PROCESS AND EQUIPMENT FOR COAL GASIFICATION, AND POWER GENERATION SYSTEM AND POWER GENERATION PROCESS THEREOF

摘要

A coal gasification process is provided based on the grading conversion of carbon hydrogen components of coal, wherein the coal gasification process comprises a carbonization process, a carbon monoxide-producing process and a shift reaction process. By blending the coke-oven gas, carbon monoxide and hydrogen produced in the above processes in different ratios, coal gasification syngases with various carbon hydrogen ratios can be obtained. Further, the coal gasification process does not need pure oxygen to take part in the reactions, and has several advantages, such as high gasification efficiency, low equipment investment costs, less limitation on the types of coal and flexible adjustment of the gasification products.

主权项

1. A coal gasification process by a grading conversion of carbon hydrogen components of the coal, comprising the steps of: a carbonization process, a monoxide-producing process and a shift reaction process, wherein
the carbonization process carbonizes the gasifying coal to produce a product comprising crude coke, coke-oven gas and tar; the carbon monoxide-producing process subjects the crude coke produced in the carbonization process to react with carbon dioxide to produce carbon monoxide, and the heat needed is also supplied by the heat from the combustion of the heat-supplying coal and high-temperature air; the shift reaction process subjects a part of carbon monoxide produced in the carbon monoxide-producing process and water vapor to a conversion reaction to produce carbon dioxide and hydrogen, and the separation by using a separation device is performed to obtain carbon dioxide and pure hydrogen; the coke-oven gas, carbon monoxide and hydrogen produced in the above processes are blended in different ratios, so that coal gasification syngases having different carbon hydrogen ratios can be obtained.