Pressure Swing Adsorption (PSA) Oxygen Production Principle
Pressure swing adsorption oxygen production relies on zeolite molecular sieve as the adsorbent. By leveraging the principles of pressure adsorption and pressure desorption, it selectively adsorbs nitrogen from the air and releases it, thereby separating oxygen. Zeolite molecular sieve is a spherical granular adsorbent processed through a specialized pore - formation treatment. Its surface and internal structure are densely packed with micropores, which enable the kinetic separation of oxygen and nitrogen.
The separation mechanism is based on the subtle difference in the kinetic diameters of oxygen and nitrogen molecules. Nitrogen molecules diffuse more rapidly through the micropores of zeolite, while oxygen molecules have a slower diffusion rate. Water and carbon dioxide in compressed air exhibit a diffusion behavior similar to that of nitrogen. As a result, oxygen molecules become concentrated in the adsorption tower.
Advantages and Features of Oxygen Generators
Oxygen generators produce gaseous oxygen directly from compressed air on - site, presenting a cost - efficient, reliable, and safe alternative to traditional oxygen supply methods, such as oxygen cylinders or cryogenic liquid storage.
The Oxywise Oxygen Generator series offers 40 standard models, with capacities ranging from 1 to 200 Nm³ per hour and oxygen purity levels between 90 - 99%. These generators are engineered for continuous 24/7 operation. Each unit is equipped with an automatic start - stop function, allowing it to initiate and halt operation in accordance with oxygen consumption requirements.
Oxygen Generating and Filling Stations
When an oxygen generator is integrated with an oxygen high - pressure compressor for cylinder filling, it forms an Oxygen Generating and Filling Station. This system encompasses essential components like an air compressor, dryer, and filtration units. Standard features include molecular sieve protection, stainless - steel piping, and other advanced attributes, ensuring efficient and safe operation for oxygen production and filling processes.
The technical features of the oxygen generator after PSA are as follows
(1) Imported PLC control system and imported pneumatic angle seat valve with switching life up to 3 million times are adopted to ensure the continuous and reliable operation of the device.
(2) Imported PLC intelligent controller, easy to operate, stable operation, high degree of automation. Can choose touch screen control system, computer industrial control system.
(3) Reasonable internal components, uniform airflow distribution, reduce the impact of high-speed airflow.
(4) Special molecular sieve protection measures extend the service life of zeolite molecular sieve.
(5) The automatic interlock oxygen emptying device ensures the oxygen quality of the product.
(6) The operation of the whole machine can be: depending on the organic combination of advanced oxygen production process design, scientific gas distribution structure, adsorption tower with compound bed structure, unique molecular sieve filling process, unique molecular sieve protection measures and automatic compression compensation device of cylinder, it is conducive to the long-term use of oxygen molecular sieve.
process flow chart for reference only
Compressed air pretreatment
The molecular sieve in the main oxygen generator has stringent requirements for the quality of compressed air. Compressed air typically has elevated temperatures and contains significant amounts of water, dust, and oil mist. To ensure the proper functioning of the oxygen generator, it is essential to remove water, oil, and dust from the compressed air before it enters the oxygen generator. This is precisely the purpose of the relevant equipment.
The purification of compressed air cannot be overstated, as it directly impacts the lifespan of the molecular sieve and, consequently, the long - term efficient operation of the oxygen generator.
For water removal from compressed air, adsorption dryers or freezing dryers are commonly employed. To remove oil, water, and dust, various multi - stage filters with different filtration accuracies are utilized. Generally, oil - free air compressors require one or two - stage filters, primarily for dust and water removal. In contrast, oil - lubricated air compressors necessitate three or four - stage filters to effectively remove oil, water, and dust.
In environments with high humidity, it is advisable to install a dedicated blowdown tank. This tank is designed to filter out the substantial amount of water vapor present in the compressed air, further enhancing the overall purification process.
|
Oxygen flow
|
1~200Nm3/h |
Oxygen purity
|
30%-98% |
Oxygen dew point
|
≤-45ºC |
Export pressure
|
0.1~0.8Mpa |
In order to get access easily for the O2 continuously for the hospital, an onsite PSA oxygen generation system is a fast response and convenient solution.
A PSA oxygen generation system for ONLY one-time investment, costing merely for the simply maintain and the electricity fee to generate the O2 gas by yourself.
The outlet pure O2 gas can supply both of the pipes and the cylinder filling applications.
1.What is the purity of the PSA oxygen machine?
The average PSA oxygen machine is 90%-93% pure.
Our PSA oxygen machine can reach 95%,98%,up to 99%.
2.How should PSA oxygen machines be maintained?
The daily maintenance of PSA oxygen machines is straightforward:
- Air Compressor Maintenance: Regularly service the air compressor. Pay close attention to air filtration and oil - related aspects. Replace the oil according to the manufacturer's instructions. This ensures the compressor operates efficiently and prolongs the lifespan of the oxygen machine.
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