CN203807570U - Electrolytic bath - Google Patents

Abstract

The utility model discloses an electrolytic cell, which comprises a cell body. The cell body is provided with a liquid inlet and a liquid outlet. It includes a main liquid inlet pipe installed on one side of the liquid inlet and auxiliary liquid inlet pipes on at least one side wall of the front and back, and a plurality of liquid inlet holes are opened on the main liquid inlet pipe and the auxiliary liquid inlet pipe. The height of the liquid inlet holes on the liquid pipe is lower than the lower edge of the electrode plate, and the liquid inlet holes on the auxiliary liquid inlet pipe are evenly distributed between the cathode plate and the anode plate along the length direction of the tank body. The effect is: the original traditional horizontal liquid feeding method is changed to the horizontal and lateral liquid feeding method at the same time, which improves the replacement efficiency of the electrolyte, avoids the "dead zone" between the plates, and is beneficial to reduce electrode polarization and Concentration polarization increases the current density, further improves the current efficiency, reduces energy consumption, and at the same time prevents the liquid inlet hole from being blocked by the precipitation of powder or anode slime.

Description

an electrolytic cell

technical field

The utility model belongs to electrolytic equipment, in particular to an electrolytic tank whose electrolyte feeding mode has been changed. Background technique

As the key equipment of the electrolysis reaction, the electrolytic cell is currently developing in the direction of large capacity and low energy consumption. The quality of its structural design directly affects the level of electrolysis efficiency and energy consumption. A large number of studies have shown that the traditional electrolyzer still has the following defects: (1) the mass transfer rate of the electrolyte is limited, which limits the flow rate of the electrolyte and cannot be increased indefinitely; (2) the specific surface area of the cathode is limited, making the plate-shaped cathode unit Participation of area mass substances in the reaction decreases; (3) The occurrence of side reactions of water splitting under high current density leads to further increase of overpotential and energy consumption.

As early as the 1980s, some scholars had studied the electrolyte flow law in the zinc electrolytic cell, and pointed out that the electrolyte in the flow area of the electrolytic cell is dominated by fully mixed flow; although the gas generated on the electrode can cause electrolysis between electrodes. The liquid is strongly stirred, but the main flow of the electrolyte cannot pass directly between the electrodes, so the electrolyte between the electrodes is regarded as a "dead zone", which is also the unreasonable circulation mode of the electrolyte in the existing electrolysis. In the past small-capacity electrolyzers, the impact of the flow field formed by the electrolyte flow on production was relatively small, and people did not pay enough attention to it; but when the capacity of the electrolyzer changed from small to large, the flow of electrolyte The formed flow field will have a certain impact on production.

Utility model content

In order to solve the above technical problems, the utility model provides an electrolytic cell. By changing the installation method of the liquid inlet pipe, the flow direction of the electrolyte is changed, thereby improving the electrolysis efficiency.

In order to achieve the above object, the technical scheme adopted in the utility model is as follows:

An electrolytic cell, comprising a cell body, the cell body is provided with a liquid inlet and a liquid outlet, the key point is that a liquid inlet pipe is installed on the inner cell wall of the cell body, and the liquid inlet pipe includes The main liquid inlet pipe on one side of the liquid inlet and the auxiliary liquid inlet pipes on at least one side wall of the front and back are provided with a plurality of liquid inlet holes on the main liquid inlet pipe and the auxiliary liquid inlet pipe. The height of the liquid inlet hole is lower than the lower edge of the electrode plate, and the liquid inlet holes on the auxiliary liquid inlet pipe are evenly distributed between the cathode plate and the anode plate along the length direction of the tank body.

The electrolytic cell adopts the traditional liquid inlet plus the side porous auxiliary liquid inlet method, that is, the traditional liquid inlet plus the circulation method of the electrolyte flowing parallel to the electrode plate surface. This liquid feeding method can effectively reduce the "dead zone" between the cathode and the anode, which is beneficial to reduce electrode polarization and concentration polarization, increase the current density, and further reduce the cell voltage. It is very suitable for the production of plate and powder materials such as electrolytic copper, electrolytic nickel, electrolytic zinc, electrolytic manganese, electrolytic cobalt, and electrolytic lead, as well as the refining, electrolytic dissolution, and electrometallurgy of secondary resources.

In order to further optimize the liquid inlet effect, both the front side wall and the rear side wall of the tank body are provided with auxiliary liquid inlet pipes, and the two are installed and fixed according to different heights.

To further describe, when the front side wall and the rear side wall of the tank are provided with auxiliary liquid inlet pipes, the middle part of the main liquid inlet pipe communicates with the liquid inlet, and the two ends of the main liquid inlet pipe respectively pass through a section of extension pipe Connect the auxiliary liquid inlet tube on the front side wall with the auxiliary liquid inlet tube on the rear side wall.

In order to ensure the liquid inlet flow rate, one end of the auxiliary liquid inlet pipe is connected to the main liquid inlet pipe, and the other end is a closed end.

In order to improve the replacement efficiency of the electrolyte, the height of the liquid inlet is lower than that of the liquid outlet.

In order to keep the liquid inlet flow of each liquid inlet pipe constant, a flow control valve is also arranged at the liquid inlet end of the auxiliary liquid inlet pipe.

In order to facilitate the precipitation of anode slime, the bottom of the tank body is an inclined bottom.

The beneficial effects of the utility model are:

Using the above technical scheme, the original traditional horizontal liquid feeding method is changed to a horizontal and lateral mixed liquid feeding method, which improves the replacement efficiency of the electrolyte, avoids the occurrence of "dead zones" between the plates, and is beneficial to reduce electrode polarization. and concentration polarization to increase the current density, and at the same time, the auxiliary liquid inlet pipe is arranged on the side wall to avoid the clogging of the liquid inlet hole by the precipitation of powder or anode slime.

Description of drawings

Fig. 1 is the system installation structure schematic diagram of the present utility model;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic structural view of Fig. 2 after the electrode plate is installed;

Fig. 4 is the B-B sectional view of Fig. 1;

FIG. 5 is a schematic structural diagram of the liquid inlet pipe 4 in FIG. 1 .

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is further described.

As shown in Figures 1 to 5, an electrolytic cell includes a cell body 1, and the cell body 1 is provided with a liquid inlet 2 and a liquid outlet 3, and the height of the liquid inlet 2 is lower than the height of the liquid outlet 3 A liquid inlet pipe 4 is installed on the inner tank wall of the tank body 1, and the liquid inlet pipe 4 includes a main liquid inlet pipe installed on one side of the liquid inlet 2 and an auxiliary liquid inlet pipe on at least one side wall of the front and rear , for this embodiment, the front side wall and the rear side wall of the tank body 1 are provided with auxiliary liquid inlet pipes, and the two are installed and fixed according to different heights, usually an auxiliary liquid inlet pipe is installed at a distance from the electrode At the height of 1/5 of the bottom of the plate 6, another auxiliary liquid inlet pipe is installed at the height of 3/5 of the bottom of the electrode plate 6.

In order to ensure the liquid inlet effect, multiple liquid inlet holes are opened on the main liquid inlet pipe and the auxiliary liquid inlet pipe. The height of the liquid inlet holes on the main liquid inlet pipe is lower than the lower edge of the electrode plate, and the auxiliary liquid inlet pipe The liquid inlet holes on the top are evenly distributed between the cathode plate and the anode plate along the length direction of the tank body 1 .

It can be seen from Fig. 5 that when the front side wall and the rear side wall of the tank body 1 are provided with auxiliary liquid inlet pipes, the middle part of the main liquid inlet pipe communicates with the liquid inlet 2, and the two ends of the main liquid inlet pipe One end of the auxiliary liquid inlet pipe on the front side wall and the auxiliary liquid inlet pipe on the rear side wall are respectively connected through a section of extension pipe. A flow control valve 5 is also arranged at the liquid inlet end of the auxiliary liquid inlet pipe.

In order to ensure the precipitation of anode slime, it can also be seen from Fig. 2 and Fig. 3 that the bottom of the tank body 1 is an inclined bottom.

Finally, it should be noted that the above description is only a preferred embodiment of the utility model, and under the inspiration of the utility model, those skilled in the art can make many A similar representation, such transformations all fall within the protection scope of the present utility model.

Claims (7)

1. an electrolyzer, comprise cell body (1), on this cell body (1), be provided with fluid inlet (2) and liquid outlet (3), it is characterized in that: liquid-inlet pipe (4) is installed on the internal groove side wall of described cell body (1), this liquid-inlet pipe (4) comprises the auxiliary liquid-inlet pipe at least one sidewall of main liquid-inlet pipe and front and back that is arranged on fluid inlet (2) one sides, on described main liquid-inlet pipe and auxiliary liquid-inlet pipe, all offer a plurality of inlet openings, inlet opening height on main liquid-inlet pipe is lower than the lower rim of battery lead plate, inlet opening on auxiliary liquid-inlet pipe is evenly distributed between negative plate and positive plate along the length direction of cell body (1).

2. a kind of electrolyzer according to claim 1, is characterized in that: front side wall and the rear wall of described cell body (1) are provided with auxiliary liquid-inlet pipe, and the two installs fixing according to different height.

3. a kind of electrolyzer according to claim 2, it is characterized in that: when the front side wall of cell body (1) and rear wall are provided with auxiliary liquid-inlet pipe, the middle part of described main liquid-inlet pipe communicates with fluid inlet (2), and the two ends of main liquid-inlet pipe are respectively by the auxiliary liquid-inlet pipe on one section of extension tube connection front side wall and the auxiliary liquid-inlet pipe on rear wall.

4. a kind of electrolyzer according to claim 3, is characterized in that: one end of described auxiliary liquid-inlet pipe is connected with main liquid-inlet pipe, and the other end is blind end.

5. a kind of electrolyzer according to claim 1, is characterized in that: the height of described fluid inlet (2) is lower than the height of liquid outlet (3).

6. a kind of electrolyzer according to claim 1, is characterized in that: the liquid feeding end at described auxiliary liquid-inlet pipe is also provided with flowrate control valve (5).

7. a kind of electrolyzer according to claim 1, is characterized in that: the bottom land of described cell body (1) is wedged bottom.