Stirring and mixing device for automatic sewage treatment

The invention discloses a stirring and mixing device for automatic sewage treatment, and belongs to the field of sewage treatment.The stirring and mixing device comprises a mixing box, the bottom of the side face of the mixing box is fixedly connected with a supporting base, the outer portion of the top end of the mixing box is movably sleeved with a top cover, and the top of the top cover is fixedly sleeved with a sewage inlet pipe, an acid inlet pipe and an alkali inlet pipe from left to right; a sewage inlet valve, an acid control valve and an alkali control valve are fixedly mounted outside the sewage inlet pipe, the acid inlet pipe and the alkali inlet pipe respectively; a sewage outlet pipe is fixedly connected to the bottom of the mixing box; according to the stirring and mixing device for automatic sewage treatment, by arranging a stirring shaft, a stirring motor and a stirring spring, in the process of adjusting the PH value of sewage, liquid at different depth layers in the mixing box can be conveni