1. Compressed air purification unit
The compressed air provided by the air compressor is firstly passed into the compressed air purification unit. Most of the oil, water and dust are removed from the compressed air by the pipeline filter, and then the water, oil and dust are further removed by the freeze dryer, and the ultra fine filter is followed by the deep purification. According to the working conditions of the system, a set of compressed air degreaser is specially designed for chenrui air separation gas to prevent possible micro oil penetration and provide sufficient protection for carbon molecular sieve. The rigorous design of air purification components ensures the service life of carbon molecular sieve. The clean air treated by the module can be used for instrument air.
2. Air storage tank
The function of the air storage tank is to reduce the air flow pulsation and act as a buffer, so as to reduce the system pressure fluctuation and make the compressed air pass through the compressed air purification unit smoothly, so as to fully remove the oil and water impurities and reduce the load of the subsequent PSA oxygen and nitrogen separation device. At the same time, when the adsorption tower is switching, it also provides a large amount of compressed air for PSA oxygen and nitrogen separation device to boost pressure rapidly in a short time, which makes the pressure in the adsorption tower rise to the working pressure quickly and ensure the reliable and stable operation of the equipment.
3. Oxygen and nitrogen separation unit
There are a and B adsorption towers equipped with special carbon molecular sieve. When the clean compressed air enters into the inlet end of tower a and flows through the carbon molecular sieve to the outlet end, the nonmetal expansion joint, O2, CO2 and H2O are absorbed by the non-metallic expansion joint, and the product nitrogen flows out from the outlet end of the adsorption tower. After a period of time, the adsorption of carbon molecular sieve in tower a is saturated. At this time, tower a automatically stops adsorption, compressed air flows into Tower B for oxygen absorption and nitrogen production, and molecular sieves of tower a are regenerated. The regeneration of molecular sieve is realized by rapidly lowering the adsorption tower to atmospheric pressure to remove adsorbed O2, CO2 and H2O. The adsorption and regeneration of the two towers are carried out alternately to complete the separation of oxygen and nitrogen, and the nitrogen is continuously output. All the above processes are controlled by PLC. When the purity of nitrogen at the outlet is set, the PLC program will open the automatic vent valve to vent the unqualified nitrogen automatically to ensure that the unqualified nitrogen does not flow to the gas consumption point. When the gas is vented, the noise is less than 75dBA by muffler.
4. Nitrogen buffer tank
Nitrogen buffer tank of nitrogen generator is used to balance the pressure and purity of nitrogen separated from nitrogen and oxygen separation system to ensure the stability of continuous nitrogen supply. At the same time, after the working switch of the adsorption tower, it will recharge part of its own gas to the adsorption tower, on the one hand, it helps the adsorption tower to boost pressure, on the other hand, it also plays a role in protecting the bed, which plays a very important auxiliary role in the process of equipment operation.
Application range of nitrogen generator:
Protective gas for metal heat treatment process, chemical industry production gas and nitrogen filling and purification of various storage tanks and pipelines, production gas for rubber and plastic products, oxygen discharging and fresh-keeping packaging for food industry, purification and covering gas for beverage industry, nitrogen charging and oxygen discharging for packaging and containers in pharmaceutical industry, protective gas for electronic components and semiconductor production process in electronic industry, etc. The purity, flow and pressure are stable and adjustable to meet the needs of different customers.
On 2018-08-08 11:45:46
