Under the balance of adsorption, when any kind of adsorbent adsorbs
the same gas, the higher the gas pressure, the greater the
adsorption capacity is. Otherwise, the lower the pressure, the
smaller the adsorption power is.
As the chart shows, carbon molecular sieve shows difference in
adsorbing oxygen and nitrogen. Carbon molecular sieve is a
substance with a lot of micropores inside. The PSA principal is to
achieve the separation goal of oxygen and nitrogen which based on
the adsorption quantity difference in the carbon molecular sieve
when the pressure is certain.
When the pressure rises, the carbon molecular sieve adsorbs the
oxygen and produces the nitrogen gas. When the pressure decreases,
the carbon molecular sieve starts to desorb the oxygen until the
pressure equals to the ordinary pressure. At that time, the carbon
molecular sieve desorbs the oxygen completely. The PSA nitrogen
generator is usually equipped with adsorption towers. It controls
the pneumatic valve by PLC, thus the two adsorption towers can
produce the nitrogen gas alternatively. One tower adsorbs the
oxygen and produces nitrogen gas, the other desorbs to regeneration
to produces the required nitrogen.
Applications:
1. Metallurgy: For anneal protection, agglomeration protection,
nitrogenizing, furnace washing and blowing ,etc. Used in fields
such as metal heating treatment, powder metallurgy, magnetic
material, copper process, metallic mesh, galvanized wire,
semiconductor, etc.
2. Chemical and new material industries: For chemical material gas,
pipeline blowing, gas replacement, gas protection, product
transport, etc. Used in fields such as chemical ,urethane elastic
fiber, rubber, plastic, tyre, polyurethane, biological technology,
intermediate, etc.
3. Electronic industry: For encapsulation, agglomeration, anneal,
deoxidization, storage of electronic products. Used in fields such
as peak welding, circumfluence welding, crystal, piezoelectricity,
electronic porcelain, electronic copper tape, battery, electronic
alloy material, etc.
