Coal poly-generation efficient and pyrolysis-gasification series system and pyrolysis gasification method

Abstract

The invention discloses a coal poly-generation efficient and pyrolysis-gasification series system which comprises a coal blending device, a coke oven, a coke transfer device, a coke lifting device, a block coal gasification reactor, a waste heat boiler, a gasification gas purification device and a gas reforming device which are connected in sequence. The coke oven is further connected with the inlet end of the pyrolysis gas purification device. The outlet end of the pyrolysis gas purification device is connected with the gas reforming device. The gasification gas purification device is further connected with a remelted coal gas cabinet. The coke oven and the block coal gasification reactor obtain oxygen by being connected with an air separation device. The system and method are advanced, efficient and environmentally friendly, can treat low-rank coal, can treat three-high coking coal, solves the problem that the dust content in pyrolysis tar in the prior art is large, ensures that the pyrolysis coal gas and gasified coal gas are independent, achieves internal technology coupling of a technological system to the maximum extent, improves the integral efficiency of the system, and meanwhile can treat inferior coal and three-high coking coal.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis and gasification, and in particular relates to a coal polygeneration efficient pyrolysis-gasification series system and a pyrolysis gasification method. Background technique [0002] Coal is the basic guarantee for the sustained and rapid development of China's economy. China's energy conditions of "rich in coal, short of oil, and low in gas" determine that the dominant position of coal in the energy structure will not change for a long time in the future. However, in recent years, with the decline of the economic situation, the country has implemented supply-side reforms in excess industries, and the steel and coal industry is facing the development pressure brought about by the reduction of production capacity. Transformation and upgrading have become an important driving force for the sustainable development of enterprises. In the face of excess coal production, low-quality coal types a...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a high-efficiency pyrolysis-gasification series system and pyrolysis-gasification method for polygeneration of coal. The system and method are advanced, efficient, and environmentally friendly, and can handle low-rank coal and three-high coking Coal, which solves the problem of high dust content in pyrolysis tar in the prior art, ensures that pyrolysis gas and gasification gas are independent of each other, realizes the internal technology coupling of the process system to the greatest extent, improves the overall efficiency of the system, and can process low-quality coal and "Three high" coking coal

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