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Method and device for degrading pollutants through ultraviolet catalytic wet oxidation

A technology for catalyzing wet oxidation and pollutants. It is used in oxidized water/sewage treatment, light water/sewage treatment, etc. It can solve problems such as harsh degradation conditions, and achieve the effects of complete degradation, saving investment and improving utilization.

Inactive Publication Date: 2010-10-20
李朝林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of harsh degradation conditions of traditional catalytic wet oxidation technology, a UV-Catalytic Wet Oxidation Process (UV-Catalytic Wet Oxidation Process, referred to as UV-CWOP) was proposed.

Method used

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  • Method and device for degrading pollutants through ultraviolet catalytic wet oxidation
  • Method and device for degrading pollutants through ultraviolet catalytic wet oxidation

Examples

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Effect test

example 1

[0047] Example one: adopt the present invention to degrade copper nitrate electroplating waste bath liquid:

[0048] Get 4 liters of actual copper nitrate electroplating wastewater from an electroplating factory (after measuring its COD Cr Concentration is 10032mg / L) is put into reaction tank 1, adjusts pH value to 7, and adding concentration is 30% hydrogen peroxide (making H 2 o 2 Concentration is 10g / L) and self-made Cu series nano-catalyst (making the concentration 5g / L), adopt mechanical stirring mode to stir, turn on 80W ultraviolet lamp to start reaction, carry out oxidative degradation. COD at different degradation times Cr The measurement results showed that the CODCr degradation rates of the samples with reaction time of 30min, 90min, and 150min were 18.2%, 49.1%, and 99.1%, respectively, and the final effluent COD Cr It is 90.3mg / L.

[0049] If other conditions are the same, but turn off the UV lamp, COD of samples at 30min, 60min, and 150min Cr The degradation...

example 2

[0050] Example two: adopt the present invention to degrade ink waste water:

[0051] Take a certain amount of actual ink wastewater from an electroplating factory (its COD Cr Concentration is 26192mg / L), adjust the pH value to 3.5 to carry out acid precipitation coagulation precipitation pretreatment, then take 4L supernatant (its COD Cr Concentration is 10372mg / L) is put into reactor, and adds 30% hydrogen peroxide (makes H 2 o 2 Concentration is 10g / L) and self-made Fe, Cu series ion catalyst (making Fe, Cu content to be 1g / L and 0.5g / L respectively), adopt 50L / min air aeration, turn on 80W ultraviolet lamp to start reaction, carry out oxidation degradation. COD at different degradation times Cr The measurement results show that the COD of the samples with a reaction time of 30min, 90min, and 120min Cr The degradation rates are 30.6%, 85.0%, and 99.6% respectively, and the final effluent COD Cr It is 41.5mg / L. In addition, after 90 minutes of treatment, BOD 5 / CODcr ...

example 3

[0052] Example three: adopt the present invention to degrade surfactant wastewater:

[0053] Get 4 liters of certain electroplating factory surfactant wastewater (its COD Cr Concentration is 12032mg / L) puts into reactor, adjusts pH value to 6.5, and adds peroxyacetic acid (making concentration be 11g / L), self-made Fe, P series granular nano-catalyst (making concentration be 2.5g / L), Adopt 50L / min air aeration, turn on 80W ultraviolet lamp to start the reaction, and carry out oxidation degradation. The CODCr measurement results of different degradation times show that the COD of samples with a reaction time of 30min, 90min, and 150min Cr The degradation rates were 18.2%, 49.1%, and 99.8%, respectively, and the final effluent COD Cr It was 24.1mg / L; after 90 minutes of treatment, the BOD was measured by sampling 5 / CODcr increased from 0.12 in raw water to 0.35, and the biodegradability was obviously improved.

[0054] If other conditions are the same, but turn off the UV la...

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Abstract

The invention discloses a method for rapidly and efficiently degrading pollutants through ultraviolet catalytic wet oxidation at the normal temperature and normal pressure and designs a typical device for implementing the method. In the method, ultraviolet light, an oxidant and a catalyst are introduced into a reaction system; and a wet oxidation reaction can be performed under the mild conditions of normal temperature and normal pressure by utilizing the synergistic catalytic oxidation of the ultraviolet light, the oxidant and the catalyst. Compared with the traditional catalytic wet oxidation method which needs to be implemented under the reaction conditions of high temperature and high pressure, the method can be implemented under the conditions of a temperature of between 25 and 80 DEG C and normal pressure, wherein organic pollutants in high-concentration toxic and hazardous waste water can be decomposed to be harmless components such as carbon dioxide (CO2), water and the like through the high oxidizing property; and the removal rate of chemical oxygen demand (COD) chromium (Cr) after the treatment of a plurality of representative high-concentration organic waste water can reach over 95 percent, and the biochemical property can be improved obviously. The method has the advantages of mild reaction, high treating efficiency, complete degradation, clean and environmental-friendly process, energy conservation and wide application prospect.

Description

technical field [0001] The invention discloses an oxidation method and device, in particular a catalytic wet oxidation method and device using ultraviolet strengthening, which are used in the field of sewage treatment, especially for the removal of organic pollutants in high-concentration toxic and harmful wastewater. Background technique [0002] With the rapid development of petroleum, chemical and pharmaceutical industries, the treatment of high-concentration refractory wastewater has become a hot and difficult research topic all over the world. At present, industrial wastewater has new characteristics: on the one hand, the concentration of pollutants is higher; on the other hand, the composition of pollutants is more complex, which reduces the energy efficiency of traditional pollutant wastewater treatment methods. It is difficult to meet the discharge standards for the treatment of high-concentration, refractory pollutant wastewater by methods such as physical and chemi...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/72
Inventor 李朝林陆钢刘鹏崔海波
Owner 李朝林
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