Active Member
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[China]
Address: No.592 Zhongshan North Road, Hangzhou, China
Contact name:Lou Yizhen
Hangzhou Hangyang Cryogenic Liquefaction Equipment Co., Ltd |
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Cryogenic Air Separation Plant Nm3/h KDON-350/900 Process Gas Liquid Nitrogen Oxygen Gas
Specifications:
The standard products for the Cryogenic Air Separation Plant KDON – 50~500 series
MODEL CONTENTS | KDON-280/600 | KDON-300/3000 | KDON-300/5000 | KDON-200/500 | KDON-350/900 | |
GAN/LIN flow | Nm3/h | 600 | 3000/300L/h | 5000/240 | 500 | 900 |
GAN/LIN purity | ppm | ≤100ppmO2 | ≤3ppmO2 | ≤10ppmO2 | ≤100ppmO2 | ≤100ppmO2 |
GOX/LOX flow | Nm3/h | 280 | 300 | 300 | 200 | 350/30L/h |
GOX/LOX purity | ppm | 99.6% O2 | 99.6% O2 | 99.6% O2 | 99.6% | 99.6% |
GAN/LIN pressure | MPa(G) | 0.015 | 0.7 | 0.6 | 0.01 | 0.016 |
GOX/LOX pressure | MPa(G) | 0.03 | 0.025 | 0.6 | 0.034/0.015 | 0.024/0.08 |
Typical Product: KDON-350/900 Cryogenic Air Separation Plant
Output, purity and pressure
| Flow (Nm3/h) | Purity | Pressure MPa(G) |
GAN/LIN | 900 | ≤100ppm(O2) | 0.01(A) |
GOX/LOX | 350/12.5L/h | ≥99.6%O2 | 0.03/0.16(A) |
Description:
What is air and what is air separation?
Air is a mixture of gases,
consisting primarily of nitrogen (78 %), oxygen (21 %) and the
inert gas argon (0.9 %). The remaining 0.1 % is made up mostly of
carbon dioxide and the inert gases neon, helium, krypton and xenon.
Air can be separated into its components by means of distillation
in special units. So-called air fractionating plants employ a
thermal process known as cryogenic rectification to separate the
individual components from one another in order to produce
high-purity nitrogen, oxygen and argon in liquid and gaseous form.
Compression of air
Ambient air is drawn in, filtered and compressed to approx. 6 bar
by a compressor.
Precooling of air
To separate air into its components, it must first be liquefied at
an extremely low temperature. As a first step, the compressed air
is precooled with chilled water.
Purification of air
Impurities such as water vapour and carbon dioxide are then removed
from the air in a so-called molecular sieve.
Cooling of air
Because the gases which make up air only liquefy at very low
temperatures, the purified air in the main heat exchanger is cooled
to approx. -175°C. The cooling is achieved by means of internal
heat exchange, in which the flows of cold gas generated during the
process cool the compressed air. Rapid reduction of the pressure
then causes the compressed air to cool further, whereby it
undergoes partial liquefaction. Now the air is ready for the
separating column, where the actual separation takes place.
Separation of air
Separation of air into pure oxygen and pure nitrogen is performed
in two columns, the medium-pressure and the low-pressure columns.
The difference in boiling point of the constituents is exploited
for the separation process. Oxygen becomes a liquid at -183°C and
nitrogen at -196°C. The continuous evaporation and condensation
brought about by the intense exchange of matter and heat between
the rising steam and the descending liquid produces pure nitrogen
at the top of the low-pressure column and pure oxygen at the
bottom. Argon is separated in additional columns and involves some
extra steps in the process.
Withdrawal and storage
Gaseous oxygen and nitrogen are fed into pipelines for transport to
users, e.g. steelworks. In liquid form, oxygen, nitrogen and argon
are stored in tanks and transported to customers by road tankers.
Applications:
Competitive Advantage:
