How does a hydrogen compressor compress hydrogen?

Different from requirementsOxygen compressor和Nitrogen compressorHydrogen is usually produced at a relatively low pressure and must be compressed before transportation, so hydrogen compressors are usually used for compression for subsequent work.

main:

• Hydrogen compressorCompression process

• Device Selection

Hydrogen compressor compression process

Prepare the hydrogen source and ensure that it works normally and efficiently to provide enough gas to be transmitted to the hydrogen compressor. You can obtain hydrogen in simple ways, such as passing water through water, reacting acid with zinc or extracting hydrogen from fossil fuels. Ensure that there are no leaks during the hydrogen production process to prevent any accidents. You can use hydrogen monitoring equipment purchased from a safe equipment store to detect hydrogen leaks.

Use a threaded hose to connect the hydrogen source to the inlet of the diaphragm compressor, and then turn off the tap to prevent gas flow. Use an external pump to push the gas into the compressor because the compressor itself draws gas from the inlet to its hydraulic pump. Ensure that the connection between the hydrogen source and the hydrogen compressor is sealed.

Prepare the gas tank and check for cracks. Ensure that the valve is not damaged again to prevent any accidents. Connect the compressor to the oil tank with a hose with a pressure gauge. The pressure gauge is used to measure the pressure inside the tank, so you know when you should stop pumping gas into the tank. It is wise to store hydrogen at 800 atmospheres.

Turn the tap from the hydrogen source to let the gas flow into the compressor inlet. The diaphragm compressor is energized, and then observe the movement of the pressure gauge. When the reading is 800 bar, the compressor will shut down. Note: The transfer of compressed gas from the gas tank to the car engine will cause a slight loss of compression energy.

Device Selection

Hydrogen compressors have diaphragm, reciprocating piston, rotary, screw and turbine types. Choose the appropriate type according to the flow rate, suction and discharge pressure. The flow rate of the piston compressor is large, and the single-stage compression ratio is generally 3:1~4:1. The membrane compressor has fast heat dissipation, and the compression process is close to an isothermal process. It can have a higher compression ratio as high as 20:1. However, due to the small flow rate, it is mainly used for high hydrogen pressure applications, but the flow rate is not large.

Generally, compressors with pressures below 30MP are usually piston type. Experience has proved that they are very reliable and can consist of a compressor. When the pressure is higher than 30MP and the volume flow is small, the membrane compressor can be selected. The advantage of the diaphragm type is that the seal is reliable under high pressure: because the sealing structure of the gas chamber is a diaphragm sandwiched between the cylinder head and the cylinder block, the main bolt is fixed as a static seal and can prevent gas leakage And the membrane cavity is closed and will not come into contact with any oil droplets, oil mist and other impurities, thus ensuring that the gas entering when the gas is compressed is not polluted by the outside. In the case of high purity media, this shows a special advantage. The structure of the hydrogen compressor includes basic components (such as crankcase, crankshaft, connecting rod, etc.), cylinder components, plunger components, cooler components, safety protection control system and other auxiliary components.

Most compressors currently used for gaseous hydrogen compression are positive displacement compressors or centrifugal compressors. The positive displacement compressor may be a reciprocating compressor or a rotary compressor. But they all have the same function, you can choose the model according to your needs.