| 摘要 |
<p>Gasification process for producing crude coal gas containing CO and H2 with coal or coke as raw materials, involves following steps: 1) conveying raw materials, premixed gas and primary oxygen into a gasifier from a feeding burner at the top part of the gasifier, and performing primary combustion and gasification reaction, 2) at the same time, replenishing secondary oxygen from a secondary oxygen burner at the upper part of the gasification chamber of the gasifier to perform secondary combustion and gasification reaction, wherein the flow ratio of the primary oxygen to the secondary oxygen is 5:95 to 30:70, and 3) contacting the slag that flowing down along the gasifier wall with water to form solid slag at the bottom of the gasifier and then discharging the solid slag. Crude coal gas generated in the gasification chamber is discharged from a crude coal gas outlet at the lower part of the side wall of the gasifier. The process can optimize the axial temperature curve of the gasifier and can improve gasification efficiency.</p> |
