A gasifier structure capable of processing pulverized coal and coal-water slurry at the same time

Abstract

The invention relates to a gasification furnace structure capable of treating pulverized coal and water coal slurry simultaneously. The gasification furnace structure comprises a furnace body, wherein a water cooling wall is arranged in the furnace body and a quenching chamber is arranged under a gasification chamber; the gasification furnace structure is characterized in that a water coal slurry nozzle is arranged at the top part of the furnace body, at least three pulverized coal nozzles are arranged at the upper part of the side wall of the gasification furnace body and are uniformly distributed on the same horizontal circumference along the furnace body, two sets of start-up burners are also symmetrically arranged on the side wall of the furnace body, a slag hole is formed at the bottom of the furnace body, and a slag breaking machine is arranged on the slag hole. The gasification furnace structure has strong coal type adaptive capacity and can treat pulverized coal and water coal slurry simultaneously, inferior coal with high ash melting point, high ash content, high sulphur content and high alkali metal content can be mixed for combustion, and the single furnace has high handling capacity and low energy consumption.

Description

technical field [0001] The invention relates to chemical equipment, in particular to a gasifier structure capable of simultaneously processing gasified pulverized coal and coal-water slurry. Background technique [0002] Coal gasification is to use a gasification agent to react with combustibles in coal at high temperature to generate combustible gas, which is used to prepare clean gas. Coal gasification is an important process technology for clean coal. [0003] The coal gasification process mainly includes pulverized coal gasification and coal water slurry gasification. The raw material for pulverized coal gasification is dry pulverized coal, which is sent to the gasifier for gasification through high-pressure nitrogen. The raw material of coal-water slurry gasification is a mixture of pulverized coal with a certain particle size, water and additives in a certain proportion. The mixture has fluidity and stability, and can be pumped, atomized and stably burned. It can be...

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Problems solved by technology

Among them, the coal-water slurry gasification process has the advantages of good stability, high operating efficiency, medium comprehensive energy consumption, simple furnace structure, and simple coal slurry transportation equipment; The carbon conversion rate is low, the effective components in the treated synthesis gas are not high, and the life of the coal water slurry burner is short, and the life of the refractory brick is short

Pulverized coal gasification coal has strong adaptability, high carbon conversion rate, high content of effective components in syngas, large production capacity, and environmental friendliness; however, the equipment is complex, large investment, and high comprehensive energy consumption

[0005] These two processes have their own outstanding advantages and obvious disadvantages. How to integrate the advantages of the two coal gasification processes of coal water slurry gasification and pulverized coal gasification, and discard the shortcomings of the two coal gasification processes has become a technology for the development of new coal gasification processes. problem

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