Clarification method of flue gas saturated with mixed liquid

The invention discloses a flue gas saturation mixed juice settling method, which is that flue gas is adopted to carry out the saturation pretreatment of mixed juice on the basis of the phosphate sulfite method before the sulfur fumigation of the mixed juice is carried out; then the mixed juice is treated by the floating treatment to remove part of impurities and reducing sugar to enable the mixed juice to reach an ideal effect, at the same time, the utilization of the flue gas can reduce the using amount of phosphate and sulfur and the production amount of filter mud is reduced to achieve the purposes of improving the sugar boiling recovery, lowering the intensity of sulfitation and the using amount of the phosphate and improving the product quality.