关键词: 两段式气化工艺；FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">碳转化率；煤气热值

Abstract:

A new two stage combined gasification process was proposed by the Institute of Clean Coal Technology, East China University of Science and Technology, which is of high-performance in reducing carbon dioxide emissions and can make the use of recycling sensible heat to make up the heat recovery deficiency of nowadays’ entrained gasification process. The effect of coal mass adding to the second stage and the gas compositions from the first stage on the heat value of the second stage’s outlet coal gas, the concentration of H₂  and CO, the carbon conversion and the conversion of H₂O and CO₂ in the second gasification stage were examinated at hot-state in a two stage combined coal gasifier. The experiment results showed that this two stage gasification technology could utilize the sensible heat sufficiently and improved heat value of outlet coal gas. The optimized coal mass adding to the second stage was 1400g，which was 10% of the first stage’s coal mass. The excessive adding would result in tar formation and reducing reaction temperature of the coal layer in the second stage. The efficiency of recovery heat became more obvious with the increase of H₂O and CO₂ concentration in the first stage. Furthermore, it made great contribution to the environment with reducing carbon dioxide emissions.

Key words: 两段式气化工艺；FONT-FAMILY: 宋体, mso-bidi-font-size: 12.0pt, mso-ascii-font-family: Times New Roman, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">碳转化率；煤气热值