Chemical sewage primary filtering device

The utility model discloses a primary filter device for chemical sewage, which relates to the field of sewage treatment and comprises a conical filter tank, a left belt roller, a right belt roller, a bottom belt roller and a gravel conveying belt, the left belt roller is movably mounted on one side of the conical filter tank through a rotating shaft, and the right belt roller is movably mounted on the other side of the conical filter tank; the right belt rotating roller is movably installed on the other side of the conical filter tank through a rotating shaft, the bottom belt rotating roller is movably installed at the bottom end of the conical filter tank through a rotating shaft, belt penetrating windows are formed in the left side and the right side of the conical filter tank in a penetrating mode, and the gravel conveying belt penetrates through the belt penetrating windows; according to the scheme, chemical sewage containing silt is precipitated and filtered through the conical filter tank, a gravel conv