CAJ | 학술논문

LNG接收站通常采用海水作为气化LNG的热媒，但实际运行中，却存在海洋微生物滋生、附着管道及设备的风险。因此，LNG接收站通常会在海水取水口处投加次氯酸钠（NaClO），但Na‐ClO投加量及产生装置却是其必须考虑的问题。首先，分析了投加量的影响因素及评价标准，并以大连LNG接收站为例说明投加量的具体确定方法；其次，分析了电解海水制NaClO 装置及NaClO 溶液直接投加装置，并计算了二者的运行成本；最后，就两种装置的优劣进行对比分析。结果显示，电解海水制NaClO装置具有运行成本低、NaClO即产即用的优点；而NaClO溶液直接投加装置则具有前期投资费用低、装置简单和建造面积小的优点。
LNG접수참통상채용해수작위기화LNG적열매，단실제운행중，각존재해양미생물자생、부착관도급설비적풍험。인차，LNG접수참통상회재해수취수구처투가차록산납（NaClO），단Na‐ClO투가량급산생장치각시기필수고필적문제。수선，분석료투가량적영향인소급평개표준，병이대련LNG접수참위례설명투가량적구체학정방법；기차，분석료전해해수제NaClO 장치급NaClO 용액직접투가장치，병계산료이자적운행성본；최후，취량충장치적우렬진행대비분석。결과현시，전해해수제NaClO장치구유운행성본저、NaClO즉산즉용적우점；이NaClO용액직접투가장치칙구유전기투자비용저、장치간단화건조면적소적우점。
LNG terminals usually use seawater as heat medium to gasify LNG .But in the actual operation ,there are risks that marine microbes multiply and adhere to pipes and units .Therefore , LNG terminals usually add sodium hypochlorite at the seawater intake ,but the dosage and generation units are questions needed to be answered .Firstly ,the factors affecting the dosage and its evaluation criteria were analyzed and the dosage determination process was illustrated with Dalian LNG Terminal as a case study .Then ,two types of generation units ,seawater electrolysis system and sodium hypo‐chlorite solution direct dosing system ,were introduced and each running cost was calculated respec‐tively .Finally ,the advantages and disadvantages of the two systems were analyzed .From the com‐parison ,seawater electrolysis system had the benefits of lower running costs and could be used imme‐diately after production ;on the other hand ,sodium hypochlorite solution direct dosing system had the advantages of lower front‐end costs ,more simple device ,and less footprint .