Lime slurry preparation device with two preparation modes

The utility model relates to an environmental protection device. The utility model aims to provide a lime slurry preparation device with two preparation modes, and the device not only can realize single-tank preparation of lime slurry, but also can realize continuous overflow preparation of the lime slurry so as to ensure continuous and stable operation of a deacidification system and meet emission requirements. According to the technical scheme, the lime slurry preparation device with two preparation modes comprises a preparation tank of which the top end is communicated with a water source and the bottom end is provided with a discharge joint, a stirrer arranged in the preparation tank, and a variable-frequency screw conveyor for conveying lime powder into the preparation tank, the device is characterized in that the device is also provided with a lime slurry storage tank; the preparation tank is provided with a weighing instrument, an overflow structure is arranged in the preparation tank, and the overflow