Preheating primary air combined system of garbage incinerator

The utility model relates to the technical field of garbage incineration boilers, in particular to a primary air preheating combined system of a garbage incinerator, which can ensure that the temperature of primary air meets the requirement and improve the operation stability of the boiler and comprises a steam air preheater, and primary air is introduced into an inlet of the steam air preheater.An outlet of the steam air preheater is connected with a first air inlet of the direct air preheater and an inlet of the direct air preheater draught fan, an outlet of the direct air preheater draughtfan is connected with a second air inlet of the direct air preheater, and a combustor is installed at an air inlet of the direct air preheater. Natural gas or diesel oil is introduced into the combustor, and an air outlet of the direct type air preheater serves as an air outlet of primary air. 本实用新型涉及垃圾焚烧锅炉技术领域，具体为一种垃圾焚烧炉预热一次风组合系统，其能够确保一次风温度满足要求，提高锅炉运行稳定性，其包括蒸汽空气预热器，所述蒸汽空气预热器的入口处通入一次风，其特征在于，所述蒸汽空气预热器的出口连接直接式空气预热器的第一入风口和直接