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Low Pressure Oxygen Plant

During the last one decade, Bhartiya Cryogas has supplied and successfully commissioned over 30 plants across the globe.

In the process, Bhartiya Cryogas as earned high reputation for their quality products followed by excellent aftersales product support.

Further, Bhartiya Cryogas is the only source from where a customer gets a complete package of not only buying a quality product, but we also undertake full responsibility and guide the important clients right from the plant layout, foundation, erection and commissioning followed by adequate training during commissioning of the plant to the Operators and Engineers of the client.

As a result of our consistent efforts and feedback received from valuable customers, we have added special features of our plants to render the same compact, heat and tidy, skid mounted and adequately equipped to operate at optimum efficiency under variant ambient conditions to produce 100% plant capacity by adhering to stringent quality, purity etc.

SALIENT FEATURES: Low Pressure Liquid Oxygen Plants & Low Pressure Liquid Nitrogen Plants



We have made tremendous progress in the field of manufacturing highest quality Cryogenic Oxygen Plants, Nitrogen Plants 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 manufacturer of Low Pressure Liquid Oxygen Plants and Low Pressure Liquid Nitrogen plant 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 plants & Nitrogen plants comes at a very competitive and affordable price.

  • Rapid on-site installation and commissioning.
  • Very Low power consumption due to Low pressure (5 to 7 Bar) process.
  • Very low maintenance due to NO RECIPROCATING PARTS.
  • High degree of Instrumentation with ergonomic design.
  • Low specific power consumption due to Low pressure (10 Bar) process.
  • Expansion Turbines used for super cooling of air via Cryogenic expansion.
  • Fully Automatic operation via DCS system available.
  • Fully Containerized model available.
Low Pressure Oxygen Plant  Low Pressure Liquid Oxygen Plant


Low Pressure Nitrogen Plant  Low Pressure Liquid Nitrogen Plant

Low Pressure Oxygen Plant Manufacturing Process

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 expander. 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 And Filling Of Oxygen In Cylinders :
    The final product in the form compressed oxygen / nitrogen goes to the high pressure oxygen cylinders at 150 bar or upto higher as required.

Main components of the plant :
1. Air Compressor :
    “Oil Free” Rotary Screw Compressor with operating Pressure of 6 BAR to 10 BAR

2. 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. 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.

5. 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.

Low Pressure Nitrogen Plant Technical Specifications

Oxygen Purity: 99.6%
Nitrogen Purity: 99.9%-99.99%
Operating Air Pressure- 0.6 TO 0.7Mpa
TECHNICAL SPECIFICATION

Model

Oxygen Capacity

No. of O2 Cylinders per day*

Nitrogen Capacity

No. of N2 Cylinders per day*

BOT-50

50 Nm3/hr

160

60Nm3/hr

320

BOT-80

80 Nm3/hr

320

100 Nm3/hr

400

BOT-100

100 Nm3/hr

400

150 Nm3/hr

600

BOT-130

130 Nm3/hr

500

160 Nm3/hr

640

BOT-150

150 Nm3/hr

600

200 Nm3/hr

800

BOT-170

170 Nm3/hr

680

200 Nm3/hr

800

BOT-200

200 Nm3/hr

800

220 Nm3/hr

880

BOT-250

250 Nm3/hr

900

280 Nm3/hr

900

BOT-300

300 Nm3/hr

1200

300 Nm3/hr

1200

BOT-350

350 Nm3/hr

1400

350 Nm3/hr

1400

BOT-400

400 Nm3/hr

1600

400 Nm3/hr

1600

BOT-500

500 Nm3/hr

2000

500 Nm3/hr

2000

BOT-600

600 Nm3/hr

2400

600 Nm3/hr

2400

BOT-800

800 Nm3/hr

3200

800 Nm3/hr

3200

BOT-1000

1000 Nm3/hr

4800

1000 Nm3/hr

4800


Cylinder is 6-7Cum or 40-47Litres capacity
Nitrogen is available as second product