Refueling process and equipment of CNG refueling station

Refueling process and equipment of CNG refueling station

The natural gas of the refueling station is drawn from the high-pressure or medium natural gas pipeline network. Then it enters the dryer after filtering and metering, and then enters the compressor for pressurization after being dried.

After that, it is buffered by the buffer tank, and then fills the natural gas for the storage well set through the priority/sequence control panel, or directly delivered to the refueling machine for refueling CNG-fueled vehicles. Or we can use the natural gas in the storage well set to refuel CNG-fueled vehicles through the refueling machine.

Thus, the main equipment of the CNG refueling station is.

Filter, flow meter, regulator.Dryer.

Buffer tank, compressor, recovery tank.

Sequence control panel, gas storage well, gas storage cylinder set (large and small).

Gas filling machine.

How do these types of equipment work?

Dryer

Adsorption drying is a physical process in which the adsorbent separates the water from the natural gas when the natural gas containing water passes through the adsorbent bed, thus drying the natural gas. After the adsorbent reaches saturation, the adsorbent bed is regenerated by means of high-temperature regeneration of the gas to drive the moisture out of it, thus realizing the regeneration of the adsorbent.

Compressor

The CNG compressor is the heart of the whole refueling station, which is the equipment to compress and pressurize the raw natural gas to make the pressure rise not more than 25MPA. Its performance directly affects the reliability and economy of the whole refueling station operation.

The sequence control panel

Compressed natural gas is sequentially distributed to each individual storage cylinder group (well) in the order of high, medium, and low, until the storage cylinder group (well) is full, to achieve the purpose of the compressor in the order of high, medium, and low filling.

The gas storage

Gas storage well storage is a way to store high-pressure natural gas using the mature drilling and storage technology of the petroleum system, using underground wells.

Gas filling machine

A filling machine is a filling device that fills the high-pressure natural gas from the storage unit into the vehicle’s gas cylinder. The filling machine handles controlling the sequence and flow rate of the gas selling process and ensures the safety of the gas selling process.