Leak-proof electrolytic cell tank

Abstract

This utility model relates to the field of electrolytic cell material tank technology, and provides a leak-proof electrolytic cell material tank, including a material tank cover and a material tank body; an exhaust groove opened on the top of the material tank cover; a composite guide mechanism assembled on the top of the exhaust groove, the composite guide mechanism being used to separate dust and gas; an exhaust pipe assembly assembled on the upper part of the material tank cover, the exhaust pipe assembly being used to directionally output gas to the outside; and a multi-layer sealing mechanism being provided between the mounting surfaces of the material tank cover and the material tank body. The structure provided by this solution, through a converging tube, throat, and diffuser, creates a local negative pressure at the throat, actively drawing in dust-laden gas without external power. The gas in the diffuser generates a high-speed swirling flow through the spiral guide vanes, using centrifugal force to throw dust against the inner wall of the settling chamber, and then the dust settles due to the impact of the inclined baffles, effectively avoiding the problem of filter material embrittlement and damage under high temperature and high corrosion conditions.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrolytic cell material boxes, and particularly relates to a leak-proof electrolytic cell material box. Background Technology

[0002] In the aluminum electrolysis production process, the alumina supply to the electrolytic cell utilizes a dense phase conveying system. Alumina is first transported from the purified alumina silo to the alumina hopper at the top of the electrolytic cell. Then, controlled by a cell control machine, alumina is added to the electrolytic cell as needed via a constant-volume feeder. During the dense phase conveying process, low-pressure air fluidizes the alumina in the chute through a permeable plate. The fluidized alumina flows forward and is eventually delivered to the hopper. The alumina falls into the hopper through a closed feed port, while the low-pressure air is discharged through a closed return air duct.

[0003] Chinese patent CN202221580068.8 discloses an electrolytic cell feed box capable of venting and preventing material drift. The paper states that it "includes an anti-drift device and a closed feed box, characterized in that: the closed feed box is equipped with an anti-drift device, which includes a filter bag, a support frame, and an exhaust pipe. The filter bag is fitted onto the support frame and secured with a pipe clamp. The support frame is connected to the upper end of the exhaust pipe via a connector, and the lower end of the exhaust pipe is fixedly installed on the closed feed box. This invention can prevent material from drifting from the electrolytic cell feed box onto the furnace surface inside the cell, and it also vents air, ensuring stable electrolytic production."

[0004] However, in the above-mentioned solutions, the exhaust bags are subjected to high temperature and high corrosiveness conditions for extended periods, causing their fibers to rapidly become brittle and break. Once a hole appears, dust-laden gas will leak directly into the upper structure of the electrolytic cell, resulting in severe material loss and environmental pollution. This is one of the main sources of fugitive emissions. Fine alumina dust is highly hygroscopic and easily clumps between the bag fibers, leading to blockage of the exhaust channels. After blockage, the internal pressure of the material tank cannot be released, which will instead exacerbate leakage from other weak sealing points and even affect the accuracy of material feeding. This forces companies to perform frequent cleaning or replacement. For example, a series with 282 400kA electrolytic cells can incur tens of thousands of yuan in annual bag replacement costs alone, and it also increases the labor intensity of workers. Therefore, designing a leak-proof electrolytic cell material tank is essential. Utility Model Content

[0005] This utility model provides a leak-proof electrolytic cell material box, which aims to solve the problem that the fibers of the exhaust bag will quickly become brittle and break when it is in a long-term high-temperature and high-corrosive working condition.

[0006] This utility model is implemented as follows: a leak-proof electrolytic cell tank includes a tank cover and a tank body; an exhaust trough formed on the top of the tank cover; a composite guide mechanism assembled on the top of the exhaust trough, the composite guide mechanism being used to separate dust and gas; an exhaust pipe assembly assembled on the upper part of the tank cover, the exhaust pipe assembly being used to directionally output gas to the outside; and a multi-layer sealing mechanism is provided between the mounting surfaces of the tank cover and the tank body.

[0007] Preferably, the composite exhaust mechanism includes: a converging tube fixedly installed on the top of the exhaust trough, The top of the converging tube is connected to a throat tube, the top of the throat tube is connected to a diffuser tube, a spiral guide vane is fixed to the middle of the inner cavity of the diffuser tube, a settling cavity is opened at the top of the diffuser tube, an inclined baffle is fixed to the inner side of the settling cavity, and a through groove is opened in the center of the inclined baffle.

[0008] Preferably, the exhaust pipe assembly includes: a threaded connector fixedly mounted on the top of the diffuser pipe. An extension interface is threaded onto the outer wall of the threaded joint, and a high-temperature resistant hose is connected to one side of the extension interface. A bracket is slidably fitted onto the surface of the high-temperature resistant hose.

[0009] Preferably, one side of the settling chamber is connected to a return pipe, and the other end of the return pipe is connected to the top of the hopper cover.

[0010] Preferably, the multi-layer sealing mechanism includes: a primary sealing layer fixedly installed on one side of the material box cover and the material box body, a reinforcing sealing layer coated on the outer side of the primary sealing layer, and a sealing gasket fixedly connected to the outer side of the reinforcing sealing layer.

[0011] Preferably, both the outer sides of the hopper cover and the hopper body are fixedly connected to flange interfaces, and the inner sides of the flange interfaces are provided with threaded grooves, and the inner sides of the threaded grooves are threaded with connecting screws.

[0012] Preferably, a constant-volume discharge pipe is connected to the center of the top of the material box cover, and a discharge pipe is connected to the bottom of the material box body.

[0013] Preferably, the inner wall of the larynx is mirror-polished.

[0014] Compared with related technologies, the leak-proof electrolytic cell tank provided by this utility model has the following beneficial effects: 1. Through the structure of the converging tube, throat, and diffuser, a local negative pressure is formed at the throat, which actively draws in dust-laden gas without the need for external power. The gas generates a high-speed swirling flow in the diffuser through the action of the spiral guide vanes. The centrifugal force is used to throw the dust against the inner wall of the settling chamber, and then the dust settles due to the collision of the inclined baffle. This effectively avoids the problem of filter material embrittlement and damage under high temperature and high corrosion conditions.

[0015] 2. By adopting a multi-seal structure at the joint surface between the material box cover and the main body, a gradient sealing effect is formed, which effectively improves the long-term sealing reliability under high temperature and pressure fluctuations, prevents dust material leakage, and directly transports the dust collected in the settling chamber back into the material box through the return pipe, avoiding the accumulation of dust in the exhaust mechanism, effectively reducing the frequency of manual cleaning, and effectively enabling the material to complete internal circulation and recycling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exhaust pipe assembly of this utility model after separation. Figure 3 This is a schematic diagram of the connection structure between the material box cover and the material box body of this utility model; Figure 4 This is a top view of the connection structure between the material box cover and the material box body of this utility model; Figure 5 This is a schematic diagram of the internal connection structure of the composite guide mechanism of this utility model.

[0017] In the diagram: 1. Tank cover; 2. Tank body; 3. Exhaust trough; 4. Composite guide mechanism; 41. Converging tube; 42. Throat; 43. Diffuser; 44. Spiral guide vane; 45. Settling chamber; 46. Angled baffle; 5. Exhaust pipe assembly; 51. Threaded connector; 52. Extension interface; 53. High-temperature resistant hose; 54. Bracket; 6. Multi-layer sealing mechanism; 61. Primary sealing layer; 62. Reinforced sealing layer; 63. Sealing gasket; 7. Return pipe; 8. Flange interface; 9. Threaded groove; 10. Connecting screw; 11. Constant volume discharge pipe; 12. Discharge pipe. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] Example 1 A preferred embodiment of the leak-proof electrolytic cell hopper provided by this utility model is, for example... Figures 1 to 5 As shown: A leak-proof electrolytic cell tank includes a tank cover 1 and a tank body 2; an exhaust trough 3 opened on the top of the tank cover 1; a composite guide mechanism 4 assembled on the top of the exhaust trough 3, the composite guide mechanism 4 being used to separate dust and gas; an exhaust pipe assembly 5 assembled on the upper part of the tank cover 1, the exhaust pipe assembly 5 being used to directionally output gas to the outside; and a multi-layer sealing mechanism 6 being provided between the mounting surfaces of the tank cover 1 and the tank body 2.

[0021] It should be noted that some existing leak-proof electrolytic cell tanks still have certain shortcomings in actual use. The comparison document addresses the problem that the fibers of the exhaust filter bag will quickly become brittle and break when it is exposed to high temperature and high corrosive conditions for a long time.

[0022] In this embodiment, when the electrolytic cell is fed through the constant-volume feeding pipe 11, the air inside the tank is disturbed and mixes with fine alumina dust, forming a dust-laden positive-pressure gas. This positive-pressure gas naturally flows into the composite guide mechanism 4 at the top of the tank cover 1, first entering the converging pipe 41, where the flow cross-section decreases and the airflow initially accelerates. The gas then enters the narrowest section, the throat 42, where the flow velocity reaches its peak. At this point, the static pressure of the gas at the throat 42 drops to its lowest level, forming a local negative pressure zone. The high-speed airflow enters the diffuser 43 from the throat 42. After encountering the spiral guide vane 44, the gas is forced to rotate at high speed. The rotating airflow carrying dust enters the settling chamber 45 at the top. Under the action of centrifugal force, the dust particles are thrown towards the inner wall of the settling chamber 45. The dust collides with the inclined baffle 46 fixed in the cavity. After colliding with the baffle, the dust loses kinetic energy and settles downward under the action of gravity. Some of the dust falls directly into the diffuser 43 and throat 42 below, and finally falls back into the material box by gravity. Some of the dust enters the return pipe 7, which directly transports the dust collected at the bottom of the settling chamber 45 back to the top of the material box, realizing rapid material recovery. After centrifugation, collision and settling, most of the dust has been removed. The gas enters the end of the exhaust system through the penetration groove in the center of the inclined baffle 46. The gas passes through the threaded joint 51 and the extension interface 52 in sequence and enters the high-temperature resistant hose 53. The high-temperature resistant hose 53 is fixed by the bracket 54 and guides the gas to the designated collection system for discharge according to the design direction.

[0023] In a further preferred embodiment of the present invention, flange interfaces 8 are fixedly connected to the outer sides of both the material box cover 1 and the material box body 2, and threaded grooves 9 are opened on the inner side of both flange interfaces 8, and connecting screws 10 are threadedly connected to the inner side of both threaded grooves 9.

[0024] In this embodiment, by using a wrench to tighten the connecting screws 10 in sequence, it can be ensured that the huge flange surface pressure is evenly applied to the multi-layer sealing mechanism 6, avoiding seal failure caused by uneven force.

[0025] In a further preferred embodiment of the present invention, a constant-volume discharge pipe 11 is connected to the center of the top of the material box cover 1, and a discharge pipe 12 is connected to the bottom of the material box body 2.

[0026] In this embodiment, the material is transported into the material box body 2 by the constant volume feeding pipe 11, and the material is output from the material box to the electrolytic cell for processing through the discharge pipe 12.

[0027] In a further preferred embodiment of this utility model, the inner wall of the throat tube 42 is mirror polished.

[0028] In this embodiment, by reducing the surface roughness of the inner wall of the throat 42, the adhesion and accumulation of dust in the critical narrow channel is greatly reduced.

[0029] Example 2 Based on Embodiment 1, the present invention provides a preferred embodiment of a leak-proof electrolytic cell material box. For example Figures 1 to 5 As shown: The composite guide and exhaust mechanism 4 includes: a converging pipe 41 fixedly installed on the top of the exhaust trough 3, the top of the converging pipe 41 is connected to a throat pipe 42, the top of the throat pipe 42 is connected to a diffuser pipe 43, a spiral guide vane 44 is fixedly connected to the middle of the inner cavity of the diffuser pipe 43, a settling chamber 45 is opened at the top of the diffuser pipe 43, an inclined baffle 46 is fixedly connected to the inner side of the settling chamber 45, and a through groove is opened at the center of the inclined baffle 46.

[0030] In this embodiment, by utilizing the changes in the cross-section of the converging tube 41, throat 42, and diffuser 43, a high-speed low-pressure zone is generated at the throat 42, forming an active suction force to draw out the dust-laden gas in the material box, preventing leakage caused by the accumulation of internal positive pressure. The spiral guide vane 44 converts the high-speed airflow into a strong swirling flow, providing power for subsequent centrifugal separation. The dust is thrown towards the cavity wall by centrifugal force and collides with the inclined baffle 46. Due to inertia, it is separated from the airflow streamline, realizing gas-solid separation. Finally, the penetration groove serves as the outlet for purified gas.

[0031] In a further preferred embodiment of this utility model, the exhaust pipe assembly 5 includes: fixedly installed on The top of the diffuser tube 43 has a threaded connector 51, and an extension interface 52 is threadedly connected to the outer wall of the threaded connector 51. A high-temperature resistant hose 53 is connected to one side of the extension interface 52, and a bracket 54 is slidably sleeved on the surface of the high-temperature resistant hose 53.

[0032] In this embodiment, the threaded connector 51 and the extension interface 52 facilitate the installation and disassembly of the pipe. The high-temperature resistant hose 53 is flexible and temperature resistant, which facilitates wiring installation in the complex space above the tank and can withstand the high-temperature environment of the electrolytic cell. The bracket 54 plays a role in fixing and supporting, preventing the hose from deforming due to its own weight or external force, and ensuring the stability of the exhaust channel.

[0033] In a further preferred embodiment of the present invention, the multi-layer sealing mechanism 6 includes: a primary sealing layer 61 fixedly installed on one side of the material box cover 1 and the material box body 2, a reinforcing sealing layer 62 coated on the outer side of the primary sealing layer 61, and a sealing gasket 63 fixedly connected to the outer side of the reinforcing sealing layer 62.

[0034] In this embodiment, the primary sealing layer 61 is made of asbestos and fills the flange surface to form a basic seal. The reinforcing sealing layer 62 is made of high-temperature resistant glass glue, which can help the primary sealing layer 61 maintain its sealing performance at high temperatures, forming a composite sealing effect. Together with the sealing gasket 63, it can effectively seal the connection between the material box cover 1 and the material box body 2.

[0035] In a further preferred embodiment of the present invention, a return pipe 7 is connected to one side of the settling chamber 45, and the other end of the return pipe 7 is connected to the top of the material box cover 1.

[0036] In this embodiment, the use of the return pipe 7 can prevent dust from accumulating in the composite guide mechanism 4, reducing the difficulty of manual cleaning.

[0037] In summary, by directly conveying the dust collected in the settling chamber 45 to the inside of the return box through the return pipe 7, the dust is prevented from accumulating in the exhaust mechanism, effectively reducing the frequency of manual cleaning and effectively enabling the material to complete internal circulation and recycling.

[0038] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0039] It should be understood that the disclosed apparatus can be implemented in other ways, as illustrated in the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division of the leak-proof electrolytic cell tank. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be in the form of telecommunications or other means.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A leak-proof electrolytic cell material box, characterized in that, include: The hopper cover (1) and the hopper body (2); Vent groove (3) is formed on the top of the material box cover (1); The composite guide mechanism (4) is mounted on the top of the exhaust trough (3) and is used to separate dust from gas. An exhaust pipe assembly (5) is mounted on the upper part of the hopper cover (1), the exhaust pipe assembly (5) being used to directionally output gas to the outside; A multi-layer sealing mechanism (6) is provided between the mounting surfaces of the hopper cover (1) and the hopper body (2).

2. The leak-proof electrolytic cell material box as described in claim 1, characterized in that, The composite guide mechanism (4) includes: A converging tube (41) is fixedly installed on the top of the exhaust channel (3), the top of the converging tube (41) The throat (42) is connected to the top of the throat (42), and the diffuser (43) is connected to the top of the diffuser (43). A spiral guide plate (44) is fixed to the middle of the inner cavity of the diffuser (43). A settling cavity (45) is opened at the top of the diffuser (43). An inclined baffle (46) is fixed to the inner side of the settling cavity (45), and a through groove is opened in the center of the inclined baffle (46).

3. The leak-proof electrolytic cell material box as described in claim 2, characterized in that, The exhaust pipe assembly (5) includes: A threaded connector (51) is fixedly installed on the top of the diffuser tube (43). An extension interface (52) is threaded on the outer wall of the threaded connector (51). A high-temperature resistant hose (53) is connected to one side of the extension interface (52). A bracket (54) is slidably sleeved on the surface of the high-temperature resistant hose (53).

4. The leak-proof electrolytic cell material box as described in claim 2, characterized in that, One side of the settling chamber (45) is connected to a return pipe (7), and the other end of the return pipe (7) is connected to the top of the hopper cover (1).

5. The leak-proof electrolytic cell material box as described in claim 1, characterized in that: The multi-layer sealing mechanism (6) includes: A primary sealing layer (61) is fixedly installed on one side of the material box cover (1) and the material box body (2). A reinforcing sealing layer (62) is coated on the outside of the primary sealing layer (61). A sealing gasket (63) is fixed on the outside of the reinforcing sealing layer (62).

6. The leak-proof electrolytic cell material box as described in claim 1, characterized in that, The outer sides of the material box cover (1) and the material box body (2) are both fixed with flange interfaces (8), and the inner side of the flange interfaces (8) is provided with threaded grooves (9), and the inner side of the threaded grooves (9) is threaded with connecting screws (10).

7. The leak-proof electrolytic cell material box as described in claim 1, characterized in that, The top center of the material box cover (1) is connected to a constant volume discharge pipe (11), and the bottom of the material box body (2) is connected to a discharge pipe (12).

8. The leak-proof electrolytic cell tank as described in claim 2, characterized in that, The inner wall of the throat (42) is mirror polished.

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