Cryogenic Middle and Large Air Separation Plant 01
- Post Date: Jan 3,2017
- Expiry Date: Jan 3,2018
- Price Terms:
- Pachaging: standard export wood box or nude
separation plant is by cryogenic process to produce gas/liquid oxygen, nitrogen
and argon. The process firstly remove
the impurities(dust, H2O, CO2, CxHy,etc.) by molecular sieve from the
compressed air. Then it makes air into liquid by extreme low temperature(about
-170~-180 deg C), and then separates air into oxygen, nitrogen, argon by multi
rectifying in the rectification column. The oxygen, nitrogen and argon have
different boiling temperature and different vaporization rate at specific temperature.
The cryogenic liquid air or nitrogen is sprayed from top of column, and
pressurized air or oxygen is vaporized upward. So finally, pure nitrogen is
achieved at top of column and pure oxygen is achieved at bottom of column.
Since oxygen and argon has very close boiling point, so the pure argon is
achieved from the fraction in a separate argon rectification column.
It uses turbine
expander to produce the major coldness for the air liquefying and system
process. Through different process organization,
the cryogenic air separation plant can produce gas/liquid oxygen at purity
99.6%, gas/liquid nitrogen at 1ppm O2, and liquid argon at 10ppm(O2+N2)
according to customers requirements.
cryogenic air separation plant consists of air filter, main air compressor,
booster compressor(depending on process), air pre-cooler, air
purifier(molecular sieve), cold box(rectification column, BAHX brazed aluminum
plate fin heat exchanger,etc.), turbine expander, cryogenic liquid pump,
valves, instruments, instrumental and
electrical control system.
liquid air separation plant models are as below. It can be designed as per