Efficient combined dusty syngas washing dust removal device and method thereof

Abstract

The invention discloses an efficient combined dusty syngas washing dust removal device and a method thereof. Firstly dusty syngas enters below the liquid level of a washing cooling chamber along a downcomer, and is fully washed and cooled in a water region, molten slag is solidified and separated, crude syngas with a part of fine ash is discharged out from the washing cooling chamber and gains weight by being wetted by washing liquid with flow speed and angle demands in a Venturi, most liquid drops with fine dust are separated after entering a cyclone separator, and enter a liquid storage tank along a wall, syngas enters a water washing tower along a gas outlet, is sprayed and washed through a tower disc washing cooling chamber, the fine dust in the syngas is further separated, and the syngas which is discharged through a tower top of the water washing tower can completely meet the demands of a downstream section at the moment, and can not increase resistance which is caused by a rear pipeline, a heat exchanger or bed dust. Simultaneously, the efficient combined dusty syngas washing dust removal device is simple and convenient in process, operation and maintenance, excellent in system water quality, long in equipment operation cycle and simple and convenient to clean.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal or coal-water slurry gasification, and relates to an efficient combined dust-containing syngas washing and dedusting device and a method thereof. Background technique [0002] When the synthesis gas comes out of the reaction chamber of the gasifier, it contains certain fine solid particles, mainly residual charcoal and slag, especially for pulverized coal gasification, which has high ash content and small particle size. If it cannot be washed and separated well, it will be The synthesis gas is brought to the rear system, which will cause blockage of pipelines or trays, increase resistance, and affect stable operation. The existing dry ash removal + wet ash removal has complex processes, cumbersome equipment maintenance, high investment and operating costs; the pure wet ash removal has poor washing effect and cannot meet the high standard requirements. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

[0002] When the synthesis gas comes out of the reaction chamber of the gasifier, it contains certain fine solid particles, mainly residual charcoal and slag, especially for pulverized coal gasification, which has high ash content and small particle size. If it cannot be washed and separated well, it will be The synthesis gas is brought to the rear system, which will cause blockage of pipelines or trays, increase resistance, and affect stable operation

The current dry ash removal + wet ash removal has complex processes, cumbersome equipment maintenance, high investment and operating costs; pure wet ash removal has poor washing effect and cannot meet high standards.

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