99.6% Air Separation Plant FON 4500/9000 Industrial Oxygen Plant
With Low Energy Consumption
Pressure out of column
1.1.2. Technical parameters
1.1.2. 1 Raw material air
Process air: 25000m3/h (dry)
Air pressure: ～0.65MPa(A)
Process air : 25000m3/h (dry)
Air pressure: ～0.65MPa(A)
1.2.2. Continuous operation(Between two defrosting times):≥ 2year
2.2.3 Starting time(From start of expander to production of O2 with
2.2.4Defrosting time: ～36Hs
2.2.5 Product control flexibility:
2.3 Power consumption:
Equipment Power(KW) Water consumption(m3/h)
Air compressor 2300(Shaft power) 400
Cooling power pump 13(shaft power) 50
Chiller pump 15.4(shaft power) 15
Chiller unit 45(average) 80
Expander 1.1(shaft power) 5
Total power 2503.5 550
MS absorbing purifier system is adopted and turbine expander with
booster for cold production. The plant is of low pressure process.
The whole process includes: Raw air filter and compression system,
air precooling system, MS purification system, rectification
system, instrument control system, electric control system, O2
compression system, N2 compression system.
The features as:
a. The whole design uses present advanced software “ ASPEN design
software” so as to keep the advance level when the software is
promoting with the air separation plant level to the world advance
ｂ.Precooling system uses packing stuff tower so that mass
transfer, heat exchange efficient is very high.Resisstance is
small, reliability is good. Operation period is long
ｃ. MS absorbing purification technology is used so that switch
over is auto-operated with simple process, easy operation , less
loss of switch over , stable operation condition and safe and
3.1 Air compressor:
Before air goes to air compressor, it goes through air filter for
removal of dust and particles. It is cooled down by intermedium
cooler before it enters the air cooling tower AC.
3.2Air purification and cooling:
Air is cooled in air cooling tower by ambient tempt. water and
refrigerated water(in two stages) to 8～10℃,cooling water for air
cooling tower is water cooling tower and Freon chiller unit and
recycling used. Air out of air cooling tower enters MS absorbers
which ar of vertical bed for removal of moisture, CO2 and CnHm so
as to obtain clean and dried air. Two absorbers are in turn to
absorb. One is absorbing the impurity while the other is under
regeneration by high tempt. waste nitrogen.
The air after absorber is filtered from MS particles and is
divided into two branches: One goes through main heat exchanger to
be cooled to near dew point tempt. to the lower column；Another
branch goes to expansion turbine. Expanded air before going to the
upper column it is heat-siphoned to reduce the overheat degree and
enters the upper column for rectification.
3.3 Lower column:
Cooled air enters lower column for preliminary separation. Air
entering the lower column goes through plates to make the liquid on
the plates evaporating. The purpose is to evaporate more liquid
nitrogen to exchange heat with air and mass exchange to make the O2
to be condensed. In result, O2 content in liquid at the bottom of
the lower column is increased. Nitrogen content in steam is
increased through subcooler at the top. Nitrogen at the top of the
upper column goes through condenser-evaporator to have heat
exchange with liquid O2 and liquid oxygen is evaporated and the
nitrogen is condensed. Part of the condensed nitrogen goes back to
lower column as reflux for lower column.
Another part of liquid nitrogen is subcooled in subcooler and is
delivered to upper column as reflux for upper column. Liquid air is
obtained at the bottom of lower column and goes through subcooler
and after throttled, it enters upper column to take part in
rectification in upper column.
3.4 Upper column
Oxygen is abstracted from the bottom of upper column. Via main
heat exchanger, it is reheated and delivered to be as product
Liquid oxygen is abstracted from the bottom of upper column and
heat-siphoned with expander air to control the carbon hydrogen
concentration. Before waste nitrogen enters main heat exchanger, it
has heat exchange with oxygen enriched and liquid air in subcooler.
After reheated in main heat exchanger, part of waste nitrogen goes
to MS absorber as regeneration gas while the other part is
delivered to water cooling tower recover cold.
Pure nitrogen abstracted from the upper column is having heat
exchange with liquid nitrogen and liquid air in subcooler. After
reheated in main heat exchanger, pure nitrogen is obtained as low
pressure nitrogen product to be delivered out.
4.0Control system: DCS system is used.
The above is brief introduction of the plant which can produce
5000M3/h O2 if the operator has skilful operation experience.
We Hang Zhou tai lian Co., Ltd. is a gas plant and machinery
supplier which is special faced to Bangladesh market.
Our supply scope has: air separation plant (gas oxygen plant,
liquid oxygen plant, nitrogen plant), acetylene plant, hydrogen
plant, CNG station plant, etc.
Also we are exporting gas plant related items: air compressor,
oxygen compressor, liquid oxygen pump, oxygen/nirtogen/argon
cylinders, cylinder valves, regulators, cylinder testing machines.
We have more than 10 companies corporated in Bangladesh.
We have the Ce certificate
We persists in the principle of process lays the
foundation,standard strengthens the quality,Implement decides the
success,Innovation changes the future. According to the
requirements of ISO9001 quality system standard, we have
established effective quality system and feasible quality manual,
which are firmly implemented. Over the past ten years, we have
installed more than 300 air separation plants all over the world
and have obtained the recognition of users. Our products are widely
marketed throughout more than 30 provinces and autonomous regions,
and also exported to dozens of countries including Vietnam,
Kazakhstan, Bangladesh, Iraq, Egypt, Cambodia, Angola, Philippines,
Pakistan, Venezuela, North Korea, Indian, Nigeria,etc.
KDON - 180/350 oxygen plant