Principle and structure of industrial oxygen generators

Industrial Oxygen GeneratorPrinciple: Industrial oxygen generators utilize the pressure swing adsorption (PSA) principle. High-quality zeolite molecular sieves serve as the adsorbent to extract oxygen from the air under a certain pressure. Purified and dried compressed air undergoes pressure adsorption and depressurization desorption in the adsorber. Due to aerodynamic effects, the diffusion rate of nitrogen in the micropores of the zeolite molecular sieve is far greater than that of oxygen, causing nitrogen to be preferentially adsorbed by the zeolite molecular sieve while oxygen is enriched in the gas phase to form the finished oxygen product. Then, after depressurization to normal pressure, the adsorbent desorbs the adsorbed nitrogen and other impurities, achieving regeneration.

Industrial oxygen generator systems typically have two adsorption towers: one tower for oxygen adsorption and the other for desorption and regeneration, controlled bya PLC (programmable logic controller) that controls the opening and closing of pneumatic valves, allowing the two towers to cycle alternately to achieve continuous production of high-quality oxygen. The entire system consists of the following components: compressed air purification module, air storage tank, oxygen-nitrogen separation device, and oxygen buffer tank; if cylinder filling is required, an oxygen booster and cylinder filling device are installed at the end.

　　Industrial Oxygen Generator Component Introduction:

　　1.Compressed Air Purification Component of the Industrial Oxygen Generator.

　　Compressed air supplied by the industrial oxygen generator's air compressor is first introduced into the compressed air purification component, where most of the oil, water, and dust are removed from the compressed air by pipeline filters. Then, the compressed air is further dehydrated by a refrigerant dryer, de-oiled and de-dusted by fine filters, and further purified by ultra-fine filters. Depending on the system operating conditions, a compressed air oil removal device is designed to prevent possible micro-oil penetration, providing sufficient protection for the molecular sieve. The carefully designed air purification module ensures the service life of the molecular sieve. The clean air processed by this component can be used as instrument air.

　　2.Industrial Oxygen Generator Storage Tank.

　　The function of the storage tank is to reduce airflow pulsation and provide a buffering effect; this reduces system pressure fluctuations, allowing compressed air to smoothly pass through the compressed air purification module for complete removal of oil and water impurities, reducing the load on the subsequent PSA oxygen-nitrogen separation device. At the same time, when switching adsorption tower operation, it provides a large amount of compressed air to the PSA oxygen-nitrogen separation device, quickly increasing the pressure in a short time to quickly raise the pressure in the adsorption tower to the operating pressure, ensuring reliable and stable operation of the equipment.

　　3.Industrial Oxygen Generator's oxygen-nitrogen separation device.

　　There are two adsorption towers, a and b, each containing special molecular sieves. When clean compressed air enters the inlet end of Tower A and flows through the molecular sieve to the outlet end, N2 is adsorbed, and the industrial oxygen generator product oxygen flows out from the outlet end of the adsorption tower. After a period of time, the molecular sieve in Tower A becomes saturated with adsorbed material. At this time, Tower A automatically stops adsorption, and compressed air flows into Tower B to adsorb nitrogen and produce oxygen, while the molecular sieve in Tower A regenerates. The regeneration of the molecular sieve is achieved by rapidly reducing the pressure in the adsorption tower to normal pressure to remove the adsorbed N2. The two towers alternately adsorb and regenerate to complete the oxygen-nitrogen separation and continuously output oxygen. All of the above processes are controlled by a programmable logic controller. When the set oxygen purity at the outlet end is reached, the PLC program activates, the automatic vent valve opens, and unqualified oxygen is automatically vented to ensure that unqualified oxygen does not flow to the gas consumption point. During venting, a silencer reduces the noise to below 75 decibels.