Gasification furnace and hydrogasification method for coal

Abstract

The invention provides a gasification furnace and a hydrogasification method for coal to overcome the problem of waste of energy in re-gasification of semi-coke during hydrogasification of coal, belonging to the technical field of coal gasification. The gasification furnace comprises a furnace body, a coal dust nozzle, a hydrogen-containing gas nozzle, an inner reaction cylinder with an open top and a gasification agent inlet, wherein the coal dust nozzle and the hydrogen-containing gas nozzle are both installed at the bottom of the furnace body, the inner reaction cylinder is arranged at the lower part in the furnace body, the coal dust nozzle and the hydrogen-containing gas nozzle are communicated with the interior of the inner reaction cylinder, the inner reaction cylinder is used for hydrogasification of coal to produce crude gas and semi-coke, the gasification agent inlet is communicated with the bottom of an annular space located between the inner reaction cylinder and the furnace body, and the gas velocity of a gasification agent introduced via the gasification agent inlet enables the semi-coke to fall into the annular space and to undergo gasification reaction with the gasification agent again so as to produce crude gas. The gasification furnace and the hydrogasification method for coal provided by the invention are used for hydrogasification of coal and graded conversion of low-rank coal.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a gasification furnace and a coal hydrogenation gasification method. Background technique [0002] my country is rich in coal resources, and nearly 80% of them are low-rank coals. The direct use of these low-rank coals will cause serious pollution to the environment. In order to improve the utilization value of coal and reduce environmental pollution, coal gasification technology can be used to convert coal into For gas and tar, and then the gas and tar are utilized. [0003] One of the more commonly used technologies in coal gasification technology is coal hydrogenation gasification, please refer to figure 1 , the gasifier 10 usually used for coal hydrogasification includes a furnace body 11, a pulverized coal nozzle 12, several hydrogen-containing gas nozzles 13, a crude gas outlet 14 and a semi-coke outlet 15, and the pulverized coal nozzle 12 is installed on the fur...

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Problems solved by technology

[0006] In order to overcome the above-mentioned defects in the prior art, the present invention provides a gasifier and a coal hydrogenation gasification method to solve the problem of energy waste when semi-coke is gasified again during the coal hydrogenation gasification process

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