The present invention relates to an improvement in the water circulation performance and improvement of maintenance convenience of a batch recovery boiler for introducing hot air generated from a sinter plant cooler into a water tube boiler to produce steam and hot water and to protect the tubes of low pressure and high pressure absorbers Which is divided into an upper body, an intermediate body, and a lower body, and is assembled by bolting the flanges attached to the respective divided parts of the upper body, the intermediate body, and the lower body to form an integrated boiler And an upper body, an intermediate body, an intermediate body and a lower body are connected to each other by a tube to recover heat from the hot air passing through the cooler to produce steam and hot water, And the evaporator is fitted with a sleeve in the tube hole of the casing, Allows for the thermal expansion does not penetrate sikidoe welding, the header of the short pipe cutters, high pressure and low pressure section tangi is characterized by a heat recovery boiler which prevent the flow accelerated corrosion low alloy zero.
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