Coal pyrolysis reactor-circulating fluidized bed combined system and method for treating coal using it

Abstract

The invention provides a coal pyrolysis reactor-circulating fluidized bed combined system and a method for treating coal by utilizing the same.The combined system comprises a coal pyrolysis reactor and a circulating fluidized bed.The combined system enables the coal pyrolysis reactor and the existing circulating fluidized bed to be directly combined for usage without transformation of the existing circulating fluidized bed, the coal pyrolysis reactor and the circulating fluidized bed can relatively and independently operate, and mutual interference is relatively smaller.The combined system can be effectively used for producing combustible gas and pyrolysis oil and co-produces electric power, utilizes a conveying system of the existing circulating fluidized bed to achieve semi-coke hot conveying and ensure semi-coke combustion and reduces the cost of a coal topping process.In addition, a cyclone separator is built in the coal pyrolysis reactor so that the dust content of an oil-gas mixture of the coal pyrolysis reactor can be greatly reduced, further the pipeline blacking possibility in a follow-up process is effectively reduced, and heat preservation facilities are decreased.

Description

technical field [0001] The invention relates to the technical field of step-by-step utilization of coal, in particular to a coal pyrolysis reactor-circulating fluidized bed combined system and a method for treating coal by using the same. Background technique [0002] The semi-coke produced after coal pyrolysis can be used as fuel to generate electricity. However, the existing coal pyrolysis topping process is mainly aimed at circulating fluidized bed power generation units. As a heat carrier, it realizes the pyrolysis of coal and recovers oil and gas by using the down-bed process. Because the existing system adopts a relatively complicated coal pyrolysis head-up process of solid or gas heat carrier, and the coal pyrolysis process produces oil and gas resources, for the power generation system, it is necessary to be equipped with a corresponding oil and gas treatment system, so the existing system configuration is various , the cost is high. [0003] figure 1 It is a stru...

AI Technical Summary

Problems solved by technology

The combined system of the present invention solves the problem of complex pyrolysis process in the front stage of coal topping, and the pyrolysis products are rationally utilized to reduce power generation costs

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