Cold Box

It is the core equipment for LNG liquefaction. Adopting aluminium plate-fin multi-stream heat exchangers, it utilises cooling capacity provided by MRC mixed refrigerant to cool purified natural gas down to -162 °C for liquefaction, acting as the heart of the entire liquefaction unit.

Working Principle

Purified natural gas exchanges heat counter-currently with multiple refrigerant streams inside the cold box, achieving gradual cooling. Gas-liquid separation takes place after throttling to produce liquid LNG.

Core Advantages

✅ Brazed aluminium plate-fin construction with high heat transfer efficiency and compact layout 

✅ Multi-stream heat transfer, compatible with MRC mixed refrigerant cycle 

✅ Vacuum insulation structure for low cold loss 

✅ Prefabricated at factory and supplied in modular packages 

✅ Suitable for skid-mounted LNG liquefaction units

Technical Parameters

Operating Temperature: -162 °C Material: Aluminium alloy (BAHX plate-fin core)

Applications

Skid-mounted LNG liquefaction, small-scale natural gas liquefaction plants