A zinc oxide powder crushing and drying device

Abstract

The invention relates to the technical field of zinc oxide processing, and specifically discloses a zinc oxide powder crushing and drying device, comprising a drying cylinder and a sieve cylinder which are arranged concentrically, a discharging guide hopper being arranged at the lower end of the drying cylinder, a feeding cylinder being arranged inside the sieve cylinder along the central axis, an outer end of the feeding cylinder extending out of the drying cylinder being connected to a feeding hopper, an auger spiral blade being arranged inside the feeding cylinder, a feeding channel being arranged at the lower end of the feeding cylinder located in the sieve cylinder, a hot air jacket being arranged outside the feeding cylinder, a hot air source being connected to the outer end of the hot air jacket, hot air discharge holes being arranged on the hot air jacket located in the sieve cylinder, a plurality of material shifting plates being evenly arranged circumferentially on the inner wall of the sieve cylinder, steel balls being arranged in the sieve cylinder, and a magnetic strip being arranged on the inner wall of the drying cylinder; the zinc oxide powder crushing and drying device disclosed by the invention not only has both the crushing and drying functions, but also has excellent processing speed and processing effect on agglomerated zinc oxide.

Description

Technical Field

[0001] The invention relates to the technical field of zinc oxide processing, and in particular discloses a zinc oxide powder crushing and drying device. Background Art

[0002] The preparation process of zinc oxide is divided into two routes: dry process and wet process. However, the final zinc oxide products need to be dried to powder and packaged for sale. However, during the storage of zinc oxide, the zinc oxide will be damp due to the humid environment. In addition, the stacking and pressing of bagged zinc oxide will often cause zinc oxide to clump. The damp and agglomerated zinc oxide does not affect its physical and chemical properties, but it needs to be crushed and dried before being sold. At present, the industry treats damp and agglomerated zinc oxide by first crushing it with a crusher, and then sending it to the drying equipment for hot air drying. This means that the treatment of zinc oxide not only requires the use of two sets of equipment, but also the crushed and dried zinc oxide is difficult to achieve a good powder state.

[0003] For example, the related patents applied by our company, the invention patent with application number 202410875315.4, discloses a drying device for the preparation of zinc oxide, including a base and a drying cylinder, a drying cylinder is arranged above the base, a drying tube is arranged inside the drying cylinder, the two ends of the drying tube are respectively connected with an air supply mechanism and a pulse mechanism, a power mechanism is arranged on one side of the drying cylinder, and a position adjustment mechanism is arranged at both ends of the base, the drying cylinder includes a shell, a toggle rod, a first cover, a second cover, a connecting ring and a limit rod, the drying tube includes a first connecting member, a second connecting member and a first bracket, the air supply mechanism includes a third connecting member, an air supply pipe and a hot air blower, the pulse mechanism includes a fourth connecting member and a pulse valve, and the power mechanism includes a motor, a connector and a flat belt. The drying device adopts the working principle of a drum dryer, so that it can avoid zinc oxide powder and particles blocking the air outlet during the drying process of zinc oxide, and facilitate the cleaning and maintenance of various components. However, when the drying device is used to dry the agglomerated zinc oxide, on the one hand, the zinc oxide material cannot be crushed online, and agglomerates still exist after drying. On the other hand, during the rotation of the drying cylinder, the zinc oxide material is always accumulated at the bottom thereof and cannot be fully contacted with the hot air, thereby affecting its drying effect and drying speed. Therefore, in view of the above-mentioned shortcomings of the existing drying device for preparing zinc oxide, the present application proposes a zinc oxide powder crushing and drying device that can effectively solve the above-mentioned problems, so as to realize the rapid treatment of agglomerated zinc oxide during storage. Summary of the invention

[0004] The present invention aims to provide a zinc oxide powder crushing and drying device to achieve synchronous crushing and drying of damp and agglomerated zinc oxide, so that the processed zinc oxide can be dried into powder and the crushing and drying efficiency and drying effect of the zinc oxide are improved.

[0005] The present invention is achieved through the following technical solutions: A zinc oxide powder crushing and drying device comprises a drying cylinder and a sieve cylinder which are arranged concentrically, the sieve cylinder being rotatably arranged inside the drying cylinder, a discharging guide hopper being arranged at the lower end of the drying cylinder, a feeding cylinder being arranged inside the sieve cylinder along the central axis, an outer end of the feeding cylinder extending out of the drying cylinder being connected to a feeding hopper, an auger spiral blade being arranged inside the feeding cylinder, and a feeding motor being connected to the end of the auger spiral blade, a material discharge channel being arranged at the lower end of the feeding cylinder located in the sieve cylinder, a hot air jacket being arranged outside the feeding cylinder, a hot air source being connected to the outer end of the hot air jacket, and a row of hot air discharge holes being provided on the hot air jacket located in the sieve cylinder; A plurality of material stripping plates are evenly arranged circumferentially on the inner wall of the sieve cylinder, steel balls are arranged in the sieve cylinder, magnetic strips for magnetically attracting the steel balls are arranged on the inner wall of the drying cylinder, an exhaust pipe is connected to the top of the drying cylinder, a filter box is connected to the end of the exhaust pipe, and an exhaust device is connected to the other end of the filter box.

[0006] As a further configuration of the above scheme, a row of bent rake teeth are provided at the radial inner end of the material stripping plate, and tooth comb holes are formed between adjacent rake teeth. A row of steel ball rolling grooves are opened on the surface of the material stripping plate, and the ends of the steel ball rolling grooves extend to the position of the rake teeth.

[0007] As a further configuration of the above scheme, the magnetic strip is fixedly arranged on the inner wall of the drying drum at an angle, and the angle between the starting point of the magnetic strip and the horizontal line is 0°, and the angle between the end point and the horizontal line is set between 30 and 45°.

[0008] As a further configuration of the above scheme, it also includes a box seat, the drying cylinder is fixedly arranged at the upper end of the box seat, the discharge guide hopper extends to the interior of the box seat, and an inclined side discharge guide groove is arranged in the box seat directly below the discharge guide hopper.

[0009] As a further arrangement of the above scheme, roller track rings are provided on the outer circular surfaces at both ends of the sieve cylinder, sieve holes are opened on the sieve cylinder between the two roller track rings, and support wheels that act on the roller track rings are provided on the upper surfaces of the box seats on both sides of the drying cylinder.

[0010] As a further configuration of the above solution, a power shaft extending out of the drying cylinder is arranged at the center of the end surface of the drying cylinder, and the outer end of the power shaft is connected to a driving assembly.

[0011] As a further configuration of the above solution, a hot air connecting pipe is connected to the hot air jacket located outside the drying cylinder, and an air supply pipe is connected between the hot air connecting pipe and the hot air source.

[0012] As a further configuration of the above solution, a filtering layer and a drying layer are provided inside the filtering box.

[0013] During the operation of the zinc oxide powder crushing and drying device disclosed in the present invention, the zinc oxide material is put into the feeding hopper, and then the zinc oxide is transported by the combined action of the spiral blades of the auger and the feeding barrel, and the agglomerated zinc oxide is initially squeezed and crushed during the transportation process. At the same time, the high-temperature gas generated by the hot air source is fed into the hot air jacket, and then flows along the axial direction of the hot air jacket, and the zinc oxide in the feeding barrel is heated and dried during the flow process.

[0014] Then the material is discharged from the discharge channel and falls on the bottom of the sieve tube. Some fine zinc oxide powder passes through the sieve holes and falls into the drying tube smoothly, and then is discharged from the drying tube from the discharge guide hopper. Some broken zinc oxide rotates with the rotation of the sieve tube, and is rotated and lifted upward together with the steel balls under the action of the material-diverting plate, and the steel balls can crush the broken zinc oxide in the process of rolling on the material-diverting plate. When the material-diverting plate rotates beyond the horizontal line, the zinc oxide and the steel balls will slip off the material-diverting plate, and then fall in the sieve tube. At the same time, the hot air discharge holes on the hot air jacket will discharge the high-temperature gas, which will contact with the zinc oxide and steel balls in the falling process after discharge, so as to achieve heating and drying of the zinc oxide. After contacting with the hot air, the steel balls will continuously absorb heat to increase their own temperature. The high-temperature steel balls will also continuously contact with the zinc oxide in the subsequent process, so as to further heat the zinc oxide and achieve rapid evaporation of the water in the zinc oxide. The evaporated water will enter the exhaust pipe with the air flow, and then be filtered and treated by the filter box before being discharged. The above-mentioned actions are repeated in this cycle until the zinc oxide in pieces is completely broken up and the surface moisture is evaporated and removed to form powder, so that the processed zinc oxide can completely pass through the sieve holes and be discharged from the entire drying device.

[0015] In addition, due to the effect of the magnetic strips in the drying cylinder of the present invention, the steel balls will not fall after the material-diverting plate rotates beyond the horizontal position, so that the broken zinc oxide first falls to the bottom of the sieve cylinder, and the steel balls will fall after the steel balls and the magnetic strips are misaligned, thereby hitting the zinc oxide on the upper layer, thereby improving the crushing effect of the steel balls on the zinc oxide, so that it can be quickly processed into powder.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The zinc oxide powder crushing and drying device disclosed in the present invention can, on the one hand, perform primary heating, drying and extrusion crushing by high-temperature gas in a hot air jacket during zinc oxide transportation, and on the other hand, can be scraped up by a material stripping plate during the rotation of a sieve cylinder, and then contact with hot air during the falling process to achieve secondary heating and drying, and perform secondary crushing by the impact of falling steel balls. Through the two heating, drying and crushing processes, agglomerated zinc oxide can be quickly processed into a dry powder, and finally discharged after being screened by the sieve cylinder and qualified. The entire device not only has both crushing and drying functions, but also has excellent processing speed and effect on agglomerated zinc oxide.

[0017] The zinc oxide powder crushing and drying device disclosed in the present invention not only utilizes the steel balls to impact the agglomerated zinc oxide during the falling process, thereby improving the crushing processing efficiency, but also the steel balls can absorb the heat of hot air to keep themselves in a high temperature state, so that the steel balls can be fully heated and dried during the long-term contact with the zinc oxide, thereby improving the drying speed. In addition, the magnetic strips on the inner wall of the drying cylinder can provide magnetic attraction to the steel balls, so that after the material-diverting plate rotates beyond the horizontal line, the agglomerated zinc oxide can first slide off the material-diverting plate, and then the steel balls can fall on the surface of the agglomerated zinc oxide on the upper layer of the bottom of the sieve tube for crushing. At the same time, due to the design of the steel ball rolling groove and the inclined magnetic strips, a row of steel balls on the material-diverting plate will fall down in sequence at different heights, crushing the agglomerated zinc oxide at different positions at the bottom of the sieve tube, making the crushing of zinc oxide more uniform, thereby improving the processing effect of crushing and drying zinc oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the back three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the internal planar structure in the present invention from a side view; Figure 4 It is a schematic diagram of the main internal three-dimensional structure of the present invention; Figure 5 It is a schematic diagram of the internal structure of the drying cylinder, the sieve cylinder, the feeding cylinder, etc. in the present invention; Figure 6 It is a schematic diagram of the internal structure of the feeding cylinder, hot air jacket, etc. in the present invention; Figure 7For the present invention Figure 4 Schematic diagram of the enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 7 , and describes the application in detail with reference to embodiments. Example 1

[0022] Example 1 discloses a zinc oxide powder crushing and drying device, see attached Figure 1-4 The main body of the device includes a box seat 1, a drying cylinder 2, a hot air source 3 and a feeding hopper 4. The drying cylinder 2 is fixedly arranged at the upper end of the box seat 1, and a discharge guide hopper 5 extending into the interior of the box seat 1 is arranged at the lower end of the drying cylinder 2, and then an inclined side discharge guide groove 6 is arranged in the box seat 1 directly below the discharge guide hopper 5.

[0023] A sieve cylinder 7 is coaxially arranged in the drying cylinder 2, and roller track rings 8 are fixedly arranged on the outer circumference of both ends of the sieve cylinder 7, and then a large number of sieve holes 701 are evenly opened on the outer circumference of the sieve cylinder 7 between the two roller track rings 8. A power shaft 9 extending out of the drying cylinder 2 is arranged at the center of one end face of the sieve cylinder 7, and a bearing 10 connected to the power shaft 9 is arranged at the center of the end face of the drying cylinder 2, and then a driving assembly 11 is connected to the outer end of the power shaft 9 extending out of the bearing 10, and the specific driving assembly can adopt a motor direct drive or a motor + transmission belt or a motor + gear and other driving methods. Wheel seats 12 are arranged on the upper surface of the box seat 1 on both sides of the drying cylinder 2, and then a support wheel 13 extending into the drying cylinder 2 and interacting with the roller track ring 8 is rotatably connected in each wheel seat 12. When the driving assembly 11 outputs power, under the action of the support wheel 13 and the roller track ring 8, the sieve cylinder 7 can be stably rotated at the center of the interior of the drying cylinder 2.

[0024] Reference Figure 4 and attached Figure 6A through hole is provided at the center of the end face of the sieve hole cylinder 7 on the opposite side of the power shaft 9, and a feed cylinder 14 is passed through the through hole and arranged along the central axis, and the outer end of the feed cylinder 14 extends out of the sieve hole cylinder 7 and the drying cylinder 2, and then the feeding hopper 4 is connected to the upper surface of the outer end of the feed cylinder 14. An auger spiral blade 15 is provided inside the feed cylinder 14, and a feeding motor 16 connected to the auger spiral blade 15 is provided on the outer end face of the feed cylinder 14, and then a feeding channel 17 aligned with the sieve hole 701 is provided on the lower surface of the inner end of the feed cylinder 14. A hot air jacket 18 is provided on the periphery of the feed cylinder 14, and the hot air jacket 18 is fixedly connected to the position extending out of the drying cylinder 2. A hot air pipe 181 is provided on the lower surface of the outer end of the hot air jacket 18, and then the hot air pipe 181 is connected to the hot air source 3 through the air supply pipe 19. The specific hot air source 3 can be a biomass combustion furnace or a hot air blower, etc. Finally, a row of hot air discharge holes 182 arranged horizontally toward the inner wall of the sieve tube 7 are opened on one side end of the hot air jacket 18 located in the sieve tube 7. During operation, the auger spiral blades 15 in the feeding tube 14 can transport the zinc oxide, and the high-temperature airflow introduced into the hot air jacket 18 can heat the zinc oxide during transportation. In order to achieve the crushing and effective drying of the agglomerated zinc oxide, three or four radially arranged material removal plates 20 are evenly arranged on the inner wall of the drying tube 2, and a certain number of steel balls 21 are arranged inside the drying tube 2 (refer to the attached Figure 3 ).

[0025] Finally, an exhaust pipe 22 is connected to the top of the drying cylinder 2, and the end of the exhaust pipe 22 is connected to a filter box 23. The filter box 23 is provided with corresponding filter layers and drying layers. Finally, an exhaust device 24 is connected to the other end of the filter box 23. The specific exhaust device 24 can be an exhaust pump or an exhaust fan.

[0026] During the operation of the zinc oxide powder crushing and drying device disclosed in the present embodiment 1, the zinc oxide material is put into the feeding hopper 4, and the zinc oxide is transported while the agglomerated zinc oxide is squeezed and crushed under the action of the feeding cylinder 14 and the auger spiral blades 15. At the same time, the high-temperature gas is sent into the hot air jacket 18 through the air supply pipe 19, so that the hot air jacket 18 heats the zinc oxide during the transportation process.

[0027] After the zinc oxide is discharged from the discharge channel 17, it will fall into the mesh cylinder 7. Due to the heating process during the transportation process, the scattered and fine zinc oxide can be quickly dried and fall into the bottom of the drying cylinder 2 through the mesh 701, and finally discharged through the discharge guide hopper 5 and the discharge guide groove 6. Some broken pieces of zinc oxide are picked up by the material-discharging plate 20 together with the steel balls 21 during the rotation of the mesh cylinder 7. During the upward rotation of the material-discharging plate 20, the steel balls 21 will roll along the upper surface of the material-discharging plate 20, further crushing the broken pieces of zinc oxide, and then fall off the material-discharging plate 20 together. In the process of falling together, the broken zinc oxide and the steel balls 21 will be fully in contact with the hot air sent out from the hot air discharge holes 182 to achieve heating and drying. Then, when they fall to the bottom of the sieve tube 7 together, they will be impacted by the steel balls 21 to achieve full crushing. At the same time, the heat absorbed by the steel balls 21 can be transferred to the zinc oxide material during the rotation process, thereby achieving full crushing and drying of the blocky zinc oxide until it can be discharged from the box seat 1 through the sieve holes 701. Example 2

[0028] Example 2 discloses a zinc oxide powder crushing and drying device that is further improved based on the technical solution in Example 1, and the similarities between it and Example 1 are not described again.

[0029] Reference Figure 3 , Attachment Figure 5 and attached Figure 7 In this embodiment 2, a row of bent rake teeth 25 are arranged at the radial inner end of each material stripper plate 20, and tooth comb holes 251 of a size similar to the sieve holes 701 are formed between adjacent rake teeth 25, and then a row of steel ball rolling grooves 201 are opened on the surface of the material stripper plate 20, and the ends of the steel ball rolling grooves 201 extend to the positions of the rake teeth 25. At the same time, a magnetic strip 26 for adsorbing the steel balls 21 is arranged in the drying cylinder 2, and the magnetic strip 26 is fixedly arranged on the inner wall of the drying cylinder 2, and the angle between the starting point and the horizontal line is 0°, and the angle between the end point and the horizontal line is set between 30° and 45°.

[0030] In the present embodiment 2, through the above-mentioned improved design, when the material-selecting plate 20 rotates upward from the bottom of the sieve tube 7, some finely crushed zinc oxide will leak out from the tooth comb holes 251, and the crushed zinc oxide and steel balls 21 will rotate upward from the bottom under the action of the material-selecting plate 20, and at the same time, due to the design of the steel ball rolling groove 201, the steel balls 21 are generally in the steel ball rolling groove 201. When the material-selecting plate 20 reaches the horizontal position, the zinc oxide on its upper surface begins to slide down, and in the process of falling, it is directly in contact with the hot air to achieve drying, and due to the adsorption effect of the magnetic strip 26 on the steel balls 21, the zinc oxide will fall completely, and at the same time, the steel balls 21 will fall down under the action of gravity after the corresponding areas of the magnetic strip 26 are misaligned, and directly hit the agglomerated upper zinc oxide, so that the agglomerated zinc oxide is fully broken after being heated. In addition, due to the inclined design of the magnetic strip 26 in this embodiment 2, a row of steel balls 21 on the material plate 20 will begin to fall at different heights, so that a row of steel balls 21 can fall down one after another, breaking up the agglomerated zinc oxide at different positions on the bottom of the sieve tube 7, making the crushing of the zinc oxide more uniform.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A zinc oxide powder crushing and drying device, comprising a drying cylinder and a sieve cylinder arranged concentrically, wherein the sieve cylinder is rotatably arranged inside the drying cylinder, and a discharge guide hopper is arranged at the lower end of the drying cylinder, characterized in that: A feeding cylinder is arranged along the central axis of the sieve cylinder, the outer end of the feeding cylinder extending out of the drying cylinder is connected to a feeding hopper, an auger spiral blade is arranged inside the feeding cylinder, and the end of the auger spiral blade is connected to a feeding motor, a feeding channel is arranged at the lower end of the feeding cylinder located in the sieve cylinder, a hot air jacket is arranged outside the feeding cylinder, a hot air source is connected to the outer end of the hot air jacket, and a row of hot air discharge holes is provided on the hot air jacket located in the sieve cylinder; A plurality of material stripping plates are evenly arranged circumferentially on the inner wall of the sieve cylinder, steel balls are arranged in the sieve cylinder, magnetic strips for magnetically attracting the steel balls are arranged on the inner wall of the drying cylinder, an exhaust pipe is connected to the top of the drying cylinder, a filter box is connected to the end of the exhaust pipe, and an exhaust device is connected to the other end of the filter box.

2. The zinc oxide powder crushing and drying device according to claim 1, characterized in that: A row of bent rake teeth is arranged at the radial inner end of the material stripping plate, and tooth comb holes are formed between adjacent rake teeth. A row of steel ball rolling grooves is opened on the surface of the material stripping plate, and the ends of the steel ball rolling grooves extend to the positions of the rake teeth.

3. The zinc oxide powder crushing and drying device according to claim 2, characterized in that: The magnetic strip is fixedly arranged on the inner wall of the drying drum at an angle, and the angle between the starting point of the magnetic strip and the horizontal line is 0°, and the angle between the end point and the horizontal line is set between 30° and 45°.

4. The zinc oxide powder crushing and drying device according to claim 1, characterized in that: It also includes a box seat, the drying cylinder is fixedly arranged at the upper end of the box seat, the discharge guide bucket extends to the interior of the box seat, and an inclined side discharge guide groove is arranged in the box seat directly below the discharge guide bucket.

5. The zinc oxide powder crushing and drying device according to claim 4, characterized in that: Roller track rings are arranged on the outer circumferential surfaces at both ends of the sieve cylinder, sieve holes are opened on the sieve cylinder between the two roller track rings, and supporting wheels that interact with the roller track rings are arranged on the upper surfaces of the box seats on both sides of the drying cylinder.

6. The zinc oxide powder crushing and drying device according to claim 5, characterized in that: A power shaft extending out of the drying cylinder is arranged at the center of the end surface of the drying cylinder, and a driving assembly is connected to the outer end of the power shaft.

7. The zinc oxide powder crushing and drying device according to claim 1, characterized in that: A hot air connecting pipe is connected to the hot air jacket located outside the drying cylinder, and an air supply pipe is connected between the hot air connecting pipe and the hot air source.

8. The zinc oxide powder crushing and drying device according to claim 1, characterized in that: The filter box is provided with a filter layer and a drying layer inside.

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