Psa System Hydrogen Separation Process

PSA Nitrogen Generator

Description

The PSA (Pressure Swing Adsorption) Nitrogen Generator operates based on the principle of selective adsorption. It utilizes a bed of specialized adsorbent material, typically a carbon molecular sieve (CMS), which has a higher affinity for oxygen molecules than nitrogen molecules.

The process begins by directing compressed air into the PSA Nitrogen Generator. The air passes through a series of filters to remove impurities and contaminants. The filtered air then enters a vessel containing the adsorbent material.

Under pressure, the adsorbent material selectively adsorbs oxygen molecules, allowing nitrogen molecules to pass through relatively unaffected. This separation is achieved by exploiting the different adsorption characteristics of oxygen and nitrogen on the adsorbent material. As a result, a stream of nitrogen gas with a significantly higher purity is produced.

The adsorption process continues until the adsorbent material becomes saturated with oxygen. At this point, the vessel is depressurized, and the pressure swing occurs. By reducing the pressure, the adsorbed oxygen molecules are released from the adsorbent material, allowing it to regenerate and prepare for the next cycle.

To ensure a continuous supply of nitrogen gas, PSA Nitrogen Generators typically operate with multiple vessels or adsorption beds. While one bed is in the adsorption phase, providing nitrogen gas, the other bed goes through regeneration. This cycling process ensures a constant and uninterrupted flow of high-purity nitrogen gas.

Overall, the principle behind the PSA Nitrogen Generator is based on the differential adsorption of oxygen and nitrogen on the specialized adsorbent material. By manipulating the pressure, the system achieves the selective adsorption and desorption of oxygen, resulting in the production of high-purity nitrogen gas.

 Technical Features
1). Full Automation
All systems are designed for un-attended operation and automatic Nitrogen demand adjustment.
2). Lower Space Requirement
The design and Instrument makes the plant size very compact,assembly on skids,prefabricated from factory.
3). Fast Start-up
Start-up time is only 5 minutes to get desired Nitrogen purity.So these units can be switched ON&OFF as per Nitrogen demand
changes.
4). High Reliabiity
Very reliable for continuous and steady operation with constant Nitrogen purity.Plant availability time is better than 99% always.
5). Molecular Sieves life
Expected Molecular sieves life is around 15-years i.e. whole life time of nitrogen plant.So no replacement costs.
6). Adjustable
By altering flow,you can deliver nitrogen with precisely the right purity.

Specification

Box PSA Nitrogen Generator

Nitrogen capacity : 1 ~100Nm3/h
Nitrogen purity : 95%-99.999%
Nitrogen pressure : 0.5-0.8Mpa(boost for high pressure) Nitrogen dew point : ≤-40℃(Atmosphere pressure)
Control power supply : 0.2kw 220v 50Hz