Cryogenic ASU for Oxy-fuel Combustion

Cryogenic ASU for oxy-fuel combustion is a large-scale air separation equipment based on the principle of cryogenic liquefaction distillation. Compared with traditional air separation equipment, it is specially optimized for the stringent requirements of oxygen purity (usually ≥95%) and flow rate of the oxy-fuel combustion process. This device is the core link in realizing the closed loop of the entire CCUS industry chain and can provide continuous oxygen supply to large industrial facilities such as power plants, cement kilns, and steel plants.

Core Technical Parameters and Performance Indicators

Industrial Applications and Case Studies

Cryogenic ASU for oxy-fuel combustion is mainly used in high-emission industries that require carbon capture:

• Thermal power generation: Used in the boiler modification of coal-fired or gas-fired power plants to achieve oxygen-rich combustion and produce high-concentration CO₂ flue gas for easy storage or utilization.
• Cement manufacturing: Used in cement rotary kilns, it not only facilitates carbon capture, but also improves combustion efficiency and production capacity.
• Steel smelting: Combined with blast furnaces and electric arc furnaces to optimize the steelmaking process while reducing emissions.
• Chemicals and Refining: Provide high-purity oxygen for chemical processes and integrate carbon capture solutions.

Case study: A European pilot power station deployed a cryogenic ASU for oxy-fuel combustion system with technical support from Shenger Gas, with an oxygen production of 200 tons/day. The system successfully provided combustion-supporting oxygen to a 300MWth boiler, enabling the purity of the subsequently captured carbon dioxide to reach over 95%. The carbon capture rate of the entire project exceeded 90%, verifying the industrial feasibility of this technical route.

Summary of product advantages

• Economies of scale: Under large flow demand, the unit oxygen cost advantage is obvious.
• Ultra-high purity: Stable output of more than 95% high-purity oxygen, meeting the strict requirements of oxygen fuel combustion.
• Stable operation: The technology is mature and suitable for long-term continuous operation as the "heart" equipment of the industrial base.
• Multi-product output: It can produce high-purity nitrogen, argon and other by-products at the same time, improving the overall project economy.
• Emission reduction core: It is an indispensable technical equipment to achieve CCUS and "net zero emissions" goals.

Maintenance and precautions

The maintenance of cryogenic air separation equipment is extremely professional and requires focus on:

• Regular overhaul: Usually a comprehensive shutdown overhaul is required every 2-3 years to check compressors, expanders and other high-speed rotating equipment.
• Cold insulation materials: Regularly check the performance of the cold insulation materials of the fractionation tower and pipelines to prevent cooling loss.
• Impurity control: Strictly monitor the air quality of raw materials to prevent carbon dioxide and hydrocarbons from accumulating in the equipment to ensure safety.
• Professional team: A strictly trained operation and maintenance team is required to handle complex working conditions.

Certifications and standards

Shenger Gas's design and manufacturing system follows the highest international standards to ensure the safety and reliability of the equipment:

• ISO 9001:2015 Quality Management System Certification
• ASME BPVC Boiler and Pressure Vessel Code (for pressure vessel design and manufacturing)
• PED EU Pressure Equipment Directive (for exporting EU equipment)
• GB/T China National Standard Series

As a leading gas separation technology solution provider, Shenger Gas Equipment Co., Ltd. has profound technical accumulation and rich project execution experience in the field of cryogenic air separation. We deeply understand the critical role of cryogenic ASU for oxy-fuel combustion in the energy transition. From process simulation, core equipment manufacturing to overall system integration and automation control, we are committed to providing customers with a complete set of air separation units with advanced technology, high return on investment and long-term stability and reliability. Choosing Shenger means you have chosen a trustworthy partner on the road to carbon neutrality. Welcome to inquire and let us tailor the optimal solution for you.

The produce of distillation column

The frame of cold box

the plate rolling in factory

 

 

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