Liquid nitrogen generator 2200 KDN-2200 Liquid Nitrogen Low
Pressure Nitrogen Pure Nitrogen
Product List For KDN Series Nitrogen Generator
Typical Product: KDN-2200 Liquid nitrogen generator
Output, purity and pressure
Note: 1. Nm3/h is defined as the volume at 0℃, 101.3kPa(A);
2. The liquid output is calculated from data of gas, and the
pressure is calculated with 0 meter high at outlet of cold box.
The plant employs a expansion turbine process in which the air is
purified by molecular sieve, nitrogen is produced by means of
double columns with expansion achieved through backflow.
After the feed air is cleaned of dust and mechanical impurities
in air filter, it is compressed to 0.95MPa in air compressor.
The compressed air is then fed into air pre-cooling system to be
cooled to 10 ℃, it becomes saturated.
The saturated and compressed air flows into switched molecular
sieve adsorbers where such hydrocarbons as H2O, CO2 and C2H2 are
adsorbed from the air.
A small part of purified process air is drawn out to be used as
instrument air; the remainder is fed into main heat exchanger to be
cooled to saturated state with the refluxed gas. The cooled air is
fed into the bottom of nitrogen column for participation in
rectification. The product medium pressure nitrogen is obtained at
the top of nitrogen column while the saturated and oxygen-rich
liquid air at the bottom of column and the liquid nitrogen at the
top of column are throttled in the liquid air and liquid nitrogen
subcooler and then into the corresponding postion of upper column.
Follow the further rectification in the upper column, the low
pressure nitrogen is obtained at the top, which will be sent to the
user after being rewarmed in the main heat exchanger.
The waste nitrogen which is withdrawn from the upper part of main
heat exchanger goes into the subcooler and main heat exchanger to
be rewarmed to a certain temperature, and then goes into the
expander to be expanded. The expanded gas goes into main heat
exchanger to be rewarmed, and then goes out of cold box, part of
which will be the regeneration gas of molecular sieve, and the rest
will be blow-off.
. In order to prevent hydrocarbon from accumulating in condenser
evaporator, a small stream of liquid drawn from oxygen-rich liquid
air evaporation side is discharged as waste liquid.
1. Mixed Gases for prolonging shelf life of fruit and vegetables
2. Carrier Gas
3. Protective Gas
4. Nitrogen Purging & Pressurize Test
5. Carrier Gas
6. Welding and metal processing
7. Food and beverage
1. Long service life
2. Widely sales around the world
3. No loss, high returns
4. Engineers available to service machinery overseas