CNG Gas Station
CNG 加气站 功能

CNG  Refueling Station
CNG refueling stations are used to supply CNG fuels to vehicles and secondary stations. The gas in piplines are usually purified to eliminate sulfur and water, and then compressed by compressors to increase the pressure from 0.1-1.0 Mpa to 25Mpa,and then fills vehicles through sales machine. CNG is an ideal alternative vehicle energy. Through decades of development, the application has grown mature. It has the advantages of low cost, high efficiency, no pollution, high safty and convenience.

Flow Chart of Primary and Secondary CNG Stations

CNG  Refueling Station:
Standard CNG refueling stations are built near natural gas pipelines.They take gas directly from pipelines. Natural gas, entering stations at 0.4 Mpa, is desulfurized and dewatered, and then goes through compressors to increase the pressure to 25Mpa, and finally comes into sales machines to refuel vehicle. The regular refueling quantity is 600-1000 Nm3/h.

Flow Chart of Standard CNG Refueling Stations:

Primary stations take natural gas directly form pipelines. Natural gas enters gas station at 1-1.5 Mpa. After being desulfurized and dewatered and compressed the gas is transported to secondary stations by storage cylinder trailers to refuel vehicles. Primary stations can also work as standard stations. They are often built near urban gate stations. The refueling quantity is 2500- 4000 Nm3/h.

Flow Chart of Standard CNG Refueling Stations

Secondary CNG Refueling Station:
Secondary stations are built at places where there is no natural gas pipelines. They are usually constructed in cities to refuel vehicles, or built at industrial areas in towns where there is no fuel gas piplelines to supply natural gas energy. Natural gas is compressed and stored at primary stations and is transported by special vehicles to secondary stations to refuel vehicles. As regards secondary stations in industrial areas, the process is as follows: low or medium pressure natural gas goes through compressors to increase pressure to 20-25Mpa, and then the gas is compressed into special steel cylinders or bundles and carried by sled trucks to secondary stations. The gas enters CNG pressure regulating devices through unloading columns. The gas is depressurised by sleds to 0.2-0.4Mpa and enters pipe network to end users.

Traditional Secondary Refueling Station Process

Flow Chart of Secondary CNG Refueling Station