Ultra high-purity nitrogen generator MRN series

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Product overview
MR system produces nitrogen on site from compressed air and delivers a continuous flow to enclosed or affected areas to reduce oxygen concentration and enable sustained inerting. Available in fixed, skid-mounted, containerized or mobile configurations to suit operational and access constraints.

Industry requirements

• Continuous high flow: continuous and peak flow rates defined according to area volume, initial O₂ level and inerting target.
• Fixed or mobile deployment: layout selected based on injection points, emergency backup needs and site access.
• On-site nitrogen generation: reduces dependence on delivered gas cylinders and associated logistics.

Principle of operation
Compressed air is pre-treated to remove particles, droplets and oil, then dried as required before entering MRN membrane modules. Nitrogen-enriched permeate is buffered or stored and then supplied to injection points. Optional boosting unit provided when project pressure requirements exceed standard outlet pressure.

System solutions
Systems can be supplied as fixed, skid, containerized or mobile units. Scope is defined by injection pressure, piping distance, power availability, compressed air quality and environmental/site constraints.

Process flow
Compressed air → Filtration → Air drying → MRN membrane separation → Buffer / storage → (optional boosting) → Point of use

System components

• Compressed air inlet
• Filtration unit
• Air drying unit
• MRN nitrogen membrane modules
• Buffer or storage interfaces
• System control and gas delivery interfaces
• Fixed, skid, containerized or mobile base

Key features

• Covers continuous nitrogen injection tasks from 300 to 5000 Nm³/h.
• Nitrogen purity range 95–99.9% depending on inerting targets and operating conditions.
• Deployment adaptable to fixed or mobile arrangements according to injection points and site constraints.

Optional configurations

• Adsorption deep drying (for lower pressure dew points when required).
• Mobile base for emergency or backup mobile nitrogen supply tasks.
• Buffering and storage sized to match continuous and peak demand.

Typical applications

• Inerting of goaf and enclosed voids
• Prevention of coal spontaneous combustion
• Continuous nitrogen injection for fire zones control
• Emergency or backup mobile nitrogen supply

Data required for selection

• Volume of mine area or compartment and injection point locations
• Initial O₂ and target O₂ concentration
• Continuous and peak flow rates
• Injection pressure and piping distances
• Fixed or mobile deployment preference
• Site power, compressed air quality and environmental conditions
• Hazardous area / mining certification requirements

Specifications / characteristics

• Product model: MRN
• N₂ flow: 300–5000 Nm³/h
• N₂ purity: 95–99.9%
• Outlet pressure: 0.1–1 MPa(g)
• Drying system achievable min. pressure dew point: -70 °C (with optional adsorption deep drying)
• Available configurations: fixed, skid-mounted, containerized or mobile