LNG接收站高压泵加级研究

Adding impellers of high-pressure pump in LNG terminal

为了满足不同时期LNG接收站的外输压力需求,LNG高压泵通常采用拆级设计,远期应用时通过增加叶轮的方式达到更高的外输压力,高压泵加级直接影响整个接收站的运行安全。介绍了美国EBARA生产的高压泵的结构及设备组成,详细说明了高压泵加级各阶段的施工过程;总结了高压泵加级过程中的关键技术,包括:高压泵提泵前的吹扫控制,提泵,泵盖拆解,泵运输,在高压泵车间内的拆解、检查及叶轮装配,高压泵回装及氦气检漏;强调了高压泵加级各个阶段的注意事项。研究成果对LNG接收站高压泵加级工作具有一定的指导意义。

The LNG high-pressure pump is usually designed in disassembly levels to meet the LNG terminal output pressure demand in different periods.A higher output pressure can be achieved by adding impellers in the future use.Adding impellers of high-pressure pump affects the LNG terminal safety directly.This paper introduces the structure and equipment composition of the high-pressure pump produced by EBARA in the United States,describes detailedly the construction process of adding impellers of the pump,summarizes the key techniques in the adding impeller process,including the purging control before the pump lifting,the pump lifting,the pump cover disassembly,the pump transportation,the disassembly,inspection and impeller assembly of the pump in a high-pressure pump workshop,the pump installation and helium leaking detection.It emphasizes the precautions in each step of adding impellers of the pump.The research results have a certain guiding significance for adding impellers of high-pressure pump in LNG terminal.