Energy-saving grain dryer with waste heat recycling function

Abstract

The present application belongs to the technical field of grain drying machine, and discloses an energy-saving grain drying machine with reusable waste heat, which comprises a base, and a pressurizing device and a box body are fixedly installed at both ends of the top of the base respectively. The bottom of the inner cavity of the box body is provided with a drying bin, the bottom of the drying bin is provided with a material conveying device, the top of the material conveying device is movably provided with a rotating device, and a heating device and a pressurizing device are arranged on the side of the box body. The heat is sent to the rotating device in the form of high pressure through the heat pipe and the heat jet head by the pressurizing device, so that the rotating device is dragged to rotate. The material conveying device at the bottom is dragged to work by the rotating device, the grain falling from the top hopper is conveyed to the top, and then is scattered on the grain scattering base, falls down and meets the hot air flow passing through the rotating device at the top, so that the moisture evaporation of the grain is accelerated, the grain processing is more uniform, and the quality of the grain processing is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of grain dryers, specifically an energy-saving grain dryer that can reuse waste heat. Background Technology

[0002] As a major agricultural country, my country produces a wide variety of grains, including rice, barley, corn, and beans. Grains typically contain a significant amount of moisture after production, so they need to be dried for preservation. However, with the development of science and technology, grain dryers have become increasingly popular. Grain dryers are unaffected by weather conditions and can dry grains even in rainy weather. Moreover, grain dryers offer fast drying speeds and high efficiency.

[0003] Chinese invention patent CN110608593A discloses a rice dryer, belonging to the field of rice processing equipment. The rice dryer includes a frame, a housing mounted on the frame, a drive motor and gears connected to the drive motor on the top of the housing, and a stirring wheel inside the housing. The stirring wheel includes a drive shaft and blades mounted on the drive shaft, with the drive shaft connected to the gears. The housing has an air inlet and an air outlet. The rice dryer also includes a hot air blower and a heater. The hot air blower is connected to both the air inlet and outlet, and the blades are electrically connected to the heater. This rice dryer fully utilizes the residual heat of the air at the outlet, reducing heat loss. Simultaneously, because hot air cannot easily pass through the areas blocked by the blades, rice adjacent to the blades is difficult to dry, requiring extended drying time to ensure drying quality. This rice dryer heats the blades with a heater, allowing the hot blades to dry the rice adjacent to them during rotation, thus improving drying efficiency.

[0004] When using the aforementioned grain dryer, the grain is directly fed into the dryer and falls onto the arc-shaped plate. The grain is then dispersed through the holes on the arc-shaped plate, thereby accelerating the dissipation of water vapor. However, after the grain is directly fed into the dryer, it will pile up inside. This dense accumulation of grain will result in uneven heating of the grain, leading to incomplete drying. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving grain dryer that can reuse waste heat, in order 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 with reusable waste heat, comprising a base, a pressurizing device and a housing respectively fixedly installed at both ends of the top of the base, a rotating groove opened on the back side of the housing, a heating device fixedly connected to the top of the pressurizing device, a hopper fixedly installed on the top of the housing, a drying chamber fixedly installed at the bottom of the inner cavity of the housing, a material feeding device fixedly installed on the top of the drying chamber, a rotating device movably installed on the top of the material feeding device, a heat supply pipe provided on the top of the rotating device, the heat supply pipe being fixedly connected to the housing through a pipe, and hot nozzles fixedly installed in a circular array at the bottom of the heat supply pipe, and an outer shell covering the outside of the equipment. (During operation, the equipment first uses a suction device to transfer the residual heat from the chamber back into the chamber to dry the grain falling from the hopper before it enters the drying chamber. Then, a pressurizing device pressurizes the hot airflow generated by the heating device and sends it into the chamber to drive the impeller. The impeller then drives the auger at the bottom to rotate, transporting the grain from the drying chamber up and then down. The grain then merges with the hot airflow passing through the impeller and guide ring, undergoing a second drying process, thereby accelerating the evaporation of water from the grain.)

[0007] Preferably, the feeding device includes a feeding pipe, an auger, and a bulk material base. The feeding pipe is fixedly installed inside the drying chamber by a fixing ring. The auger is movably installed at the center of the bottom of the drying chamber. The bulk material base is fixedly installed on the top of the feeding pipe.

[0008] Preferably, the rotating device includes an impeller, a guide ring, and a sliding cover. The guide ring is fixedly installed at the bottom of the impeller, the sliding cover is fixedly installed at the center of the top of the impeller, and the center of the bottom of the impeller is fixedly connected to the top of the auger.

[0009] Preferably, the air outlet of the heat nozzle at the bottom of the heat supply pipe blows towards the blades of the impeller, and the heat nozzle is inclined at the bottom of the heat supply pipe and perpendicular to the blades of the impeller.

[0010] Preferably, a discharge hopper is fixedly installed at the bottom of the hopper, a hopper base is fixedly installed in the middle of the discharge hopper, a baffle plate is hinged to the inner wall of the discharge hopper, and springs are fixedly connected to the four inner walls of the discharge hopper cavity, with the springs fixedly connected between the baffle plate and the inner wall of the discharge hopper.

[0011] Preferably, a suction device is fixedly installed on the side wall of the box, and the suction device is fixedly connected to the box and the return base through two return pipes respectively.

[0012] Preferably, a reflux base is provided in the middle of the hopper base, and reflux nozzles are fixedly connected to all four sides of the reflux base, with the air outlet of the reflux nozzles facing the bottom of the baffle plate.

[0013] Preferably, a pair of sealing plates are movably installed at the bottom of the drying chamber. A limiting ring is fixedly connected to the bottom of the sealing plate. The outer end of a torsion spring is fixedly connected to the inner side of the limiting ring. The inner end of the torsion spring is fixedly connected to the bottom of the drying chamber. A pair of sweeping plates are movably installed at the top of the sealing plate. The sweeping plates are fixedly connected to the bottom of the auger.

[0014] Preferably, a handle is fixedly connected to the outer side of the limiting ring, a limiting baffle is fixedly connected to the side of the handle, a feeding pipe is fixedly connected to the bottom of the drying chamber, a sliding groove is provided on the side wall of the feeding pipe, the limiting baffle is rotatably engaged in the sliding groove, and the handle passes through the feeding pipe and the inner wall of the box and is movably engaged in the feeding device.

[0015] Preferably, a viewing window is fixedly installed on the front of the box, a material discharge bin is slidably installed in the inner cavity of the base at the bottom of the box, a storage bin is opened on the inner wall of the front of the base, and a sliding door is slidably installed inside the storage bin, the sliding door being located on the front of the material discharge bin.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention features a drying chamber at the bottom of the inner cavity of a container, a material feeding device at the bottom of the drying chamber, a rotating device movably mounted on top of the material feeding device, a heat supply pipe and a hot nozzle fixedly mounted on top of the rotating device, and a heating device and a pressurizing device on the side of the container. The pressurizing device delivers heat through the heat supply pipe and hot nozzle, blowing hot air at high pressure onto the rotating device, thereby driving the rotating device to rotate. The rotating device then drives the material feeding device at the bottom to transport the grain dropped from the top hopper to the top, where it spreads out on the bulk material top seat, falls down, and merges with the hot air flow from the rotating device. This accelerates the evaporation of moisture from the grain, makes the grain processing more uniform, and improves the quality of grain processing.

[0018] A discharge hopper is installed at the bottom of the hopper, and a bulk material base is installed in the middle of the discharge hopper. A baffle plate is hinged to the inner side of the discharge hopper and supported by springs, so that the baffle plate contacts the side wall of the bulk material base. A return base is installed at the bottom of the bulk material base, and return nozzles are installed on the four sides of the return base. A suction device is installed on the side of the box. The suction device is connected to the box through a return pipe, and the suction device is fixedly connected to the return base through the return pipe. When the equipment is working, the suction device will send the heat in the box to the return nozzle through the return pipe. The return nozzle blows air onto the baffle plate, which will compress the spring on the side of the baffle plate, thereby causing the grain on the top to fall off with a shaking motion. While controlling the uniform feeding of grain, the grain is dried once, improving the drying efficiency of the grain.

[0019] A pair of sealing plates are installed at the bottom of the drying chamber to block the discharge port. The two sealing plates are connected together by a fixing ring, and a torsion spring is installed in the middle of the fixing ring. The torsion spring causes the sealing plates to block the discharge port. Then, the baffle plate is moved by the handle on the outside of the baffle plate to release the grain in the drying chamber. A sweeping plate is installed at the bottom of the auger. During the rotation of the auger, it can push the grain accumulated on the baffle plate to the discharge port and then discharge it through the discharge port, thus facilitating the discharge of the dried grain. The entire box is powered by hot air, which eliminates the need for a separate power source and reduces the cost of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the side structure of the present invention;

[0023] Figure 4 This is a side sectional view of the present invention;

[0024] Figure 5 For the present invention Figure 3 Enlarged view of point A;

[0025] Figure 6 This is a schematic diagram of the internal structure of the housing of the present invention;

[0026] Figure 7 This is a front sectional view of the housing of the present invention;

[0027] Figure 8 This is an exploded view of the internal structure of the box of the present invention;

[0028] Figure 9 This is a cross-sectional view of the top structure of the present invention;

[0029] Figure 10 For the present invention Figure 8 Enlarged diagram of point B.

[0030] In the diagram: 1-Base; 2-Box; 201-Viewing window; 202-Rotating trough; 3-Pressure device; 4-Heating device; 5-Hopper; 501-Discharge hopper; 6-Suction device; 601-Return pipe; 7-Handle; 8-Sliding door; 9-Rotating device; 901-Impeller; 902-Guide ring; 903-Sliding cover; 10-Drying chamber; 11-Material feeding device; 111-Feeding pipe; 12-Auger; 113-Bulk material base; 12-Discharge bin; 13-Hopper base; 14-Heating pipe; 15-Heat nozzle; 16-Spring; 17-Baffle plate; 19-Recirculation base; 20-Recirculation nozzle; 21-Blocking plate; 22-Sweeping plate; 23-Collection bin; 24-Fixing ring; 25-Discharge pipe; 26-Groove; 27-Torsion spring; 28-Limiting ring; 29-Limiting baffle. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-10 This invention provides a technical solution: an energy-saving grain dryer with reusable waste heat, comprising a base 1, a pressurizing device 3 and a housing 2 fixedly installed at both ends of the top of the base 1, a rotating groove 202 opened on the back side of the housing 2, a heating device 4 fixedly connected to the top of the pressurizing device 3, a hopper 5 fixedly installed on the top of the housing 2, a drying chamber 10 fixedly installed at the bottom of the inner cavity of the housing 2, a feeding device 11 fixedly installed on the top of the drying chamber 10, a rotating device 9 movably installed on the top of the feeding device 11, a heat supply pipe 14 provided on the top of the rotating device 9, the heat supply pipe 14 being fixedly connected to the housing 2 through a pipe, and a hot nozzle 15 fixedly installed in a circular array at the bottom of the heat supply pipe 4. The pressurizing device 3 pressurizes the hot air generated by the heating device 4 and delivers it to the heat supply pipe 14 inside the chamber 2. The heat supply pipe 14 then delivers the high-pressure hot air to the rotating device 9 through the hot nozzle 15, thereby driving the rotating device 9 to rotate. At this time, the rotating device 9 will drive the bottom feeding device 11 to work, pulling the grain that has fallen from the top hopper 5 into the drying chamber 10 upwards. Then, the grain is dispersed from the top of the feeding device 11 to the surrounding areas and merges with the hot air delivered by the hot nozzle 15, thereby accelerating the evaporation of moisture in the grain and drying the grain evenly during the grain circulation process, thus improving the quality of the dried grain.

[0033] like Figure 5As shown, the feeding device 11 includes a feeding pipe 111, an auger 112, and a bulk material base 113. The feeding pipe 111 is fixedly installed inside the drying chamber 10 by a fixing ring 24. The auger 112 is movably installed at the center of the bottom of the drying chamber 10. The bulk material base 113 is fixedly installed on the top of the feeding pipe 111. The auger 112 pulls the grain at the bottom of the drying chamber 10 upward into the feeding pipe 111. Then, through the outlet at the top of the bulk material base 113, the grain spreads out and falls in all directions from the top of the bulk material base 113, causing the grain to rise from the bottom and then fall evenly. This cycle repeats continuously.

[0034] like Figure 4 and Figure 7 As shown, the rotating device 9 includes an impeller 901, a guide ring 902, and a sliding cover 903. The guide ring 902 is fixedly installed at the bottom of the impeller 901, and the sliding cover 903 is fixedly installed at the center of the top of the impeller 901. The center of the bottom of the impeller 901 is fixedly connected to the top of the auger 112. The hot airflow blown out by the hot nozzle 15 drives the impeller 901 to rotate, and then the guide ring 902 at the bottom is pulled to rotate synchronously by the impeller 901, which pulls the hot airflow entering the impeller 901 vertically downward. When the grain falls to the top of the sliding cover 903, it will slide to the side and enter the drying chamber 10 at the bottom.

[0035] like Figure 5 As shown, the air outlet of the heat nozzle 15 at the bottom of the heat pipe 14 blows towards the blades of the impeller 901. The heat nozzle 15 is inclined at the bottom of the heat pipe 14 and perpendicular to the blades of the impeller 901. By setting the heat nozzle 15 and the blades of the impeller 901 perpendicularly, the airflow blown out by the heat nozzle 15 drives the impeller 901 to rotate. The perpendicular setting of the two maximizes the force on the impeller 901, thereby improving the working efficiency.

[0036] like Figure 5As shown, a discharge hopper 501 is fixedly installed at the bottom of the hopper 5, and a hopper base 13 is fixedly installed in the middle of the discharge hopper 501. A baffle plate 17 is hinged to the inner wall of the discharge hopper 501. Springs 16 are fixedly connected to the four inner walls of the discharge hopper 501. The springs 16 are fixedly connected between the baffle plate 17 and the inner wall of the discharge hopper 501. A suction device 6 is fixedly installed on the side wall of the housing 2. The suction device 6 is fixedly connected to the housing 2 and the return base 19 through two return pipes 601 respectively. A return base 19 is provided in the middle of the hopper base 13. Return nozzles 20 are fixedly connected to all four sides of the return base 19. The air outlet of the return nozzles 20 faces the bottom end of the baffle plate 17. Spring 16 on the inner wall of hopper 501 elastically supports baffle 17, so that baffle 17 contacts the bottom of the side wall of hopper base 13 in the middle of hopper 501. This effectively prevents the grain from falling automatically. When the equipment is running, suction device 6 on the side of box 2 will draw excess hot air from inside box 2 into return base 19 inside hopper base 13 in the middle of hopper 501 through return pipe 601. Then, hot air is blown to the bottom of baffle 17 through return nozzles 20 around return base 19, so that baffle 17 is pushed outward and shakes continuously, so that the grain falls evenly and is dried once by the hot air flow blown out by return nozzles 20.

[0037] like Figure 10 As shown, a pair of sealing plates 21 are movably installed at the bottom of the drying chamber 10. A limiting ring 28 is fixedly connected to the bottom of the sealing plate 21. The outer end of a torsion spring 27 is fixedly connected to the inner side of the limiting ring 28. The inner end of the torsion spring 27 is fixedly connected to the bottom of the drying chamber 10. A pair of sweeping plates 22 are movably installed at the top of the sealing plate 21. The sweeping plates 22 are fixedly connected to the bottom of the auger 112. A handle 7 is fixedly connected to the outer side of the limiting ring 28. A limiting baffle 29 is fixedly connected to the side of the handle 7. A discharge pipe 25 is fixedly connected to the bottom of the drying chamber 10. A groove 26 is opened on the side wall of the discharge pipe 25. The limiting baffle 29 rotates and locks. The handle 7 is attached to the chute 26 and passes through the inner wall of the discharge pipe 25 and the box 2, and is movably engaged in the feeding device 11. The limit ring 28 is elastically supported by the torsion spring 27, which pulls the sealing plate 21 to block the outlet at the bottom of the drying chamber 10. The bottom sweeping plate 22 is continuously rotated by the auger 112 to turn the grain at the bottom of the drying chamber 10. When it is necessary to discharge the grain, the handle 7 is rotated to pull the sealing plate 21 to rotate, which opens the outlet at the bottom of the drying chamber 10. The rotation of the sweeping plate 22 pushes the grain on the surface of the sealing plate 21 towards the outlet, thereby discharging the grain into the discharge pipe 25.

[0038] like Figure 1 and Figure 6As shown, a viewing window 201 is fixedly installed on the front of the box 2. A feeding bin 12 is slidably installed in the inner cavity of the base 1 at the bottom of the box 2. A storage bin 23 is opened on the inner wall of the front of the base 1. A sliding door 8 is slidably installed inside the storage bin 23. The sliding door 8 is located in front of the feeding bin 12. During the grain drying process, the inside of the box 2 can be observed through the viewing window 201. After the grain is dried, the grain discharged from the top feeding pipe 25 can be received through the feeding bin 12 in the inner cavity of the base 1. Then, the sliding door 8 can be opened to remove the feeding bin 12 from the inside of the base 1.

[0039] Working principle and usage process of this invention:

[0040] Grain is fed into hopper 5, and the equipment is turned on. At this time, the heating device 4 generates heat, which is then pressurized by the pressurizing device 3 and delivered to the heat supply pipe 14 in the inner cavity of the housing 2. The heat is then delivered through the heat nozzle 15. Meanwhile, the suction device 6 on the side wall of the housing 2 extracts the residual heat from the housing 2 through the return pipe 601 and delivers it to the hopper base 13 in the discharge hopper 501 at the bottom of the hopper 5 through the return base 19 in the hopper base 13 and the return nozzle 20. Hot air is blown to the bottom of the baffle plate 17, which is hinged to the inner wall of the discharge hopper 501, causing the baffle plate 17 to shake and open outward, discharging the grain evenly from the hopper 5. The grain is then dried once by the hot air blown from the return nozzle 20 and falls into the drying chamber 10 at the bottom. At this time, the impeller 901 at the top of the drying chamber 10 rotates continuously under the blowing of the hot nozzle 15, which pulls the guide ring 902 at the bottom to rotate synchronously. The hot air blows vertically downward through the guide ring 902. During the feeding process, the auger 112 at the bottom of the impeller 901 rotates synchronously, continuously conveying the grain at the bottom of the drying chamber 10 upwards. Simultaneously, the sweeping plate 22 at the bottom of the auger 112 flips the grain at the bottom of the drying chamber 10, and then it enters the feeding pipe 111 and spreads outwards through the loose material base 113 at the top of the feeding pipe 111. During this process, the grain continuously interacts with the hot air blown out of the guide ring 902, thus performing secondary drying on the grain. This cycle is repeated to dry the grain. When the grain is dried, the handle 7 on the side of the box 2 can be rotated to pull the limiting ring 28 at the bottom of the drying chamber 10 to rotate. The limiting ring 28 opens the sealing plate 21, and the grain is discharged through the outlet at the bottom of the drying chamber 10. The sweeping plate 22 pushes the grain on the surface of the sealing plate 21 toward the outlet. After the grain is discharged, the handle 7 and the sealing plate 21 automatically reset under the action of the torsion spring 27, blocking the outlet at the bottom of the drying chamber 10 again.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving grain dryer with reusable waste heat, comprising a base (1), characterized in that: A pressurizing device (3) and a box (2) are fixedly installed at the top two ends of the base (1), respectively. A rotating groove (202) is opened on the back side of the box (2). A heating device (4) is fixedly connected to the top of the pressurizing device (3). A hopper (5) is fixedly installed on the top of the box (2). A drying chamber (10) is fixedly installed at the bottom of the inner cavity of the box (2). A feeding device (11) is fixedly installed on the top of the drying chamber (10). A rotating device (9) is movably installed on the top of the feeding device (11). A heat supply pipe (14) is provided on the top of the rotating device (9). The heat supply pipe (14) is fixedly connected to the box (2) through a pipe. A hot nozzle (15) is fixedly installed in a circular array at the bottom of the heat supply pipe (14). The feeding device (11) includes a feeding pipe (111), an auger (112), and a bulk material base (113). The feeding pipe (111) is fixedly installed inside the drying chamber (10) by a fixing ring (24). The auger (112) is movably installed at the center of the bottom of the drying chamber (10). The bulk material base (113) is fixedly installed on the top of the feeding pipe (111). The rotating device (9) includes an impeller (901), a guide ring (902), and a sliding cover (903). The guide ring (902) is fixedly installed at the bottom of the impeller (901), the sliding cover (903) is fixedly installed at the center of the top of the impeller (901), and the center of the bottom of the impeller (901) is fixedly connected to the top of the auger (112). A discharge hopper (501) is fixedly installed at the bottom of the hopper (5), a hopper base (13) is fixedly installed in the middle of the discharge hopper (501), a baffle plate (17) is hinged on the inner wall of the discharge hopper (501), and springs (16) are fixedly connected to the four inner walls of the inner cavity of the discharge hopper (501). The springs (16) are fixedly connected between the baffle plate (17) and the inner wall of the discharge hopper (501). A suction device (6) is fixedly installed on the side wall of the box (2). The suction device (6) is fixedly connected to the box (2) and the return base (19) through two return pipes (601). The hopper base (13) is provided with a return base (19) in the middle. The return base (19) is fixedly connected with return nozzles (20) around its perimeter. The air outlet of the return nozzles (20) faces the bottom of the baffle plate (17).

2. The energy-saving grain dryer with reusable waste heat according to claim 1, characterized in that: The air outlet of the heat nozzle (15) at the bottom of the heat pipe (14) blows towards the blades of the impeller (901). The heat nozzle (15) is inclined at the bottom of the heat pipe (14) and perpendicular to the blades of the impeller (901).

3. The energy-saving grain dryer with reusable waste heat according to claim 1, characterized in that: A pair of sealing plates (21) are movably installed at the bottom of the drying chamber (10). A limiting ring (28) is fixedly connected to the bottom of the sealing plate (21). The outer end of a torsion spring (27) is fixedly connected to the inner side of the limiting ring (28). The inner end of the torsion spring (27) is fixedly connected to the bottom of the drying chamber (10). A pair of sweeping plates (22) are movably installed at the top of the sealing plate (21). The sweeping plates (22) are fixedly connected to the bottom end of the auger (112).

4. The energy-saving grain dryer with reusable waste heat according to claim 3, characterized in that: A handle (7) is fixedly connected to the outer side of the limiting ring (28), and a limiting baffle (29) is fixedly connected to the side of the handle (7). A feeding pipe (25) is fixedly connected to the bottom of the drying chamber (10). A sliding groove (26) is provided on the side wall of the feeding pipe (25). The limiting baffle (29) is rotatably engaged in the sliding groove (26). The handle (7) passes through the feeding pipe (25) and the inner wall of the box (2) and is movably engaged in the feeding device (11).

5. The energy-saving grain dryer with reusable waste heat according to claim 1, characterized in that: A viewing window (201) is fixedly installed on the front of the box (2). A material feeding bin (12) is slidably installed in the inner cavity of the base (1) at the bottom of the box (2). A storage bin (23) is opened on the inner wall of the front of the base (1). A sliding door (8) is slidably installed inside the storage bin (23). The sliding door (8) is located on the front of the material feeding bin (12).

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