Gas Nitrogen Plants

STAGE 1 – Compression of Air

The free saturated air is drawn from atmosphere through a highly efficient dry-type Suction Filter into the first stage of the horizontally balanced opposed, lubricated reciprocating air compressor. The air is compressed over a multistage process to the desired air pressure (30-40 bar) and is then sent to the process skid for further use.

STAGE 2- Purification of Air

The compressed air is passed into an after cooler where the temperature is reduced to around 35 degree centigrade after which it is chilled in a Chilling Unit to a temperature of 12 degree centigrade and then passed through a Moisture Separator where the condensed moisture gets removed before entering into Molecular Sieve Battery.

Before sending the air to the Molecular Sieve Battery, air is passed through an Oil Absorber where air becomes oil free. Chilled air passes through the

Molecular Sieve Battery consisting of Twin Towers packed with Molecular Sieves to remove moisture and Carbon dioxide present in the air.

Molecular Sieve Battery operates on Twin Tower System. When one tower is under production the, other tower is regenerated by passing waste Nitrogen gas at 200 degree Centigrade through a Reactivation Heater.

After interval of 8 to 10 hours, the tower under production gets exhausted and is regenerated by similar process before use and thus the cycle continues. Any dust particles gets filtered in the Dust Filter before air enters the Air Separation Column.

STAGE 3- Air Separation

Chilled, Oil-free and moisture free air enters into multi-pass Heat Exchanger No. I where it gets cooled to (-80) Degree Centigrade by cold gained from outgoing waste Nitrogen and Oxygen.

A part of this air enters a multi-pass Heat Exchanger No. II or Liquefied made of special Alloy tubes. This air cools to (-170) Degree Centigrade before passing through an Expansion Valve. Due to Joule Thompson Effect, after the expansion valve, air gets further cooled down and gets liquefied before entering into Bottom Column after which it comes to be known as Rich Liquid.

The Rich Liquid in the Bottom Column enters into the feed tray of the top column. Similarly the liquid nitrogen called Poor Liquid enters into Top

Column as a reflux & it takes away the heat of condensing Oxygen and gets vaporized whereas the liquid Oxygen flows down the trays of the Top Column into the Condenser and then passes through a Sub-Cooler to a Liquid Oxygen Pump.

STAGE 4- Gasified Oxygen

In Gas Plants, the L.O pump pumps liquid oxygen through heat exchanger no. I & II, where liquid oxygen gets gasified before filling in cylinders in the Filling Manifold.

The pure bone dry oxygen gas at ambient temperature and high pressure is filled into Oxygen Cylinders through manifold valves by means of the highly efficient reciprocating Liquid Oxygen Pump.

In Liquid Plants, the liquid oxygen or nitrogen is filled directly into a Cryogenic Liquid Tank (capacity of 200 liters to 50,000 liters) where it is stored and used according to requirement.

STAGE 5- Nitrogen Production

Nitrogen can be produced both in gaseous as well as liquid form simultaneously without additional cost. Both commercial as well as technical grade can be produced.

Air Compressor

This is a multi stage, heavy duty water-cooled air compressor for 24 hours operation, horizontal type complete with fly wheel inter cooler, foundation bolts, motor pulley, motor, v belt, guard and slide rails. This is used to compress atmospheric air.

Air Purifier / Process Skid

This consists of the following Parts:

1) After cooler with tank
2) Nitrogen cooler with tank
3) Moisture separators
4) Chilling units with Freon unit
5) Oil absorber filled with alumina
6) Molecular sieve batteries on skid
7) Defrost heaters
8) Gas/Air/water line as per standard layout on skid /platform prefabricated and ready for installation
9) Water pump
10) Inlet & outlet water lines
11) Drain manifold complete with ball valves for draining moisture. All the above equipments are properly mounted on skid /platform complete with interconnecting piping and ready for installation.

Expansion Engine

Complete with branded motor/starter of Siemens / ABB world class quality. Expansion Engine is complete with hydraulic valve control, bursting disc for safety, complete with fly wheel pressure gauge, motor pulley V belt, Belt guard, slide rails inter connected pipes (inlet and outlet)

Air Separation Column - Cold Box

This consist of the complete cold box (outer steel casing) complete with top column, bottom column, condenser, sub-cooler, re-boiler, exchanger 1, exchanger 2, control panel, instruments, pressure gauges, digital automatic temperature scanner withpt-100 sensors, expansion valves, analysis valves, inlet & outlet, air oxygen and nitrogen, gas lines with control valves neatly mounted and firmly fixed on the cold box.

STAINLESS STEEL IS REQUIRED FOR HOSPITAL OXYGEN, FOOD GRADE QUALITY AND ALSO TO MAKE EXPLOSION PROOF.

NOTE: OLD TYPE OF COPPER VESSELS/COLUMNS/TRAYS LIKE CHINESE AND LOCAL TYPE DISCONTINUED 10 YEARS BACK.

Liquid Oxygen Pump

Horizontal single acting pump with Piston, Piston Rings - oil free - Teflon with guide ring, Safety Devices, Non-Return Valves, Motor with Pulley, V-Belts, Belt Guard, Inter Connecting Pipes with ducting to cold box suitable for filling Oxygen

High Pressure Filling Manifold

For filling high-pressure Oxygen to Cylinders. It consists of main High Pressure Isolation Valve and Pigtail filling connection with individual regulation Valve with Pressure Gauge and Safety Relief Valve.

We are manufacturers of Latest Low Pressure Air Separation Plants of the Brand Cryofusion and Mandressi Italia and employ the latest Low Pressure Turbo Technology Series Air Separation Plants of Cryofusion and Mandressi operating at a working pressure of 6 to 8 bar.

Our company uses Rotary Screw type Air Compressors of Atlas Copco and a very efficient Air Separation Column (Cold Box) for achieving 99.9% yield to give a waste Nitrogen purity of nitrogen gas at the outlet of the cold box as low as 3 Parts per million.