Sewage chemical adding reacting system with pH regulating manner

The utility model relates to a sewage chemical adding reacting system with a pH regulating manner. The sewage chemical adding reacting system with the pH regulating manner comprises a sewage pipe, wherein the sewage pipe is provided with a coagulant feeding pipe; the coagulant feeding pipe is arranged in a single-point manner; the coagulant feeding pipe is provided with a coagulant outlet pipe; the coagulant outlet pipe is perpendicular to the coagulant feeding pipe; the coagulant outlet pipe is 5 cm long; a liquid alkali adding area is arranged on one side of the coagulant feeding pipe; the distance between the liquid alkali adding area and the coagulant feeding pipe is 50 cm; five to six liquid alkali feeding pipes are annularly arranged in the liquid alkali adding area; the angle between two adjacent liquid alkali feeding pipes is 60 to 72 degrees; a sampling pipe is arranged on one side of the liquid alkali adding area; the distance between the sampling pipe and the liquid alkali adding area is 3 to 4 m; an end part flange is arranged at each of the two ends of the sewage pipe; the coagulant feeding pipe and the liquid alkali adding area are positioned between the two end part flanges; the sampling pipe is positioned on the outer sides of the end part flanges. According to the sewage chemical adding reacting system with the pH regulating manner, the pH is stabilized in a suitable range during a sewage reaction process by pipeline chemical adding.