LNG gasification skid mainly includes: low temperature storage tank, LNG unloading system, air temperature vaporizer, unloading supercharger, storage tank booster vaporizer, NG reheater, BOG vaporizer, EAG heating vaporizer, etc.
The LNG is transported from the tanker to the gasification station, and the LNG unloading supercharger is used to increase the pressure in the tanker, and the LNG in the tanker is sent to the LNG cryogenic storage tank for storage. When discharging from the LNG storage tank, the self-pressurization system of the storage tank is used to increase the pressure of the storage tank, and then the liquid phase outlet valve of the storage tank is opened, and the LNG in the storage tank is sent to the vaporizer through the pressure difference. , and sent to the municipal gas pipeline network through the processes of pressure regulation, metering, and odorization. When the outdoor ambient temperature is low and the natural gas temperature at the outlet of the air-temperature vaporizer is lower than 5°C, a water bath heater should be connected in series at the outlet of the air-temperature vaporizer to heat the vaporized natural gas.
Since the daily evaporation rate of the LNG in the cryogenic storage tank and the cryogenic tank car is about 0.3%, this part of the evaporated gas (flash steam for short BOG) increases the pressure of the gas phase space of the storage tank. In order to ensure the safety of the storage tank and the needs of loading and unloading trucks, a storage tank safety pressure reducing valve is set in the design to automatically remove BOG. The generated BOG gas passes through the vent valve to the BOG heater for heating, and then enters the BOG storage tank for storage. The recovered BOG can also directly enter the pipe network after pressure regulation, metering and odorization.
https://www.chinavaporizer.com/