Nitrogen Generator For Oil And Gas
This system uses either PSA (Pressure Swing Adsorption) or membrane separation technology, with the optimal configuration selected based on operating conditions. Each unit is engineered and reinforced to meet the specific requirements of the oil and gas industry, including:
- Enhanced vibration resistance and corrosion protection
- Marine-grade coatings and components compatible with offshore standards
- Containerized or modular skid-mounted construction
- Fully automated PLC control system
- Suitable for continuous 24/7 operation
The equipment is designed for use in onshore oilfields, offshore drilling platforms, FPSOs, refineries, and natural gas processing facilities, making it a typical engineering-grade nitrogen generator for oil and gas solution.
Working Principle and System Structure
1. PSA Working Principle (Common for Onshore Applications)
- Utilizes carbon molecular sieve (CMS) to separate oxygen and nitrogen based on adsorption selectivity.
- Nitrogen is produced through a cyclic process of pressurized adsorption and depressurized desorption.
- Achievable nitrogen purity ranges from 95% to 99.999%.
- Well-suited for oil and gas applications that require medium to high nitrogen purity.
2. Membrane Separation Principle (Common for Offshore Applications)
- Oxygen, moisture, and other light components permeate through the membrane at a faster rate.
- Nitrogen is retained within the membrane fibers and delivered as product gas.
- Ideal for offshore platforms, FPSOs, and scenarios where continuous and stable operation is critical.
System Structure
- Inlet air compression unit with filtration and pretreatment
- Adsorption towers or membrane modules
- Pressure regulation and buffer tanks
- PLC-based automatic control with touch-screen interface
- Instrumentation and safety interlocks
- Optional containerized, explosion-proof, or marine-coated configurations
The overall system is compact, easy to install, and suitable for offshore transportation, making it a reliable and widely used nitrogen generator for oil and gas configuration in the industry.
Gas Purity and Flow Rate Parameters
|
Item |
Technical Specification |
|
Nitrogen Purity |
95% / 99% / 99.5% / 99.9% / 99.999% (optional) |
|
Nitrogen Flow Rate |
5 Nm³/h – 5,000 Nm³/h (customized per project requirements) |
|
Nitrogen Dew Point |
–40°C to –70°C (pressure dew point) |
|
Oxygen Content Control |
≤10 ppm (available for high-purity configurations) |
Operating Environment and Working Conditions
|
Operating Parameter |
Value Range |
|
Ambient Temperature |
–10°C to +45°C (optional wide-temperature design: –25°C to +55°C) |
|
Working Pressure |
0.6 – 1.0 MPa (expandable depending on system configuration) |
|
Offshore Compatibility |
C5 anti-corrosion grade / Marine coating available |
|
Noise Level |
≤72 dB (depending on model) |
Energy Consumption and Operating Costs
|
Item |
Typical Range |
|
Specific Energy Consumption (PSA, 99.5% Purity) |
0.25 – 0.35 kWh/Nm³ |
|
Specific Energy Consumption (Membrane, 95% Purity) |
0.20 – 0.28 kWh/Nm³ |
|
Operating Mode |
Continuous 24/7 operation |
|
Cost Advantage |
30%–70% lower operating cost compared with liquid nitrogen supply |
Technical Specifications
|
Module |
Technical Description |
|
Separation Method |
PSA or membrane separation |
|
Control System |
PLC (Siemens or Schneider optional) |
|
Instrumentation |
Flow meter, oxygen analyzer, pressure and temperature sensors |
|
Adsorbent Material |
High-performance carbon molecular sieve (imported type optional) |
|
Power Supply |
380V/50Hz or customized to local standards |
|
Structural Form |
Skid-mounted / Containerized / Explosion-proof cabinet |
|
Selection Criteria |
Nitrogen purity, flow rate, site layout, environmental conditions, and oil & gas process requirements |
Industrial Applications and Engineering Case Studies
Typical Application Scenarios
- Nitrogen blanketing and inerting for offshore platforms
- Gas displacement and backup supply for foam fire protection on FPSOs
- Nitrogen sealing for refining and petrochemical units
- Pipeline purging and pressure testing
- Explosion-proof operating conditions in natural gas processing facilities
- Tank blanketing systems for oil storage areas
Representative Engineering Cases
- 600 Nm³/h PSA nitrogen generation system for a Middle East oilfield
- 300 Nm³/h membrane nitrogen package for an offshore FPSO in West Africa
- 99% purity skid-mounted nitrogen system for an offshore platform in Southeast Asia
- Nitrogen blanketing system retrofit project for a South American refinery
- Continuous-operation nitrogen unit for a domestic LNG processing facility
All of these projects are designed based on the nitrogen generator for oil and gas configuration, with particular emphasis on reliability, continuous operation, and enhanced marine-grade corrosion resistance.
International Certifications and Design Standards
The equipment can be designed and manufactured in accordance with global oil and gas industry regulations and standards, including:
- ISO 9001 Quality Management System
- ISO 8573 Compressed Air Quality Standard
- ASME Pressure Vessel Code (U Stamp available upon request)
- CE Compliance for the European Union
- IEC / EX Explosion-Proof Electrical Standards (project-specific)
- DNV / ABS / BV Marine Coating options for offshore applications
- Complete factory acceptance documentation, including pressure testing and leak testing
Shenger Gas specializes in industrial gas equipment and nitrogen generation systems, covering PSA, membrane separation, and cryogenic technologies. For the oil and gas sector, we provide customized engineering services-including design, manufacturing, commissioning, and operational support-for onshore oilfields, LNG facilities, refineries, and offshore platforms.
Our goal is to deliver stable, safe, and long-term nitrogen generator for oil and gas solutions that ensure continuous and cost-efficient nitrogen supply without relying on external liquid nitrogen logistics, enabling both onshore plants and offshore installations to operate reliably under varying process conditions.
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