摘要
对于采用混合冷剂制冷的液化天然气(LNG)装置,当环境温度变化时通过装置运行的优化操作,可以有效起到节能的效果。文中将设备变工况运行的模拟计算与基于HYSYS软件的工艺计算相结合,建立了单混合制冷剂循环(SMR)天然气液化装置的运行优化模型。优化运算的目标函数为运行能耗最低,寻优变量包括冷剂的摩尔流量和组分,采用Box算法进行求解。针对典型算例进行了环境温度变化时SMR装置的运行优化研究。优化结果表明:当环境温度降低时,运行优化可以有效降低SMR装置的能耗,但仍高于设计优化的结果。给出了运行优化后的工艺参数和冷剂组分,并与设计优化的结果进行了比较,一般运行优化所得冷剂摩尔流量较大,但是冷剂组分更轻。
The optimization operation of Single Mixed Refrigerant （SMR）plant can increase its energy consumption under changed ambient temperature.An operation optimization model of SMR plant was developed by combination of devices calculations using fitting method and process simulation using HYSYS software.The optimized variables are the molar flow and the composition of MR （Mixed Refrigerant）and the object function is to minimize the energy consumption.The Box method was used to solve the optimization problem.The operation optimization was carried out for a typical SMR process under variable ambient temperature.The results show that the operation optimization can reduce the energy consumption though the energy consumption for operation optimization is still higher than that for design optimization.The optimized process parameters and MR composition were given and compared with that for design optimization.The mole flow of MR is larger than that for design optimization while lighter MR should be utilized in operation optimization.
出处
《化学工程》
CAS
CSCD
北大核心
2014年第3期75-78,共4页
Chemical Engineering(China)
基金
国家自然科学基金青年科学基金项目(51004111)
中国石油大学(北京)科研基金资助项目(2462012KYJJ0407)
关键词
LNG
SMR
运行优化
冷剂组分
LNG
SMR
LNG
SMR
operation optimization
MR composition
