Energy-saving grain dryer capable of recycling heat

Abstract

This invention discloses an energy-saving grain dryer with heat recycling technology in the field of grain processing. It includes a dryer body, with a first conveyor belt fixedly connected to one end and a second conveyor belt fixedly connected to the other end. The dryer body is internally equipped with a graded transport component. This invention uses the graded transport component to transport grain in grades within the space of the conveyor belts, making full use of the space inside the conveyor belts and allowing the grain to dry for a longer time. A controlled dehumidification component uses a first and second roller to alternately absorb water from the grain surface, removing moisture from damp grains before drying. After the first roller detaches from contact with the grain, it can still be dried inside the dryer body. Once the second roller becomes damp, it can be replaced with a dry first roller for reuse, thus completing the cycle and further improving the grain drying effect.

Description

Technical Field

[0001] This invention relates to the field of grain processing technology, specifically to an energy-saving grain dryer that utilizes heat recycling. Background Technology

[0002] After grains mature, they need to be harvested from the fields and are called raw grains. Raw grains are then processed into semi-finished grains and finished grains. A common processing method is drying, which removes moisture from the grains so that they can be stored for a longer period of time without spoiling.

[0003] Existing grain drying equipment mostly uses conveyor belts to transport grain to the heating equipment for direct drying. However, drying grain by spreading it flat on the conveyor belt is not ideal. The grain spends a short time inside the drying equipment, and extending the heating time will result in uneven drying of the grain on the surface and bottom of the conveyor belt, which will negatively impact the drying effect.

[0004] Based on this, the present invention designs an energy-saving grain dryer that can recycle heat, in order to solve the problem that the drying effect of directly feeding grain into the dryer through a conveyor belt is not good. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving grain dryer that can recycle heat, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving grain dryer that utilizes heat recycling, comprising a dryer body, a first conveyor belt fixedly connected to one end of the dryer body, a second conveyor belt fixedly connected to the other end of the dryer body, and a graded transport component provided inside the dryer body. The graded transport component is used to transfer the grain transported in the dryer body and then transport it out from inside the dryer body through the second conveyor belt, so that the grain is heated more fully inside the dryer body.

[0007] As a further embodiment of the present invention, the graded transport assembly includes a first auger, which is fixedly installed inside the dryer body above the first conveyor belt. A first feed inlet is located at the bottom of the first auger, and a first feeding plate extending upwards from its right end is fixedly connected to the bottom of the first feed inlet. A second auger is fixedly connected to one side of the first conveyor belt, and a second feed inlet is located at the bottom of the second auger, connecting to the first conveyor belt. A second discharge outlet is located in the middle of the second auger, and the right end of the first feeding plate is fixedly connected to the bottom of the second discharge outlet. A third feed inlet is located on the second auger, and a second feeding plate extending upwards from its left end is fixedly connected to one end of the third feed inlet. A first discharge outlet is located at the top of the first auger, and the left end of the second feeding plate is fixedly connected to the first discharge outlet. A discharge pipe is connected to the top of the second auger, and the bottom opening of the discharge pipe is located directly above the second conveyor belt. A volume control and dehumidification assembly is installed on the first conveyor belt, which is used to control the transport volume of grain on the first conveyor belt and to dehumidify the grain.

[0008] As a further embodiment of the present invention, the controlled-volume dehumidification assembly includes a first transmission belt, the bottom of which is connected to a rotating shaft on the first conveyor belt. A transmission shaft is rotatably connected inside the dryer body. The top of the first transmission belt is sleeved on the outside of the transmission shaft. A connecting plate is rotatably connected to the transmission shaft. Connecting rods are rotatably connected to the left and right ends of the connecting plate, respectively. A first drum and a second drum are respectively sleeved on the outside of the two connecting rods. A hinge is connected to both connecting rods. An incomplete gear is fixedly connected to the connecting rod. A limiting plate is fixedly connected to the inner wall of the dryer body. One end of the limiting plate is fixedly connected to... A fixed rack capable of meshing with an incomplete gear; a closed slide groove is provided on one side of the limiting plate; one end of the connecting rod is connected to the closed slide groove; a second retaining shaft is rotatably connected to the left end of the closed slide groove; a first retaining shaft is rotatably connected to the top of the closed slide groove; a return spring is slidably connected to the connecting rod; a stop block that fits against the upper outer wall of the limiting plate is fixedly connected to the top of the return spring; a fixed plate is slidably connected to the top of the stop block; a second limiting frame symmetrical to the first limiting frame is slidably connected to the left end of the fixed plate; protrusions are fixedly connected to both the first and second limiting frames; and a transmission plate is slidably connected inside the dryer body.

[0009] As a further embodiment of the present invention, the second limiting frame, the transmission plate, and the top of the protrusion are on the same horizontal plane.

[0010] As a further aspect of the present invention, the first roll is made of a water-absorbing material.

[0011] As a further embodiment of the present invention, the inner walls of the first feeding plate and the second feeding plate are both smooth walls, and the inclination angles of the first feeding plate and the second feeding plate are the same.

[0012] As a further embodiment of the present invention, one end of the first and second retaining shafts is rotatably connected with a torsion spring for resetting.

[0013] As a further aspect of the present invention, the first auger and the second auger are made of a metal material with high thermal conductivity.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention uses a graded transport component to transport grain in grades within the space of a conveyor belt, making full use of the space inside the conveyor belt, allowing the grain to dry for a longer time without slowing down the efficiency of grain transport, and further improving the drying effect of the grain.

[0016] 2. This invention uses a controlled-volume dehumidification component to alternately absorb water from the surface of grain using a first and a second roller. This removes moisture from the surface of damp grain before drying. After the first roller is removed from contact with the grain, it can be dried inside the dryer. Once the second roller becomes damp, it can be replaced with a dry first roller for reuse, thus completing the cycle and further improving the drying effect of the grain. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the dryer.

[0019] Figure 3 This is a schematic diagram of the structure of the graded transportation components;

[0020] Figure 4 A schematic diagram of the dehumidification control component;

[0021] Figure 5 This is a schematic diagram of the dehumidification control assembly (the first transmission belt, connecting plate, and first drum are hidden).

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Dryer body; 2. First conveyor belt; 3. Second conveyor belt; 4. First auger; 41. First feed inlet; 42. First discharge outlet; 5. Second auger; 51. Second feed inlet; 52. Second discharge outlet; 53. Third feed inlet; 6. First feeding plate; 7. Second feeding plate; 8. Discharge pipe; 9. Fixed plate; 10. First limiting frame; 11. Limiting plate; 12. First retaining shaft; 13. Closed slide groove; 14. Fixed rack; 15. First drum; 16. Second drum; 17. First transmission belt; 18. Transmission shaft; 19. Connecting plate; 20. Hinge; 21. Stop block; 22. Second retaining shaft; 23. Second limiting frame; 24. Transmission plate; 25. Protrusion; 26. Return spring; 27. Incomplete gear; 28. Connecting rod. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0025] Please see Figures 1-5 The present invention provides a technical solution: an energy-saving grain dryer that can recycle heat, including a dryer body 1, a first conveyor belt 2 fixedly connected to one end of the dryer body 1, a second conveyor belt 3 fixedly connected to the other end of the dryer body 1, and a graded transport component provided inside the dryer body 1. The graded transport component is used to transfer the grain transported by the dryer body 1 and then transport it out from inside the dryer body 1 through the second conveyor belt 3, so that the grain is heated more fully inside the dryer body 1.

[0026] When the above scheme is put into actual use, the grain to be dried is placed on the fixed frame 2 and transported to the inside of the conveyor belt 1 for drying and heating. Then, the grading and transporting component further transfers the grain inside the conveyor belt 1, and finally discharges it from the inside of the conveyor belt 1 through the mold 3. The advantage of doing this is that by grading and transporting the grain in stages within the space of the conveyor belt 1, the space inside the conveyor belt 1 is fully utilized, allowing the grain to dry for a longer time inside the conveyor belt 1 without slowing down the efficiency of grain transport, and further improving the drying effect of the grain.

[0027] As a further embodiment of the present invention, the graded transport assembly includes a first auger 4, which is fixedly disposed inside the dryer body 1 above the first conveyor belt 2. The first auger 4 has a first feed inlet 41 at its bottom, and a first feeding plate 6 extending upward from its right end is fixedly connected to the bottom of the first feed inlet 41. A second auger 5 is fixedly connected to one side of the first conveyor belt 2. The second auger 5 has a second feed inlet 51 at its bottom that connects to the first conveyor belt 2, and a second discharge outlet 52 in its middle. The right end of the first feeding plate 6 is connected to the second discharge outlet 52. The bottom end is fixedly connected, and the second auger 5 is provided with a third feed port 53. One end of the third feed port 53 is fixedly connected to a second feeding plate 7 extending upward from the left end. The top of the first auger 4 is provided with a first discharge port 42. The left end of the second feeding plate 7 is fixedly connected to the first discharge port 42. The top of the second auger 5 is connected to a discharge pipe 8. The bottom opening of the discharge pipe 8 is located directly above the second conveyor belt 3. The first conveyor belt 2 is provided with a quantity control and dehumidification component. The quantity control and dehumidification component is used to control the amount of grain transported on the first conveyor belt 2 and to dehumidify the grain.

[0028] When the above scheme is put into actual use, the grain is transported by the first conveyor belt 2 and enters the second auger 5 through the second feed inlet 51. The second auger 5 transports the grain upward and discharges it through the second discharge outlet 52. The discharged grain passes through the first feeding plate 6 and enters the first auger 4 through the first feed inlet 41. It is then transported upward by the first auger 4 and discharged through the first discharge outlet 42. The discharged grain passes through the second feeding plate 7 and returns to the second auger 5 through the third feed inlet 53. It continues to be transported upward by the second auger 5 and transported through the discharge pipe 8 to the second conveyor belt 3. Finally, it is transported to the outside of the dryer body 1 by the second conveyor belt 3. The advantage of this is that the grain is fully dried inside the dryer body 1 by spiral transport of the grain by the first auger 4 and the second auger 5, and the drying effect of the grain can be greatly improved in a single drying.

[0029] As a further embodiment of the present invention, the controlled-volume dehumidification assembly includes a first transmission belt 17, the bottom of which is connected to a rotating shaft on a first conveyor belt 2. A transmission shaft 18 is rotatably connected inside the dryer body 1. The top of the first transmission belt 17 is sleeved on the outside of the transmission shaft 18. A connecting plate 19 is rotatably connected to the transmission shaft 18. Connecting rods 28 are rotatably connected to the left and right ends of the connecting plate 19, respectively. A first roller 15 and a second roller 16 are respectively sleeved on the outside of the two connecting rods 28. A hinge 20 is connected to both connecting rods 28. An incomplete gear 27 is fixedly connected to the connecting rods 28. A limiting plate 11 is fixedly connected to the inner wall of the dryer body 1. A fixed rack 14 capable of meshing with the incomplete gear 27 is fixedly connected to one end of the limiting plate 11. A closed slide groove 13 is provided on one side. One end of the connecting rod 28 is connected to the closed slide groove 13. A second retaining shaft 22 is rotatably connected to the left end of the closed slide groove 13. A first retaining shaft 12 is rotatably connected to the top of the closed slide groove 13. A return spring 26 is slidably connected to the connecting rod 28. A stop block 21 that fits against the upper outer wall of the limiting plate 11 is fixedly connected to the top of the return spring 26. A fixing plate 9 is slidably connected to the top of the stop block 21. A second limiting frame 23 symmetrical to the first limiting frame 10 is slidably connected to the left end of the fixing plate 9. A protrusion 25 is fixedly connected to both the first limiting frame 10 and the second limiting frame 23. A transmission plate 24 is slidably connected inside the dryer body 1. The tops of the second limiting frame 23, the transmission plate 24, and the protrusion 25 are on the same horizontal plane. The first roll 15 is made of absorbent material.

[0030] When the above solution is put into practical use, such as Figure 4-5As shown, when the first conveyor belt 2 rotates to feed material, the first conveyor belt 2 drives the drive shaft 18 to rotate via the first transmission belt 17. The drive shaft 18 drives the hinge 20 to rotate, and the hinge 20 drives the two connecting rods 28 at both ends to rotate. The connecting rods 28 drive the first drum 15 to rotate. The surface of the first drum 15 contacts the grain, and the rotation and compression prevent the grain thickness on the first conveyor belt 2 from being too thick, thus improving the drying effect of the grain. At the same time, the contact and compression between the first drum 15 and the grain surface absorbs the moisture from the surface of the grain into the interior of the first drum 15. When the connecting rods 28 rotate, they drive the incomplete gear 27 to rotate as well. The incomplete gear 27 drives the fixed rack 14 to slide, and the fixed rack 14 drives the limiting gear 27 to rotate as well. The position plate 11 slides together with the limiting plate 11. When the limiting plate 11 slides, it will push the stop block 21 to slide upward. The stop block 21 slides vertically with the inner wall of the dryer body 1. The upward sliding of the stop block 21 will stretch the protrusion 25, so that the stop block 21 slides down when the incomplete gear 27 is not engaged with the fixed rack 14, causing the limiting plate 11 and the fixed rack 14 to retract. However, the retraction distance is less than the distance that the limiting plate 11 slides when the incomplete gear 27 engages with the fixed rack 14. The connecting rod 28 continues to rotate, so that the incomplete gear 27 drives the fixed rack 14 and the limiting plate 11 to slide one end of the distance. At this time, the top of the stop block 21 contacts the first limiting frame 10 and pushes the bottom inclined wall of the first limiting frame 10, so that the first The limiting frame 10 slides to one side, and the stop block 21 continues to move upward and contacts the protrusion 25. The protrusion 25 pushes the first limiting frame 10 to slide in the opposite direction. At this time, the sliding direction of the protrusion 25 will push the transmission plate 24 to slide. The transmission plate 24 pushes the second limiting frame 23 to slide, so that the stop block 21 inside the second limiting frame 23 contacts the protrusion 25 and is pushed downward by the protrusion 25 to disengage from the inside of the first limiting frame 10. At this time, the connecting rod 28 has slid to one end of the closed slide groove 13. Under the pulling force of the return spring 26 and the restriction effect of the bottom outer wall of the first limiting frame 10 on the stop block 21, the connecting rod 28 will be stretched upward by the return spring 26, and the stop block 21 on the other side has disengaged from the second limiting frame. The docking of 23 and the rotation of the connecting plate 19 cause the horizontal heights of the first drum 15 and the second drum 16 to be reversed, so that the second drum 16 comes into contact with the grain on the first conveyor belt 2 and squeezes and absorbs water. The purpose of this is that if the surface of the grain to be dried is relatively wet, the surface of the first drum 15 will also become wet after absorbing water through the first drum 15. At this time, the water absorption capacity of the first drum 15 on the grain will decrease. However, after replacing the second drum 16, it can start absorbing water again. After the first drum 15 is no longer in contact with the grain, it can be dried inside the dryer body 1. When the second drum 16 becomes wet, it can be replaced with a dry first drum 15 to absorb water again, thus completing the cycle and further improving the drying effect of the grain.

[0031] As a further embodiment of the present invention, the inner walls of the first feeding plate 6 and the second feeding plate 7 are both smooth walls, and the inclination angles of the first feeding plate 6 and the second feeding plate 7 are the same.

[0032] When the above solution is put into actual use, the grain on the first feeding plate 6 and the second feeding plate 7 flows smoothly along the inclined wall, and will not stagnate on the surface of the first feeding plate 6 and the second feeding plate 7.

[0033] As a further embodiment of the present invention, one end of the first retaining shaft 12 and the second retaining shaft 22 are respectively rotatably connected with a torsion spring for resetting.

[0034] When the above scheme is put into actual use, the first retaining shaft 12 and the second retaining shaft 22 are only used to restrict the sliding path of the connecting rod 28 inside the closed slide groove 13, so that the connecting rod 28 can only rotate counterclockwise along the closed slide groove 13.

[0035] As a further embodiment of the present invention, the first auger 4 and the second auger 5 are made of a metal material with high thermal conductivity;

[0036] When the above solution is put into actual use, the high thermal conductivity makes the first auger 4 and the second auger 5 have a relatively high temperature inside the dryer body 1, which can also dry the grain inside.

[0037] Working principle: The grain to be dried is placed on the fixed frame 2, and then transported through the fixed frame 2 to the inside of the conveyor belt 1 for drying and heating.

[0038] When the first conveyor belt 2 rotates to feed material, it drives the drive shaft 18 to rotate via the first transmission belt 17. The drive shaft 18 drives the hinge 20 to rotate, which in turn drives the two connecting rods 28 at both ends to rotate. The connecting rods 28 drive the first drum 15 to rotate. The surface of the first drum 15 contacts the grain, and the rotation and compression prevent the grain from becoming too thick on the first conveyor belt 2, thus improving the drying effect. At the same time, the contact and compression between the first drum 15 and the grain surface absorbs moisture from the grain into the drum 15. Furthermore, the rotation of the connecting rods 28 drives the incomplete gear 27 to rotate as well. The incomplete gear 27 drives the fixed rack 14 to slide, and the fixed rack 14... The limiting plate 11 slides together with the limiting plate 11. When the limiting plate 11 slides, it pushes the stop block 21 to slide upward. The stop block 21 slides vertically with the inner wall of the dryer body 1. The upward sliding of the stop block 21 stretches the protrusion 25, causing the stop block 21 to slide down again when the incomplete gear 27 is not engaged with the fixed rack 14. This causes the limiting plate 11 and the fixed rack 14 to retract, but the retraction distance is less than the distance that the limiting plate 11 slides when the incomplete gear 27 engages with the fixed rack 14. The connecting rod 28 continues to rotate, causing the incomplete gear 27 to drive the fixed rack 14 and the limiting plate 11 to slide one end of the distance. At this time, the top of the stop block 21 contacts the first limiting frame 10 and pushes the bottom of the first limiting frame 10. The inclined wall causes the first limiting frame 10 to slide to one side. The stop block 21 continues to move upward and contacts the protrusion 25. The protrusion 25 pushes the first limiting frame 10 to slide in the opposite direction. At this time, the sliding direction of the protrusion 25 will push the transmission plate 24 to slide. The transmission plate 24 pushes the second limiting frame 23 to slide, so that the stop block 21 inside the second limiting frame 23 contacts the protrusion 25 and is pushed downward by the protrusion 25 to disengage from the inside of the first limiting frame 10. At this time, the connecting rod 28 has slid to one end of the closed slide groove 13. Under the pulling force of the return spring 26 and the restriction effect of the bottom outer wall of the first limiting frame 10 on the stop block 21, the connecting rod 28 will be stretched upward by the return spring 26, and the other side... The stop block 21 has disengaged from the docking with the second limit frame 23. The connecting plate 19 rotates to reverse the horizontal height of the first drum 15 and the second drum 16, so that the second drum 16 contacts the grain on the first conveyor belt 2 and squeezes and absorbs water. The purpose of this is that if the surface of the grain to be dried is relatively wet, the surface of the first drum 15 will also become wet after absorbing water through the first drum 15. At this time, the water absorption effect of the first drum 15 on the grain will decrease. After replacing the second drum 16, it can start absorbing water again. After the first drum 15 is no longer in contact with the grain, it can be dried inside the dryer body 1. After the second drum 16 becomes wet, the dry first drum 15 can be replaced and reused.

[0039] The grain is transported by the first conveyor belt 2 and enters the second auger 5 through the second feed inlet 51. The second auger 5 transports the grain upward and discharges it through the second discharge outlet 52. The discharged grain passes through the first feeding plate 6 and enters the first auger 4 through the first feed inlet 41. It is then transported upward through the first auger 4 and discharged through the first discharge outlet 42. The discharged grain passes through the second feeding plate 7 and enters the second auger 5 through the third feed inlet 53. It continues to be transported upward through the second auger 5 and through the discharge pipe 8 to the second conveyor belt 3. Finally, it is transported to the outside of the dryer body 1 through the second conveyor belt 3.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An energy-saving grain dryer with heat recycling capability, comprising a dryer body (1), wherein a first conveyor belt (2) is fixedly connected to one end of the dryer body (1), and a second conveyor belt (3) is fixedly connected to the other end of the dryer body (1), characterized in that: The dryer body (1) is equipped with a graded transport component inside. The graded transport component is used to transfer the grain transported by the dryer body (1) and then transport it out from the inside of the dryer body (1) through the second conveyor belt (3), so that the grain is heated more fully inside the dryer body (1). A dehumidification control assembly is provided on the first conveyor belt (2). The dehumidification control assembly is used to control the amount of grain transported on the first conveyor belt (2) and to dehumidify the grain. The dehumidification control assembly includes a first transmission belt (17). The bottom of the first transmission belt (17) is connected to the rotating shaft on the first conveyor belt (2). A transmission shaft (18) is rotatably connected inside the dryer body (1). The top of the first transmission belt (17) is sleeved on the outside of the transmission shaft (18). A connecting plate (19) is rotatably connected on the transmission shaft (18). A connecting rod (28) is rotatably connected to the left and right ends of the connecting plate (19). A first drum (15) and a second drum (16) are respectively sleeved on the outside of the two connecting rods (28). A hinge (20) is connected to both connecting rods (28). An incomplete gear (27) is fixedly connected to the connecting rod (28). A limit plate (11) is fixedly connected to the inner wall of the dryer body (1). One end of the limiting plate (11) is fixedly connected to a fixed rack (14) capable of meshing with an incomplete gear (27). A closed slide groove (13) is provided on one side of the limiting plate (11). One end of the connecting rod (28) is connected to the closed slide groove (13). A second retaining shaft (22) is rotatably connected to the left end of the closed slide groove (13). A first retaining shaft (12) is rotatably connected to the top of the closed slide groove (13). A return spring (26) is slidably connected to the connecting rod (28). The top of the reset spring (26) is fixedly connected to a stop block (21) that fits against the upper outer wall of the limiting plate (11). The top of the stop block (21) is slidably connected to a fixing plate (9). The left end of the fixing plate (9) is slidably connected to a second limiting frame (23) symmetrical to the first limiting frame (10). The first limiting frame (10) and the second limiting frame (23) are respectively fixedly connected to protrusions (25). The inside of the dryer body (1) is slidably connected to a transmission plate (24).

2. The energy-saving grain dryer with heat recycling according to claim 1, characterized in that: The graded transport assembly includes a first auger (4), which is fixedly installed inside the dryer body (1) above the first conveyor belt (2). The first auger (4) has a first feed inlet (41) at its bottom, and a first feeding plate (6) extending upward from the right end is fixedly connected to the bottom of the first feed inlet (41). A second auger (5) is fixedly connected to one side of the first conveyor belt (2). The second auger (5) has a second feed inlet (51) at its bottom that connects to the first conveyor belt (2), and a second discharge outlet in the middle of the second auger (5). (52) The right end of the first feeding plate (6) is fixedly connected to the bottom end of the second discharge port (52). The second auger (5) is provided with a third feeding port (53). One end of the third feeding port (53) is fixedly connected to a second feeding plate (7) extending upward from the left end. The top of the first auger (4) is provided with a first discharge port (42). The left end of the second feeding plate (7) is fixedly connected to the first discharge port (42). The top of the second auger (5) is connected to a discharge pipe (8). The bottom opening of the discharge pipe (8) is located directly above the second conveyor belt (3).

3. The energy-saving grain dryer with heat recycling according to claim 1, characterized in that: The tops of the second limiting frame (23), transmission plate (24) and protrusion (25) are on the same horizontal plane.

4. The energy-saving grain dryer with heat recycling as described in claim 1, characterized in that: The first roll (15) is made of absorbent material.

5. The energy-saving grain dryer with heat recycling according to claim 2, characterized in that: The inner walls of the first feeding plate (6) and the second feeding plate (7) are both smooth walls, and the inclination angles of the first feeding plate (6) and the second feeding plate (7) are the same.

6. The energy-saving grain dryer with heat recycling according to claim 1, characterized in that: Both the first retaining shaft (12) and the second retaining shaft (22) have a torsion spring rotatably connected to one end for resetting.

7. The energy-saving grain dryer with heat recycling according to claim 2, characterized in that: The first auger (4) and the second auger (5) are made of metal materials with high thermal conductivity.

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