60万t/a煤制甲醇装置系统蒸汽平衡分析及利用  

Steam Balance Analysis and Utilization of 600000 t/a Coal-to-methanol Plant

作　　者：行政 Xing Zheng(Shaanxi Xianyang Chemical Industry Co.,Ltd.,Xianyang Shaanxi 712000,China)

机构地区：[1]陕西咸阳化学工业有限公司,陕西咸阳712000

出　　处：《煤化工》2020年第4期59-62,共4页Coal Chemical Industry

摘　　要：针对咸阳化工60万t/a煤制甲醇项目开车初期蒸汽用量紧张、系统正常运行时副产蒸汽量偏大、富余蒸汽长期放空的问题,分析了冬季和夏季全厂蒸汽平衡数据,得出了系统蒸汽不能自平衡的原因为原设计锅炉产汽量不足、副产蒸汽量过剩、空分机组达不到设计要求等。通过调整工艺、改造相关管线和设备,解决了变换系统温度偏低的问题,改造后变换废锅副产的1.3 MPa饱和蒸汽放空量由80 t/h降为40 t/h。Aiming at problems of steam consumption shortage in the initial start-up period of 600000 t/a coal-to-methanol project in Xianyang Chemical Industry Co.,Ltd.,excessive by-product steam and long-term venting of surplus steam during the normal operation of the system,the steam balance data of the whole plant in the summer and winter were analyzed.And it was concluded that the reasons that the system steam couldn′t be self-balancing were insufficient boiler steam output of the original design,excessive by-product steam,and the air separation unit unable to meet the design requirements.The problems of low temperature in the shift conversion system were solved by adjusting the process and reforming the relevant pipelines and equipment.After the transformation,the venting of by-produced 1.3 MPa saturated steam of the shift waste heat boiler was reduced from 80 t/h to 40 t/h.

关 键 词：煤制甲醇 蒸汽平衡 锅炉 空分机组 副产蒸汽 节能 

分 类 号：TK21[动力工程及工程热物理—动力机械及工程] TQ223.121[化学工程—有机化工]