A method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst

Abstract

The present invention relates to a method for extracting anatase coarse powder by using waste vanadium-titanium denitration catalyst, comprising the following steps: A. surface pretreatment, B. pore impurity treatment, C. pickling and drying, and D. Raymond ultrafine grinding. The purpose of the present invention is to solve or at least alleviate the problem of low utilization rate of spent catalyst when currently using spent catalyst to extract anatase coarse powder, and to provide a method for extracting anatase coarse powder by using spent vanadium-titanium denitration catalyst.

Description

Technical Field

[0001] The invention belongs to the technical field of disposal of waste denitration catalysts, and in particular relates to a method for extracting anatase coarse powder by utilizing waste vanadium-titanium denitration catalysts. Background Art

[0002] Titanium dioxide has the highest mass percentage in waste vanadium titanium denitration catalysts, which can reach 80%-90%. Waste vanadium titanium denitration catalysts are divided into two categories according to whether they can be recycled: one is a deactivated catalyst, which means that the catalyst module has not changed its physical structure due to fly ash blockage and other reasons during use, and some monomers can be regenerated to meet the needs of the denitration system by removing the blocked fly ash and adding active substances to adjust the activity; the other is an invalid catalyst, which means that the catalyst carrier has changed its physical structure due to fly ash impact, thermal action, sintering and damage during use, and cannot meet the regeneration requirements. Physical and chemical methods can be used to extract anatase coarse powder from it. Anatase coarse powder (TiO2>85%) is mainly used to manufacture coatings, plastics, cement, new catalyst production raw materials, papermaking sunscreens, and graphite composite fishing rods and golf clubs. Therefore, the use of waste denitration catalysts to extract anatase coarse powder has considerable market value. At the same time, the disposal of waste denitration catalysts has far-reaching significance for resource recycling in the field of flue gas denitration and environmental protection in the country and for promoting the sustainable development of my country's circular economy.

[0003] However, there are many impurities in the spent catalyst, and there will be many impurities in the rough anatase powder obtained after crushing, which affects the quality of the final rough anatase powder. At present, the means of removing impurities by physical and chemical methods cause a large loss of rough anatase powder, and the utilization rate of spent catalyst is low. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, solve or at least alleviate the problem of low utilization rate of spent catalysts when currently used to extract rutile crude powder, and provide a method for extracting rutile crude powder using waste vanadium-titanium denitrification catalysts.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst comprises the following steps:

[0007] A. Surface pretreatment: cleaning the surface of the whole module of the waste vanadium-titanium denitration catalyst, and then removing the outer body of the whole module after cleaning to obtain the strip-shaped waste vanadium-titanium denitration catalyst monomer;

[0008] B. Pore impurity treatment: the waste vanadium-titanium denitration catalyst monomer in step A is crushed by a crusher, and the powdery ash and magnetic impurities therein are removed after crushing to obtain a flake material;

[0009] C. Pickling and drying: Spread the sheet material in step B flatly, spray and rinse it with 2% dilute sulfuric acid and pure water in sequence, and then dry it;

[0010] D. Raymond ultrafine grinding: grind the flake material after pickling and drying in step C into micro powder with a particle size of less than 25 μm in an ultrafine grinder to obtain anatase coarse powder.

[0011] In order to further realize the present invention, the following technical solutions may be preferably selected:

[0012] Preferably, the crusher in step B comprises a shell, an upper pressure roller group and a lower pressure roller group, the shell is in the shape of a rectangular shell with upper and lower ends opened, the upper pressure roller group is located at the upper part of the shell, and a plurality of groups of the lower pressure roller groups are arranged in an array below the upper pressure roller group;

[0013] The upper pressing roller group comprises two upper pressing rollers which rotate synchronously in opposite directions, and the two upper pressing rollers translate synchronously in opposite directions;

[0014] The lower pressure roller group includes two lower pressure roller components, and the lower pressure roller components include a lower pressure roller and a magnet roller. The magnet roller coaxially rotates and sleeves inside the lower pressure roller. The lower pressure roller is made of a non-magnetic material, and the magnet roller is made of a magnetic material. The two lower pressure rollers of the same lower pressure roller group rotate synchronously in opposite directions and translate synchronously in opposite directions. The lower pressure roller and the magnet roller of the same lower pressure roller component rotate synchronously in opposite directions.

[0015] A middle guide plate is provided between the upper pressure roller and the uppermost lower pressure roller and between two upper and lower adjacent lower pressure rollers. The upper end of the middle guide plate is hinged to the lower part of the adjacent upper pressure roller or the lower pressure roller, and the two sides of the lower end are hinged to the two sides of the upper part of the adjacent lower pressure roller. A gap is formed between the middle part of the lower end of the middle guide plate and the adjacent lower pressure roller.

[0016] A scraper is arranged at the lower part of the outer side of the lower pressure roller. The scraper is arranged radially along the lower pressure roller. The upper end of the scraper is tangent to the circumferential outer wall of the lower pressure roller, and the lower end extends downwardly at an angle.

[0017] Preferably, the upper pressure roller group further includes an upper linkage component, and the upper linkage component includes an upper linkage shaft, an upper translation shaft and an upper linkage seat;

[0018] The end of the upper pressure roller extends out of the outer shell and is fixedly sleeved with an upper worm gear. The upper linkage seat is fixedly and rotatably provided with an upper worm sleeve. The upper linkage shaft and the upper translation shaft are both horizontally and rotatably arranged on the outside of the outer shell. The upper worm sleeve is axially slidably sleeved on the upper linkage shaft and meshes with the upper worm gear. The upper part of the upper linkage seat is rotatably sleeved on a section of the upper pressure roller extending out of the outer shell, and the lower part is threadedly sleeved on the upper translation shaft.

[0019] Preferably, the lower pressure roller group further includes a lower linkage component, and the lower linkage component includes a lower linkage shaft, a lower translation shaft and a lower linkage seat;

[0020] The end of the lower pressure roller extends out of the shell and is fixedly sleeved with a lower worm wheel and a driving gear. The end of the magnet roller extends out of the shell and the lower pressure roller and is fixedly sleeved with a driven gear ring. The driven gear ring is coaxially arranged with the driving gear. The lower linkage seat is fixedly and rotatably provided with a lower worm sleeve. The lower linkage shaft and the lower translation shaft are both horizontally rotatably arranged on the outside of the shell. The lower worm sleeve is axially slidably sleeved on the lower linkage shaft and meshes with the lower worm wheel. The lower part of the lower linkage seat is rotatably sleeved on a section of the lower pressure roller extending out of the shell, and the lower part is threadedly sleeved on the lower translation shaft. The lower linkage seat is rotatably provided with a plurality of transmission gears, and the transmission gear is located between the driving gear and the driven gear ring and is transmission-meshed with the driving gear and the driven gear ring.

[0021] Preferably, an upper guide plate is provided on the upper portion of the upper pressure roller, and the upper guide plate is slidably arranged on the outer shell in a transverse manner, and the lower end of the upper guide plate slides against the circumferential outer wall of the upper pressure roller;

[0022] Upper positioning plates are rotatably sleeved on both ends of the upper pressure roller, and the upper positioning plates are slidably fitted on the inner side of the shell, and both sides of the lower end of the upper guide plate are fixedly connected to the two upper positioning plates respectively.

[0023] Preferably, lower positioning plates are rotatably sleeved on both ends of the lower pressure roller, and the lower positioning plates are slidably fitted to the inner side of the shell;

[0024] The two sides of the upper end of the middle guide plate are respectively hinged to the lower parts of the two adjacent upper positioning plates or the lower parts of the two adjacent lower positioning plates, and the two sides of the lower end of the middle guide plate are respectively hinged to the upper parts of the two adjacent lower positioning plates;

[0025] The two sides of the scraper are respectively fixedly connected to two lower positioning plates at the two ends of the corresponding lower pressure roller.

[0026] Preferably, the upper and lower parts of the lower positioning plate are both provided with telescopic plates, the telescopic plates are radially slidably arranged in the lower positioning plate along the lower pressure roller, and the middle guide plate is hinged to one end of the telescopic plate extending outward from the lower positioning plate;

[0027] An angle is formed between the two telescopic plates at the upper and lower parts of the lower positioning plate, and the angle is 180°.

[0028] Preferably, the crusher includes a powder suction component, which includes a powder suction frame. The powder suction frame is in the shape of a sealed shell with one end open. The opening of the powder suction frame is sealed and connected to the outside of the middle guide plate. The area of ​​the middle guide plate located in the powder suction frame is evenly distributed with micropores, and the powder suction frame is connected to a negative pressure source.

[0029] Preferably, a powder collecting bin is provided in the outer shell, a filter plate is laterally provided at the lower part of the powder collecting bin, the periphery of the filter plate is sealed and connected to the inner side of the powder collecting bin, a section of the powder collecting bin below the filter plate is connected to the negative pressure source, and the upper part of the powder collecting bin is connected to the lower part of the powder suction frame through a hose.

[0030] Preferably, a buckle cover is detachably provided on the outer side of the shell, the upper linkage component and the lower linkage component are both located inside the buckle cover, and the upper linkage shaft, the upper translation shaft, the lower linkage shaft and the upper translation shaft are all rotatably provided on the buckle cover;

[0031] A drive shaft is vertically rotatably arranged inside the buckle cover, and the drive shaft is transmission-connected with the upper linkage shaft and the lower linkage shaft through a worm gear mechanism.

[0032] Through the above technical solution, the beneficial effects of the present invention are:

[0033] The present invention crushes the waste vanadium-titanium denitration catalyst monomer into flakes, and then pickles and dries them. The conventional recycling method is to directly crush them into powders. Not only is it difficult to remove impurities from the powders, but the loss rate of the powders during pickling is also high. The impurities are attached to the outside of the waste vanadium-titanium denitration catalyst. After being crushed into flakes, the impurities are attached to the outside of the flakes. Whether it is the impurities that fall during crushing or the impurities that fall during pickling, their volume is much smaller than the volume of the flakes, so it is easy to separate the impurities. The flakes are large in volume and are not easily washed away by the acid solution during pickling. Therefore, the larger the volume of the flakes, the less the loss during pickling.

[0034] The crusher of the present invention crushes the strip-shaped waste vanadium-titanium denitration catalyst monomers by graded pressing, which can ensure that the strip-shaped waste vanadium-titanium denitration catalyst monomers will not have a large position state deviation during crushing, so that the volume of the obtained flake material is larger. In addition, powdery ash and magnetic impurities are removed while crushing, simplifying the process flow and improving production efficiency; and when removing the powdery ash by suction, the flake material obtained by crushing will enter between the two lower pressing rollers longitudinally downward along the middle guide plate, avoiding being crushed after entering the two lower pressing rollers horizontally, thereby reducing the volume of the flake material. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 It is a structural cross-sectional view of the present invention;

[0037] Figure 3It is a structural schematic diagram of the present invention with the buckle cover removed;

[0038] Figure 4 It is a side view of the present invention with the buckle cover removed;

[0039] Figure 5 A structural cross-sectional view of the housing of the present invention;

[0040] Figure 6 It is a schematic diagram of assembling the upper pressure roller, the upper guide plate and the upper positioning plate of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the upper guide plate and the upper positioning plate of the present invention;

[0042] Figure 8 It is a structural schematic diagram of the upper linkage seat of the present invention;

[0043] Fig. 9 It is a schematic structural diagram of the upper worm sleeve of the present invention;

[0044] Fig.10 It is a schematic diagram of the assembly of the lower pressure roller, the magnet roller and the lower linkage seat of the present invention;

[0045] Fig.11 For the present invention Fig.10 Structural cross-sectional view of

[0046] Fig.12 For the present invention Fig.11 The enlarged view of point A in the middle;

[0047] Fig.13 For the present invention Fig.11 Sectional view at the middle BB;

[0048] Fig.14 It is a structural cross-sectional view of the lower pressure roller and the magnet roller of the present invention;

[0049] Fig.15 It is a structural schematic diagram of the lower linkage seat of the present invention;

[0050] Fig.16 It is a structural schematic diagram of the lower positioning plate and the scraper of the present invention;

[0051] Fig.17 It is a structural schematic diagram of the lower positioning plate and the telescopic plate of the present invention;

[0052] Fig.18 It is a schematic diagram of assembling the upper guide plate, the lower guide plate, the upper positioning plate, the lower positioning plate, the scraper and the powder suction frame of the present invention;

[0053] Fig.19 For the present invention Fig.18 A front view of

[0054] Among them: 1-housing; 2-upper pressure roller; 3-lower pressure roller; 4-magnet roller; 5-middle guide plate; 6-scraper; 7-upper linkage shaft; 8-upper translation shaft; 9-upper linkage seat; 10-upper worm wheel; 11-upper worm sleeve; 12-lower linkage shaft; 13-lower translation shaft; 14-lower linkage seat; 15-lower worm wheel; 16-driving gear; 17-driven gear ring; 18-lower worm sleeve; 19-transmission gear; 20-upper guide plate; 21-upper positioning plate; 22-lower positioning plate; 23-telescopic plate; 24-powder suction frame; 25-powder collecting bin; 26-filter plate; 27-buckle cover; 28-driving shaft. DETAILED DESCRIPTION

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0057] Embodiment 1:

[0058] like Figure 1-Figure 19 As shown, a method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst comprises the following steps:

[0059] A. Surface pretreatment: First, the surface of the entire module of the waste vanadium-titanium denitration catalyst is cleaned. The cleaning is done by blowing with compressed air. The motor is driven forward and reversely to blow the air pipe up and down twice. The compressed air pressure is 8Mpa. After the blowing, the entire module is dismantled to obtain strip-shaped waste vanadium-titanium denitration catalyst monomers. The asbestos at both ends of each monomer is removed and stacked on a pallet to complete the surface pretreatment process.

[0060] B. Pore impurity treatment: the waste vanadium-titanium denitration catalyst monomer in step A is crushed by a crusher, and the powdery ash and magnetic impurities therein are removed after crushing, and the obtained flake material is collected in a ton bag;

[0061] C. Pickling and drying: the flakes in step B are flattened and washed by chain conveyor. Two dilute sulfuric acid spray pipes and two pure water spray pipes are installed at intervals on the upper end of the chain. The flakes are washed by two-stage countercurrent washing. The first two steps are 2% dilute sulfuric acid washing to remove primary dust and impurities on the surface that are easily soluble in acid. The last two steps are pure water washing to remove impurities dissolved after pickling. The flakes are then put into a belt dryer for drying at a drying temperature of 300°C to complete the pickling and drying process.

[0062] D. Raymond ultrafine grinding: grind the flake material after pickling and drying in step C into micro powder with a particle size of less than 25 μm in an ultrafine grinder to obtain anatase coarse powder.

[0063] In step C, the first and second paths are dilute sulfuric acid spray pipes, the second path is new acid spray, and the acid water is collected and reused in the first spray; the third and fourth paths are pure water spray pipes, the fourth path is new pure water spray, and the outlet water is collected and reused in the third spray.

[0064] In order to ensure that the volume of the flaky material obtained by crushing is not too small, the crusher in step B includes a shell 1, an upper pressure roller group and a lower pressure roller group. The shell 1 is a rectangular shell with openings at both ends. The upper pressure roller group is located at the upper part of the shell 1, and multiple groups of lower pressure roller groups are arranged in an array below the upper pressure roller group.

[0065] The upper pressing roller group includes two upper pressing rollers 2 which rotate synchronously in opposite directions, and the two upper pressing rollers 2 translate synchronously in opposite directions;

[0066] The lower pressure roller group includes two lower pressure roller components, and the lower pressure roller components include a lower pressure roller 3 and a magnet roller 4. The magnet roller 4 coaxially rotates and sleeves inside the lower pressure roller 3. The lower pressure roller 3 is made of a non-magnetic material, and the magnet roller 4 is made of a magnetic material. The two lower pressure rollers 3 of the same lower pressure roller group rotate synchronously in opposite directions and translate synchronously in opposite directions. The lower pressure roller 3 and the magnet roller 4 of the same lower pressure roller component rotate synchronously in opposite directions.

[0067] A middle guide plate 5 is provided between the upper pressure roller 2 and the uppermost lower pressure roller 3 and between two upper and lower adjacent lower pressure rollers 3. The upper end of the middle guide plate 5 is hinged to the lower part of the adjacent upper pressure roller 2 or lower pressure roller 3, and the two sides of the lower end are hinged to the two sides of the upper part of the adjacent lower pressure roller 3. A gap is formed between the middle part of the lower end of the middle guide plate 5 and the adjacent lower pressure roller 3.

[0068] A scraper 6 is arranged at the lower outer part of the lower pressing roller 3. The scraper 6 is arranged radially along the lower pressing roller 3. The upper end of the scraper 6 is tangent to the circumferential outer wall of the lower pressing roller 3, and the lower end of the scraper 6 is inclined and extends downward.

[0069] In order to facilitate the adjustment of the distance between the two upper pressure rollers 2 and make the two upper pressure rollers 2 rotate synchronously in opposite directions, the upper pressure roller group further includes an upper linkage component, which includes an upper linkage shaft 7, an upper translation shaft 8 and an upper linkage seat 9;

[0070] The end of the upper pressure roller 2 extends out of the outer shell 1 and is fixedly sleeved with an upper worm gear 10. The upper linkage seat 9 is fixedly and rotatably provided with an upper worm sleeve 11. The upper linkage shaft 7 and the upper translation shaft 8 are both horizontally and rotatably arranged on the outside of the outer shell 1. The upper worm sleeve 11 is axially slidably sleeved on the upper linkage shaft 7 and meshes with the upper worm gear 10. The upper part of the upper linkage seat 9 is rotatably sleeved on a section of the upper pressure roller 2 extending out of the outer shell 1, and the lower part is threadedly sleeved on the upper translation shaft 8.

[0071] In order to facilitate the adjustment of the distance between the two lower pressing rollers 3 and make the two lower pressing rollers 3 rotate synchronously in opposite directions, and at the same time make the lower pressing roller 3 drive the inner magnet roller 4 to rotate synchronously in opposite directions, the lower pressing roller group also includes a lower linkage component, and the lower linkage component includes a lower linkage shaft 12, a lower translation shaft 13 and a lower linkage seat 14;

[0072] The end of the lower pressure roller 3 extends out of the shell 1 and is fixedly sleeved with a lower worm wheel 15 and a driving gear 16. The end of the magnet roller 4 extends out of the shell 1 and the lower pressure roller 3 and is fixedly sleeved with a driven ring gear 17. The driven ring gear 17 is coaxially arranged with the driving gear 16. The lower linkage seat 14 is fixedly and rotatably provided with a lower worm sleeve 18. The lower linkage shaft 12 and the lower translation shaft 13 are both horizontally and rotatably arranged on the outside of the shell 1. The lower worm sleeve 18 is axially slidably sleeved on the lower linkage shaft 12 and meshes with the lower worm wheel 15. The lower part of the lower linkage seat 14 is rotatably sleeved on a section of the lower pressure roller 3 extending out of the shell 1, and the lower part is threadedly sleeved on the lower translation shaft 13. The lower linkage seat 14 is rotatably provided with a plurality of transmission gears 19. The transmission gear 19 is located between the driving gear 16 and the driven ring gear 17 and is in transmission meshing with the driving gear 16 and the driven ring gear 17.

[0073] In order to ensure the stability of the position state of the spent catalyst when entering between the two upper pressure rollers 2 for crushing, an upper guide plate 20 is provided on the upper pressure roller 2. The upper guide plate 20 is slidably arranged on the housing 1 in a transverse direction, and the lower end of the upper guide plate 20 slides against the outer circumferential wall of the upper pressure roller 2.

[0074] Upper positioning plates 21 are rotatably sleeved at both ends of the upper pressure roller 2 , and the upper positioning plates 21 are slidably fitted to the inner side of the shell 1 , and both sides of the lower end of the upper guide plate 20 are fixedly connected to the two upper positioning plates 21 respectively.

[0075] In order to ensure that the spent catalyst crushed by the upper pressing roller 2 or the upper lower pressing roller 3 can enter between the two lower pressing rollers 3, the two ends of the lower pressing roller 3 are rotatably sleeved with lower positioning plates 22, and the lower positioning plates 22 are slidably fitted to the inner side of the shell 1;

[0076] Both sides of the upper end of the middle guide plate 5 are respectively hinged to the lower parts of the two adjacent upper positioning plates 21 or the lower parts of the two adjacent lower positioning plates 22, and both sides of the lower end of the middle guide plate 5 are respectively hinged to the upper parts of the two adjacent lower positioning plates 22;

[0077] The two sides of the scraper 6 are respectively fixedly connected to the two lower positioning plates 22 at the two ends of the corresponding lower pressure roller 3.

[0078] In order to change the position of the upper pressure roller 2 and the lower pressure roller 3 when the middle guide plate 5 changes position with them, the upper and lower parts of the lower positioning plate 22 are provided with telescopic plates 23, and the telescopic plates 23 are radially slidably arranged in the lower positioning plate 22 along the lower pressure roller 3, and the middle guide plate 5 is hinged to the telescopic plate 23 and extends outward from the lower positioning plate 22 at one end;

[0079] An angle of 180° is formed between the two telescopic plates 23 at the upper and lower parts of the lower positioning plate 22 .

[0080] In order to remove powdery ash during the crushing process and ensure that the flake material crushed by the upper lower pressure roller 3 enters the lower lower pressure roller 3 longitudinally, the crusher includes a powder suction component, and the powder suction component includes a powder suction frame 24. The powder suction frame 24 is in the shape of a sealed shell with one end open. The opening of the powder suction frame 24 is sealed and connected to the outside of the middle guide plate 5. The area of ​​the middle guide plate 5 located in the powder suction frame 24 is evenly distributed with micropores, and the powder suction frame 24 is connected to the negative pressure source.

[0081] In order to facilitate the collection of powdered ash, a powder collecting bin 25 is provided in the outer shell 1, and a filter plate 26 is horizontally arranged at the lower part of the powder collecting bin 25. The filter plate 26 is sealed and connected to the inner side of the powder collecting bin 25 around the periphery. A section of the powder collecting bin 25 below the filter plate 26 is connected to the negative pressure source, and the upper part of the powder collecting bin 25 is connected to the lower part of the powder suction frame 24 through a hose.

[0082] In order to optimize the product structure and avoid the transmission structure being exposed, a buckle cover 27 is detachably provided on the outer side of the housing 1, and the upper linkage component and the lower linkage component are both located in the buckle cover 27, and the upper linkage shaft 7, the upper translation shaft 8, the lower linkage shaft 12 and the upper translation shaft 8 are all rotatably provided on the buckle cover 27;

[0083] A drive shaft 28 is vertically rotatably arranged in the buckle cover 27 , and the drive shaft 28 is transmission-connected with the upper linkage shaft 7 and the lower linkage shaft 12 through a worm gear mechanism.

[0084] During crushing, the distance between the two upper rollers 2 is adjusted so that the two upper guide plates 20 clamp the strip-shaped waste vanadium-titanium denitration catalyst monomers. The two upper rollers 2 rotate inward to initially crush the strip-shaped waste vanadium-titanium denitration catalyst monomers. The initially crushed catalyst monomers enter between the two lower rollers 3 of the lower layer along the middle guide plate 5 below the upper roller 2 for further crushing until they enter between the two lower rollers 3 at the bottom and are crushed into the final flake material. The powdery ash that falls after crushing is sucked into the powder suction frame 24 and collected in the powder collection bin 25. The magnetic impurities that fall when the waste vanadium-titanium denitration catalyst monomers are crushed adhere to the lower roller 3 and move upward with the rotation of the magnet roller 4, passing through the gap between the middle guide plate 5 and the lower roller 3, and are finally scraped off by the scraper 6.

[0085] The present invention crushes the waste vanadium-titanium denitration catalyst monomer into flakes, and then pickles and dries them. The conventional recycling method is to directly crush them into powders. Not only is it difficult to remove impurities from the powders, but the loss rate of the powders during pickling is also high. The impurities are attached to the outside of the waste vanadium-titanium denitration catalyst. After being crushed into flakes, the impurities are attached to the outside of the flakes. Whether it is the impurities that fall during crushing or the impurities that fall during pickling, their volume is much smaller than the volume of the flakes, so it is easy to separate the impurities. The flakes are large in volume and are not easily washed away by the acid solution during pickling. Therefore, the larger the volume of the flakes, the less the loss during pickling.

[0086] The crusher of the present invention crushes the strip-shaped waste vanadium-titanium denitration catalyst monomers by graded pressing, which can ensure that the strip-shaped waste vanadium-titanium denitration catalyst monomers will not have a large position state deviation during crushing, so that the volume of the obtained flake material is larger. In addition, powdery ash and magnetic impurities are removed while crushing, simplifying the process flow and improving production efficiency; and when removing the powdery ash by suction, the flake material obtained by crushing will enter between the two lower pressing rollers 3 longitudinally downward along the middle guide plate 5, avoiding being crushed after entering the two lower pressing rollers 3 horizontally, so as to reduce the volume of the flake material.

[0087] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst, characterized in that: The following steps are involved: A. Surface pretreatment: cleaning the surface of the whole module of the waste vanadium-titanium denitration catalyst, and then removing the outer body of the whole module after cleaning to obtain the strip-shaped waste vanadium-titanium denitration catalyst monomer; B. Pore impurity treatment: the waste vanadium-titanium denitration catalyst monomer in step A is crushed by a crusher, and the powdery ash and magnetic impurities therein are removed after crushing to obtain a flake material; C. Pickling and drying: Spread the sheet material in step B flatly, spray and rinse it with 2% dilute sulfuric acid and pure water in sequence, and then dry it; D. Raymond ultrafine grinding: grind the flake material after pickling and drying in step C into micro powder with a particle size of less than 25 μm in an ultrafine grinder to obtain anatase coarse powder; The crusher in step B comprises a shell (1), an upper pressure roller group and a lower pressure roller group, the shell (1) is in the shape of a rectangular shell with upper and lower ends open, the upper pressure roller group is located at the upper part of the shell (1), and a plurality of groups of lower pressure roller groups are arranged in an array below the upper pressure roller group; The upper pressing roller group comprises two upper pressing rollers (2) which rotate synchronously in opposite directions, and the two upper pressing rollers (2) translate synchronously in opposite directions; The lower pressure roller group comprises two lower pressure roller components, the lower pressure roller components comprise a lower pressure roller (3) and a magnet roller (4), the magnet roller (4) coaxially rotates and sleeves inside the lower pressure roller (3), the lower pressure roller (3) is made of a non-magnetic material, and the magnet roller (4) is made of a magnetic material, the two lower pressure rollers (3) of the same lower pressure roller group rotate synchronously in opposite directions and translate synchronously in opposite directions, and the lower pressure roller (3) and the magnet roller (4) of the same lower pressure roller component rotate synchronously in opposite directions; A middle guide plate (5) is provided between the upper pressure roller (2) and the uppermost lower pressure roller (3) and between two upper and lower adjacent lower pressure rollers (3); the upper end of the middle guide plate (5) is hinged to the adjacent upper pressure roller (2), and the two sides of the lower end are hinged to the two sides of the upper part of the adjacent lower pressure roller (3); a gap is formed between the middle part of the lower end of the middle guide plate (5) and the adjacent lower pressure roller (3); A scraper (6) is provided at the lower outer portion of the lower pressure roller (3), and the scraper (6) is arranged radially along the lower pressure roller (3), with the upper end of the scraper (6) being tangent to the circumferential outer wall of the lower pressure roller (3) and the lower end extending obliquely downward; The upper pressure roller assembly further comprises an upper linkage component, wherein the upper linkage component comprises an upper linkage shaft (7), an upper translation shaft (8) and an upper linkage seat (9); The end of the upper pressure roller (2) protrudes from the outer shell (1) and is fixedly sleeved with an upper worm gear (10); the upper linkage seat (9) is fixedly rotatably provided with an upper worm sleeve (11); the upper linkage shaft (7) and the upper translation shaft (8) are both horizontally rotatably provided outside the outer shell (1); the upper worm sleeve (11) is axially slidably sleeved on the upper linkage shaft (7) and is meshed with the upper worm gear (10); the upper portion of the upper linkage seat (9) is rotatably sleeved on a section of the upper pressure roller (2) protruding from the outer shell (1), and the lower portion is threadedly sleeved on the upper translation shaft (8).

2. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 1, characterized in that: The lower pressure roller assembly further comprises a lower linkage component, wherein the lower linkage component comprises a lower linkage shaft (12), a lower translation shaft (13) and a lower linkage seat (14); The end of the lower pressure roller (3) extends out of the housing (1) and is fixedly sleeved with a lower worm gear (15) and a driving gear (16); the end of the magnet roller (4) extends out of the housing (1) and the lower pressure roller (3) and is fixedly sleeved with a driven gear ring (17); the driven gear ring (17) is coaxially arranged with the driving gear (16); the lower linkage seat (14) is fixedly rotatably arranged with a lower worm sleeve (18); the lower linkage shaft (12) and the lower translation shaft (13) are both horizontally rotatably arranged outside the housing (1); The lower worm sleeve (18) is axially slidably sleeved on the lower linkage shaft (12) and meshes with the lower worm wheel (15); the lower portion of the lower linkage seat (14) is rotatably sleeved on a section of the lower pressure roller (3) extending out of the housing (1), and the lower portion is threadably sleeved on the lower translation shaft (13); the lower linkage seat (14) is rotatably provided with a plurality of transmission gears (19); the transmission gears (19) are located between the driving gear (16) and the driven gear ring (17) and are transmission meshed with the driving gear (16) and the driven gear ring (17).

3. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 1, characterized in that: An upper guide plate (20) is provided on the upper part of the upper pressure roller (2), and the upper guide plate (20) is slidably arranged on the outer shell (1) in a transverse manner, and the lower end of the upper guide plate (20) slides against the circumferential outer wall of the upper pressure roller (2); Upper positioning plates (21) are rotatably sleeved at both ends of the upper pressure roller (2), and the upper positioning plates (21) are slidably fitted to the inner side of the outer shell (1). Both sides of the lower end of the upper guide plate (20) are respectively fixedly connected to the two upper positioning plates (21).

4. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 3, characterized in that: The two ends of the lower pressure roller (3) are rotatably sleeved with lower positioning plates (22), and the lower positioning plates (22) are slidably fitted to the inner side of the outer shell (1); Both sides of the upper end of the middle guide plate (5) are respectively hinged to the lower parts of two adjacent upper positioning plates (21), and both sides of the lower end of the middle guide plate (5) are respectively hinged to the upper parts of two adjacent lower positioning plates (22); The two sides of the scraper (6) are respectively fixedly connected to two lower positioning plates (22) at the two ends of the corresponding lower pressure roller (3).

5. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 4, characterized in that: The lower positioning plate (22) is provided with a telescopic plate (23) at the upper and lower parts thereof. The telescopic plate (23) is radially slidably arranged in the lower positioning plate (22) along the lower pressure roller (3). The middle guide plate (5) is hinged to one end of the telescopic plate (23) extending outward from the lower positioning plate (22); An angle is formed between the two telescopic plates (23) at the upper and lower parts of the lower positioning plate (22), and the angle is 180°.

6. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 1, characterized in that: The crusher comprises a powder suction component, wherein the powder suction component comprises a powder suction frame (24), wherein the powder suction frame (24) is in the shape of a sealed shell with one end open, wherein the opening of the powder suction frame (24) is sealedly connected to the outside of the middle guide plate (5), wherein the area of ​​the middle guide plate (5) located within the powder suction frame (24) is uniformly distributed with micropores, and the powder suction frame (24) is connected to a negative pressure source.

7. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 6, characterized in that: A powder collecting bin (25) is arranged in the housing (1), a filter plate (26) is arranged transversely at the lower part of the powder collecting bin (25), the filter plate (26) is sealedly connected to the inner side of the powder collecting bin (25) at its periphery, a section of the powder collecting bin (25) located below the filter plate (26) is connected to a negative pressure source, and the upper part of the powder collecting bin (25) is connected to the lower part of the powder suction frame (24) via a hose.

8. The method for extracting anatase coarse powder using waste vanadium-titanium denitration catalyst according to claim 1, characterized in that: A buckle cover (27) is detachably provided on the outer side of the housing (1); the upper linkage component and the lower linkage component are both located inside the buckle cover (27); and the upper linkage shaft (7), the upper translation shaft (8), and the lower linkage shaft (12) are all rotatably provided on the buckle cover (27); A drive shaft (28) is vertically rotatably arranged inside the buckle cover (27), and the drive shaft (28) is transmission-connected to the upper linkage shaft (7) and the lower linkage shaft (12) via a worm gear mechanism.

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