en.Wedoany.com Reported - Recently, the world's first coupled flue gas molten salt heat storage boiler, applied in Unit 4 of the Langfang Thermal Power Phase II project of China Energy, achieved a successful ignition, with stable operating parameters meeting standards and normal system linkage. This marks phased progress in the "Research and Engineering Demonstration Project of Key Technologies for 350MW High-Efficiency and Flexible Coal-Fired Power Generation Units," laying the foundation for the unit's overall startup and commercial operation.
The boiler ignited this time is the world's first 350MW supercritical combined heat and power boiler coupled with a flue gas molten salt heat storage system, and also the first 350MW tower-type boiler in China. This equipment is among the third batch of national first (set) major technical equipment in the energy sector and the core device of the national energy reform pilot demonstration project. The unit's minimum stable power generation load is reduced to 15% of the rated condition, the hot start time is less than 2 hours, the increase in coal consumption for power supply under 30% rated load is no more than 15%, and ultra-clean emissions are maintained under all operating conditions. All indicators have reached industry-leading levels, providing a new technical pathway for the efficient and flexible transformation of coal-fired power.
Before ignition, the project team, with the goal of "zero defects, one-time success," developed an ignition plan and emergency response procedures, completed the full system joint commissioning and testing of the boiler body, air and flue gas systems, and safety protections, and conducted comprehensive safety technical briefings and hazard identification and rectification for all personnel. The team precisely controlled key parameters such as the air-coal-water ratio and the heating and pressurization rate, and monitored core parameters like furnace pressure, flue gas temperature, and wall temperature in real time throughout the process, ensuring the safety of the ignition operation. With the stable ignition of the torch, the boiler exhibited excellent combustion conditions and normal heat transfer, achieving a complete one-time successful ignition, verifying the safety, reliability, and advanced nature of this world-first technical route. The plant will take this successful ignition as a starting point to advance subsequent work such as boiler steam blowing, overall startup, and 168-hour trial operation, promoting the project's early commissioning and contributing to the construction of a new power system, clean and efficient utilization of coal, and regional energy security.
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