Pressure swing adsorption oxygen production equipment

Process principled

Pressure swing adsorption oxygen production equipment (also known as PSA oxygen production equipment) uses PSA special molecular sieve to selectively adsorb impurities such as nitrogen, carbon dioxide, and water in the air under normal temperature and pressure conditions to obtain higher purity oxygen (93 %±2).

Since the pressure swing adsorption oxygen production equipment entered industrialization, the technology has developed rapidly. Because of its price-performance ratio in the low-to-medium output range and the occasions where the purity requirements are not high, it has strong competitiveness, so it is widely used in steel-making fluxing. , Blast furnace oxygen enrichment, pulp bleaching, glass furnace, wastewater treatment, and other fields.

Domestic research on this technology started earlier, but the development has been relatively slow for a long period of time. Since entering the 1990s, the superiority of PSA oxygen generation equipment has been gradually recognized by the Chinese people. In recent years, various process equipment has been put into production one after another. Click here to learn about small oxygen generators for home use.

Process Description

The oxygen production system is mainly composed of an air compressor, air cooler, an air buffer tank, a switching valve, an adsorber and an oxygen balance tank. After the raw material air passes through the suction port filter to remove the dust particles, it is pressurized to 3~4barg by the air compressor and enters one of the adsorbers.

The adsorber is filled with adsorbent, in which moisture, carbon dioxide, and a small number of other gas components are adsorbed by the activated alumina at the bottom of the adsorber, and then nitrogen is adsorbed by the zeolite molecular sieve filled on the upper part of the activated alumina.

The oxygen (including argon) is a non-adsorbed component and is discharged from the top outlet of the adsorber as product gas to the oxygen balance tank. When the adsorber is adsorbed to a certain level, the adsorbent in it will reach saturation. At this time, the adsorbent is vented through the switching valve, and the adsorbed water, carbon dioxide, nitrogen, and a small number of other gas components are discharged to the atmosphere, and the adsorbent is regenerated.

Each adsorber of PSA performs the following steps alternately:
---Adsorption---Desorption---Stamping
The above three basic process steps are automatically controlled by PLC and switching valve system.

Application field

Metallurgical electric arc furnace steelmaking, blast furnace iron making and oxygen enrichment, shaft furnace oxygen-enriched combustion, non-ferrous smelting industry, lead smelting, copper smelting, zinc smelting, aluminum smelting, various furnaces, oxygen-enriching environmental protection industry drinking water treatment, wastewater treatment, pulp bleaching, Waste biochemical treatment, various oxidation reactions in the chemical industry, ozone production, coal gasification and other industrial fermentation, cutting, glass furnaces, air conditioners, garbage incineration, oxygen inhalation bars in the medical industry, oxygen therapy, sports health care, aquaculture, freshwater aquaculture.

PSA oxygen generator features

1. The unit is simple, and the moving equipment is only an air compressor and a cooler. 2. The requirement for molecular sieve is relatively low, and with the same oxygen production equipment, the molecular sieve consumption is small. 3. The equipment is small in size, so its cost is relatively low. 4. The requirements for the degree of automation of the entire equipment are relatively low. The air compressor, freeze dryer/condenser can be started and stopped separately from the oxygen generator or can be linked to control.