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Membrane Nitrogen

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Technical Facts

Flow Range1 Nm3/hr to 5000 Nm3/hr
Nitrogen Purity

95% to 99.5%

Purity modulation feature is available.

Dew Point(-) 70°C
Pressure

Direct delivery pressure as high as 24 bar(g)

For most customers, 7 bar(g) is the standard delivery pressure.

Why Membrane Nitrogen Generators?

Membrane Nitrogen Gas Generators are suitable for high flow on-site Nitrogen generation needs. They are the perfect replacement for bulk supplies and expensive and erratic gas supply from merchants in cylinders or in liquid. Membranes are manufactured by our American Principals – MEDAL – Air Liquide, and are made to specifications which are very suitable for operation in tropical climates. MVS experience of more than a decade in supply of such systems, makes MVS – MEDAL Membrane Nitrogen generators the perfect choice for our customers.

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Membrane Nitrogen Generators are suitable for high flow Nitrogen requirements

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HOW IT WORKS

Atmosphere is made up of a variety of gases, with the most abundant gas being Nitrogen followed by Oxygen. Nitrogen makes up 78% of the atmosphere, however cannot be used as is without separation. Membrane Separation Process uses the principle of different rates of diffusion of gases through the membrane fibres. Gases diffusing at a faster rate, like water vapour and oxygen are exhausted through the vent port. Slower gases like Nitrogen continue through the membrane bores and are delivered as the product gas at the product end of the membrane.

Air Liquide's membrane technology is hollow polymeric fibres comprised of a core which is used for mechanical strength and a sheath optimized for the separation of gas. A module of 12-inch contains between 0.5 to 1 million fibers that would extend for 750 miles when laid end-to-end. Modules in membrane technology based generators may contain more than 1 million individual hollow fibers designed in cross flow and counter flow designs. This design allows flexibility in meeting all pressure drop and performance constraints. Bundles are designed with high-performance fibers to enable operations at elevated/raised temperatures and extreme pressures. This allows for higher membrane productivity, fewer membranes, and lower system CAPEX.

Calculation of optimum Nitrogen production from membranes is complex. It depends on several factors that include pressure drop across the membrane feed air temperature and the volumetric flow of feed air, and desired purity at the outlet. We, at MVS, do the study for our customers and deliver an optimized and efficient system for on-site Nitrogen production.

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AMERICAN TECHNOLOGY & DESIGN

Air Liquide designs, engineers and manufactures hollow fiber membranes for Nitrogen production. Air Liquide’s membrane technology delivers uncompromising performance within a compact design. By utilizing a proven polymer blend and advanced hollow fiber technology of Air Liquide, MVS engineered solutions are able to provide customers with multiple technical solutions for gas separation and purification.

MEDAL™ membranes have a long product life, and are easy to operate, start up and shut down. MVS engineered solutions based on MEDAL™ technologies and solutions for hydrogen, nitrogen and natural gas systems are extensively used in the aerospace, oil and gas and chemical industries.

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CONTAINERIZED Mobility Solutions

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MVS is a leading supplier of mobile Nitrogen generation systems that are housed in standard sea-worthy containers. We have several such systems operating in oil-field applications in India and Middle East.

We also offer completely stand-alone systems that are diesel powered and do not require any external electricity. If the customer is able to provide electric power to our systems, then we can also provide containerized air compressors with adequate ducting and heat removal systems. Air intake filters are also typically fitted on these to avoid suction of large volumes of dust and other pollutants from ambient air.

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FAQ’S

Membrane systems offer purity ranging from 95% to 99.5%. This is dependent on feed air temperature, pressure drop across the system and feed air volume.

Continuous supervision is not needed. Once started, it can be left unattended. For membranes to produce Nitrogen, air compressor and optional cooling system for feed air need to be operational and Nitrogen flow starts automatically from the membrane modules that have no moving or electrical parts.

Yes, Nitrogen Generators are tailor made as per customer’s specifications of Nitrogen Purity and Nitrogen capacity.

Life of Membranes can be as high as around 20 years. It goes without saying that a well maintained gas generation system that is operated within specifications will run a very long time. Air quality is paramount and avoiding ingress of oil and dust into the membrane will ensure very long life of membrane.

Yes. The Gas generator is supplied fully assembled on steel frames which are kept on floor. You simply connect power and the Gas generator becomes ready for start-up. We provide services of Engineer to supervise its installation and commissioning at site.

The noise level is less than 75dbA at 1-meter distance. The total Gas Generator Package is “very silent”.

The “Maintenance Schedule” is given in our “Operation Manual”. The maintenance is limited to only replacement of filter elements and preventive maintenance in Air Compressor.

An optional On-line Oxygen Analyzer continuously monitors Nitrogen purity and shuts down the Gas generator automatically with alarm if purity drops below set limit. Customer can opt to operate the system at a higher purity, albeit at a lower flow rate.

Gas generator is designed to run continuously all 24-hours. But, if gas is not being consumed or consumption is low, pressure gradually builds up in Nitrogen Storage Tank. An automatic pressure switch stops the Gas generator. When pressure in the Nitrogen tank falls due to continuous gas consumption, the pressure switch automatically restarts the Gas generator.

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APPLICATIONS

Our PSA Nitrogen Gas Generators Are Widely Used Across Many Industries Including:

Tyre filling (Automotive, Aircrafts, Dumpers, Mine Trucks)
Filling rubber tyres with Nitrogen greatly enhances the life of the tyre due to reduction in oxidation and by lower leakage thereby resulting in stable pressure maintenance
Fuel Tank Inerting (Petrochemical Complexes, Chemical Factories, Aircrafts)
Headspace in fuel tanks containing air may cause flammable mixture presence and flammability can be reduced by flushing and filling fuel tanks with Nitrogen
Autoclaves and Furnaces
Flammability and combustion risk can be reduced by using Nitrogen in autoclaves and furnaces
Blanketing for many industries (adhesives, pesticides, agro, pharmaceuticals)
Applications that require low oxygen presence or inert atmosphere are perfectly suited for Nitrogen gas
Fire prevention (coal mines, mines)
Removal of atmospheric air by flushing with Nitrogen allows to effective fire prevention and fire fighting measures
Oil & Gas and Petrochemicals (Pigging, Blanketing, Headspace filling, Pipeline drying)
Handling of volatile chemicals and petrochemicals require presence of Nitrogen for safe handling of the process gas or liquid during various stages of handling
Laboratories (LCMS, Turbo Vap, GC, GCMS)
Large labs having centralized gas supply system benefit from onsite Nitrogen and Hydrogen gas generators for uninterrupted supply of gas
Offshore Platforms & FPSOs
Due to handling of highly flammable crudes and volatile gases, Nitrogen is an absolute must for fire prevention
Oil cargo ships and oil tankers
Storage and transportation of oil and crudes is risky and requires Nitrogen for creating a fire-safe environment
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