Cryogenic Air Separation Plant 600/600Nm3/h KDON-600/600 Gas Air Separation Unit Bleaching Gas GOX GAN
Standard Product List for the Cryogenic Air Separation Plant KDON
500~750 Nm3/h (GOX) Series
Typical Product:600/600Nm3/h KDON-600/600 Air Separation Unit
Output, purity and pressure
The proposed plant employs a process in which air is purified by
molecular sieve and refrigerated by boosting turbine expander;
fractionating column is sieve trays column.
The feed air sucked through air intake is cleaned of dust and other
mechanical impurities in air filter AF and compressed to a pressure
by air compressor. The compressed air flows into air precooling
system for temperature to be reduced.
The air comes from the air precooling system flows into switched
molecular sieve adsorber where such impurities as moisture, CO2,
C2H2 and other impurities are adsorbed by molecular sieve.
The purified air is divided into three streams: one stream is fed
out to be instrument air; another stream enters main heat exchanger
(E1) to be cooled to the saturated temperature by reflux gas and
then enters nitrogen column (C1); the air keeps rising in the
nitrogen column and being condensed to increase the nitrogen
content, and the nitrogen will be obtained at the top. Part
nitrogen will be sent to oxygen column to be as completion heat
source of liquid oxygen evaporator. And the rest nitrogen is
withdrawn as product, and then goes out of cold box after being
rewarmed with main heat exchanger, and after being boosted to the
required pressure of user with the boosting end of expander, it is
fed into the nitrogen pipe network.
The oxygen enriched liquid air at the bottom of nitrogen column
goes into the liquid air subcooler to be subcooled, and then part
liquid air to be throttled goes into the nitrogen column
condensation evaporator. And the rest goes into the oxygen column
as reflux liquid.
The oxygen enriched liquid air is evaporated to be oxygen enriched
air which is withdrawn from the top and goes into the main heat
exchanger to be rewarmed, and then it toes into the expander tor
expansion refrigeration after being withdrawn from the middle of
main heat exchanger.
The expanded oxygen enriched air enters main heat exchanger to be
rewarmed, and then goes out of cold box.
Part of the oxygen enriched air which goes out of cold box enters
electric heater, and then goes into another molecular sieve
adsorber as the regeneration gas. The rest will be discharged.
The liquid oxygen will be obtained after the oxygen enriched liquid
air is rectified in oxygen column. The liquid oxygen goes into the
main heat exchanger to be rewarmed after being boosted with liquid
oxygen pump, and then it goes out of cold box as product.
1. Hardening Gas
2. Sterilization Gas
3. Electronic Gas
4. Nitrogen Purging & Pressurize Test
5. Cutting Gas
1. Long service life
2. Low-power high-efficiency
3. Convenient operation and maintenance
4. Low power consumption.