High purity oxygen gas generator

Principle

This Oxygen Generator is a machine producing high purity oxygen by separating oxygen from air. It adopts the principle of PSA(pressure swing adsorption).

Pressure swing adsorption(PSA) processes rely on the fact that under pressure, gases tend to be attracted to solid surfaces, or "adsorbed". The higher the pressure, the more gas is adsorbed; when the pressure is reduced, the gas is released, or desorbed. PSA processes can be used to separate mixed gases because different gases tend to be attracted to different solid surfaces. When air is passed under pressure through a vessel containing an adsorbent(zeolite molecular sieve) bed that absorbs nitrogen more strongly than it absorbs oxygen, part or all of the nitrogen will stay in the bed, and the gas coming out of the vessel will be enriched in oxygen. When the bed reaches the end of its capacity to adsorb nitrogen, it can be regenerated by reducing the pressure, thereby releasing the adsorbed nitrogen. It is then ready for another cycle of producing oxygen enriched air. In this way, high purity oxygen is produced.

A complete cylinder filling  oxygen generator consists of: Air Compressor, PSA oxygen generator, storage tank,Oxygen Compressor and cylinder filling station,etc.

This photo is for explanation only, real machine structure will be based on flow rate and site space,etc.

Parts explanation

Air compressor

Function:Provides compressed air source for the PSA oxygen generation part, the flow and pressure are to be decided by the desired oxygen flow rate, purity, outlet pressure. As it is the air source of whole system, the performance of air compressor has remarkable influence to the whole oxygen generator system.

Function: Separating oxygen from compressed air supplied by air compressor, achieving desired purity, flow rate and outlet pressure.

This product includes: compressed air treatment part, air tank, oxygen separator and oxygen buffer tank.

Compressed air treatment part

Function: get rid of water, oil, impurities in compressed air coming from the air compressor, providing clean, dry, oil-free compressed air for the PSA oxygen separator.

Compressed air first passes through one filter, then one dryer, then two filters, and at last one activated carbon oil remover. After treated by these parts, the dew point of compressed air can reach -20 degree (normal pressure) , dust content is not larger than 0.01mg/m3, solid particles diameter is not larger than 0.01μ, oil mist content is not more than 0.003mg/m3.

Air tank

Air tank function:

It quickly increases the pressure of adsorber;

It also stores gas for air compressor, buffers system pressure；

O2 separator

Function:

It is the key part of whole system. In this part, the oxygen is separated from compressed air, sent to buffer tank as produced gas. Nitrogen, carbon dioxide, argon,etc are discharge from muffler as exhausted gases. The efficiency of whole oxygen generator system is mainly decided by the adsorption tower structure, air distribution structure, molecular sieve performance, gas process flow, etc.

Oxygen buffer tank

Function:

It balances pressure fluctuation, ensure stable oxygen supply;

With oxygen re-blowing system, the O2 buffer tank can also quickly increases the pressure of adsorption towers.

Oxygen storage tank

Function:

It balances pressure fluctuation, ensure stable oxygen supply to downstream oxygen purifier

Oxygen compressor

Function:

Oxygen filling station

This filling station is used to connect cylinders, storing the high pressure oxygen coming from oxygen compressor. Filling position qty is decided by flow rate and customer specific need.