Omnibearing coproduction system and method by utilizing coal grading

Abstract

The invention provides an omnibearing coproduction system and method by utilizing coal grading. A standby coal system is respectively connected with a lump coal pyrolysis system and a pea coal pyrolysis system; a gasification system uses air as an input, semicoke generated by the pea coal pyrolysis system as a raw material, and generated gasified coal gas as a heat carrier of the lump coal pyrolysis system; lump coal pyrolysis oil gas generated by the lump coal pyrolysis system is used as a heat carrier of the pea coal pyrolysis system, part of generated lump coke is output as metallurgical coke, and the rest lump coke is used as a raw material for preparing carbide; pyrolysis coal gas generated by the pea coal pyrolysis system enters a crude gas treatment system, generated pyrolysis tar is used for hydrogenation grading, and generated semicoke is respectively used as semicoke for power generation and semicoke for gasification; and the crude gas treatment system uses pyrolysis coal gas generated by the pea coal pyrolysis system as a raw material, generated recovery waste heat is applied to a waste heat boiler of a power generation system, and generated carbon dioxide enters a carbon dioxide displaced coal gas system.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to the field of realizing polygeneration of oil, gas, chemical industry and electricity by using full particle size coal as raw material. Background technique [0002] China is the world's largest coal producer and consumer. From the perspective of my country's energy resources and economic development level, coal will still be the most important energy source in my country for a long time. Besides, there are a series of pollution problems. [0003] Compared with other coal combustion power generation, coal liquefaction, coal gasification and gasification downstream, the separation and clean conversion technology led by pyrolysis technology has obvious advantages in terms of investment intensity, technical economy, and energy conversion efficiency. , is the best way to comprehensively utilize coal. At present, the efficient and clean pyrolysis process of coal is divi...

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Problems solved by technology

[0006] In order to solve the problems of low coal utilization rate, poor adjustability of single coal gasification or coal pyrolysis gas head polygeneration, weak applicability of coal types in specific pyrolysis system and unsatisfactory high temperature separation of oil and gas in pulverized coal pyrolysis, the present invention provides A system and method for all-round coal quality separation and utilization polygeneration

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