Gas cooling scrubber

Abstract

The invention discloses a gas cooling washing device which comprises a housing, a gas guide pipe and a bubbling liquid pool arranged at the lower part of the housing, wherein a gas inlet and a gas outlet are formed at the upper part of the housing; the gas guide pipe is communicated with the gas inlet and extends into the bubbling liquid pool; a first-stage cooling washing part is arranged at the upper end of the gas guide pipe; the gas cooling washing device further comprises a second-stage cooling washing part for cooling and washing fine ash entrained in gas; the second-stage cooling washing part is arranged in an annular space between the housing and the gas guide pipe and is located above the liquid level of the bubbling liquid pool and under the outlet of the gas. Due to adoption of a double-spray manner, the gas cooling washing device disclosed by the invention can separate fine ash entrained in a gas phase of coarse synthesis gas, wherein the grain size of the fine ash is greater than 300 microns. The heat mass transfer effect is improved and the treatment load of subsequent equipment is alleviated.

Description

technical field [0001] The invention relates to a gas cooling and washing device, which is especially suitable for washing crude synthetic gas. Background technique [0002] Gasifiers are mostly used to process and produce crude synthetic gas, which is produced from hydrocarbons such as coal, natural gas, shale gas, petroleum coke, biomass, and sludge, and is produced in the form of H 2 , CO, CO 2 As the main component, the general pressure of its gasification operation is 0.2MPa~12MPa, and the temperature is 1000℃~1800℃. Entrained bed gasification technology is a leading technology and core technology for coal-based cleanliness, high-efficiency utilization, and large-scale operation. [0003] The coal gas produced by the gasifier contains ash, and its dry gas components are CO and H 2 75% to 94%, CO 2 2% to 23%, N 2 , Ar, H 2 S, COS, NH 3 , HCl, CH 4 , HCN, HCOOH, etc. are 3% to 5%. In order to use synthetic gas to produce synthetic ammonia, methanol, oil products,...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the defect of large amount of gas fine ash after the first-stage cooling and filtering of the gas cooling and washing device in the prior art, and to provide a gas cooling and washing device and its industrial application

It solves the problem of slag blocking and ash accumulation in the cooling washing room or subsequent gas washing system caused by the high ash content of raw coal and the high viscosity of coal ash at high temperature, etc., and reduces the processing load of subsequent washing equipment

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