1.LNG is transported from the tank car to the gasification station, and the pressure in the tank car is increased by using the LNG unloading supercharger, and the LNG in the tank car is sent to the LNG cryogenic storage tank for storage.

2. When discharged from the LNG storage tank, firstly, the storage tank is pressurized by the self-pressurization system of the storage tank, then the liquid phase outlet valve of the storage tank is opened, and the LNG in the storage tank is sent to the gasifier through the pressure difference, and then sent to the municipal gas pipeline network through the processes of pressure regulation, metering and odorization.

3. When the outdoor environment temperature is low and the natural gas temperature at the outlet of the air-cooled gasifier is lower than 5℃, a water bath heater should be connected in series at the outlet of the air-cooled gasifier to heat the gasified natural gas.

Extended data:

Facility request

① ① The technological characteristics of ①①LNG station are "low temperature storage and normal temperature use". The design temperature of the storage tank reaches-196 degrees Celsius (the normal temperature boiling point of LNG is-162 degrees Celsius), and the natural gas outlet temperature is required to be not lower than the ambient temperature 10 degrees Celsius.

② The cryogenic storage tank and cryogenic liquid pump in the station have good thermal insulation performance, and the valves and pipe fittings have good cold insulation performance.

③ The equipment, pipelines, instruments, valves and their accessories in the low-temperature area of ③LNG station have good operation performance, good mechanical strength, sealing performance and corrosion resistance under low-temperature working conditions.

(4) Because the start-up process of cryogenic liquid pump depends on the frequency converter to continuously increase the rotating speed, thus increasing the power, increasing the flow rate and providing high output pressure, cryogenic liquid pump requires to quickly increase the frequency and expand the power, generally within a few seconds to more than ten seconds, with good cold insulation performance.

⑤ Gasification equipment should be able to resist earthquakes and typhoons, and meet the design requirements under general climatic conditions, so as to achieve maximum atmospheric flow.

⑥ The manufacturing and daily operation management of cryogenic storage tanks and filters have been incorporated into the national standards for manufacturing, acceptance and supervision of pressure vessels; Gasifiers and cryogenic hydrocarbon pumps are not regulated by relevant laws and regulations in China. In the manufacturing process, the relevant American industry standards shall be implemented, and the welding, modification, maintenance or moving position of pressure vessels must be reported to the pressure vessel inspection unit.

Baidu encyclopedia -LNG gasification station