Novel heat-preservation energy-saving electrolytic bath

Abstract

The utility model provides a novel heat-preservation energy-saving electrolytic bath, which comprises a bath body, a heat-preservation layer and a cathode carbon block layer are sequentially built at the bottom of the bath body from bottom to top, grooves are respectively arranged at two ends of the cathode carbon block layer on the same horizontal line along the length direction, and the two grooves are not communicated with each other; the two cathode steel bars are respectively arranged in the grooves of the cathode carbon block layer; the heating electric rod is fixedly mounted on the outer side wall of the tank body through a first bracket; the temperature sensor is arranged on the inner side of the top of the tank body; the temperature display screen is connected with the temperature sensor and is arranged on the outer side of the top of the tank body; wherein the cathode carbon block layer is a special-shaped carbon block, and mutually staggered bulges are arranged on the cathode carbon block layer; the fluctuation of the electrolyte can be weakened through the mutually staggered bulges on the special-shaped cathode carbon block, so that the polar distance is reduced, and the purposes of reducing the voltage drop of the electrolyte and saving the energy consumption are achieved; the electrolytic bath is insulated through the insulating layer, the temperature in the electrolysis process is kept constant, and the purpose of heat preservation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolytic cells, in particular to a novel heat-insulating and energy-saving electrolytic cell. Background Art

[0002] Electrolysis is a commonly used metal extraction process in the smelting field, such as electrolytic aluminum, electrolytic manganese, etc. Its main principle is to pass direct current through an electrolyte solution or melt to cause the electrolyte to react chemically on the electrodes to produce the desired product.

[0003] With the improvement of environmental awareness, in the context of global attention to energy conservation and emission reduction and advocacy of low-carbon and green economy, the high energy consumption of aluminum electrolysis has endangered the development of the industry. Therefore, studying how to save energy and reduce emissions is an important way to revitalize the industry. The energy consumption of aluminum electrolysis depends on the current efficiency and cell voltage during the electrolysis process. At present, international and domestic aluminum electrolysis technology has reached a fairly high level. It is quite difficult to improve the current efficiency. In order to reduce the energy consumption in the aluminum electrolysis process, it can be achieved by reducing the cell voltage. For the existing aluminum electrolytic cell structure, once the cell voltage is reduced, the heat income of the electrolytic cell will be reduced, which will destroy the thermal balance of the electrolytic cell in production, causing the electrolytic cell to be cold, thereby affecting the electrolytic production; in addition, the existing electrolytic cell has serious heat generation, poor insulation effect, and serious heat loss when in use, which seriously affects the electrolysis effect. Therefore, the existing aluminum electrolytic cell energy-saving method and its insulation effect are still not ideal. Utility Model Content

[0004] In order to solve the problems of unsatisfactory energy-saving methods and thermal insulation effects of existing electrolytic cells, the utility model proposes a novel thermal insulation and energy-saving electrolytic cell, which achieves the purpose of reducing electrolyte pressure drop and realizing high efficiency and energy saving by changing the structure of the cathode carbon block; at the same time, the thermal insulation structure of the electrolytic cell is strengthened, and the temperature change in the electrolytic cell is monitored by a temperature sensor, so that the electrolytic cell is heated by a heating rod to keep the electrolytic reaction stable.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel heat-insulating and energy-saving electrolytic cell, comprising:

[0007] A tank body, wherein the bottom of the tank body is sequentially built with a thermal insulation layer and a cathode carbon block layer from bottom to top, and grooves are respectively opened on the same horizontal line along the length direction at both ends of the cathode carbon block layer, and the two grooves are not connected to each other;

[0008] Cathode steel rods, two of which are placed in the grooves of the cathode carbon block layer respectively;

[0009] A heating rod is fixedly mounted on the outer side wall of the tank body through a first bracket;

[0010] A temperature sensor is arranged on the inner side of the top of the tank;

[0011] A temperature display screen is connected to the temperature sensor and is disposed on the top outer side of the tank body;

[0012] Among them, the cathode carbon block layer is a special-shaped carbon block, on which there are mutually staggered protrusions; the insulation layer includes an asbestos board layer, a first insulation board, a refractory insulation brick layer, and a heat-insulating insulation brick layer from bottom to top.

[0013] Optionally, the heating rod is wrapped in an S-shape around the outer wall of the tank.

[0014] Optionally, a second insulation plate is provided on the outside of the heating rod, the second insulation plate and the heating rod are connected via a second bracket, and the second insulation plate and the trough body form a semi-wrapped structure.

[0015] Optionally, an anti-seepage material layer is provided between the thermal insulation brick layer and the cathode carbon block layer.

[0016] Optionally, the cathode steel rod is a high-conductivity steel rod.

[0017] Optionally, the space between the cathode steel rod side wall and the groove is filled with steel rod paste.

[0018] The tank body is formed by compression molding of RPP material.

[0019] Optionally, the temperature sensor is made of high temperature resistant material.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: the electrolyte fluctuation can be weakened by the mutually staggered protrusions on the special-shaped cathode carbon block, thereby reducing the electrode distance, achieving the purpose of reducing the electrolyte pressure drop and saving energy consumption; a temperature sensor is provided to monitor the temperature change in the electrolytic cell, and when the temperature reaches the preset temperature, the heating rod is turned on to heat the electrolytic cell to maintain the stability of the electrolytic reaction; the electrolytic cell is insulated by the insulation layer to keep the temperature constant during the electrolysis process, thereby achieving the purpose of insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 A top view of an embodiment of the utility model;

[0024] Figure 3 It is a schematic structural diagram of a special-shaped carbon block according to an embodiment of the utility model.

[0025] Figure numerals: 1. trough body; 11. first bracket; 2. insulation layer; 21. asbestos board layer; 22. first insulation board; 23. refractory insulation brick layer; 24. thermal insulation brick layer; 3. cathode carbon block layer; 4. cathode steel rod; 5. heating rod; 6. temperature sensor; 7. temperature display screen; 8. second insulation board; 81. second bracket; 9. anti-seepage material layer. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] In the description of the present invention, it should be understood that the terms "lateral", "length", "up", "down", "top", "bottom", "inside", "outside", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships conventionally placed when the product of the present invention is used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0031] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0032] The utility model embodiment provides a novel heat-insulating and energy-saving electrolytic cell, comprising:

[0033] A tank body 1, wherein a thermal insulation layer 2 and a cathode carbon block layer 3 are sequentially built on the bottom of the tank body 1 from bottom to top, and grooves are respectively opened on the same horizontal line along the length direction at both ends of the cathode carbon block layer 3, and the two grooves are not connected to each other;

[0034] Cathode steel rods 4, two of the cathode steel rods 4 are respectively placed in the grooves of the cathode carbon block layer 3; specifically, a gap is provided between the ends of the two cathode steel rods 4 extending into the grooves and the grooves, which serves as a free expansion and contraction space for the cathode steel rods 4 after being heated during the operation of the electrolytic cell;

[0035] The temperature sensor 6 is disposed on the inner side of the top of the tank body 1 to monitor the temperature inside the tank body 1;

[0036] A temperature display screen 7, connected to the temperature sensor 6, disposed on the top outer side of the tank body 1, and used to display the temperature monitored by the temperature sensor 6;

[0037] The heating rod 5 is fixedly mounted on the outer wall of the tank body 1 through the first bracket 11. When the temperature displayed on the temperature display screen 7 is lower than the preset temperature, the heating rod 5 is turned on to heat the tank body 1 to keep the electrolysis reaction stable.

[0038] Among them, the cathode carbon block layer 3 is a special-shaped carbon block with mutually staggered protrusions on it; the insulation layer 2 includes an asbestos board layer 21, a first insulation board 22, a refractory insulation brick layer 23, and a heat-insulating insulation brick layer 24 from bottom to top, which effectively insulates the temperature in the tank body 1 and keeps the temperature constant during the electrolysis process.

[0039] Specifically, the protrusions on the special-shaped carbon block are a plurality of transverse rows of protrusions, and the protrusions between the rows are staggered, so that the electrolyte can flow between the protrusions, and the flow rate of the electrolyte is stable and low.

[0040] It should be noted that the height of the electrolyte liquid layer on the upper surface of the protrusion should not be too high or too low; if it is too low, the protrusion will easily be exposed to the electrolyte melt, causing electrochemical corrosion of the protrusion; if it is too high, the wave reduction effect of the protrusion will be reduced; the more suitable height of the electrolyte liquid layer should be about 5 cm higher than the upper surface of the protrusion.

[0041] In order to heat the outer surface of the tank body 1 evenly, the heating rod 5 is wrapped around the outer wall of the tank body 1 in an S shape, thereby improving the heating efficiency.

[0042] Furthermore, a second insulation plate 8 is provided on the outside of the heating rod 5, and the second insulation plate 8 is connected to the heating rod 5 through a second bracket 81. The second insulation plate 8 and the trough body 1 form a semi-wrapped structure, which can further insulate the trough body 1 and reduce heat loss.

[0043] Furthermore, an impermeable material layer 9 is provided between the heat-insulating brick layer 24 and the cathode carbon block layer 3. The impermeable material has the characteristics of low thermal conductivity and strong anti-penetration ability, which can prevent the penetration and erosion of aluminum liquid and liquid quality. The use of the impermeable material can also extend the service life of the electrolytic cell.

[0044] Furthermore, the cathode steel rod 4 is a high-conductivity steel rod, thereby improving the electrical conductivity of the steel rod and significantly reducing the pressure drop of the steel rod itself, thereby achieving the purpose of reducing the pressure drop at the bottom of the electrolytic cell. At the same time, as the electrical conductivity of the steel rod is improved, the horizontal current in the electrolytic cell is optimized, thereby achieving smooth and efficient operation of the electrolytic cell.

[0045] Specifically, steel rod paste is filled between the side wall of the cathode steel rod 4 and the groove, which is used to adhere the cathode steel rod 4 to the cathode carbon block layer 3, thereby connecting and tightening the cathode steel rod 4, while reducing the contact voltage drop between the cathode carbon block layer 3 and the cathode steel rod 4, and further reducing the pressure drop at the bottom of the electrolytic cell.

[0046] Furthermore, the cell body 1 is formed by compression molding of RPP material, which is a reinforced polypropylene material having excellent wear resistance, corrosion resistance and good heat resistance and thermal insulation properties. Compared with electrolytic cells made of other materials, it increases the service life of the electrolytic cell and greatly saves costs. At the same time, its insulation ensures the safety and reliability of the electrolytic cell.

[0047] Since the temperature sensor 6 is placed inside the tank body 1 and will be affected by the high temperature of the electrolytic reaction, the temperature sensor 6 is made of high temperature resistant material so that it can work normally in a high temperature environment.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new type of heat-insulating and energy-saving electrolytic cell, characterized in that: include: A tank body (1), wherein the bottom of the tank body (1) is sequentially built with a thermal insulation layer (2) and a cathode carbon block layer (3) from bottom to top, and grooves are respectively provided at both ends of the cathode carbon block layer (3) on the same horizontal line along the length direction, and the two grooves are not connected to each other; Cathode steel rods (4), two cathode steel rods (4) are respectively placed in the grooves of the cathode carbon block layer (3); A heating rod (5) is fixedly mounted on the outer wall of the tank body (1) via a first bracket (11); A temperature sensor (6) is arranged on the inner side of the top of the tank body (1); A temperature display screen (7), connected to the temperature sensor (6), and disposed on the top outer side of the tank body (1); The cathode carbon block layer (3) is a special-shaped carbon block provided with mutually staggered protrusions; the thermal insulation layer (2) comprises, from bottom to top, an asbestos board layer (21), a first thermal insulation board (22), a refractory thermal insulation brick layer (23), and a thermal insulation brick layer (24).

2. The novel heat-insulating and energy-saving electrolytic cell according to claim 1 is characterized in that: The heating rod (5) is wound around the outer wall of the tank body (1) in an S-shape.

3. The novel heat-insulating and energy-saving electrolytic cell according to claim 2 is characterized in that: A second insulation plate (8) is provided on the outside of the heating rod (5); the second insulation plate (8) and the heating rod (5) are connected via a second bracket (81); the second insulation plate (8) and the tank body (1) form a semi-wrapped structure.

4. The novel heat-insulating and energy-saving electrolytic cell according to claim 1 is characterized in that: An anti-seepage material layer (9) is also provided between the heat-insulating brick layer (24) and the cathode carbon block layer (3).

5. The novel heat-insulating and energy-saving electrolytic cell according to claim 1 is characterized in that: The cathode steel rod (4) is a high-conductivity steel rod.

6. The novel heat-insulating and energy-saving electrolytic cell according to claim 5 is characterized in that: The space between the side wall of the cathode steel rod (4) and the groove is filled with steel rod paste.

7. The novel heat-insulating and energy-saving electrolytic cell according to claim 1 is characterized in that: The tank body (1) is formed from RPP material by compression molding.

8. The novel heat-insulating and energy-saving electrolytic cell according to claim 1 is characterized in that: The temperature sensor (6) is made of high temperature resistant material.

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