摘要
针对海上浮式LNG工艺技术对装置紧凑性、操作简便性、制冷剂安全性的要求,采用HYSYS软件对以CO2为预冷剂,空气为制冷剂的新型膨胀式液化流程进行模拟分析,同时在Peng-Robinson方程的基础上,综合考虑了气体制冷剂膨胀前压力、原料气温度、CO2节流后温度和LNG存储压力四个重要参数对液化工艺的影响并对其进行了优化改进。结果表明:与传统的丙烷预冷氮膨胀流程和双氮膨胀液化流程相比较,该方法受船体晃动的影响低,海上安全性高、稳定性好,液化率可达到91%,更适用于海况恶劣的环境。
For meeting the requirements of offshore floating LNG technology with compact device, easy operation, refrigerant safety ere, this article carried on the simulation and analysis of a new type process of air expander liquefaction using HYSYS software based on Peng - Robinson equation. The process adopted air as main refrigerant combined with CO2 precooling cycle, and comprehensively took the four parameters effects on process performance into consideration for the optimization, that were the pressure before refrigerant gas expansion, feed temperature, the temperature after CO2 throttling and LNG storage pressure. The results show that compared with the traditional nitrogen expansion process with propane precooling and double nitrogen expanders liquefaction process, the new method is more suitable for the sea condition for its good anti - shaking, high safety, perfect stability and acceptable liquefaction rate which can reach 91%.
出处
《低温与超导》
CAS
北大核心
2014年第7期19-24,74,共7页
Cryogenics and Superconductivity
基金
黄慧贞集美大学学科建设基金(ZC2012015)
福建省教育厅A类科技项目(JA12191)
国家安全监管总局科技项目(201310180001)资助
