Fly ash recovery pretreatment device

Abstract

The invention discloses a fly ash recovery pretreatment device, which belongs to the technical field of fly ash pretreatment devices, comprises a mounting frame, and is characterized in that the top of the mounting frame is fixedly connected with a shell, the top of the shell is communicated with a feeding bin, and the bottom of the shell is communicated with a discharging bin; a feeding bin and a discharging bin are arranged in the shell, double flap valves are arranged in the feeding bin and the discharging bin, a drying mechanism is arranged in the shell, the drying mechanism is used for drying fly ash entering the shell, and a screening mechanism is arranged on one side of the drying mechanism. Through integrated design, the problem that function modules of an existing device are independent is solved, drying, vibration screening, caking crushing and superfine dust collection are synchronously driven through air flow of the air heater, independent power mechanisms do not need to be configured for all the functions, the size and manufacturing cost of the device are greatly reduced, material residues and losses caused by pipeline connection are reduced, and the device is suitable for large-scale popularization and application. Meanwhile, the energy utilization efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a fly ash recycling pretreatment device, belonging to the technical field of fly ash pretreatment device. BACKGROUND

[0002] During the discharge and collection of fly ash, it is easy to be affected by humidity and form agglomerates, and it often contains unburned coal particles, large impurities and ultra-fine dust. If it is directly recycled and utilized, not only the performance stability of the subsequent products will be reduced, but also the ultra-fine dust may be raised during the processing process to cause secondary pollution, and the untreated wet fly ash will also increase the transportation and storage costs.

[0003] The existing fly ash recycling pretreatment device on the market is composed of a feeding system, a drying unit, a crushing unit, a classification and collection unit and a discharging and storage unit. The drying unit usually uses an independent electric heater or a steam heating device to dry the fly ash through heat conduction or heat convection. The crushing unit is usually equipped with a special crusher (such as a hammer crusher or an impact crusher) to scatter the agglomerated fly ash by driving the crushing parts with a motor. The classification and collection unit separates the impurities and ultra-fine dust in the fly ash by using a filter screen, a cyclone separator or a bag-type dust collector. Each unit operates independently and needs to be equipped with a dedicated power source. The overall device is connected in series through pipelines or conveying mechanisms to realize the continuous operation of the fly ash from feeding to pretreatment completion.

[0004] However, the above scheme has the following disadvantages in actual use:

[0005] 1. The function modules of the existing fly ash recycling pretreatment device are generally independently arranged, and the drying, crushing and classification and collection rely on independent power mechanisms and equipment, which not only increases the overall volume, manufacturing cost and energy consumption of the device, but also needs complex pipeline connections, and the fly ash is easy to be left over and wasted during the transfer process.

[0006] 2. The drying and crushing of the existing fly ash recycling pretreatment device have poor coordination, the dried fly ash is easy to be re-hydrated and agglomerated, and the independent crushing unit is difficult to timely receive the dried fly ash from the independent drying device, which easily leads to the reduction of the crushing efficiency of the crushing unit and incomplete scattering of the agglomerates. SUMMARY

[0007] To solve the above technical problems, the present application provides a fly ash recycling pretreatment device.

[0008] The technical scheme adopted by the present application to solve the technical problems is:

[0009] The utility model provides a fly ash recycling pretreatment device, including the mounting frame, the top fixedly connected with the casing of mounting frame, the top intercommunication of casing is provided with the feed bin, the bottom intercommunication of casing is provided with the discharge bin, the inside of feed bin and discharge bin is equipped with double flap valve,

[0010] The inside of the casing is provided with a drying mechanism for drying the fly ash entering the inside of the casing;

[0011] The drying mechanism side is equipped with screening mechanism, and the screening mechanism is used for crushing and screening the fly ash in drying;

[0012] The side of screening mechanism is equipped with collection mechanism, and the collection mechanism is used for collecting the superfine dust in crushing and screening;

[0013] In this scheme, the casing is used as a work cavity to realize integrated closed operation of feeding, drying, crushing, screening, dust collection and discharging, reducing dust leakage and material loss; the feed bin is used for receiving wet fly ash to be treated, and the discharge bin is used for outputting pretreated qualified materials; the double flap valves in the feed bin and the discharge bin are designed with double sealing to control the start-stop rhythm of feeding and discharging, isolate the airflow exchange between the inside of the casing and the outside, avoid hot air leakage and external air entering to cause fly ash moisture absorption; the drying mechanism, the screening mechanism and the collection mechanism sequentially complete fly ash drying and dehumidification, agglomeration crushing, particle size screening and superfine dust collection in the casing to complete the pretreatment of fly ash

[0014] Preferably, the drying mechanism includes a hot air machine and a flow guide plate, the bottom of the hot air machine is fixedly connected with the mounting frame, and the output end of the hot air machine is in communication with the bottom of the casing;

[0015] The flow guide plate is arranged in the casing, the flow guide plate is in L-shaped, the flow guide plate is arranged on the right side of the top opening of the discharge bin, one end of the flow guide plate is fixedly connected with the inner wall bottom wall of the feed bin, and a gap exists between the other end of the flow guide plate and the right inner wall of the casing, and the flow guide plate is fixedly connected with the inner walls of the casing on both sides;

[0016] In this scheme, the hot air machine provides continuous hot air for drying operation, the output end of the hot air machine is in communication with the bottom of the casing to ensure that the hot air is directed into the inner cavity of the casing; the L-shaped flow guide plate realizes double functions through specific layout; one end of the flow guide plate is fixed with the inner wall bottom wall of the feed bin, and the two sides are attached to the inner walls of the casing to form a closed lower airflow channel, so that the hot air flows along the bottom of the flow guide plate after being impacted at the bent part of the flow guide plate, accurately impacts the vortex generator below to provide power for the vibration structure; and a gap is reserved between the other end of the flow guide plate and the inner wall of the casing, the hot air flows upward through the gap to the upper side of the flow guide plate to form a reverse airflow, fully contacts with the fly ash in the screening frame when flowing through the screening frame, and efficiently removes moisture through heat convection to realize drying.

[0017] Preferably, the screening mechanism comprises a screening frame, a vibrating structure and a crushing structure;

[0018] The screening frame is arranged above the flow guide plate, and a plurality of screen holes are formed in the surface of the screening frame and uniformly distributed;

[0019] The vibrating structure is used to drive the high-frequency horizontal shaking of the screening frame;

[0020] The crushing structure is used to crush the caked fly ash in the screening frame after drying, so that the material can pass through the screening frame;

[0021] In this scheme, the screening frame serves as a material bearing and screening carrier, and the screen holes uniformly distributed on the surface are passages for the dispersed fly ash; the vibrating structure drives the high-frequency horizontal shaking of the screening frame, so that the fly ash in the frame is in a dynamic dispersion state, avoiding material accumulation and clogging of the screen holes, and providing auxiliary kinetic energy for the crushing structure; the crushing structure is aimed at the caked fly ash that has not been dispersed after drying, and breaks the caking through active impact and friction, so that the particle size of the material is reduced to a range that can pass through the screen holes.

[0022] Preferably, the vibrating structure comprises an eddy generator, the eddy generator is arranged below the flow guide plate, a through groove is arranged above the eddy generator, and the through groove penetrates the flow guide plate;

[0023] A first connecting structure is arranged between the bottom wall inside the housing and the bottom of the eddy generator, and the first connecting structure is used to fixedly connect the eddy generator and the inner wall of the housing, and limit the amplitude and direction of the swinging of the eddy generator under the action of the airflow;

[0024] A second connecting structure is arranged between the eddy generator and the screening frame, and the second connecting structure is used to connect and fix the eddy generator and the screening frame, while avoiding the fly ash from reaching the bottom of the flow guide plate through the gap between the through groove and the second connecting structure;

[0025] In this scheme, when the hot air generated by the hot air machine flows along the channel on the lower side of the flow guide plate, it impacts the cylindrical hollow eddy generator, utilizes the eddy effect in fluid mechanics to push the eddy generator to swing horizontally in a regular manner; the first connecting structure fixes the eddy generator and the bottom wall of the housing through the cooperation of the mounting sleeve and the first connecting rod, and limits the swinging amplitude and direction of the eddy generator through the positioning action of the self-locking bolt and the insertion slot, avoiding excessive shaking and causing structural damage; the second connecting structure transmits the swinging kinetic energy of the eddy generator to the screening frame through the second connecting rod, driving the screening frame to swing horizontally at a high frequency synchronously; meanwhile, the second connecting structure is sealed, and the extrusion spring and the like can block the gap between the through groove and the connecting rod, preventing the fly ash from falling to the bottom of the flow guide plate and ensuring that all the materials are processed in the screening frame.

[0026] Preferably, the vortex generator is provided in a cylindrical shape, and the vortex generator is hollow inside;

[0027] The cylindrical structure in this scheme enables the hot air to uniformly act on the surface of the vortex generator, forming a stable vortex field, ensuring the regularity of the swinging direction and the stability of the kinetic energy transmission; the hollow design reduces the weight of the vortex generator itself, improves its response sensitivity to the hot air, and reduces the energy consumption of the hot air required for driving.

[0028] Preferably, the first connecting structure comprises a mounting sleeve, the mounting sleeve is provided through the bottom of the shell, the mounting sleeve is fixedly connected with the bottom of the shell, a self-locking bolt is threadedly connected to the surface of the mounting sleeve, a first connecting rod is slidably arranged in the middle of the mounting sleeve, a plurality of insertion slots are formed in the surface of the first connecting rod, and the plurality of insertion slots are uniformly distributed and matched with the self-locking bolt.

[0029] In this scheme, the mounting sleeve penetrates through the bottom of the shell and is fixed, providing a stable mounting reference for the first connecting rod; the first connecting rod can slide axially along the mounting sleeve, and by adjusting its insertion depth, it can adapt to the demand for the swing amplitude of the vortex generator under different working conditions; after the adjustment is completed, the self-locking bolt on the surface of the mounting sleeve is tightened, so that the bolt is clamped into the corresponding insertion slot on the surface of the first connecting rod, realizing the positioning and fixing of the first connecting rod, and then locking the swing range of the vortex generator, ensuring the stable operation of the vibration structure, and avoiding the influence of the screening and crushing effects due to the too large or too small swing amplitude.

[0030] Preferably, the second connecting structure comprises a second connecting rod, the bottom of the second connecting rod is fixedly connected with the vortex generator, the top of the second connecting rod is fixedly connected with the screening frame, the middle of the second connecting rod is provided through a through slot, the outer periphery of the second connecting rod is fixedly connected with a limiting ring, the bottom of the limiting ring is provided with a baffle, the baffle is slidably connected with the second connecting rod, the diameter of the baffle is more than twice the diameter of the through slot, an extrusion spring is arranged between the baffle and the limiting ring, the extrusion spring is sleeved on the outer periphery of the second connecting rod, the top of the second connecting rod abuts against the limiting ring, and the bottom of the second connecting rod abuts against the baffle.

[0031] In this scheme, the second connecting rod realizes the rigid connection of the vortex generator and the screening frame, ensuring that the swing kinetic energy can be transmitted to the screening frame; the limiting ring provides a support point for the extrusion spring, and the elastic force of the extrusion spring pushes the baffle to tightly fit the surface of the drainage plate; since the diameter of the baffle is more than twice the diameter of the through slot, the gap between the through slot and the second connecting rod can be completely blocked, preventing the fly ash from leaking to the bottom of the drainage plate.

[0032] Preferably, the crushing structure comprises a moving crushing piece and a fixed crushing piece, the moving crushing piece is arranged inside the screening frame, both sides of the moving crushing piece are provided with the fixed crushing pieces, and the bottoms of the two fixed crushing pieces are fixedly connected with the bottom wall inside the screening frame.

[0033] The moving crushing piece is provided with a chamfer at a corresponding position of the two fixed crushing pieces, and the two fixed crushing pieces are provided with a matching chamfer at a corresponding position of the moving crushing piece.

[0034] The bottom of the screening frame is provided with two sliding grooves at corresponding positions of the moving crushing piece, the sliding grooves are both provided with a sliding rod penetrating therethrough, the bottoms of the sliding rods are both fixedly connected with a limiting block, and the top of the sliding rod is provided with an elastic connecting structure between the moving crushing piece.

[0035] The number of the moving crushing pieces is multiple, and the moving crushing pieces are uniformly distributed.

[0036] In this scheme, when the screening frame shakes horizontally at a high frequency, the moving crushing piece generates an impact force in the opposite direction of the shaking direction of the screening frame due to inertia, and moves close to and collides with the fixed crushing pieces on both sides; the matching chamfers at the corresponding positions of the moving crushing piece and the fixed crushing pieces form a shearing and extruding combined force when colliding, which accurately acts on the agglomerated fly ash and breaks the agglomerated structure; the sliding grooves and the sliding rods at the bottom of the screening frame provide horizontal sliding guidance for the moving crushing piece, ensuring the accuracy of the impact direction; the multiple moving crushing pieces uniformly distributed cover the entire screening frame, avoiding crushing dead angles and ensuring that all agglomerated materials can be effectively crushed, thereby ensuring the screening pass rate.

[0037] Preferably, the elastic connecting structure comprises a sliding block, the bottom of the sliding block is fixedly connected with the sliding rod, the moving crushing piece is provided with a limiting groove at a corresponding position of the sliding block, the sliding block is slidably connected with the limiting groove, the sliding rod penetrates through the moving crushing piece, and the sliding rod is slidably connected with the moving crushing piece.

[0038] In this scheme, the sliding rod and the sliding block cooperate to provide a vertical movement space for the moving crushing piece; when the moving crushing piece collides with the fixed crushing piece, the contact of the matching chamfers generates an upward component force, which pushes the moving crushing piece to slide upward along the limiting groove and compresses the return spring; during the upward movement, the chamfer surfaces of the moving crushing piece and the fixed crushing piece rub against each other, further grinding the agglomerated fly ash and improving the crushing effect; after the collision ends, the return spring releases the elastic potential energy, pushes the sliding block and drives the moving crushing piece to reset downward, preparing for the next impact; the elastic connecting structure not only enhances the completeness of the crushing, but also avoids the rigid collision between the moving crushing piece and the fixed crushing piece, reducing the wear of the parts.

[0039] Preferably, the collecting mechanism comprises a collecting bin arranged on one side of the shell, the collecting bin is fixedly connected with the shell, a communication pipe is arranged in communication between the top of the collecting bin and the shell, a filter bag is arranged in the collecting bin, and a negative pressure fan is arranged at the bottom of the collecting bin.

[0040] In this scheme, the negative pressure fan forms a negative pressure environment in the collecting bin after being started, a pressure difference is formed between the inside of the shell and the collecting bin through the communication pipe, and the hot air carrying superfine dust in the shell is directionally sucked into the collecting bin; the filter bag is a core filtering component, and its dense structure can intercept the superfine dust in the airflow, so that the dust and the hot air are separated; the clean hot air after filtration is discharged through the negative pressure fan, so that secondary pollution caused by dust escaping is avoided; the collecting bin stores the intercepted superfine dust, and subsequent recycling is facilitated, so that the resource utilization rate is improved, and the environmental protection requirement is met.

[0041] Compared with the prior art, the beneficial effects of the present application are as follows:

[0042] 1. The present application solves the pain points of independent function modules of the existing device through integrated design, synchronously drives drying, vibration screening, agglomeration breaking and superfine dust collection through the airflow of the hot air blower, does not need to configure independent power mechanisms for each function, greatly reduces the device size and manufacturing cost, reduces the material residues and losses caused by pipeline connection, and improves the energy utilization efficiency.

[0043] 2. The present application realizes efficient cooperation of drying and breaking, processes the material through the vibration and breaking structure of the screening frame immediately after drying by hot air, avoids that the fly ash is re-hydrated and agglomerated after drying, cooperates with the impact friction design of the adaptive chamfer, ensures that the agglomeration is completely broken, improves the pretreatment efficiency and the material qualification rate, and simultaneously prevents secondary pollution of superfine dust through closed operation and filter bag collection. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the structures shown in the drawings.

[0045] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0046] Figure 2 It is a partial structure sectional view of the present application;

[0047] Figure 3 It is a schematic diagram of the drainage plate structure of the present application;

[0048] Figure 4A schematic view of the screening frame structure of the present application;

[0049] Figure 5 A schematic view of the elastic connection structure of the present application;

[0050] Figure 6 A schematic view of the mobile phone mechanism of the present application;

[0051] Figure 7 A schematic view of the A part structure of the present application; Figure 2

[0052] Figure 8 A schematic view of the B part structure of the present application; Figure 2

[0053] Figure 9 A schematic view of the C part structure of the present application. Figure 4 In the figure:

[0054]

[0055] 1, mounting frame; 11, shell; 12, feeding bin; 13, discharging bin; 14, double flap valve;

[0056] 2, drying mechanism; 21, hot air blower; 22, flow guide plate;

[0057] 3, screening mechanism; 31, screening frame; 32, vibrating structure; 33, crushing structure; 34, screen hole;

[0058] 321, vortex generator; 322, through slot; 323, first connecting structure; 324, second connecting structure;

[0059] 3231, mounting sleeve; 3232, self-locking bolt; 3233, first connecting rod; 3234, insertion slot;

[0060] 3241, second connecting rod; 3242, limiting ring; 3243, baffle; 3244, extrusion spring;

[0061] 331, moving crushing piece; 332, fixed crushing piece; 333, sliding groove; 334, sliding rod;

[0062] 335, limiting block; 336, elastic connection structure;

[0063] 3361, sliding block; 3362, limiting slot; 3363, return spring;

[0064] 4, collecting mechanism; 41, collecting bin; 42, communication pipe; 43, filter bag; 44, negative pressure fan. DETAILED DESCRIPTION

[0065] ​​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0066] With reference to Figure 1 and 2 , the present application provides a technical solution:

[0067] A fly ash recycling pretreatment device, comprising a mounting frame 1, a shell 11 is fixedly connected to the top of the mounting frame 1, a feeding bin 12 is communicatively arranged at the top of the shell 11, and a discharging bin 13 is communicatively arranged at the bottom of the shell 11, and double flap valves 14 are arranged inside the feeding bin 12 and the discharging bin 13;

[0068] The shell 11 is internally provided with a drying mechanism 2, which is used for drying the fly ash entering the inside of the shell 11;

[0069] One side of the drying mechanism 2 is provided with a screening mechanism 3, which is used for crushing and screening the fly ash in the drying process;

[0070] One side of the screening mechanism 3 is provided with a collecting mechanism 4, which is used for collecting the superfine dust in the crushing and screening process.

[0071] Further, with reference to Figure 1 , 2 , the drying mechanism 2 comprises a hot air fan 21 and a flow guide plate 22, the bottom of the hot air fan 21 is fixedly connected to the mounting frame 1, and the output end of the hot air fan 21 is communicatively arranged at the bottom of the shell 11;

[0072] The flow guide plate 22 is arranged inside the shell 11, the flow guide plate 22 is in an L shape, the flow guide plate 22 is arranged at the right side of the top opening of the discharging bin 13, one end of the flow guide plate 22 is fixedly connected to the inner wall bottom of the feeding bin 12, a gap exists between the other end of the flow guide plate 22 and the right inner wall of the inside of the shell 11, and the flow guide plate 22 is fixedly connected to the inner walls of the shell 11 on both sides;

[0073] Specifically, rectification vanes for rectifying the hot air can also be arranged between the bottom of the flow guide plate 22 and the inner wall of the shell 11; and a screen structure for preventing the fly ash from flowing back can also be arranged between the top of the flow guide plate 22 and the inner wall of the shell 11.

[0074] Further, with reference to Figure 2 , 4 , 5, the screening mechanism 3 comprises a screening frame 31, a vibrating structure 32 and a crushing structure 33;

[0075] The screening frame 31 is arranged above the flow guide plate 22, and a plurality of screen holes 34 are arranged on the surface of the screening frame 31 and uniformly distributed;

[0076] The vibration structure 32 is used to drive the screening frame 31 to swing horizontally at a high frequency;

[0077] The crushing structure 33 is used to crush the caked fly ash in the screening frame 31 after drying, so that the material can pass through the screening frame 31.

[0078] Further, please refer to Figure 2 、 7 , 8, the vibration structure 32 includes an eddy current generator 321, the eddy current generator 321 is arranged below the flow guide plate 22, and a through groove 322 is arranged above the eddy current generator 321 and penetrates the flow guide plate 22;

[0079] A first connecting structure 323 is arranged between the bottom wall inside the shell 11 and the bottom of the eddy current generator 321, and the first connecting structure 323 is used to fixedly connect the eddy current generator 321 and the inner wall of the shell 11, and limit the amplitude and direction of the swing of the eddy current generator 321 under the action of the airflow;

[0080] A second connecting structure 324 is arranged between the eddy current generator 321 and the screening frame 31, and the second connecting structure 324 is used to connect and fix the eddy current generator 321 and the screening frame 31, and avoid the fly ash reaching the bottom of the flow guide plate 22 through the gap between the through groove 322 and the second connecting structure 324.

[0081] Further, please refer to Figure 2 and 7 , the eddy current generator 321 is in the shape of a cylinder and is hollow inside.

[0082] Further, please refer to Figure 7 , the first connecting structure 323 includes a mounting sleeve 3231, the mounting sleeve 3231 penetrates the bottom of the shell 11 and is fixedly connected to the bottom of the shell 11, a self-locking bolt 3232 is threadedly connected to the surface of the mounting sleeve 3231, a first connecting rod 3233 is slidingly arranged in the middle of the mounting sleeve 3231, a plurality of insertion grooves 3234 are arranged on the surface of the first connecting rod 3233 and uniformly distributed, and the plurality of insertion grooves 3234 are matched with the self-locking bolt 3232.

[0083] Further, please refer to Figure 8The second connecting structure 324 comprises a second connecting rod 3241, the bottom of the second connecting rod 3241 is fixedly connected with the vortex generator 321, the top of the second connecting rod 3241 is fixedly connected with the screening frame 31, the middle part of the second connecting rod 3241 penetrates through the through slot 322, the outer periphery of the second connecting rod 3241 is fixedly connected with a limiting ring 3242, the bottom of the limiting ring 3242 is provided with a baffle 3243, the baffle 3243 is slidably connected with the second connecting rod 3241, the diameter of the baffle 3243 is more than twice the diameter of the through slot 322, an extrusion spring 3244 is arranged between the baffle 3243 and the limiting ring 3242, the extrusion spring 3244 is sleeved on the outer periphery of the second connecting rod 3241, the top of the second connecting rod 3241 abuts against the limiting ring 3242, and the bottom of the second connecting rod 3241 abuts against the baffle 3243;

[0084] Further, the crushing structure 33 comprises a moving crushing piece 331 and a fixed crushing piece 332, the moving crushing piece 331 is arranged in the interior of the screening frame 31, the moving crushing piece 331 is provided with the fixed crushing piece 332 on both sides, and the bottoms of the two fixed crushing pieces 332 are fixedly connected with the bottom wall in the interior of the screening frame 31.

[0085] The moving crushing piece 331 is provided with a chamfer at a position corresponding to the two fixed crushing pieces 332, and the two fixed crushing pieces 332 are provided with chamfers that are adapted to the moving crushing piece 331 at positions corresponding to the moving crushing piece 331.

[0086] The bottom of the screening frame 31 is provided with two sliding grooves 333 at positions corresponding to the moving crushing piece 331, sliding rods 334 are arranged in the two sliding grooves 333, limiting blocks 335 are fixedly connected with the bottoms of the two sliding rods 334, and elastic connecting structures 336 are arranged between the tops of the two sliding rods 334 and the moving crushing piece 331.

[0087] The number of the moving crushing pieces 331 is multiple, and the multiple moving crushing pieces 331 are uniformly distributed.

[0088] Further, please refer to Figure 5 The elastic connecting structure 336 comprises a sliding block 3361, the bottom of the sliding block 3361 is fixedly connected with the sliding rod 334, the moving crushing piece 331 is provided with a limiting groove 3362 at a position corresponding to the sliding block 3361, the sliding block 3361 is slidably connected with the limiting groove 3362, the sliding rod 334 penetrates through the moving crushing piece 331, and the sliding rod 334 is slidably connected with the moving crushing piece 331.

[0089] The bottom of the sliding block 3361 is provided with a reset spring 3363, the reset spring 3363 is sleeved on the outer periphery of the sliding rod 334, the top of the reset spring 3363 abuts against the sliding block 3361, and the bottom of the reset spring 3363 abuts against the limiting groove 3362.

[0090] Further, please refer to Figure 6The collecting mechanism 4 comprises a collecting bin 41 arranged on one side of the shell 11, the collecting bin 41 is fixedly connected with the shell 11, a communication pipe 42 is arranged in communication between the top of the collecting bin 41 and the shell 11, a filter bag 43 is arranged in the collecting bin 41, and a negative pressure fan 44 is arranged at the bottom of the collecting bin 41.

[0091] The working process of the embodiment is as follows:

[0092] The feed preparation stage: the operator opens the double flap valve 14 of the feed bin 12, and pours the wet fly ash to be treated from the feed bin 12 into the shell 11, and the fly ash falls onto the screening frame 31 above the L-shaped flow guide plate 22 under the action of gravity; after the feeding is completed, the double flap valve 14 of the feed bin 12 is closed to form a closed operation environment to prevent the hot air from leaking and the dust from flying.

[0093] The hot air supply and power transmission stage: the hot air generator 21 is started, the hot air generated by the hot air generator 21 is introduced from the bottom of the shell 11, flows along the lower side channel of the L-shaped flow guide plate 22 after being guided by the L-shaped flow guide plate 22, accurately impacts the vortex generator 321, and drives the vortex generator 321 to generate regular horizontal swinging; then the hot air flows upward through the gap between the L-shaped flow guide plate 22 and the inner wall of the shell 11, and enters the area where the screening frame 31 is located, to prepare for the drying operation.

[0094] The drying and vibration linkage stage: the swinging of the vortex generator 321 is transmitted to the screening frame 31 through the second connecting structure 324, and drives the screening frame 31 to swing horizontally at a high frequency; at the same time, the reverse hot air flows through the screening frame 31, fully contacts with the fly ash in the frame, and quickly removes the moisture of the material through the heat convection to realize the drying and dehumidification; during the vibration process, the fly ash is dynamically dispersed in the screening frame 31 to avoid incomplete drying in local areas.

[0095] The crushing and screening stage: when the screening frame 31 vibrates, the movable crushing piece 331 impacts the two fixed crushing pieces 332 due to inertia, and the shear and extrusion combined force is formed by the adaptive chamfer to break the dried and crushed fly ash; during the collision process, the movable crushing piece 331 slides upward, the chamfer surface rubs and grinds the material to further refine the particle size; the dispersed fly ash falls onto the L-shaped flow guide plate 22 through the screen hole 34, and then is guided by the L-shaped flow guide plate 22 to move in the direction of the discharge bin 13; the material that does not pass through continues to be vibrated and crushed in the frame until the screening requirement is met.

[0096] The ultra-fine dust collecting stage: the negative pressure fan 44 continuously operates, the hot air carrying the ultra-fine dust in the shell 11 enters the collecting bin 41 under the action of negative pressure through the communication pipe 42, the filter bag 43 traps and stores the ultra-fine dust, and the clean hot air is discharged through the negative pressure fan 44; the process is carried out synchronously, which not only avoids dust leakage, but also realizes the recycling of ultra-fine dust.

[0097] Discharge stage: the pretreated qualified fly ash is gathered to the discharge bin 13 under the action of gravity, the operator opens the double flap valve 14 of the discharge bin 13, the material is output for subsequent further screening or other harmless treatment, so as to complete the whole pretreatment process.

[0098] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A fly ash recovery pre-treatment device comprising a mounting frame (1), characterized in that, The top of the mounting frame (1) is fixedly connected with a shell (11), the top of the shell (11) is communicatively provided with a feeding bin (12), the bottom of the shell (11) is communicatively provided with a discharging bin (13), and the feeding bin (12) and the discharging bin (13) are both internally provided with double flap valves (14); The inside of the shell (11) is provided with a drying mechanism (2), which is used for drying the fly ash entering the inside of the shell (11); One side of the drying mechanism (2) is provided with a screening mechanism (3), which is used for crushing and screening the fly ash in the drying process; One side of the screening mechanism (3) is provided with a collecting mechanism (4), which is used for collecting the superfine dust in the crushing and screening process.

2. A fly ash recovery pre-treatment device according to claim 1, characterized in that, The drying mechanism (2) comprises a hot air blower (21) and a flow guide plate (22), the bottom of the hot air blower (21) is fixedly connected with the mounting frame (1), and the output end of the hot air blower (21) is communicatively provided at the bottom of the shell (11); The flow guide plate (22) is arranged in the shell (11), the flow guide plate (22) is in an L shape, the flow guide plate (22) is arranged at the right side of the top opening of the discharging bin (13), one end of the flow guide plate (22) is fixedly connected with the inner wall bottom of the feeding bin (12), the other end of the flow guide plate (22) is provided with a gap between the right side inner wall of the shell (11), and the flow guide plate (22) is fixedly connected with the inner wall of the shell (11) on both sides.

3. A fly ash recovery pre-treatment device according to claim 1, characterized in that, The screening mechanism (3) comprises a screening frame (31), a vibrating structure (32) and a crushing structure (33); The screening frame (31) is arranged above the flow guide plate (22), a plurality of screen holes (34) are formed in the surface of the screening frame (31), and the screen holes (34) are uniformly distributed; The vibrating structure (32) is used for driving the screening frame (31) to shake horizontally at a high frequency; The crushing structure (33) is used for crushing the fly ash agglomerated after drying in the screening frame (31), so that the material can pass through the screening frame (31).

4. A fly ash recovery pre-treatment device according to claim 3, characterized in that, The vibrating structure (32) comprises an eddy current generator (321), the eddy current generator (321) is arranged below the flow guide plate (22), a through groove (322) is arranged above the eddy current generator (321), and the through groove (322) penetrates the flow guide plate (22); A first connecting structure (323) is arranged between the bottom of the eddy current generator (321) and the bottom wall of the shell (11), the first connecting structure (323) is used for fixedly connecting the eddy current generator (321) with the inner wall of the shell (11) and limiting the amplitude and direction of the swing of the eddy current generator (321) under the action of the airflow; A second connecting structure (324) is arranged between the eddy current generator (321) and the screening frame (31), the second connecting structure (324) is used for connecting and fixing the eddy current generator (321) and the screening frame (31), and meanwhile, the second connecting structure (324) avoids the fly ash from reaching the bottom of the flow guide plate (22) through the gap between the through groove (322) and the second connecting structure (324).

5. A fly ash recovery pre-treatment device according to claim 4, characterized in that, The vortex generator (321) is provided in a cylindrical shape, and the vortex generator (321) is hollow inside.

6. A fly ash recovery pre-treatment device according to claim 4, characterized in that, The first connecting structure (323) comprises a mounting sleeve (3231) penetrating through the bottom of the shell (11) and fixedly connected with the bottom of the shell (11), a self-locking bolt (3232) being threadedly connected to the surface of the mounting sleeve (3231), and a first connecting rod (3233) being slidingly arranged in the middle of the mounting sleeve (3231), a plurality of insertion grooves (3234) being formed in the surface of the first connecting rod (3233) and uniformly distributed, and the plurality of insertion grooves (3234) being matched with the self-locking bolt (3232).

7. A fly ash recovery pre-treatment device according to claim 4, characterized in that, The second connecting structure (324) comprises a second connecting rod (3241) fixedly connected with the vortex generator (321) at the bottom and fixedly connected with the screening frame (31) at the top, the second connecting rod (3241) penetrating through the through slot (322), a limiting ring (3242) fixedly connected with the second connecting rod (3241) at the outer periphery, a baffle (3243) arranged at the bottom of the limiting ring (3242) and slidingly connected with the second connecting rod (3241), the diameter of the baffle (3243) being more than twice the diameter of the through slot (322), an extrusion spring (3244) arranged between the baffle (3243) and the limiting ring (3242), the extrusion spring (3244) being sleeved on the outer periphery of the second connecting rod (3241), the top of the second connecting rod (3241) abutting against the limiting ring (3242), and the bottom of the second connecting rod (3241) abutting against the baffle (3243).

8. A fly ash recovery pre-treatment device according to claim 3, characterized in that, The crushing structure (33) comprises a moving crushing piece (331) and a fixed crushing piece (332), the moving crushing piece (331) being arranged inside the screening frame (31), and the fixed crushing pieces (332) being arranged on both sides of the moving crushing piece (331) and fixedly connected with the inner bottom wall of the screening frame (31); The moving crushing piece (331) and the fixed crushing pieces (332) are provided with corresponding chamfers, and the fixed crushing pieces (332) and the moving crushing piece (331) are provided with corresponding matching chamfers; The bottom of the screening frame (31) is provided with two sliding grooves (333) corresponding to the moving crushing piece (331), sliding rods (334) penetrating through the sliding grooves (333), limiting blocks (335) fixedly connected with the bottoms of the sliding rods (334), and elastic connecting structures (336) arranged between the tops of the sliding rods (334) and the moving crushing piece (331); The number of the moving crushing pieces (331) is plural, and the moving crushing pieces (331) are uniformly distributed.

9. A fly ash recovery pre-treatment device according to claim 8, characterized in that, The elastic connecting structure (336) comprises a sliding block (3361), the bottom of the sliding block (3361) is fixedly connected with a sliding rod (334), a limiting groove (3362) is arranged at a corresponding position of the sliding block (3361) and the moving crushing piece (331), the sliding block (3361) is slidably connected with the limiting groove (3362), the sliding rod (334) penetrates through the moving crushing piece (331), and the sliding rod (334) is slidably connected with the moving crushing piece (331); The bottom of the sliding block (3361) is provided with a reset spring (3363), the reset spring (3363) is sleeved on the outer periphery of the sliding rod (334), the top of the reset spring (3363) abuts against the sliding block (3361), and the bottom of the reset spring (3363) abuts against the limiting groove (3362).

10. The fly ash recovery pre-treatment device of claim 1, wherein, The collecting mechanism (4) comprises a collecting bin (41), the collecting bin (41) is arranged on one side of the shell (11), the collecting bin (41) is fixedly connected with the shell (11), a communication pipe (42) is arranged in communication between the top of the collecting bin (41) and the shell (11), the inside of the collecting bin (41) is provided with a filter bag (43), and the bottom of the collecting bin (41) is provided with a negative pressure fan (44).

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