Process and system for extracting helium from natural gas by membrane method

The invention provides a process and a system for extracting helium from natural gas by a membrane method, and relates to the technical field of extracting helium from natural gas. The process comprises a membrane separation process, an expansion power generation process and a helium refining proces...

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Bibliographische Detailangaben
Hauptverfasser:	XIANG RUNQING, LAI YONGJIE, NI HONGWEI, JIANG RONG, YAN LEI, CAO JUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY COMPOUNDS THEREOF ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEATING INORGANIC CHEMISTRY LIGHTING LIQUEFIED PETROLEUM GAS LUBRICANTS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NATURAL GAS NON-METALLIC ELEMENTS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a process and a system for extracting helium from natural gas by a membrane method, and relates to the technical field of extracting helium from natural gas. The process comprises a membrane separation process, an expansion power generation process and a helium refining process, natural gas enters the membrane separation process, separated permeated gas enters the helium refining process after being pressurized, high-purity helium is output, and non-permeated gas separated in the membrane separation process is introduced into the expansion power generation process for expansion power generation and then is sent to an application end. And the electric energy generated in the expansion power generation process is supplied to the membrane separation process and the helium refining process. The system comprises a membrane separation unit, the membrane separation unit comprises at least one membrane separator and a compressor for pressurizing and conveying permeation gas of the membrane sepa