How to deal with the problems of air leakage and purity decline in the liquid nitrogen system

The liquid nitrogen system uses ultra-high molecular weight permeable membrane separation technology and an effective dehumidification device, which reduces the original humidity and can automatically discharge moisture after shutdown. The dehumidification and two-stage adsorption of the metal polymer used by it can greatly improve the purity of nitrogen. In addition to the two-stage catalysis in the electrolytic cell, there is also a third-pole catalysis. The catalyst uses a new type of precious metal, so that the nitrogen content of the output nitrogen is less than 3ppm, and is equipped with an installation device, which is sensitive and reliable.
When the pressure of the liquid nitrogen system does not reach the set value, the flow meter should be observed first. If the flow display is larger than usual, it can basically be judged that the entire system has a leak point. Treatment method: turn off the power, remove the gas path, seal the nitrogen outlet with a sealing nut, turn on the power, see if the pressure can reach the set value, and see if the flow display can reach "000", if the flow display can return to zero , Indicating that there is no air leakage in the instrument itself, at this time, it is necessary to check the pipeline after the gas outlet, and whether the gas equipment leaks. If the flow rate display cannot return to zero, there is a leak point in the instrument. Please use soap liquid to check if there is a leak in the drying tube.
The following editors will discuss with you the issue of the decrease in the purity of nitrogen produced by the liquid nitrogen system. There are roughly the following reasons:
1. After the carbon molecular sieve expires, the quality of the carbon molecular sieve will deteriorate and the purity of the nitrogen gas will be lower after the equipment is used for a long time. The purity can be restored by replacing the new carbon molecular sieve.
2. If the flow rate is too high, the originally customized purity and flow rate of the device will decrease if the flow rate is increased, and the purity will increase if the flow rate is low. It is recommended not to adjust the flow rate by yourself.
3. Solenoid valve failure. The solenoid valve is the main principle of the control adsorption type. Failure of the solenoid valve can lead to insufficient gas production and reduced purity.
The above is all the knowledge information that Xiaobian brings to everyone today, I hope it can help you.