Swirl injection type coal water slurry gasification device

Abstract

The invention relates to a swirl injection type coal water slurry gasification device, comprising a coal water slurry preparation mechanism, a gasification mechanism, a waste heat recovery mechanism and a washing mechanism, wherein the gasification mechanism comprises a gasification furnace, a coal gas outlet at the top part of the gasification furnace is connected with a chilling mechanism and a hot coal gas pipe sequentially, an adiabatic wall is arranged in the gasification furnace and extends from the top part to the lower part of the gasification furnace, a conical slag discharge hole is formed in the lower part of the adiabatic wall, a plurality of nozzles penetrating through the gasification furnace and the adiabatic wall are arranged at the middle part of the gasification furnace in the radial direction, a slag bath is arranged at the bottom of the gasification furnace, a slag crusher and a lock hopper are sequentially arranged at the bottom of the slag bath, the waste heat recovery mechanism comprises a cyclone separator connected with the hot coal gas pipe and a convection waste heat boiler connected with the cyclone separator, the washing mechanism comprises a washing tower communicated with the convective syngas cooler by a washer, and a water outlet of the washing tower is communicated with the washer by a washing pump. The swirl injection type coal water slurry gasification device solves the problems of low slurrying concentration, crown brick ablation, poor flow field, low carbon conversion rate, poor coal slurry atomization effect, large system water consumption quantity, no recovery of waste heat and the like.

Description

technical field [0001] The invention relates to a coal-water slurry gasification device, in particular to a high-efficiency coal-water slurry gasification gasification device with the functions of swirling jetting of coal-water slurry and waste heat recovery. Background technique [0002] At present, coal gasification technology is divided according to the form of gasifier, and there are three main categories: fixed bed, fluidized bed and entrained bed. Fixed bed gasification has the problems of high raw material requirements, low production pressure, and large environmental pollution; although fluidized bed gasification has a large number, there are also certain problems in engineering, and the environmental pollution is relatively large; entrained bed gasification is currently It is mainly used in the coal chemical industry sector. The main feature of the entrained flow bed is that the raw materials are easy to obtain. Bituminous coal powder is used, and the raw material p...

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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a swirling jet coal-water slurry gasification device to solve the problem of low pulping concentration, ablation vault brick, poor flow field, low carbon conversion rate and coal slurry in the prior art. The atomization effect is not good, the system consumes a lot of water, and the waste heat cannot be recovered, etc.

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