High-purity titanium dioxide, dust removal equipment and production line of high-purity titanium dioxide

Abstract

The invention relates to the technical field of titanium dioxide production, in particular to high-purity titanium dioxide, dust removal equipment and a production line of the high-purity titanium dioxide. The base body is rotationally arranged relative to the filtering part, has a first state and a second state, is far away from the filtering part in the first state, and is overlapped with the filtering part in the second state; the cleaning structure comprises a movable block and a sweeping block, the movable block is arranged on the base body in a sliding mode, the sweeping block is connected with the movable block, and the filter part is swept when the movable block slides; the recycling structure is arranged on one side of the base body, an L-shaped recycling channel is formed in the recycling structure, and the recycling structure is used for receiving and recycling impurities. The dust removal equipment has the advantages of being convenient to operate and small in harm to the environment and operators.

Description

Technical Field

[0001] The present application relates to the technical field of titanium dioxide production, and in particular to a high-purity titanium dioxide, dust removal equipment and a production line thereof. Background Art

[0002] Titanium dioxide is a white solid or powder with a high refractive index and is widely used in the fields of pigments, cosmetics, electronics, and catalysis. For example, high-purity titanium dioxide (up to optical grade) can be well used in the manufacture of electronic components, such as MLCC, PTC, PZT, and 5G information ceramic filters.

[0003] The production process of titanium dioxide mainly goes through the steps of refining titanium tetrachloride → hydrolysis → filtration → washing → calcination → crushing. In order to obtain high-purity titanium dioxide, adaptive filtration treatment will be carried out in each step of the preparation process.

[0004] Among them, the titanium dioxide bricks obtained by calcination will enter the crusher for crushing, and the obtained powder will be blown into the next unit through the blowing equipment. A dust removal device will be set at the output end of the blowing equipment to intercept impurities in the powder to improve the purity of titanium dioxide.

[0005] In order to ensure the filtering effect of the dust removal equipment, the dust removal equipment is usually disassembled from the blowing equipment for cleaning on a regular basis. This operation method is relatively troublesome, and not only will impurities adhere to the dust removal equipment, but a certain amount of silica powder will also accumulate. Frequent removal and cleaning of the filter will cause dust pollution, which is harmful to the environment and operators.

[0006] In view of this, it becomes a market demand to provide a dust removal equipment which is easy to operate and has little harm to the environment and operators. Summary of the invention

[0007] The purpose of the present application is to provide a dust removal device which is easy to operate and has little harm to the environment and operators.

[0008] In the first aspect, the dust removal equipment provided by the present application adopts the following technical solution:

[0009] A dust removal device for titanium dioxide production, comprising:

[0010] Filter element;

[0011] A base body is rotatably arranged relative to the filter element, the base body has a first state and a second state, the base body is away from the filter element in the first state, and overlaps with the filter element in the second state;

[0012] The cleaning structure comprises a movable block and a cleaning block, wherein the movable block is slidably disposed on the base body, and the cleaning block is connected to the movable block to clean the filter element when the movable block slides;

[0013] The recovery structure is arranged on one side of the base body, and an L-shaped recovery channel is provided on the recovery structure for receiving and recovering impurities.

[0014] Furthermore, a compression structure for compressing impurities is also included, and the compression structure includes:

[0015] A pressing sleeve, which is sleeved outside the movable block and is slidably connected with the movable block;

[0016] An elastic member, one end of which abuts against the pressing sleeve, and the other end of which abuts against the movable block;

[0017] An oblique guide plate is arranged in the recovery channel;

[0018] When the pressing sleeve enters into the recovery channel, it contacts the inclined surface of the inclined guide plate and moves toward the cleaning block to cover the cleaning block and squeeze the impurities into embryos.

[0019] Furthermore, an ejection structure is also provided in the recycling channel, and the ejection structure comprises:

[0020] An ejector, disposed toward an output end of the recovery channel;

[0021] A displacement detection module, arranged at the output end of the ejector, for detecting the thickness of the impurity pressed embryo;

[0022] When the thickness of the impurity pressed embryo reaches a preset value, the ejector obtains an ejection signal and ejects the impurity pressed embryo from the output end of the recovery channel to the outside of the blowing device.

[0023] Furthermore, the displacement detection module includes:

[0024] A carbon film plate, arranged at the output end of the ejector, with a brush slidably connected to the carbon film plate;

[0025] A controller, electrically connected to the carbon film plate;

[0026] The magnetic induction structure comprises a first magnetic attraction member and a second magnetic attraction member, wherein the first magnetic attraction member is arranged on the brush, and the second magnetic attraction member is arranged in the movable block;

[0027] When the pressing sleeve enters the recovery channel, the brush is driven to move by the magnetic induction structure to form a displacement signal.

[0028] Furthermore, a mounting groove is provided on the filter element, and when the base and the filter element are overlapped, the recovery structure at least partially extends into the mounting groove, so that the output end of the ejector is lower than the base or flush with the end surface of the base.

[0029] Furthermore, it also includes a protective plate rotatably disposed above the filter element, and the base body is covered by the protective plate at least in the first state.

[0030] Furthermore, a scraping structure for scraping the powder on the guard plate is slidably provided on the guard plate, and the scraping structure includes:

[0031] Scraper;

[0032] A pair of slide rails, arranged oppositely on both sides of the scraper and slidably connected with the guard plate;

[0033] A connecting member, one end of which is rotatably connected to the slide rail, and the other end of which is rotatably connected to the base.

[0034] Furthermore, the guard plate is arranged in an L-shape toward one end of the filter element and is provided with a material discharge hole, and a sealing plate is slidably arranged on the guard plate;

[0035] The scraping structure pushes the sealing plate to slide relative to the guard plate, so that when the base is in the first state, the sealing plate closes the discharge hole, and when the base is in the second state, the sealing plate opens the discharge hole.

[0036] In a second aspect, the present application provides a titanium dioxide production line, which at least includes a pulverizer, an air blowing device and the above-mentioned dust removal device.

[0037] In a third aspect, the present application provides a titanium dioxide prepared using the above-mentioned production line.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. The cleaning structure in the present application is arranged in the air blowing device, and the operator does not need to repeatedly take out, clean and reset the filter element, which makes the operation simpler;

[0040] During cleaning, impurities are swept to one side of the filter element by the cleaning structure, while the silica powder attached to the filter element can be directly collected by the output end of the blowing device, reducing product waste. It also reduces dust pollution caused by the two processes of transporting the filter element to the cleaning equipment and cleaning it in the cleaning equipment when the filter element is disassembled for cleaning, thus providing better protection for the environment and operators.

[0041] 2. The present application provides a recovery structure to collect impurities. The recovery structure is provided with a compression structure and an ejection structure. The compression structure can compress the impurities into impurity pressed embryos. When the thickness of the impurity pressed embryos finally reaches a preset thickness as the number of cleanings increases, the ejection structure ejects the impurity pressed embryos. That is, after cleaning the filter element multiple times, only the impurity pressed embryos need to be processed once, which is more convenient to operate.

[0042] 3. In the present application, a protective plate is provided to protect the recovery structure and the cleaning structure when the filter element is performing normal filtering work, so as to reduce the infiltration and accumulation of powder in the recovery structure and the cleaning structure when the recovery structure and the cleaning structure are not in working state.

[0043] 4. A scraping structure is provided in the present application to scrape the powder attached to the guard plate. The powder collected by scraping will pass through the guard plate into the recovery channel to reduce the possibility of the guard plate being unable to work due to excessive load. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a cross-sectional schematic diagram of the dust removal device in this application;

[0045] Figure 2 It is a partial structural schematic diagram of the dust removal equipment in this application;

[0046] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A;

[0047] Figure 4 yes Figure 2 A partial enlarged schematic diagram of part B;

[0048] Figure 5 yes Figure 1 A partial enlarged schematic diagram of part C in the middle;

[0049] In the figure, 1, filter element; 11, mounting groove; 2, substrate; 3, cleaning structure; 31, movable block; 32, cleaning block; 4, recovery structure; 41, recovery channel; 5, compression structure; 51, pressing sleeve; 52, elastic member; 53, oblique guide plate; 6, ejection structure; 61, ejection member; 62, displacement detection module; 621, carbon film plate; 622, controller; 623, magnetic induction structure; 6231, first magnetic attraction member; 6232, second magnetic attraction member; 624, brush; 7, guard plate; 71, feed hole; 72, first movable plate; 73, second movable plate; 8, scraping structure; 81, scraper; 82, slide rail; 83, connector; 9, blowing equipment; 91, movable hole; 10, sealing plate. DETAILED DESCRIPTION

[0050] The following will be combined with the attached Figure 1-5The technical solution of the present application is described clearly and completely. The following embodiments are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application. In the following description, the same symbols are used to represent the same or equivalent elements, and repeated descriptions are omitted.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] It should be further understood that the term “and / or” used in the specification and corresponding claims of this application refers to any and all possible combinations of one or more of the listed items.

[0054] A titanium dioxide production line includes a pulverizer, an air blowing device 9 and a dust removal device. The air blowing device 9 is connected to the pulverizer. The dust removal device is arranged at the output end of the air blowing device 9. The titanium dioxide bricks obtained by calcination enter the pulverizer for pulverization. After the obtained powder passes through the air blowing device 9 and outputs wind power, impurities are filtered out by the dust removal device, and then the powder is bagged, packaged and shipped.

[0055] Reference Figure 1 The dust removal device includes a filter element 1 and a substrate 2. The filter element 1 is detachably arranged in the blowing device 9. The substrate 2 is rotatably arranged relative to the filter element 1. The substrate 2 has a first state and a second state. The substrate 2 is away from the filter element 1 in the first state and overlaps with the filter element 1 in the second state. When the substrate 2 is in the second state, the filter element 1 is cleaned by a sliding cleaning structure 3.

[0056] Further, refer to Figure 2 and Figure 3, and also includes a cleaning structure 3, the cleaning structure 3 includes a movable block 31 and a cleaning block 32, the cleaning block 32 is connected to the movable block 31, the movable block 31 is slidably set on the base 2 and is retractable to adaptively adjust the distance between the cleaning block 32 and the filter element 1, so that the cleaning block 32 and the filter element 1 have better contact and ensure the cleaning effect. At the same time, when the cleaning structure 3 is reset, the cleaning block 32 and the filter element 1 maintain a distance.

[0057] The entire cleaning process is carried out in the air blowing device 9, and the operator does not need to repeatedly take out, clean, and reset the filter element 1, thereby making the operation simpler.

[0058] During cleaning, impurities are swept to one side of the filter element 1, and the silica powder attached to the filter element 1 can be directly collected by the output end of the blowing device 9, reducing the waste of products and also reducing the dust pollution caused by the two processes of transporting the filter element 1 to the cleaning equipment and cleaning it in the cleaning equipment when the filter element 1 is disassembled for cleaning.

[0059] Correspondingly, refer to Figure 2 and Figure 4 The dust removal device also includes a recovery structure 4, which is arranged on one side of the substrate 2. An L-shaped recovery channel 41 is opened on the recovery structure 4, and the impurities cleaned by the cleaning structure 3 enter the recovery structure 4 from the recovery channel 41.

[0060] Furthermore, combined with Figure 1 An active hole 91 is provided on the blowing device 9 . When the substrate 2 is in the first state, the output end of the recovery channel 41 is connected to the active hole 91 , and the cleaned impurities are directly taken out from the active hole 91 .

[0061] Further, refer to Figure 2 and Figure 4 , and also includes a compression structure 5 for compressing impurities, the compression structure 5 includes a compression sleeve 51, an elastic member 52 and an inclined guide plate 53, the compression sleeve 51 is sleeved outside the movable block 31 and is slidably connected to the movable block 31, one end of the elastic member 52 is abutted against the compression sleeve 51, and the other end of the elastic member 52 is abutted against the movable block 31, and the inclined guide plate 53 is arranged in the recovery channel 41.

[0062] The inclined guide plate 53 includes an integrally formed inclined portion and a straight portion. Before the cleaning structure 3 enters the recovery channel 41, the cleaning block 32 cleans the filter element 1; after the cleaning structure 3 enters the recovery channel 41, the pressing sleeve 51 contacts the inclined guide plate 53 during the process of the cleaning structure 3 moving toward the inclined guide plate 53.

[0063] Guided by the oblique part, the pressing sleeve 51 will slide toward the cleaning block 32 until it is completely covered with the cleaning block 32. The cleaning block 32 is now in a compressed state. Then the straight part maintains the position of the pressing sleeve 51. The pressing sleeve 51 will continue to push the impurities until the impurities are pressed into embryos.

[0064] The impurities in powder form are pressed into impurity pressed embryos in the form of flakes or cakes, so that the impurities can be taken out from the movable hole 91 .

[0065] In a specific embodiment, a pressure sensor is provided on the pressing sleeve 51, and the movable block 31 is electrically driven. When the pressure exerted by the pressing sleeve 51 on the recovery channel 41 reaches a preset value, the pressure sensor transmits a control signal to the movable block 31 to make the pressing sleeve 51 stationary and maintain the current position state.

[0066] It should be noted that the preset pressure value can be specifically set according to the actual situation to ensure that the impurity pressed embryo can maintain a stable state after being pressed and formed.

[0067] Correspondingly, refer to Figure 2 and Figure 4 An ejection structure 6 is provided in the recovery channel 41. When the thickness of the impurity pressed embryo reaches a predetermined value, the ejection structure 6 ejects the impurity pressed embryo.

[0068] The ejection structure 6 includes an ejection member 61 and a displacement detection module 62 , wherein the ejection member 61 is disposed toward the output end of the recovery channel 41 , and the displacement detection module 62 is disposed at the output end of the ejection structure 6 for detecting the thickness of the impurity pressed embryo.

[0069] Specifically, the displacement detection module 62 includes a carbon film plate 621, a controller 622 and a magnetic induction structure 623. The carbon film plate 621 is arranged at the output end of the ejection member 61. A brush 624 is slidably connected to the carbon film plate 621. The controller 622 is electrically connected to the carbon film plate 621. The magnetic induction structure 623 includes a first magnetic member 6231 and a second magnetic member 6232. The first magnetic member 6231 is arranged on the brush 624, and the second magnetic member 6232 is arranged in the movable block 31.

[0070] When the pressing sleeve 51 enters the recovery channel 41, a magnetic force is formed between the second magnetic attraction member 6232 and the second magnetic attraction member 6232, that is, the brush 624 is driven to move through the magnetic induction structure 623 to form a displacement signal. When the pressing sleeve 51 squeezes the impurity particles to form an impurity pressed embryo, the controller 622 obtains the displacement signal when the pressing sleeve 51 remains stationary at this time. When the thickness of the impurity pressed embryo reaches a preset value, the controller 622 sends an ejection signal to the ejection member 61, and the ejection member 61 ejects the impurity pressed embryo from the output end of the recovery channel 41 to the outside of the blowing device 9.

[0071] The impurity pressed embryo will gradually become thicker as the cleaning structure 3 cleans the filter element 1 multiple times. In a specific embodiment, when the thickness of the impurity pressed embryo reaches the size of the diameter of the recovery channel 41, the impurity pressed embryo is ejected by the ejector 61, that is, after cleaning the filter element 1 multiple times, the impurity pressed embryo only needs to be processed once, which is more convenient to operate.

[0072] It should be noted that when the controller 622 sends an ejection signal to the ejector 61, it also sends a displacement signal to the cleaning structure 3 to make the pressing sleeve 51 retreat, and the pressing sleeve 51 releases the pressure on the impurity pressed embryo.

[0073] Further, refer to Figure 2 A mounting groove 11 is provided on the filter element 1. When the base 2 is rotated from the first state to the second state and overlapped with the filter element 1, the recovery structure 4 at this time at least partially extends into the mounting groove 11, so that the output end of the ejector 61 is lower than the base 2 or flush with the end surface of the base 2.

[0074] That is, the mounting groove 11 is used to accommodate the recovery structure 4 and the ejection structure 6 located in the recovery channel 41 , so that the impurities can be smoothly transported to the output end of the ejection member 61 and smoothly ejected by the ejection member 61 to the outside of the blowing device 9 .

[0075] It should be noted that a sealing plate 10 (through a spring or a torsion spring) can be reset at the mounting groove 11 of the filter element 1 and the movable hole 91 of the blowing device 9, so as to seal the mounting groove 11 and the movable hole 91 to reduce the possibility of some dust entering the mounting groove 11 during the filtration process, and reduce the possibility of dust pollution generated during the filtration process and the cleaning process escaping to the outside of the blowing device 9.

[0076] In addition, refer to Figure 1 and Figure 5 The dust removal device further comprises a guard plate 7 rotatably disposed above the filter element 1, and the base body 2 is covered by the guard plate 7 at least in the first state.

[0077] In a specific embodiment, the guard plate 7 is retractable, and the guard plate 7 includes a first movable plate 72 and a second movable plate 73. The second movable plate 73 is slidably connected to the first movable plate 72. A driving member (not shown in the figure) is provided between the first movable plate 72 and the second movable plate 73 for driving the second movable plate 73 to slide relative to the first movable plate 72.

[0078] Specifically, a push switch (not shown in the figure) is provided on the blowing device 9. When the base 2 is in the first state, the first movable plate 72 contacts the push switch. When the base 2 starts to rotate, the first movable plate 72 is disconnected from the push switch, so that the driving member obtains a signal and pushes the second movable plate 73 to move away from the first movable plate 72 to extend the guard plate 7. When the base 2 is reset to the first state, the first movable plate 72 contacts the push switch again, and the driving member pulls the second movable plate 73. The second movable plate 73 moves toward the first movable plate 72, and the guard plate 7 retracts to its initial length.

[0079] That is, the guard plate 7 covers the base body 2 when the base body 2 is in the first state, the second state, and in the process of moving from the second state to the second state.

[0080] The protective plate 7 is provided to protect the recovery structure 4 and the cleaning structure 3 when the filter element 1 is performing normal filtering work, thereby reducing the infiltration and accumulation of powder in the recovery structure 4 and the cleaning structure 3 when the recovery structure 4 and the cleaning structure 3 are not in working state.

[0081] Furthermore, considering that part of the powder will be enriched on the guard plate 7, a scraping structure 8 is slidably provided on the guard plate 7. The scraping structure 8 scrapes the powder on the guard plate 7 when the guard plate 7 rotates, thereby reducing the possibility that the guard plate 7 cannot work due to excessive load.

[0082] Specifically, refer to Figure 5 The scraping structure 8 includes a scraper 81, a connecting member 83 and a pair of slide rails 82. The pair of slide rails 82 are arranged on both sides of the scraper 81 and are slidably connected to the guard plate 7. One end of the connecting member 83 is rotatably connected to the slide rail 82, and the other end of the connecting member 83 is rotatably connected to the base 2.

[0083] When the base 2 rotates, the scraping structure 8 will be pulled to slide relative to the guard plate 7 through the connecting member 83, so that the dust removal equipment has higher integrity and linkage, and the setting of the driving parts is reduced.

[0084] Furthermore, the guard plate 7 is arranged in an L-shape at one end facing the filter element 1 and is provided with a discharge hole 71. The L-shaped corner can better intercept dust, thereby reducing the possibility that part of the powder will slide onto the filter element 1 when the scraping structure 8 cleans the guard plate 7.

[0085] In addition, a feeding hole 71 is provided on the guard plate 7, and a sealing plate 10 is slidably provided to open and close the feeding hole 71. The powder intercepted on the guard plate 7 is cleaned by the scraping structure 8 and enriched in the feeding hole 71, and finally smoothly enters the recovery structure 4 from the output end of the recovery channel 41.

[0086] Specifically, when the base 2 pushes the scraping structure 8, the slide rail 82 contacts the sealing plate 10 and pushes the sealing plate 10 to slide relative to the guard plate 7, so that when the base 2 is in the first state, the sealing plate 10 closes the feeding chute, and when the base 2 is in the second state, the sealing plate 10 opens the feeding hole 71. At this time, the feeding hole 71 is located above the recovery channel 41, and the powder enters the recovery channel 41 from the output end of the recovery channel 41.

[0087] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dust removal device for titanium dioxide production, arranged at the output end of a blowing device (9), characterized in that: include: Filter element (1); A base (2) is rotatably arranged relative to the filter element (1), the base (2) having a first state and a second state, the base (2) being away from the filter element (1) in the first state and overlapping with the filter element (1) in the second state; The cleaning structure (3) comprises a movable block (31) and a cleaning block (32), wherein the movable block (31) is slidably disposed on the base body (2), and the cleaning block (32) is connected to the movable block (31) to clean the filter element (1) when the movable block (31) slides; The recovery structure (4) is arranged on one side of the base (2), and an L-shaped recovery channel (41) is provided on the recovery structure (4) for receiving and recovering impurities.

2. The dust removal device according to claim 1, characterized in that: It also includes a compression structure (5) for compressing impurities, the compression structure (5) comprising: A pressing sleeve (51) is sleeved outside the movable block (31) and is slidably connected to the movable block (31); An elastic member (52), one end of which abuts against the pressing sleeve (51) and the other end of which abuts against the movable block (31); An oblique guide plate (53) is arranged in the recovery channel (41); When the pressing sleeve (51) enters the recovery channel (41), it contacts the inclined surface of the inclined guide plate (53) and moves toward the cleaning block (32), covers the cleaning block (32) and squeezes the impurities into embryos.

3. The dust removal device according to claim 2, characterized in that: The recycling channel (41) is also provided with an ejection structure (6), and the ejection structure (6) comprises: An ejector (61) is disposed toward the output end of the recovery channel (41); A displacement detection module (62), arranged at the output end of the ejector (61), for detecting the thickness of the impurity pressed embryo; When the thickness of the impurity pressed embryo reaches a preset value, the ejection member (61) obtains an ejection signal and ejects the impurity pressed embryo from the output end of the recovery channel (41) to the outside of the blowing device (9).

4. The dust removal device according to claim 3, characterized in that: The displacement detection module (62) comprises: A carbon film plate (621) is arranged at the output end of the ejector (61), and a brush (624) is slidably connected to the carbon film plate (621); A controller (622), electrically connected to the carbon film plate (621); A magnetic induction structure (623), comprising a first magnetic attraction component (6231) and a second magnetic attraction component (6232), wherein the first magnetic attraction component (6231) is arranged on the brush (624), and the second magnetic attraction component (6232) is arranged in the movable block (31); When the pressing sleeve (51) enters the recovery channel (41), the brush (624) is driven to move by the magnetic induction structure (623), thereby generating a displacement signal.

5. The dust removal device according to claim 3, characterized in that: The filter element (1) is provided with a mounting groove (11); when the base (2) and the filter element (1) are superimposed, the recovery structure (4) at least partially extends into the mounting groove (11), so that the output end of the ejector (61) is lower than the base (2) or flush with the end surface of the base (2).

6. The dust removal device according to claim 1, characterized in that: It also comprises a protective plate (7) rotatably arranged above the filter element (1), and the base body (2) is covered by the protective plate (7) at least in the first state.

7. The dust removal device according to claim 6, characterized in that: A scraping structure (8) for scraping powder on the guard plate (7) is slidably provided on the guard plate (7), and the scraping structure (8) comprises: Scraper (81); A pair of slide rails (82) are disposed opposite to each other on both sides of the scraper (81) and are slidably connected to the guard plate (7); A connecting member (83) has one end rotatably connected to the slide rail (82) and the other end rotatably connected to the base (2).

8. The dust removal device according to claim 7, characterized in that: The guard plate (7) is arranged in an L-shape at one end facing the filter element (1), a material discharge hole (71) is provided on the guard plate (7), and a sealing plate (10) is slidably arranged to open and close the material discharge hole (71); The slide rail (82) pushes the sealing plate (10) to slide relative to the guard plate (7), so that when the base (2) is in a first state, the sealing plate (10) closes the discharge hole (71), and when the base (2) is in a second state, the sealing plate (10) opens the discharge hole (71).

9. A titanium dioxide production line, characterized in that: It at least comprises a pulverizer, an air blowing device (9) and the dust removal device according to any one of claims 1 to 8.

10. A high-purity titanium dioxide, characterized in that: The method is prepared by using the production line described in claim 9.

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