公开(公告)号：US06637237B1

公开(公告)日：2003-10-28

申请号：US10121151

申请日：2002-04-11

申请人： Vitus Tuan Wei ,  Qi Ma ,  James Tzong-Chaur Wu

发明人： Vitus Tuan Wei ,  Qi Ma ,  James Tzong-Chaur Wu

IPC分类号： F25J100

CPC分类号： F25J3/0238 ,  F25J3/0219 ,  F25J3/0233 ,  F25J3/0252 ,  F25J3/0655 ,  F25J2205/04 ,  F25J2210/12 ,  F25J2215/60 ,  F25J2215/62 ,  F25J2270/12 ,  F25J2270/18 ,  F25J2270/66 ,  F25J2270/902

摘要： The refrigeration system for an ethylene plant comprises a closed loop tertiary refrigerant system containing methane, ethylene and propylene. The tertiary refrigerant from a compressor is separated into an inter-stage discharge and the final compressor discharge to produce a methane-rich vapor fraction and two levels of propylene-rich liquids so as to provide various temperatures and levels of refrigeration in various heat exchange stages while maintaining a nearly constant refrigerant composition flowing back to the compressor and with the bulk of the total return refrigerant flow going to the first stage compressor section. This tertiary system can also be applied to an ethylene plant with a high pressure demethanizer.

摘要翻译： 用于乙烯装置的制冷系统包括含有甲烷，乙烯和丙烯的闭环三级制冷剂系统。 来自压缩机的三级制冷剂被分离成级间排放，并且最终压缩机排出以产生富含甲烷的蒸气馏分和两级富含丙烯的液体，以便在各种热交换阶段中提供各种温度和水平的制冷 同时保持几乎恒定的制冷剂组合物回流到压缩机，并且回流制冷剂的大部分流入第一级压缩机部分。 该三级体系也可应用于具有高压脱甲烷塔的乙烯装置。