Catalytic gasification device, system and method

Abstract

The invention relates to the technical field of catalytic gasification, in particular to a catalytic gasification device, system and method, solves the problems that energy consumption is higher and industry expanding is difficult due to the fact that high-temperature overheating gasifying agents are required to be provided when carbon monoxide and hydrogen are returned to a furnace for preparation of methane in an oxygen-free gasification process in the prior art, and overcomes the defects of low methane content, poor safety and high oxygen consumption in an oxygen introducing process. The catalytic gasification device comprises a gasification furnace, wherein the gasification furnace comprises a gas distributing plate and at least one gas incident pipe, a fluidized bed reaction zone is arranged above the gas distributing plate, and the gas distributing plate is used for introducing steam and oxygen into the area, close to the gas distributing plate, of the fluidized bed reaction zone; each gas incident pipe is communicated with the area, far away from the gas distributing plate, of the fluidized bed reaction zone and is used for introducing carbon monoxide and hydrogen into the area, away from the gas distributing plate, of the fluidized bed reaction zone. The catalytic gasification device is used for preparing methane through catalytic gasification.

Description

technical field [0001] The invention relates to the technical field of catalytic gasification, in particular to a catalytic gasification device, system and method. Background technique [0002] Coal catalytic gasification technology refers to the gasification reaction of coal and gasification agent (composed of water vapor, hydrogen and carbon monoxide) under the catalytic action of catalyst at a relatively low temperature to generate crude gas rich in methane. Compared with other coal gasification technologies, due to the simultaneous introduction of catalysts for coal catalytic gasification and methanation reactions, the endothermic coal gasification reaction and exothermic methanation reaction are coupled together, which can improve the energy efficiency of the system. [0003] In the existing coal catalytic gasification technology, the oxygen-free gasification process is mostly used. Specifically, the gasification agent composed of water vapor, hydrogen and carbon monoxi...

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a catalytic gasification device, system and method, which solves the problem that the oxygen-free gasification process in the prior art consumes a lot of energy when returning carbon monoxide and hydrogen to the furnace to produce methane, and the gasification agent needs to be overheated. Higher temperature, difficulty in industrial scale-up, and low methane content, poor safety, and high oxygen consumption in the oxygen-passing process

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