Liquid Air generation system,
Air Generation Plant for Liquid CO2
Conditions
1.1 Design points of atmospheric conditions
Atmospheric pressure 100kPa (A)
Ambient temperature 32ºC
Relative humidity 80 %
Altitude 100m
Atmospheric oxygen content 20.95% O2
1.2 Atmospheric temperature
The annual average temperature 19.3ºC
Extreme maximum temperature 43ºC
Extreme minimum temperature -5ºC
1.3 Earthquake intensity
1.4 Impurity conditions of raw material air
CO2 ≤400 ppm
CH4 ≤5 ppm
C2H2 ≤0.5 ppm
CnHm £8 ppm
Mechanical impurities £30 mg/m3
1.5 Utility conditions
1.5.1 circulating water
The inlet temperature 32 ºC
The return water temperature
Inlet pressure 0.4MPa (G)
Outlet pressure 0.25MPa (G)
PH (pH) 7~8
Suspended matter content ≤20mg/L
Total hardness tendency 3.2 L
The fouling coefficient 1.72~3.44×10-4 m2.K /W
Cl ≤300 mg/L
Ca+ 30~200 mg/L
Petroleum ≤5 mg/L
1.5.2 Power supply conditions
High-voltage power 10KV±5%, AC three-phase
Low voltage power 380V/220V, AC three-phase four-wire system,the center point is directly grounded,frequency 60±0.5 Hz.
1.5.3 User's backup instrument air (for startup)
Pressure 0.5 Mpa (G)
Temperature £30 ºC
Dew point <35 ºC
Flow 300 m3 / h
Requirements without oil.
Annex II. Main Technical Performance of Air Separation Device
- Yield and purity (out of bounds)
Product Name | Output Nm/h | Purity (V/V) | Outlet pressure MPa(G) | Remarks |
Liquid oxygen | 1500 | ≥99.6% O2 | Intake tank | continuation |
Liquid nitrogen | 300 | ≤3ppm O2 | Intake tank | continuation |
Liquid argon | 40 | ≤1.5ppm O2,≤4ppm N2 | Intake tank | continuation |
Operation cycle (two large heating interval) ≥2 years
The heating thawing time of the device ~ 36 hours
The start-up time of the device (from the start of the expander until the oxygen product reaches the purity index) ~ 36 hours
2. The power consumption of the above products is as follows :(for reference, the order data shall prevail)
Serial NO. | Equipment | Motor power (rated power) | Shaft power under normal working conditions kW | Voltage grade | Remarks |
Raw material air compressor | 850 | 784 | 10kV | ||
Circulating air compressor | 1470 | 1330 | 10kV | ||
Pre-cooling group | 55 | 41.9 | 380V | ||
Low temperature Pre-cooling group | 75.4 | 75.4 | 380V | ||
Molecular sieve purification system | |||||
Electric heater | 126 | :45 | 380V | One use and one standby, discontinuous operation | |
Expansion group | |||||
Electric heater | 3 | 220V | discontinuous operation | ||
oil pump | 2.2×2 | 1 | 380V | One use and one standby | |
Average power consumption of air separation system (in axis power):2277.3 kW |






