Usine de liquéfaction de GNL

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Usine de liquéfaction de GNL

Description

I. Core Basic Parameters (General & Capacity Classification)

Core Process Parameters

  • Liquefaction temperature: -162°C (atmospheric pressure)
  • Liquefaction processes: MRC (Mixed Refrigerant), propane pre-cooling + MRC, nitrogen expansion, cascade refrigeration
  • Feed gas pretreatment: CO₂ removal, H₂S removal, dehydration, de-heavy hydrocarbon, demercuration, compliant with GB 17820 / ISO 13686
  • BOG handling: BOG compressor + recondenser, recovery rate ≥ 95%
  • Storage tanks: atmospheric / low-pressure (0.2–0.8 MPa), inner tank 304L / 9%Ni steel, outer tank carbon steel with insulation
  • Power consumption: approx. 0.29–0.31 kWh/Nm³ for large-scale plants; slightly higher for small skid-mounted units
  • Control system: DCS + SIS, supporting remote monitoring and unattended operation
  • Small skid-mounted: 100,000–500,000 Nm³/d (36,000–180,000 t/y), small footprint, modular, fast commissioning
  • Medium-scale: 1,000,000–3,000,000 Nm³/d (360,000–1,080,000 t/y), suitable for regional supply / distributed energy
  • Large / extra-large: 5,000,000 Nm³/d + (1.8 million t/y +), single train up to 7.8 million t/y (Qatar)
  • Typical large plant: 2,000,000 Nm³/d (720,000 t/y), 2×30,000 m³ storage tanks, vaporization capacity 3,000,000 Nm³/d

Core: Energy Security + Low-Carbon Compliance

  • Pain point: Dependence on Russian pipeline gas; LNG import penetration over 65% with strong demand for terminals and storage.
  • Highlights:
  • Ensures energy supply security, supporting the EU’s REPowerEU strategy.
  • Low-sulfur, low-nitrogen, compliant with EU ETS and FuelEU Maritime.
  • Matches FSRU, terminal expansion and peak-shaving storage.
  • Stable supply with long-term contracts + spot trading to hedge price volatility.
  • North America (USA, Canada)
  • Low-cost shale gas supply; world’s largest LNG exporter (230 million t/y).
  • Modular construction reduces cost by 15–20%.
  • Main export markets: Europe (over 50%) and Asia-Pacific.
  • Latin America (Brazil, Argentina, Chile)
  • LNG used for emergency power generation during water shortage.
  • Replaces diesel / heavy oil for industry and city gas.
  • Small/medium LNG plants fit weak pipeline networks.

3. Southeast Asia

Core: Growth Engine + Hub + Fuel Replacement

  • Accounts for over 60% of global LNG demand growth.
  • India’s demand growing 8%+ annually; China imports over 120 million t/y.
  • Singapore, Malaysia as regional LNG bunkering and transshipment hubs.
  • Replaces coal / heavy oil in power, steel, cement, shipping.
  • Massive investment in terminals, tanks and stations, ideal for small/medium LNG plants.
  • World-leading natural gas reserves (Qatar, Iran, Saudi Arabia).
  • Ultra-large-scale exports; single-train cost as low as ~$2/MMBtu.
  • Emerging as a global LNG bunkering hub (Oman).
  • Dual model: domestic power/industry + export to Europe/Asia.
  • Large plants can integrate CCUS for low-carbon compliance.

5. Africa

Core: Resource Development + Local Power + Export to Europe

  • Huge untapped gas resources (Nigeria, Mozambique, Tanzania).
  • Fast monetization via FLNG / small onshore plants.
  • Solves power shortage for industry and residential use.
  • Becomes a new supply source for Europe to replace Russian gas.
  • Lower investment threshold and shorter payback period.
  • Energy transition bridge: cleaner than coal/oil, more stable than renewables.
  • Flexible trade: seaborne worldwide, no pipeline constraints.
  • Scalable: large plants for cost efficiency; small skids for remote areas.
  • Eco-friendly: low emissions, compatible with CCUS and global carbon policies.
  • Full-chain integration: covers upstream gas fields, midstream liquefaction, downstream regasification and distribution.