Dry coal powder gasification ash removal device sharing exhaust filter

Abstract

The invention discloses a dry coal powder gasification ash removal device sharing an exhaust filter. The device is characterized in that the outlet of an ash-containing synthesis gas pipeline is communicated with the inlet of a fly ash filter, the top outlet of the fly ash filter is communicated with a clean synthesis gas pipeline, the bottom outlet of the fly ash filter is communicated with the inlet of a fly ash storage tank, the bottom outlet of the fly ash storage tank is communicated with the inlet of a fly ash lock hopper, the bottom outlet of the fly ash lock hopper is communicated with the inlet of a fly ash gas stripping tank, the bottom outlet of the fly ash gas stripping tank is communicated with the inlet of a fly ash cylinder bin, and the bottom outlet of the fly ash cylinder bin is communicated with an external fly ash discharge pipeline. According to the invention, by sharing one exhaust filter and one blowback system, each stage of exhaust filter system is omitted; and exhaust of the fly ash lock hopper, the fly ash gas stripping tank and the fly ash cylinder bin is completely introduced into the exhaust filter for filtering and blowback, so that the structure is simple, the equipment investment is saved, the frame height is reduced, and the use amount of blowback nitrogen is reduced.

Description

technical field [0001] The invention belongs to the field of coal gasification, and relates to a dry coal powder gasification ash removal device, in particular to a dry coal powder gasification ash removal device sharing an exhaust filter. Background technique [0002] Coal gasification is an important technology and main means to realize the comprehensive utilization of coal and clean coal technology, and it is the leader in the development of modern coal chemical industry, coal-to-oil, fuel gas and other industrial production. Dry ash removal system is an important unit of coal gasification, which is characterized by high ash removal efficiency, no sewage discharge, environmental protection and high efficiency. After the fly ash produced by coal gasification leaves the gasifier and waste pot with the synthesis gas, it first passes through the fly ash filter for dry ash removal. The filter removes most of the fly ash in the synthesis gas, and then enters the wet washing pro...

AI Technical Summary

Problems solved by technology

During the entire ash discharge process, it is necessary to charge and release the pressure and to strip and exhaust. In the traditional process, each exhaust device is equipped with a corresponding exhaust filter and a nitrogen reactor that matches the exhaust filter. Blowing system, resulting in more dry ash removal system equipment, high investment, more cumbersome process; and back blowing nitrogen consumption is more, affecting the synthesis gas composition

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