摘要
山东LNG接收站建设了国内首套LNG轻烃回收装置,装置投产过程中发现轻烃LNG产品外输泵外输不顺畅,外输流量达不到设计要求,若该问题不能解决,则可能导致装置无法投产。通过设计参数对比分析与现场测试,认为是由于工艺区高压外输泵与LNG产品外输泵出口存在压力差所导致。对该问题提出三种解决方案:增加轻烃外输泵叶轮级数;在工艺区每台高压泵出口增设1台调节阀;对现有工艺总管进行改造,将两类泵出口管道分开独立设计。通过计算对比分析,认为轻烃外输泵增加两级叶轮的方案是短期最有效的解决方案,但从长远角度考虑,建议在项目二期建设时每台高压外输泵出口增设1台可以从DCS控制调节的截止阀。
The first set of domestic LNG light hydrocarbon recovery unit has been built in Shandong LNG terminal, however it is found that transmission of LNG products was not carried out smoothly in the process of commissioning, and the send-out capacity could not meet the design requirements. If this problem cannot be solved, it may cause commissioning failure. By the contrastive analysis of design parameters and operation experiment, it is believed that the problem is caused by the export pressure difference between the high pressure pumps of process area and LNG product pump. In order to solve this problem, three kinds of solutions have been proposed. First, increase impeller series of light hydrocarbon pumps. Second, add a control valve on each high-pressure pump outlet pipeline in processing area. Third, reform the existing process header and separate the two kinds of pump outlet piping. By calculating and contrasting analysis, it is believed that adding two impeller is the most effective solution for short term. However, for long term consideration, at the time of phase II project, it is recommended that a globe valve can be added on each high pressure pump's outlet pipe which is controlled from DCS.
出处
《天然气与石油》
2016年第5期1-5,共5页
Natural Gas and Oil
基金
中国石油化工股份有限公司山东LNG资助项目(702081F 0000)
关键词
LNG接收站
轻烃回收
外输泵
压差
投产
LNG terminal
Light hydrocarbon recovery
Sent-out pump
Pressure difference
Commissioning
