en.Wedoany.com Reported - At 10:28 AM on June 28, with the precise lifting and placement of the upper half of the low-pressure outer casing, the steam turbine cover lifting for Unit 7 of the Huainan Luohe Power Plant Phase IV 2×1000MW Ultra-Supercritical Double Reheat Coal Power Project, constructed by China Energy Engineering Group Construction Co., Ltd., was successfully completed. The achievement of this important milestone marks the full entry of the turbine body installation work into the final sprint phase, laying a solid foundation for subsequent subsystem commissioning and the unit's scheduled power generation.
1. Precise Organization Ensures One-Time Success of Cover Lifting
Steam turbine cover lifting is one of the key processes in thermal power construction with the highest technical requirements and strictest quality standards, often hailed as the coronation ceremony of turbine installation. It directly impacts the safe and stable operation of the unit after commissioning. To ensure a one-time success, the project team adhered to the principles of planning first, scheme guidance, and strict process control. A specialized construction plan was formulated in advance, clarifying responsibilities and timelines for each step, with comprehensive arrangements made for the entire cover lifting process.
From June 15 to 18, the project team proactively coordinated with the owner and quality supervision authorities, successfully completing the quality supervision inspection before cover lifting. In response to the outstanding items and rectification requirements identified during the inspection, the project team promptly developed a targeted rectification plan, scheduling tasks in reverse order and assigning responsibilities to individuals. They coordinated the completion of outstanding work, including areas from the bottom of the casing to the first auxiliary support hanger, and fully completed all rectifications and defect elimination by June 25, passing the re-inspection and clearing obstacles for the formal cover lifting.
At 8:00 AM on June 28, the project team organized a safety and technical briefing meeting for the steam turbine cover lifting on the 17-meter platform of the turbine hall. The meeting provided comprehensive briefings on the cover lifting workflow, safety risk points, and quality control essentials, ensuring that every participant understood the operational requirements and mastered the key techniques. From scheme approval to technical briefing, and from personnel training to tool inspection, every step was meticulously prepared to ensure foolproof execution.
During the cover lifting process, construction personnel strictly followed the operation instructions, sequentially completing over ten procedures, including cleaning the low-pressure inner casing and internal components, lifting and placing the lower half of the low-pressure inner casing, lifting and placing the lower half of the stationary blade retaining rings at the regulating end and generator end, lifting and placing the lower halves of the fifth and sixth stage diaphragms, lifting and placing the low-pressure rotor and positioning the K value, lifting and placing the upper halves of the stationary blade retaining rings and diaphragms, lifting and placing the upper half of the low-pressure inner casing, hot tightening of the horizontal joint bolts, and lifting and placing the upper half of the low-pressure outer casing. The entire process was safe and controllable, with quality meeting standards. All technical data complied with specifications and manufacturer requirements, achieving a one-time success in cover lifting.
2. Craftsmanship Excellence Sets Benchmark for Coal Power Efficiency
The steam turbine of Unit 7, which underwent cover lifting, is an ultra-supercritical, double intermediate reheat, single-shaft, five-casing, four-exhaust, eleven-stage regenerative, condensing steam turbine. It consists of five modules: an ultra-high-pressure casing, a high-pressure casing, an intermediate-pressure casing, and two low-pressure casings, serving as the core equipment of the entire unit. This unit employs the world-leading ultra-supercritical double reheat technology, a core process hailed as the ceiling of coal power efficiency, pushing energy utilization efficiency to new heights.
The main steam pressure of the unit exceeds 31MPa, with temperatures surpassing 600°C. By incorporating an ultra-high-pressure casing to achieve a double steam reheat cycle, the coal consumption per kilowatt-hour is reduced by approximately 15 grams compared to traditional single reheat units. The designed standard coal consumption for power supply is as low as 256 g/kWh, outperforming the 270 g/kWh standard stipulated in the new-generation coal power upgrade action plan and approaching the current highest domestic level. The application of over ten innovative technologies, including variable-frequency regulation of induced draft fan blades and integrated high-efficiency desulfurization and dust removal, controls the emission concentrations of particulate matter, sulfur dioxide, and nitrogen oxides to within 0.3 mg/m³, 1.9 mg/m³, and 13.2 mg/m³, respectively, achieving near-zero emission levels.
The Luohe Power Plant Phase IV project is a key power source project in Anhui Province's 14th Five-Year Plan and the first million-kilowatt coal power project under the controlling stake of Huaihe Energy Holding Group. With a dynamic total investment of 7.57 billion yuan, it is constructed on the original site of the decommissioned Phase I units, requiring no additional land acquisition. The project is scheduled to commission two units successively by the end of 2026 and early 2027. Upon completion, the total installed capacity of the power plant will leap from 1.9 million kW to 3.9 million kW, with an estimated annual power generation of 18 billion kWh, transmitting over 10 billion kWh to Anhui Province, becoming a crucial power support point for the East China Power Grid.
3. Legacy Continues: Power Construction Iron Army Embarks on New Journey
The Luohe Power Plant was first constructed in 1982 as a key national project under the Sixth Five-Year Plan. Over forty years ago, builders from China Energy Engineering Group Construction Co., Ltd. undertook the construction of the Luohe Phase I, which featured two 300MW units—the largest single-unit capacity in Anhui Province at the time. This effort forged the corporate spirit of unity and struggle, self-discipline and dedication, courage to compete, and the resolve to be an iron army, establishing the "four no's" work ethic: no regard for time, no conditions, no compensation, and no compromises. They achieved the remarkable feat of commissioning Unit 1 on schedule and Unit 2 168 days ahead of the national assessment timeline, earning widespread acclaim for the power construction iron army.
In 1999 and 2007, the company successively completed the Luohe Phase II and Phase III projects, continuously evolving and elevating the "Four Essences" philosophy and "Ultimate Excellence" culture. In 2024, the company won the bid for the Luohe Phase IV project, returning to its roots, seeking cultural heritage, and embarking on a new journey. From 300MW to 1,000MW, from Phase I to Phase IV, what has changed is the unit capacity and technical level, but what remains unchanged is the power construction personnel's relentless pursuit of excellence and the iron army's indomitable spirit of daring to win.
China Energy Engineering Group Construction Co., Ltd. is responsible for the construction and installation of Unit 7, along with some common systems, the chimney, and the cooling tower. The project contract period is 24 months. Since construction began on December 25, 2024, all project builders have been anchored to the goal of commissioning and generating power by the end of October 2026, two months ahead of the contract schedule, driving the project forward with a work style characterized by thoroughness, rigor, and efficiency.
4. Targeting Goals: Full Sprint Towards Commissioning Milestone
The successful completion of the steam turbine cover lifting is an important milestone in project construction and a new starting point. In the next phase, the project team will continue to focus on the commissioning target, coordinating the final stages of installation and the initiation of commissioning work, strictly controlling safety and quality, and striving to create a benchmark project for million-kilowatt units.
All project builders will inherit and promote the Luohe spirit, with greater enthusiasm, a more pragmatic work style, and more effective measures, advancing the project construction with high standards, high quality, and high efficiency. They will ensure the units are commissioned and generate power on schedule, contributing to the optimization of Anhui Province's energy structure and economic and social development, and fulfilling the mission of building a world-class enterprise through concrete actions. (China Energy Engineering Group Construction Co., Ltd., Yan Kailin)
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