LNG refueling station

1. LNG refueling station Introduction:
After purification by natural gas (removal of CO2, sulfur compounds, heavy hydrocarbons, water and other impurities), at atmospheric pressure cryogenic at -162 ℃, by the gas into a liquid, called liquefied natural gas, the volume of LNG is about the same the quality of natural gas volumes 1/620, weighs about the same volume of water is about 45%.

Designed and built by Cryostat, LNG stations deliver natural gas for refueling vehicles, either in liquid or gaseous form, or combined. Liquid natural gas (LNG) is stored in a cryogenic tank and then pumped directly to a dispenser for liquid delivery. Alternatively, it can be pressurized and vaporized for delivery as compressed natural gas (CNG).

Storing natural gas as a liquid instead of a gas greatly increases supply flexibility. Natural gas decreases about 600 times in volume when liquefied, which makes transport and storage much more efficient and cost-effective.

2. Classification:
LNG supply liquefied natural gas filling stations LNG filling stations, divided into four types, which are generally divided into:
● Skid-mounted stations
● The standard formula stations
● L-CNG filling stations
● Skid-mounted mobile stations

3. LNG station consists of:
● A cryogenic storage tank for LNG; typical size 60-70m³
● A cryogenic submerged centrifugal pump skid for transferring the LNG
● System featuring patented equipment to convert cold liquefied natural gas to saturated LNG at a higher temperature
● Weights and measures certified dispensers for LNG, connected to a payment system
● Flow management skid for easy future extensions to the LNG station
● LNG cooling system using patented equipment to deliver cold LNG and eliminate the risk of gas being released from the storage tank
● Gas and leak detection equipment
● Complete PLC control system supporting remote access

4. LNG station specification
Specification of LNG storage tanks :

Specification of Pumps and submersible pump skid

Specification of Skid mounted pump

Specification of cryogenic submersible pump

5. Safety Knowledge:
(1) LNG has a very low atmospheric pressure at ambient temperature: -162 ℃;
(2) With great gas-liquid volume ratio, if inappropriate measures pressure will lead to pressure rise rapidly. LNG gas-liquid volume ratio of approximately 620: 1;
(3) pre-fill a small amount of natural gas loss rate of vaporization larger return result;
(4) Within the city unavoidable presence LNG vehicle emission problems;
(5) Natural gas is a combustible gas, the production area has obvious security identity;
(6) Skid-mounted LNG refueling stations should have a comprehensive safety measures and fixed-point using do not just move to use a vacuum process piping is not allowed treading;
(7) Non-collision during transport tanks, tank must maintain a vacuum degree;
(8) Maintaining equipment ventilated area;
(9) To ensure that during repair or maintenance of the system is the pressure relief device;
(10) Away from flammable materials or spark;
(11) Electrical parts, and instrumentation, some not water;
(12) All electrical equipment in hazardous areas shall comply with the requirements Explosion levels;
(13) There are LNG in the region, you cannot use open flame or any unauthorized electrical and communications equipment, such as mobile phones and radio transmitters. Precautions