MR Membrane Modules
Four module families for nitrogen, oxygen enrichment, CO₂ separation and gas dehumidification.
MR Hollow-Fiber Gas Separation Membranes
From membrane modules to complete gas separation systems
Mairui supplies MRN nitrogen, MRO oxygen enrichment, MRB CO₂ separation and MRD dehydration membrane modules. We also design the pretreatment, membrane trains and controls required for complete packaged systems.
Membrane Technology
Gas separation driven by different permeation rates
A pressure difference drives mixed gas through hollow fibers. Fast gases cross the membrane wall first, while slower gases remain on the high-pressure side. Membrane chemistry, pressure, temperature and flow determine product purity and recovery.
Products & Systems
Products and Systems
MR modules lead to membrane packages, filtration, drying and integration, with PSA retained as a separate product line.
Membrane Gas Separation Systems
Packaged membrane trains with required pretreatment, piping, valves, gas analysis and controls.
Filtration, Drying and Integration
Compressed-air filters, refrigerated dryers and desiccant dryers for membrane protection or stand-alone air treatment.
PSA Nitrogen and Oxygen
Adsorption-based nitrogen and oxygen generation equipment for applications suited to PSA.
System Integration
The membrane performs the separation; the operating data defines the system
A membrane module is one part of the process. A complete package may also require compression, filtration, drying, temperature control, valves, gas analysis and PLC controls. Mairui defines those boundaries from feed quality and product specifications, then states the supply scope and site interfaces in the proposal.
Applications
Six Main Application Areas
Enter through the actual industrial process duty.
Oil & Gas
Nitrogen inerting, blanketing and purging; CO₂ removal and gas dehydration.
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Marine & Offshore
Onboard membrane nitrogen for tank inerting, purging and offshore facilities.
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Biogas Upgrading
CO₂ removal from pretreated biogas for biomethane, RNG and Bio-CNG.
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CO₂ Removal & CCUS
Gas treatment where both product-gas specification and CO₂-stream destination matter.
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Laser Cutting & Welding
On-site nitrogen sized from material, laser power, purity, pressure and peak demand.
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Oxygen Enrichment
Oxygen-enriched air defined by target O₂ concentration, flow and downstream process.
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From Gas Data to Clear Technical Boundaries
One MR membrane platform
Four module families follow a consistent product and model structure.
Selection starts with gas data
Composition, flow, pressure, temperature and product targets feed the same membrane and process calculation.
Pretreatment is part of the design
Filtration, drying and contaminant limits are defined before membrane inlet.
Clear technical boundaries
Proposal states design basis, performance conditions, package scope, options and site interfaces.
Process Flow
Two common membrane process arrangements
The diagrams show process relationships, not a fixed equipment list for every project.
Typical Membrane Nitrogen / Oxygen Enrichment Process
Typical Two-Stage Biogas Upgrading Process
Start with the operating data
Send the gas composition, flow, pressure, temperature, required purity or dew point, and the final use of the product gas. We will use that data to identify the membrane, pretreatment and package scope.