【Ten Years of Rapid Development in Chemical Engineering Equipment】Significant progress has been made between 2015 and 2025 on the first pilot-scale megawatt-class pressurized oxygen-enriched combustion system, with multiple records set

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Let’s give praise and support to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Progress in Chemical Engineering Equipment】Regular updates and summaries are available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html *****************According to the Institute of Engineering Thermophysics, the staged pressurized oxygen-enriched combustion technology, developed independently by this institute under the Chinese Academy of Sciences, has recently completed key tests on a pilot scale. It was able to operate continuously and stably at a pressure of 1.0 MPa for 72 hours, with the CO₂ concentration in the dry flue gas exceeding 93%. In terms of key parameters such as the scale of the testing setup, operating pressure, flue gas CO₂ concentration, and continuous operation time, this achievement represents the highest level reported so far both domestically and internationally. Xi’an Thermal Engineering Research Institute Co., Ltd. served as a third-party entity to witness the process on-site. Coal-fired power generation is the largest source of carbon emissions in China. Pressurized oxygen-enriched combustion technology can reduce the energy consumption required for carbon capture during combustion and improve the economic efficiency of oxygen-enriched combustion systems; it is considered one of the most promising technologies for large-scale carbon emission reduction. Pressurized oxygen-enriched combustion technology faces significant technical challenges related to flow, combustion, and heat transfer. Relevant research both domestically and internationally is still mainly at the pilot scale, while pilot-scale studies on core issues such as heat transfer and the layout of heated surfaces are virtually non-existent; there is an urgent need to carry out technical research at the pilot scale. With the support of the **Key R&D Program “Key Technologies and Equipment for Pressurized Oxygenenriched Clean Combustion and Efficient Heat Transfer”**, the circulating fluid bed laboratory team at the research institute proposed and developed the \"staged pressurized oxygenenriched combustion technology\", and designed and constructed the world’s first megawatt-class pilot plant for staged pressurized oxygenenriched combustion. The R&D team addressed issues such as excessively high heat flux density in the furnace under pressurized conditions and instability in the dense phase region under high-pressure conditions from multiple perspectives, including system thermal load distribution, efficient heat exchange in the furnace, and stable fluidization in the dense phase region. This enabled the verification of this technology on a pilot-scale basis. The research results provide data support for the subsequent design and system integration of 350MW supercritical staged pressurized oxygen-enriched combustion boilers, and are expected to promote the development of pressurized oxygen-enriched combustion technology in terms of safety, cost-effectiveness, and larger scale.