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PSA oxygen generator works

PSA oxygen generator based on zeolite molecular sieve adsorbent, the use of compressed air in the molecular sieve of oxygen, ammonia in the surface adsorption amount of the difference, through the pressure adsorption, pressure reduction desorption principle directly from the compressed air to prepare oxygen fully automatic equipment. According to the principle of variable pressure adsorption, zeolite molecular sieve is used as the adsorbent, due to the nature of zeolite molecular sieve with selective adsorption, ammonia is adsorbed by zeolite molecular sieve in large quantities, oxygen in the gas phase is enriched to achieve oxygen separation of ammonia under the effect of variable pressure adsorption (psa). The process uses a double adsorption tower, one tower adsorbs oxygen and the other tower desorbs and regenerates it. The PLC intelligent process controls the opening and closing of the pneumatic angle seat valve to make two cycles, continuously outputting high quality oxygen.

Introduction to the features and functions of oxygen concentrators

The adsorption tower adopts the advanced combined coconut pad compression technology, which enters the working state from the beginning of the oxygen generator, and always ensures the molecular sieve compression in the working state, and at the same time does not break the molecular sieve, avoiding the pulverisation of the molecular sieve caused by the high-speed impact of the airflow. The compression device is more reliable and easy to maintain compared to spring compression, cylinder compression and airbag compression devices. The advanced lotus-shaped component design fully considers and avoids the high-speed impact of gas on the molecular sieve in the adsorption process, avoiding the pulverisation of the molecular sieve caused by the high-speed impact of airflow, and avoiding the leakage and jamming of the valve caused by the pulverised powder entering the pipe and valve. The professional blizzard combination filling technology makes the molecular sieve filling more uniform and dense, ensuring that the molecular sieve in the adsorption process does not produce fluidization state, without regular replenishment of expensive molecular sieve.

Principle of Variable Pressure Adsorption

PSA oxygen system mainly consists of air compressor, filter, air cooler and dryer, air buffer tank, activated carbon filter, oxygen host, oxygen storage tank, sterilization filter, oxygen booster, tank valve set and so on. The raw air is pressurised to 0.5Mpa by the air compressor after the dust particles have been removed by the inlet filter, firstly by the filter to remove the small amount of oil trapped in the compressed air when the air compressor is first switched on and then by the air cooler and dryer to condense and remove the water, then by the suction dryer and activated carbon filter to enter an adsorber in the oxygen production mainframe. The adsorber is filled with adsorbent, in which water, carbon dioxide and a small amount of other gas components are adsorbed at the entrance of the adsorber by the activated alumina filled at the bottom, and then ammonia is adsorbed by the molecular sieve filled at the top of the activated alumina. The non-adsorbed components of oxygen are discharged as product gas from the top outlet of the adsorber to the oxygen balance tank, where they are increased to the required oxygen pressure by the oxygen compressor and fed to the subsequent oxygen section. When the adsorbent in one of the adsorbers of the main oxygen plant has reached a certain level, the adsorbent will be saturated and the adsorbent will be regenerated by emptying the adsorbent through the switching valve and discharging the adsorbed water, carbon dioxide, ammonia and a small amount of other gas components to the atmosphere. The four basic process steps are controlled automatically by a PLC and a switching valve system to produce a stable product of oxygen, which is exported to a booster via an oxygen storage tank and then tank-filled.

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