Low Pressure Liquid Oxygen/Nitrogen Plants
Salient Features
We have made tremendous progress in the field of manufacturing highest quality Cryogenic Oxygen/Nitrogen and Acetylene plants. We are indeed gifted with some of the finest professionals in this field coupled with an excellent infrastructure. We have built up most modern manufacturing facilities blended with sublime technical expertise. By virtue of these multifaceted potentials, we have established ourselves as the lone manufacturer of 100% liquid cryogenic Oxygen/Nitrogen plants in India and have supplied several plants to our important customers in Middle East, Africa, South East Asia and Latin American countries.
We take this opportunity to herald the advent of Low Pressure Liquid Oxygen/Nitrogen plant as yet another feather to the BVEL’s crown of glory. These Bhartiya BOPL models of Low Pressure Liquid Oxygen/Nitrogen is supplied with Rotary Screw Compressors in our Air Separation Plants operating at a working pressure of 6 to 8 bar using Rotary Screw type Air Compressors and very highly efficient Air Separation Column. These Low Pressure Technology Oxygen/Nitrogen plants comes with a very competitive and Affordable prices.
Manufacturing Process
Compression of Atmospheric Air By Air Compressor
Air is compressed at a very pressure of 5-7 bar (kg/cm2 by trouble free rotary compressor (Screw / Centrifugal Type). The Air enters the suction air filter and after being removed of dust and other mechanical contaminants in it, it is compressed to the pressure of 0.8MPa by the Air compressor. Air from the air compressor is cooled to 10oc in the air precooling system and separated condensing water in water separator. After the water being separated its condensed water, taken into the molecular sieve adsorber for removing H2O, C2H2 and CO2.
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.
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.
Cooling of Air By Expander (Turbo)
The air has to be cooled to sub zero temperatures for liquefaction & 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.
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 fin type Heat Exchanger where the air is cooled below sub zero temperatures by air expansion process in the turbo expan der. Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification. Oxygen is available at the outlet of the ASU at a purity of 99.6%. Nitrogen is also available at the outlet as a second product at purity of 99.9% upto 3ppm simultaneously without loss of oxygen product.
Compression of Oxygen
The final product- LOX of 99.6% is drawn from oxygen side of the evaporator to fill in cryogenic liquid tanks.
Main components of the plant
- Air Compressor: “Oil Free" Rotary Screw Compressor with operating Pressure of 6 BAR to 10 BAR
- Pre cooling system: Air separation plants adopts chilling system in all air pre-cooling systems.
- 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.
- Cold Box: The unit is supplied as a packed unit complete with all the control systems including digital flow-meters, temperature, Online Analyzer. This unit comes with plate and fin exchanger, condenser and sub-coolers.
- Turbo-expander: Turbo-expander is used for giving cooling to the air for the liquefaction process and braked by booster, so as to reduce the expanded air column stabilize the upper columns working condition and reduce power consumption. The turbine expander have complete trouble free working and long life and reliability.
Technical Specification
| Model | Liquid Oxygen Capacity |
LOX Purity |
Operating Pressure | Liquid Nitrogen Capacity |
LIN Purity |
| BOTL-50 | 50Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 50Ltrs/Hr | 99.9-99.99% |
| BOTL-80 | 80Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 80Ltrs/Hr | 99.9-99.99% |
| BOTL-100 | 100Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 100Ltrs/Hr | 99.9-99.99% |
| BOTL-150 | 150Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 150Ltrs/Hr | 99.9-99.99% |
| BOTL-170 | 170Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 170Ltrs/Hr | 99.9-99.99% |
| BOTL-200 | 200Ltrs./Hr | 99.6% | 7 bar(kg/cm2) | 200Ltrs./Hr | 99.9-99.99% |
| BOTL-250 | 250Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 250Ltrs/Hr | 99.9-99.99% |
| BOTL-300 | 300Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 300Ltrs/Hr | 99.9-99.99% |
| BOTL-350 | 350Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 350Ltrs/Hr | 99.9-99.99% |
| BOTL-400 | 400Ltrs/Hr | 99.6% | 7 bar(kg/cm2) | 400Ltrs/Hr | 99.9-99.99% |
| BOT-500 | 500 Ltrs/hr | 99.6% | 7 bar(kg/cm2) | 500 Ltrs/hr | 99.9-99.99% |