Self-heating scrubber tower applied to gas scrubbing

Abstract

The invention discloses a self-heating scrubber tower applied to gas scrubbing. The self-heating scrubber tower comprises a scrubber tower shell, a water bath scrubbing section, a tray scrubbing section, a gas preheating section and a gas overheating section, the washing tower shell has a pressure-bearing characteristic, and a water bath washing section, a tower tray washing section, a coal gas preheating section and a coal gas overheating section are sequentially arranged in the washing tower shell from bottom to top. The invention has the effects that: after water bath washing, tower tray washing, and gas preheating section and gas overheating section treatment at the upper part of the washing tower are carried out, the problem of pipeline corrosion of gas at the outlet of the washing tower with saturated water vapor and liquid water hard gas can be avoided; in addition, after the temperature of the coal gas discharged from the washing tower is increased, equipment such as a steam-water separator in a downstream process can be canceled; therefore, after the gas is washed by the washing tower, the purposes of dust removal and overheating of the gas are achieved, the problems of corrosion of a synthesis gas outlet pipeline and overhigh material selection of an existing device are avoided, the subsequent gas processing procedure flow can be simplified, and the equipment investment of a subsequent system can be reduced.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a self-heating scrubber applied to coal gas scrubbing. Background technique [0002] Coal gasification technology, as an advanced technology for clean coal utilization, is the basis of modern coal chemical industry. After years of technology research and development and industrial application, coal gasification gas washing technology is generally divided into dry ash removal and wet ash removal. Among them, wet ash removal has become the main method of coal gasification ash removal due to its simple operation and low equipment investment. [0003] The main problem of traditional wet ash removal is that the gas leaving the scrubber contains a certain amount of saturated water vapor and a small amount of liquid water. Therefore, the corrosion of hydrogen sulfide and chloride ions must be considered in the selection of gas pipeline materials. And because there will be con...

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Problems solved by technology

[0003] The main problem of traditional wet ash removal is that the gas leaving the scrubber contains a certain amount of saturated water vapor and a small amount of liquid water. Therefore, the corrosion of hydrogen sulfide and chloride ions must be considered in the selection of gas pipeline materials. And because there will be condensation in the pipeline, steam-water separation and further ash removal will be required in the subsequent downstream processes

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