Energy-saving type heat recovery dryer

Abstract

The invention provides an energy-saving type heat recovery dryer, and relates to the technical field of heat exchange. The energy-saving type heat recovery drying machine comprises a drying machine body, two rotary drums, a conveying belt, a first motor, a hopper, two scattering rollers and a fixing frame, the two rotary drums are rotationally installed in the drying machine body, the conveying belt is arranged on the two rotary drums in a sleeving mode, the first motor is fixedly installed on one side of the drying machine body, and the hopper is fixedly installed on the other side of the drying machine body. An output shaft of the first motor extends into the drying machine body and is fixedly connected with the rotary drum, the fixing frame is fixedly installed on the drying machine body, the hopper is fixedly installed on the fixing frame, the two scattering rollers are rotatably installed in the hopper, a sieve plate is installed in the hopper in a sliding mode, and a circulation opening is formed in the bottom of the sieve plate. The energy-saving type heat recovery dryer has the advantages that use is convenient, large materials can be circularly scattered after screening, stacked materials can be conveniently spread out, and local overheating is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to an energy-saving heat recovery dryer. Background Art

[0002] A heat recovery dryer is a highly energy-efficient drying device. It uses heat exchange technology to recover the heat in the high-temperature waste gas discharged from the dryer and transfer it to the fresh air or the material to be dried entering the dryer through a heat exchanger. In this way, on the one hand, the temperature of the air entering the dryer is increased, accelerating the drying speed of the material; on the other hand, the temperature of the waste gas emission is reduced, reducing heat loss, thereby achieving the purpose of energy conservation. It is widely used in industries such as chemical engineering and building materials, such as drying various chemical raw materials and drugs in the chemical industry; drying gypsum boards, wood, etc. in the building materials industry.

[0003] When traditional energy-saving heat recovery dryers dry materials, some materials may have different contact areas with hot air due to agglomeration or different particle sizes. During the drying process of larger material particles, the heat transfer rate to the interior is slower, and it is easy to have a situation where the outside is dry while there is still a lot of moisture inside, resulting in uneven moisture content of the dried material. Moreover, when there is material agglomeration or large particles, it is easy to cause blockages in parts such as the feed inlet, conveying channel, or heat exchanger of the dryer.

[0004] Therefore, it is necessary to provide an energy-saving heat recovery dryer to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide an energy-saving heat recovery dryer that is easy to use, can circularly disperse larger materials after screening, is convenient for spreading piled-up materials, and prevents local overheating.

[0006] To solve the above technical problems, the energy-saving heat recovery dryer provided by the present invention includes: a dryer body, two rotating drums, a conveyor belt, a first motor, a hopper, two dispersing rollers and a fixing frame. The two rotating drums are rotatably installed in the dryer body. The conveyor belt is sleeved on the two rotating drums. The first motor is fixedly installed on one side of the dryer body, and the output shaft of the first motor extends into the dryer body and is fixedly connected to the rotating drum. The fixing frame is fixedly installed on the dryer body. The hopper is fixedly installed on the fixing frame. The two dispersing rollers are rotatably installed in the hopper. A sieve plate is slidably installed in the hopper. A circulation port is provided at the bottom of the sieve plate. One end of the sieve plate extends outside the hopper and is fixedly installed with a vibration motor. Both sides of the bottom of the sieve plate are slidably installed with movable blocks. One end of each of the two movable blocks close to each other is fixedly installed with a blocking plate. The end of the blocking plate away from the movable block extends into the circulation port of the sieve plate. A trapezoidal groove is provided on the movable block. A conical sieve is provided at the top of the sieve plate. A conical baffle is fixedly installed at the bottom of the conical sieve. Two second guide rods are also fixedly installed at the bottom of the conical sieve. The bottom ends of the two second guide rods penetrate the sieve plate and are fixedly installed with abutting blocks. The bottom of the abutting block is in contact with the inclined surface of the trapezoidal groove. A fourth spring is sleeved on the outside of the second guide rod. The two ends of the fourth spring are respectively fixedly connected to the conical sieve and the sieve plate. A support plate is fixedly installed on the fixing frame. A material return device is provided at the top of the support plate.

[0007] Preferably, the material return device includes a second conveying pipe fixedly installed at the top of the support plate. A material return pipe is fixedly installed on the outer wall of the second conveying pipe. One end of the material return pipe extends into the hopper. A first conveying pipe is provided in the hopper. One end of the first conveying pipe extends outside the hopper and is fixedly connected to the outer wall of the second conveying pipe. Augers are rotatably installed in both the first conveying pipe and the second conveying pipe. Second motors are fixedly installed at one ends of the second conveying pipe and the first conveying pipe respectively. The output shafts of the two second motors extend into the second conveying pipe and the first conveying pipe respectively, and are respectively fixedly connected to the two augers. A material receiving pipe is fixedly installed on the outer wall of the first conveying pipe. A discharge pipe is fixedly installed at the bottom of the sieve plate. The discharge pipe is located in the material receiving pipe.

[0008] Preferably, a plurality of first guide rods are fixedly installed in the hopper. The sieve plate is slidably installed on the first guide rods. A second spring is sleeved on the outside of the first guide rods. The two ends of the second spring are respectively fixedly connected to the sieve plate and the hopper.

[0009] Preferably, two first guide bolts are fixedly installed on both sides of the bottom of the sieve plate. A fixed ear is slidably installed on the outer side of the first guide bolt. One end of the fixed ear is fixedly connected to the movable block. A third spring is sleeved on the outer side of the first guide bolt. Both ends of the third spring are fixedly connected to the first guide bolt and the fixed ear respectively.

[0010] Preferably, a plurality of toothed plates are fixedly installed on the conveyor belt. An aggregate cylinder is rotatably installed at the bottom of the hopper. One ends of two hinge rods are respectively hinged to both ends of the aggregate cylinder. A lifting seat is arranged in the hopper. Fixed rods are fixedly installed on both sides of the lifting seat. The ends of the fixed rods far away from the lifting seat extend outside the hopper and are hinged to the other ends of the hinge rods. A second guide bolt is fixedly installed in the hopper. The top end of the second guide bolt extends into the lifting seat. Two first gears are fixedly installed on the outer wall of the aggregate cylinder. A connecting rod is rotatably installed at the bottom of the support plate. Two second gears are fixedly installed on the outer wall of the connecting rod. The second gears are meshed with the first gears. A fourth motor is fixedly installed at the bottom of the support plate. The output shaft of the fourth motor is fixedly connected to one end of the connecting rod.

[0011] Preferably, the length of the hinge rod is greater than the diameter of the aggregate cylinder.

[0012] Preferably, two support baffles are fixedly installed at the bottom of the hopper. Two bearings are rotatably installed on the outer wall of the aggregate cylinder. The outer walls of the bearings are fixedly installed on the support baffles. And the connecting rod penetrates through the two support baffles and is movably connected to the two support baffles.

[0013] Preferably, two triangular blocks are fixedly installed on both sides of the plurality of toothed plates. Two partition plates are fixedly installed in the dryer body. Movable frames are slidably installed on the two partition plates. Two rollers are rotatably installed at the bottom of the movable frame. The rollers are in contact with the toothed plates. A fixed cylinder is rotatably installed at the bottom of the movable frame. Four rake plates are fixedly installed on the outer wall of the fixed cylinder. A movable rod is arranged in the rake plate. A plurality of tooth rakes are fixedly installed at the bottom of the movable rod. The plurality of tooth rakes all extend outside the rake plate. Three first springs are fixedly installed at the top of the movable rod. The other ends of the first springs are fixedly connected to the rake plate. A rotating rod is rotatably installed on the movable frame. The same chain belt is sleeved on the outer side of the wheel axle of the roller and the outer side of the rotating rod. A fourth gear is fixedly installed at one end of the fixed cylinder. A third gear is fixedly installed on the outer side of the rotating rod. The third gear is meshed with the fourth gear.

[0014] Preferably, two third guiding rods are fixedly installed on the partition board, the movable frame is slidably installed on the two third guiding rods, a fifth spring is sleeved outside the third guiding rods, and two ends of the fifth spring are fixedly connected to the partition board and the movable frame respectively.

[0015] Preferably, sprockets are fixedly installed on the outer sides of the wheel shafts of the rollers and the outer sides of the rotating rods, and the chain belt is sleeved on the two sprockets.

[0016] Compared with the related art, the energy-saving heat recovery dryer provided by the present invention has the following beneficial effects: The present invention provides an energy-saving heat recovery dryer. Through the cooperation of a conical screen, a conical baffle, a fourth spring, a second guiding rod, a movable block, a plug plate, a resisting block, a sieve plate, a vibration motor, a first guiding bolt, a first guiding rod, a second spring, a fixed ear and a third spring, after the conical screen and the sieve plate separate large and small materials, materials with the same volume can be more evenly distributed in the dryer, making heat exchange more sufficient. Moreover, small materials have a large specific surface area, a large contact area with hot air, and fast heat transfer, and can reach a high drying degree in a short time, thereby improving the overall drying efficiency. Secondly, small materials are heated more evenly in the dryer, which can avoid the situation of undercooking or surface scorching of large materials due to uneven internal heating, making the quality of the dried materials more stable and uniform; through the cooperation of a second motor, a second conveying pipe, an auger, a first conveying pipe, a feeding pipe, a return pipe and a discharging pipe, after the larger materials are circulated and broken up, their particle sizes become smaller and the specific surface area increases, enabling them to be in full contact with hot air, making heat transfer more uniform, thereby improving the drying efficiency and effect. Secondly, it avoids the situation of undried large particle materials inside, and breaking up the larger materials can prevent them from accumulating or agglomerating in the dryer, avoiding equipment blockage caused by material accumulation. Through the cooperation of the first gear, the aggregate cylinder, the lifting seat, the fixed rod, the articulated rod, the connecting rod, the second gear and the fourth motor, when the aggregate cylinder rotates, the materials can be placed on the conveyor belt at intervals, so that the materials are more evenly distributed in the dryer. Thus, the hot air can penetrate the material layer more evenly, fully contact with the materials in each part, achieve uniform heating, and avoid uneven material accumulation caused by direct pouring, which may lead to uneven drying. Secondly, the intermittent conveying of materials results in a relatively small and stable conveying volume each time, making it easier to conveniently spread the materials evenly on the conveyor belt subsequently. Compared with pouring a large amount of materials at one time, this method can avoid the situation of materials piling up in blocks or being unevenly distributed, enabling the materials to form a uniform material layer on the conveyor belt. The relatively small amount of materials requires less force when being spread out subsequently. Whether relying on the vibration of the conveyor belt itself, auxiliary devices such as scrapers, or manual intervention, it is easier to spread the materials to the ideal state, reducing the difficulty and workload of the spreading work. When the aggregate chute of the aggregate cylinder rotates to directly below the hopper, the lifting seat can be opened while ensuring that the aggregate cylinder is accurately located directly below the discharge port, avoiding deviation during material discharge, ensuring that the materials can accurately fall into the aggregate cylinder, preventing material spillage, and when the lifting seat rises, the discharge port opens, thus avoiding material accumulation at the discharge port and accelerating the discharge speed; Through the cooperation of the fifth spring, the third guide rod, the movable frame, the fixed cylinder, the rake plate, the tooth rake, the fixed cylinder, the roller, the third gear, the fourth gear, the movable rod and the first spring, when the fixed cylinder rotates, the tooth rake can evenly disperse the materials in the dryer, avoiding local material accumulation, making the materials more evenly heated during the drying process, and improving the drying quality. Secondly, by spreading out the materials, the contact area between the materials and the hot air is increased, and the hot air can more fully exchange heat with the materials, accelerating the evaporation of moisture. Moreover, with the cooperation of multiple tooth rakes, when spreading out the materials, a reasonable gap can be formed between the materials, which is conducive to the smooth circulation of hot air in the dryer, avoiding poor air flow or local dead zones. When the fixed cylinder rotates, it can spread out and turn over the materials within a range of 360 degrees. Compared with a fixed rake, it can process the materials more comprehensively and evenly, ensuring that the materials are evenly distributed in the dryer and uniformly heated. During the rotation process, the tooth rakes on the two fixed cylinders are arranged in a staggered manner, which can effectively avoid material accumulation in specific areas, keeping the materials in a continuously dynamic loose state and facilitating the circulation of hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the first embodiment of the energy-saving heat recovery dryer provided by the present invention; Figure 2 is Figure 1 a schematic diagram of another perspective of the structure shown; Figure 3 is Figure 1 a schematic diagram of a partial structure shown; Figure 4 is Figure 3 the schematic diagram of the structural cross-section shown; Figure 5 is Figure 4 the enlarged schematic diagram of the structure of part A shown; Figure 6 is Figure 4 the schematic diagram of the partial structure shown; Figure 7 is Figure 6 the bottom view schematic diagram of the structure shown; Figure 8 is Figure 6 the schematic diagram of the structural cross-section shown; Figure 9 is Figure 4 the cross-sectional schematic diagram of the first conveying pipe, the second conveying pipe and the return pipe shown; Figure 10 is the schematic diagram of the structure of the second embodiment of the energy-saving heat recovery dryer provided by the present invention; Figure 11 is Figure 10 the schematic diagram of the structural cross-section shown; Figure 12 is Figure 10 the schematic diagram of the partial structure shown; Figure 13 is Figure 12 the assembly schematic diagram of the aggregate cylinder, the hopper and the hinge rod shown; Figure 14 is Figure 13 the schematic diagram of the structural cross-section shown; Figure 15 is Figure 13 the assembly schematic diagram of the aggregate cylinder, the hinge rod, the fixed rod and the lifting seat shown; Figure 16 is Figure 15 the cross-sectional schematic diagram of the lifting seat and the second guide bolt shown; Figure 17 is the schematic diagram of the structure of the third embodiment of the energy-saving heat recovery dryer provided by the present invention; Figure 18 is Figure 17 the schematic diagram of the structural cross-section shown; Figure 19 is Figure 18 the schematic diagram of the partial structure shown; Figure 20 is Figure 19 the cross-sectional schematic diagram of the rake plate shown.

[0018] Markings in the figure: 1, dryer body; 2, rotating drum; 3, conveyor belt; 4, first motor; 5, dispersing roller; 6, first conveying pipe; 7, second conveying pipe; 8, return pipe; 9, second motor; 10, hopper; 11, vibration motor; 12, first spring; 13, first guide rod; 14, sieve plate; 15, second spring; 16, conical screen; 17, second guide rod; 18, conical baffle; 19, movable block; 20, first guide bolt; 21, discharge pipe; 22, fixed ear; 23, third spring; 24, plug plate; 25, abutting block; 26, fourth spring; 27, receiving pipe; 28, movable rod; 29, third gear; 30, auger; 31, toothed plate; 32, aggregate cylinder; 33, chain belt; 34, articulated rod; 35, first gear; 36, connecting rod; 37, second gear; 38, fourth motor; 39, fixed rod; 40, second guide bolt; 41, rotating rod; 42, lifting seat; 43, fourth gear; 44, triangular block; 45, movable frame; 46, rake plate; 47, partition board; 48, third guide rod; 49, fifth spring; 50, fixed cylinder; 51, tooth rake; 52, roller. Detailed implementation mode

[0019] The present invention will be further described below in conjunction with the accompanying drawings and the implementation mode.

[0020] First embodiment: Please refer to Figures 1 - 9, in the first embodiment of the present invention, the energy-saving heat recovery dryer includes: a dryer body 1, two rotating drums 2, a conveyor belt 3, a first motor 4, a hopper 10, two dispersing rollers 5 and a fixing frame. The two rotating drums 2 are rotatably installed in the dryer body 1. The conveyor belt 3 is sleeved on the two rotating drums 2. The first motor 4 is fixedly installed on one side of the dryer body 1, and the output shaft of the first motor 4 extends into the dryer body 1 and is fixedly connected to the rotating drum 2. The fixing frame is fixedly installed on the dryer body 1. The hopper 10 is fixedly installed on the fixing frame. The two dispersing rollers 5 are rotatably installed in the hopper 10. A sieve plate 14 is slidably installed in the hopper 10. A flow port is provided at the bottom of the sieve plate 14. One end of the sieve plate 14 extends outside the hopper 10 and is fixedly installed with a vibration motor 11. When the vibration motor 11 is started, the vibration motor 11 drives the sieve plate 14 to vibrate, so that the smaller materials on the conical sieve mesh 16 and the sieve plate 14 are further quickly separated. When vibrating, the conical sieve mesh 16 will move up and down by inertia and drive the abutting block 25 to continuously rise and fall through the second guide rod 17. When descending, the abutting block 25 drives the movable block 19 away from the discharge pipe 21, so that the blocking plate 24 opens the flow port on the sieve plate 14, and the larger materials are discharged into the first conveying pipe 6 through the discharge pipe 21 and the receiving pipe 27. Movable blocks 19 are slidably installed on both sides of the bottom of the sieve plate 14. Blocking plates 24 are fixedly installed at one ends of the two movable blocks 19 close to each other. One end of the blocking plate 24 away from the movable block 19 extends into the flow port of the sieve plate 14. A trapezoidal groove is provided on the movable block 19. A conical sieve mesh 16 is provided at the top of the sieve plate 14. A conical baffle 18 is fixedly installed at the bottom of the conical sieve mesh 16. The conical baffle 18 can prevent the smaller materials from passing through the conical sieve mesh 16 and entering the middle of the sieve plate 14, and prevent them from entering the first conveying pipe 6 together with the large materials. When the small materials pass through the conical sieve mesh 16 and enter the sieve plate 14, the conical baffle 18 guides the small materials to a position farther from the middle of the sieve plate 14, so that the small materials can be conveniently screened out from the sieve holes of the sieve plate 14. Two second guide rods 17 are also fixedly installed at the bottom of the conical sieve mesh 16. The bottom ends of the two second guide rods 17 penetrate the sieve plate 14 and are fixedly installed with an abutting block 25. The bottom of the abutting block 25 is in contact with the inclined surface of the trapezoidal groove. A fourth spring 26 is sleeved on the outside of the second guide rod 17. The two ends of the fourth spring 26 are respectively fixedly connected to the conical sieve mesh 16 and the sieve plate 14. A support plate is fixedly installed on the fixing frame. A material return device is provided at the top of the support plate.

[0021] The material return device includes a second conveying pipe 7 fixedly installed on the top of the support plate. A material return pipe 8 is fixedly installed on the outer wall of the second conveying pipe 7. One end of the material return pipe 8 extends into the hopper 10. A first conveying pipe 6 is arranged in the hopper 10. One end of the first conveying pipe 6 extends outside the hopper 10 and is fixedly connected to the outer wall of the second conveying pipe 7. Augers 30 are rotatably installed in both the first conveying pipe 6 and the second conveying pipe 7. Second motors 9 are fixedly installed at one ends of the second conveying pipe 7 and the first conveying pipe 6 respectively. Output shafts of the two second motors 9 extend into the second conveying pipe 7 and the first conveying pipe 6 respectively, and are fixedly connected to the two augers 30 respectively. A material receiving pipe 27 is fixedly installed on the outer wall of the first conveying pipe 6. A discharge pipe 21 is fixedly installed at the bottom of the sieve plate 14. The discharge pipe 21 is located inside the material receiving pipe 27. When the two second motors 9 drive the two augers 30 to rotate respectively, larger materials can be conveyed to the top of the dispersing roller 5 again through the material return pipe 8, so that the dispersing roller 5 can disperse the materials again.

[0022] A plurality of first guide rods 13 are fixedly installed in the hopper 10. The sieve plate 14 is slidably installed on the first guide rods 13. A second spring 15 is sleeved on the outer side of the first guide rods 13. Two ends of the second spring 15 are fixedly connected to the sieve plate 14 and the hopper 10 respectively.

[0023] Two first guide bolts 20 are fixedly installed on both sides of the bottom of the sieve plate 14. A fixed ear 22 is slidably installed on the outer side of the first guide bolts 20. One end of the fixed ear 22 is fixedly connected to the movable block 19. A third spring 23 is sleeved on the outer side of the first guide bolts 20. Two ends of the third spring 23 are fixedly connected to the first guide bolts 20 and the fixed ear 22 respectively.

[0024] The working principle of the energy-saving heat recovery dryer provided by the present invention is as follows: First, start the first motor 4. The output shaft of the first motor 4 drives the rotating drum 2 to rotate. At this time, the two rotating drums 2 drive the conveyor belt 3 to rotate. Then, start the motor on one side of the hopper 10 to drive the dispersing roller 5 to rotate. Pour the material from the hopper 10. The two dispersing rollers 5 start to disperse the material. The dispersed material falls onto the conical screen 16 and the screen plate 14. The smaller material passes through the screen plate 14 and falls into the hopper 10, while the larger material accumulates on the screen plate 14. At this time, start the vibration motor 11. The vibration motor 11 drives the screen plate 14 to vibrate, so that the smaller material on the conical screen 16 and the screen plate 14 is further quickly separated. When vibrating, the conical screen 16 will move up and down by inertia and drive the abutting block 25 to continuously rise and fall through the second guide rod 17. When descending, the abutting block 25 drives the movable block 19 away from the discharge pipe 21, so that the blocking plate 24 opens the flow port on the screen plate 14, and the larger material is discharged into the first conveying pipe 6 through the discharge pipe 21 and the receiving pipe 27. Since the conical screen 16 is constantly rising and falling, the flow port will be constantly opened and closed at this time, and the material can be indirectly discharged to avoid blockage caused by excessive discharge. Subsequently, start the two second motors 9. The two second motors 9 respectively drive the two augers 30 to rotate, and the larger material is conveyed to the top of the dispersing roller 5 again through the return pipe 8, so that the dispersing roller 5 disperses the material again.

[0025] Compared with the related technology, the energy-saving heat recovery dryer provided by the present invention has the following beneficial effects: The present invention provides an energy-saving heat recovery dryer. Through the cooperation of the conical screen 16, the conical baffle 18, the fourth spring 26, the second guide rod 17, the movable block 19, the blocking plate 24, the abutting block 25, the screen plate 14, the vibration motor 11, the first guide bolt 20, the first guide rod 13, the second spring 15, the fixed ear 22 and the third spring 23, after the conical screen 16 and the screen plate 14 separate the large and small materials, the materials of the same volume can be more evenly distributed in the dryer, making the heat exchange more sufficient. And the specific surface area of the small materials is large, the contact area with the hot air is large, and the heat transfer is fast, so that a higher drying degree can be achieved in a shorter time, thereby improving the overall drying efficiency. Secondly, the small materials are heated more evenly in the dryer, which can avoid the situation of undercooking or surface scorching of the large materials due to uneven internal heating, making the quality of the dried materials more stable and uniform; through the cooperation of the second motor 9, the second conveying pipe 7, the auger 30, the first conveying pipe 6, the receiving pipe 27, the return pipe 8 and the discharge pipe 21, after the larger materials are cyclically dispersed, their particle sizes become smaller and the specific surface area increases, which can fully contact with the hot air, making the heat transfer more uniform, thereby improving the drying efficiency and effect. Secondly, it avoids the situation of undried inside the large particle materials. Dispersing the larger materials can prevent them from accumulating or agglomerating in the dryer and avoid equipment blockage caused by material accumulation.

[0026] Second Embodiment: Based on the energy-saving heat recovery dryer provided in the first embodiment of the present application, another energy-saving heat recovery dryer is proposed in the second embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0027] The following further describes the second embodiment of the present invention in conjunction with the accompanying drawings and embodiments.

[0028] Please refer to Figures 10 - 16 , the energy-saving heat recovery dryer further includes a plurality of toothed plates 31. Since the aggregate cylinder 32 rotates continuously, the materials can be discharged onto the conveyor belt at intervals, and the materials are separated by the toothed plates 31 to prevent the materials from scattering to other empty places, avoiding burying the scattered materials when the materials are spread out, which may cause various impacts on the scattered materials due to long-term heating. Moreover, the materials are separated by the plurality of toothed plates 31. The conveyor belt is heated inside the dryer body 1. There is no material originally in the intervals. When the materials are spread out, they will cover these areas and be in direct contact with the surface of the conveyor belt. Due to the effect of heat conduction, the heat of the conveyor belt will be transferred to the materials, which helps to dry the materials. The plurality of toothed plates 31 are all fixedly installed on the conveyor belt 3. The bottom of the hopper 10 is rotatably installed with an aggregate cylinder 32. One end of each of the two hinge rods 34 is hinged to both ends of the aggregate cylinder 32. A lifting seat 42 is arranged inside the hopper 10. Fixed rods 39 are fixedly installed on both sides of the lifting seat 42. The end of the fixed rod 39 far from the lifting seat 42 extends outside the hopper 10 and is hinged to the other end of the hinge rod 34. A second guide bolt 40 is fixedly installed inside the hopper 10. The top end of the second guide bolt 40 extends into the lifting seat 42. Two first gears 35 are fixedly installed on the outer wall of the aggregate cylinder 32. A connecting rod 36 is rotatably installed at the bottom of the support plate. Two second gears 37 are fixedly installed on the outer wall of the connecting rod 36. The second gears 37 are meshed with the first gears 35. A fourth motor 38 is fixedly installed at the bottom of the support plate. The output shaft of the fourth motor 38 is fixedly connected to one end of the connecting rod 36. When the aggregate groove on the aggregate cylinder 32 rotates to be directly below the discharge port of the hopper 10, the fixed rod 39 is driven by the hinge rod 34 to lift the lifting seat 42 and open the discharge port, so that the materials in the hopper 10 fall into the aggregate cylinder 32. When the lifting seat 42 is lifted to a certain height, the discharge port is opened, enabling the materials to quickly enter the aggregate cylinder 32.

[0029] The length of the hinge rod 34 is greater than the diameter of the aggregate cylinder 32.

[0030] Two support baffles are fixedly installed at the bottom of the hopper 10. Two bearings are rotatably installed on the outer wall of the aggregate cylinder 32. The outer walls of the bearings are fixedly installed on the support baffles, and the connecting rod 36 passes through the two support baffles and is movably connected to the two support baffles.

[0031] When the materials are concentrated at the inner bottom of the hopper 10, start the fourth motor 38. The output shaft of the fourth motor 38 drives the connecting rod 36 to rotate. The connecting rod 36 drives the two second gears 37 to rotate, and drives the aggregate cylinder 32 to rotate continuously through meshing with the first gear 35. When the aggregate groove on the aggregate cylinder 32 rotates to be directly below the discharge port of the hopper 10, the fixed rod 39 is driven by the articulated rod 34 to lift the lifting seat 42, opening the discharge port, so that the materials in the hopper 10 fall into the aggregate cylinder 32. When the lifting seat 42 is lifted to a certain height, the discharge port is opened, enabling the materials to quickly enter the aggregate cylinder 32. When the aggregate groove of the aggregate cylinder 32 is not directly below the discharge port of the hopper 10, the lifting seat 42 blocks the discharge port through the articulated rod 34 to prevent the materials from falling. Subsequently, the aggregate cylinder 32 rotates and pours the materials onto the conveyor belt 3. Since the aggregate cylinder 32 rotates continuously, the materials can be placed on the conveyor belt at intervals, and the materials are separated by the toothed plate 31, preventing the materials from scattering to other places during the conveying and drying process, and avoiding the scattered materials affecting the temperature of the materials when spreading the materials later. Through the arrangement of the above components in the present invention, when the aggregate cylinder 32 rotates, the materials can be placed on the conveyor belt at intervals, so that the materials are more evenly distributed in the dryer, and the hot air can penetrate the material layer more evenly, fully contact with each part of the materials, achieving uniform heating, avoiding uneven accumulation of materials caused by direct pouring, and thus making the drying uneven. Secondly, the materials are conveyed at intervals, and the amount of each conveyance is relatively small and stable, making it easier to evenly spread the materials on the conveyor belt later. Compared with pouring a large amount of materials at one time, this method can avoid the situation of materials piling up in blocks or uneven distribution, enabling the materials to form a uniform material layer on the conveyor belt. The smaller amount of materials requires less force when spreading later. Whether relying on the vibration of the conveyor belt itself, auxiliary devices such as scrapers, or manual intervention, it is easier to spread the materials to the ideal state, reducing the difficulty and workload of the spreading work. When the aggregate groove of the aggregate cylinder 32 rotates to be directly below the hopper 10, when the lifting seat 42 is opened, it can ensure that the aggregate cylinder 32 is accurately located directly below the discharge port, avoiding deviation during material discharge, ensuring that the materials can accurately fall into the aggregate cylinder 32, and preventing the materials from spilling.

[0032] Third Embodiment: Based on the energy-saving heat recovery dryer provided in the second embodiment of the present application, another energy-saving heat recovery dryer is proposed in the third embodiment of the present application. The third embodiment is merely a preferred manner of the second embodiment, and the implementation of the third embodiment will not affect the independent implementation of the second embodiment.

[0033] The following further describes the third embodiment of the present invention in conjunction with the drawings and embodiments.

[0034] Please refer to Figures 17 - 20, the energy-saving heat recovery dryer further includes a plurality of triangular blocks 44. When the rollers 52 rotate on the conveyor belt 3, the movable frame 45 can be lifted and lowered through the triangular blocks 44 to prevent the tooth rake 51 from damaging the tooth plate 31. The plurality of triangular blocks 44 are respectively fixedly installed on both sides of the plurality of tooth plates 31. Two partition plates 47 are fixedly installed in the dryer body 1. The movable frame 45 is slidably installed on both partition plates 47. Two rollers 52 are rotatably installed at the bottom of the movable frame 45. The rollers 52 are in contact with the tooth plates 31. A fixed cylinder 50 is rotatably installed at the bottom of the movable frame 45. Four rake plates 46 are fixedly installed on the outer wall of the fixed cylinder 50. A movable rod 28 is provided in the rake plate 46. A plurality of tooth rakes 51 are fixedly installed at the bottom of the movable rod 28. The plurality of tooth rakes 51 all extend outside the rake plate 46. Three first springs 12 are fixedly installed at the top of the movable rod 28. The other ends of the first springs 12 are fixedly connected to the rake plate 46. A rotating rod 41 is rotatably installed on the movable frame 45. The outer sides of the wheel axles of the rollers 52 and the outer side of the rotating rod 41 are both sleeved with the same chain belt 33 through sprockets. One end of the fixed cylinder 50 is fixedly installed with a fourth gear 43. A third gear 29 is fixedly installed on the outer side of the rotating rod 41. The third gear 29 and the fourth gear 43 are meshed with each other. When the rollers 52 roll on the conveyor belt 3, through the cooperation of the chain, the third gear 29 and the fourth gear 43, the fixed cylinder 50 can be driven to rotate, and the material can be spread out by the tooth rakes 51 to form a reasonable gap between the materials, which is beneficial to the smooth flow of hot air in the dryer and avoids poor air flow or local dead zones.

[0035] Two third guide rods 48 are fixedly installed on the partition plate 47. The movable frame 45 is slidably installed on the two third guide rods 48. A fifth spring 49 is sleeved on the outer side of the third guide rod 48. The two ends of the fifth spring 49 are respectively fixedly connected to the partition plate 47 and the movable frame 45.

[0036] Sprockets are fixedly installed on the outer sides of the wheel axles of the rollers 52 and the outer side of the rotating rod 41. The chain belt 33 is sleeved on the two sprockets.

[0037] When the materials are placed on the conveyor belt 3 at intervals, the conveyor belt 3 is rotating. At this time, the roller 52 rolls on the conveyor belt, drives the rotating rod 41 to rotate through the chain belt 33, and can drive the fixed cylinder 50 to rotate under the cooperation of the third gear 29 and the fourth gear 43, so that the fixed cylinder 50 drives the four rake plates 46 to rotate, and spreads the materials through the toothed rake 51. Through the cooperation of the roller 52 and the triangular block 44, when the toothed plate 31 moves to directly below the partition plate 47, the movable frame 45 can be lifted and lowered to prevent the toothed rake 51 from damaging the toothed plate 31. And because multiple toothed plates 31 separate the materials by a certain distance, there is no material in this distance, and the temperature will rise at this time. The toothed rake 51 spreads the piled-up materials onto it, so that the materials can be in contact with the high temperature, and thus the heating is uniform. Secondly, through the setting of the above components of the present invention, when the fixed cylinder 50 rotates, the toothed rake 51 can evenly disperse the materials in the dryer, avoiding local accumulation of materials, making the materials more evenly heated during the drying process, and improving the drying quality. Secondly, by spreading the materials, the contact area between the materials and the hot air is increased, and the hot air can more fully exchange heat with the materials, accelerating the evaporation of moisture. And under the cooperation of multiple toothed rakes 51, when spreading the materials, a reasonable gap can be formed between the materials, which is beneficial to the smooth flow of hot air in the dryer, avoiding poor air flow or local dead zones. When the fixed cylinder 50 rotates, it can spread and turn the materials within a range of 360 degrees. Compared with a fixed rake, it can process the materials more comprehensively and evenly, ensuring that the materials are evenly distributed in the dryer and heated uniformly. During the rotation process, the toothed rakes 51 on the two fixed cylinders 50 are arranged in a staggered manner, which can effectively avoid the accumulation of materials in a specific area, making the materials continuously in a dynamic loose state, which is beneficial to the flow of hot air.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. An energy-saving heat recovery dryer, comprising: A dryer body, two rotating drums, a conveyor belt, a first motor, a hopper, two dispersing rollers, and a fixing frame. The two rotating drums are rotatably installed inside the dryer body. The conveyor belt is sleeved on the two rotating drums. The first motor is fixedly installed on one side of the dryer body, and the output shaft of the first motor extends into the dryer body and is fixedly connected to the rotating drum. The fixing frame is fixedly installed on the dryer body, the hopper is fixedly installed on the fixing frame, and the two dispersing rollers are rotatably installed inside the hopper. It is characterized in that a sieve plate is slidably installed inside the hopper. A circulation port is provided at the bottom of the sieve plate. One end of the sieve plate extends outside the hopper and is fixedly installed with a vibration motor. Two movable blocks are slidably installed on both sides of the bottom of the sieve plate. One end of each of the two movable blocks close to each other is fixedly installed with a blocking plate. The end of the blocking plate away from the movable block extends into the circulation port of the sieve plate. A trapezoidal groove is provided on the movable block. A conical sieve is provided at the top of the sieve plate. A conical baffle is fixedly installed at the bottom of the conical sieve. Two second guide rods are also fixedly installed at the bottom of the conical sieve. The bottom ends of the two second guide rods penetrate through the sieve plate and are fixedly installed with abutting blocks. The bottom of the abutting block is in contact with the inclined surface of the trapezoidal groove. A fourth spring is sleeved on the outside of the second guide rod. The two ends of the fourth spring are respectively fixedly connected to the conical sieve and the sieve plate. A support plate is fixedly installed on the fixing frame, and a material return device is provided at the top of the support plate.

2. The energy-saving heat recovery dryer according to claim 1, wherein The material return device includes a second conveying pipe fixedly installed at the top of the support plate. A material return pipe is fixedly installed on the outer wall of the second conveying pipe. One end of the material return pipe extends into the hopper. A first conveying pipe is provided inside the hopper. One end of the first conveying pipe extends outside the hopper and is fixedly connected to the outer wall of the second conveying pipe. Augers are rotatably installed inside both the first conveying pipe and the second conveying pipe. Second motors are fixedly installed at one ends of the second conveying pipe and the first conveying pipe respectively. The output shafts of the two second motors extend into the second conveying pipe and the first conveying pipe respectively, and are respectively fixedly connected to the two augers. A material receiving pipe is fixedly installed on the outer wall of the first conveying pipe. A discharge pipe is fixedly installed at the bottom of the sieve plate. The discharge pipe is located inside the material receiving pipe.

3. The energy-saving heat recovery dryer according to claim 1, wherein A plurality of first guide rods are fixedly installed inside the hopper. The sieve plate is slidably installed on the first guide rods. A second spring is sleeved on the outside of the first guide rods. The two ends of the second spring are respectively fixedly connected to the sieve plate and the hopper.

4. The energy-saving heat recovery dryer according to claim 1, characterized in that, Two first guide bolts are fixedly installed on both sides of the bottom of the sieve plate. A fixed ear is slidably installed on the outside of the first guide bolts. One end of the fixed ear is fixedly connected to the movable block. A third spring is sleeved on the outside of the first guide bolts. The two ends of the third spring are respectively fixedly connected to the first guide bolts and the fixed ears.

5. The energy-saving heat recovery dryer according to claim 1, characterized in that, A plurality of toothed plates are fixedly installed on the conveyor belt. A collecting cylinder is rotatably installed at the bottom of the hopper. One ends of two hinge rods are respectively hinged to both ends of the collecting cylinder. A lifting seat is arranged in the hopper. Fixed rods are fixedly installed on both sides of the lifting seat. The ends of the fixed rods far away from the lifting seat extend outside the hopper and are hinged to the other ends of the hinge rods. A second guiding bolt is fixedly installed in the hopper, and the top end of the second guiding bolt extends into the lifting seat. Two first gears are fixedly installed on the outer wall of the collecting cylinder. A connecting rod is rotatably installed at the bottom of the support plate. Two second gears are fixedly installed on the outer wall of the connecting rod. The second gears are meshed with the first gears. A fourth motor is fixedly installed at the bottom of the support plate, and an output shaft of the fourth motor is fixedly connected to one end of the connecting rod.

6. The energy-saving heat recovery dryer according to claim 5, wherein The length of the hinge rod is greater than the diameter of the collecting cylinder.

7. The energy-saving heat recovery dryer according to claim 5, characterized in that, Two support baffles are fixedly installed at the bottom of the hopper. Two bearings are rotatably installed on the outer wall of the collecting cylinder. The outer walls of the bearings are fixedly installed on the support baffles, and the connecting rod penetrates through the two support baffles and is movably connected to the two support baffles.

8. The energy-saving heat recovery dryer according to claim 5, wherein Two triangular blocks are fixedly installed on both sides of the plurality of toothed plates. Two partition plates are fixedly installed in the dryer body. Moving frames are slidably installed on the two partition plates. Two rollers are rotatably installed at the bottom of the moving frame. The rollers are in contact with the toothed plates. A fixed cylinder is rotatably installed at the bottom of the moving frame. Four rake plates are fixedly installed on the outer wall of the fixed cylinder. A movable rod is arranged in the rake plate. A plurality of tooth rakes are fixedly installed at the bottom of the movable rod, and the plurality of tooth rakes all extend outside the rake plate. Three first springs are fixedly installed at the top of the movable rod, and the other ends of the first springs are fixedly connected to the rake plate. A rotating rod is rotatably installed on the moving frame. The outer sides of the wheel axles of the rollers and the outer side of the rotating rod are sleeved with the same chain belt. A fourth gear is fixedly installed at one end of the fixed cylinder. A third gear is fixedly installed on the outer side of the rotating rod. The third gear is meshed with the fourth gear.

9. The energy-saving heat recovery dryer according to claim 8, wherein Two third guiding rods are fixedly installed on the partition plates. The moving frame is slidably installed on the two third guiding rods. A fifth spring is sleeved on the outer side of the third guiding rod, and the two ends of the fifth spring are respectively fixedly connected to the partition plate and the moving frame.

10. The energy-saving heat recovery dryer according to claim 8, characterized in that, Sprockets are fixedly installed on the outer sides of the wheel axles of the rollers and the outer side of the rotating rod, and the chain belt is sleeved on the two sprockets.

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