Pretreatment device and method for production of compressed natural gas from LFG (landfill gas)

The invention provides a pretreatment device and method for production of compressed natural gas from LFG (landfill gas). The pretreatment device comprises an LFG pipeline, a water replenishing pipeline, a product gas pipeline, a water spraying screw compressor, a liquid filter, a gas-liquid cooler...

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Bibliographische Detailangaben
Hauptverfasser:	ZHOU YIMIN, HUANG XIANBO, LUO SHIZHONG, LI DONG, HUANG YAJUN, YE CHANGYING
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEATING LIGHTING LIQUEFIED PETROLEUM GAS LUBRICANTS MECHANICAL ENGINEERING METALLURGY NATURAL GAS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PIPE-LINE SYSTEMS PIPE-LINES SEPARATION STORING OF DISTRIBUTING GASES OR LIQUIDS 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 pretreatment device and method for production of compressed natural gas from LFG (landfill gas). The pretreatment device comprises an LFG pipeline, a water replenishing pipeline, a product gas pipeline, a water spraying screw compressor, a liquid filter, a gas-liquid cooler and a gas-liquid separator, wherein the LFG pipeline, the water replenishing pipeline and a process water outlet of the gas-liquid separator are all connected with an inlet of the water spraying screw compressor; the process water outlet is connected with the inlet of the water spraying screw compressor through the liquid filter; an outlet of the water spraying screw compressor is connected with an inlet of the gas-liquid separator through the gas-liquid cooler; the product gas pipeline is connected with a balanced gas seal gas inlet of the water spraying screw compressor. The process can be simplified, and the equipment and operation cost and the output of sewage can be reduced.