Low Pressure Gas Pipeline Oxygen Nitrogen Plants

1. Compression Of Atmospheric Air 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/Oil free piston compressor of advanced technology are employed). 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. 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 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. 6. 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. This can be done by liquid oxygen pump is same models. We can use oil & water free compressor. Salient Features:

• A few of the latest technological features incorporated into the Oxygen & Nitrogen plants are listed below.
• Purity of Oxygen produced from all plants is minimum 99.6% and Nitrogen Purity CAN BE available up to 1-3 PPM (Depending upon requirement of the customer).
• All plants use “Oil free” rotary screw /centrifugal oil compressor working between 5-7 BAR.
• All plants incorporate Aluminum Brazed exchangers and packed columns for high efficiency.
• Turbo expanders (GAS Bearing) for trouble free operation.
• All plants above “500M3/hour” Can supplied with automatic PLC control.
• Engineering support along with complete quality control is provided by our company.
• We provide qualified engineers for Supervision, Installation and start up of all our plants as well as training of manpower at customers’ site.
• Very low power consumption with proven performance and virtually Zero maintenance required for the machines.
• 100% reliability for oxygen gas quality for industrial & hospital use.