Electrolytic tank material box exhaust structure

Abstract

The utility model discloses an electrolytic bath work bin exhaust structure which comprises an electrolytic bath work bin and an exhaust pipeline, the exhaust pipeline is arranged at the top of the electrolytic bath work bin, a vertically upward and detachable sintering net filter element is installed at the top of the exhaust pipeline, and the sintering net filter element is fixed at the top of the exhaust pipeline through an assembly ring and a bolt. A filter cavity is formed in the sintered net filter element, a pressure relief hole is formed in the top of the sintered net filter element, and an inner sleeve filter element is arranged in the sintered net filter element and annularly distributed on the periphery of the pressure relief hole. According to the exhaust structure of the electrolytic tank material box, the exhaust mode of the electrolytic tank material box is modified, the original exhaust hole is blocked, the exhaust pipeline and the sintering net filter element are additionally arranged on the blind plate at the top end of the electrolytic tank material box, and the pressure relief hole is formed in the sintering net filter element, so that the defects of the exhaust structure of the electrolytic tank material box in the prior art are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of an electrolytic cell. Background Art

[0002] Due to the design defects of the electrolytic cell shell, during the process of super-dense phase feeding to the upper material box of the cell, the exhaust pipe in the material box was originally designed to discharge the gas into the interior of the cell body, which caused the following main impacts:

[0003] ① High-pressure air with a large amount of alumina is ejected from the exhaust hole (the material injection time is 3 times / shift, 30min-60min / time), resulting in material waste and excessive alumina unit consumption;

[0004] ② High-pressure air with a large amount of aluminum oxide is ejected from the exhaust hole, causing the anode steel claws in the tank to bury. The buried claws lead to the increase in the temperature of the weld between the steel claws and the guide rods, and the phenomenon of residual pole breaking occurs frequently, increasing the risk of pole replacement operations and the cost of steel claw repair;

[0005] ③ High-pressure wind with a large amount of aluminum oxide sprayed out from the exhaust hole caused claws to be buried, causing workers to frequently dig materials and increase the workload;

[0006] ④ High-pressure air with a large amount of alumina is ejected from the exhaust hole, causing a lot of material accumulation in the middle seam, resulting in high local temperature in the tank, odd shape of the furnace, large voltage swing, and increased power consumption;

[0007] ⑤ Large losses due to flying alumina and poor on-site working environment. Utility Model Content

[0008] The purpose of the utility model is to provide an electrolytic tank material box exhaust structure to solve the problems raised in the above background technology.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An electrolytic cell material box exhaust structure comprises an electrolytic cell material box and an exhaust pipeline, wherein the exhaust pipeline is arranged at the top of the electrolytic cell material box, a vertically upward and detachable sintered mesh filter element is installed on the top of the exhaust pipeline, the sintered mesh filter element is fixed to the top of the exhaust pipeline by an assembly ring and bolts, a filter cavity is opened inside the sintered mesh filter element, and a pressure relief hole is arranged on the top of the sintered mesh filter element.

[0011] As a further solution of the utility model: an inner sleeve filter element is arranged inside the sintered mesh filter element, and the inner sleeve filter element is distributed in a ring shape on the periphery of the pressure relief hole.

[0012] As a further solution of the utility model: a spring-type one-way valve is arranged on the top of the pressure relief hole, and when the internal pressure of the sintered mesh filter element increases, the internal spring of the spring-type one-way valve is pushed to contract and release the air pressure.

[0013] As a further solution of the utility model: a venturi tube section is installed inside the exhaust pipeline;

[0014] The Venturi tube section includes an inlet section, a contraction section and a diffusion receiving section. The inlet section runs from the outside to the inside of the exhaust pipeline, and the output end of the inlet section is connected to the contraction section. The diffusion receiving section runs from the outside to the inside of the exhaust pipeline, and the output end of the contraction section corresponds to the position input end of the diffusion receiving section. The airflow ejected from the contraction section enters the input end of the diffusion receiving section.

[0015] As a further solution of the utility model: the tube diameter of the inlet section is larger than the tube diameter of the contraction section. After the airflow enters the contraction section, it is compressed, the flow rate is accelerated, and it is sprayed into the diffusion receiving section. The tube diameter of the diffusion receiving section is larger than the tube diameter of the contraction section.

[0016] As a further solution of the utility model: a butterfly valve located below the Venturi tube section is arranged inside the exhaust pipeline, and a driving motor for driving the butterfly valve to open and close is installed on the exhaust pipeline.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The exhaust structure of the electrolytic cell material box is improved by modifying the exhaust method of the electrolytic cell material box, blocking the original exhaust hole, adding an exhaust pipeline and a sintered mesh filter element to the blind plate at the top of the electrolytic cell material box, and opening a pressure relief hole on the sintered mesh filter element to solve the defects of the exhaust structure of the electrolytic cell material box in the prior art.

[0019] 2. The exhaust structure of the electrolytic cell material box cleans the alumina in the sintered mesh filter element through the combination of the Venturi tube section and the exhaust pipeline, and blows it out by air delivery for unified recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an electrolytic cell material box exhaust structure;

[0021] Figure 2 It is a structural front view of an exhaust pipeline in an electrolytic cell material box exhaust structure;

[0022] Figure 3 The present invention is a structural stereogram of an exhaust pipeline in an electrolytic cell material box exhaust structure.

[0023] In the figure: 1. Electrolyzer material box; 2. Exhaust pipeline; 3. Sintered mesh filter element; 4. Spring-loaded one-way valve; 5. Inlet section; 6. Diffusion receiving section; 7. Drive motor; 8. Assembly ring; 9. Drive butterfly valve; 10. Contraction section; 11. Inner filter element; 12. Filter chamber. DETAILED DESCRIPTION

[0024] See also Figures 1 to 3In the embodiment of the utility model, an electrolytic cell material box exhaust structure comprises an electrolytic cell material box 1 and an exhaust pipeline 2, the exhaust pipeline 2 is arranged at the top of the electrolytic cell material box 1, a sintered mesh filter element 3 which is vertically upward and detachable is installed on the top of the exhaust pipeline 2, the sintered mesh filter element 3 is fixed to the top of the exhaust pipeline 2 by an assembly ring 8 and bolts, a filter chamber 12 is provided inside the sintered mesh filter element 3, a pressure relief hole is provided on the top of the sintered mesh filter element 3, a special person is specially assigned to conduct special inspections on all electrolytic cells at the upper part of the electrolytic cell, and the points where the material spraying is serious are recorded, and a technical reform is implemented on the exhaust mode of the electrolytic cell material box 1: the first improvement is to block the original exhaust hole, remove the blind plate at the top of the electrolytic cell material box 1 on the tank, install a boiling cloth or cloth bag of 0.5 cm, and abandon the downward exhaust and change it to upward exhaust; but due to the poor air permeability of the boiling cloth or cloth bag and the poor exhaust effect, long-term operation will cause the boiling cloth and cloth bag holes to be densely packed, and timely cleaning is required to ensure the normal feeding of the material box, and The bag is soft, and long-term use will cause a large amount of aluminum oxide to gush out from the gap of the bag, resulting in serious material accumulation on the upper part of the tank; the exhaust is not smooth, resulting in a shortage of materials in most tanks, and the tank effect coefficient remains high. In view of the unsatisfactory technical transformation of the bag, combined with the experience accumulated in the early stage, secondary improvements were made after research, and the bag was replaced with a sintered mesh filter element 3, and the on-site material filling and exhaust effect was tracked from time to time; after long-term tracking and inspection, the internal exhaust of the electrolytic cell material box 1 was smooth and could be filled as planned, so the sintered mesh filter element 3 was installed on a large scale. In order to ensure normal exhaust, a pressure relief hole was added to the sintered mesh filter element 3, and the on-site improvement effect was obvious. Through this transformation of the electrolytic cell material box 1, the phenomenon of the exhaust hole of the electrolytic cell material box 1 spraying material into the tank was effectively controlled, and the accumulation of material at the welding position of the steel claw and the guide rod caused the temperature to rise and cause the rod to break, which can ensure that the electrolytic cell material box 1 is filled as planned, and prevent the sudden effect caused by the shortage of material in the electrolytic cell material box 1, and greatly reduce the effect coefficient;

[0025]

[0026] The phenomenon of buried claws of residual poles was effectively controlled, the workload of operators in digging materials was reduced, the accumulation of materials on the top of the tank and the spraying of materials in the tank were greatly reduced, and the cost of producing alumina materials was saved. After this technical transformation and the installation of sintered mesh filter elements, the on-site environment was significantly improved, which greatly improved the on-site visualization construction.

[0027] In a preferred embodiment, an inner filter element 11 is arranged inside the sintered mesh filter element 3. The inner filter element 11 is distributed in a ring shape on the periphery of the pressure relief hole. The inner filter element 11 is recessed inward, and the filtering area of ​​the inner filter element 11 is increased on the area of ​​the sintered mesh filter element 3, so that the filtering effect is improved, and the filtering efficiency exceeds the exhaust speed, thereby preventing the high pressure in the electrolytic cell material box 1 from being unable to be discharged or being discharged too much from the pressure relief hole.

[0028] In a preferred embodiment, a spring-loaded one-way valve 4 is provided on the top of the pressure relief hole. When the internal pressure of the sintered mesh filter element 3 increases, the internal spring of the spring-loaded one-way valve 4 is pushed to contract and release the air pressure. The spring-loaded one-way valve 4 is a prior art, and the internal spring pushes the ball to seal the air flow channel. The present application reverses the spring-loaded one-way valve 4. When the air pressure is low and the ball that seals the air flow channel cannot be pushed, the spring-loaded one-way valve 4 is in a sealed state. When the air pressure rises, the air pressure pushes the ball to compress the spring to open the air flow channel and release the air pressure. This can maximize the guarantee that the exhaust gas is filtered through the sintered mesh filter element 3 and reduce the amount of iron oxide discharged from the pressure relief hole.

[0029] In a preferred embodiment, a Venturi tube section is installed inside the exhaust line 2;

[0030] The venturi tube section includes an inlet section 5, a contraction section 10 and a diffusion receiving section 6. The inlet section 5 penetrates from the outside to the inside of the exhaust pipeline 2. The output end of the inlet section 5 is connected to the contraction section 10. The diffusion receiving section 6 penetrates from the outside to the inside of the exhaust pipeline 2. The output end of the contraction section 10 corresponds to the position input end of the diffusion receiving section 6. The airflow ejected from the contraction section 10 enters the input end of the diffusion receiving section 6. The venturi tube section is matched with the exhaust pipeline 2. A supercharger is arranged at the input end of the inlet section 5 of the venturi tube section, and is oxidized in the sintered mesh filter element 3. Aluminum accumulation, positive pressure airflow passes through the inlet section 5, the tube diameter of the inlet section 5 is larger than the tube diameter of the contraction section 10, the airflow is compressed after entering the contraction section 10, the flow rate is accelerated, and it is sprayed into the diffusion receiving section 6, the tube diameter of the diffusion receiving section 6 is larger than the tube diameter of the contraction section 10. When the fluid passes through a narrow channel, the flow rate will suddenly increase due to the obstruction of the fluid, and a vacuum area will be formed at the outlet, thereby attracting the surrounding air or other fluids. The vacuum generated can attract the alumina inside the sintered mesh filter element 3, thereby cleaning the alumina.

[0031] In a preferred embodiment, a butterfly valve 9 located below the Venturi tube section is provided inside the exhaust pipeline 2, and a driving motor 7 for driving the butterfly valve 9 to open and close is installed on the exhaust pipeline 2. The negative pressure capacity generated by the Venturi tube section is limited, and the exhaust pipeline 2 is blocked by driving the butterfly valve 9. The negative pressure is sucked into the alumina in the sintered mesh filter element 3, and the diffusion receiving section 6 can be connected to an alumina recovery pipeline to recover the alumina in the diffusion receiving section 6 by air conveying.

[0032] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0033] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An electrolytic cell material box exhaust structure, comprising an electrolytic cell material box (1) and an exhaust pipeline (2), wherein the exhaust pipeline (2) is arranged on the top of the electrolytic cell material box (1), characterized in that: A detachable sintered mesh filter element (3) is installed vertically upward on the top of the exhaust pipeline (2); the sintered mesh filter element (3) is fixed to the top of the exhaust pipeline (2) by means of an assembly ring (8) and bolts; a filter cavity (12) is provided inside the sintered mesh filter element (3); and a pressure relief hole is provided on the top of the sintered mesh filter element (3); A venturi tube section is installed inside the exhaust pipeline (2); The venturi tube section comprises an inlet section (5), a contraction section (10) and a diffusion receiving section (6), wherein the inlet section (5) penetrates from the outside to the inside of the exhaust pipeline (2), the output end of the inlet section (5) is connected to the contraction section (10), the diffusion receiving section (6) penetrates from the outside to the inside of the exhaust pipeline (2), the output end of the contraction section (10) corresponds to the position input end of the diffusion receiving section (6), and the airflow ejected from the contraction section (10) enters the input end of the diffusion receiving section (6).

2. The electrolytic cell material box exhaust structure according to claim 1, characterized in that: An inner filter element (11) is arranged inside the sintered mesh filter element (3), and the inner filter element (11) is distributed in an annular shape on the periphery of the pressure relief hole.

3. The electrolytic cell material box exhaust structure according to claim 1, characterized in that: A spring-loaded one-way valve (4) is arranged at the top of the pressure relief hole, and when the internal pressure of the sintered mesh filter element (3) increases, the internal spring of the spring-loaded one-way valve (4) is pushed to contract and release the air pressure.

4. The electrolytic cell material box exhaust structure according to claim 1, characterized in that: The diameter of the inlet section (5) is larger than the diameter of the contraction section (10). After the airflow enters the contraction section (10), it is compressed, the flow rate is accelerated, and it is ejected into the diffusion receiving section (6). The diameter of the diffusion receiving section (6) is larger than the diameter of the contraction section (10).

5. The electrolytic cell material box exhaust structure according to claim 1, characterized in that: A butterfly valve (9) located below the Venturi tube section is arranged inside the exhaust pipeline (2), and a drive motor (7) for driving the butterfly valve (9) to open and close is installed on the exhaust pipeline (2).

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