Product Introduction
A Natural Gas Processing Plant, also known as a Natural Gas Treatment Plant or Natural Gas Purification Plant, is used to remove water, acid gases, nitrogen, and heavy hydrocarbons from raw natural gas.
Technical Specifications
|
Item |
Specification |
|
Plant Capacity |
100 – 2,000,000 Nm³/day |
|
Operating Pressure |
2.0 – 10.0 MPaG |
|
Feed Gas Pressure |
0.5 – 5.0 MPa |
|
Product Methane Content |
CH₄ ≥ 95% (Vol.) |
|
Optimized Methane Purity |
Up to CH₄ ≥ 98% |
|
Product Water Content |
< 100 mg/Nm³ |
|
Total Sulfur Content |
< 20 mg/Nm³ |
|
Carbon Dioxide Content |
< 3% (Vol.) |
|
Nitrogen Content (Optional) |
< 2% (Vol.) |
|
Heavy Hydrocarbon Recovery |
Ethane, propane, butane, natural gasoline (depending on feed gas) |
|
Operating Mode |
Continuous operation |
|
Typical Operating Temperature |
-20°C to 60°C (ambient and process dependent) |
|
Power Requirement |
50 kW – 20 MW (depending on plant size) |
|
Plant Footprint |
Variable; modular design allows compact layout for small/medium plants |
|
Instrumentation & Control |
PLC / DCS-based automation for process monitoring and safety interlocks |
|
Start-Up Time |
Typically 3–6 weeks after mechanical completion |
|
Maintenance Cycle |
Adsorbent/catalyst replacement every 2–4 years |
|
By-Product Handling |
Sulfur, LPG, natural gasoline storage and offloading systems |
|
Compliance Standards |
GB, API, ASME, ISO, EN (depending on plant location and client requirements) |
Working Principle
Raw Natural Gas Feed
→ Feed Gas Compression (0.5–5.0 MPa to 2.0–10.0 MPaG)
→ Dehydration Unit
→ Acid Gas Removal Unit (H₂S & CO₂)
→ Cryogenic Processing Unit
→ Gas-Liquid Separation
→ Hydrocarbon Fractionation Unit
→ Nitrogen Rejection Unit (Optional)
→ Product Gas Metering
→ Pipeline-Quality Natural Gas (CH₄ ≥95%)
By-Product Streams:
Hydrocarbon Fractionation
→ Ethane Recovery (Optional)
→ LPG Recovery
→ Natural Gasoline Recovery
Acid Gas Treatment
→ Sulfur Recovery (Depending on Process Configuration)
Key Features
- Modular skid-mounted process units for transportation and site installation.
- Welded structural steel framework supporting integrated processing equipment.
- Stainless steel process piping for gas treatment and hydrocarbon handling sections.
- Independent dehydration, acid gas removal, and hydrocarbon recovery modules.
- Insulated cryogenic vessels and low-temperature piping assemblies.
- Vertical adsorption vessels with replaceable molecular sieve beds.
- Heat exchanger assemblies for process cooling and thermal integration.
- Dedicated gas-liquid separation vessels for hydrocarbon fractionation stages.
- Corrosion-resistant protective coatings on exposed structural components.
- Flanged equipment and piping connections for maintenance isolation.
Available Processing Technologies
|
Technology |
Core Principle |
Advantages |
Typical Applications |
|
Amine Absorption + Cryogenic Fractionation |
Acid gas absorption combined with low-temperature hydrocarbon separation |
Mature technology, high processing capacity |
Large gas fields with high acid gas content |
|
Adsorption-Based Processing |
Molecular sieves or activated carbon remove contaminants |
Lower energy consumption, simple operation |
Small-scale gas processing projects |
|
Membrane Separation |
Selective permeation of contaminants through membranes |
Compact footprint, modular design |
Distributed gas processing facilities |
|
Selexol Solvent Absorption |
Physical solvent removes acid gases |
Effective for sour gas treatment |
High-H₂S natural gas fields |
|
Pressure Swing Adsorption (PSA) |
Selective methane separation using adsorbents |
High methane purity, flexible operation |
Small and medium gas purification systems |
Applications
- Conventional natural gas fields
- Associated petroleum gas recovery projects
- Shale gas processing facilities
- Coalbed methane treatment projects
- Industrial fuel gas supply systems
- Gas gathering and transmission stations
- LNG feed gas preparation
- CNG feed gas preparation
- Distributed energy projects
- Remote gas monetization projects
Quality Assurance
Industrial Gas Engineering Expertise
Plant design and manufacturing are supported by experience in industrial gas systems and large-scale natural gas processing projects.
Customized Engineering Solutions
Process configuration, equipment selection, and layout are tailored according to feed gas composition, product specifications, site conditions, and project requirements.
Compliance with International Standards
Pressure vessels, piping, and key equipment are fabricated and tested according to GB, API, ASME, ISO, and EN standards.
Continuous Performance Verification
Factory testing, system integration checks, and commissioning procedures verify product gas quality, process stability, and operational reliability.
Energy Efficiency and Operational Stability
The plant incorporates energy integration measures, including heat recovery and process efficiency optimization, to support continuous operation.
Documentation and Certification
Comprehensive documentation, including material certificates, test reports, and operation manuals, is provided to support project execution and compliance verification.
Lifecycle Technical Support
Technical guidance, commissioning assistance, and maintenance support are available throughout the plant operating lifecycle.
FAQ
Q: What information is required for preliminary project evaluation?
A: Feed gas composition, processing capacity, product gas specifications, operating pressure, and project location are typically required.
Q: Can the plant be configured for different natural gas compositions?
A: Yes. Process units can be selected and configured according to water content, carbon dioxide concentration, hydrogen sulfide content, nitrogen levels, and hydrocarbon composition.
Q: What factors determine the processing technology selection?
A: Technology selection depends on feed gas characteristics, product specifications, hydrocarbon recovery requirements, plant capacity, and operating objectives.
Q: What are the primary maintenance requirements during operation?
A: Routine maintenance typically includes inspection of compressors, valves, instrumentation, heat exchangers, and adsorption systems.
Q: Can the plant be designed for future capacity expansion?
A: Yes. Modular process layouts can be incorporated during the engineering stage to facilitate future expansion projects.
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