Vehicle-mounted methane freezing, liquefying and separating device

Abstract

The invention relates to a vehicle-mounted methane freezing, liquefying and separating device which comprises a nitrogen compressor, a condenser, a compressed nitrogen storage pot and a nitrogen swelling, freezing and separating cabin. The device is characterized in that the nitrogen compressor, the condenser, the compressed nitrogen storage pot and the nitrogen swelling, freezing and separating cabin are uniformly arranged on a truck, wherein the nitrogen swelling, freezing and separating cabin is respectively provided with a methane inlet and a water outlet and respectively communicated with a normal pressure nitrogen storage bag, the compressed nitrogen storage pot, a liquefied and vulcanized hydrogen storage pot, a liquid methane storage pot and a liquid carbon dioxide storage pot; the normal pressure nitrogen storage bag is communicated with the compressed nitrogen storage pot through a nitrogen compression device via a cooler; and the nitrogen compressor is connected with a methane generator through a gear box. The device has the advantages of flexibility, light weight, convenience, movability and convenient running, reduces the transportation cost and the power cost of straw raw materials and methane dreg waste and can be used for recovering carbon dioxide and realizing low-carbon agricultural development. Moreover, the device increases the side product income of methane processing and also has the advantages of income increase, energy saving and environmental protection.

Description

technical field [0001] The invention relates to a vehicle-mounted biogas freezing, liquefaction and separation device, specifically a device capable of moving with the vehicle to a biogas producing area, freezing, purifying and separating the biogas on the spot, and producing liquid carbon dioxide and liquefied methane (LNG). Background technique [0002] At present, the upsurge in the development of biomass energy is on the rise, and several important development directions such as biodiesel, alcohol fuel, and biogas have been formed. Biodiesel and alcohols are mainly extracted from plant seed oil or stalk sugar, and eventually they all encounter the insurmountable dilemma of lack of land for raw material planting. If it develops on a large scale, it will inevitably compete with existing industries for land. However, energy conversion methods such as straw incineration for power generation, straw cracking, and cellulose ethanol require large-scale centralized processing of...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome a series of problems such as scattered resources, difficult collection, low transportation efficiency, too concentrated seasons, large investment capital, and high operating costs in order to convert large-scale utilization of agricultural and forestry straw waste into vehicle biogas. , to provide a vehicle-mounted biogas freezing liquefaction separation device, which converts the biogas converted from agricultural and forestry wastes in situ into vehicle biogas and its device

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