High purity PSA nitrogen generator for electronics industry
Technical index:
· Flow:100~2000Nm3/h
· Purity: 99.9%-99.9995%
· Dew point:-40ºC
· Output pressure:0.1~0.6Mpa
Operational Principle of PSA Nitrogen Generation:
PSA nitrogen generation adopts carbon molecular sieve as adsorbent
whose capacity of adsorbing oxygen is larger than adsorbing
nitrogen. The two adsorbers (a&b) alternately adsrbing and
regenerating to separate oxygen from nitrogen in air to obtain
purified nitrogen by Auto-operated valves controlled by PLC.
1. Compressed air system
Air compressor supply the raw material air for the nitrogen
generator. The nitrogen making system need high quality,stable
pressure and enough air consumption.Air compressor should use the
reliable, maintenance easily,low noise,screw air compressor.
2. Pressure Swing Adsorption Nitrogen making system
Pressure swing adsorption (PSA) is an advanced gas separate
technique,it is widely used in gas supply field in the world.
2 .1 Adsorbing material
Adsorbing material is the center part of PSA nitrogen
generator,Normally use the the Carbon Molecular Sieve,it can adsorb
the oxygen,CO2,water in the air,but can't adsorb the nitrogen..
2.2 PSA principal
Because O2 and N2 these two gas molecule have diffusion rate
difference on the molecule sieve surface,O2 smaller diameter can
diffuse faster,most of them inlet micropore of CMS,the large
diameter N2 diffuse slowly,less of them can inlet ,use this
adsorption difference come true O2 and N2 separate.
2.3 PSA N2 making processing
(1)Inlet air:The air compressor press the air into transporting
pipe,then use the compressed air clarification system to remove the
water,oil,dust and so on,reach to air buffer tank,then pass through
air buffer tank into two adsorption tower.
(2),Adsorption: When air inlet adsorption tower,during the pressure
function,O2 and CO2 be adsorbed quickly.Formed N2 near the outlet
position.
(3),Air outlet :When the adsorption process working in the best
status(Adsorption N2:O2 is the smallest),open the outlet
valve,transport the N2 into N2 buffer tank.
(4), Average pressure:After finished exhaust,rest some N2 in the
tower,so let it into another tower adsorb again with new air.This
process is finished when the pressure of two tower is the same,so
called average pressure.
(5),Exhaust :After average pressure finished,need to releasing the
air which adsorb by CMS to be ready for next adsorption,the
programme will open the air releasing valve automatically,let the
pressure in the tower back to the original status,meanwhile release
the O2,CO2,so than the CMS can adsorb new air again.
(6), These two tower exchange work can got N2 purity 99.9 %
Please check below chart of CMS adsorb under different pressure of
O2 and N2 :
Specification:
| Item | Technical | Remark |
| N2 flow rate | 150Nm3/h | Standard state |
| N2 purity | ≥95.0% | non-oxygen content |
| N2 outlet pressure | 0.1~0.6Mpa | Gage pressure, adjustable |
| N2 outlet dew point | ≤ 45 °C | Atmospheric dew point
|
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.
Features of Our Products
Full Automation
All systems are designed for unattended operation and automatic
Nitrogen demand adjustment.
Low Electric Energy Consumption
All systems are designed for Energy-Efficient.
Lower Space Requirement and Short installation period
The design and Instrumentation makes the plant size very compact,
assembly on skids, prefabricated and supplied from factory. Tongyue
Machinery has own TRUE brand of gas separation equipments.
Installation is very easy and convenient.
Fast Start-Up
Start-up time is about 30 minutes to get desired Nitrogen purity.
So these units can be switched ON & OFF as per Nitrogen
Demand changes.
High Reliability
Very reliable for continuous and steady operation with constant
Nitrogen purity. Plant availability time is better than 98% always.
Molecular Sieves Life
Expected Molecular sieves life is more than 10-years i. e. Whole
life time of Nitrogen plant. So no replacement costs.
Simple operation and maintenance
All systems are designed by integrated solution for easy-operation
and easy-maintenance.
