LNG接收站海水生物预处理方案比选  

Comparison of Biological Pretreatment Programs for Seawater in LNG Receiving Terminal

作　　者：马超群 周玉香 郭艳丽 MA Chaoqun;ZHOU Yuxiang;GUO Yanli(CNOOC Petrochemical Engineering Co.,Ltd.,Shandong Jinan 250000,China)

机构地区：[1]中海油石化工程有限公司,山东济南250000

出　　处：《广州化工》2025年第7期189-192,共4页GuangZhou Chemical Industry

摘　　要：LNG接收站采用海水作为气化热源时,取用海水过程需要对海水进行预处理,防止海水生物附着于管道及设备,影响接收站的正常运行。目前国内常用的两种海水生物预处理方案为投加杀生缓释剂EGD和电解海水制氯。本文分别简述了两种方案的工作原理及工艺流程,并从处理效果、产污情况、安全风险与环境风险、投资等方面对两种方案进行分析比较,根据不同使用场景,推荐合适的海水生物预处理方案。通过比较,长期使用电解海水制氯方案容易使生物产生抗药性,也存在余氯超标风险;直接投加EGD杀生剂所需要的设备少,检修维护方便,产污少,投资少。本文为后续项目进行海水生物预处理方案比选提供参考。When LNG receiving stations use seawater as the heat source for gasification,seawater intake requires pretreatment to prevent marine organisms from attaching to pipelines and equipment,which could disrupt normal station operations.Currently,the two most commonly used seawater biological pretreatment methods in China are the addition of slow-release biocidal formulation EGD and electrolytic seawater chlorination.The working principles and process flows of both methods were introduced,and then compared and analyzed in terms of treatment efficiency,pollution generation,safety risks,environmental impacts and investment costs,and appropriate pretreatment methods based on different application scenarios were recommended.Comparative analysis revealed that prolonged use of electrolytic seawater chlorination may lead to biofilm resistance and risks of residual chlorine exceeding regulatory limits.In contrast,direct injection of EGD biocides offered advantages such as simpler equipment requirements,easier maintenance,lower pollution generation and reduceing investment.This study provided a reference for future projects to conduct comparative analysis of seawater biological pretreatment methods.

关 键 词：海水生物预处理 EGD 电解海水制氯 方案比选 LNG接收站 

分 类 号：TE89[石油与天然气工程—油气储运工程]