Heavy tar and fine powder treatment method

Abstract

The invention relates to the technical field of coal catalytic gasification, in particular to a heavy tar and fine powder treatment method. Heavy tar and fine powder can be converted into a light-weight oil product, so that conditions are created for the clean and efficient utilization of coal. The embodiment of the invention provides the heavy tar and fine powder treatment method. The heavy tar and the fine powder respectively contain catalysts. The method comprises the following steps that activation treatment is performed on the heavy tar to obtain the heavy tar subjected to activation treatment; the activation treatment is performed on the fine powder to obtain the fine powder subjected to the activation treatment; wherein the heavy tar subjected to the activation treatment comprises a first active intermediate, and the fine powder subjected to the activation treatment comprises a second active intermediate; 2, the heavy tar subjected to the activation treatment and the fine powder subjected to the activation treatment are mixed; the mixture is introduced into a supercritical reactor; under the supercritical state of an organic solvent, the first active intermediate and the second active intermediate take a reaction to produce the light-weight oil product and ash slag.

Description

technical field [0001] The invention relates to the technical field of coal catalytic gasification, in particular to a method for processing heavy tar and fine powder. Background technique [0002] Coal catalytic gasification technology refers to the technology in which coal and gasification agent (steam, oxygen, etc.) undergo a gasification reaction under the catalytic action of a catalyst to generate high-concentration methane and by-product tar. Usually, before the coal catalytic gasification reaction, The catalyst is loaded in the coal powder to improve the catalytic gasification effect. During the coal catalytic gasification reaction process, specifically, the coal powder enters the gasifier from the feed port and undergoes a pyrolysis reaction under the fluidization of the gasification agent. Produce crude gas, light oil, and heavy tar, and collapse into a large amount of fine powder under the action of thermal shock. Among them, the residence time of fine powder in th...

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Problems solved by technology

[0003] Therefore, it is difficult to effectively utilize a large amount of fine powder and heavy tar produced by coal catalytic gasification reaction, which has become a difficult problem restricting the clean and efficient utilization of coal.

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