How to deal with hydrogen compressor failure?

Have you ever experiencedHydrogen compressor failure? Then you just need to worry because you don't understand the structure of the machine. With a general understanding of the following, you will know in advance what happened to the compressor before it failed and solve it in advance.

point:

• Hydrogen compressor accident performance

• method

• Selection requirements for high pressure hydrogen compressor

Hydrogen compressor accident performance

1. The amount of hydrogen suddenly decreases, the pressure of hydrogen drops, and the flow of hydrogen is zero.

2. The temperature at the entrance fluctuates and rises.

3. The system pressure drops.

4. The hydrogen compressor is turned off, and the pressure at all levels is abnormal.

method

1. If the compressor fails, normal production can be restored by switching the standby machine.

2. If all hydrogen generators fail and there is no other hydrogen available, please follow the steps below.

3. The internal operation will change the temperature control of the reactor to manual operation, lower the inlet temperature of the reactor and reduce the feed volume of the device.

4. Notify the external operator to go to the field equipment to change the large cycle operation, open the product and replace the unqualified pipeline valve, and then close the valve.

5. Reduce the amount of steam stripped in the dehydrogenation stripper, stop the pump and the scale inhibitor pump.

6. The circulating hydrogen continues to circulate and maintain the system pressure as much as possible. If the pressure drops to the minimum operating pressure of the circulating hydrogen compressor, the system will be filled with hydrogen to maintain operation.

7. Change the circulating hydrogen to pass through the pipeline, keep the solvent circulating, remove the low gas before removing the gas, and then release the fuel gas from the torch to ensure the normal operation of the desulfurization system.

8. The exhaust valve of the steam generator is opened to prevent the steam from carrying water.

9. If hydrogen is not provided for a long time, please contact the production management department to stop the installation.

Selection requirements for high pressure hydrogen compressor

l Unit selection requirements

Compressors are generally divided into two types: turbine type and positive displacement type. The choice of compressor depends entirely on the technical requirements related to the device used, such as gas type, volume displacement and pressure to be achieved. For high-pressure hydrogen, only diaphragm and piston compressors (both positive displacement compressors) can be used. The main technical advantages of the piston-type hydrogen compressor are: high efficiency, relatively simple unit control system, almost constant discharge pressure during gas volume adjustment, and high reliability. Diaphragm hydrogen compressor has the characteristics of large compression ratio, wide pressure range and good sealing performance. Since its air cavity does not require any lubrication, it can ensure the purity of the compressed gas, which is especially suitable for the compression, transportation and filling of flammable, explosive, toxic and harmful high-purity gas (such as hydrogen). According to the different exhaust pressure, it is generally divided into single-stage compression and two-stage compression. The pressure of the primary compression is usually increased from 0.1 MPa to 1.0 MPa, and the pressure of the secondary compression is usually increased from 1.0 Pa to 20 MPa, and the flow rate is usually 5 to 1000 m 3 /h. The disadvantage is that the gas volume is smaller than the reciprocating hydrogen compressor and the efficiency is low. From a safety point of view, diaphragm compressors are usually used to transport hydrogen.

l Material requirements

Safety, economy and easy maintenance are the basic requirements for choosing a high-pressure hydrogen compressor. On the premise of ensuring safety, the most economical and convenient maintenance is possible. The safety of hydrogen compressors is reflected in material selection, safety protection control, pipeline requirements and sealing requirements. Hydrogen is prone to intergranular corrosion of certain metals under high temperature and high pressure, which can cause danger when parts are broken under high temperature and high pressure. Therefore, choosing the right material can avoid this danger. Generally, austenitic stainless steel can avoid hydrogen intergranular corrosion at high temperature and high pressure, and 316 austenitic stainless steel is usually selected for hydrogen compressors. The density of hydrogen is very small and the leakage capacity is very strong. When the leaked hydrogen reaches a certain concentration in the air, it will burn or even explode in fire. Therefore, when designing a hydrogen compressor, sealing should be considered from all aspects to ensure that hydrogen does not leak.

For each failure, the behavior of the machine will be different. If you want to learn about other compressor failures, for exampleOxygen compressor,Nitrogen compressor.