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RU2708667C1_PLANT AND METHOD OF EXTRACTING ETHANE FROM NATURAL GAS USING CASCADE COOLING

专利基本信息
申请号RU2018143421申请日2018-01-08
公开(公告)号RU2708667C1公开(公告)日2019-12-11
申请公布号RU2708667C1申请公布日2019-12-11
分类号C07C7/00;C07C7/04;C10G5/06;F25J3/02分类有机化学〔2〕
发明人-申请(专利权)人
ЧАЙНА ПЕТРОЛЕУМ ИНЖИНИРИНГ энд КОНСТРАКШН КОРП.
CHINA PETROLEUM ENGINEERING & CONSTRUCTION CORP.
代理机构-代理人-
地址-
摘要FIELD: refrigerating equipment.SUBSTANCE: disclosed is an plant for extracting ethane from natural gas using cascade cooling, which comprises a refrigerator, a low-temperature separator, a demethanizer, a deethanizer, a heat exchange system with propane or propylene and a heat exchange system with ethylene, wherein the coolant natural gas outlet element is connected to the low-temperature separator; with the low-temperature separator liquid phase outlet element, the demethanizer, the deethanizer, the deethanizer condenser, the deethanizer reflux tank, heat exchange system with propane or propylene and a heat exchange system with ethylene; gas phase from the upper part of the demethanizer is successively passed through a cooler, an expander and a compressor of the obtained gas; an outlet element for natural gas of the heat exchange system with ethylene is connected to an inlet element in the upper part of the demethanizer; propane or propylene compressor, propane or propylene condenser and heat exchange system with propane or propylene are connected to form a circulation circuit; an ethylene compressor, a heat exchange system with propane or propylene and a heat exchange system with ethylene are connected to form a circulating circuit. Also disclosed is a method of extracting ethane from natural gas using an plant which is described above using cascade cooling.EFFECT: providing relatively low pre-cooling temperature and increasing the volume of ethane production using "cascade cooling + cooling in expander" technology, used at varying pressure of incoming gas, as well as provide low power consumption and simplify the design to facilitate operation of the plant.9 cl, 1 dwg
PLANT AND METHOD OF EXTRACTING ETHANE FROM NATURAL GAS USING CASCADE COOLING
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