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Staged treatment and resource recycling system for organic chlorine wastewater

A hierarchical treatment and recovery system technology, applied in the direction of water/sewage multi-stage treatment, mechanical oscillation water/sewage treatment, water/sewage treatment, etc., can solve problems such as low recycling rate, prolonged reaction process, and reduced degradation efficiency. Achieve the effect of reducing the concentration of chloride ions, reducing the treatment capacity and increasing the concentration of pollutants

Active Publication Date: 2021-08-20
南通浙源清恒环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the recycling rate of ordinary iron filings is low, which leads to the prolongation of the reaction process, and the frequent replacement of the zero-valent metal iron used in the reaction reduces the degradation efficiency

Method used

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  • Staged treatment and resource recycling system for organic chlorine wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The pretreated organic chlorine wastewater contains 89mg / L of carbon tetrachloride;

[0023] The organic chlorine wastewater is treated by an ultrasonic dechlorination unit, the ultrasonic frequency is 25kHz, and the sound intensity is 35W / cm 2 , the hydraulic retention time is 12min, and the concentration of carbon tetrachloride is reduced to 1.3mg / L; the concentration of organic chlorine compounds after one ultrafiltration concentration is 127.2mg / L, and it enters the iron-carbon dechlorination unit for treatment. After the hydraulic retention time is 23min, the organic chlorine The concentration is reduced to 2.3mg / L, continue to be concentrated by secondary ultrafiltration, and then transported to the oxidation unit for oxidation treatment of organic chlorine wastewater. After treatment by the oxidation unit, the concentration of organic chlorine in the effluent is 0.42mg / L. After subsequent treatment by the flocculation unit and the adsorption unit , dehydrate the ...

Embodiment 2

[0025] The pretreated organic chlorine wastewater contains 89mg / L of carbon tetrachloride;

[0026] The organochlorine wastewater was treated by an ultrasonic dechlorination unit, the ultrasonic device was not turned on, the hydraulic retention time was 12 minutes, and the concentration of carbon tetrachloride was reduced to 4.3mg / L; the concentration of organochlorine compounds after primary ultrafiltration concentration was 143.2mg / L , enter the iron-carbon dechlorination unit for treatment, after the hydraulic retention time is 23 minutes, the concentration of organic chlorine is reduced to 6.3 mg / L, and after continuing to be concentrated by ultrafiltration, it is transported to the oxidation unit for oxidation treatment of organic chlorine wastewater. After the treatment of the oxidation unit, the concentration of organic chlorine in the effluent is 0.98mg / L, after subsequent treatment by the flocculation unit and the adsorption unit, the sediment of the adsorption unit an...

Embodiment 3

[0028] The concentration of organic chlorine in the concentrated medical organic chlorine wastewater after pretreatment (air flotation, oil separation) is 0.63wt%;

[0029] The organic chlorine wastewater is treated by an ultrasonic dechlorination unit, the ultrasonic frequency is 25kHz, and the sound intensity is 35W / cm 2 , the hydraulic retention time is 12min; the concentration of organic chlorine compounds after the first ultrafiltration concentration is 1.72wt%, and it enters the iron-carbon dechlorination unit for treatment. After the hydraulic retention time is 23min, the organic chlorine concentration is reduced to 0.03wt%, and the second ultrafiltration concentration is continued After that, it is sent to the oxidation unit to oxidize the organic chlorine wastewater. After the oxidation unit is treated, the organic chlorine concentration in the effluent is 0.01wt%. After subsequent treatment by the flocculation unit and the adsorption unit, the sediment of the adsorpti...

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Abstract

The invention discloses a staged treatment and resource recycling system for organic chlorine wastewater. The staged treatment and resource recycling system comprises an ultrasonic dechlorination unit, a primary ultrafiltration unit, an iron-carbon dechlorination unit, a secondary ultrafiltration unit, an oxidation unit, a flocculation unit, an adsorption unit and an incineration unit which are sequentially arranged, wherein the adsorption unit is used for discharging water. A concentrated solution obtained through primary ultrafiltration is conveyed to the iron-carbon dechlorination unit, a concentrated solution obtained through secondary ultrafiltration is conveyed to the oxidation unit, permeate obtained through primary ultrafiltration and secondary ultrafiltration is conveyed to the crystallization unit, an ultrasonic generator is arranged in the ultrasonic dechlorination unit, and Cu / Fe / Ag composite metal powder is packed in the ultrasonic dechlorination unit. The mass ratio of Cu to Fe to Ag is (1-5):(25-50):(0.5-1), the ultrasonic frequency is 22-28 kHz, and the sound intensity is 35-45 W / cm<2>; and the oxidation unit is a Fenton unit, an integrally formed Pd / Fe / C filler is arranged in the iron-carbon dechlorination unit, and the mass ratio of Pd to Fe to C is (2-5):(30-50):(20-30). The organic chlorine wastewater is subjected to graded dechlorination and two times of ultrafiltration treatment, so that organic chlorine in the wastewater is efficiently removed, and primary and secondary ultrafiltration permeate liquid is fed into a crystallization unit to obtain recovered salt.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a system for graded treatment and resource recovery of organic chlorine waste water. Background technique [0002] Organochlorine compounds are an important chemical raw material, which are widely used in chemical industry, medicine, pesticide, tanning and other industries. As a result, a large amount of organochlorine wastewater is discharged, and many surface water and groundwater are polluted by organochlorine. Organochlorine compounds are difficult to biodegrade and are very toxic to microorganisms and human health. At present, there are biological methods, physicochemical methods, electrochemical methods, redox incineration methods, etc. to treat organic chlorine wastewater. It is an important way to reduce the toxicity of organochlorine and improve its biochemical or incineration performance. Therefore, how to efficiently reduce the dechlorination of organo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/36
CPCC02F1/001C02F1/24C02F1/28C02F1/283C02F1/286C02F1/288C02F1/36C02F1/40C02F1/444C02F1/46176C02F1/5236C02F1/56C02F1/705C02F1/722C02F1/725C02F9/00C02F2001/46133C02F2101/36C02F2305/026
Inventor 何力波周凯旋
Owner 南通浙源清恒环境科技有限公司
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