Comprehensive utilization method of coal-based oil residue

Abstract

The invention relates to a comprehensive utilization method of a coal-based oil residue. According to the method, a heated solid heat carrier is mixed with the coal-based oil residue by using a solid heat carrier method; the oil residue is heated and gasified and partially pyrolyzed by using sensible heat of high-temperature solids; heavy liquefied oil in the coal-based oil residue is recovered after being pyrolyzed and gasified; the residual un-gasified residue enters a hot blast heater of a circulating fluidized bed to fully burn; one part of heat generated by combustion is used for heating the solid heat carrier; the other part of heat is recovered through a waste heat boiler. The comprehensive utilization method is small in investment, easy to implement, and high in overall efficiency.

Description

technical field

[0001] The invention relates to the technical field of utilization of coal-based oil residue, in particular to a comprehensive utilization method of coal-based oil residue. Background technique

[0002] The treatment of coal oil residue and tar residue is a worldwide technical problem. The direct liquefaction project of China Shenhua Coal-to-Liquid Chemical Co., Ltd. Ordos Coal-to-Liquid Branch Company produces tens of thousands of tons of by-product oil residue every year, which can only be treated by boiler co-firing at present. The main components of coal-based oil residue are heavy liquefied oil, bituminous substances, and unconverted coal. Among them, the content of heavy liquefied oil and asphalt accounts for about 50% of the oil residue, and the coal-based oil residue is burned by the boiler A large amount of expensive and useful components such as heavy liquefied oil and asphalt is a last resort.

[0003] The development of coal-based oil residue co...

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