SYSTEM AND METHOD FOR CO-SUPPLY AND CO-PRODUCTION IN COAL GASIFICATION AND COAL COKING

摘要

Disclosed are a system and method for co-supply and co-production in coal gasification and coal coking. The method comprises the following steps: a part of raw material coal undergoes a coal gasification process to prepare a crude synthesis gas of coal gasification, which is cooled, transformed and purified to obtain a clean synthesis gas of coal gasification and carbon dioxide, and the clean synthesis gas of coal gasification undergoes a chemical synthesis to prepare a chemical product; and the other part of the raw material coal is coked to obtain coke and a crude coke-oven gas, a part of the obtained coke is reacted with the carbon dioxide obtained in the coal gasification process to prepare carbon monoxide, the obtained crude coke-oven gas is purified to obtain a clean coke-oven gas, and then the carbon monoxide is mixed with the clean coke-oven gas according to a ratio to prepare a synthesis gas of coal coking, which undergoes a chemical synthesis to prepare a chemical product. In the present invention, the co-supply method of recovering and conveying CO₂ produced in the coal gasification process to the coal coking process to produce the synthesis gas effectively improves the utilization efficiency of coal while saving energy and reducing emission.