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CN104845690A 一种生物质沼气制取LNG的设备及方法 无效 - 驳回

一种生物质沼气制取LNG的设备及方法
摘要：
本发明公开了一种生物质沼气制取LNG的设备及方法，其中设备包括顺次连接的制沼用生物质储存罐、厌氧发酵罐、沼气精处理装置、中压丙烷换热器、低压丙烷换热器、高压天然气分离器、乙烯换热器、中压LNG换热器、中压天然气分离器、低压LNG换热器、低压天然气分离器和LNG储槽。LNG的制备方法包括生物质预处理、厌氧制沼、固液分离、出流储存、气体收集、沼气精处理、LNG制备等工艺。本发明能够使用生物质沼气制取LNG，开辟一条新的制取LNG的道路，缓解我国天然气资源匮乏的问题。
摘要（英）：

The invention discloses a device and a method for preparing LNG (Liquefied Natural Gas) by using biomass biogas. The device comprises a biogas-producing biomass storage tank, an anaerobic fermentation tank, a fine biogas treatment device, a medium-pressure propane heat exchanger, a low-pressure propane heat exchanger, a high-pressure natural gas separator, an ethylene heat exchanger, a medium-pressure LNG heat exchanger, a medium-pressure natural gas separator, a low-pressure LNG heat exchanger, a low-pressure natural gas separator and an LNG storage tank which are connected with one another in sequence. The method for preparing LNG comprises a biomass pre-treatment process, an anaerobic biogas-producing process, a solid-liquid separation process, an outflow storage process, a gas collection process, a fine biogas treatment process, an LNG preparation process and the like. By virtue of the device and the method, LNG can be prepared by the biomass biogas; a novel LNG preparing method is created; the problem of lack of the natural gas resource in China can be relieved.

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