Afterheat recovery device applied to dry desulfurization technology

The invention discloses an afterheat recovery device applied to a dry desulfurization technology, belonging to the technical field of afterheat recovery. The provided afterheat recovery device applied to the dry desulfurization technology can recover smoke afterheat in a boiler efficiently to preheat a desulfurizing agent, so that the denitration efficiency in the boiler is increased, the boiler energy consumption is reduced and the boiler efficiency is improved. The afterheat recovery device applied to the dry desulfurization technology comprises a boiler, a cyclone separator, rear smoke channel, an air pre-heater, a dust remover and a chimney, wherein the boiler, the cyclone separator, the rear smoke channel, the air pre-heater, the dust remover and the chimney are connected in sequence; a desulfurizing agent pre-heater A is also arranged between the air pre-heater and the dust remover; the desulfurizing agent pre-heater A is connected with the boiler; a desulfurizing agent pre-heater B is also arranged between the desulfurizing agent pre-heater A and the boiler; the desulfurizing agent pre-heater B is also connected with the rear smoke channel. The afterheat recovery device is mainly applied to the aspect of afterheat recovery.