Products introduction
A CNG Gas Production Plant is an integrated industrial system designed to purify, compress, and store natural gas into high-pressure CNG (20–25 MPa) for vehicle fueling, industrial gas supply, and distributed energy applications.
Key Technical Parameters
|
Item |
Specification |
|
Plant Type |
CNG Gas Production Plant (Integrated Gas Purification + Multi-stage Compression + Storage System) |
|
Capacity Range |
3,000 – 100,000 Nm³/d |
|
Feed Gas Pressure |
0.3 – 1.0 MPaG (typical inlet condition) |
|
Discharge Pressure |
20.0 – 25.0 MPaG |
|
Methane Content (CH₄) |
≥ 95% (vol.) |
|
Hydrogen Sulfide (H₂S) |
≤ 20 mg/Nm³ |
|
Water Content |
≤ 10 ppm (after dehydration system) |
|
CO₂ Content (design basis) |
≤ 3–5% (project-dependent adjustment) |
|
Solid Particle Size |
≤ 5 μm (after inlet filtration) |
|
Compression Type |
Multi-stage reciprocating compression system |
|
Compression Stages |
3 – 5 stages (design optimized based on pressure ratio) |
|
Intercooling System |
Air-cooled / Water-cooled intercoolers between stages |
|
Discharge Temperature |
≤ 40°C |
|
Specific Energy Consumption |
≤ 0.12 - 0.15 KWh/Nm³ (Inlet pressure dependent) |
|
Operating Mode |
Continuous automatic operation (PLC-controlled) |
|
Turn-down Ratio |
30% – 100% load adjustment capability |
|
Start-up Time |
30 – 60 minutes to stable operation |
|
Storage System |
High-pressure tube bundle / cylinder cascade storage |
|
Storage Pressure |
20 – 25 MPa (working), 25 – 30 MPa (design) |
|
Gas Dispensing Pressure |
Vehicle fueling: ~20 MPa regulated / Industrial: 1.0–10.0 MPa adjustable |
|
Control System |
PLC + SCADA (optional remote monitoring integration) |
|
Power Supply |
380V / 6kV / 10kV (project dependent) |
|
Cooling Method |
Air cooling (standard) / Water cooling (optional) |
|
Safety System |
ESD system, overpressure protection, gas detection system |
|
Design Standards |
ASME VIII / ISO 9001 / API / EN / GB (project-specific selection) |
|
Pressure Vessel Material |
34CrMo4 / ASTM high-strength alloy steel |
|
Piping Standard |
ASME / ASTM high-pressure seamless steel piping |
|
Welding Inspection |
100% NDT for critical welds (UT / RT) |
|
Design Life |
≥ 20 years |
|
MTBF (Reliability) |
≥ 10,000 operating hours |
Working Principle
RAW NATURAL GAS (0.3–1.0 MPa)
↓
Gas Filtration Unit
(removal of solids, liquids, free oil)
↓
Gas Purification System
(dehydration + desulfurization)
↓
Multi-Stage Compression System
(3–5 stage pressure increase with intercooling)
↓
High-Pressure Storage System
(tube bundle / cylinder cascade buffering)
↓
Gas Dispensing System
(vehicle fueling / industrial supply)
↓
FINAL PRODUCT: CNG (20–25 MPa, CH₄ ≥ 95%)
Core Advantages
- Welded steel skid base structure with corrosion-resistant coating for outdoor installation.
- Multi-stage reciprocating compression system with staged pressure increase design.
- Interstage cooling system using air-cooled or water-cooled heat exchangers.
- Inlet gas filtration module for solids, liquids, and free oil removal.
- Molecular sieve dehydration system for moisture control in high-pressure operation.
- H₂S removal system based on an adsorption or chemical treatment process.
- High-pressure storage system using tube bundle or cylinder cascade configuration.
- PLC-based automatic control system for integrated plant operation.
- Safety system including ESD, overpressure protection, and gas detection functions.
Engineering Capabilities
- Process simulation using HYSYS for performance validation
- Design compliance with ISO, GB, ASME, and EN standards
- Full material traceability for pressure components
- Non-destructive testing (UT / RT) for welded pipelines
- Factory Acceptance Test (FAT) with 72-hour continuous operation
Manufacturing Quality Control
- ISO 9001 quality management system
- Material inspection & traceability
- Pressure testing for all critical equipment
- Welding inspection with NDT methods
- Factory acceptance testing before shipment
After-Sales Service
- 24/7 technical support response
- Initial technical feedback within 8 hours
- Remote troubleshooting within 24 hours
- Preventive maintenance and system inspection programs
- Spare parts supply and lifecycle support
FAQ
Q: What installation format is available for the system?
A: The plant is supplied in skid-mounted modular units for transportation, installation, and integration with existing gas infrastructure.
Q: Can the system operate under different gas compositions?
A: Yes. The pretreatment system is designed to handle variations in natural gas composition within project-defined limits.
Q: Is the system scalable after installation?
A: Yes. Capacity can be expanded by adding compression or storage modules.
Q: What is included in the project delivery scope?
A: Engineering, fabrication, factory testing, and commissioning support, with optional on-site installation assistance.
Q: What civil work and utilities are required from the buyer's side before installation?
A: The buyer only needs to prepare a flat concrete foundation based on our load-bearing drawings, bring the raw natural gas pipeline to the skid boundary, and provide the designated electrical power supply. All internal piping, wiring, and control integration are already completed inside our skids.
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