Introduction to the working principle and maintenance method of laboratory nitrogen generator

　　The laboratory nitrogen generator is the compressed air that enters the refrigeration dryer to cool and dehydrate after being compressed, and then passes through the filter to remove oil and dust, and then enters the adsorption tower equipped with carbon molecular sieve to selectively adsorb oxygen, carbon dioxide and other impurity gas components , Produce high-purity nitrogen.
　　The working principle of the laboratory nitrogen generator can be roughly divided into three types: a combination of electrochemical separation and physical adsorption; separation using hollow fiber membranes and separation using gas chromatography technology with new synthetic molecular sieves.It uses high-quality carbon molecular sieve as the adsorbent according to the principle of pressure swing adsorption, and produces nitrogen from the air under a certain pressure. The purified and dried compressed air is adsorbed under pressure and desorbed under reduced pressure in the adsorber. Using the dynamic effect, the diffusion rate of oxygen in the micropores of the carbon molecular sieve is much greater than that of nitrogen. When the adsorption is not balanced, nitrogen is absorbed in the gas phase. Enriched to form finished nitrogen.
　　In the process of using the laboratory nitrogen generator for a long time, we must pay attention to maintenance, so as to extend the effective life of the equipment. The following editor will introduce the maintenance methods of the equipment:
　　1. Carbon molecular sieve is the core of the laboratory nitrogen generator. In order to prevent it from being contaminated and losing its effect, the oil content of the air compressor exhaust must be strictly controlled, and the activated carbon in the precision filter element and the high efficiency deoiler replace.
　　2. The laboratory nitrogen generator is in operation. When a large amount of black dust is sprayed from the vent of the muffler, it should be shut down in time to find the cause to avoid more serious carbon molecular sieve powdering.
　　3. Regularly check the pressure gauge of the compression cylinder. If there is no pressure or the pressure drops during the desorption process, it means that the cylinder can no longer compress the carbon molecular sieve normally, and the fault should be eliminated in time to prevent the carbon molecular sieve from being compressed and moving and causing molecular sieve powder. Due to interstitial reorganization or normal loss of carbon molecular sieve, when a carbon level alarm occurs, stop the machine immediately to add carbon molecular sieve. The storage, transportation, loading and unloading of carbon molecular sieve will not be harmful to the human body. When filling carbon molecular sieve, you can wear goggles, breathing filter and use an exhaust fan. After filling, wash the skin contact with soap.