Entrained-bed gasifier

Abstract

The invention discloses an entrained-bed gasifier, relates to the technical field of gasifiers, and solves the problems that the hydrogen consumption is relatively high and the carbon converting efficiency is relatively low in coal hydrogenation gasification process because during gasification reaction of the existing entrained-bed gasifier, combustion of a part of hydrogen is required for preheating, and semicoke is not effectively utilized. The entrained-bed gasifier provided by the invention comprises a gasifier outer barrel, wherein a reaction inner barrel is fixed in an upper area inside the gasifier outer barrel; a solid material nozzle is formed in the top end of the gasifier outer barrel; the solid material nozzle is formed by facing a top inlet of the reaction inner barrel; a baffle is arranged below a bottom outlet of the reaction inner barrel; a feed gas nozzle is formed in the side wall of the gasifier outer barrel; the feed gas nozzle is formed in the upper side of the baffle; a gasifying agent inlet is formed in the bottom end of the gasifier outer barrel. The entrained-bed gasifier is mainly applied to hydrogenation gasification reaction of coal.

Description

technical field [0001] The invention relates to the technical field of gasification furnaces, in particular to an entrained-bed gasification furnace. Background technique [0002] The gasification reaction of coal hydrogenation is a thermochemical process, using pulverized coal (usually pulverized coal with a diameter of less than 75 μm) as raw material and hydrogen as the gasification agent to generate crude gas and light tar under high temperature and high pressure conditions. Among them, the crude gas can be obtained through separation and other operations to obtain methane-enriched gas. [0003] At present, the pulverized coal hydrogasification process mainly adopts the entrained bed gasifier. In the prior art, the entrained bed gasifier is usually equipped with a pulverized coal nozzle and a hydrogen nozzle on the top of the gasifier, and a crude gas outlet and a semi-coke outlet at the bottom; where the hydrogen nozzle is usually connected to a hydrogen heating furnac...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an entrained-flow gasifier, which solves the problem that when using the entrained-flow gasifier in the prior art for gasification reaction, it needs to burn part of the hydrogen for preheating, and the semi-coke is not effectively used, which leads to coal fueling. The problem of large hydrogen consumption and low carbon conversion efficiency in the hydrogen gasification process

Images