页岩气外输离心式压缩机运行分析与对策研究

Operation Analysis and Countermeasure Research on Centrifugal Compressor for Shale Gas Export

国内某气田公司已投运3座大功率离心式压气站用于满足页岩气外输需求。在运行的过程中A压气站和B压气站关联度高,仅凭操作人员的经验调节,不能够实现压气站的联动优化,达到降本增效的目的。针对A压气站与B压气站存在的单双机运行选择、单机气量调配、两站联合运行等问题开展了计算与分析,得出了以下结果:A压气站在总气量超过1400×10^(4)m^(3)/d和处于700×10^(4)m^(3)/d左右时,应对单台机组运行的经济性进行优化分析;为提高A压气站机组效率,可采用提高压比的方法来实现降低功率消耗;为避免B压气站开启小循环运行,可采用增加A压气站处理量的方式。

Three centrifugal compressor stations with high power for the needs of shale gas export in a domestic gas field company has put into operation.The compressor station A and the compressor station B are highly correlated during the operation.The linkage optimization of the compressor station cannot be realized and the purpose of reducing cost and increasing efficiency cannot be achieved only based on the operator′s experience.Aiming at the problems of single and double operation selection,single gas volume allocation,and two-station joint operation existing in A compressor station and B compressor station,calculation and analysis are carried.The result shows that the economical analysis of the single unit operation should be optimized when the total gas volume of compressor station A exceeds 1400×10^(4) m^(3)/d and is about 700×10^(4) m^(3)/d.The method of increasing the pressure ratio can be used to reduce power consumption and improve the unit efficiency of compressor station A,and the method of increasing the processing capacity of compressor station A can be adopted to avoid the small cycle operation of compressor station B.