Gasification furnace for cooperatively producing methane and light tar

Abstract

The invention provides a gasification furnace for cooperatively producing methane and light tar, and belongs to the field of catalytic coal gasification. Under the precondition of guaranteeing the methane yield, the conversion rate and pyrolysis degree of carbon raw material can be improved, and thus the yield of tar, especially light tar, is improved. The gasification furnace comprises a pyrolysis section and a gasification section positioned below the pyrolysis section, wherein the diameter of the pyrolysis section is greater than that of the gasification section; the upper part of the gasification section is embedded in the bottom of the pyrolysis section, and is connected to the inner wall of the pyrolysis section through an inverted cone-shaped pyrolysis section distribution plate; a pyrolysis section air chamber is restricted by the upper part of the gasification section, the inverted cone-shaped pyrolysis section distribution plate and the inner wall of the bottom of the pyrolysis section. The gasification furnace can be used in the gasification technology for cooperatively producing methane and light tar.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification, in particular to a gasifier for co-producing methane and light tar. Background technique [0002] Coal catalytic gasification technology is an important way of clean and efficient utilization of coal. Existing coal catalytic gasifiers include one-stage bed gasifiers, two-stage bed gasifiers and three-stage bed gasifiers. In the above-mentioned gasifiers, catalyst-loaded carbonaceous raw materials are usually used as raw materials. After the carbonaceous raw materials are upgraded in the pyrolysis section in the gasification furnace, they will be mixed with the gasification agent at a certain pressure and temperature in the gasification section. Under the action of the catalyst, the catalytic gasification reaction is carried out to obtain coal tar with high economic value while generating high-concentration methane. [0003] However, in actual production, the design of the pyrolysis se...

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Problems solved by technology

[0003] However, in actual production, the design of the pyrolysis section in the existing gasification furnace does not make full use of the characteristics of catalytic gasification and pyrolysis, so that the carbonaceous raw materials are not in effective contact with the gasification agent in the pyrolysis section, thereby reducing the The conversion rate and pyrolysis degree of carbonaceous raw materials are reduced, resulting in insufficient pyrolysis reaction, resulting in low yield of coal tar, especially light tar with high economic added value.

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