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Plasma electroplating sewage treatment method with pypocholoride as excitation target

A sewage treatment method and hypochlorite technology, which are applied in the fields of light water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., which can solve the problems of limited use range and unstable network breaking effect.

Inactive Publication Date: 2018-06-29
江苏沃青环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hypochlorite strong oxidation technology is the most commonly used method for decomposing complexes in electroplating sewage. However, due to the limitation of hypochlorite oxidation ability, its decomposing effect is not stable enough and its application range is limited. Only a few complexes can be oxidized and decomposed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the sodium hypochlorite solution is sprayed into the reaction chamber by means of gas atomization; the amount of NaClO is 20.7‰ of the amount of sewage water; the sodium hypochlorite solution after the atomization is excited by a high-frequency high-voltage electric field of 30KV and 25KHZ to generate plasma; plasma It carries a large number of oxychlorine free radicals, chlorine free radicals, hydroxyl free radicals and high-energy electrons, which has a strong oxidation ability; the sewage is mixed with the above-mentioned oxychlorine free radicals, chlorine free radicals, and hydroxyl free radicals through a rotary jet mixer. and high-energy electrons for full contact reaction; react for 40 minutes to adjust the pH value of the sewage to 11-12, and take the sewage supernatant for nickel ion concentration and COD detection.

[0019] Test results: raw water nickel ion = 134mg / L COD = 4230mg / L

[0020] Effluent Nickel ion=0.02mg / L COD=11mg / L

[0021] It c...

Embodiment 2

[0022] Embodiment 2: The sodium hypochlorite solution is sprayed into the reaction chamber by means of gas atomization; the amount of NaClO is 20.7‰ of the amount of sewage water; the sodium hypochlorite solution after atomization is excited by a high-frequency high-voltage electric field of 35KV and 30KHZ to generate plasma; plasma It carries a large number of oxychlorine free radicals, chlorine free radicals, hydroxyl free radicals and high-energy electrons, which has a strong oxidation ability; the sewage is mixed with the above-mentioned oxychlorine free radicals, chlorine free radicals, and hydroxyl free radicals through a rotary jet mixer. and high-energy electrons to fully contact and react; react for 35 minutes to adjust the pH value of the sewage to 11-12, and take the sewage supernatant for nickel ion concentration and COD detection.

[0023] Test results: raw water nickel ion = 134mg / L COD = 4230mg / L

[0024] Effluent Nickel ion=0mg / L COD=6mg / L

[0025] It can be s...

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PUM

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Abstract

The invention discloses a plasma electroplating sewage treatment method with pypocholoride as an excitation target, belongs to the field of sewage treatment in environment engineering, and mainly aimsto solve the defects that a pypocholoride strong oxidation technique is not stable enough in decomplexing effect and limited in use range in electroplating sewage treatment. To solve the problems, the method comprises the following main steps: spraying a pypocholoride solution in a gas atomization mode; exciting the atomized pypocholoride solution to generate plasma with a high-frequency high-pressure electric field of 30-35KV and 25-30KHZ, wherein the plasma comprises a great amount of oxygen-chlorine free radicals, chlorine free radicals, hydroxyl free radicals and high-energy electrons andhas very good oxidation properties, and within 35-40 minutes, the purpose of degrading heavy metal ion complexes in the electroplating sewage can be achieved; finally removing heavy metal ions in theelectroplating sewage through alkali conditioning precipitation.

Description

technical field [0001] The invention relates to the field of sewage treatment in environmental engineering, in particular to a plasma electroplating sewage treatment method using hypochlorite as an excitation object. Background technique [0002] Electroplating sewage is the rinsing water of plating parts produced in the production process of electroplating enterprises. The sewage contains a large amount of heavy metal ions and various complexes. Due to the existence of complexes, it is difficult to remove heavy metal ions by reducing precipitation. Therefore, it is often necessary to oxidize and decompose the complex by means of a strong oxidant to break the complex, so as to achieve the purpose of reducing the precipitation of heavy metals. [0003] Hypochlorite strong oxidation technology is the most commonly used method for decomposing complexes in electroplating sewage. However, due to the limitation of hypochlorite oxidation ability, its decomposing effect is not stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72C02F1/76C02F101/20C02F103/16
CPCC02F1/30C02F1/72C02F1/76C02F2101/20C02F2103/16C02F2305/023
Inventor 殷衡
Owner 江苏沃青环保科技有限公司