Advanced Innovative VPSA Oxygen Generators Environmentally-Friendly

VPSA Oxygen Generators With Flexible Adjustment Of Oxygen Production To Meet Different Scales And Needs

Working Principle Description:

The working principle of a VPSA (Vacuum Pressure Swing Adsorption) oxygen generator that allows for flexible adjustment of oxygen production is as follows:

Adsorption Stage: The process begins with the adsorption stage, where compressed air is fed into the adsorber unit. Inside the adsorber, a specialized adsorbent material selectively adsorbs nitrogen molecules while allowing oxygen molecules to pass through. As a result, the adsorbent bed becomes enriched with oxygen, while nitrogen is retained.

Pressure Equalization: After a certain duration of adsorption, the adsorber enters the pressure equalization phase. In this phase, the pressure in the adsorber is balanced with another adsorber unit, which is in the desorption phase. This equalization allows for efficient gas transfer between the adsorbers.

Desorption Stage: In the desorption stage, the pressurized adsorber unit is depressurized, typically by reducing the pressure or evacuating the adsorber. This causes the adsorbed nitrogen to desorb from the adsorbent, resulting in a nitrogen-rich gas stream. The desorbed nitrogen is discharged as waste or redirected for other applications.

Purge Stage: Following desorption, the adsorber enters the purge stage. During this phase, a portion of the produced oxygen is redirected into the adsorber to purge any remaining traces of nitrogen. This purging process helps ensure high-purity oxygen output.

Cycling and Control: The adsorber units in a VPSA oxygen generator operate in cycles, with each unit going through adsorption, pressure equalization, desorption, and purge stages. Multiple adsorber units are employed to enable continuous oxygen production. The cycling and control system of the VPSA oxygen generator allows for flexible adjustment of the oxygen production rate by varying the number of adsorber units in operation and the duration of each cycle.

By adjusting the number of adsorber units and the cycle time, the oxygen production rate can be flexibly regulated to match the specific oxygen demand. This feature makes VPSA oxygen generators highly adaptable to different applications and allows for efficient utilization of resources while meeting varying oxygen requirements.

Specifications:

Product Advantages:

The flexibility to adjust the oxygen production rate of a VPSA (Vacuum Pressure Swing Adsorption) oxygen generator is reflected in the following aspects:

Adjustable cycle time: VPSA oxygen generators employ a cyclic operation to separate oxygen and nitrogen through adsorption. The cycle steps can be adjusted in terms of time to flexibly control the oxygen production rate. Shortening the adsorption and desorption stages increases the oxygen production speed and output, while lengthening these stages reduces the production rate.

Control of gas inlet and outlet valves: VPSA oxygen generators are typically equipped with multiple inlet and outlet valves to regulate gas flow. By adjusting the opening degree and duration of these valves, the flow rates of oxygen and nitrogen can be controlled, thereby adjusting the oxygen production rate.

Adjustment of adsorbents: VPSA oxygen generators utilize adsorbents, usually molecular sieves, to adsorb nitrogen and enrich oxygen. By modifying parameters such as the type of adsorbent, its quantity, and the adsorption temperature, the adsorption performance can be altered to adjust the oxygen production rate.

Adjustment of operational parameters: VPSA oxygen generators have adjustable operational parameters, including feed pressure, adsorption temperature, desorption temperature, etc. These parameters can be modified through the control system. By changing these operational parameters, the oxygen generator can be optimized to achieve the desired oxygen production rate.

It is important to note that the flexibility of adjusting the oxygen production rate in VPSA oxygen generators is limited. There is typically a maximum and minimum production rate within the design range. Adjustments beyond this range may affect the normal operation of the equipment or the quality of oxygen produced. Therefore, it is necessary to adjust the oxygen production rate of a VPSA oxygen generator based on actual requirements and the technical specifications of the equipment.

Technical characteristics of pure oxygen outlet:

Production:600 Nm3/h

Purity:90%--93%

Pressure:0.2—0.3Mpa

Atmospheric dew point:-60℃(under normal pressure)

Product Picture: