Movable liquefied natural gas (LNG) pump-free filling device

Abstract

The invention provides a movable liquefied natural gas (LNG) pump-free filling device. The movable LNG pump-free filling device comprises an LNG low-temperature storage tank, an LNG filling machine and a storage tank booster. The LNG low-temperature storage tank is divided into two ways from a storage tank liquid outlet valve, one way is connected with the LNG filling machine, and the other way is connected with the storage tank booster through a boosting adjusting valve. The LNG low-temperature storage tank is further provided with a lower liquid inlet valve and an upper liquid inlet valve which are gathered, and the LNG low-temperature storage tank is connected with a gas phage opening of the storage tank booster and a gas return opening of the LNG filling machine through storage tank gas phase opening root valves. The movable LNG pump-free filling device has the advantages and positive effects that the structure is compact and simple; low-temperature parts in the device are all of a vacuum cold insulation structure; the thermal insulation property is good, and the amount of generated boil off gas (BOG) is small; fuel of a pry car is gas phase natural gas in the storage tank, excessive BOG can be consumed and prevented from being discharged, and other fuels are not needed.

Description

technical field [0001] The invention belongs to the technical field of liquefied natural gas filling station equipment, and in particular relates to a mobile LNG pumpless filling device. Background technique [0002] Natural gas is a clean and efficient emerging energy source. At present, LNG (liquefied natural gas) vehicles are widely used. Large-scale heavy trucks and inter-provincial long-distance buses use LNG as fuel. The mileage is long and the fuel consumption is large. After changing the fuel, the environmental protection and economic benefits are more effective. Obviously, because of the large-scale construction of LNG (liquefied natural gas) vehicle filling stations, the number of LNG (liquefied natural gas) vehicles is also increasing. [0003] LNG filling stations in the prior art are all fixed stations, generally built on the side of provincial and national roads, compared with gas stations, there are still very few LNG filling stations, some areas have only one...

AI Technical Summary

Problems solved by technology

[0003] LNG filling stations in the prior art are all fixed stations, generally built on the side of provincial and national roads, compared with gas stations, there are still very few LNG filling stations, some areas have only one filling point for a long distance, and Queuing of vehicles or lack of liquid in storage tanks often occurs, resulting in heavy trucks and buses fueled by LNG being unable to refuel and therefore unable to drive, affecting economic operation

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