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Method for treating uns-dimethylhydrazine waste gas in combustion of gas fuel and its equipment

A gas fuel and unsymmetrical dimethylhydrazine technology, which is applied in the field of gas fuel combustion to treat unsymmetrical dimethylhydrazine waste gas, can solve problems such as improper concentration control, difficult temperature control, and difficult operation, and achieve low operating costs, thorough treatment, and equipment simple effect

Inactive Publication Date: 2004-03-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorption method is used to absorb the waste gas of unsymmetrical dimethylhydrazine, but the absorption is not thorough enough, and the waste liquid after absorption becomes another source of liquid pollution
The catalytic oxidation method is to directly contact the unsymmetrical dimethylhydrazine and the oxidant, usually air, on the catalyst bed to carry out the catalytic oxidation reaction. There is a hidden danger of explosion, and the catalytic combustion is an exothermic reaction, the reaction is violent, and the heat transfer of the gas-solid reaction is slow. Limitation, the heat released is concentrated and difficult to take out, making it difficult to control the temperature. Once the temperature rises, the life of the catalyst will be shortened and deactivated. Improper concentration control will easily cause explosion and difficult operation.
Therefore, when treating waste gas, the concentration of unsymmetrical dimethylhydrazine should not be too high. For the discharged high-concentration unsymmetrical dimethylhydrazine waste gas, the method of inert gas dilution must be used, which will inevitably prolong the treatment time and increase the cost of waste gas treatment.

Method used

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  • Method for treating uns-dimethylhydrazine waste gas in combustion of gas fuel and its equipment
  • Method for treating uns-dimethylhydrazine waste gas in combustion of gas fuel and its equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] As shown in the figure, 1 is the exhaust gas inlet, 2 is the gas fuel inlet, 3 is the primary air inlet, 4 is the insulation layer, 5 is the furnace body, 6 is the fire viewing hole, 7 is the exhaust port, and 8 is the secondary air inlet , 9 is a temperature measuring hole, 10 is an ignition hole, 11 is a burner, and 12 is a secondary air distribution hole.

[0024] The burner 11 is installed at the front of the furnace body, and the burner is provided with a primary air inlet 3, a gas fuel inlet 2 and (unsymmetrical dimethylhydrazine) exhaust gas inlet 1, and the gas fuel inlet 2 is connected with (unsymmetrical dimethylhydrazine) exhaust gas inlet 1 , the middle and rear of the furnace body 5 are provided with secondary air distribution holes 12, the temperature measuring hole 9 is located in the middle of the furnace body 5, the exhaust port 7 is located at the rear of the furnace body 5, and the fire viewing hole 6 is located at the exhaust On the mouth 7 and on th...

Embodiment 2

[0028] Other conditions are the same as embodiment 1, just change primary air volume into 10 cubic meters / hour (primary air coefficient is 0.80) pass into content simultaneously and be that 7% unsymmetrical dimethyl hydrazine waste gas 5 cubic meters / hour burn together with methanol cracking gas , the total air coefficient is 2.3, the temperature in the furnace is 840°C, the tail gas is sampled and analyzed, and the residual amount of unsymmetrical dimethylhydrazine in the tail gas is less than 2PPm.

Embodiment 3

[0030] Other conditions are with embodiment 1, just change primary air volume into 22.5 cubic meters / hour (primary air coefficient is 0.92), pass into content simultaneously and be 15% unsymmetrical dimethyl hydrazine waste gas 4.8 cubic meters / hour and methanol cracking gas one Combustion, the total air coefficient is 2.1, the temperature in the furnace is 935°C, the tail gas is sampled and analyzed, and the residual amount of unsymmetrical dimethylhydrazine in the tail gas is less than 2ppm.

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Abstract

The present invention uses gas fuel as raw material, lights the burner, and introduces uns-dimethylhydrazine waste gas whose volume persentage concentration is 1-30% of make combustion together to produce water, CO2 and nitrogen gas so as to attain the goal of treating the said waste gas. The gas fuel inlet on the combustion furnace is communicated with waste gas inlet, and the secondary air can be introduced into the furnace cavity by 2-6 stages so as to make waste gas and fual obtain complete combustion. Tests show that its tail gas has no residual uns-dimethylhydrazine, and its tail gas discharge can meet the national discharge standard.

Description

Technical field: [0001] The invention relates to a method and an incinerator for treating unsymmetrical dimethylhydrazine waste gas by burning gas fuel. Background technique: [0002] Since the industrial revolution, human production has been greatly developed, but at the same time it has brought more and more serious pollution to the environment. At present, protecting the environment on which human beings live from being polluted by industrial waste gas has become an extremely important issue. It is well known that there are three major pollution sources of NOx, SO2, and hydrocarbons, but there are still some pollutants that are not known to people, although the emissions are not large, but the harm is more serious, such as unsymmetrical dimethylhydrazine. one. Unsymmetrical dimethylhydrazine is an organic amine, which is generally used as a rocket propellant by the aerospace industry. It is liquid at room temperature. When in use, unsymmetrical dimethylhydrazine needs t...

Claims

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Application Information

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IPC IPC(8): F23G7/06
Inventor 苏化东李雯郑质文张舒清邓惠平张玉珍
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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