Method and device for recycling acidic etching waste solution through progressive electrolysis

A method for recycling an acidic etching waste solution from PCB production through progressive electrolysis, comprising the following steps:

• step 1, introducing at least one electrolytic cell A, wherein the electrolytic cell A is divided with an electrolytic cell separator into an anode chamber and a cathode chamber;
• during an electrolysis operation, the anode chamber and the cathode chamber of the electrolytic cell A are provided with an electrolytic anode and an electrolytic cathode respectively to allow electrolysis for an anode electrolyte and a cathode electrolyte of the electrolytic cell A respectively;
• and the cathode electrolyte of the electrolytic cell A comprises the acidic etching waste solution;
• step 2, introducing at least one electrolytic cell B to conduct the progressive electrolysis for copper recovery, wherein the electrolytic cell B is divided into an anode chamber and a cathode chamber;
• during an electrolysis operation, the anode chamber and the cathode chamber of the electrolytic cell B are provided with an electrolytic anode and an electrolytic cathode respectively to allow electrolysis for an anode electrolyte and a cathode electrolyte of the electrolytic cell B respectively, such that an electrochemical reaction of reducing a copper ion into metallic copper occurs at the electrolytic cathode of the electrolytic cell B;
• and the cathode electrolyte of the electrolytic cell B comprises a cathode electrolyte undergoing an electrolytic treatment from the electrolytic cell A or a mixed solution of the cathode electrolyte undergoing the electrolytic treatment from the electrolytic cell A with the acidic etching waste solution;
• and
• step 3, when an amount of metallic copper deposited at the electrolytic cathode of the electrolytic cell B due to the electrochemical reaction reaches a preset target electroprecipitated amount, taking the electrolytic cathode of the electrolytic cell B out from the electrolytic cell B.