摘要
采用HYSYS软件,建立丙烷一级、二级和三级预冷的液化天然气工艺模拟流程。对相同操作条件的原料天然气,在冷量功耗相同条件下,丙烷预冷级数越多,节能效果越好,但效果逐渐减缓,而流程的复杂程度、设备数量增加较快。利用带三级丙烷预冷的混合制冷剂液化天然气流程,对原料天然气进行液化。通过对混合制冷剂组分配比等参数进行优化,得到流程的最小比功耗是6.717 kW·h/kmol。液化2 000 kmol/h的原料气,仅需3 827 kmol/h混合制冷剂,达到了工况优化和节能的目的。
Using HYSYS software,simulation processes of liquefied natural gas（LNG） were established with propane single stage,two stages and three stages pre-cooled system,respectively.For the raw material in same operation condition, the larger number of stages of propane pre-cooled,the better energy-saving effect was obtained in the case of the same cooling power cost.But the energy-saving effectiveness declined gradually.Multistage cycles made the process configuration complex and the quantity of equipments increased a lot.Liquefied natural gas process with propane three stages pre-cooled system mixed refrigerant cycle（MRC） is choosed for the liquefication of the raw material. Through process optimization such as regulating the composition of MRC, the minimum specific power consumption 6.717 k W·h/kmol was obtained. At this time, only 3 827 kmol/h mixed refrigerants were cost to liquefy 2 000 kmol/h raw gas, and achieving the goal of operaration condition optimization and energy conservation.
出处
《石油化工应用》
CAS
2016年第3期151-155,共5页
Petrochemical Industry Application
关键词
丙烷预冷
混合制冷剂
液化天然气
工艺优化
HYSYS软件
propane pre-cooled system
mixed refrigerants
liquefied natural gas
process optimization
HYSYS software
