更高参数二次再热超超临界锅炉关键技术探讨

中国正在开展630 ℃二次再热技术研究。为攻克锅炉研制面临的诸多难点，通过总体方案优化设计、新材料应用、再热汽温调节、壁温偏差控制以及水冷壁设计与制造等关键技术研究，提出针对性解决措施。结果表明：锅炉采用前后墙对冲燃烧、Π型布置及三烟道挡板调温技术，可有效满足630 ℃参数需求。

Discussion on Critical Technologies of Double-Reheat Ultra-supercritical Boiler with Higher Steam Parameters

The research on double-reheat boilers with the reheat steam temperature high up to 630℃ is being carried out in China. To resolve the difficulties in the development of the boilers, a series of key technologies have been studied and corresponding solutions are proposed, such as the boiler general layout optimization, application of new materials, reheat steam temperature adjustment, wall temperature deviation control, upgrade of the water wall design and manufacturing techniques, and so on. The results show that the requirement of 630℃ parameter can be achieved effectively by adopting the technology of front and rear wall burning off combustion, π type layout and temperature control with three flue baffles.