天然气液化工艺中混合制冷剂配比优化分析  

Optimization Analysis of Mixed Refrigerant Ratio in Natural Gas Liquefaction Process

作　　者：王鑫 Wang Xin(Shaanxi Yanchang Petroleum and Natural Gas Co.,Ltd.,Yan'an Shaanxi 717400,China)

机构地区：[1]陕西延长石油天然气股份有限公司,陕西延安717400

出　　处：《山西化工》2024年第12期109-110,128,共3页Shanxi Chemical Industry

摘　　要：在天然气液化工艺中,系统制冷循环效率与制冷剂、换热温度两者间的匹配程度密切相关,考虑到天然气物性条件具有固定性,应合理确定制冷剂组成,进而优化制冷循环效率。混合制冷剂具有较高的重组分比例,在混合物呈现高露点温度的情况下,温度范围更广。特别基于低压条件,重组分可有效提升整个系统的换热效率,并且通过提升重组分,有利于强化制冷剂制冷能力,可降低循环量,减少设备功率消耗。但是在重组分过高的情况下,将会引发设备液击,导致设备受损。因此,应重点做好混合制冷剂组分比例控制,进而有效保障整个工艺实施效果。本文围绕天然气液化工艺进行分析,通过计算获取混合制冷剂最优配比。In the natural gas liquefaction process,the efficiency of the refrigeration cycle is closely related to the matching degree between the refrigerant and heat exchange temperature.Considering the fixed physical properties of natural gas,the refrigerant composition should be reasonably determined to optimize the refrigeration cycle efficiency.Mixed refrigerants have a higher proportion of heavy components and a wider temperature range when the mixture exhibits a high dew point temperature.Especially based on low-pressure conditions,heavy components can effectively improve the heat transfer efficiency of the entire system,and by enhancing heavy components,it is beneficial to strengthen the refrigerant cooling capacity,reduce circulation volume,and decrease equipment power consumption.However,in the case of high recombination score,it will cause equipment liquid hammer,resulting in equipment damage.Therefore,it is important to focus on controlling the proportion of mixed refrigerant components to effectively ensure the effectiveness of the entire process implementation.This article analyzes the natural gas liquefaction process and calculates the optimal ratio of mixed refrigerants.

关 键 词：天然气液化工艺 混合制冷剂 配比优化 正交设计 

分 类 号：TE974[石油与天然气工程—石油机械设备]