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Coagulating sedimentation system in mine water treatment process

In order to improve the purifying effect of mine water, the invention provides a coagulating sedimentation system in a mine water treatment process. The coagulating sedimentation system comprises mud coagulating sedimentation device tanks, water collecting tanks and labyrinth-type inclined plate tanks, wherein each mud coagulating sedimentation device tank comprises a plurality of mud coagulating sedimentation devices; each mud coagulating sedimentation device comprises a multi-layer bracket arranged in an independent grid and a Y-shaped panel fixed to the multi-layer bracket; the water inlets of the water collecting tanks are communicated with the water outlets of the mud coagulating sedimentation devices; the water outlets of the water collecting tanks are communicated with the inlets of the labyrinth-type inclined plate tanks; and the outlets of the labyrinth-type inclined plate tanks are communicated with a water outlet tank. The mine water enters the water collecting tanks through the mud coagulating sedimentation devices, slowly enters the lower parts of the labyrinth-type inclined plate tanks through the water outlets under the water collecting tanks, flows out upwards, overflows into the water outlet tank, and flows into a middle water tank through a pipeline. By the high-efficiency coagulating method, the water producing efficiency of the whole process is improved, the suspended solids removal rate can reach more than 95%, and the COD (chemical oxygen demand) removal rate reaches 40-99%.