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 Innleggets emne: Operation rules for nitrogen generator
InnleggSkrevet: Tir Aug 29, 2017 6:32 am 
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Registrert: Tir Aug 29, 2017 6:21 am
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Safety Practice for PSA Nitrogen Generators

Operation rules for nitrogen generator

1. boot:

1.1. When the compressed air supply pressure reaches 0.7MPa or more, open the total import inlet valve of the nitrogen generator, adjust the pressure of the valve at the working gas source of the pneumatic valve to 0.4-0.5Mpa;

1.2. Turn on the power switch of the nitrogen generator on the PLC main control cabinet clockwise. In the nitrogen machine control cabinet oxygen meter set on the oxygen content of the upper limit, the device work properly. According to the pressure changes of the two adsorption tower to determine whether the normal adsorption of the two adsorption tower, the regeneration tower pressure is zero, even when the two tower pressure should be close to the original work tower pressure half.

1.3. Adjust the oxygen analyzer Sampling pressure regulator to adjust the pressure to 1.0bar, adjust the sampling flow meter, the gas volume can be adjusted to 1 or so, pay attention to the sample gas should not be too large. Began to detect nitrogen purity.

1.4. Adjust the nitrogen purge valve opening to adjust the purity and flow of nitrogen. Slowly open the vent valve, adjust the flow to the rated flow of 1/2. When the nitrogen purity to meet the requirements, slowly open the pure gas outlet cut-off valve, the flow rate to the required flow, close the vent outlet valve, the normal operation of the equipment can be put into use.

2. Shutdown:

2.1. Close the nitrogen outlet valve and the sampling valve;

2.2. Close the compressed air inlet valve;

2.3. Turn off the power of the nitrogen generator;

3. Follow the table to service and maintain the equipment:

check contents

The same time as

Inspection Method

The same time as

Normal value

The same time as

Cycle

Filter discharge

The same time as

Observe whether there is any discharge in the discharge port

The same time as

There is normal

The same time as

daily

Filter built-in discharge valve cleaning

The same time as

Remove the discharge valve, neutral solution cleaning

The same time as

The same time as

weekly

Filter replacement

The same time as

Check the nitrogen machine timer 3000-4000 hours or so

The same time as

Replace the filter

The same time as

PSA nitrogen system

Oxygen analyzer: check the sampling gas and pressure, adjust the flow of moderate and pressure to 0.1MPa per quarter with air correction oxygen meter air oxygen content ≈ 21.0%

4. Note:

4.1. Before the start of the maintenance work, the entire system and the various parts of the system must be closed;

4.2. Before the start of the maintenance work, the system and piping must be completely depressurized;

4.3. The exhaust gas discharged from the system is concentrated oxygen, pay attention to fire safety, indoor air circulation;

Air compressor in the regular discharge of sewage valve.

Inspect the cold and dry machine.

Pay attention to observe the two adsorption tank pressure and pneumatic valve action is normal.

Note that the Oxygen Meter indicates whether the oxygen content meets the requirements.

Shutdown steps:

First turn the air compressor knob to no load, no-load operation after 2 minutes to close the air compressor.

Close the cold and dry machine.

Close the nitrogen generator, nitrogen outlet valve and sampling valve, turn off the nitrogen generator power switch.

The lower part of the air buffer tank is open to drain the oil and water in the tank.

Boot steps:

Open the air compressor, to be compressed air buffer tank pressure to 0.8MPa or more, open the control cabinet nitrogen switch, nitrogen tank adsorption tank pressure to 0.6MPa or so, observe the nitrogen system is working properly (according to the two adsorption tank Pressure change to judge).

Open the oxygen switch to the power switch, and adjust the amount of sampling flow, observe the oxygen content. According to the need to adjust the purity of nitrogen purity valve opening, the purity of qualified automatically switch into the nitrogen storage tank, nitrogen storage tank Nitrogen Gas Machine pressure is generally 0.6-0.8MPa or so.


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