Nitrogen machine purity is not going up, the drop is not up to standard solution

There are two major problems in the purity of nitrogen generators .

First, online detection of nitrogen analyzer oxygen probe aging, detection data is incorrect

Second, the nitrogen generator system itself has many faults resulting in insufficient purity of nitrogen.

Insufficient purity of the nitrogen generator In addition to the inaccurate measurement data of the P860 nitrogen analyzer, the main problem is derived from the nitrogen generator itself. The company specializes in the maintenance and maintenance of nitrogen generators for many years, summarize the following points and make corresponding countermeasures as follows

Third, the nitrogen flow exceeds the design capacity of the nitrogen generator. Some customers have adopted the idea of ​​just enough nitrogen generator capacity in order to save equipment purchase investment. As a result, the demand for the production line increases and the nitrogen flow rate does not increase. high.

4. Due to the poisoning of the carbon molecular sieve of the nitrogen generator, the adsorption capacity of the carbon molecular sieve decreases. The so-called nitrogen generator carbon molecular sieve poisoning refers to the fact that the use of the manufacturer fails to maintain the air degreasing and dewatering system in time, causing the oil to enter the adsorption tower of the nitrogen generator, and the oil will block the carbon molecular sieve adsorption chamber and cannot adsorb the oxygen molecules. Therefore, the nitrogen gas finally coming out of the flow meter has a high oxygen content. At this moment, the user should replace the air filter element, the automatic drain valve and the deoiled activated carbon in time with the production needs. The most important thing is to replace the nitrogen generator adsorbent to restore the normal nitrogen production capacity.

Fifth, the adsorption pressure problem. The preferred adsorption pressure of carbon molecular sieve is above 0.65mpa to 0.85mpa. If the adsorption pressure of carbon molecular sieve is lower than that of normal nitrogen generator, it is impossible to produce nitrogen normally. What is the reason for the low adsorption pressure of nitrogen generator? Some customers will It is considered that air supply is insufficient for air compressors. In fact, this is only one of the important reasons. Another important reason for hiding is the pneumatic valve valve of the nitrogen generator. The so-called cross gas is the pneumatic valve. For some reasons, the sealing material wears out, the pneumatic valve of the nitrogen generator is not tight, and a large amount of air is discharged, so the adsorption pressure Not coming up.

The purity of the nitrogen generator is not up to standard

1, the flow is too high

The original purity and flow rate of the nitrogen generator will decrease if the flow rate is increased, and the purity will increase if the flow rate is low. It is recommended that the flow rate not be adjusted by itself.

Second, carbon molecular sieve expired

If the nitrogen generator is used for a long time, the quality of the carbon molecular sieve will be deteriorated, and the purity of the produced nitrogen will be low. The carbon molecular sieve needs to be replaced, and the purity can be recovered. Notes on the need for maintenance after the use of a nitrogen generator for a certain number of years. Many customers have reported that after a certain number of years of use of the nitrogen generator, gas production is insufficient, the purity of the nitrogen generator is reduced, and the nitrogen generator is sprayed.

Third, the solenoid valve failure

The solenoid valve is the main principle of controlling the adsorption type. The failure of the solenoid valve can lead to insufficient gas production and decreased purity.