再生式空气预热器最突出的问题是腐蚀和泄漏，在性能设计，甚至在暖风器设计时就应予以重视。要达到冷端保护的目的必须处理好冷端平均温度，与其直接有关的是暖风器的性能及布置。此外，空预器漏泄值的评估关系到风机容量的确定和系统的经济性，应引起重视，为此列出了一些方法，以便确定预期漏风量。 The most prominent problems with regenerative air preheaters are corrosion and leakage, which should be emphasized in performance design and even in design of air heaters. In order to achieve the purpose of cold-side protection, the average cold-end temperature must be dealt with directly, and the performance and arrangement of the heater are directly related to it. In addition, the evaluation of air preheater leakage value is related to the determination of the fan capacity and the economy of the system, which deserves attention. Some methods are listed to determine the expected air leakage.