A granulator discharge heat energy recycling device and a method of using the same

Abstract

This invention discloses a device for recovering and utilizing the discharge heat energy of a pellet mill and its method of use. The device includes a drying chamber and a conveying assembly disposed within the drying chamber. An intermittent feeding assembly is located on the right side of the top of the drying chamber. Two partitions are fixedly connected to the front and rear sides of the inner cavity of the drying chamber, dividing the inner cavity into a drying chamber and two insulation chambers. This invention relates to the field of feed pelleting equipment technology. This device and its method of using a pellet mill, through the arrangement of the conveying assembly and the intermittent feeding assembly, ensures uniform feed distribution while simultaneously drying the feed during the conveying process using a hot air duct. The two partitions and the drying chamber work together to construct the drying chamber and the insulation chamber. The addition of a dehumidification chamber effectively dehumidifies the humid and hot air. The air vents provide good insulation support for the drying chamber within the insulation chamber, thus achieving the reuse of heat energy.

Description

Technical Field

[0001] This invention relates to the field of feed pelleting equipment technology, specifically to a device for recovering and utilizing the discharge heat energy of a pellet mill and its usage method. Background Technology

[0002] The feed pellet mill mainly consists of feeding, mixing, pelleting, transmission, and lubrication systems. Its working process involves feed powder with a moisture content not exceeding 15% entering the feeding auger from the hopper. The appropriate material flow rate is obtained by adjusting the speed of the continuously variable motor. The powder then enters the mixer, where it is agitated and mixed with steam for conditioning. If molasses or oil needs to be added, it is also added through the mixing drum and conditioned with steam. The amount of oil added generally does not exceed 3%, otherwise pelleting will be difficult. After conditioning, the temperature of the feed powder can reach 64–85℃, and the moisture content 14–16%. The powder then passes through an inclined chute and an optional magnetic separator to remove iron impurities mixed in with the powder. Finally, it enters the pressing chamber for pelleting.

[0003] The manufactured feed pellets usually need to be dried. For example, the feed pellet mill with anti-clogging technology described in application number 202122398162.3 allows the feed pellets to fall directly onto the mesh conveyor belt after being pressed and extruded. With the help of the hot air conveyor pipe, the feed pellets are pre-dried.

[0004] Based on the search of the above information, it can be seen that directly using hot air pipes to dry feed pellets on a mesh conveyor belt results in significant heat loss, and the dried feed also requires cooling, making the process quite cumbersome. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a device for recovering and utilizing the discharge heat energy of a pellet mill and its usage method. This solves the problem that directly using hot air pipes to dry feed pellets on a mesh conveyor belt results in significant heat loss, and the dried feed also requires cooling, making the process cumbersome.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a device for recovering and utilizing the discharge heat energy of a granulator, comprising a drying chamber and a conveying assembly disposed within the drying chamber. An intermittent material feeding assembly is disposed on the right side of the top of the drying chamber. Two partitions are fixedly connected to the front and rear sides of the inner cavity of the drying chamber, which divide the inner cavity of the drying chamber into a drying chamber and two insulation chambers. The two insulation chambers are respectively disposed on the front and rear sides of the drying chamber. The conveying assembly is disposed within the drying chamber. A hot air pipe communicating with the drying chamber is connected to the top left side of the drying chamber and is disposed above the conveying assembly. A dehumidification chamber is fixedly connected to the right side of the drying chamber, and the dehumidification chamber and the drying chamber are connected through an air inlet slot. The dehumidification chamber and the two insulation chambers are connected through air guide holes.

[0009] The bottom left side of the drying chamber is connected to a discharge pipe.

[0010] The present invention is further configured such that: the intermittent feeding assembly includes a cylinder, a feeding hopper is connected to the left side of the top of the cylinder, a feeding groove is provided at the bottom of the cylinder, a rotating rod is rotatably installed inside the cylinder, and at least eight feeding plates are fixedly connected to the outer periphery of the rotating rod at even intervals, and one side of the feeding plate slides in contact with the inner surface of the cylinder.

[0011] The rotating rod is located on the right side of the feed hopper.

[0012] The invention is further configured such that: the top of the drying oven is provided with an installation groove, and the cylinder is fixedly connected inside the installation groove.

[0013] The present invention is further configured such that: the conveying assembly includes a drive motor and two rotating shafts, a drive roller and a driven roller are respectively sleeved and fixedly connected to the outer periphery of the two rotating shafts, the drive roller and the driven roller are connected by a conveyor belt, and the output end of the drive motor is fixedly connected to one end of one rotating shaft through a coupling.

[0014] The present invention is further configured such that: the front and rear sides of the driving roller and the driven roller are respectively in contact with the opposite sides of the two partitions; the two ends of the rotating shaft pass through the two partitions respectively and extend to the opposite sides of the two partitions; and the drive motor is fixedly connected to the inner wall of the drying oven.

[0015] The present invention is further configured such that: the dehumidification box includes a box body, and three support plates are fixedly connected between the front and rear sides of the inner cavity of the box body. The three support plates are arranged alternately, and a moisture-absorbing sponge is provided on the top of the support plate. The top of the three moisture-absorbing sponges respectively contacts the bottom of two support plates and the top of the inner cavity of the dehumidification box.

[0016] A sealed door is hinged to the right side of the enclosure;

[0017] The air inlet groove is in contact with the moisture-absorbing sponge at the top, and both air guide holes are located below the receiving plate at the bottom.

[0018] The present invention is further configured such that: a return box is fixedly connected to the left side of the drying box, the return box and the drying chamber are connected through a return trough, and the return trough is located below the conveyor belt; the front and rear sides of the return box are respectively connected to the interior of two insulation chambers through insulation pipes; an air outlet pipe is connected to the right side of the bottom of the drying box, and the air outlet pipe is connected to the drying chamber.

[0019] A scraper is fixedly connected to the right side of the inner cavity of the drying chamber. The scraper is located below the air inlet groove, and one side of the scraper is in contact with the surface of the conveyor belt. The front and rear sides of the scraper are in contact with the opposite sides of the two partitions, respectively.

[0020] This invention also discloses a method for using a discharge heat energy recovery and utilization device for a pellet mill, specifically including the following steps:

[0021] S1. Feeding: The feed pellet mill extrudes feed through the feed hopper into the cylinder and falls between two feed plates. The feed plates are squeezed by the weight of the feed and begin to rotate downward. When the feed plates rotate to an inclined downward position, the feed between the two feed plates falls onto the conveyor belt through the feed trough. During the process, the drive motor is started, and the drive motor drives the rotating shaft to rotate. The rotating shaft drives the active roller to rotate, and the active roller causes the driven roller to rotate through the conveyor belt. The conveyor belt begins to transport the feed towards the hot air pipe.

[0022] S2. Drying: After the external hot air blower is connected to the hot air pipe, the hot air enters the drying chamber through the hot air pipe to dry the feed during the conveying process. The hot air with the moisture of the feed enters the dehumidification box through the air inlet slot.

[0023] S3. Dehumidification and heat preservation: Hot air containing moisture from the feed passes through three moisture-absorbing sponges in sequence to absorb moisture, resulting in dry hot air. The dry hot air enters the two heat preservation chambers through the air guide holes to keep the drying chambers warm.

[0024] S4, Recirculation Cooling: After the feed conveyed by the conveyor belt is dried by hot air, it falls out of the drying chamber through the discharge pipe. During the process, the hot air in the heat preservation chamber in S3 enters the recirculation box through the heat preservation pipe, and then enters the drying chamber through the recirculation trough to blow air and dissipate heat on the feed during the falling process, and then is discharged from the air outlet pipe.

[0025] (III) Beneficial Effects

[0026] This invention provides a device for recovering and utilizing the discharge heat energy of a pellet mill and its method of use. It has the following beneficial effects:

[0027] (1) The present invention ensures uniform feed distribution by setting up a conveying component and an intermittent feeding component, and dries the feed during the conveying process by setting up a hot air pipe. The drying chamber and the heat preservation chamber are constructed by cooperating with two partitions and a drying box. With the setting up of a dehumidification box, the humid and hot air is effectively dehumidified. With the setting up of the air guide hole, the heat preservation chamber provides good heat preservation support for the drying chamber, realizing the reuse of heat energy.

[0028] (2) The present invention uses the reflux box, reflux trough, heat preservation pipe and air outlet pipe to exchange heat with the dried feed by the reflux hot air, thereby reducing the surface temperature of the dried feed.

[0029] (3) By setting up a cylinder, a feeding hopper, a feeding trough, a rotating rod and a feeding plate, the present invention allows the feeding plate to rotate around the rotating rod by the gravity of the feed particles after the feed particles pressed by the pellet mill are introduced into the feeding hopper. With the setting of the feeding trough, the feed particles are automatically fed intermittently, providing good conditions for drying the feed particles. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the present invention from a top-down perspective;

[0032] Figure 3 This is a schematic diagram of the structure of the conveying component and the partition of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the intermittent feeding assembly of the present invention.

[0035] In the diagram, 1. Drying box; 2. Conveying assembly; 3. Intermittent feeding assembly; 4. Partition; 5. Drying chamber; 6. Insulation chamber; 7. Hot air duct; 8. Dehumidification box; 9. Air inlet trough; 10. Air guide hole; 11. Discharge pipe; 12. Cylinder; 13. Feed hopper; 14. Discharge trough; 15. Rotating rod; 16. Discharge plate; 17. Mounting slot; 18. Drive motor; 19. Rotating shaft; 20. Driving roller; 21. Driven roller; 22. Conveyor belt; 23. Box body; 24. Receiving plate; 25. Moisture-absorbing sponge; 26. Sealing door; 27. Return box; 28. Return trough; 29. ​​Insulation pipe; 30. Air outlet pipe; 31. Scraper. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] Please see Figure 1-5 The present invention provides the following technical solution: a device for recovering and utilizing the discharge heat energy of a pellet mill, comprising a drying chamber 1, a conveying assembly 2, an intermittent material feeding assembly 3, a hot air pipe 7, and a dehumidification chamber 8, wherein a discharge pipe 11 is connected to the left side of the bottom of the drying chamber 1.

[0038] As a preferred embodiment, partitions 4 are fixedly connected to both the front and rear sides of the inner cavity of the drying chamber 1. The two partitions 4 are used to divide the inner cavity of the drying chamber 1 into a drying chamber 5 and two heat preservation chambers 6. The two heat preservation chambers 6 are respectively located on the front and rear sides of the drying chamber 5. Specifically, the intermittent feeding assembly 3 includes a cylinder 12. The top of the drying chamber 1 has an installation groove 17 that communicates with the drying chamber 5. The cylinder 12 is fixedly connected to the inside of the installation groove 17. The left side of the top of the cylinder 12 is connected to a feed hopper 13. The bottom of the cylinder 12 has a discharge groove 14. A rotating rod 15 is rotatably installed inside the cylinder 12. The rotating rod 15 is located on the right side of the feed hopper 13. At least eight discharge plates 16 are fixedly connected to the outer periphery of the rotating rod 15 at even intervals. One side of the discharge plate 16 slides in contact with the inner surface of the cylinder 12.

[0039] As a preferred embodiment, in order to facilitate uniform drying of the falling feed pellets, the conveying assembly 2 is set in the drying chamber 5. The conveying assembly 2 includes a drive motor 18 and two rotating shafts 19. The drive motor 18 is a high-temperature resistant motor, electrically connected to an external power source, and controlled by a control switch. The output end of the drive motor 18 is fixedly connected to one end of a rotating shaft 19 via a coupling. The two ends of the rotating shaft 19 pass through two partitions 4 respectively and extend to opposite sides of the two partitions 4. The drive motor 18 is fixedly connected to the inner wall of the drying chamber 1. The outer periphery of the two rotating shafts 19 is respectively fitted with and fixedly connected to a drive roller 20 and a driven roller 21. The front and rear sides of the drive roller 20 and the driven roller 21 are respectively in contact with opposite sides of the two partitions 4. The drive roller 20 and the driven roller 21 are connected by a conveyor belt 22.

[0040] As a preferred embodiment, in order to achieve the drying process of feed pellets, a hot air pipe 7 is connected to the top left side of the drying box 1 and is connected to the drying chamber 5, and the hot air pipe 7 is located above the conveyor belt 22.

[0041] As a preferred embodiment, a dehumidifying chamber 8 is fixedly connected to the right side of the drying chamber 1, and the dehumidifying chamber 8 and the drying chamber 5 are connected through an air inlet groove 9. The dehumidifying chamber 8 and the two insulation chambers 6 are connected through air guide holes 10. Specifically, the dehumidifying chamber 8 includes a chamber body 23, and a sealing door 26 is hinged to the right side of the chamber body 23. Three supporting plates 24 are fixedly connected between the front and rear sides of the inner cavity of the chamber body 23. The three supporting plates 24 are staggered. A moisture-absorbing sponge 25 is provided on the top of the supporting plate 24. The tops of the three moisture-absorbing sponges 25 are in contact with the bottoms of the two supporting plates 24 and the top of the inner cavity of the dehumidifying chamber 8, respectively. The air inlet groove 9 is in contact with the moisture-absorbing sponge 25 at the top. The two air guide holes 10 are both located below the supporting plate 24 at the bottom.

[0042] As a preferred embodiment, in order to ensure the cooling and temperature reduction of the feed after drying, a return box 27 is fixedly connected to the left side of the drying chamber 1. The return box 27 and the drying chamber 5 are connected through a return channel 28, and the return channel 28 is located below the conveyor belt 22. The front and rear sides of the return box 27 are connected to the interior of the two insulation chambers 6 respectively through insulation pipes 29. An air outlet pipe 30 is connected to the right side of the bottom of the drying chamber 1. The air outlet pipe 30 is connected to the drying chamber 5. In order to avoid heat loss, a scraper 31 is fixedly connected to the right side of the inner cavity of the drying chamber 5. The scraper 31 is located below the air inlet channel 9, and one side of the scraper 31 is in contact with the surface of the conveyor belt 22. The front and rear sides of the scraper 31 are in contact with the opposite sides of the two partitions 4 respectively.

[0043] A method for using a discharge heat recovery and utilization device for a pellet mill specifically includes the following steps:

[0044] S1. Feeding: The feed pellet mill extrudes feed through the feed hopper 13 into the cylinder 12, where it falls between the two feed plates 16. The feed plates 16 are squeezed by the weight of the feed and begin to rotate downwards. When the feed plates 16 rotate to tilt downwards, the feed between the two feed plates 16 falls onto the conveyor belt 22 through the feed trough 14. During the process, the drive motor 18 is started, which drives the rotating shaft 19 to rotate. The rotating shaft 19 drives the drive roller 20 to rotate. The drive roller 20 causes the driven roller 21 to rotate through the conveyor belt 22. The conveyor belt 22 begins to transport the feed toward the hot air pipe 7.

[0045] S2. Drying: After the external hot air blower is connected to the hot air pipe 7, the hot air enters the drying chamber 5 through the hot air pipe 7 to dry the feed during the conveying process. The hot air with the moisture of the feed enters the dehumidification box 8 through the air inlet trough 9.

[0046] S3. Dehumidification and heat preservation: The hot air containing the moisture of the feed passes through three moisture-absorbing sponges 25 in sequence to absorb moisture, and then the dry hot air enters the two heat preservation chambers 6 through the air guide hole 10 to keep the drying chamber 5 warm.

[0047] S4, Recirculation Cooling: After the feed conveyed by the conveyor belt 22 is dried by hot air, it falls out of the drying chamber 5 through the discharge pipe 11. During the process, the hot air in the heat preservation chamber 6 in S3 enters the reflux box 27 through the heat preservation pipe 29, and then enters the drying chamber 5 through the reflux trough 28 to blow air and dissipate heat on the feed during the falling process, and then is discharged from the air outlet pipe 30.

Claims

1. A device for recovering and utilizing the discharge heat energy of a pellet mill, comprising a drying chamber (1) and a conveying assembly (2) disposed in the drying chamber (1), characterized in that: An intermittent feeding assembly (3) is provided on the right side of the top of the drying box (1). Two partitions (4) are fixedly connected to the front and rear sides of the inner cavity of the drying box (1). The two partitions (4) are used to divide the inner cavity of the drying box (1) into a drying cavity (5) and two heat preservation cavities (6). The two heat preservation cavities (6) are respectively located on the front and rear sides of the drying cavity (5). The conveying assembly (2) is located in the drying cavity (5). A hot air pipe (7) connected to the drying cavity (5) is connected to the top left side of the drying box (1). The hot air pipe (7) is located above the conveying assembly (2). A dehumidifying box (8) is fixedly connected to the right side of the drying box (1). The dehumidifying box (8) and the drying cavity (5) are connected through an air inlet groove (9). The dehumidifying box (8) and the two heat preservation cavities (6) are connected through an air guide hole (10). The bottom left side of the drying box (1) is connected to the discharge pipe (11); The conveying assembly (2) includes a drive motor (18) and two rotating shafts (19). The outer periphery of the two rotating shafts (19) is respectively fitted with and fixedly connected to a drive roller (20) and a driven roller (21). The drive roller (20) and the driven roller (21) are connected by a conveyor belt (22). The output end of the drive motor (18) is fixedly connected to one end of one rotating shaft (19) through a coupling. A return box (27) is fixedly connected to the left side of the drying box (1). The return box (27) and the drying chamber (5) are connected by a return groove (28), and the return groove (28) is located below the conveyor belt (22). The front and rear sides of the return box (27) are connected to the interior of two insulation chambers (6) respectively through insulation pipes (29). An air outlet pipe (30) is connected to the right side of the bottom of the drying box (1). The air outlet pipe (30) is connected to the drying chamber (5). A scraper (31) is fixedly connected to the right side of the inner cavity of the drying chamber (5). The scraper (31) is located below the air inlet groove (9), and one side of the scraper (31) is in contact with the surface of the conveyor belt (22). The front and rear sides of the scraper (31) are respectively in contact with the opposite sides of the two partitions (4).

2. The device for recovering and utilizing the discharge heat energy of a pellet mill according to claim 1, characterized in that: The intermittent feeding assembly (3) includes a cylinder (12), a feeding hopper (13) is connected to the left side of the top of the cylinder (12), a feeding groove (14) is opened at the bottom of the cylinder (12), a rotating rod (15) is rotatably installed inside the cylinder (12), and at least eight feeding plates (16) are evenly fixed to the outer periphery of the rotating rod (15), and one side of the feeding plate (16) slides in contact with the inner surface of the cylinder (12); The rotating rod (15) is located on the right side of the feed hopper (13).

3. The device for recovering and utilizing the discharge heat energy of a pellet mill according to claim 2, characterized in that: The top of the drying oven (1) is provided with an installation groove (17), and the cylinder (12) is fixed inside the installation groove (17).

4. The device for recovering and utilizing the discharge heat energy of a pellet mill according to claim 1, characterized in that: The front and rear sides of the driving roller (20) and the driven roller (21) are respectively in contact with the opposite side of the two partitions (4). The two ends of the rotating shaft (19) pass through the two partitions (4) respectively and extend to the opposite side of the two partitions (4). The drive motor (18) is fixed to the inner wall of the drying oven (1).

5. The device for recovering and utilizing the discharge heat energy of a pellet mill according to claim 1, characterized in that: The dehumidification box (8) includes a box body (23), and three support plates (24) are fixedly connected between the front and rear sides of the inner cavity of the box body (23). The three support plates (24) are staggered. A moisture-absorbing sponge (25) is provided on the top of the support plate (24). The top of the three moisture-absorbing sponges (25) respectively contacts the bottom of the two support plates (24) and the top of the inner cavity of the dehumidification box (8). A sealing door (26) is hinged to the right side of the box (23). The air inlet groove (9) is in contact with the moisture-absorbing sponge (25) set at the top, and the two air guide holes (10) are both set below the receiving plate (24) set at the bottom.

6. The method of using the discharge heat recovery and utilization device for a pellet mill according to claim 5, characterized in that: Specifically, the following steps are included: S1, Feeding: The feed extruded by the feed pellet mill enters the cylinder (12) through the feed hopper (13) and falls between the two feed plates (16). The feed plates (16) are squeezed by the gravity of the feed and begin to rotate downward. When the feed plates (16) rotate to the point of tilting downward, the feed between the two feed plates (16) falls onto the conveyor belt (22) through the feed trough (14). During the process, the drive motor (18) is started. The drive motor (18) drives the rotating shaft (19) to rotate. The rotating shaft (19) drives the active roller (20) to rotate. The active roller (20) causes the driven roller (21) to rotate through the conveyor belt (22). The conveyor belt (22) begins to transport the feed towards the hot air pipe (7). S2, Drying: After the external hot air blower is connected to the hot air pipe (7), the hot air enters the drying chamber (5) through the hot air pipe (7) to dry the feed during the conveying process. The hot air with the moisture of the feed enters the dehumidification box (8) through the air inlet slot (9). S3, Dehumidification and heat preservation: The hot air containing the moisture of the feed passes through three moisture-absorbing sponges (25) in sequence to absorb moisture and obtain dry hot air. The dry hot air enters the two heat preservation chambers (6) through the air guide hole (10) to keep the dry chamber (5) warm. S4, reflux cooling: After the feed conveyed by the conveyor belt (22) is dried by hot air, it falls out of the drying chamber (5) from the discharge pipe (11). During the process, the hot air in the heat preservation chamber (6) in S3 enters the reflux box (27) through the heat preservation pipe (29), and then enters the drying chamber (5) through the reflux trough (28) to blow air and dissipate heat on the feed during the falling process, and then is discharged from the air outlet pipe (30).

Images