Nitrogen Plant

Nitrogen (N2) constitutes 78.03% of the air. Nitrogen is used in the chemical and petroleum industries for storage tank blanketing and vessel inserting applications. It is also used extensively by the electronics and metals industries. Liquid nitrogen, produced by the cryogenic air separation process, finds wide use as a refrigerant in applications such as cryogenic grinding of plastics and food freezing. We supply variety of nitrogen gas plants, Liquid nitrogen plants.

Nitrogen Plant having the following Machineries and Equipments:	Nitrogen Plant Capacity

1. Air Compressor

The air compressor is supplied 4 stroke type along with suitable motors, electrical starters, motor pulley, belts and inter stage coolers. The air compressed in this compressor to 40 to 55 kgs/cm2 depending the plant condition and requirements. Air compressor should be maintained properly as per manufactures manual to obtain the maximum output and efficiency.

2. Water pump, cooling towers and water softeners

These are supplied as per compressor manufacturers instructions and to be maintained properly to achieve minimum shutdown and trouble - free operation of the compressor

3. After Cooler :

This is cylindrical tank fitted with air coils. The air is cooled after passing from compressor and cooled by circulating water.

4. Cascade Cooler:

This is elliptical tank fitted with air coils. These coils are half submerged in water, dry nitrogen bubbled through this water to become wet gas. As water vaporizes water gets cooled. The air inside the pipe will get cooled.

5. Moisture Separators:

Two numbers of moisture separators provided one after the after cooler and second one after chilling tank .The moisture condensed as water will be separated and drained once regularly.

6. Chilling Tank and Chilling Unit :

Chilling tank is cylindrical tank fitted with air coil and refrigeration coils. The water is cooled by chilling unit and refrigeration coils. In this unit air is further cooled.

7. Oil Adsorber:

Oil adsorber is packed with activated alumina balls . Here the oil vapour carried over by compressor will be removed. It is desirable to drain moisture from the bottom of the oil adsorber at regular intervals and also change the alumina after a specified period.

8. Molecular Seive Driers :

It is twin vessel driers both are filled with molecular sieves. As the process air passes through molecular sieves, the molecular sieves adsorb water vapour and carbon – di- oxide (Co2) from the air and make the air dry. After about 10 hours the molecular sieves become saturated and it will have to be regenerated by blowing hot air or nitrogen. Once the hot gas is blown through the saturated molecular sieves the CO2 and water vapour discharged and the drier is ready to use again.

9. Dust filter:

Dry air is filtered in this unit by a special material and prevents any dust particles entering the air separation unit.

10. Defrost Heater:

Despite purification and filtration of air some water vapour and CO2 will get past the molecular sieve driers and enter the air separation unit and may be deposited in the tubes of heat exchangers, valves and L.O. pump filters. To remove this deposit, defrosting of the plant is carried out. For this dry air after heating in defrost heater passed inside the air separation unit and l.o. pump and deposits will be melted and removed.

12. Expansion Engine:

This is a vertical single acting reciprocating type engine. This produces the cold required for operating the plant. The high-pressure air enters through inlet valve at the start of downward stroke of the piston and expands. During upward stroke outlet valve opens and the expanded air pushed out side. The Electric Motor is used to start the engine initially, thereafter the engine is moved by the air pressure itself and the air gets cooled. This cooling is more than the expansion valves. The temperature drops in this engine in 50°C to 70°C depending on air pressure, temperature and inlet cam position.

13. Liquid Nitrogen Pump:

14. Filling Manifolds