Based on economical, proven and reliable technology, the PSA Nitrogen Gas Plant offered by us produces nitrogen from atmospheric air and therefore the cost of nitrogen generation is very low. Offering simple operation and easy installation, works only on electrical power without the utilization of petroleum fuels. Requiring easy maintenance, our PSA Nitrogen Gas Generation Plant guarantees a long lasting life of more than 10 years on continuous operation basis. We offer these machines in various technical specifications as per the application needs of our clients.
WORKING OF NITROGEN GAS GENERATORS / NITROGEN GAS PLANT
Molecular Sieves Separation Technique is used to produce Nitrogen gas from atmospheric air. Carbon Molecular Sieves which have the ability to preferentially remove oxygen from air are used in these generators.
The Nitrogen Gas Generators consist of 2-Beds filled with Carbon Molecular Sieves. The process of “PRESSURE SWING ADSORPTION” (PSA) is employed where compressed air is passed through the generator, and Nitrogen comes out as product gas from one bed. The other bed is simultaneously regenerated by de pressurisation to atmospheric pressure.
NITROGEN PURITY
Nitrogen of purity in the range of 99% to 99.9999% can be produced through this Generator. Simple PSA Unit produces raw Nitrogen of 99% purity. By adding Purification Modules to this basic unit, high purity Nitrogen is produced. Following are the Generator Models to produce different Nitrogen purity.
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NITROGEN GAS GENERATORS / NITROGEN GAS PLANT MODELS.
| MS MODEL | DX MODEL | COPPER-DX MODEL | | This is the basic model of Nitrogen Gas Plant, used to produce commercial grade Nitrogen of 99% purity. It provides true value for money. By increasing the quantity of Carbon Molecular Sieves, even 99.999% purity Nitrogen can be produced from this model. Higher the purity, higher would be the running cost. This model is recommended for purity upto 99.9% only. This model is commonly used for purging/intertizing applications. | This model of nitrogen gas generators produce Nitrogen with oxygen less that 1-ppm and minimal Hydrogen which varies around 0.5 to 1% which is desirable as reducing constituent in most of Heat Treatment applications. This model is recommended for use in Metallurgical industries to provide oxygen free Nitrogen gas for Heat Treatment Furnaces. By adding a palladium catalyst based Deoxo Purification Module in MODEL-MS Generator, it becomes DX-Model This model also finds applications in Chemical/Electronic Industries | The model contains an extra Nitrogen Purification Module based on Copper Deoxo Catalyst. This model finds application in synthetic fiber, optical cables and electronic industries. Cost of production of Nitrogen from this model is highest. It produces very pure Nitrogen gas which is free from Oxygen as well as Hydrogen. |
| GAS COMPOSITION: | MS-L | MS-H | DX | COPPER-DX | | Oxygen | 0.5 to 4% | 10-ppm to 0.5% | 1 to 3ppm (max) | 1-ppm (max) | | Hydrogen | Nil | Nil | 0.5% or more | Nil | | Nitrogen | 96-99.5% | 99.5 to 99.999% | Balance | 99.9999% | | Dew Point | (-)40°C to (-) 80°C | (-)60°C to (-) 80°C | (-)40°C to (-)80°C | (-)40°C to (-)80°C | | Applications: | As Inert Gas in Chemical Industries, Food & Pharmaceutical Industries, for fire control in Coal Mines etc. | As Inert Gas in Chemical Food, Pharmaceutical Industries, Heat Treatment Furnaces, Electronic, Synthetic, Fibre, Industries | As Inert Gas in Chemical & Pharmaceutical Industries In applications where oxygen impurity is not tolerable. | As Inert Gas in Electronic, Synthetic Fiber, Hitech Industries where one needs Ultra High Purity gases. |
FLOW SCHEME
ADVANTAGES
- Automatic Start and stop. Start-up time is only 5-Minutes.
- Nitrogen gas supply always under your control.
- Self-contained Skid mounted units for easy site installation.
- Very low maintenance costs.
- Very high reliability to run un-attended for months and months.
- Carbon Molecular Sieves life is minimum 15-Years and in most cases it lasts the whole life time of Gas Generator, never requiring replacement.
FLOW SCHEME
Nitrogen Gas Plant or Nitrogen Gas Generators are tailor-made equipment and are manufactured exactly as per customer’s requirements. However, standard units are available in the capacity of 1, 2, 5, 10, 25, 75, 100, 150, 200, 300 and 500 NM³/hr. These Gas Generators are manufactured in all sizes upto 1000NM³/hr capacities.
NITROGEN PRESSURE
Standard Nitrogen Gas Generators produce Nitrogen at 5.5Kg/cm²g pressure. This pressure comes automatically as feed air pressure to the PSA Unit is 7Kg/cm²g. By increasing feed air pressure to 10Kg/cm²g, Nitrogen can be produced at 8.5Kg/cm²g. pressure also. But, at high pressure operation, de pressurisation losses during regeneration are high which result in high operation cost. It is most economical to run Nitrogen Generator at 7Kg/cm²g pressure and produce Nitrogen at 5.5Kg/cm²g. pressure. If Nitrogen is needed at high pressures, Nitrogen booster compressor is provided after the gas generator. By this addition, it is possible to compress Nitrogen gas to any high pressures.
NITROGEN STORAGE TANK
After the Gas Generator, Nitrogen Storage Tank is recommended to meet fluctuating Nitrogen demands. Storage Tank always receives Nitrogen from the Gas Generator and supplies to your process as per demand. Normally Nitrogen Storage System of 1-hour capacity is considered to be adequate. For high storage requirements, a Nitrogen Booster Compressor is provided to store the gas at high pressures to keep storage Tank size smaller. Nitrogen Storage Tanks are fabricated from Boiler Quality Steel under 3rd party inspection. The Gas Generator automatically trips when pressure reaches the set value. When pressure in the tank falls, Gas Generator re-starts Nitrogen production automatically.
HYDROGEN REQUIREMENT
In high purity Nitrogen Gas Generators, a Deoxo Unit is provided in which oxygen is removed by reacting with Hydrogen. This Hydrogen can be supplied either from Hydrogen Cylinders or captive Hydrogen Generator based on Ammonia Cracking Process. In smaller capacity Nitrogen Gas Generators, Hydrogen requirement is very little, therefore Hydrogen Cylinders are most economical. But, in bigger capacity Nitrogen Gas Generators Ammonia Cracking unit works out to be more economical. Cost of Hydrogen generation by Ammonia Cracking process is only Rs. 10/- per cubic meter whereas cylinder hydrogen gas costs Rs. 25/- per cubic meter. Hydrogen requirement is around 2.5% of Nitrogen Capacity.
NITROGEN CYLINDERS V/S NITROGEN GAS GENERATORS
NITROGEN CYLINDERS
- Cylinder Nitrogen Costs Rs.10/- to Rs. 15/-per Cubic Meter.
- Transfer and handling of Gas Cylinders is very cumbersome due to high pressure risks.
- Dependency on availability of Nitrogen Cylinders all the time.
- Nitrogen purity in Cylinders is never reliable and changes from cylinder to cylinder.
NITROGEN GAS GENERATORS
- Nitrogen Gas Generator gas costs Rs.2/- per NM³ only.
- In-house Nitrogen generation as and when needed and in any quantity.
- Continuous and reliable Nitrogen supply round the clock. Your production never suffers due to want of Nitrogen Gas.
- Nitrogen Purity is very steady and reliable.
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PRODUCTS
