二元制冷及脱甲烷塔系统存在的问题及对策  

PROBLEMS IN BINARY REFRIGERATION SYSTEM AND DEMETHANIZER SYSTEM AND THE OPTIMIZATION MEASURES

作　　者：李洋洋[1] 

机构地区：[1]中沙(天津)石化有限公司,天津300271

出　　处：《乙烯工业》2016年第4期12-16,共5页Ethylene Industry

摘　　要：中沙乙烯装置投产开车初期，二元制冷压缩机组运行功率一直偏大（约8700kW），且一段吸入罐的液体加热汽化线阀门有15％-25％开度；与此同时低压脱甲烷塔的塔顶高压甲烷中乙烯含量（摩尔分数）高达0．5％，通过研究分析，采取增加二元冷剂甲烷配比到43％、提高机组转速到7410r／min等措施，彻底解决了二元制冷压缩机系统存在的问题，并降低压缩机功耗4．6％；采用调整前冷操作参数，适当降低塔的操作压力等措施，脱甲烷塔塔顶高压甲烷中的乙烯损失（摩尔分数）降低到0．12％～0．15％。取得了较好的效果。At the beginning of the operation of the ethylene plant at SINOPEC SABIC Tianjin Petrochemical Co.,Ltd.,the operating power of the binary refrigeration compressor units was very high( about 8,700 kW),the valve opening on the vaporization line of the first stage suction tank was 15% to 25%,and the ethylene content of the overhead high pressure methane from low pressure demethanizer was as high as 0. 5%( mol). Based on researches and analysis,some measures such as increasing the proportion of methane in binary refrigerant to 43%( mol) and raising the speed of GB-651 to 7,410 r / min were taken to completely solve the problems in binary refrigeration system and reduce the power consumption of compressor by 4. 6%. Through adjusting the operating parameters of charge gas chilling system and decreasing the operating pressure of the tower,the ethylene loss in HP CH4 from the demethanizer was reduced to 0. 12% ~ 0. 15%( mol).

关 键 词：二元制冷 功率消耗 低压脱甲烷塔 乙烯损失 操作优化 

分 类 号：TQ221.211[化学工程—有机化工]