▎ 摘　　要

NOVELTY - Processing waste electrolyte of nickel-cadmium storage battery involves concentrating waste electrolyte in the discarded nickel-cadmium battery in the precipitation tank for precipitation, concentrating precipitation waste electrolyte in the first material tank after primary filtration and secondary filtration in order for storage, separating or adsorbing the heavy metals contained in the waste electrolyte to be treated in the first material tank through heavy metal separation treatment, sampling the waste electrolyte that has undergone heavy metal separation treatment for a specified period of time for testing or on-site testing, when the concentration of heavy metals in the test or detection reaches the standard, it is discharged, and repeating the heavy metal separation treatment for the waste electrolyte. USE - Method for processing waste electrolyte of nickel-cadmium storage battery. ADVANTAGE - The method reduces the content of heavy metal in the waste electrolyte, and ensures the heavy metal of nickel and cadmium contained in the waste electrolyte reach the discharge standard and reach the discharge standard. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a nickel-cadmium battery waste electrolyte treatment device, which comprises: a sedimentation tank, a filter device and a heavy metal separator, where precipitation tank (32) is a tank body with an upper opening, and is used for concentrated precipitation of the waste electrolyte taking out from the discarded cadmium-nickel accumulator, the filtering device includes a coarse filter (33), a precision filter (34) and a first material tank (1), the sedimentation tank is communicated with the coarse filter through a retractable pipe, the coarse filter is communicated with the fine filter and the first material tank in order, the first feed tank is used to store the waste electrolyte to be treated after being filtered by the precision filter, the heavy metal separator includes a casing, a retractable filter element and a second material tank (27), the casing is a sealed container with an upper opening, a sampling port is arranged on the side wall of the casing, and a liquid inlet, a liquid outlet and a collection port are arranged at the bottom end of the casing, on-off valves are respectively arranged on the sampling ports, the retractable filter element is arranged in the housing, the filter medium is arranged on the retractable filter element for separating or adsorbing heavy metals in the waste electrolyte to be treated, the filter medium is nanofiltration membrane, ultrafiltration membrane or graphene oxide colloid, the second feed tank is used for storing cleaning fluid to clean and regenerate the filter medium in the shell, the cleaning solution is an acidic solution with a concentration greater than 0.2 mol/L, the second material tank is provided with a second liquid supply pipe for supplying liquid in the shell, the first material tank is provided with a first liquid supply pipe and a return pipe which are communicated with the liquid inlet of the heavy metal separator, one end of the first liquid supply pipe is communicated with the lower portion of the first material tank, and the other end is communicated with the liquid inlet through a valve and a pump body, one end of the return pipe is communicated with the upper end of the first material tank, and the other end is communicated with the liquid inlet through a valve. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the nickel-cadmium battery waste electrolyte treatment device First material tank (1) Second material tank (27) Precipitation tank (32) Coarse filter (33) Precision filter (34)