A device and method for preparing coal tar and coal gas by coupling down-flow pyrolysis and up-flow gasification

Abstract

The invention discloses a device and method for preparing coal tar and gas through coupling of down-flow pyrolysis and up-flow gasification and belongs to the technical field of chemical engineering of carbon-containing materials. Particularly, a mixed gas inlet of a down-flow pyrolysis reactor is connected to high-temperature gas output from an up-flow gasification reactor, so that heat in a gasification reaction product can be effectively applied to pyrolysis reaction, and meanwhile, the procedure step of cooling the high-temperature gas as the gasification reaction product is also avoided; one part of high-temperature carbon-containing material in a pyrolysis reaction product is fed into the gasification reactor through a material return outlet for participating in gasification reaction as a gasification raw material, and the heat required for the gasification reaction can be provided to reduce oxygen consumption in the gasification process; and the gasification reaction is coupled to the pyrolysis reaction, and the product subjected to gasification and pyrolysis reaction is filtered and dedusted, so that the dedusting frequency is reduced, the energy after the gasification and the pyrolysis reaction is reasonably utilized, the overall energy consumption of the device is reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of carbonaceous materials chemical industry, and in particular relates to a device and method for preparing coal tar and coal gas by coupling down-flow pyrolysis and up-flow gasification. Background technique [0002] Carbon-containing materials can produce coal tar and gas after pyrolysis reaction. Pyrolysis processing of carbon-containing materials is an important way to classify carbon-containing materials and use them efficiently and cleanly. [0003] The specific process of pyrolysis is to heat the carbon-containing material under the condition of isolating the air. The carbon-containing material undergoes a series of complex processes of physical changes and chemical reactions at different temperatures. The process of pyrolyzing the carbon-containing material requires The outside world provides a lot of heat, and the pyrolysis products of carbonaceous materials will also produce a large amount of high-...

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Problems solved by technology

[0006] The embodiment of the present invention provides a device and method for preparing coal tar and gas by coupling pyrolysis and gasification of carbon-containing materials, which can solve the problems of complex system, high energy consumption and high cost in the preparation process of coal tar and gas

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