Coarse treatment system suitable for chemical production waste liquid treatment

The utility model discloses a coarse treatment system suitable for chemical production waste liquid treatment. The coarse treatment system comprises a primary filtering tank and a secondary filtering tank, the primary filtering tank and the secondary filtering tank are vertical containers; a primary filter screen is arranged in the primary filter tank; a secondary filter screen is arranged in the secondary filter tank; the primary filtering tank receives waste liquid at the process upstream and performs primary filtering through the primary filtering net, and the secondary filtering tank receives waste liquid of the primary filtering tank at the process upstream and performs secondary filtering through the secondary filtering net; meshes of the first-stage filter screen are larger than those of the second-stage filter screen. The coarse treatment system is provided with the first-stage filtering tank and the second-stage filtering tank which are connected in series, second-stage filtering treatment is formed