Liquefied natural gas bottle sandwiching vacuum-pumping system and method with function of circularly heating inner container

Abstract

The invention discloses a liquefied natural gas bottle sandwiching vacuum-pumping system with a function of circularly heating an inner container. The system comprises a vacuum-pumping device, a liquefied natural gas bottle placing device and a liquefied natural gas bottle inner heating device, wherein the liquefied natural gas bottle inner heating device comprises a dry oil-free inner heating circulating fan, a heat inlet main pipe, a heat discharging main pipe, a heat inlet branch pipe and a heat discharging branch pipe; an air outlet of the dry oil-free inner heating circulating fan is communicated with the heat inlet main pipe, the heat inlet main pipe is communicated with the heat inlet branch pipe, and the heat inlet branch pipe is communicated with an air inlet of a to-be-heated liquefied natural gas bottle; an air outlet of the liquefied natural gas bottle is communicated with the heat discharging branch pipe, the heat discharging branch pipe is communicated with the heat discharging main pipe, and the heat discharging main pipe is communicated with an air inlet of the dry oil-free inner heating circulating fan. The system and method disclosed by the invention have the advantages that the vacuum-pumping does not need, meanwhile, a drying room is not utilized to persistently externally heat; the vacuum-pumping effect and production efficiency are guaranteed, and meanwhile, the manufacturing cost and using cost are also saved.

Description

technical field [0001] The invention relates to a vacuum pumping system and method, in particular to a vacuum pumping system and method for pumping the interlayer of liquefied natural gas cylinders. Background technique [0002] It is mentioned in the national standard of liquefied natural gas cylinders for vehicles "GB 24159-2009 Welded Insulated Gas Cylinders" and "Cryogenic Engineering" Magazine No. 6, 2007 "Application Status and Key Technologies of Cryogenic Insulated Gas Cylinders at Home and Abroad" and other documents However, the vacuum degree data in the interlayer of LNG cylinders is an important technical data of LNG cylinders, but how to ensure such data in the production process, and how to increase the output of LNG cylinders and ensure the product quality of LNG cylinders, There is still no relevant literature record. [0003] At present, most liquefied natural gas bottle production enterprises adopt the production method of industrial bottles. This method h...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a liquefied natural gas cylinder interlayer vacuum system and method with inner liner circulation heating, to solve the technical problems of high cost, high use cost and relatively large energy consumption of the existing vacuum system

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