A turbulent flow electrolyzer and a turbulent flow electrolysis production system composed of turbulent flow electrolyzers

Abstract

The invention discloses a turbulent electrolytic cell and a turbulent electrolytic production system consisting of the turbulent electrolytic cell. The turbulent electrolytic cell comprises a cell body, and a diaphragm frame for dividing the internal space of the cell body into an anode chamber and a cathode chamber; a liquid outlet communicated with the anode chamber is formed in the side wall of the cell body; an overflow port is formed in the upper part of the side wall of the cell body; and a liquid inlet pipe is arranged in the cell body. The turbulent electrolytic production system consisting of the turbulent electrolytic cell comprises an electrolysis system, a circular purifying system, a cooling system and an adjusting system communicated in sequence; the electrolysis system includes an electrolytic cell set and a circulating liquid gathering tank; overflow ports and drain ports of the electrolytic cell set communicate with the circulating liquid gathering tank; and the electrolysis system is connected with the circular purifying system through the circulating liquid gathering tank, and is connected with the adjusting system through liquid inlets pipes of the electrolytic cell set. The turbulent electrolytic cell solves the electrode concentration polarization and bubble effect phenomenon, and can prominently improve the electrolysis current efficiency; and the turbulent electrolytic production system consisting of the turbulent electrolytic cell can realize large scale, low energy consumption, automation and mechanization of the production of electrolytic manganese metal, and is higher in promotion prospect.

Description

technical field [0001] The invention relates to a metal diaphragm electrolysis process technology in the technical field of hydrometallurgy, and specifically refers to a turbulent flow electrolysis cell and a turbulent flow electrolysis production system composed of the turbulence electrolysis cell. Background technique [0002] China is the world's largest producer and exporter of electrolytic manganese metal, with production capacity and output exceeding 98% of the world's total. By 2011, China's electrolytic manganese production capacity had reached 2.4 million tons. Now, electrolytic manganese metal is the backbone of many regions in my country industry. [0003] Over the years, there has been no breakthrough in the production process of electrolytic manganese metal, and it is still a traditional process (the technology of the US Bureau of Mines in the 1930s). Due to the limitation of technological level, low level of equipment and backward degree of automation, the stat...

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Problems solved by technology

[0007] 1. The existing electrolytic cell has a built-in cooling water pipe. The electrolysis temperature is controlled by the operator manually adjusting the cooling water flow rate based on experience. The cooling water pipe is generally made of stainless steel pipe or engineering plastic corrugated pipe. The heat exchange coefficient is low, the cooling effect is poor, the cooling water volume is large, and the temperature It is difficult to control, the temperature in the tank is uneven, and the temperature of the series of electrolytic cells cannot be balanced, which greatly affects the electrolysis efficiency

[0008] 2. The concentration of the electrolyte in the existing electrolyzers is controlled by manual adjustment of the electrolyte supply flow rate by the operator based on experience. The electrolyte concentration of each electrolyzer in the series cannot be balanced, resulting in different reaction conditions of the electrolyzers in the series

[0009] 3. The pH value of the existing electrolyzer solution is adjusted by the operator using the ammonia water pipe to add ammonia water. The pH of the electrolyte solution is extremely difficult to control and stabilize, which seriously affects the electrolysis operation. (OH) 2 Precipitation will lead to the deterioration of the condition of the electrolytic tank, and in severe cases, it may even cause the electrolysis to fail to proceed normally

[0010] 4. The existing electrolytic cell adopts the method of separate inflow of electrolyte - separate outflow of anolyte for electrolyte supply, which is easy to maintain the balance of electrolyte concentration in the electrolytic cell. Due to the small flow rate of the liquid supply in the electrolytic cell, the flow rate of the liquid in the cell is low. The concentration of the electrolyte is extremely uneven, and the concentration polarization is obvious, which deteriorates the electrolysis conditions and makes it difficult to produce under high current density, which seriously affects the current efficiency and production efficiency

[0011] 5. Because the existing technology cannot solve the phenomenon of concentration polarization, it is difficult to enlarge the cathode plate. As far as the industry is concerned, a single production line (with a scale of 10,000 tons / year) often needs to install more than 10,000 pieces of cathode plates to reach the industry standard. Access conditions, the number of electrolytic cells is more than 100, the series voltage drop is large, the number of cathode and anode plates is large, it is difficult to manage, it is not suitable for operation, the workload is large, and the production cost is high

[0012] 6. The cleaning of the anode slime in the existing electrolytic cell (cleaning the tank) is done manually by the staff in the tank on a regular or irregular basis, which is time-consuming and labor-intensive, and the working environment is dirty and messy, and the consumption of clean water is large, which is not conducive to cleaning Production

At the same time, the number of electrolytic cells is large, and the number of cleaning cells also increases proportionally. The traditional method of cleaning cells is to discharge all the electrolytic catholyte to the anolyte for recovery, which increases the consumption of new liquid.

[0013] 7. The existing electrolytic metal manganese electrolysis operation program cannot realize the automatic control of process parameters due to the limitation of process conditions

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