A frame-detachable electrolytic cell flue gas collection hood structure

Abstract

The present invention discloses a frame-type detachable electrolytic cell fume collection hood structure, which is divided into several units. Each unit is first formed by a frame, on which a cover plate equipped with a sealing mechanism is laid. The width of each unit is the width of two anodes. Each unit includes: a bottom beam fixed to the cell wall of the electrolytic cell; two fixed beams, which are provided and located on both sides of the unit; the two ends of the fixed beam are respectively fixed to the bottom beam and the upper edge of the electrolytic cell; an intermediate baffle, the two ends of which are fixed to the fixed beam and parallel to the bottom beam; a detachable beam, one end of which is fixed to the bottom beam and the other end is fixed to the electrolytic cell bracket through a pin hole; the detachable beam is located between the two fixed beams and parallel to the two fixed beams. This structural form is simple to operate and has good sealing. This frame-type detachable electrolytic cell fume exhaust cover system is very easy to operate, reduces the labor load of workers, and ensures the airtightness of the fume exhaust system to the greatest extent.

Description

Technical Field

[0001] The invention relates to an electrolytic cell fume collecting cover, in particular to an electrolytic cell fume collecting cover structure with a detachable frame. Background Art

[0002] Aluminum electrolysis is a highly energy-intensive industry, and reducing energy costs is an inherent requirement for companies. During the production process, the electrolyte operates at temperatures of approximately 950°C to 970°C. During the production of elemental aluminum, harmful gases such as carbon dioxide and carbon tetrafluoride are generated. To maintain a healthy working environment in the workshop, the exhaust system of the electrolytic cells collects these gases into a flue gas treatment system. To prevent these gases from escaping into the workshop, the exhaust system maintains a high negative pressure. While extracting these gases, air from the workshop enters the exhaust system. If the exhaust system's gas collection cover has numerous or large gaps, a significant amount of air can be extracted, resulting in exhaust temperatures below 200°C and the removal of significant heat. This reduces the overall thermal efficiency of the electrolytic cell.

[0003] The existing fume collection hoods of the exhaust systems for aluminum electrolytic cells all use aluminum alloy covers that are laid flat on the top of the electrolytic cells. Since both sides of the cover are made of aluminum alloy profiles and are in double hard surface contact, there will be a gap between the two cover plates. Since operators often stand on the cover plates to operate, and replacing the anode may cause the residual anode to collide with the unremoved cover plates, over time, some cover plates may be deformed, resulting in larger gaps between the cover plates. If the deformed cover plates are not repaired in time, the gaps between the cover plates may become larger, which may disrupt the negative pressure balance in the exhaust system. In order to ensure that harmful gases in the electrolytic cell do not escape into the workshop, it is necessary to maintain the negative pressure value in the exhaust hood. As a result, the amount of flue gas will increase, resulting in energy waste. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a frame-detachable electrolytic cell fume collection hood structure, which has simple operation and good sealing between cover plates.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A frame-detachable electrolytic cell fume collection hood structure is divided into several units. Each unit is first composed of a frame, on which a cover plate equipped with a sealing mechanism is laid. The frame initially ensures the flatness of the entire fume collection system. The width of each unit is the width of two anodes. Each unit includes:

[0007] The bottom beam is fixed to the trough wall of the electrolytic cell to ensure sealing with the trough wall on the one hand and sealing between the cover plate and the bottom beam on the other hand. The fixing method can be fixed to the trough wall by pins or other methods. It should be easy to disassemble and maintain.

[0008] Two fixed beams are provided, located on both sides of the unit; the ends of the fixed beams are fixed to the bottom beam and the upper edge of the electrolytic cell respectively. During normal production, the fixed beams are not disassembled to ensure that their positions remain unchanged; the fixed beams should be located in the gap between the two anodes and should not affect the replacement of the anodes;

[0009] The middle barrier rod, whose two ends are fixed on the fixed beam and parallel to the bottom beam, is mainly used to support the cover plate. Its two ends are fixed on the fixed beam to ensure the structural stability of the system;

[0010] A removable beam, one end of which is fixed to the bottom beam, and the other end is fixed to the electrolytic cell support through a pin hole. A soft connection is provided on the contact surface between the removable beam and the support to ensure good sealing. The removable beam is located between the two fixed beams and is parallel to the two fixed beams.

[0011] The middle barrier bar, bottom beam, removable beam and two fixed beams enclose the two horizontal plate installation areas for corresponding installation of the two horizontal plates;

[0012] The middle barrier rod, the detachable beam, the two fixed beams and the two anode closed vertical plate installation areas are each installed with two vertical plates. The two vertical plates can be made of aluminum alloy with an internal insulation layer.

[0013] Furthermore, a slot is provided on the side where the bottom beam contacts the cell wall of the electrolytic cell for embedding ceramic fiber felt; a slot is also provided on the side where the bottom beam contacts the transverse plate for embedding ceramic fiber felt.

[0014] Furthermore, the fixing beam is provided with a groove for fixing the middle barrier rod; the fixing beam is provided with a positioning hole for fixing the position of the vertical plate and the horizontal plate.

[0015] Furthermore, a rubber pad is provided on the surface of the fixed beam that is assembled with the vertical plate and the horizontal plate.

[0016] Furthermore, the removable beam is provided with a positioning hole for fixing the position of the middle barrier rod, the vertical plate and the horizontal plate; the side of the removable beam assembled with the vertical plate and the horizontal plate is provided with a high-temperature resistant rubber pad or a high-temperature resistant fiber pad.

[0017] Furthermore, the vertical plate is made of aluminum alloy, and the bracket is an aluminum alloy profile with ceramic fiber cotton inside.

[0018] Furthermore, the edges of the vertical plates that are in contact with the horizontal plates or other vertical plates are sealed by retractable flexible connections.

[0019] Furthermore, the horizontal plate is made of stainless steel, the bracket is an aluminum alloy profile with ceramic fiber cotton inside, and a retractable flexible connection seal is used on the edge in contact with the vertical plate.

[0020] Furthermore, a foot pedal is provided on the upper surface of the horizontal plate to facilitate operation by staff.

[0021] Furthermore, the side and top of the cover plate are provided with heat-insulating telescopic sealing accessories; the telescopic parts on both sides of the cover plate are arc-shaped, and the outer edges of the telescopic parts are in the guide groove; the telescopic parts of two adjacent cover plates are connected in convex and concave manner, forming a labyrinth-like sealing effect in the local area;

[0022] The sealing accessories include a sealing head, a guide rod, a spring and a soft sealing material; the head of the sealing head has a groove, and the soft sealing material is arranged in the groove of the sealing head. The soft sealing material can withstand temperatures above 150°C. The sealing head is fixed in the middle by a guide rod and a spring, and moves back and forth along the guide rail.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The smoke exhaust system to which the present invention relates has an air collecting hood which is divided into several units. Each unit is composed of two anodes, two fixed beams, a bottom beam, an intermediate baffle, four vertical plates and two horizontal plates. This structural form is easy to operate and has good sealing. This frame-type detachable electrolytic cell smoke exhaust cover system is very easy to operate, reduces the labor load of workers, and ensures the airtightness of the smoke exhaust system to the greatest extent. The two side walls of these covers also have retractable arcs, a middle groove, a soft seal embedded in the middle of the groove, and a flexible sealing device. This ensures a fully sealed connection after the cover is moved into place. The retractable parts on both sides of the retractable cover are arc-shaped, which can be easily taken out, and can also ensure that the sealing effect is controlled by the spring system inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a detachable frame electrolytic cell fume collection hood structure provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the thermal insulation telescopic sealing accessories;

[0027] In the figure: 1. Anode; 2. Fixed beam; 3. Bottom beam; 4. Vertical plate; 5. Horizontal plate; 6. Removable beam; 7. Intermediate stop bar; 8. Sealing head; 9. Guide rod; 10. Spring; 11. Guide rail. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1:

[0030] See Figure 1 As shown, this embodiment provides a detachable frame-type electrolytic cell fume collection hood structure, which is divided into several units. Each unit is first constructed by a frame, on which a cover plate equipped with a sealing mechanism is laid. Each unit is composed of two anodes 1, two fixed beams 2, a bottom beam 3, an intermediate barrier 7, four vertical plates 4, and two horizontal plates 5. The two fixed beams are located adjacent to the two anodes. This structure is simple to operate and has a good seal.

[0031] Specifically, the bottom beam 3 is fixed to the cell walls of the electrolytic cell via pin holes, ensuring a seal with the cell walls and between the cover plate and the bottom beam. The fixing method can be pinned to the cell walls or other methods, with consideration given to ease of disassembly and maintenance. The bottom beam 3 is padded with a 10 mm thick ceramic fiber felt to strengthen the seal between the bottom beam and the cell. The top of the bottom beam 3 is also padded with a 10 mm thick ceramic fiber felt to ensure a seal between the bottom beam 3 and the cross plate 5. The 10 mm ceramic fiber felt is embedded in the slots of the bottom beam 3 and fixed within the cell. During production, the bottom beam 3 remains fixed to the cell walls and does not change with the replacement of anode blocks.

[0032] The fixed beam 2 is located on either side of the cell, with its ends fixed to the bottom beam 3 and the top edge of the electrolytic cell, respectively. During normal production, the fixed beam remains in place to ensure it remains in place. It should be positioned in the gap between the two anodes, ensuring it does not interfere with anode replacement. During anode replacement, it remains in place to ensure sufficient strength. It is only removed for maintenance or replacement when deformed by impact during anode replacement. Each cell is the width of two anodes 1. Removing the removable beam 6 in the center provides ample space for convenient anode replacement. The fixed beam 2 has a groove that secures the center bar 7 and creates a flat surface for the cover plate. The fixed beam 2 has positioning holes or slots that secure the relative position of the vertical plate 4 and horizontal plate 5. Once the relative position of the cover plates is determined, the elastic seals on the side walls of the cover plates can expand and contract within a certain range to ensure a seal. Furthermore, a heat-resistant rubber pad is installed on the top of the fixed beam 2 to strengthen the seal between the fixed beam 2 and the vertical and horizontal plates 4 and 5.

[0033] The intermediate bar 7 is primarily used to support the cover plate, with both ends fixed to the fixed beam 2 to ensure the structural stability of the system. The intermediate bar 7 is square and has positioning holes for fixing the position of the vertical plate 4 and the horizontal plate 5. In addition, a heat-resistant rubber pad is installed on the upper part of the intermediate bar 7 to strengthen the seal between the intermediate bar 7, the vertical plate 4, and the horizontal plate 5 during assembly.

[0034] One end of the removable beam 6 is fixed to the bottom beam 3, and the other end is fixed to the electrolytic cell support via a pin hole. The removable beam 6 needs to be removed when replacing the anode 1. The removable beam 6 supports the intermediate bar 7, vertical plates 4, and horizontal plates 5. The removable beam 6 has positioning holes for fixing the intermediate bar 7, vertical plates 4, and horizontal plates 5. In addition, the removable beam 6 is equipped with a heat-resistant rubber pad on the top to strengthen the seal between the removable beam 6 and the vertical plates 4 and horizontal plates 5 during assembly.

[0035] The intermediate barrier bar 7, bottom beam 3, removable beam 6, and two fixed beams 2 enclose the two horizontal plate installation areas for corresponding installation of the two horizontal plates 5. In other words, each unit has two horizontal plates 5, and the horizontal plates 5 are surrounded by the bottom beam 3, fixed beam 2, vertical plates 4, and horizontal plates 5. The plate material of the horizontal plate 5 is made of stainless steel such as 201 or 304, which is resistant to high temperatures and has better thermal insulation effect; the bracket is an aluminum alloy profile with 10mm ceramic fiber cotton inside. The edge in contact with the vertical plate adopts a retractable flexible connection seal, and a foot lever is set on the upper surface of the horizontal plate 5 for the operator to assemble or remove the vertical plate.

[0036] The intermediate barrier bar 7, removable beam 6, two fixed beams 2, and two anodes 1 enclose two vertical plate mounting areas. Two vertical plates 4 are installed in each vertical plate mounting area; that is, each unit has four vertical plates 4, surrounded by fixed beams 2, vertical plates 4, and horizontal plates 5. The vertical plates 4 are made of aluminum alloy, with brackets made of aluminum alloy profiles and filled with 10mm ceramic fiber wool. The edges that contact the horizontal plates or other vertical plates are sealed with retractable flexible connections.

[0037] In addition, the sides and top of the cover are equipped with heat-insulating telescopic sealing parts, and the telescopic parts on both sides of the telescopic cover are arc-shaped. These materials are all aluminum alloy, which ensures strength while being light in weight. Figure 2 As shown, the sealing accessories are composed of four parts. The first is the sealing head 8 with a groove on the head. On the one hand, it is fixed in the middle by the guide rod 9 and the spring 10 and can move forward and backward along the guide rail 11. When the sealing head 8 moves forward and backward along the guide rod, if there is no restriction of the guide rail, the sealing head 8 will swing left and right. The second part is the guide rail 11, which allows the sealing head 8 to move forward and backward. The guide rod 9 is used to fix the spring 10 and the sealing head 8. The spring 10 allows the sealing head 8 to always maintain good sealing performance. In the groove of the sealing head 8, a soft sealing material is arranged. The material can withstand temperatures above 150°C. This part of the seal is Figure 1 The part of the frame in the middle is the seal made on the frame. This semicircular retractable block moves back and forth. The outer edge of the retractable part is in the guide groove to ensure that the retractable part moves within a certain range. The retractable range is about 10mm. The retractable parts of the adjacent two cover plates are connected in convex and concave, forming a maze-like sealing effect in the local area, such as Figure 2As shown, when the two cover plates are placed, the spring 10 of the sealing head 8 will be properly compressed, and the front end is a soft seal. Since the sealing head is a circular arc, it is convenient to move or place the cover plate. At the same time, the cover plate can be easily removed or assembled, and the sealing effect can also be controlled by the spring system inside. 10mm ceramic fiber cotton is added in the middle of the cover plate, compressed to 5mm and then fixed. In this way, by adopting Figure 2 The sealing structure can achieve a sealed connection between two different cover plates.

[0038] In addition, the upper and lower edge sealing system of the cover adopts a flexible connection method to ensure the sealing effect; the system is convenient for taking out and taking in, and a handle is set on the cover to easily take out or put in the cover, ensuring easy operation.

[0039] This frame-type, removable electrolytic cell fume exhaust cover system is exceptionally easy to operate, reducing worker workload and ensuring the exhaust system's tightness to the greatest extent possible. These covers also feature a retractable arc shape, a central groove, and a soft seal embedded in the groove, a flexible sealing mechanism. This ensures a fully sealed connection once the cover is in place. The retractable covers on both sides feature arc-shaped sections, allowing for easy removal and ensuring a secure seal, controlled by an internal spring system.

[0040] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the essence of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A frame-detachable electrolytic cell fume collection hood structure, characterized in that: The electrolytic cell fume collection hood structure is divided into several units. Each unit is first formed by a frame, on which a cover plate equipped with a sealing mechanism is laid. The width of each unit is the width of two anodes. Each unit includes: A bottom beam, which is fixed to the cell wall of the electrolytic cell and is sealed to the cell wall and the cover plate; There are two fixed beams, located on both sides of the unit; the ends of the fixed beams are fixed to the bottom beam and the upper edge of the electrolytic cell respectively. During normal production, the fixed beams are not disassembled to ensure that the relative positions of the various cover plates of the smoke exhaust system remain unchanged. The fixed beams should be located in the gap between the two anodes and should not affect the replacement of the anodes; An intermediate barrier rod, both ends of which are fixed on the fixed beam and parallel to the bottom beam, is used to support the cover plate and is detachable; A removable beam, one end of which is fixed to the bottom beam, and the other end is fixed to the electrolytic cell support through a pin hole. A soft connection is provided on the contact surface between the removable beam and the electrolytic cell support to ensure a good seal. The removable beam is located between the two fixed beams and is parallel to the two fixed beams. The middle barrier bar, bottom beam, removable beam and two fixed beams enclose the two horizontal plate installation areas for corresponding installation of the two horizontal plates; The intermediate barrier bar, the removable beam, the two fixed beams and the two anode closed-shaped two-riser mounting area, each of which is equipped with two risers; The sides and top of the cover plate are provided with heat-insulating telescopic sealing fittings; the telescopic parts on both sides of the cover plate are arc-shaped, and the outer edges of the telescopic parts are in the guide groove; the telescopic parts of two adjacent cover plates are connected in convex and concave ways, forming a labyrinth-like sealing effect in the local area; The sealing accessories include a sealing head, a guide rod, a spring and a soft sealing material; the head of the sealing head has a groove, and the soft sealing material is arranged in the groove of the sealing head. The soft sealing material can withstand temperatures above 150°C. The sealing head is fixed in the middle by a guide rod and a spring, and moves back and forth along the guide rail.

2. The frame-detachable electrolytic cell fume collection cover structure according to claim 1, characterized in that: A slot is provided on the side where the bottom beam contacts the cell wall of the electrolytic cell for embedding ceramic fiber felt; a slot is also provided on the side where the bottom beam contacts the cross plate for embedding ceramic fiber felt. The ceramic fiber felt has a fixing mechanism to prevent it from falling off during operation.

3. The frame-detachable electrolytic cell fume collection cover structure according to claim 1, characterized in that: The fixing beam is provided with a groove for fixing the middle blocking rod and forming a flat surface for placing the cover plate; the fixing beam is provided with a positioning hole or a slot for fixing the relative position of the vertical plate and the horizontal plate.

4. The frame-detachable electrolytic cell fume collection cover structure according to claim 1 or 3, characterized in that: A high-temperature resistant rubber pad or a high-temperature resistant fiber pad is provided on the surface of the fixed beam that is assembled with the vertical plate and the horizontal plate.

5. The frame-detachable electrolytic cell fume collection cover structure according to claim 1, characterized in that: The detachable beam is provided with a positioning hole for fixing the positions of the middle barrier rod, the vertical plate and the horizontal plate; the side of the detachable beam assembled with the vertical plate and the horizontal plate is provided with a high-temperature resistant rubber pad or a high-temperature resistant fiber pad.

6. The frame-detachable electrolytic cell fume collection cover structure according to claim 1, characterized in that: The vertical plate is made of aluminum alloy, the bracket is an aluminum alloy profile, and ceramic fiber cotton is inside the profile and the vertical cover plate.

7. The frame-detachable electrolytic cell fume collection cover structure according to claim 1 or 6, characterized in that: The edges of the vertical plates that are in contact with the horizontal plates or other vertical plates are connected and sealed with retractable, flexible, and high-temperature-resistant connections.

8. The frame-detachable electrolytic cell fume collection cover structure according to claim 1, characterized in that: The horizontal plate is made of stainless steel, the bracket is an aluminum alloy profile, ceramic fiber cotton is inside the profile and the horizontal cover plate, and a retractable, flexible, high-temperature resistant connection seal is used on the edge in contact with the vertical plate.

9. The frame-detachable electrolytic cell fume collection cover structure according to claim 1 or 8, characterized in that: A pedal rod is provided on the upper surface of the transverse plate.

Images