The sulfuric acid dregs discharging humidifier is a necessary device in the dregs discharging device, which belongs to the technical field of chemical equipment dregs discharging. The key point is that the humidifier is a spiral body and is integrated with the dregs cooling drum, operating with the drum, not occupying space height, not requiring separate power, and having a good humidification effect. This practical novel invention has a reasonable and simple structure, convenient operation and maintenance, long service life, low humidification cost, and good application promotion value.