ZBN Nitrogen generator
Principle of PSA pressure swing adsorption nitrogen making machine
Hangzhou Poly air separation equipment manufacturing Co., Ltd. is based on the principle of pressure swing adsorption, using high quality carbon molecular sieve as an adsorbent, under a certain pressure, the production of nitrogen from the air. After purification of dry compressed air, the pressure of adsorption and desorption in vacuum adsorber. Due to the aerodynamic effect, oxygen diffusion rate in the carbon molecular sieve is much larger than that of nitrogen, and the oxygen is preferentially adsorbed by the carbon molecular sieve, and nitrogen is enriched in the gas phase. And then the pressure was reduced to normal pressure, and the adsorbent was attached to the oxygen and other impurities. General settings in the system of two adsorption towers, one tower of nitrogen adsorption capacity, the other tower desorption regeneration, through the PLC program controller to control gas valve opening and closing, so that the two towers cycle, in order to achieve continuous production of high-quality nitrogen purposes. The whole system consists of the following components: compressed air purification module, air storage tank, oxygen nitrogen separation device, nitrogen buffer tank.
1, compressed air purification components
The air compressor to provide compressed air first pass into the compressed air purification components, compressed air from the pipe filter to remove most of the oil, water, dust, the freeze dryer further addition of water, fine filter oil, dust, and followed by in ultra precision filter for deep purification. According to the system condition, the air separation system of the air is designed for a set of compressed air oil removing device, which is used to prevent the possibility of micro oil penetration and provide sufficient protection for the carbon molecular sieve. Strict design of air purification components to ensure the service life of carbon molecular sieve. After being treated by the component, the clean air can be used for instrument air.
22, air storage tank
The air tank is to reduce the flow pulsation, buffer; thereby reducing the pressure fluctuation in the system, so that the compressed air smoothly through the compressed air purification components, in order to fully remove the water impurities, reduce subsequent PSA oxygen nitrogen separation unit load. At the same time, in the absorption tower to switch, it also provides a short time quickly boost for the large number of compressed air for PSA oxygen nitrogen separation device, the adsorption tower pressure quickly rise to the pressure of work, ensure the equipment reliable and stable operation.
3, oxygen and nitrogen separation device
The adsorption tower with special carbon molecular sieve is A and B. When the clean compressed air enters the A tower inlet and flows through the carbon molecular sieve to the outlet end, O2, CO2 and H2O are adsorbed, and the nitrogen gas is flowed out from the outlet end of the adsorption tower. After a period of time, carbon molecular sieve adsorption tower A. At this time, A tower automatic stop adsorption, compressed air flow into the B tower for oxygen production of nitrogen, and A tower molecular sieve regeneration. The regeneration of the molecular sieve is realized by the rapid descent of the adsorption tower to the atmospheric pressure to remove the adsorbed O2, CO2 and H2O. Two columns were alternately adsorbed and regenerated to complete the separation of oxygen and nitrogen, and the continuous output of nitrogen. The above process is controlled by the programmable logic controller (PLC). When the outlet end of the purity of nitrogen size set value, PLC program, automatic vent valve is opened, the unqualified automatic nitrogen emptying, ensure that the unqualified nitrogen gas does not flow. The gas vent when using the engine muffler noise is less than 75dBA.
4, nitrogen buffer tank
The nitrogen buffer tank is used for balancing the pressure and the purity of the nitrogen separated from the nitrogen oxygen separation system to ensure the continuous supply of nitrogen stable. At the same time, in the absorption tower to switch, it will itself part of the gas to charge the adsorption tower, absorption tower hand help boost, but also play a role in protecting the bed, play a very important role in the process of auxiliary equipment in the work process.
Technical index of nitrogen making machine:
Flow: 3-1000Nm/h Purity: 95%-99.9995%
The dew point: less than -40 DEG C: adjustable pressure is less than 0.6Mpa
Technical characteristics of nitrogen making machine
1 reasonable internal components, air distribution uniformity, to reduce the impact of the high speed of the air.
2 improve the process design, the use of the best results.
3 unique molecular sieve protection measures to extend the life of carbon molecular sieve.
4 intelligent interlocking unqualified nitrogen gas equipment to ensure product quality.
5 optional nitrogen flow rate, automatic control system, remote control system.
6 easy to operate, stable operation, high degree of automation, can achieve unmanned operation.
Scope of application of nitrogen making machine:
Metal heat treatment process of protective gas, nitrogen gas and various types of tanks, chemical industry pipeline gas purification, rubber, plastic products manufacturing, food industry exhaust oxygen fresh-keeping packaging, beverage industry and cover gas purification, pharmaceutical industry nitrogen nitrogen charged packaging and container oxygen exhaust, electronic components and electronic production the semiconductor industry process and protective gas. The purity, flow and pressure can be adjusted to meet the needs of different customers.