Reasons and solutions for purity decline of nitrogen making machine

For the high purity of nitrogen, it is generally necessary to reach 99.9% ~ 99.99%, that is, the national standard of oxygen-free requirements; The nitrogen production machine can maintain constant pressure supply in the production process to ensure the normal operation of production; Nitrogen does not contain dust and heat source and can be used for injection potting.

In general, when nitrogen is taken by the nitrogen production mechanism, the reasons for the decline in nitrogen purity are:

1, the adsorption pressure of the nitrogen machine is unstable, such as too high, more than 0.8Mpa or too low adsorption pressure, less than 0.6Mpa.

2. There is too much water and oil in the gas source

3, the outlet part of the interface leakage

4. The pressure of air intake rises too fast

5, nitrogen machine molecular sieve poisoning

The solution measures that can be taken are as follows to improve the purity of nitrogen making machine:

1, reduce the air pressure, increase the intake pressure

2. Add a storage tank to the air intake

3. Remove and reinsert

4. Replace the molecular sieve

5. Adjust the inlet regulating valve of the nitrogen machine to reduce the intake volume, and install an oil-water separator before the inlet

According to the above points, the overall idea of our company for the whole program is as follows:

1, from the existing nitrogen technology level and economic considerations, this program is the use of pressure swing adsorption (PSA) nitrogen, the adsorption material selected Japan Takeda high-performance carbon molecular sieve, directly from the compressed air separation of purity ≥99.99%, (non-oxygen content specified in the national standard) nitrogen. The composition of the equipment is simple, the equipment covers less area, the operation and maintenance are simple, and the failure rate is low. And the energy consumption is low, the equipment operating cost is low.

2, in order to ensure the long-term, stable and normal operation of the PSA nitrogen machine, the compressed air must be cleaned before entering the nitrogen machine, such as dust removal, water removal, oil removal and other purification treatment, in order to meet the nitrogen machine's requirements for the quality of compressed air. Therefore, in the choice of dry machine and filter, we choose well-known domestic brands to ensure the stable and long-term operation of the whole system.

3, in order to ensure the long-term and reliable operation of the complete nitrogen system, the main components of our PSA nitrogen machine, such as molecular sieve, valves, controllers, etc., are imported from well-known brands. To ensure the equipment quality and safe, long-term, reliable operation of the whole system.

4, pressure swing adsorption nitrogen production is characterized by a certain relationship between nitrogen flow and purity, the higher the flow rate used, the lower the purity of nitrogen; The lower the flow rate used, the higher the purity of nitrogen. The user can adjust the flow and purity according to the use.

5, the operation of the equipment is controlled by PLC, the equipment automatically runs, and produces qualified nitrogen. The equipment is easy to operate and can be unattended.