Liquid nitrogen generator 1100 Nm3/h KDN - 1100 Nitrogen generation
plant Inert Gas LIN GAN Glass Making
The followings are the standard products for the Liquefcation Air
Equipment KDN series which are manufactured by our company.
Regarding other particular product can be calculated and designed
according to the actual requirements.
Typical Product:KDN 1100/165Y 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 on data of gas, and the pressure
is calculated with 0 meter high at outlet of cold box.
3. All pressures which are not specially defined below are the
The proposed plant employs a process in which air is purified by
molecular sieve and waste nitrogen is refluxed and expanded.
Following the elimination of dust and other mechanical impurities
from process air in an air filter, the process air enters air
compressor to be compressed, and then enters precooling system to
be cooled to approx 5~8℃ and to be reached saturated condition.
The compressed air enters one of molecular sieve adsorbers (such as
MS1) where such impurities contained in air as moisture, CO2, C2H2
and hydrocarbon are adsorbed by molecular sieve.
The purified air out of adsorber enters main heat exchanger E1 in
which the temperature reduced gradually; out of E1, the cooled air
reaches the saturated temperature and enters the bottom of nitrogen
column C1 to take part in rectification.
Air rises in nitrogen column C1 to be condensed continually, of
which the nitrogen content increased, and the product nitrogen gas
is obtained at the top.
Nitrogen gas drawn out of the top of column enters main heat
exchanger E1, and after air fed out of cold box is supplied to
The rest of nitrogen gas at the top of column enters condenser
evaporator K1 to be condensed as liquid nitrogen.
Liquid nitrogen is fed into liquid nitrogen storage tank SV1 to be
supplied to client as the product liquid nitrogen.
The rest of liquid nitrogen fed back to nitrogen column C1 as the
reflux liquid to take part in rectification and to be vaporized
gradually such that the oxygen content increases; then the
oxygen-enriched liquid air is obtained at the bottom of column.
Oxygen-enriched liquid air enters liquid air subcooler E2 to be
subcooled and throttled to be fed into condenser evaporator K1.
Oxygen-enriched liquid air is vaporized to be oxygen-enriched air
in condenser evaporator K1 and then the oxygen-enriched air to be
fed out of the top of column and into main heat exchanger E1 to be
warmed. The warmed air is fed out of the middle portion of main
heat exchanger E1 and into turbo-expander ET1 to be expanded and
Expanded oxygen-enriched air enters main heat exchanger E1 to be
fed out of cold box after to be rewarmed.
Part of oxygen-enriched air fed out of cold box enters electric
heater EH to be warmed, and then enters another molecular sieve
adsorber (such as MS2) as the regenerated gas for molecular sieve
adsorber, and the rest is discharged.
Product liquid nitrogen enters cryogenic liquid storage tank to be
standby gas at abnormal situation. After the cryogenic liquid
nitrogen is vaporized in vaporizer, it will be supplied to pipe
1. Ripening Gases for Fruits
2. Generate Vegetable Maturity Gas
3. Hydrogenation in Oleo chemical
4. Blanketing gas in Oleo chemical
5. Modified Atmosphere Gas
6. Chilling and Cooling
1. Our company is one of the state 21 great equipment domestication
2. High quality and steady after-sale service
3. Mature project supervision
4. Good quality materials
5. Widely sales around the world
6. All pressure vessel of this nitrogen plant is designed and
manufactured in accordance with ASME specifications for long,
stable and reliable running, economization of energy, convenient
operation and maintenance.