Plasma coal gasifying process and device

Abstract

The present invention discloses a coal gasifying plasma process and apparatus. After work gas is sprayed into plasma generator and the power supply is applied to produce plasma field, synthetic gas and preheated coal powder are sprayed into the plasma generator for reaction to generate mixed gas; the mixed gas is made to pass through water-gas heat exchanger and enter the gas-solid separator to separate coal ash falling into coal ash tank and synthetic gas entering the bag-type dust collector for further separation; of the separated synthetic gas, great amount is output as the product while part is fed to coal powder pipe and synthetic gas pipe; and plasma generator electrode cooling water is fed to the preheater before being synthesized into steam sprayed to inner wall of the plasma generator to avoid coking. The present invention has reasonable technological process, compact structure, no environmental pollution, long continuous running time, high coal gasifying rate and high efficiency.

Description

technical field [0001] The invention relates to a coal gasification process and equipment, in particular to a plasma coal gasification process and device. Background technique [0002] Coal gasification is one of the key technologies of coal chemical industry. The existing coal gasification process can be divided into three categories: fixed bed, fluidized bed and entrained bed. Lurgi technology is a typical representative of fixed-bed coal gasification technology, which has high requirements on coal quality and can only use lump coal as raw material; high-temperature Wenkler technology is a representative of fluidized bed technology, and this kind of technology has the problem of "vomiting up and down". problems, resulting in low conversion rate; the entrained bed process can be divided into dry feed and wet feed, Shell is the entrained bed technology of dry feed, Texaco and Dow are the entrained bed technology of wet feed, However, it is required to match the ash melting...

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Problems solved by technology

[0005] On the basis of the above-mentioned existing plasma coal gasification process and device, the present invention proposes a plasma coal gasification process and device to solve the problems of the existing plasma coal gasification process and device, such as the problem of coking on the inner wall of the reactor, due to coking The problem of short continuous operation time, the problem of small gasification load of a single plasma coal gasification device, the N 2 The subsequent utilization of nitrogen compounds and gasification products in the gasification device requires expensive denitrification treatment; the problem of low thermal efficiency of the plasma coal gasification device to improve and further improve the coal gasification process and coal gasification efficiency

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