Patent ID: 11952291
Assignee: CHONGQING UNIVERSITY OF ARTS AND SCIENCES
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 7:
8. A nickel recycling method of the device according to claim 3, comprising:
S1: wastewater pretreatment
adjusting a pH of nickel-containing wastewater to 3-9;
S2: extraction
introducing the pretreated nickel-containing wastewater and a composite extraction agent into the extraction cavity (13) through the liquid mixing equipment according to a volume ratio of 9-12:1, and turning on the oscillating and floating component (21) and the rotating component (22) to assist in extraction for 10-20 min; opening the electromagnetic valve on the connection pipe, stopping feeding liquid after the extraction cavity (13) and the electro-deposition cavity (14) are filled with the nickel-containing wastewater, and turning off the rotating component (22); and performing extraction for 10-20 min under the assistance of the oscillating and floating component (21);
S3: desorption
opening the electromagnetic valve on the first discharge outlet (130), reading a liquid level of heavy phase liquid on the display instrument, adding, to the electro-deposition cavity (14) through the liquid adding equipment, sulfuric acid that has the same volume as that of an electro-deposition solution and a concentration of 1 mol/L, driving sieve plates (142) to move in a vertical direction through electric drive rods (141), and obtaining enriched liquid after reaction for 15-25 min, where when the sulfuric acid is added, a light phase substance having the same volume as that of the sulfuric acid is discharged from the first discharge outlet (130), and the light phase substance is specifically wastewater without nickel ions; and
S4: electro-deposition
rotating a mounting rod (61) to enable the cathode assembly (31) to move in the vertical direction, driving, by using the drive rod, the second mounting unit and the anode assembly (32) arranged on the second mounting unit to move in the vertical direction to ensure that the cathode assembly (31) and the anode assembly (32) sink into the enriched liquid simultaneously, and performing electro-deposition treatment for 10-20 min on the enriched liquid under conditions of a current of 2-3 A and a voltage of 32-35 V by using the electro-deposition unit (3) in the electro-deposition cavity (14); and discharging the liquid inside the housing body (11) from the second discharge outlet (140).