The requirements for hydrogen compression involve multiple aspects, including the selection of Hydrogen Compressors, the safety of the compression process, compression efficiency, and the quality of compressed hydrogen gas. The following is a detailed explanation of the requirements for hydrogen compression:
1. Selection of Compressor
Type selection:
Select the appropriate compressor type based on the flow rate of hydrogen, the pressure that needs to be increased, and the application scenario. For example, for large and medium-sized hydrocracking units, the new hydrogen compressor usually uses a reciprocating compressor, while the circulating hydrogen compressor uses a centrifugal compressor.
Performance requirements:
The compressor should have the characteristics of high pressure, high flow rate, safety, and good sealing to prevent hydrogen embrittlement and minimize energy loss as much as possible.
The operation of the compressor should be smooth, reliable, easy to control and maintain.
2. The safety of the compression process
Prevent leakage:
The hydrogen compressor should be equipped with strict safety protection measures, such as membrane damage alarm devices and interlock shutdown devices, to prevent hydrogen leakage.
Effective sealing devices should be installed in the intake, exhaust, and cooling systems of the compressor to ensure that hydrogen does not leak into the external environment.
Prevent explosion:
Hydrogen is a flammable and explosive gas, so during the compression process, factors such as temperature, pressure, and sparks that may cause explosions should be strictly controlled.
The compressor should be equipped with explosion-proof devices such as explosion-proof motors, explosion-proof switches, etc., and a firewall or explosion-proof wall should be installed around the compressor.
Operational safety:
Compressor operators should receive professional training and be familiar with the operating procedures and safety precautions of the compressor.
During the operation of the compressor, regular inspections and recording of the compressor's operating parameters should be carried out to promptly detect and handle any abnormal situations.
3. Compression efficiency
Increase compression ratio:
The compression ratio of a compressor refers to the ratio of the outlet pressure to the inlet pressure of the compressor. In order to improve compression efficiency, the compression ratio should be increased as much as possible.
The compression ratio can be improved through multi-stage compression, selecting the appropriate compressor type, and optimizing the operating parameters of the compressor.
Reduce energy loss:
During the compression process, there will be a certain amount of energy loss. In order to reduce energy loss, the structural design and operating parameters of the compressor should be optimized.
Advanced compressor technologies such as isothermal compression and variable frequency speed regulation can be used to reduce the energy consumption of the compressor.
4. Compressed hydrogen gas quality
Maintain hydrogen purity:
During the compression process, it should be ensured that hydrogen does not come into contact with impurities such as lubricating oil and cooling water to maintain the purity of hydrogen.
For compressors lubricated with lubricating oil, effective oil-water separation devices and hydrogen purification devices should be installed to remove impurities from hydrogen gas.
Control compression temperature:
During the compression process, a certain amount of compression heat will be generated. In order to control the compression temperature, effective cooling devices such as coolers and cooling water jackets should be installed.
By controlling the flow rate and temperature of the cooling water, it is possible to ensure that the temperature of the compressed hydrogen gas does not exceed the allowable range, thereby maintaining the quality and stability of the hydrogen gas.
In summary, the requirements for hydrogen compression involve multiple aspects such as compressor selection, safety during the compression process, compression efficiency, and the quality of compressed hydrogen gas. In practical applications, comprehensive consideration and optimization design should be carried out based on specific needs and conditions to meet the various requirements of hydrogen compression.
