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Method for removing waste gas uns-dimethylhydrazine in combustion of alcohol and its equipment

A technology of alcohol fuel and unsymmetrical dimethylhydrazine, which is applied in the field of incinerators, can solve the problems of increasing the cost of waste gas treatment, difficulty in taking out concentrated heat, shortening catalyst life, etc., and achieves the effects of easy operation, convenient transportation, and thorough waste gas treatment

Inactive Publication Date: 2004-07-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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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 removing waste gas uns-dimethylhydrazine in combustion of alcohol and its equipment
  • Method for removing waste gas uns-dimethylhydrazine in combustion of alcohol and its equipment
  • Method for removing waste gas uns-dimethylhydrazine in combustion of alcohol and its equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The primary air is introduced from the primary air inlet 2, and the flow rate is adjusted to 33 cubic meters per hour (that is, the primary air coefficient is 1.3), and the secondary air is introduced from the secondary air inlet 8 to 72 cubic meters per hour, and then methanol is introduced, and at the same time Ignition hole 3 ignites the main burner, the methanol feed rate is 5 kg / hour, and the combustion is stable for 20 minutes. The furnace body is preheated. When the furnace temperature reaches 500 ° C, 6 cubic meters / hour of partial dimethyl The exhaust gas with 1% hydrazine, the exhaust gas enters the furnace body and burns together with kerosene, the total air coefficient is 4, the temperature in the furnace is controlled at 800-1500°C, the exhaust exhaust gas is sampled and analyzed through the detection hole 13, the residual amount of unsymmetrical dimethylhydrazine in the exhaust gas Not detected (less than 1ppm), the total hydrocarbon is 5.5 mg / m3, reaching ...

Embodiment 2

[0028] Other conditions are the same as embodiment 1, just change the content of unsymmetrical dimethylhydrazine in waste gas to 7%, discharge tail gas through analysis, unsymmetrical dimethylhydrazine content can't be detected (less than 1ppm), other emissions in the exhaust gas all reach discharge requirements.

Embodiment 3

[0030] Other conditions are the same as in Example 1, except that the primary air flow rate is changed to 49 cubic meters per hour (primary air coefficient is 1.3), the unsymmetrical dimethylhydrazine content is 11% in the waste gas, and the total air coefficient is 3.1, and the tail gas analysis result: partial two The content of methylhydrazine was not detected (less than 1ppm), and the content of other substances all reached the national discharge standard.

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Abstract

The present invention uses fuel alcohol as fuel, lights the burner and introduces uns-dimethylhydrazine waste gas whose volume percentage concentration is 1-30% to make combustion together to produce water, CO2 and nitrogen gas so as to attain the goal of treating uns-dimethylgy drazine waste gas. Its combustion furnace is simple in structure, the interior of furnace cavity is equipped with waste gas distributing rings so as to make waste gas obtain full combustion, and tests show that its tail gas contains no residual uns-dimethylhydrazine, and its tail gas discharge can meet the discharge standard.

Description

Technical field: [0001] The invention relates to a method and an incinerator for removing unsymmetrical dimethylhydrazine waste gas by burning alcohol 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 nee...

Claims

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Application Information

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IPC IPC(8): F23G7/06
Inventor 李雯苏化东郑质文董根全曹立仁刘东勋孙吉献吴志勇熊万忠刘卫东耿枝
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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