A fluorine-containing aluminum oxide carrying apparatus

Abstract

This utility model discloses a fluorinated alumina screening device, relating to the technical field of fluorinated alumina. It includes a hopper plate arranged inclined along the inflow direction of the fluorinated alumina, with a flow-blocking plate and a flow-diverting plate sequentially arranged on the hopper plate along the inflow direction. The fluorinated alumina is screened using baffles on the hopper plate. Fluorinated alumina that has clumped into blocks or flakes is blocked and filtered out by the baffles, while fluorinated alumina that has not yet clumped into blocks or flakes passes through the baffles and enters the hopper. This allows the fluorinated alumina that has not yet clumped into blocks or flakes to re-enter the system and react with the fluorinated flue gas, increasing the fluorine content of the fluorinated alumina. This allows the fluorinated alumina that has not yet clumped into blocks or flakes to enter the secondary circulation pipe independently, avoiding the blockage of the secondary circulation pipe by fluorinated alumina that has clumped into blocks or flakes. This solves the existing technical problem that fluorinated alumina that has not yet clumped into blocks or flakes cannot enter the secondary circulation pipe independently.

Description

Technical Field

[0001] This utility model relates to the technical field of fluorinated alumina, and in particular to a fluorinated alumina screening device. Background Technology

[0002] In the production of electrolytic aluminum, electrolytes (such as cryolite, aluminum fluoride, etc.) are added to the electrolytic cell to lower the melting point of the electrolyte, improve its conductivity, and reduce energy consumption during the electrolysis process. This process generates hydrogen fluoride-containing waste gas, which is a highly corrosive gas that damages the atmosphere, water bodies, soil, and human health. However, through advanced recycling technologies and resource utilization methods, the emission of fluoride can be effectively reduced, while achieving efficient resource utilization.

[0003] The current mainstream technology utilizes the physical adsorption properties of fresh alumina to react with fluorine-containing flue gas in electrolytic flue gas purification systems, thereby achieving fluorine recovery. These systems typically employ low-pressure reverse-flushing bag filters. The process involves allowing alumina to fully react with the fluorine-containing flue gas within the filter, increasing the circulation rate of alumina and enhancing the fluorine content of the fluorinated alumina, thus achieving efficient fluorine recovery.

[0004] However, in actual production, it was found that during the operation of the dust collector, the fluidity of alumina after adsorbing hydrogen fluoride and becoming fluorinated alumina deteriorates. Some of the fluorinated alumina clumps into blocks or flakes, while the remaining alumina adsorbs hydrogen fluoride but does not clump. The fluorinated alumina that does not clump can be recycled into the electrolytic flue gas purification system to react with the fluorine-containing flue gas, increasing the fluorine content of the fluorinated alumina and facilitating efficient fluorine recovery. On the other hand, the fluorinated alumina plates that clump into blocks or flakes are prone to clogging the secondary circulation pipes during the secondary circulation process, affecting the normal operation of the secondary circulation.

[0005] Therefore, how to distinguish between fluorinated alumina that is condensed into blocks or sheets and fluorinated alumina that is not condensed into blocks or sheets, so that the fluorinated alumina that is not condensed into blocks or sheets can enter the secondary cycle separately and improve the fluorine content of fluorinated alumina, is a technical problem that needs to be solved. Utility Model Content

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes a fluorinated alumina screening device, which solves the technical problem that existing fluorinated alumina that has not clumped into blocks or flakes cannot be individually recycled.

[0007] The technical solution of this utility model is implemented as follows: a fluorinated alumina screening device includes a hopper plate arranged inclined along the flow direction of the fluorinated alumina, a flow-blocking plate and a flow-diverting plate arranged sequentially on the hopper plate along the flow direction of the fluorinated alumina, a baffle for screening the fluorinated alumina is provided at the outlet of the flow-diverting plate, and a hopper for collecting fluorinated alumina that has not clumped into blocks or flakes is provided at the bottom of the hopper plate, and the hopper is located below the baffle. This application utilizes baffles installed on the hopper plate to screen fluorinated alumina. Fluorinated alumina that has clumped into blocks or flakes is blocked and filtered out by the baffles, while fluorinated alumina that has not yet clumped into blocks or flakes passes through the baffles and enters the hopper. This allows the fluorinated alumina that has not yet clumped into blocks or flakes to re-enter the system and react with the fluorinated flue gas, increasing the fluorine content of the fluorinated alumina. By using baffles to screen the fluorinated alumina that has clumped into blocks or flakes, the fluorinated alumina that has not clumped into blocks or flakes can enter the secondary circulation pipe separately, avoiding the blockage of the secondary circulation pipe by the fluorinated alumina that has clumped into blocks or flakes. This solves the existing technical problem that fluorinated alumina that has not clumped into blocks or flakes cannot enter the secondary circulation pipe separately.

[0008] The baffle plate is designed to reduce the flow velocity of the fluorinated alumina falling along the hopper plate, which helps to ensure the screening effect of the fluorinated alumina.

[0009] The diversion plate is designed to distribute the fluorinated alumina from a single inlet on the hopper to multiple outlet paths, ensuring uniform or on-demand distribution of the fluorinated alumina.

[0010] Preferably, the baffle is fixedly connected to the hopper plate, and the connection between the baffle and the hopper plate is provided with strip-shaped holes for screening out fluorinated alumina that has agglomerated into blocks or flakes; a plurality of such strip-shaped holes are arranged sequentially along the inclined direction of the baffle. The strip-shaped holes are designed to screen the fluorinated alumina. When the fluorinated alumina that has agglomerated into blocks or flakes and the fluorinated alumina that has not agglomerated fall together along the hopper plate, the size of the fluorinated alumina that has agglomerated into blocks or flakes is larger than the size of the strip-shaped holes, while the size of the fluorinated alumina that has not agglomerated is smaller than the size of the strip-shaped holes. The fluorinated alumina that has not agglomerated can continue to fall through the strip-shaped holes, while the fluorinated alumina that has agglomerated into blocks or flakes cannot pass through the strip-shaped holes and is blocked by the baffle, thereby achieving the screening of the fluorinated alumina. The sequential arrangement of a plurality of such strip-shaped holes along the inclined direction of the baffle is to ensure the screening effect and to facilitate the passage of the fluorinated alumina that has not agglomerated through the strip-shaped holes.

[0011] Preferably, the angle of inclination of the bucket plate is 40°~50°. Setting the angle of inclination to 40°~50° facilitates the flow of both fluorinated alumina that has clumped into blocks or sheets and unclumped fluorinated alumina from the bucket plate. Preferably, the angle of inclination is 45° because, compared to a 40° angle, a 45° angle provides a steeper slope, making it easier for both fluorinated alumina that has clumped into blocks or sheets and unclumped fluorinated alumina to fall, thus reducing the likelihood of fluorinated alumina clumps or sheets accumulating on the bucket plate 2.

[0012] Preferably, the baffle is inclinedly disposed on the hopper plate. The baffle is inclined so that one end is at a higher position and the other end is at a lower position, allowing the fluorinated alumina that has been blocked and filtered out and is clumped into blocks or flakes to be discharged along the inclined direction of the baffle. The inclined baffle facilitates the discharge of the clumped or flake-like fluorinated alumina, avoids baffle blockage, and helps ensure the screening of the fluorinated alumina.

[0013] Preferably, the baffle 7 is tilted at an angle of 10° to 15°. The tilt angle of 10° to 15° facilitates the flow of fluorinated alumina, which has clumped into blocks or sheets, down the inclined baffle. The preferred tilt angle is 15° because, compared to a 10° tilt angle, a 15° angle provides a steeper slope, making it easier for the fluorinated alumina to fall and reducing the likelihood of it accumulating on the baffle.

[0014] Preferably, at least two of the flow-blocking plates are arranged along the inflow direction of the fluorinated alumina. The purpose of providing at least two flow-blocking plates is to impede and slow down the flow at least twice on the hopper plate, which is beneficial for the thorough screening of the fluorinated alumina.

[0015] Preferably, the bucket plate is provided with at least three diversion plates, which are arranged in parallel, and a diversion channel is formed between two adjacent diversion plates. The purpose of providing at least three diversion plates is to form at least three outlet paths on the device of this application, ensuring uniform or on-demand distribution of the fluorinated alumina.

[0016] Preferably, the hopper is equipped with an arc plate. The arc plate is designed to catch the fluorinated aluminum oxide that passes through the baffle and falls, thereby reducing the impact force of the falling fluorinated aluminum oxide.

[0017] Preferably, the top of the arc plate is connected to the diverter plate. Connecting the top of the arc plate to the diverter plate is for further securing the diverter plate; that is, the arc plate supports the diverter plate, which is merely placed on the bucket plate, and the diverter plate is not directly fixed to the bucket plate.

[0018] Preferably, the bottom of the hopper is provided with a venting plate, and the bottom of the venting plate is connected to an air chamber. The venting plate and the air chamber are designed to allow the un-caked fluorinated alumina entering the hopper to flow freely, so that the un-caked fluorinated alumina can re-enter the secondary circulation pipe.

[0019] The beneficial effects of this utility model are:

[0020] This application utilizes baffles installed on the hopper plate to screen fluorinated alumina. Fluorinated alumina that has clumped into blocks or flakes is blocked and filtered out by the baffles, while fluorinated alumina that has not yet clumped into blocks or flakes passes through the baffles and enters the hopper. This allows the fluorinated alumina that has not yet clumped into blocks or flakes to re-enter the system and react with the fluorinated flue gas, thereby increasing the fluorine content of the fluorinated alumina. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the present invention.

[0023] Figure 2 This is the front view of the present invention.

[0024] Figure 3 This is a side view of the present invention.

[0025] Figure 4 This is a schematic diagram showing the connection between the baffle and the bucket plate of this utility model.

[0026] Figure 5 for Figure 4 Enlarged schematic diagram of the connection between the middle baffle and the bucket plate.

[0027] In the diagram, 1 is the hopper, 2 is the hopper plate, 3 is the air chamber, 4 is the flow divider, 5 is the arc plate, 6 is the flow baffle, 7 is the baffle, and 8 is the strip hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: A fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a hopper plate 2 arranged at an inclination along the flow direction of the fluorinated alumina. A flow-blocking plate 6 and a flow-diverting plate 4 are sequentially arranged on the hopper plate 2 along the flow direction of the fluorinated alumina. A baffle 7 for screening the fluorinated alumina is provided at the outlet of the flow-diverting plate 4. A hopper 1 for collecting fluorinated alumina that has not clumped into blocks or flakes is provided at the bottom of the hopper plate 2. The hopper 1 is located below the baffle 7. This application utilizes baffles 7 installed on the hopper plate 2 to screen fluorinated alumina. Fluorinated alumina that has clumped into blocks or flakes is blocked and filtered out by the baffles 7, while fluorinated alumina that has not yet clumped into blocks or flakes passes through the baffles 7 and enters the hopper 1. This allows the fluorinated alumina that has not yet clumped into blocks or flakes to re-enter the system and react with the fluorinated flue gas, thereby increasing the fluorine content of the fluorinated alumina. By using the baffles to screen the fluorinated alumina that has clumped into blocks or flakes, the fluorinated alumina that has not clumped into blocks or flakes can enter the secondary circulation pipe separately, avoiding the situation where the fluorinated alumina that has clumped into blocks or flakes blocks the secondary circulation pipe. This solves the existing technical problem that fluorinated alumina that has not clumped into blocks or flakes cannot enter the secondary circulation pipe separately.

[0030] The baffle plate 6 is designed to reduce the flow rate of the fluorinated alumina falling along the bucket plate 2, which helps to ensure the screening effect of the fluorinated alumina.

[0031] The purpose of the diversion plate 4 is to distribute the fluorinated alumina from a single inlet on the bucket plate 2 to multiple outlet paths, ensuring uniform or on-demand distribution of the fluorinated alumina.

[0032] Example 2, based on Example 1, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the baffle 7 is fixedly connected to the bucket plate 2. A strip-shaped hole 8 is provided at the connection between the baffle 7 and the bucket plate 2 for screening out fluorinated alumina that has agglomerated into blocks or flakes. Several of these strip-shaped holes 8 are arranged sequentially along the inclined direction of the baffle 7. The strip-shaped holes 8 are designed to screen the fluorinated alumina. When fluorinated alumina agglomerated into blocks or flakes and un-agglomerated fluorinated alumina fall together along the bucket plate 2, the size of the alumininated alumina agglomerated into blocks or flakes is larger than the strip-shaped hole 8, while the size of the un-agglomerated fluorinated alumina is smaller than the strip-shaped hole 8. The un-agglomerated fluorinated alumina can continue to fall through the strip-shaped hole 8, while the alumininated alumina agglomerated into blocks or flakes cannot pass through the strip-shaped hole 8 and is blocked by the baffle 7, thus achieving the screening of the fluorinated alumina. The sequential arrangement of several of these strip-shaped holes 8 along the inclined direction of the baffle 7 ensures the screening effect and facilitates the passage of un-agglomerated fluorinated alumina through the strip-shaped holes 8.

[0033] Example 3, based on Example 2, provides a fluorine-loaded alumina screening device, such as... Figure 1 and Figure 3 As shown, the angle of inclination of the bucket plate 2 is 40°~50°. Setting the angle of inclination of the bucket plate 2 to 40°~50° facilitates the flow of both fluorinated alumina that has clumped into blocks or sheets and unclumped fluorinated alumina from the bucket plate 2. Preferably, the angle of inclination of the bucket plate 2 is 45°, because compared to a 40° angle, a 45° angle provides a steeper slope, making it easier for both fluorinated alumina that has clumped into blocks or sheets and unclumped fluorinated alumina to fall, thus reducing the accumulation of fluorinated alumina that has clumped into blocks or sheets on the bucket plate 2.

[0034] Example 4, based on Example 3, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 4 and Figure 5 As shown, the baffle 7 is inclinedly arranged on the hopper plate 2. The baffle 7 is inclinedly arranged on the hopper plate 2 so that one end of the baffle 7 is at a higher position and the other end is at a lower position on the hopper plate 2. This allows the fluorinated alumina that has been blocked and filtered out by the baffle 7 and has formed into blocks or flakes to be discharged along the inclined direction of the baffle 7. The inclined arrangement of the baffle 7 is to facilitate the discharge of the fluorinated alumina that has formed into blocks or flakes, avoid the situation of clogging the baffle 7, and help to ensure the screening of fluorinated alumina.

[0035] Example 5, based on Example 4, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 4 and Figure 5As shown, the baffle 7 is tilted at an angle of 10° to 15°. The tilt angle of the baffle 7 is 10° to 15° to facilitate the flow of fluorinated alumina, which has clumped into blocks or sheets, down the tilted direction of the baffle 7. Preferably, the tilt angle of the baffle 7 is set to 15° because, compared to a 10° tilt angle, a 15° tilt angle provides a steeper slope, making it easier for the fluorinated alumina to fall and reducing the likelihood of it accumulating on the baffle 7.

[0036] Example 6, based on any one of Examples 1 to 5, a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 and Figure 3 As shown, at least two flow-blocking plates 6 are arranged along the inflow direction of the fluorinated alumina. The purpose of setting at least two flow-blocking plates 6 is to impede and slow down the flow at least twice on the hopper plate 2, which is beneficial for the thorough screening of the fluorinated alumina.

[0037] Example 7, based on Example 6, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the bucket plate 2 is provided with at least three diversion plates 4, which are arranged in parallel, and a diversion channel is formed between two adjacent diversion plates 4. The purpose of providing at least three diversion plates 4 is to form at least three outlet paths on the device of this application, ensuring uniform or on-demand distribution of the fluorinated alumina.

[0038] Example 8, based on Example 7, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the hopper 1 is equipped with an arc plate 5. The arc plate 5 is designed to receive the fluorinated aluminum oxide that passes through the baffle 7 and falls, thereby reducing the impact force of the falling fluorinated aluminum oxide.

[0039] Example 9, based on Example 8, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 and Figure 3 As shown, the top of the arc plate 5 is connected to the diverter plate 4. The connection between the top of the arc plate 5 and the diverter plate 4 is for further fixing of the diverter plate 4. That is, the arc plate 5 supports the diverter plate 4, and the diverter plate 4 is merely placed on the bucket plate 2. The diverter plate 4 and the bucket plate 2 are not directly fixed together.

[0040] Example 10, based on Example 9, provides a fluorine-loaded alumina screening device, such as... Figure 1 , Figure 2 and Figure 3As shown, the bottom of the hopper 1 is provided with a venting plate, and the bottom of the venting plate is connected to an air chamber 3. The venting plate and the air chamber 3 are designed to allow the unconsolidated fluorinated alumina entering the hopper 1 to flow freely, so that the unconsolidated fluorinated alumina can re-enter the secondary circulation pipe.

[0041] In Example 10, fluorinated alumina, whether clump-formed or sheet-formed, and unclumped, slide down the hopper plate 2, passing sequentially through the baffle plate 6 and the diverting plate 4. The fluorinated alumina is then screened by the slotted holes 8 on the baffle plate 7. The size of the clump-formed fluorinated alumina is larger than the slotted holes 8, while the size of the unclumped fluorinated alumina is smaller than the slotted holes 8. The unclumped fluorinated alumina can continue falling through the slotted holes 8, while the clump-formed fluorinated alumina cannot. The strip-shaped hole 8 is blocked by the baffle 7, thereby achieving the screening of fluorinated alumina. Fluorinated alumina that has clumped into blocks or flakes is blocked by the baffle 7 and screened out. Then it is cleaned and discharged along the inclined direction of the baffle 7 and manually cleaned. Fluorinated alumina that has not clumped continues to fall through the baffle 7. After passing the arc plate 5, the unclumped fluorinated alumina falls into the hopper 1. The air permeable plate and the air chamber 3 make the unclumped fluorinated alumina that has entered the hopper 1 flow and enter the secondary circulation pipeline.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fluorinated alumina screening device, comprising a hopper plate (2) arranged inclined along the flow direction of the fluorinated alumina, characterized in that, Along the direction of the inflow of fluorinated alumina, a flow-blocking plate (6) and a flow-dividing plate (4) are arranged in sequence on the hopper plate (2). A baffle (7) for screening fluorinated alumina is provided at the outlet of the flow-dividing plate (4). A hopper (1) for collecting fluorinated alumina that has not clumped into blocks or flakes is provided at the bottom of the hopper plate (2). The hopper (1) is located below the baffle (7).

2. The fluorine-loaded alumina screening device according to claim 1, characterized in that: The baffle (7) is fixedly connected to the bucket plate (2), and the connection between the baffle (7) and the bucket plate (2) is provided with strip holes (8) for screening out alumina fluoride that has agglomerated into blocks or sheets; a plurality of the strip holes (8) are arranged sequentially along the inclined direction of the baffle (7).

3. The fluorine-loaded alumina screening device according to claim 2, characterized in that: The angle of inclination of the bucket plate (2) is 40°~50°.

4. The fluorine-loaded alumina screening device according to claim 3, characterized in that: The baffle (7) is inclinedly arranged on the bucket plate (2).

5. The fluorine-loaded alumina screening device according to claim 4, characterized in that: The angle of inclination of the baffle (7) is 10°~15°.

6. The fluorine-loaded alumina screening device according to any one of claims 1 to 5, characterized in that: At least two of the flow-blocking plates (6) are arranged along the direction of inflow of fluorinated alumina.

7. The fluorine-loaded alumina screening device according to claim 6, characterized in that: The bucket plate (2) is provided with at least three diversion plates (4), the at least three diversion plates (4) are arranged in parallel, and a diversion channel is formed between two adjacent diversion plates (4).

8. The fluorine-loaded alumina screening device according to claim 7, characterized in that: The hopper (1) is equipped with an arc plate (5).

9. The fluorine-loaded alumina screening device according to claim 8, characterized in that: The top of the arc plate (5) is connected to the diverter plate (4).

10. The fluorine-loaded alumina screening device according to claim 9, characterized in that: The bottom of the hopper (1) is provided with a venting plate, and the bottom of the venting plate is connected to an air chamber (3).

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