Product Overview
The Liquefied Natural Gas (LNG) Plant is a fully integrated system for natural gas purification, cryogenic liquefaction, storage, and distribution.
Technical Specifications
|
Parameter |
Specification |
|
Annual Capacity |
50,000 – 10,000,000 tons/year |
|
Methane Content (CH₄) |
≥ 99.0% (Vol) |
|
Nitrogen Content (N₂) |
≤ 0.5% |
|
Carbon Dioxide (CO₂) |
≤ 50 ppm |
|
Feed Gas Pressure |
0.5 – 5.0 MPa |
|
Operating Pressure |
4.0 – 7.0 MPa |
|
Liquefaction Temperature |
-162℃ |
|
Boil-off Gas (BOG) |
≤ 0.15% per day |
|
Heavy Hydrocarbon Content |
≤ 0.1% (C₂⁺) |
|
Mercury Content |
< 0.01 μg/Nm³ |
|
Storage Tank Type |
Insulated cryogenic tank |
|
Storage Capacity |
Customizable |
|
Refrigeration Cycle Options |
C3/MRC, AP-X, Cascade, SMR, FLNG |
|
Start-up Time |
Typically 24–48h |
|
Material Specification |
304L stainless steel, Aluminum alloy 5083 |
|
Energy Consumption |
≤ 0.3 kWh/Nm³ |
|
Plant Layout |
Modular / Skid-mounted |
Working principle
Raw Natural Gas Feed
→ Feed Gas Compression
→ Dehydration & Desulfurization
→ Heavy Hydrocarbon Removal
→ Mercury Removal
→ Cryogenic Liquefaction (-162°C)
→ LNG Storage & BOG Recovery
→ LNG Loading & Distribution
→ Finished LNG Product (CH₄ ≥ 99.0%)
Core Features
- Aluminum alloy cryogenic heat exchanger system for low-temperature liquefaction duty.
- Molecular sieve dehydration unit for deep moisture removal before cryogenic processing.
- Heavy hydrocarbon separation section for C₂+ component removal before liquefaction.
- Mercury adsorption system utilizing sulfur-impregnated activated carbon technology.
- Multi-stage refrigeration system with integrated refrigerant compression and circulation equipment.
- High-efficiency compressor trains for feed gas compression and refrigerant handling.
- Vacuum-insulated LNG storage system with integrated boil-off gas recovery facilities.
LNG Liquefaction Technologies
|
Technology |
Principle |
Advantages |
Typical Scale |
|
C3/MRC |
Propane pre-cooling + mixed refrigerant |
Mature, high efficiency |
Large ≥2 million t/y |
|
AP-X |
Expanded mixed refrigerant |
Lower energy consumption |
Ultra-large ≥5 million t/y |
|
Cascade |
Three-stage (propane, ethylene, methane) |
Reliable, simple operation |
Medium 50,000–1 million t/y |
|
SMR |
Single mixed refrigerant |
Compact, low investment |
Small ≤500,000 t/y |
|
FLNG |
Offshore platform LNG processing |
No onshore infrastructure |
Offshore gas fields |
Operational Considerations
Material Compliance
Cryogenic-grade 304L stainless steel and aluminum alloy 5083.
Maintenance
Regular heat exchanger cleaning and refrigerant replenishment are recommended to maintain efficiency.
Reliability
Start-up success rate 100%, stable operation ≥95% (excluding planned maintenance).
Integration
Compatible with existing gas supply, storage, and distribution systems.
Technical Documentation
- Detailed process flow diagrams
- LNG plant specifications
- Cryogenic material certificates
- Operational and safety guidelines
Frequently Asked Questions
Q: Can the LNG plant be customized for different production capacities?
A: Plant capacity, storage configuration, liquefaction technology, and process layout can be customized according to feed gas composition, production targets, and project requirements.
Q: What are the site and installation requirements?
A: The plant can be supplied as modular units or skid-mounted packages, supporting simplified transportation, site preparation, and phased installation.
Q: How is maintenance managed throughout plant operation?
A: Maintenance programs typically include heat exchanger cleaning, refrigerant management, equipment inspection, and system performance monitoring. Service schedules can be adjusted according to operating conditions and production requirements.
Q: Can the LNG plant be integrated with existing infrastructure?
A: The plant can be integrated with existing natural gas supply networks, LNG storage facilities, loading systems, and downstream distribution infrastructure.
Q: How is boil-off gas (BOG) handled during LNG storage?
A: The integrated BOG recovery system captures evaporated gas and returns it to the liquefaction process or utilizes it as fuel, reducing product losses and improving overall operational efficiency.
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