Enclosed type electrolytic tank and electrolytic system

Abstract

The invention discloses a sealed electrolysis bath and an electrolytic system, the electrolysis bath comprises two end plates, an anode component, a cathode component, sealing components and a compacting device, wherein liquid flowing ports are evenly arranged on the two end plates, liquid flowing through-holes are correspondingly arranged on the anode component and the cathode component, the anode component and the cathode component are separately arranged between the two end plates, a polar chamber is formed between the anode component and the cathode component, the sealing components are evenly arranged on the contact position of the anode component, the cathode component and the end plates, and the anode component, the cathode component and the end plates form a sealed structure after being compacted through the compacting device. The electrolysis bath has simple structure and can increase the circulation speed of electrolyte, the overpotential is effectively lowered, the current density of an anode and a cathode is increased when in electrolysis, the productivity of unit electrolysis bath is increased, and the electrolysis bath can be widely applied in electrowinning various metal and in electrowinning metallic solution with low concentration. The sealed structure avoids the influence of gas which is discharged in the electrolysis process to environment in a workshop.

Description

technical field [0001] The invention relates to an electrolytic cell technology, in particular to a closed electrolytic cell and an electrolytic system suitable for metal electrowinning. Background technique [0002] In the existing production technology, the general electrolytic cell is an open electrolytic cell. Due to the slow flow rate of the electrolyte, it is difficult for the liquid to ensure a uniform flow rate, and uneven flow and dead ends are prone to occur, which not only makes the current distribution on the electrodes uneven. , resulting in a decrease in the electrolytic current density, and due to the slow flow rate, the laminar flow layer on the electrode surface is wider, so that the concentration of the electrolyte on the electrode plate surface becomes lower, resulting in concentration polarization, the cell voltage rises, and the secondary The opportunity for the reaction to occur, thus limiting the increase of the current density during electrolysis; in ...

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Problems solved by technology

[0002] In the existing production technology, the general-purpose electrolytic cell is an open electrolytic cell. Due to the slow flow rate of the electrolyte, it is difficult to ensure a uniform flow rate of the liquid, and it is prone to uneven flow and dead ends, which not only makes the current distribution on the electrodes uneven , causing the electrolytic current density to drop, and because the flow rate is slow, the laminar layer on the electrode surface is wider, so that the concentration of the electrolyte on the plate surface becomes lower, resulting in concentration polarization, the cell voltage rises, and the secondary The chance of reaction occurs, thus limiting the increase of current density during electrolysis; in electrolysis engineering, the electrolytic cell is the key to investment, especially the area of ​​the electrode leads to an increase in the cost of the electrolytic cell, so in the case of ensuring a certain scale of equipment, increase the unit Reducing the electrode area is the key to reducing investment; in addition, the existing electrolytic cell is open, and the gas generated during electrolysis will entrain the electrolyte and volatilize into the plant, resulting in a poor operating environment for the electrolytic plant

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