100
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
LNG接收站海水泵及高压泵变频节能探究
李鑫陈帅2
1.新疆华隆油田科技般份有限公司2.中石油大连液化天然气有限公司
2016
摘要国内LNG接收站通常采用一台海水泵额定流量运转为一台开架式气化器（ORV)提供海
水的模式气化LNG，非冬季运行，由于海水温度较高、外输天然气流量较小，ORV所需海水流量小于海水泵额定流量。所以，此运行模式普遍存在能耗过剩。同时，由于外输天然气压力调节范国较大，而高压泵只能提供其额定出口压力。因此，当外输天然气压力较小时，高压泵出口压力过剩，导致能耗过剩。为了解决海水泵、高压泵能耗过剩问题，开展了对其变频节能的探究。首先，分析了海水泵、高压泵变频的必要性：然后，以海水泵为例，以其特性曲线为基础，计算了海水泵工频出口压力及电机功率，再运用二分法及泵相似理论计算了海水泵变频电机功率；之后对海水泵及高压泵工频计算进行了误差分析，最大相对误差为3.5%；最后，通过能耗对比发现：海水泵采用变频，每年可节省电能39.41%；高压泵采用变频，每年可节省电能47.39%；采用海水泵、高压泵变频，接收站每年可节省经济成本约426万元。
关键词LNG接收站海水泵开架式气化器能耗过剩高压泵变频节能
中图分类号：TE89
文献标志码：A
DOI:10.3969/j.issn.1007-3426.2016.05.022
and high-pressure pump in LNG terminal
LiXin'，ChenShuai
(l. Xinjiang Hualong Oilfield Technology Company Limited, Karamay 834000, China)(2 . PetroChina Dalian Liguefied Natural Gas Company Limited, Dalian l16600, China)
Abstract: Domestic LNG terminals usually use the model that a seawater pump with rated flow operation provides seawater for a single open rack vaporizer (ORV) to gasify LNG. Due to higher seawater temperature and lower natural gas flow of external input , the required seawater flow of ORV is less than the rated flow of seawater pump during non-winter operation. Therefore, this operation model is associated with excess energy consumption . Meanwhile , since the pressure range of natural gas pressure of external input is wide and the high-pressure pump can only provide the rated outlet pressure, so the outlet pressure of the high-pressure pump will be excessive when the pressure of natural gas of external input is lower, and resulting in excess energy. In order to solve the excess energy consumption problem of seawater pump and high-pressure pump, this paper started to explore its frequency energy-saving . Firstly , necessity of seawater pump and high-pressure pump frequency was analyzed. Secondly, in seawater pump, for example, outlet pressure and motor power of power frequency was calculated based on its characteristic curve. Then motor power of variable frequency
作者简介：李鑫（1983一），女，双硕士研究生，助理工程师，毕业于澳大利亚卧龙岗大学，现就职于新疆华隆油田科技股份有限公司，主要从事生产管理、油田开发工艺、数字油田及液化天然气等相关领域工程技术研究。E-mail;hanhan_417@163.com
6 LNG接收绍逻警数管理工作。E-mail.643369923@qq-com