Daily operation and maintenance experience of pressure swing adsorption nitrogen production equipment:

one Air pretreatment system:

1. Q filter element: It is recommended to replace every 6 months, but before this, if the pressure gauge pointer is shown to the red zone, it must be replaced.

2. P filter element: It is recommended to replace every 12 months, but before this, if the pressure gauge pointer is shown to the red zone, it must be replaced.

3. S-grade filter cartridge: Replace every 12 months, but before that, if the differential pressure gauge pointer appears in the red zone, it must also be replaced.

4. Refrigerated dryer:

A. Adhere to the transpiration pressure (R22) between 0.4 and 0.5MPa (depending on different refrigerant standards).

B. It is recommended to install air pipes and clean the cooler regularly.

C. Check the active drainer daily to avoid blocking and losing the drainage effect. If it is blocked, the manual valve can be slightly opened, the self-discharge valve can be closed, and then the active drainer can be removed for differentiation and cleaning. When cleaning the active drainer, use soap to clean it. Corrosive solutions such as gasoline, toluene and rosin water are prohibited.

D. Check the fins of the air cooled condensing cooler daily to see if they are clean. Clean regularly. Most of the equipment of the factory (including the cold and dry machine) are placed in the iron shed built outside the workshop, so the working environment is relatively poor, especially the dust is more, the machine will make the cooler collect a lot of dust after a period of use, need to be sorted out in time to avoid the effect and life of the dryer due to poor heat dissipation.

E. Air-cooled: Clean condensing cooler (extractor) filter can be washed with compressed air spray gun. In case of severe blockage, cleaning agents can be used to clean, but do not use solvents that will erode copper pipes and fins.

Water-cooled type: a) Usually adhere to the clean water filter.

b) If necessary, remove the preliminary plate and clean it with an extended soft brush.

c) or contact the original service department to help with maintenance.

F. Always pay attention to the dryer inlet air volume, temperature and pressure is not beyond the extra.

5. Active blowdown valve: pay attention to the investigation when running, if the appearance of no blowdown should be cleaned or replaced in time.

two Oxygen nitrogen separation system:

1. Solenoid valve: Life is about 2 years.

2. Sensors: The service life of sensors with different analytical surfaces is not the same.

3. Pneumatic valve seals: life is about 2 years, the use of life is 1.5 million times, in order to ensure the normal operation of the equipment, advocate the user to replace a year.

4. Dust filter cartridge: Replace every 18 months, after each screening.

5. Molecular sieve: According to the user's application status, the user is advocated to increase in a year.

Three. Nitrogen purification system:

1. Catalyst:

2, molecular sieve: standard: 13X

3, pipe type pneumatic valve seals (high temperature resistance) : the service life is 1.5 million times, in order to ensure the normal operation of the equipment, advocate the user to replace it for one year.

4, frozen dryer (ibid.)

5, dust filter element: replace every 12 months, replace each time after screening.

6, electric heat pipe:

7, thermocouple:

8, explosion-proof solenoid valve: life is about 2 years.

9, solid state relay:

*PSA pressure swing adsorption nitrogen making machine

Need to see and note:

• Check solenoid valve sensitivity

• Check pipe valve sensitivity

• Check the accuracy of the nitrogen analyzer

• Check that pressure regulation is normal

• Check the compression status of the adsorption tower

• Check the nitrogen filter for dust

• Pay attention to the black (white) powder discharge of the muffler should be stopped immediately

• Pay attention to the cleanliness of the flowmeter inner tube

Need to replace the wearing part title:

• Replace the filter cartridge

• Replace pipe pneumatic valve seal ring

• Replace active carbon (depending on actual situation)

• Replace the check valve seals

• Add molecular sieve (depending on the actual situation)

* Ammonia differentiation hydrogen production equipment:

Need to replace the wearing part title:

• Furnace Furnace

• Nitrogen purification equipment for electric contact pressure gauge

Need to see and note:

• Check the air tightness of the device

• Check whether the heating element and electrical control system are normal

• Check the condition of the blowdown valve

• Check the pressure difference between the front and back of the device

• Pay attention to the control of the hydrogenation amount

• Pay attention to the regas flow rate of the drying tower

• Pay attention to the temperature and time of regeneration of the drying tower

Need to replace the wearing part title:

• Replacement of 13X molecular sieve (depending on actual situation)

• Replace filter cartridge or clean

• Replace pipe pneumatic valve seal ring

• Replace the deaerator

* Gas purification equipment:

Need to replace the wearing part title:

• 5A molecular sieve

• Electric heating rod