Liquid Nitrogen Plants
Universal Boschi is one of the reputed manufactuer/exporter and supplier of Liquid Nitrogen Plants.
With the help of our skilled research team we have ben able to manufacture and operate these liquid nitrogen plants at low pressures (5-7 bar) thus cutting down the operating and maintenance cost.
Turbo plants due to unique features incorporating low pressure machinery has no capacity limitations or restrictions like Medium & High pressure plants.
Basic Principle :
The air separation plant is a plant recovering oxygen and nitrogen from air simultaneously. It advance low pressure technology process of Boschi Italy using Rotary screw compressor (or low oil free piston compressor)and turbo expanders. The feed air entering the Molecular Sieve purification system employed to remove the moisture and Co2 from the process air. The air is liquefied by cryogenic cooling using latest plate and fin high efficiency heat exchangers and turbo expanders. The liquid air separates into oxygen nitrogen and inert gases in the air separation column.
Main Components :
1. Air Compressor:
Rotary air compressors screw type can be used for smaller size plants upto 500m3/hr & 1000m3/hr. Centrifugal compressor can be used for higher size plants.
2. Air pre-cooling system:
Air separation plants adopts chilling system in all air pre-cooling systems.
3. Air purification system:
This system beds of molecular sieve are used in the air purification system, it remove the Co2 & moisture for the process air at low-pressure
4. Rectification Column:
The unit in cold box are all low pressure technology. This unit employs the latest state of the art plate and fin exchanger, condenser and sub-colers. The column is supplied as a packed unit complete with all the control systems including digital flow-meters, temperature, pressure available with high purity upto 2-3 ppm nitrogen as a second product without loss in oxygen production.
5. Turbo-expander:
Turbo-expander is used for giving cooling to the air for the liquification process and braked by booster, so as to reduce the expanded air colume,stabilize the upper columns working condition and reduce power consumption. The turbine expanders have complete trouble free working and long life and reliability.
6. Computer Control:
All the plants can be configured for automatic operation through a pc this will use a out switching valves of German or Japanese and motorized cryogenic valves on cold box.
Process Description :
1. Air Compressor-Low Pressure
Air is compressed at a low pressure of 5-7 bar (0.5-0.7mpa). Air can be compressed at such low pressure by trouble free rotary compressor (Screw / Centrifugal Type advanced technology is employed in lieu of old bulky piston compressor).
2. Pre Cooling System
The second stage of the process uses a low pressure refrigerant for pre-coolingthe processed air to temperature around 12 deg C before it enters the purifier.
3. Purification of Air by Purifier
The air enters a purifier consisting of twin Molecular Sieve driers, working alternatively. The Molecular Sieves remove the Carbon dioxide & moisture from the process air before the air enters Air Separation Unit.
4. Cryogenic Cooling of Air by Turbo (Expander)
The air has to be cooled to sub zero temperatures for liquification & the cryogenic refrigeration & the cooling is provided by highly efficient turbo expander, which cools the air to temperature almost below -165 to-170 degC.
5. Separation of Liquid Air Into Oxygen and Nitrogen by Air Separation Column
Oil free, moisture free and Carbon Dioxide free air enters into low pressure plate fin type Heat exchanger where the air is cooled below sub zero temp, by air expansion process in the turbo expander.
Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification.
6. Compression of Oxygen and filling it in Cylinders
The final product in the form compressed Oxygen/Nitrogen goes to the high pressure oxygen cylinders at 1 50 bar or upto higher as required.. Or for pipeline supply or captive consumption | Or for liquid plants to fill in cryogenic liquid tanks.
Technical Specifications :
Universal Boschi (Italy) is a reputed manufacturer/exporter and supplier of Liquid Nitrogen Plants(Low Pressure) in the range of 20 cum/hr - 15,000 cum/hr and following are the specifications for the same :
| Model (LIN/N2*Ar) |
LIN Capacity Nm3/h |
LIN Capacity L/Hr |
GN2 Capacity Nm3/h |
N2 Purity % |
| UBTN-20/20 |
20 |
24 |
20 |
99.9%-99.9% 3PPM |
| UBTN-30/30 |
30 |
36 |
30 |
99.9%-99.9% 3PPM |
| UBTN-40/50 |
40 |
48 |
50 |
99.9%-99.9% 3PPM |
| UBTN-60/80 |
60 |
72 |
80 |
99.9%-99.9% 3PPM |
| UBTN-80/100 |
80 |
96 |
100 |
99.9%-99.9% 3PPM |
| UBTN-100/150 |
100 |
120 |
150 |
99.9%-99.9% 3PPM |
| UBTN-120/150 |
120 |
144 |
150 |
99.9%-99.9% 3PPM |
| UBTN-150/150 |
150 |
180 |
200 |
99.9%-99.9% 3PPM |
| UBTN-170/200 |
170 |
204 |
200 |
99.9%-99.9% 3PPM |
| UBTN-200/220 |
200 |
240 |
220 |
99.9%-99.9% 3PPM |
| UBTN-220/20 |
220 |
264 |
220 |
99.9%-99.9% 3PPM |
| UBTN-250/250 |
250 |
300 |
250 |
99.9%-99.9% 3PPM |
| UBTN-300/300 |
300 |
360 |
300 |
99.9%-99.9% 3PPM |
| UBTN-350/350 |
350 |
420 |
350 |
99.9%-99.9% 3PPM |
| UBTN-400/400 |
400 |
480 |
400 |
99.9%-99.9% 3PPM |
| UBTN-500/500 |
500 |
600 |
500 |
99.9%-99.9% 3PPM |
| UBTN-600/600 |
600 |
720 |
600 |
99.9%-99.9% 3PPM |
| UBTN-800/800 |
800 |
960 |
800 |
99.9%-99.9% 3PPM |
| UBTN-1000/800 |
100 |
1200 |
800 |
99.9%-99.9% 3PPM |
| UBTN-1500/1500 |
1500 |
1800 |
1500 |
99.9%-99.9% 3PPM |
| UBTN-2000/2000 |
2000 |
2400 |
2000 |
99.9%-99.9% 3PPM |
| UBTN-1500/1500/45 |
1500 |
1800 |
1500 |
99.9%-99.9% 3PPM |
| UBTN-3600/3600/100 |
3600 |
4320 |
3600 |
99.9%-99.9% 3PPM |
| UBTN-6000/13000/200 |
6000 |
7200 |
13000 |
99.9%-99.9% 3PPM |
| UBTN-10000/18000/380 |
100000 |
12000 |
18000 |
99.9%-99.9% 3PPM |
| UBTN-15000/13000/450 |
15000 |
18000 |
13000 |
99.9%-99.9% 3PPM |
