High-COD (Chemical Oxygen Demand) waste liquid reduction device with automatic adding structure

The utility model discloses a high-COD (Chemical Oxygen Demand) waste liquid reduction device with an automatic adding structure, and relates to the technical field of waste liquid reduction. Comprising a reduction box and a feeding unit arranged at the upper end of the reduction box, a liquid inlet pipe is arranged on the side wall of an inner cavity of the reduction box, connecting rod liquid level devices are arranged on the two sides of the liquid inlet pipe, an expansion part is arranged at the lower end of the liquid inlet pipe, a movably-installed floating ball is arranged on the inner side of the expansion part, and a connecting line is arranged at the upper end of the floating ball; the device solves the technical problems that the amount of added waste liquid is inconvenient to control, and the reaction is easily influenced by excessive liquid adding, the connecting rod liquid level device and the floating ball are arranged in the reduction box, if excessive liquid is added, the floating ball is jac