Multi-stage gas distribution high-temperature coal gasification device and method

Abstract

The invention discloses a multi-stage gas distribution high-temperature coal gasification device and a multi-stage gas distribution high-temperature coal gasification method. According to the device, an oxygen-enriched combustion section, a mixed gasification section, a gasification temperature-rise section and a gasification lifting section are arranged in a gasification reactor from bottom to top and are respectively provided with an independent gasifying agent, so that different reaction conditions of coal in each section are realized, the oxygen-enriched combustion section performs oxygen-enriched combustion on fuel to release heat so as to provide most of the heat needed by a gasification reaction, and the mixed gasification section, the gasification temperature-rise section and the gasification lifting section respectively perform different degrees of combustion and gasification reactions. During multi-stage gas distribution, gas is distributed according to the reaction characteristics of each section, the consumption of oxygen is greatly reduced, and high reaction temperature is kept in the gasification reactor; meanwhile, the temperature is uniformly distributed in the gasification reactor, and gasification with high gasification efficiency, high carbon conversion rate and low pollution is realized.

Description

technical field [0001] The invention relates to a multi-stage gas distribution high-temperature coal gasification device and method, belonging to the coal gasification technology. Background technique [0002] Coal gasification is an important way to efficiently and cleanly utilize coal. It converts primary energy into clean secondary energy, and its product gas can be used as a source of various gases such as fuel gas (coal gas), synthesis gas, hydrogen, and carbon monoxide. Coal gasification technology is widely used in synthetic ammonia, synthetic methanol, sponge iron production and other fields, and its largest potential market is the integrated coal gasification combined cycle (1GCC) power generation field. [0003] The coal gasification technology that has been industrialized can be divided into three categories, namely, fixed bed gasification technology represented by Lurgi technology, fluidized bed gasification technology represented by HTW technology, and Texaco, S...

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Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a multi-stage gas distribution high-temperature coal gasification device and method to solve the problems existing in the existing large-scale coal gasification process and the existing dense-phase transport coal gasification process, It has the advantages of good adaptability to coal types, reasonable temperature distribution, high gasification efficiency, high carbon conversion rate, and low pollution.

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