Metal ion recovery device, metal recovery system, and metal ion recovery method

A metal ion recovery device comprising:

• a raw solution tank that is configured to store a metal ion containing raw solution including metal ions;
• a recovery liquid tank that is configured to store a metal ion recovery liquid including metal ions recovered from the metal ion containing raw solution;
• a metal ion selective permeable membrane that is a sintered body configured to be in contact with the metal ion containing raw solution on one side, to be in contact with the metal ion recovery liquid on another side, and to selectively transmit the metal ions from the metal ion containing raw solution to the metal ion recovery liquid;
• an anode that is positioned to be in contact with the metal ion containing raw solution;
• a cathode that is positioned to be in contact with the metal ion recovery liquid;
• a first porous current collector that is formed of a conductive material and is in electrical connection with the metal ion selective permeable membrane and one of the anode and the cathode;
• a first spacer that is configured to maintain a first gap between the metal ion selective permeable membrane and the one of the anode and the cathode, the first porous current collector being housed in the first gap;
• and
• a second spacer that is configured to maintain a second gap between the metal ion selective permeable membrane and the other one of the anode and the cathode,
• wherein the first spacer is a frame shape,
• and the second spacer is a frame shape,
• wherein at least one of the first spacer and the second spacer comprises:
• an opening;
• a recess portion surrounding the opening;
• and
• a peripheral non-recessed portion,
• wherein the metal ion selective permeable membrane is housed in the recess portion so as to be fitted therein, thereby preventing positional deviation of the metal ion selective permeable membrane;
• and
• a load is uniformly applied to a laminate in which the anode, the first spacer, the metal ion selective permeable membrane, the second spacer, and the cathode are laminated in this order in a direction along a lamination direction by the first spacer and the second spacer, the load is applied to the non-recessed portion of the at least one of the first spacer and the second spacer, thereby reducing the load applied directly to the metal ion selective permeable membrane.