mobile membrane nitrogen generation system for pipe blowing

The mobile membrane nitrogen system adopts the combination of screw low-pressure air compressor, membrane nitrogen separator, and high-pressure nitrogen booster compressor, which can provide high-purity nitrogen with a flow rate of 20Nm³/min and a pressure of 15 to 35MPa.

Skid-Mounted Modular Design

The system adopts a skid-mounted modular design, consisting of two independent skids:
1. First skid: Includes low pressure air compressor module and membrane separation nitrogen module.
2. Second skid: Includes high-pressure nitrogen pressurization module.
The equipment features an air-cooled design, is driven by a diesel engine, equipped with a metal cover, and can be mounted on a vehicle chassis—making it suitable for oilfield and other field operation environments.

Features of Mobile Membrane Nitrogen System

1. Modular design: Each component operates independently for easy transportation, installation, and maintenance.
2. Efficient nitrogen production: Adopts membrane separation technology to quickly and stably produce more than 95% high purity nitrogen.
3. No chemicals required: Pure physical separation with no pollution or by-products—environmentally friendly and energy-saving.
4. High pressure output: Provides high pressure nitrogen up to 35MPa for various industrial needs.
5. Adaptable to harsh environments: Air-cooled system requires no water, suitable for desert, marine, cold, or high temperature environments.
6. Widely applicable: Usable in oil and gas extraction, pipeline maintenance, coal bed methane recovery, LNG stations, and more.

Working Principle of Mobile Membrane Nitrogen Generation System

1. Air compression: Atmospheric air is pressurized to 1.4MPa by a diesel-driven screw air compressor, then filtered and dried to obtain clean compressed air.
2. Membrane separation nitrogen production: Clean compressed air enters the membrane nitrogen generator, where oxygen, carbon dioxide, and water vapor are discharged by membrane diffusion, while nitrogen is retained. This results in 1.2MPa, ≥95% purity nitrogen.
3. High pressure pressurization: Low-pressure nitrogen is boosted by an air-cooled piston booster to 15–35MPa for high-pressure applications.

Composition of Mobile Membrane Nitrogen System

• Air compressor unit: Diesel or electric-driven screw compressor with local control system.
• Membrane nitrogen generation unit: Air purification system, membrane module, and central control system.
• High-pressure nitrogen booster: Boosts nitrogen to 35MPa for high-pressure supply needs.
• Auxiliary devices: Diesel generators, fuel tanks, containers/skid modules (single/double/multiple skid), and ancillary equipment such as foam metering pumps as needed.

Application Areas of Mobile Membrane Nitrogen System

1. Oil field oil recovery & enhancement:
   • Maintain oil well pressure, prevent collapse
   • Nitrogen drive to enhance crude oil recovery
   • Gas lift operations, accident reduction, increased production
   • Acidizing/fracturing for formation decommissioning and enhanced production
   • Steam throughput for improved thermal recovery
   • Mud density control for special drilling
   • Well cleaning, contamination reduction
   • Surfactant carrier for optimized well operations
2. Pipeline maintenance:
   • Pipeline blowing to remove water/impurities
   • Pressure testing for safety
   • Nitrogen replacement in flammable pipelines
   • Emergency repair for leakage control
   • Gas sealing protection to prevent corrosion/oxidation
3. Other industrial applications:
   • Coal bed methane mining for gas recovery
   • Natural gas gathering stations for safe storage/transport
   • LNG receiving stations for low temperature storage and nitrogen sealing
   • Offshore drilling rigs for explosion-proof/inert environments
   • Natural gas purification plants for desulfurization, dehydration, nitrogen replacement, etc.