煤化工生产中能源循环梯级利用和“三废”处理的探索与实践

Exploration and practice on energy recycling utilization and “three wastes” treatment in coal chemical production

通过开发甲醇弛放气置换焦炉煤气、弛放气变压吸附制氢精制苯、甲醇空分富余氮气应用干熄焦发电、废水分级处理、蒸汽调配梯级利用、废渣应用配煤系统等技术,建立了节能高效的余热循环、氮气循环、弛放气循环、水循环、废渣回收、产品循环等"六大循环系统",实现了煤化工生产过程中"三废"零排放和能源高效梯级利用。

By developing technologies such as methanol purge gas displacing coke oven gas, PSA for benzene refining from methanol purge gas, surplus nitrogen using in CDQ, waste water graded treatment, cascade utilization of steam,waste residue using in coal blending system,the energy saving and efficient ＂six recycling systems＂（ waste heat, nitrogen,purge gas, industry water, waste residue, product） are set up. ＂Three wastes＂ zero emission and efficient utilization of energy in coal chemical production are implemented.