【Ten Years of Rapid Development in Chemical Processing Equipment】China Petrochemical’s first subcritical once-reheat unit was successfully commissioned between 2025 and 2952

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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 ***************** Sinopec’s first subcritical once-reheat power unit was successfully commissioned. On December 28, 2025, the cogeneration project in Xunyang District, Jiujiang City, completed its entire production process. The core equipment of this project – Sinopec’s first subcritical once-reheat power unit – was successfully brought online, and the electric and thermal energy systems were connected to the grid for the first time. This marks the completion of the project, laying a solid foundation for the advancement of Sinopec Jiujiang Branch’s 1.5 million tons per year aromatic compounds and refining expansion project. It is reported that this project is a key initiative for Jiujiang City and Jiujiang Petrochemical. It also serves as a foundation for the company to establish a new integrated development model for oil refining and aromatics production, and to move toward a full industrial chain that includes oil refining, aromatics, PTA, PET, and end products. This project will provide sufficient energy for Jiujiang Petrochemical’s 1.5 million tons per year aromatics production and related oil refining upgrades. The project commenced on October 16, 2023. The project team overcame challenges such as tight deadlines, heavy workload, limited construction space, and the need to carry out operations simultaneously in maintenance, production, and construction areas, and successfully completed the construction of 1 subcritical circulating fluidized bed boiler with a capacity of 410 tons per hour, 1 50-megawatt turbo-generator set with high back pressure, as well as auxiliary systems for desalinated water and fuel preparation and transportation. Facing new equipment and processes such as subcritical circulating fluidized bed boilers, once-reheat systems, and deep backpressure unit plants, the staff of Jiujiang Petrochemical’s Power Operation Department got involved from the very beginning of the project construction. They formed special task teams, learned about these new technologies while identifying issues such as design flaws and construction quality problems, and carried out preliminary checks and adjustments to ensure everything was ready for commissioning. During the commissioning phase, officers and employees worked day and night with determination. At 23:06 on December 27, 2025, the newly installed high-backpressure steam turbine unit at Jiujiang Petrochemical was successfully connected to the grid for the first time, starting to generate electricity ； At 19:30 on December 28, the steam systems at various pressures, including 3.5 MPa, of the newly built subcritical boiler were connected to the grid one after another, and the regenerative heating system was brought into full operation, marking the successful first commissioning of the project. This project features advanced technology and low energy consumption; it enables ultra-clean emissions. Its key performance indicators, such as overall thermal efficiency, coal consumption per unit of electricity generated, and coal consumption for heat production, are all superior to the **standards, achieving a domestically leading Class I energy efficiency level. The completion and commissioning of this project not only provides sufficient, stable, and clean energy for Jiujiang Petrochemical’s 1.5 million tons per year aromatic compounds and refining expansion project, but it also marks a significant step forward for the company in terms of energy conservation, consumption reduction, and sustainable development. It represents the first step taken by petrochemical companies to improve the efficiency of their thermal power units. Once the new facility is put into operation, it will significantly improve the overall efficiency of energy utilization across the plant, enhance the capacity of the utility systems to provide reliable supply, and offer essential support for the safe and stable production of the enterprise as well as its long-term transformation and development.