燃气锅炉掺烧甲醇弛放气的生产应用

Productive Application for Mix-firing Methanol Releasing Gas in Combustion Gas Boiler

山西焦化股份有限公司24万t/a甲醇装置采用焦炉煤气为原料生产时,产生的15 000 m3/甲醇弛放气除用于转化预热炉及吹风气锅炉的燃料外,还富余9 000 m3/h,为此实施了燃气锅炉掺烧甲醇弛放气的节能技术改造。分析了燃气锅炉掺烧甲醇弛放气的可行性;选择了弛放气的引出位置、输送方式和掺烧比例。实施效果表明:掺烧甲醇弛放气可产蒸汽22 t/h,发电4 400 kW.h,按年运行8 000 h计,经济效益可达360万元/a。

In case of using coke-oven gas as productive raw material in methanol plant with a capacity of 240 000 t/a in the Shanxi Coking Stock Com- pany Ltd. , there was also released gas 9 000 m3/h remained from 15 000 m3/h of methanol released gas totally produced, excluding for using as fuel of preheating furnace of reformation and air blowing gas boiler, therefore energy conservation technology reformation was executed for mix-firing the methanol releasing gas in the combustion gas boiler. Author has analyzed the feasibility for mix-firing the methanol releasing gas in the combustion gas boiler; has selected the outlet location, conveying mode and mix-firing proportion for the releasing gas. Executed effect indicates that mix-firing releasing gas can pro- duce 22 t/h of steam, 4 400 kW ~ h of electric power, as per operating hours being 8 000 h, economic benefit can reach to 3.6milion Yuan RMB per year.