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Method and device for heterogeneously catalyzing oxidation of COD in wastewater by using hydrogen peroxide

A technology for heterogeneous catalysis and oxidation of wastewater, which is applied in chemical instruments and methods, oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problem of large amount of hydrogen peroxide and reuse of liquid Fenton reagent Difficulties and other problems, to achieve the effect of reducing waste, improving COD removal rate, and reducing the amount of hydrogen peroxide

Inactive Publication Date: 2017-12-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is: in order to solve the difficulty of reusing the liquid Fenton's reagent existing in COD of hydrogen peroxide oxidation wastewater and the problem of large amount of hydrogen peroxide, a method of using a solid catalyst to catalyze the oxidation of hydrogen peroxide to treat COD in wastewater can be greatly reduced The method and realization device of hydrogen peroxide dosage

Method used

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  • Method and device for heterogeneously catalyzing oxidation of COD in wastewater by using hydrogen peroxide
  • Method and device for heterogeneously catalyzing oxidation of COD in wastewater by using hydrogen peroxide
  • Method and device for heterogeneously catalyzing oxidation of COD in wastewater by using hydrogen peroxide

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Embodiment 1

[0039] A hydrogen peroxide heterogeneous catalytic oxidation wastewater treatment device (fixed bed, such as figure 1 shown), specifically a wastewater oxidation tower, including a hydrogen peroxide storage tank 3 and a wastewater storage tank 4 located at the upper part of the tower body, a fixed bed solid catalyst layer 12 in the middle of the tower body and a water distributor 11 at the lower part of the tower body;

[0040] The waste water tank 4 is connected to the waste water inlet pipe 1, and the hydrogen peroxide tank 3 is connected to the hydrogen peroxide water inlet pipe 2;

[0041] The waste water tank 4 is connected with the waste water inlet 9 at the bottom of the waste water oxidation tower, and a waste water drain valve 5 and a waste water delivery pump 8 are arranged on the connecting pipeline;

[0042] The hydrogen peroxide tank 3 is connected with the hydrogen peroxide inlet 10 at the bottom of the waste water oxidation tower, and a hydrogen peroxide drain v...

Embodiment 2

[0045] A hydrogen peroxide heterogeneous catalytic oxidation wastewater treatment device (fluidized bed, such as figure 2 shown),

[0046] Specifically, it is a waste water oxidation tower, including a hydrogen peroxide storage tank 3 and a waste water storage tank 4 located at the upper part of the tower body, a fluidized bed solid catalyst layer 12 at the middle part of the tower body and a water distributor 11 at the lower part of the tower body;

[0047] The waste water tank 4 is connected to the waste water inlet pipe 1, and the hydrogen peroxide tank 3 is connected to the hydrogen peroxide water inlet pipe 2;

[0048] The waste water tank 4 is connected with the waste water inlet 9 at the bottom of the waste water oxidation tower, and a waste water drain valve 7 and a waste water delivery pump 8 are arranged on the connecting pipeline;

[0049] The hydrogen peroxide tank 3 is connected with the hydrogen peroxide inlet 10 at the bottom of the waste water oxidation tower...

Embodiment 3

[0057] A method for hydrogen peroxide heterogeneously catalyzed oxidation of COD in wastewater (using the device of Embodiment 1), the steps are:

[0058] (1) Pass the wastewater with a COD concentration of 100 mg / L through the wastewater inlet pipe 1, and the hydrogen peroxide with a mass concentration of hydrogen peroxide of 27.5% through the hydrogen peroxide inlet pipe 2 to the hydrogen peroxide storage tank 3 and the wastewater at the upper part of the wastewater oxidation tower. In the storage tank 4; then the liquid in the hydrogen peroxide storage tank 3 is passed through the hydrogen peroxide drain valve 6 and the hydrogen peroxide delivery pump 7, and enters the inlet of the water distributor 11 at the lower part of the tower body by the hydrogen peroxide inlet 10; the liquid in the waste water storage tank 4 is drained through the waste water The valve 5 and the wastewater delivery pump 8 enter the inlet of the water distributor 11 at the lower part of the tower from...

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Abstract

The invention relates to a method and a device for heterogeneously catalyzing oxidation of COD in wastewater by using hydrogen peroxide. The method comprises the following steps: decomposing hydrogen peroxide into hydroxyl radical with higher oxidization performance by using a solid catalyst, then carrying out oxidization reaction with organic matters in the wastewater via the hydroxyl radical, converting the organic matters into carbon dioxide and water and achieving the purpose of reducing COD in the wastewater. According to the method, the mass ratio of hydrogen peroxide to COD in the wastewater is (0.5-1) to 1, and the ratio of the mass of the solid catalyst to the flow of hydrogen peroxide is 1 to (100-300). A catalytic oxidation tower for implementing the method is designed; a wastewater tank and a hydrogen peroxide tank are formed in the upper part of the tower; a catalyst area is arranged at the middle part of the tower; a water distribution area is arranged at the lower part of the tower. The method and the device have the advantages that the effect of recycling a hydrogen peroxide liquid Fenton catalyst is realized, the generation amount of sludge is low, the consumption of hydrogen peroxide is reduced, the device is ingenious and reasonable in design, and the overall device can reduce investment and improve the removal rate of COD.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and relates to a method and a device for heterogeneously catalytically oxidizing COD in waste water with hydrogen peroxide, and in particular to a method and a device for treating COD in waste water by using a solid catalyst to catalyze the decomposition of hydrogen peroxide into hydroxyl radicals. Background technique [0002] A large amount of industrial wastewater and urban wastewater are produced in the process of human production and life, which contain a large amount of benzene series, organic nitriles and phenols. Such pollutants belong to the pollution indicators strictly controlled by the state. The commonly used removal methods include air flotation, precipitation, adsorption, filtration and biological methods. These methods have limited ability to remove COD and cannot perform advanced treatment. Later, people proposed the oxidation method. There are two types of oxidants in this ...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/889
CPCB01J23/8892C02F1/722C02F1/725C02F2305/02
Inventor 张昭良蔡连国辛颖李倩
Owner UNIV OF JINAN
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