Hydrogen peroxide-ozone-ultraviolet joint treatment method for unsymmetrical dimethylhydrazine sewage

A technology of hydrogen peroxide and unsymmetrical dimethylhydrazine, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, multi-stage water treatment, etc., can solve the problems of low oxidation efficiency, high oxidation cost, and undiscovered problems, and achieve degradation High efficiency, faster response speed, and improved response reliability

Inactive Publication Date: 2017-04-05
中国人民解放军63605部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(4) Ozone oxidation method: the use of ozone (O 3 ) as an oxidant to oxidize substances is one of the advanced oxidation technologies, but in the process of treating unsymmetrical dimethylhydrazine sewage, highly toxic oxidation products will appear, and there are defects of high oxidation cost and low oxidation efficiency
[0004] In recent years, advanced oxidation treatment methods such as combined ozone-ultraviolet treatment have been developed, which can oxidize and decompose many refractory organic substances, and have been widely studied and applied in the field of organic sewage treatment. However, after searching domestic and foreign patent documents, for partial Dimethylhydrazine, a highly toxic and refractory sewage, has not yet found a successful example of using a similar method, and has not yet found a successful technology for treating unsymmetrical dimethylhydrazine sewage with ozone-ultraviolet oxidation after pretreatment with hydrogen peroxide.

Method used

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  • Hydrogen peroxide-ozone-ultraviolet joint treatment method for unsymmetrical dimethylhydrazine sewage
  • Hydrogen peroxide-ozone-ultraviolet joint treatment method for unsymmetrical dimethylhydrazine sewage
  • Hydrogen peroxide-ozone-ultraviolet joint treatment method for unsymmetrical dimethylhydrazine sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Take the unsymmetrical dimethylhydrazine sewage with a treatment concentration of 1% and a treatment volume of 18L as an example.

[0044] The oxygen cylinder is filled with industrial oxygen, the pressure P≤15MPa, and the oxygen is oxygen with a purity greater than 99.9%.

[0045] The ozone generator is a high-voltage discharge ozone generator commonly used in the field, and the output of the oxygen source is 20g / h.

[0046] Steps:

[0047] (1) Filling with sewage: Fill the stainless steel reactor with sewage from the sewage inlet.

[0048] (2) Add hydrogen peroxide: add hydrogen peroxide from the sewage inlet to the stainless steel reactor, the ratio of hydrogen peroxide to unsymmetrical dimethylhydrazine is 6:1, adjust the pH to 9.3, and open the oxygen cylinder , Oxygen is blown into the reactor through the oxygen line.

[0049] (3) Turn on the ultraviolet lamp, which is a combination of a vacuum ultraviolet (VUV) lamp with a power of 120W (wavelength 185nm) and ...

Embodiment 2

[0054] Take the unsymmetrical dimethylhydrazine sewage with a treatment concentration of 1% and a treatment volume of 18L as an example.

[0055] The oxygen cylinder is filled with industrial oxygen, the pressure P≤15MPa, and the oxygen is oxygen with a purity greater than 99.9%.

[0056] The ozone generator is a high-voltage discharge ozone generator commonly used in the field, and the output of the oxygen source is 20g / h.

[0057] Steps:

[0058] (1) Filling with sewage: Fill the stainless steel reactor with sewage from the sewage inlet.

[0059] (2) Add hydrogen peroxide: add hydrogen peroxide to the stainless steel reactor from the sewage inlet, the ratio of hydrogen peroxide to unsymmetrical dimethylhydrazine is 4:1, adjust the pH to 8.7, and open the oxygen cylinder , Oxygen is blown into the reactor through the oxygen line.

[0060] (3) Turn on the ultraviolet lamp, which is a combination of a vacuum ultraviolet (VUV) lamp with a power of 120W (wavelength 185nm) and ...

Embodiment 3

[0065] Take the unsymmetrical dimethylhydrazine sewage with a treatment concentration of 1% and a treatment volume of 18L as an example.

[0066] The oxygen cylinder is filled with industrial oxygen, the pressure P≤15MPa, and the oxygen is oxygen with a purity greater than 99.9%.

[0067] The ozone generator is a high-voltage discharge ozone generator commonly used in the field, and the output of the oxygen source is 20g / h.

[0068] Steps:

[0069] (1) Filling with sewage: Fill the stainless steel reactor with sewage from the sewage inlet.

[0070] (2) Add hydrogen peroxide: add hydrogen peroxide to the stainless steel reactor from the sewage inlet, the ratio of hydrogen peroxide to unsymmetrical dimethylhydrazine is 5:1, adjust the pH to 9.0, and open the oxygen cylinder , Oxygen is blown into the reactor through the oxygen line.

[0071] (3) Turn on the ultraviolet lamp, which is a combination of a vacuum ultraviolet (VUV) lamp with a power of 120W (wavelength 185nm) and ...

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Abstract

The invention relates to a hydrogen peroxide-ozone-ultraviolet joint treatment method for unsymmetrical dimethylhydrazine sewage. According to the method, the unsymmetrical dimethylhydrazine sewage and hydrogen peroxide are mixed according to the substance amount ratio of 4:1 to 6:1, after stirring pretreatment is performed for 24 hours through oxygen blowing, ozone and ultraviolet are used for performing oxidization treatment, the degradation rate of unsymmetrical dimethylhydrazine can reach 99.999% or above after oxidization treatment, and a treated product meets the requirement of the national spaceflight propellant water pollutant discharging standard. The treatment method for the unsymmetrical dimethylhydrazine sewage is high in efficiency, thorough in treatment, good in economic performance and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for jointly treating unsymmetrical dimethylhydrazine sewage with hydrogen peroxide-ozone-ultraviolet rays. [0002] technical background [0003] Due to its high stability, high combustion calorific value and high specific impulse, unsymmetrical dimethylhydrazine (UDMH) is widely used in missile and aerospace fields. With the rapid development of my country's aerospace and satellite industries, UDMH production, During transportation and use, a large amount of unsymmetrical dimethylhydrazine sewage will be produced. Partial hydrazone, tetramethyltetrazene, nitrosodimethylamine, formaldehyde, etc. produced in the process of sewage oxidation have high toxicity and stability, and are carcinogenic and mutagenic. If the sewage treatment of unsymmetrical dimethylhydrazine is not timely or incomplete, it will cause great harm to the environment and human body. The tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F101/38
CPCY02W10/37C02F9/00C02F1/32C02F1/66C02F1/72C02F1/722C02F1/78C02F2101/38C02F2301/08
Inventor 徐泽龙张立清黄凌志焦天恕刘林王莹吴翼李楠
Owner 中国人民解放军63605部队
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