锅炉炉膛防内爆设计压力的选择与引风机的压头有一定关系,目前,国内外的相关规程规定存在着一定的矛盾。近年来,随着烟气系统总阻力的增加,各工程在锅炉炉膛防内爆设计压力的选取上不统一,且有不断升高的趋势。文章对锅炉炉膛负压承压能力的选取进行了研究,特别是高压头引风机,并提出了选取原则和相应的措施。 The choice of design pressure of boiler internal combustion explosion prevention has a certain relation with the pressure head of induced draft fan. At present, there are some contradictions in the relevant regulations at home and abroad. In recent years, with the increase of the total resistance of the flue gas system, the design pressure of each project in the boiler’s internal combustion explosion prevention design is not uniform, and there is an increasing trend. In this paper, the selection of the pressure-bearing capacity of the boiler hearth is studied, especially the high-pressure head-induced draft fan, and the selection principle and the corresponding measures are put forward.