Full-vacuum horizontal liquefied natural gas (LNG) submerged pump pool

Abstract

The invention discloses a full-vacuum horizontal liquefied natural gas (LNG) submerged pump pool. The full-vacuum horizontal LNG submerged pump pool comprises a pump pool body, a submerged pump pool and a support. A liquid outlet device which is arranged on the inner side of a pump pool cap is in a structure of high vacuum and heat insulation and an outer casing tube which is arranged on the outer side of the pump poop cap is fixedly connected with a vacuumized joint. The vacuumized joint is communicated with the liquid outlet device and the structure of high vacuum and heat insulation of the full-vacuum horizontal LNG submerged pump pool is formed by the vacuumized joint and a high-vacuum and heat-insulated interlayer between an outer cylinder and inner cylinder of the full-vacuum horizontal LNG submerged pump pool. According to this arrangement, all ways of heat leakage, such as convention, conduction and radiation can be eradicated so that good cold-insulated effect can be ensured. The rate of evaporation per day of LNG in the full-vacuum horizontal LNG submerged pump pool can be reduced by 21.5% to 31.5% compared with the vertical submerged pump pool in the prior art. The full-vacuum horizontal LNG submerged pump pool can be used for filling vehicles or transporting vehicle-mounted LNG, so as to greatly improve the economic benefit of LNG filling stations, LNG transportation and filling vehicles.

Description

technical field [0001] The invention relates to an LNG submersible pump pool, in particular to an all-vacuum horizontal LNG submersible pump pool. Background technique [0002] As of the end of November 2012, the number of LNG refueling stations in operation in China has risen to more than 600; from 2015 to 2020, the number of LNG refueling stations is expected to exceed 10,000, and the growth of the industry is astonishing. [0003] Liquefied natural gas (LNG) vehicle is a new energy vehicle, which has the advantages of economy, safety, environmental protection, convenience, mobility, long mileage, short filling time (compared to compressed natural gas), etc. It is widely promoted and used among cargo trucks, and it is an ideal way for large-scale development of natural gas vehicles in cities. According to statistics, 60% of urban atmospheric pool environmental pollution comes from motor vehicle exhaust. Test data show that: buses use LNG fuel, and the comprehensive exhau...

AI Technical Summary

Problems solved by technology

At present, LNG vehicle filling stations at home and abroad are all "vertical non-full vacuum LNG submersible pump pools". The static pressure head of the phase inlet and the non-vacuum insulation of the equipment flange cover on the top of the pump pool directly affect the normal and stable operation of the LNG cryogenic centrifugal pump. At the same time, the discharge rate of the LNG cryogenic storage tank also affects the efficiency of the LNG vehicle filling station. The operating cost and the filling efficiency of whether the submersible pump is in normal operation are not up to the expected economic benefits of the initial station construction

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