【Ten Years of Rapid Development in Chemical Engineering Equipment】2228–2025: The World’s First 700-Megawatt High-Efficiency Ultra-Supercritical Circulating Fluidized Bed Boiler
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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 ***************** Recently, Dongfang Boiler received good news: the world’s first 700-megawatt high-efficiency ultra-supercritical circulating fluidized bed boiler, developed and manufactured by this company, has completed all testing procedures at the Yunnan Yuneng Honghe Power Plant. This marks the beginning of the countdown to the operation of this generator set, which boasts the largest capacity and the most advanced technical specifications in the world. It is stated that boiler purging is an important step prior to the full startup of the power unit, and the quality of this purging process has a decisive impact on the safe, stable, and sustained operation of the unit. During the blowing process, key parameters such as the pressure and temperature of the main steam and reheat steam were precisely controlled; the boiler itself and all metal pipes expanded normally, with no occurrences of overpressure or overheating in the walls of the heating surfaces. All indicators met the acceptance standards, and the blowing process was completed successfully. It is worth noting that, as one of the key projects under Yunnan Province’s 14th Five-Year Plan, this project utilizes the world’s most advanced high-efficiency ultra-supercritical circulating fluidized bed power generation technology. It represents the largest single-unit capacity of its kind in the world, features the most advanced power generation technology, the highest efficiency, and the best overall environmental and energy-saving benefits among circulating fluidized bed units. Upon completion of the project, the total installed capacity of the power plant – consisting of one large unit and two smaller units – will reach 1,300 megawatts. This will enable it to generate over 7 billion kilowatt-hours of electricity per year, making it the largest stable power supply source in southern Yunnan. It will help meet the growing energy demands during Yunnan’s 14th Five-Year Plan period as well as in the medium to long term, accelerate the development of a modern energy system, and make further positive contributions to ensuring energy security in Yunnan Province. “We have assembled an experienced project team that fully leverages the systematic management strengths in production and manufacturing, project delivery, and engineering services. ”A responsible official from Dongfang Boiler said that to ensure the smooth progress of this project, the company attaches great importance to it, carrying out coordinated management across the entire process – from research and development and design, through project execution and compliance, to installation and commissioning services. Strict scheduling is followed to ensure that on-site progress advances according to the planned steps, thereby achieving the set milestones successfully.
On January 13, the **Energy Administration issued Announcement No. 1 for 2025; the “700MW ultra-supercritical circulating fluidized bed flexible and intelligent power generation unit,” proposed by Yunnan Energy Investment Group as part of the expansion project at the Honghe Power Plant, was successfully selected** as part of the fourth batch of major technical equipment of its kind in the energy sector. This unit fills the gap for the first set of such major equipment in the province, marking an important step forward for our province in the field of energy technology innovation.
On January 16, the hydrostatic test for the boiler of the super-supercritical circulating fluidized bed unit in the Honghe Power Plant expansion project (1×700MW) was successfully completed. The units in the expansion project of Yunnan Nengtou Honghe Power Plant utilize the state-of-the-art ultra-supercritical circulating fluidized bed (CFB) power generation technology available in China. The rated steam pressure is 29.3 MPa, the temperature is 605°C, and the thermal efficiency of the units is 46.34%. The coal consumption per unit of electricity generated is 283.6 grams per kilowatt-hour, while the minimum load is 30% of the rated load. All these key parameters exceed the requirements set by the latest energy efficiency regulations; these units represent the largest, most efficient, lowest-energy-consuming, and highest-performing ultra-supercritical circulating fluidized bed units in the world. At the same time, the project is equipped with desulfurization and denitration systems; the emission levels of dust, sulfur dioxide, and nitrogen oxides are all below the **ultra-low emission standards. It represents a highly efficient and environmentally friendly power generation unit in China, capable of saving approximately 175,000 tons of standard coal per year and reducing carbon emissions by around 500,000 tons. The boiler hydrostatic test is a highly critical milestone in the construction of thermal power plant units. It represents a significant test of the numerous pressure-welded joints in the boiler, and it serves as an important means to verify the sealing quality and integrity of the boiler’s pressure-bearing components. The success of this hydrostatic test has a positive impact on the progress and quality control of the Honghe Power Plant expansion project, creating favorable conditions for the timely carrying out of subsequent important tasks such as boiler drying, pickling, and tube blowing.
On November 19, 2024, a reporter from Sichuan Online learned from Dongfang Electric Group Dongfang Boiler Co., Ltd. (hereinafter referred to as “Dongfang Boiler”) that the hydrostatic test of the Yunneng Honghe 700-megawatt high-efficiency ultra-supercritical circulating fluidized bed boiler, designed and manufactured by Dongfang Boiler, was successfully completed in one attempt. This boiler is the world’s first 700-megawatt high-efficiency ultra-supercritical circulating fluidized bed boiler designed for burning lignite. This boiler is part of the 1×700 MW expansion project for Yunnan Nengtou Honghe Power Plant; the units involved in this project are the cycle fluidized bed units with the largest single-unit capacity, the highest efficiency, and the best coal consumption for power generation at present. It is reported that the success of the hydrostatic test indicates that the sealing and integrity of the boiler’s pressure-bearing components meet the required standards, signaling that the main components of the boiler have been installed. Next, tasks such as boiler drying, pickling, tube blowing, and insulation will be carried out. After 168 hours of trial operation, it can be put into formal use. In the field of coal-fired power generation, ultra-supercritical refers to the state of water. The higher the parameters such as steam pressure and temperature, the greater the energy efficiency. When the steam temperature inside the furnace is not less than 580°C and the steam pressure is not less than 25 MPa, it is referred to as ultra-supercritical. The ultra-supercritical circulating fluidized bed power generation technology is a new type of boiler that results from the combination of ultra-supercritical technology and circulating fluidized bed technology.