Universal Industrial Plants
Pure Nitrogen Plant-Low Pressure

Universal in Collaboration with ING.L.A. BOSCHI Italy SINCE 1930 manufactures & suppliers Premium Quality low pressure Air separation plants of all sizes ranging from 50m3/hour to 50,000m3/hour including Cryogenic Tonnage gas plants and liquid plants.

With state of the art designs and technology from Europe, established manufacturing facilities spread out in various locations all over India & Asia and sales located in New Corporate Region (NCR) of Delhi, the Italy based company is dedicated to supplying the latest in Cryogenic Technology constantly striving to improve its products through continuous research and development.

Universal is a certified ISO 9001:2000 organization and the latest achievement includes the successful approval for CE Certification which makes our company the first in Asia to certified for Cryogenic Pressure vessel ,Plant machinery exports to Europe and USA. We have success in the low Pressure plants as it is the technology of today and the future. We have manufactured over 300plants since last 23 years since 1985 at New Delhi and supplied to over 40 countries world wide.

l. Air Compressor:

Rotary air compressor screw type can be used for smaller size plants upto 500m3/hr & 1000m3/hr.
Upto 40000m3/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 ,
i t remove the Co2 & moisture for the process air at low- Pressure.

4. Rectification column:

The unit in cold \)ox are all low pressure technology. This unit employs the latest state of the art plate & fin exchanger, cond -ensor and sub- coolers.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 liqefication process and braked by booster, so as to reduce the expanded air volume,stablize 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.

Medium Capacity Pure Nitrogen Plant (32 TPD TO 320 TPD)

Range 1,000 TO 15,000m3/hr
Purity oxygen -99.6% .Nitrogen -99.99% or 3PPM
Operating Air Pressure- 0.6 TO 0.7Mpa


Click Here For Technical Specification
Small Capacity Pure Nitrogen Plants
Range 1,000 TO 15,000m3/hr
Purity oxygen -99.6% .Nitrogen -99.99% or 3PPM
Operating Air Pressure- 0.6 TO 0.7Mpa

Click here for technical specification
Power Consumption : Air Compressor Power + Pre-Cooling + Electro-Heater of Molecular Sieve.

Green-Item is Molecular Sieve Absorber Waste Gas Expansion.
Blue-Item is Molecular Sieve Absorber Air Expansion


Al
AC
PC
PU
P1/2
H

Air Filter
Air Compressor
Pre-Cooling Unit
Purification Unit
MTower1/Tower2
Heater

EX
TE1/2
E2
C1
CR
C2

Main Heat Exchanger
Turbo Expander
Sub Cooler
Column
Condensor Reboiler
Low Pressure Column

Technical Data

Production Oxygen Nitrogen Argon
Purity 99.6% 99.9%-99.99% or 3ppm 99.5% or5ppm
Air Pressure 0.7Mpa/7Bar    
Normal operating pressure of plant 0.6 To 0.7Mpa 0.6 To 0.7Mpa 0.6 To 0.7Mpa
Power Consumption for oxygen 0.5 To 0.8 KWh/m Nil Negligible

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.

Al
AC
PC
PU
P1/2
H

Air Filter
Air Compressor
Pre-Cooling Unit
Refrigerating Unit
Tower1/Tower2
Heater

TE1/2
EX1
EX2
C1
CR


Turbo Expander
Main Heat Exchanger
Sub Cooler
Column
Condensor Reboiler

Process Description

1. Air Compressor-Low Pressure

Air is compressed at a very pressure of 5-7 bar (kg/cm2). 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-cooling the 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 processed 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 deg C


5. Separation If Liquid Air Into Oxygen and Nitrogen by Air Separation Column

Oil free, moisture free and Carbon Dioxide free air enters into low pressure fin type HEAT EXCHANGER where the air is cooled below sub zero temperatures 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.

Nitrogen gas is available at the outlet at purity of 99.99% upto 3ppm (lppm in some models)

Liquid nitrogen is also available alongwith the pure nitrogen gas products.