wastewater in S1 into the first-level adjustment tank, then add liquid NaOH to the first-level adjustment tank, and after uniform mixing, the pH value of the solution in the first-level adjustment tank is 11;

[0062] S3, primary cyanide breaking reaction: transport the wastewater in the adjustment tank to the primary cyanide breaking reaction tank through the water pump, then add NaClO into the primary cyanide breaking reaction tank, and stir evenly for 30 minutes through the mixer, wherein the ORP of the waste liqui...

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Abstract

The invention discloses an electric plating cyanide-containing waste water treatment method, which comprises the following steps of S1, cyanide-containing waste water regulation; S2, primary regulation; S3, primary cyanide breaking; S4, waste liquid coagulation; S5, waste liquid flocculation; S6, waste liquid precipitation; S7, secondary regulation; S8, secondary cyanide breaking reaction; S9, waste liquid fast mixing; S10, waste liquid reserved reaction; S11, MCR membrane pool reaction; S12, heavy metal waste water reuse in a raw water pool. A primary cyanide breaking reaction pool is used for performing pretreatment on the waste liquid; a secondary cyanide breaking reaction pool is used for performing secondary cyanide breaking treatment on saturated and untreated substances in the wastewater; the waste water cyanide breaking treatment efficiency is improved; an MCR membrane is a membrane reactor and is used for improving the chemical reaction efficiency in the process; meanwhile, the treated waste water can be cyclically utilized; the water resource pollution is further reduced; the goals of energy saving, emission reduction and consumption reduction are realized; the life environment of residents around a factory can be ensured.

Description

technical field [0001] The invention relates to the technical field of electroplating cyanide-containing wastewater treatment, in particular to a treatment method for electroplating cyanide-containing wastewater. Background technique [0002] Cyanide-containing wastewater mainly comes from cyanide electroplating, which is one of the commonly used plating methods and is mainly used in processes such as pre-plating copper and copper alloy plating. According to the formulations of various cyanide plating solutions, the cyanide-containing wastewater generated during the cyanide plating process contains not only highly toxic free cyanide, but also complex ions such as copper cyanide and zinc cyanide, so cyanide-breaking treatment is required . After cyanide is broken, heavy metal ions will also enter the wastewater. Therefore, the treatment of heavy metal ions should also be included in the treatment of cyanide-containing wastewater. [0003] Cyanide cannot be processed by conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/16C02F101/20C02F101/18
CPCC02F1/44C02F1/5236C02F1/56C02F1/66C02F1/76C02F9/00C02F2001/007C02F2101/18C02F2101/20C02F2103/16C02F2301/08
Inventor 林森
Owner ANHUI DEQI ENVIRONMENTAL PROTECTION TECH CO LTD
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