Low-temperature environment used hydrazine-containing exhaust gas treatment device and method thereof

Abstract

The invention provides a low-temperature environment used hydrazine-containing exhaust gas treatment device. The hydrazine-containing exhaust gas treatment device comprises a catalytic reaction tower, wherein the catalytic reaction tower comprises a gas inlet pipeline, a catalytic reaction zone and a gas outlet pipeline, the gas inlet pipeline is arranged at the bottom, the gas outlet pipeline is arranged at the upper part, and the catalytic reaction zone is arranged in an area between the gas inlet pipeline and the gas outlet pipeline; a composite catalyst is arranged in the catalytic reaction zone in a grouped and layered manner, and the composite catalyst bulk density of the bottom of the catalytic reaction zone is higher than that of the upper part of the catalytic reaction zone; and heating devices are arranged on peripheral tower walls of the catalytic reaction zone. According to the hydrazine-containing exhaust gas treatment device applicable to the low-temperature environment, the problems that hydrazine-containing exhaust gas treatment equipment is poor in low-temperature adaptability, is complicated and the like are solved, hydrazine-containing exhaust gas treatment can be carried out in plateau and North low-temperature environments, and standard reaching emission is achieved.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a hydrazine-containing waste gas treatment device and method suitable for low-temperature environments. Background technique [0002] At present, for aircraft in high altitude and low temperature environment, most of the cases use spray type exhaust gas treatment equipment to treat hydrazine-containing exhaust gas. Spray-type exhaust gas treatment equipment uses water-based treatment fluid as the working medium, which has a high freezing point. If no measures are taken to lower the freezing point, the working medium will freeze and cannot work normally, and even cause damage to the equipment in severe cases. If measures to lower the freezing point are taken, the efficiency of the treatment of hydrazine-containing waste gas will be significantly reduced, making it difficult to ensure compliance with emission standards. Since the existing equipment is difficult to meet...

AI Technical Summary

Problems solved by technology

This device uses the combustion method to treat the waste gas of unsymmetrical dimethylhydrazine. Since the combustion process needs to continuously add fuel oil to support the combustion, it brings a lot of inconvenience to the waste gas treatment process.

Secondly, the combustion temperature of the hydrazine-containing waste gas treatment process by the combustion method is 500-800°C, which leads to a low safety factor and is not suitable for use under harsh environmental conditions

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