VPSA oxygen generator for medical use

Process Description 

VPSA Oxygen Generator, which is under the condition of atmospheric pressure, using special adsorbent ( macular sieve, and activated alumina) selective adsorption characteristics, preferential adsorption impurities such as nitrogen, carbon dioxide and water in the air, then obtain high purity oxygen under the condition of pressure. Under the condition of reduced pressure, stripping adsorbent nitrogen and other impurities, the regeneration of adsorbent. Two towers (or more) cycle work, adsorption - stripping cycle operation, so as to realize continuous production purity 90-95% oxygen.

Vacuum pressurized adsorption desorption (VPSA) oxygen producing equipment, which means through atmospheric pressure conditions, the use of special molecular sieve adsorption selectivity VPSA impurities such as nitrogen, carbon dioxide and water in the air, under the condition of vacuum desorption of molecular sieve to circulately obtain high purity of oxygen (90 ~93%).

This set of VPSA Oxygen Generator equipment adopts the flow of low-pressure adsorption vacuum desorption towers, low energy consumption, high efficiency.

Power equipment selection roots blower and the roots vacuum pump and piston oxygen compressor.

Use the high- efficient oxygen molecular sieve, having high utilization rate, low energy consumption. We can guarantee the using life will be more than 10 years.

Use patented technology mechanical pressing device, ensure that the molecular sieve no move in the adsorber tank, avoid molecular sieve getting into powder.

In control system, using PLC control cabinet with a machine control mode, automatic, with single bound to achieve automatic parking. PC will control parking control, process according to the parameters display alarm. And also set up start, stop and emergency button.

Imported stainless steel high performance butterfly valve, double eccentric, PTFE seals, this kind of valve cooperate with our company’s long working time process, we can guarantee the service life of valve body more than 3 years. We have a record that have used of this valve for 6 years without maintenance.

Simplified Flow Sheet 

The VPSA oxygen generator flow sheet is air inlet air-blower through filter and blow in the bottom of adsorption tank. Activated alumina is loaded in the bottom of the beds. It can be used to remove water and carbon dioxide in air to avoid poisoning of molecular sieve.

Molecular sieve is loaded on top of the beds, when air blows through the fixed beds of molecular sieve, nitrogen diffuse into molecular sieve by the adsorption force, oxygen and argon enter into buffer tank from interspace of the beds.

Oxygen Compressor is connected with buffer tank and compresses oxygen to the required pressure, and delivers to storage tank for consumption.

After adsorption for period of time, molecular sieve is saturated with nitrogen. The air-inlet valve is then closed. Enriched-oxygen is used to purge the other vacuumized tank. When the pressure reduce to a certain value, shut equalization valve, in the mean time open the valve for vacuum 

pump and vacuumize the beds. When reach a certain vacuum level, purge molecular sieve using enrich-oxygen from the other tank and some gas in buffer tank to complete the desorption cycle.

When the desorption cycle is finished, increase pressure of bed using the gas. When the pressure reach a lower vacuum degree, shut buffer tank valve and open the valve of air-blower and prepare for the next cycle.

Product Categories : Oxygen Generator > VPSA Oxygen Generator