Device and method for reducing solid content of slurry of low-temperature chlorination leaching system

The invention is suitable for the technical field of titanium dioxide chloride, and provides a device and a method for reducing the solid content of slurry of a low-temperature chlorination leaching system. Comprising a chlorination furnace; a low-temperature chlorination leaching tower; the spraying part is arranged at a flue gas outlet in the chlorination furnace; a spray tank; the collecting device is used for collecting spray water discharged from the low-temperature chlorination leaching tower; the organic reagent spraying device is arranged in the low-temperature chlorination leaching tower; the spraying tank provides spraying water for the heat exchanger through the conveying pump; the output end of the heat exchanger is communicated with the input end of the spraying part through a first conveying pipeline; a solid-liquid separator is further arranged between the heat exchanger and the conveying pump, and the solid-liquid separator is used for carrying out solid-liquid separation on the spraying water