Carbon Steel Small Onsite Nitrogen Generator 99%-99.9995% Purity
For Food Industry
I, Nitrogen generator system design
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.
Remark:We suggest air compressor prepare a spare set,to confirm the
2. Compressed air clarification system
Compressed air pass through 9 grade filters,then pass through
cooling type dryer.let the compressed air cooling,let the vapour in
the air condensation into water,along with dust,oil drain out the
machine.It’s better to put the cooling dryer in the compressed
After the cooling dryer is the filters,there are two group
filters,one is 7 grade main pipeline filters,another is 5 grade
high quality oil removing filter.7 grade main pipeline filter
precision is 1um,filter out 1um and larger solid state and liquid
particle,vestigital oil content 1ppm w/w.5 grade high quality oil
removing filter filtrate precision 0.01um,remove 0.01um and larger
solid state and liquid particle, 99.9999+% oil,the rest oil content
0.001 ppm w/w. Compressed air quality can reach 1 class according
to ISO8573.1. Such clean and dry compressed air can inlet active
carbon filter,air buffer tank then inlet nitrogen generator
part,after PSA device make out the nitrogen purity ≥99%.
3. 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.
3 .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..
3.2 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.
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.
Start-up time is about 30 minutes to get desired Nitrogen purity.
So these units can be switched ON & OFF as per Nitrogen
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