Low Pressure Turbine Operated Liquid Oxygen/Nitrogen Plant

LOW PRESSURE COLD BOX
PURIFICATION UNIT
PURIFICATION UNIT
MOBILE TRUCK FILLING LIQUID OXYGEN NITROGEN PUMP
TURBINE EXPANDER
RECIPROCATING COMPRESSOR
AIR PURIFICATION UNIT
TURBINE EXPANDER

Products description: 

Cryogenic ( Turbine Expander operated  oxygen/Nitrogen Gas/liquid Small Air Separation Plant

Cryogenic air 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. Mainly the 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.), turbine expander, cryogenic liquid pump, valves,  instruments, instrumental and electrical control system. The normal liquid air separation plant models are as below. It can be designed as per customers’ requirements.  

        External Compression Process by Oxygen Compressor

SN
Model
Gas Oxygen
Gas Nitrogen
Compressors Power
KW
Output
Nm3/hr
Purity
Pressure
 MPa.G
Output
 Nm3/hr
Purity
Pressure
 MPaG
1
ONL-80/40
80
99.6%
16.5
40
99.9%
0.4
65
2
ONL-170/100
170
99.6%
16.5
100
99.99%
0.01
132
3
ONL-350/700
350
99.6%
16.5
700
99.999%
0.01
132*2
4
ONL-550/1000
550
99.6%
16.5
1000
99.999%
0.01
132*3
5
ONL-750/1500
750
99.6%
16.5
1500
99.999%
0.01
132*4
                                     Internal Compression Process by cryogenic liquid pump
1
ONLZO-40
40
99.6%
16.5
40
99.9%
16.5
 60
2
ONLZO-50
50
99.6%
16.5
50
99.9%
16.5
75
3
ONLZO-60
60
99.6%
16.5
60
99.9%
16.5
90
4
ONLZON-80
80
99.6%
16.5
80
99.9%
16.5
110
5
ONLZON-100/100
100
99.6%
16.5
100
99.9%
16.5
90+15
6
ONLZON-150/20
150
99.6%
16.5
150
99.9%
16.5
132+22
7
ONLZON-170/20
170
99.6%
16.5
170
99.9%
16.5
160+30
8
ONLZON-180
180
99.6%
16.5
180
99.99%
16.5
160+30
9
ONLZON-250/20
250
99.6%
16.5
250
99.99%
16.5
220+37
10
ONLZON-300/30
300
99.6%
16.5
300
99.99%
16.5
132*2+45
11
ONLDON-350/30
350
99.6%
16.5
350
99.99%
16.5
160*2+55
12
ONLDON-450/40
450
99.6%
16.5
450
99.99%
16.5
200*2+65
13
ONLDON-600/60
600
99.6%
16.5
600
99.99%
16.5
160*3+75