Anode conductive cooling device for bipolar magnesium electrolytic cell

Abstract

The anode conductive cooling device comprises a graphite electrode and a cooling cylinder arranged on the outer side surface of the graphite electrode in a wrapping mode, and the cooling cylinder comprises an annular heat conduction plate making contact with the graphite electrode and annular partition plates symmetrically arranged at the two ends of the heat conduction plate. A semi-open phase change material filling space is defined by the two annular partition plates and the heat conduction plate. Heat conduction is carried out in the mode that the outer side of the graphite electrode is coated with the heat conduction plate, rapid heat absorption is achieved by filling the phase change material filling space with the phase change material filling layer, and therefore the graphite electrode is efficiently cooled, and the phase change material transfers heat into circulating liquid in the circulating pipe after absorbing heat; and the circulating pipe, the liquid inlet pipe and the liquid outlet pipe are matched with the external cooling liquid container and the circulating pump to quickly circulate for heat exchange, so that the graphite electrode is kept in a low-temperature state and is prevented from being oxidized, corroded and the like due to high temperature, the service life of the graphite electrode is prolonged, the maintenance and replacement frequency of the graphite electrode is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal magnesium production, in particular to an anode conductive cooling device for a bipolar magnesium electrolytic cell. Background Art

[0002] Magnesium electrolysis bipolar cell has important applications in the production of magnesium metal and is one of the key equipment for preparing high-purity and high-quality magnesium metal. The graphite electrode conductive device in the electrolytic cell is made of copper material. In ordinary molten salt electrolytic cells, the electrolyte temperature often exceeds 600°C, which makes the graphite electrodes exposed to the outside of the electrolytic cell in a high temperature state for a long time. When the temperature of the graphite electrode exceeds 200°C, a significant oxidation reaction will occur. In addition, the corrosion rate of the graphite electrode conductive device will be greatly accelerated under the combined action of industrial gas and high temperature environment. The traditional graphite electrode conductive device cannot achieve effective cooling, which directly leads to its relatively short service life, which is difficult to match the service life of the electrolytic cell, and requires frequent replacement and maintenance, which increases the cost of maintenance and replacement. To this end, we propose an anode conductive cooling device for a bipolar magnesium electrolytic cell. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an anode conductive cooling device for a bipolar magnesium electrolytic cell, which can keep the graphite electrode in a low temperature state to avoid oxidation and corrosion due to high temperature, thereby extending its service life, reducing its maintenance and replacement frequency, and reducing maintenance costs, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anode conductive cooling device for a bipolar magnesium electrolytic cell, comprising a graphite electrode and a cooling cylinder coated on the outer surface of the graphite electrode, the cooling cylinder comprising an annular heat conducting plate in contact with the graphite electrode and annular partitions symmetrically arranged at both ends of the heat conducting plate, the two annular partitions and the heat conducting plate enclose a semi-open phase change material filling space, a spiral circulation pipe is sleeved on the outer side of the heat conducting plate, the phase change material filling space is filled with a phase change material filling layer, the phase change material filling layer is also filled in the gap of the circulation pipe, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged at both ends of the circulation pipe; two semi-cylindrical shells are arranged on the outer side of the cooling cylinder, two semi-annular baffles are symmetrically arranged at both ends of the shell, and a plurality of screw holes are evenly opened on the side surfaces of the baffles and the side surfaces of the annular partitions.

[0005] As a preferred technical solution of the utility model, two connecting plates are symmetrically arranged at the two side edges of the shell, and a plurality of screw holes are evenly opened on the connecting plates.

[0006] As a preferred technical solution of the utility model, a sealing gasket is arranged on the connecting plate, and a through hole corresponding to the second screw hole is opened on the sealing gasket.

[0007] As a preferred technical solution of the utility model, through holes corresponding to the liquid inlet pipe and the liquid outlet pipe are respectively opened on the side surfaces of the two shells, and sealing gaskets are arranged inside the through holes.

[0008] As a preferred technical solution of the utility model, a phase change material filling tube is arranged on the upper side of one shell, and a phase change material discharge tube is arranged on the lower side of the other shell, and valves are installed on both the phase change material filling tube and the phase change material discharge tube.

[0009] Compared with the prior art, the utility model has the following beneficial effects: heat conduction is achieved by wrapping the outer side of the graphite electrode with a heat-conducting plate, and a phase-change material filling layer is filled in the phase-change material filling space to achieve rapid heat absorption, thereby efficiently cooling the graphite electrode. After the phase-change material absorbs heat, the heat is transferred to the circulating liquid in the circulating pipe, and then the circulating pipe, the liquid inlet pipe and the liquid outlet pipe cooperate with the external coolant container and the circulating pump to quickly circulate and exchange heat, thereby keeping the graphite electrode in a low temperature state to avoid oxidation and corrosion due to high temperature, thereby extending its service life, reducing its maintenance and replacement frequency, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the utility model without a phase change material filling layer;

[0012] Figure 3 For this utility model Figure 1 A schematic diagram of the front view structure of

[0013] Figure 4 For this utility model Figure 1 Schematic diagram of the side structure.

[0014] In the figure: 1 graphite electrode, 2 cooling cylinder, 21 heat conduction plate, 22 annular partition, 3 shell, 4 baffle, 5 screw hole 1, 6 connecting plate, 7 screw hole 2, 8 phase change material filling layer, 9 circulation pipe, 10 liquid inlet pipe, 11 liquid outlet pipe, 12 sealing gasket, 13 phase change material filling pipe, 14 phase change material discharge pipe, 15 valve. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-4 The utility model provides a technical solution: an anode conductive cooling device for a bipolar magnesium electrolytic cell, comprising a graphite electrode 1 and a cooling cylinder 2 coated on the outer surface of the graphite electrode 1. In order to reduce the impact on the operation of the graphite electrode 1, the cooling cylinder 2 only coats a portion of the graphite electrode 1, which may be one-half, two-thirds, etc.

[0017] The cooling cylinder 2 includes an annular heat conducting plate 21 in contact with the graphite electrode 1 and annular partitions 22 symmetrically arranged at both ends of the heat conducting plate 21. The two annular partitions 22 and the heat conducting plate 21 form a semi-open phase change material filling space. A spiral circulation pipe 9 is sleeved on the outside of the heat conducting plate 21. The phase change material filling space is filled with a phase change material filling layer 8. The phase change material filling layer 8 is preferably paraffin, which can quickly absorb heat and change its shape at high temperature and cool quickly. The heat conducting plate 21 is coated on the outside of the graphite electrode 1 for heat conduction. By filling the phase change material filling layer 8 in the phase change material filling space, rapid heat absorption is achieved, thereby efficiently cooling the graphite electrode 1.

[0018] The phase change material filling layer 8 is also filled in the gap of the circulation pipe 9. The two ends of the circulation pipe 9 are respectively provided with a liquid inlet pipe 10 and a liquid outlet pipe 11. After the phase change material absorbs heat, it transfers the heat to the circulating liquid in the circulation pipe 9. Then, the circulation pipe 9, the liquid inlet pipe 10 and the liquid outlet pipe 11 cooperate with the external coolant container and the circulation pump to quickly circulate and exchange heat, so that the graphite electrode 1 is kept in a low temperature state to avoid oxidation and corrosion due to high temperature, thereby extending its service life, reducing its maintenance and replacement frequency, and reducing maintenance costs.

[0019] A patch temperature sensor can be installed on the outer wall of the graphite electrode 1 to accurately monitor the temperature of its surface. Once the temperature detected by the temperature sensor exceeds the preset threshold range, the system will respond immediately by adjusting the power of the circulating pump in the external coolant device to accelerate the flow rate of the coolant, thereby achieving a rapid cooling function for the graphite electrode 1. This design not only improves the accuracy of temperature control, but also ensures that the graphite electrode can operate stably in a high temperature environment, effectively extending its service life.

[0020] Two semi-cylindrical shells 3 are arranged on the outside of the cooling cylinder 2, and two semi-annular baffles 4 are symmetrically arranged at both ends of the shell 3. The side surfaces of the baffles 4 and the side surfaces of the annular partition 22 are evenly provided with a number of screw holes 5. The shell 3 is used to cooperate with the cooling cylinder 2 to close the phase change material filling space. After the two shells 3 are sleeved on the outside of the cooling cylinder 2, the baffles 4 at both ends are also sleeved on the outside of the corresponding annular partition 22, and then the bolts are screwed into the screw holes 5 to fix the shell 3 to the cooling cylinder 2.

[0021] Preferably, the screw hole 5 on the baffle 4 is a through hole, and the screw hole 5 on the annular partition 22 is a countersunk hole, which can improve the sealing performance after the shell 3 and the cooling cylinder 2 are connected.

[0022] According to a preferred technical solution, two connecting plates 6 are symmetrically arranged at the edges of both sides of the shell 3, and a plurality of screw holes 7 are evenly opened on the connecting plates 6. The connecting plates 6 can be square flanges, and the two shells 3 are fixedly connected by screwing fixing bolts into the screw holes 7, thereby further improving the sealing of the space filled with the phase change material.

[0023] A further preferred technical solution is that a high temperature resistant sealing gasket is provided on the connecting plate 6, and a through hole corresponding to the second screw hole 7 is opened on the sealing gasket. The sealing gasket can make the connection sealing at the connecting plate 6 better and reduce the risk of leakage when the phase change material is deformed into a liquid state due to heat.

[0024] According to the preferred technical solution, the side surfaces of the two shells 3 are respectively provided with through holes corresponding to the liquid inlet pipe 10 and the liquid outlet pipe 11, and high-temperature resistant sealing gaskets 12 are arranged inside the through holes, so as to ensure that the coolant can circulate through the liquid inlet pipe 10 and the liquid outlet pipe 11 in the external coolant equipment without causing leakage of the corresponding material that is heated to become liquid.

[0025] In a preferred technical solution, a phase change material filling tube 13 is provided on the upper side of one shell 3, and a phase change material discharge tube 14 is provided on the lower side of the other shell 3. Valves 15 are installed on the phase change material filling tube 13 and the phase change material discharge tube 14. When it is necessary to maintain or replace the cooling cylinder 2 and the circulation tube 9, the phase change material filling layer 8 is first heated to become liquid, and then the valve 15 on the phase change material discharge tube 14 is opened, and the phase change material can be discharged through the phase change material discharge tube 14 for recovery, and then the corresponding bolts are opened, the shell 3 is removed, and the cooling cylinder 2 and the circulation tube 9 can be maintained or replaced; after the maintenance or replacement is completed, the shell 3 is first installed, and then the valve 15 on the phase change material filling tube 13 is opened, and the phase change material is filled into the phase change material filling space through the phase change material filling tube 13, and then the valve 15 is closed.

[0026] In a preferred technical solution, the circulation tube 9 is in a flat tube shape, so that the surface area on both sides thereof is larger, thereby increasing the contact area between the circulation tube 9 and the phase change material, thereby further improving the cooling efficiency.

[0027] The undisclosed parts in the present utility model are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the attached claims and their equivalents.

Claims

1. An anode conductive cooling device for a bipolar magnesium electrolytic cell, comprising a graphite electrode (1) and a cooling cylinder (2) coated on the outer surface of the graphite electrode (1), characterized in that: The cooling cylinder (2) comprises an annular heat conducting plate (21) in contact with the graphite electrode (1) and annular partitions (22) symmetrically arranged at both ends of the heat conducting plate (21); the two annular partitions (22) and the heat conducting plate (21) enclose a semi-open phase change material filling space; a spiral circulation pipe (9) is sleeved on the outside of the heat conducting plate (21); the phase change material filling space is filled with a phase change material filling layer (8); the phase change material filling layer (8) is also filled in the gap of the circulation pipe (9); and a liquid inlet pipe (10) and a liquid outlet pipe (11) are respectively arranged at both ends of the circulation pipe (9); two semi-cylindrical shells (3) are arranged on the outside of the cooling cylinder (2); two semi-annular baffles (4) are symmetrically arranged at both ends of the shell (3); and a plurality of screw holes (5) are evenly opened on the side surfaces of the baffles (4) and the side surfaces of the annular partitions (22).

2. The anode conductive cooling device for a bipolar magnesium electrolytic cell according to claim 1, characterized in that: Two connecting plates (6) are symmetrically arranged at the two side edges of the shell (3), and a plurality of screw holes (7) are evenly arranged on the connecting plates (6).

3. The anode conductive cooling device for a bipolar magnesium electrolytic cell according to claim 2, characterized in that: The connecting plate (6) is provided with a sealing gasket, and the sealing gasket is provided with a through hole corresponding to the second screw hole (7).

4. The anode conductive cooling device for a bipolar magnesium electrolytic cell according to claim 1, characterized in that: Through holes corresponding to the liquid inlet pipe (10) and the liquid outlet pipe (11) are respectively formed on the side surfaces of the two shells (3), and sealing gaskets (12) are arranged inside the through holes.

5. The anode conductive cooling device for a bipolar magnesium electrolytic cell according to claim 1, characterized in that: A phase change material filling tube (13) is provided on the upper side of one of the shells (3), a phase change material discharge tube (14) is provided on the lower side of the other shell (3), and valves (15) are installed on both the phase change material filling tube (13) and the phase change material discharge tube (14).

6. The anode conductive cooling device for a bipolar magnesium electrolytic cell according to claim 1, characterized in that: The circulation pipe (9) is in the shape of a flat tube.

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