A fly ash feeding dry granulation device

Abstract

The utility model discloses a fly ash feeding dry process granulation device, including support board, support board top fixed connection granulation bin, the top fixed connection of granulation bin bin, the top fixed connection of bin bin mixes material bin, and the top installation of mixing material bin installs the mixing material mechanism, sets up the feeding mechanism in bin, and the first material guide block is fixedly connected to the both sides inner wall of granulation bin, and the bottom fixed connection of first material guide block leads material board, and the bottom of material board is set up and leads the mouth of material, and the roller pressure mechanism, crushing mechanism and whole particle mechanism are set up respectively above and below material board, and the bottom fixed connection of support board installs the supporting plate, and the top fixed connection of supporting plate installs the material collecting groove, and the top installation of material collecting groove installs the sieve plate, and the sieve hole is set up in the bottom of sieve plate. The utility model can mix fly ash and medicament powder fully and evenly before granulating, prevent local fly ash from not being effectively stabilized, can control and adjust fly ash particle size after granulating according to need, so that different fly ash processing needs are satisfied.

Description

Technical Field

[0001] This utility model belongs to the field of fly ash treatment technology, and in particular relates to a fly ash feeding dry granulation device. Background Technology

[0002] In the industrial sector, fly ash specifically refers to the fine ash collected from flue gas purification systems (such as bag filters) after waste is burned in waste-to-energy plants. Fly ash is a hazardous waste because it contains harmful substances such as dioxins, heavy metals (such as lead, cadmium, and mercury), and soluble salts. It cannot be directly landfilled and must undergo stabilization / solidification treatment. Dry granulation does not require the addition of any liquid (such as water) for granulation. Instead, it directly compresses dry powder material into dense flakes or blocks using mechanical pressure (such as roller extrusion), followed by crushing and granulation to finally form granules. Therefore, it can be used for fly ash treatment.

[0003] A search revealed a dry granulation device for ceramic blanks with publication number CN221066659U on the Chinese Patent website. This dry granulation device can be used for fly ash treatment, but it has some defects and shortcomings that need to be improved: (1) Some existing dry granulation devices lack effective mixing measures. Before dry granulation of fly ash, it is often difficult to mix fly ash with additives such as curing agents (such as cement and chelating agents) and co-solvents evenly, resulting in local fly ash not being effectively stabilized, which in turn increases the risk of leaching of pollutants such as heavy metals; (2) Due to structural design reasons, some existing dry granulation devices are difficult to control and adjust the particle size of fly ash particles after dry granulation as needed, thus failing to meet different fly ash treatment requirements and limiting their applicability. Therefore, in view of the above problems, the fly ash feeding dry granulation device provided by this utility model is of great significance. Utility Model Content

[0004] This invention provides a dry granulation device for fly ash feeding. This device can process fly ash into regular particles with uniform particle size and high mechanical strength, so that it can be stabilized and solidified. Before granulation, the fly ash and reagent powder can be stirred by the mixing mechanism to ensure that they are fully and uniformly mixed, thereby ensuring that each fly ash particle can come into contact with the reagent and preventing the risk of leaching of heavy metals and other pollutants due to ineffective stabilization of local fly ash. By unscrewing the second nut, the support plate and the screen plate can be removed from the granulation chamber together. At this time, the screen plate can be removed from the top of the collection trough by pulling out the insertion rod, so as to replace the screen plate with a screen plate with a different aperture. This allows the particle size of the granulated fly ash particles to be controlled and adjusted as needed to meet different fly ash treatment requirements, thereby greatly expanding the application range of the device and solving the problems in the background technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model discloses a dry granulation device for fly ash feeding, comprising a support plate, several support legs fixedly connected to the bottom of the support plate, and a granulation hopper fixedly connected to the top of the support plate. The bottom of the granulation hopper is open at the connection with the support plate, and a feeding hopper is fixedly connected to the top of the granulation hopper. A mixing hopper is fixedly connected to the top of the feeding hopper, and a discharge valve is installed at the bottom of the mixing hopper. A top cover is installed on the top cover, and a mixing mechanism is installed on the top cover. The feeding hopper is L-shaped. The bottom end is connected to the inner cavity of the granulation chamber, and a feeding mechanism is provided in the feeding chamber. The inner walls on both sides of the granulation chamber are fixedly connected to a first guide block. A guide plate is fixedly connected to the bottom of the first guide block. Several guide ports are opened at the bottom of the guide plate. A roller pressing mechanism, a crushing mechanism, and a granulation mechanism are respectively provided above and below the guide plate. A support plate is installed at the bottom of the support plate. A collection trough is fixedly connected to the top of the support plate. A screen plate is installed at the top of the collection trough. Several screen holes are opened at the bottom of the screen plate.

[0007] The mixing mechanism includes a first motor, which is installed on the top of the top cover. Its output shaft passes through the top cover and extends into the mixing chamber. Mixing plates are fixedly connected to both sides of the output shaft of the first motor.

[0008] The feeding mechanism includes a second motor, which is installed at one end of the feeding bin. Its output end is fixedly connected to a push rod via a coupling. The push rod is located inside the feeding bin and its body is provided with spiral protrusions.

[0009] The roller pressing mechanism includes a pair of third motors, which are installed on the rear end face of the granulation chamber. The end of the output shaft of the third motor passes through the rear end face of the granulation chamber and is fixedly connected to a pair of pressure rollers. The pair of pressure rollers are located inside the granulation chamber and above the first guide block.

[0010] The crushing mechanism includes a fourth motor, which is installed on the rear end face of the granulation chamber and located below the third motor. The end of its output shaft passes through the rear end face of the granulation chamber and is fixedly connected to a crushing rod. The crushing rod is located inside the granulation chamber and between the guide plate and the first guide block. Several sets of crushing hammers are fixedly connected to its rod body. The crushing hammers are T-shaped. Each set of crushing hammers is linearly distributed at equal intervals along the length of the crushing rod, and each set of crushing hammers is distributed in a ring at equal intervals along the circumference of the crushing rod.

[0011] The granulation mechanism includes a fifth motor, which is installed on the rear end face of the granulation chamber and located below the fourth motor. The end of its output shaft passes through the rear end face of the granulation chamber and is fixedly connected to a granulation roller. The granulation roller is located inside the granulation chamber and between the sieve plate and the guide plate. Several granulation blocks are fixedly connected to its roller body.

[0012] Furthermore, the bottom of the mixing hopper is an inverted cone shape, the mixing plate is triangular, and its sidewall surface is provided with cleaning brushes.

[0013] Furthermore, the top edge of the mixing hopper protrudes outward and has several first positioning holes. The top cover is circular, and its diameter corresponds to the top diameter of the mixing hopper. Several first studs are fixedly connected to the bottom of the top cover. The number of first studs is the same as the number of first positioning holes, and their diameter corresponds to the diameter of the first positioning holes. The center of each first stud corresponds one-to-one with the center of each first positioning hole. Each first stud is threaded with a first nut that mates with it.

[0014] Furthermore, the two pressure rollers have the same diameter and the same height, and are symmetrically distributed directly below the bottom end of the feeding hopper. The roller body surface of the pressure rollers is evenly distributed with several pit-shaped grooves.

[0015] Furthermore, the first guide block is a right-angled trapezoid with an inclined end face at the top, the guide plate is U-shaped, and the guide opening is elongated and distributed in an equidistant ring along the arc surface of the guide plate.

[0016] Furthermore, the sieve plate is arc-shaped, and a second guide block is fixedly connected to both sides of its top. The second guide block is triangular with an inclined end face at its top. Several insert rods are fixedly connected to both sides of the bottom of the sieve plate. The cross-section of the collecting trough and the granulation chamber is rectangular, and the length and width of their outer walls correspond to the length and width of the inner walls of the granulation chamber, respectively. Several slots are opened on both sides of the top of the collecting trough. The cross-section of the slots and the insert rods is circular, and they are the same in number and have the same diameter. The center of each slot corresponds one-to-one with the center of each insert rod.

[0017] Furthermore, the bottom of the support plate is fixedly connected with several second studs, and the second studs are threaded with second nuts that cooperate with them. The support plate is provided with several second positioning holes, the number of which is the same as that of the second studs, and the hole diameter is equal to the diameter of the second studs. The center of each second positioning hole corresponds one-to-one with the center of each second stud.

[0018] The present invention has the following advantages over the prior art:

[0019] (1) When using the fly ash feeding dry granulation device of the present invention, the fly ash can be processed into regular particles with uniform particle size and high mechanical strength so that it can be stabilized and solidified. Before granulation, the fly ash and the agent powder can be stirred by the mixing mechanism so that they are fully and evenly mixed, thereby ensuring that each fly ash particle can come into contact with the agent, so as to prevent the local fly ash from being effectively stabilized and thus increasing the risk of leaching of pollutants such as heavy metals;

[0020] (2) When using the fly ash feeding dry granulation device of this utility model, the pallet and the screen plate can be taken out from the granulation bin by unscrewing the second nut. At this time, the screen plate can be removed from the top of the collection trough by pulling out the plug rod so as to replace the screen plate with a screen plate with a different aperture. Thus, the particle size of the fly ash particles after granulation can be controlled and adjusted as needed to meet different fly ash treatment requirements, thereby greatly expanding the applicability of the device.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a fly ash feeding dry granulation device according to the present invention;

[0024] Figure 2 This is a front sectional view of a fly ash feeding dry granulation device according to the present invention;

[0025] Figure 3 This is a schematic diagram of the granulation chamber in this utility model;

[0026] Figure 4 This is a schematic diagram of the mixing mechanism in this utility model;

[0027] Figure 5 This is a schematic diagram of the feeding mechanism in this utility model;

[0028] Figure 6 This is a schematic diagram of the material guide plate in this utility model;

[0029] Figure 7 This is a schematic diagram of the roller pressing mechanism in this utility model;

[0030] Figure 8This is a schematic diagram of the crushing mechanism in this utility model;

[0031] Figure 9 This is a schematic diagram of the granulation mechanism in this utility model;

[0032] Figure 10 This is a schematic diagram of the material collection trough in this utility model;

[0033] Figure 11 This is a schematic diagram of the sieve plate in this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Support plate; 2. Support leg; 3. Granulation bin; 4. Feeding bin; 5. Mixing bin; 6. Discharge valve; 7. Top cover; 8. First guide block; 9. Guide plate; 10. Guide port; 11. Support plate; 12. Collection trough; 13. Screen plate; 14. Screen hole; 15. First motor; 16. Mixing plate; 17. Second motor; 18. Push rod; 19. Third motor; 20. Pressure roller; 21. Fourth motor; 22. Crushing rod; 23. Crushing hammer; 24. Fifth motor; 25. Granulating roller; 26. Granulating block; 27. Cleaning brush; 28. First positioning hole; 29. ​​First stud; 30. First nut; 31. Second guide block; 32. Insert rod; 33. Slot; 34. Second stud; 35. Second nut; 36. Second positioning hole. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0037] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Please see Figure 1-11As shown, this utility model discloses a fly ash feeding dry granulation device, including a support plate 1. Several support legs 2 are fixedly connected to the bottom of the support plate 1, and a granulation bin 3 is fixedly connected to the top of the support plate 1. The bottom of the granulation bin 3 is open at the connection point with the support plate 1. A feeding bin 4 is fixedly connected to the top of the granulation bin 3, and a mixing bin 5 is fixedly connected to the top of the feeding bin 4. The bottom of the mixing bin 5 is connected to the feeding bin 4 and is equipped with a discharge valve 6. A top cover 7 is installed on the top of the mixing bin 5, and a mixing mechanism is installed on the top cover 7. The feeding bin 4 is L-shaped, and its bottom... The end is connected to the inner cavity of the granulation chamber 3, and a feeding mechanism is provided in the feeding chamber 4. The inner walls on both sides of the granulation chamber 3 are fixedly connected to the first guide block 8. The bottom of the first guide block 8 is fixedly connected to the guide plate 9. The bottom of the guide plate 9 is provided with several guide ports 10. The top and bottom of the guide plate 9 are respectively provided with a roller pressing mechanism, a crushing mechanism and a granulation mechanism. The bottom of the support plate 1 is installed with a support plate 11. The top of the support plate 11 is fixedly connected to the collection trough 12. The top of the collection trough 12 is installed with a screen plate 13. The bottom of the screen plate 13 is provided with several screen holes 14.

[0039] The mixing mechanism includes a first motor 15, which is installed on the top of the top cover 7. Its output shaft passes through the top cover 7 and extends into the mixing chamber 5. Mixing plates 16 are fixedly connected to both sides of the output shaft of the first motor 15. When fly ash and additives such as curing agent and co-solvent are introduced into the mixing chamber 5 according to the preset ratio, the first motor 15 can be driven to drive the mixing plates 16 to rotate. When the mixing plates 16 rotate, they can stir the fly ash and chemical powder in the mixing chamber 5 to make them fully and evenly mixed, thereby ensuring that each fly ash particle can come into contact with the chemical agent, so as to prevent the risk of leaching of heavy metals and other pollutants from local fly ash not being effectively stabilized.

[0040] The feeding mechanism includes a second motor 17, which is installed at one end of the feeding hopper 4. Its output end is fixedly connected to a push rod 18 via a coupling. The push rod 18 is located inside the feeding hopper 4 and has spiral protrusions on its body. By opening the discharge valve 6, the uniformly mixed fly ash and pharmaceutical powder can be introduced into the feeding hopper 4. At this time, driving the second motor 17 can make it rotate the push rod 18. When the push rod 18 rotates, the spiral protrusions on its body can push the fly ash and pharmaceutical powder to move until they are introduced into the granulation hopper 3.

[0041] The roller pressing mechanism includes a pair of third motors 19, which are installed on the rear end face of the granulation chamber 3. The output shaft of the third motor 19 passes through the rear end face of the granulation chamber 3 and is fixedly connected to the counter-pressure rollers 20. The counter-pressure rollers 20 are located inside the granulation chamber 3 and above the first guide block 8. By driving the two third motors 19, the two counter-pressure rollers 20 can be driven to rotate synchronously in opposite directions. When fly ash and pharmaceutical powder enter the granulation chamber 3 and fall into the tiny gap between the two counter-pressure rollers 20, they can be pressed into hard thin sheets by the huge pressure applied by the counter-pressure rollers 20.

[0042] The crushing mechanism includes a fourth motor 21, which is installed on the rear end face of the granulation chamber 3 and located below the third motor 19. The end of its output shaft passes through the rear end face of the granulation chamber 3 and is fixedly connected to a crushing rod 22. The crushing rod 22 is located inside the granulation chamber 3 and between the guide plate 9 and the first guide block 8. Several sets of crushing hammers 23 are fixedly connected to its rod body. The crushing hammers 23 are T-shaped, and each set of crushing hammers 23 is equidistantly linearly distributed along the length of the crushing rod 22. The cloth, and each set of crushing hammers 23 are distributed in an equidistant ring along the circumference of the crushing rod 22. By driving the fourth motor 21, the crushing rod 22 and each set of crushing hammers 23 can be rotated together. When the fly ash that has been pressed into a thin sheet by the pressure roller 20 falls onto the crushing rod 22, it will come into contact with each set of crushing hammers 23. At this time, the thin sheet fly ash can be initially crushed by each set of crushing hammers 23. After the initial crushing, the fly ash can fall through the guide port 10 at the bottom of the guide plate 9.

[0043] The granulation mechanism includes a fifth motor 24, which is installed on the rear end face of the granulation chamber 3 and located below the fourth motor 21. The end of its output shaft passes through the rear end face of the granulation chamber 3 and is fixedly connected to a granulation roller 25. The granulation roller 25 is located inside the granulation chamber 3 and between the screen plate 13 and the guide plate 9. Several granulation blocks 26 are fixedly connected to its roller body. The granulation blocks 26 are elongated and are distributed in an equidistant ring along the circumference of the granulation roller 25. By driving the fifth motor 24, the granulation roller 25 and each granulation block 26 can be rotated together. When the fly ash that has undergone primary crushing falls onto the granulation roller 25, it will come into contact with each granulation block 26. At this time, through the mutual cooperation between each granulation block 26 and the screen plate 13, the fly ash can be squeezed and crushed again until the fly ash falls through the screen hole 14 and collects in the collection trough 12. Thus, the fly ash can be processed into regular particles with uniform particle size and high mechanical strength, so that it can be stably solidified.

[0044] The bottom of the mixing hopper 5 is an inverted cone shape, and the mixing plate 16 is triangular. A cleaning brush 27 is provided on the side wall surface of the mixing hopper 5. The end of the cleaning brush 27 is attached to the inner wall of the mixing hopper 5. When the mixing plate 16 is used to stir and mix fly ash and chemical powder, the mixing plate 16 can drive the cleaning brush 27 to scrape back and forth along the inner wall of the mixing hopper 5 so as to effectively clean the residue adhering to the inner wall of the mixing hopper 5.

[0045] The mixing hopper 5 has several first positioning holes 28 protruding outwards from its top edge. The top cover 7 is circular, with a diameter equal to that of the top of the mixing hopper 5. Several first studs 29 are fixedly connected to the bottom of the top cover 7. The number of first studs 29 is the same as that of the first positioning holes 28, and their diameters are equal to those of the first positioning holes 28. The center of each first stud 29 corresponds one-to-one with the center of each first positioning hole 28. Each first stud 29 is threaded with a first nut 30 that mates with it. When the top cover 7 is placed on top of the mixing hopper 5, each first stud 29 can be aligned and pass through the corresponding first positioning hole 28. At this time, the first nut 30 is threaded onto each first stud 29 and tightened. The top cover 7 is fixed by the mutual cooperation between the first studs 29, the first positioning holes 28, and the first nut 30 to prevent it from loosening. The top cover 7 can be removed from the top of the mixing hopper 5 by unscrewing the first nut 30 so that the cleaning brush 27 can be cleaned regularly.

[0046] The two pressure rollers 20 have the same diameter and the same height, and are symmetrically distributed directly below the bottom end of the feeding hopper 4. When the fly ash and chemical powder that have been uniformly mixed enter the granulation hopper 3, they can ensure that they enter the biting area between the two pressure rollers 20. The roller body surface of the pressure rollers 20 has several pit-shaped grooves that are evenly distributed, which can increase the biting force of the two pressure rollers 20 on the fly ash and chemical powder and control the shape of the finished product.

[0047] The first guide block 8 is a right-angled trapezoid with an inclined end face at the top. The guide plate 9 is U-shaped, and the guide opening 10 is a long strip that is distributed in an equidistant ring along the arc surface of the guide plate 9. When the fly ash, which is pressed into a thin sheet by the pressure roller 20, falls onto the first guide block 8, it can slide along the first guide block 8 toward the crushing rod 22 to ensure that the thin sheet fly ash can fully contact each set of crushing hammers 23.

[0048] The screen plate 13 is arc-shaped, with second guide blocks 31 fixedly connected to both sides of its top. The second guide blocks 31 are triangular with an inclined top. Several insert rods 32 are fixedly connected to both sides of the bottom of the screen plate 13. The cross-sections of the collecting trough 12 and the granulation chamber 3 are both rectangular, with their outer wall length and width corresponding to the inner wall length and width of the granulation chamber 3, respectively. Several slots 33 are provided on both sides of the top of the collecting trough 12. The cross-sections of the slots 33 and the insert rods 32 are both circular, with the same number and corresponding diameters. And so on, and the center of each slot 33 corresponds one-to-one with the center of each insert rod 32. When the screen plate 13 is placed on the top of the collection trough 12, each insert rod 32 can be aligned and inserted into the corresponding slot 33. At this time, the screen plate 13 can be fixed by the mutual cooperation between the insert rod 32 and the slot 33 to prevent it from loosening. When the fly ash after primary crushing falls onto the second guide block 31, it can slide along the second guide block 31 toward the pellet roller 25 to ensure that the fly ash can fully contact each pellet block 26.

[0049] The support plate 1 has several second studs 34 fixedly connected to its bottom. Each second stud 34 is threaded with a corresponding second nut 35. The support plate 11 has several second positioning holes 36, the number of which is the same as the number of second studs 34. The diameter of each positioning hole is equal to the diameter of the second studs 34, and the center of each positioning hole 36 corresponds one-to-one with the center of each second stud 34. Each second stud 34 can be aligned and pass through its corresponding positioning hole 36. The second nut 35 is then threaded onto and tightened onto each second stud 34, allowing passage through the second studs 34. The cooperation between the second positioning hole 36 and the second nut 35 fixes the support plate 11 to the bottom of the support plate 1. At this time, the collection trough 12 can extend into the granulation chamber 3 and fit against the inside of the granulation chamber 3. By unscrewing the second nut 35, the support plate 11 and the screen plate 13 can be taken out of the granulation chamber 3 together. At this time, by pulling out the insertion rod 32, the screen plate 13 can be removed from the top of the collection trough 12 so as to replace the screen plate 13 with a screen hole 14 with a different aperture. Thus, the particle size of the fly ash particles after granulation can be controlled and adjusted as needed to meet different fly ash treatment requirements, thereby greatly expanding the application range of the device.

[0050] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0051] The working principle of this utility model is as follows:

[0052] In use, the fly ash, curing agent, co-solvent, and other additives, prepared according to a preset ratio, are introduced into the mixing hopper 5 and the top cover 7 is closed. Then, each motor is started via an external controller and power supply. The first motor 15 drives the mixing plate 16 to rotate. As the mixing plate 16 rotates, it stirs the fly ash and powdered agents within the mixing hopper 5, ensuring thorough and uniform mixing. This guarantees that each particle of fly ash comes into contact with the agent, preventing ineffective stabilization of some fly ash and increasing the risk of leaching of heavy metals and other pollutants. The uniformly mixed fly ash can be discharged by opening the discharge valve 6. The fly ash and chemical powder are fed into the feeding hopper 4. At this time, the second motor 17 drives the pusher rod 18 to rotate. When the pusher rod 18 rotates, the spiral protrusions on its body push the fly ash and chemical powder to move until they are fed into the granulation hopper 3. The two third motors 19 drive the two counter-pressure rollers 20 to rotate synchronously in opposite directions. When the fly ash and chemical powder enter the granulation hopper 3 and fall into the tiny gap between the two counter-pressure rollers 20, they are pressed into hard, thin sheets by the huge pressure applied by the counter-pressure rollers 20. The fourth motor 21 drives the crushing rod 22 along with each set of crushing hammers. The 23 rollers rotate together. When the fly ash, pressed into thin flakes by the pressure rollers 20, falls onto the crushing rod 22, it comes into contact with each set of crushing hammers 23. At this time, the set of crushing hammers 23 can perform primary crushing on the thin flake fly ash. After primary crushing, the fly ash can fall through the guide port 10 at the bottom of the guide plate 9. By driving the fifth motor 24, the pelletizing roller 25 and each pellet block 26 can rotate together. When the fly ash that has undergone primary crushing falls onto the pelletizing roller 25, it comes into contact with each pellet block 26. At this time, through the cooperation of each pellet block 26 and the screen plate 13, the fly ash can be squeezed and secondary crushed until... Fly ash falls through the sieve holes 14 and collects in the collection trough 12, thus processing the fly ash into regular particles with uniform particle size and high mechanical strength, so that it can be stabilized and solidified. Then, by unscrewing the second nut 35, the support plate 11 and the sieve plate 13 can be removed from the granulation chamber 3 to obtain granulated fly ash particles. By pulling out the insertion rod 32, the sieve plate 13 can be removed from the top of the collection trough 12 to replace the sieve plate 13 with a sieve hole 14 of different diameter. Thus, the particle size of the granulated fly ash particles can be controlled and adjusted as needed to meet different fly ash treatment requirements, thereby greatly expanding the applicability of the device.

[0053] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dry granulation device for fly ash feeding, characterized in that, The system includes a support plate, with several support legs fixedly connected to its bottom. A granulation hopper is fixedly connected to the top of the support plate. The bottom of the granulation hopper is open at the connection point with the support plate. A feeding hopper is fixedly connected to the top of the granulation hopper, and a mixing hopper is fixedly connected to the top of the feeding hopper. The bottom of the mixing hopper is connected to the feeding hopper and is equipped with a discharge valve. A top cover is installed on the top of the mixing hopper, and a mixing mechanism is mounted on the top cover. The feeding hopper is L-shaped, with its bottom end connected to the granulation hopper. The inner cavities are interconnected, and a feeding mechanism is provided in the feeding hopper. First guide blocks are fixedly connected to the inner walls on both sides of the granulation hopper. A guide plate is fixedly connected to the bottom of the first guide block. Several guide ports are opened at the bottom of the guide plate. A roller pressing mechanism, a crushing mechanism, and a granulation mechanism are respectively provided above and below the guide plate. A support plate is installed at the bottom of the support plate. A collection trough is fixedly connected to the top of the support plate. A screen plate is installed at the top of the collection trough. Several screen holes are opened at the bottom of the screen plate. The mixing mechanism includes a first motor, which is installed on the top of the top cover. Its output shaft passes through the top cover and extends into the mixing chamber. Mixing plates are fixedly connected to both sides of the output shaft of the first motor. The feeding mechanism includes a second motor, which is installed at one end of the feeding bin. Its output end is fixedly connected to a push rod via a coupling. The push rod is located inside the feeding bin and its body is provided with spiral protrusions. The roller pressing mechanism includes a pair of third motors, which are installed on the rear end face of the granulation chamber. The end of the output shaft of the third motor passes through the rear end face of the granulation chamber and is fixedly connected to a pair of pressure rollers. The pair of pressure rollers are located inside the granulation chamber and above the first guide block. The crushing mechanism includes a fourth motor, which is installed on the rear end face of the granulation chamber and located below the third motor. The end of its output shaft passes through the rear end face of the granulation chamber and is fixedly connected to a crushing rod. The crushing rod is located inside the granulation chamber and between the guide plate and the first guide block. Several sets of crushing hammers are fixedly connected to its rod body. The crushing hammers are T-shaped. Each set of crushing hammers is linearly distributed at equal intervals along the length of the crushing rod, and each set of crushing hammers is distributed in a ring at equal intervals along the circumference of the crushing rod. The granulation mechanism includes a fifth motor, which is installed on the rear end face of the granulation chamber and located below the fourth motor. The end of its output shaft passes through the rear end face of the granulation chamber and is fixedly connected to a granulation roller. The granulation roller is located inside the granulation chamber and between the sieve plate and the guide plate. Several granulation blocks are fixedly connected to its roller body.

2. The fly ash feeding dry granulation device according to claim 1, characterized in that, The bottom of the mixing hopper is inverted conical, the mixing plate is triangular, and its side wall surface is provided with cleaning brushes.

3. The fly ash feeding dry granulation device according to claim 1, characterized in that, The top edge of the mixing hopper protrudes outward and has several first positioning holes. The top cover is circular, and its diameter is equal to the top diameter of the mixing hopper. Several first studs are fixedly connected to the bottom of the top cover. The number of first studs is the same as the number of first positioning holes, and their diameter is equal to the diameter of the first positioning holes. The center of each first stud corresponds one-to-one with the center of each first positioning hole. Each first stud is threaded with a first nut that mates with it.

4. The fly ash feeding dry granulation device according to claim 1, characterized in that, The two pressure rollers have the same diameter and the same height, and are symmetrically distributed directly below the bottom end of the feeding hopper. The roller body surface of the pressure rollers has a number of pitted grooves evenly distributed.

5. The fly ash feeding dry granulation device according to claim 1, characterized in that, The first guide block is a right trapezoid with an inclined end face at the top. The guide plate is U-shaped, and the guide opening is long and narrow, and is distributed in an equidistant ring along the arc surface of the guide plate.

6. The fly ash feeding dry granulation device according to claim 1, characterized in that, The screen plate is arc-shaped, and a second guide block is fixedly connected to both sides of its top. The second guide block is triangular with an inclined end face at the top. Several insert rods are fixedly connected to both sides of the bottom of the screen plate. The cross-section of the collecting trough and the granulation chamber is rectangular, and the length and width of their outer walls correspond to the length and width of the inner walls of the granulation chamber, respectively. Several slots are opened on both sides of the top of the collecting trough. The cross-section of the slots and the insert rods is circular, and the number of slots is the same, the diameter is correspondingly equal, and the center of each slot corresponds one-to-one with the center of each insert rod.

7. The fly ash feeding dry granulation device according to claim 1, characterized in that, The bottom of the support plate is fixedly connected with several second studs, and a second nut is threaded onto the second stud to cooperate with it. The support plate is provided with several second positioning holes. The number of second positioning holes is the same as that of the second studs, and the hole diameter corresponds to the diameter of the second studs. The center of each second positioning hole corresponds one-to-one with the center of each second stud.

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