cryogenic compressor for low-temperature boil-off gas

Cryogenic compressors play a vital role in deep-freezing processes, ensuring stable flow and pressure of gases at extremely low temperatures. They are indispensable in the processing and recovery of liquefied natural gas (LNG), liquid hydrogen (LH₂), liquid helium (LHe), cryogenic ethylene, and other specialty gases.

Main Features of Cryogenic Compressors

1. Wide temperature adaptability: Operate reliably in environments from -160°C to -30°C, accommodating various deep-freeze industrial processes.
2. High-efficiency design: Constructed with specialized cryogenic materials—such as stainless steel, aluminum alloys, or advanced cryogenic alloys—to ensure superior strength and durability even at ultra-low temperatures.
3. Reliable sealing: Employ advanced cryogenic sealing technologies to prevent gas leakage and enhance overall system safety.

Working Principle of Cryogenic Compressors

1. Cryogenic gas intake: At ultra-low temperatures (as low as -160°C), gases enter the compressor from storage tanks, pipelines, or process systems.
2. Gas pressurization: Reciprocating pistons, screw rotors, or centrifugal impellers compress the gas, increasing its pressure for downstream use.
3. Thermal management: Compression generates heat, so robust cooling systems (e.g., deep coolants, heat exchangers) maintain gas temperature within safe, efficient operating limits.
4. Discharge transport: The compressed cryogenic gas is delivered to downstream applications such as liquefaction plants, recovery units, or high-pressure storage tanks.

Application Areas of Cryogenic Compressors

1. LNG (Liquefied Natural Gas) Industry: Recovery, pressurization, and delivery of boil-off gas (BOG) to optimize energy usage and minimize waste.
2. Deep-cooled gas recovery: Handling and recovery of cryogenic gases like liquid hydrogen (LH₂) and liquid helium (LHe) to improve storage efficiency and reduce losses.
3. Petrochemical and chemical industry: Stable transport and separation of cryogenic gases, especially in ethylene cracking and gas separation processes.
4. Aerospace and scientific research: Used in superconducting magnet cooling, cryogenic laboratories, and aerospace propulsion systems for reliable pressurized gas transport.
5. New energy and hydrogen energy fields: Critical for hydrogen fuel cells, liquid hydrogen storage, and transportation systems to enhance hydrogen utilization and efficiency.