Batch type circulating grain dryer

Abstract

The utility model discloses a batch type circulating grain drying machine which comprises a box body, a feeding port is formed in the top of the box body, a discharging port is formed in the bottom of the box body, a conveying assembly is arranged in the box body and conveys grains from the feeding port to the discharging port, an air heater is arranged on the outer side of the box body, and the air heater is connected with the box body. The output end of the hot-air blower is connected with the air inlet hole of the box body through a connecting air pipe, and the input end of the hot-air blower is connected with the air outlet hole of the box body through an air inlet pipe; the air inlet pipe is arranged between the input end of the hot-air blower and the air outlet hole of the box body in a communicated mode, air with heat exhausted out of the box body can be guided to flow back into the hot-air blower, and the air with heat exhausted out of the box body is input into the box body after being subjected to secondary processing of the hot-air blower, so that the air with heat exhausted out of the box body is recycled. And the energy consumption of the drying equipment and the grain drying cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grain drying, in particular to a batch type circulating grain drying machine. Background Art

[0002] In order to ensure the safety of grain storage, improve processing quality and output rate, reduce grain losses, reduce respiration and microbial growth, improve storage and circulation conditions, and improve economic benefits, it is necessary to reduce the humidity of grain. With the progress of urbanization, traditional drying yards have disappeared. After the grain is harvested, farmers generally lay the grain on the road to dry it. However, this method has safety hazards. In addition, for large grain growers, even if they dry the grain on the road, they still cannot dry all the grain in a short time.

[0003] In order to avoid safety accidents caused by drying grain on the road and to reduce the humidity of large quantities of grain, equipment for grain drying has appeared on the market. For example, a batch grain circulation dryer disclosed in a Chinese patent with patent number CN211823731U has a blower fixedly connected to the left end, and the upper air outlet of the blower is fixedly connected to a hose. The upper end of the hose is fixedly connected to a cone sleeve, and the upper end of the cone sleeve extends into the transmission pipe. The end of the transmission pipe away from the hose passes through the upper wall of the drying box and extends into the interior thereof. The rear right end of the drying box is fixedly connected to an elevator, the bottom of the elevator is fixedly connected to a feed port, the upper end outlet of the elevator is connected to the side of the transmission pipe, the bottom of the drying box is connected to a disinfection box, and the end of the transmission pipe is connected to a grain diffusion mesh cover, the upper left end of the heating box is fixedly connected to an air guide fan, and the air inlet of the air guide fan is fixedly connected to a clean wind hood, a heating oil pipe is arranged in the heating box, the top of the heating box is connected to the air guide fan, and the right bottom of the heating box is connected to the drying box.

[0004] The grain drying equipment provided by the above patents, or other types of grain drying equipment, mostly force the input of hot air. The hot air is in direct contact with the grain. Under the action of heat conduction, the temperature of the grain is increased. When the surface temperature of the grain reaches the saturated steam temperature, the water begins to evaporate. The evaporated water vapor is carried away by the hot air and discharged from the drying equipment into the atmosphere, thereby achieving the drying of the grain. In general, the gas output from the grain drying equipment still has a relatively high temperature, and directly discharged into the atmosphere causes a waste of resources. At the same time, a large amount of energy is consumed by reheating other low-temperature gases through a hot air blower. Therefore, the energy consumption of the grain drying equipment is relatively high, which makes the grain drying cost more. If the discharged gas with a relatively high temperature is reused, the cost of grain drying will be reduced. Utility Model Content

[0005] The utility model aims to provide a batch-type circulating grain dryer, aiming to improve the problem that the relatively high-temperature gas discharged from the grain drying equipment cannot be utilized.

[0006] The utility model is implemented as follows: a batch circulation grain dryer comprises a box body, a feed port is arranged on the top of the box body, a discharge port is arranged on the bottom of the box body, a conveying assembly is arranged in the box body, the conveying assembly conveys grain from the feed port to the discharge port, a hot air blower is arranged on the outside of the box body, the output end of the hot air blower is connected to the air inlet of the box body through a connecting air duct, and the input end of the hot air blower is connected to the air outlet of the box body through an air inlet pipe.

[0007] Preferably, the air inlet is arranged on an end wall of the box body, the air outlet is arranged on the other end wall of the box body, and the air inlet and the air outlet are arranged at the bottom and the top of the box body respectively.

[0008] Preferably, a notch is provided on the air inlet pipe, a closing plate is detachably provided at the notch, a desiccant column is provided in the space formed by the closing plate and the air inlet pipe, the desiccant column comprises a mesh tube and a desiccant bag, and the desiccant bag is provided in the mesh tube.

[0009] Preferably, retaining rings are provided at both ends of the closing plate, and the retaining rings are located at both ends of the desiccant column and limit the position of the desiccant column.

[0010] Preferably, two annular plates are provided on the air inlet pipe, and the two annular plates are respectively arranged on both sides of the notch, and a threaded rod is threadedly provided on the annular plate, and the end of the threaded rod is provided on the air inlet pipe, and the annular plate can be controlled to cover the closing plate.

[0011] Preferably, the conveying assembly includes two motors, a plurality of first conveyor belts and a second conveyor belt. The plurality of first conveyor belts are arranged opposite to each other in an upper and lower distribution and are connected by belts. The plurality of second conveyor belts are also arranged opposite to each other in an upper and lower distribution and are connected by belts. The first conveyor belts and the second conveyor belts are staggered. The two motors control the first conveyor belts and the second conveyor belts to rotate in opposite directions.

[0012] Preferably, the lengths of the first conveyor belt and the second conveyor belt are both smaller than the length of the inner space of the box body, and the ends of the first conveyor belt and the second conveyor belt that are away from each other are respectively arranged adjacent to the two end walls of the box body; the feed port is located above the end of the uppermost first conveyor belt, and the discharge port is located below the end of the lowermost first conveyor belt.

[0013] Preferably, ventilation holes are provided on the first conveyor belt and the second conveyor belt, and filter screens can be provided on the outer sides of the first conveyor belt and the second conveyor belt.

[0014] Preferably, the connecting air duct is set as a first connecting air duct, or is set as a second connecting air duct, one first connecting air duct is set and connected to the bottom of the box, and multiple second connecting air ducts are set and are evenly distributed along the height direction of the box.

[0015] Preferably, bottom columns are provided at the end corners below the box body, lifting holes are provided on the bottom columns, and travel wheels are provided on the sides of the bottom columns. The two travel wheels are sleeved on the same lifting shaft through bearings, and the end of the lifting shaft is inserted into the lifting hole, and the diameter is smaller than the height of the lifting hole. A limiting column and an adjusting screw are threadedly provided on the lifting shaft, and the tops of the limiting column and the adjusting screw are connected to the box body.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model is provided with an air inlet pipe between the input end of the hot air blower and the air outlet of the box, which can guide the hot gas discharged from the box to flow back into the hot air blower, and then input into the box after secondary processing by the hot air blower, so as to realize the reuse of the hot gas discharged from the box, reduce the energy consumption of the drying equipment and the cost of drying grain.

[0018] 2. The utility model is provided with a desiccant column, which can dry the gas flowing back to the hot air blower through its operation to avoid high gas humidity and increase energy consumption, and a detachable closing plate is provided at the notch, which can be removed as needed to expose the desiccant column, providing convenience for removing and replacing the desiccant package as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the box body of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the air intake pipe of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the conveying assembly of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the first conveyor belt of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the second embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the bottom of the box body of the utility model.

[0026] In the figure: 1. box body; 11. feed port; 12. discharge port; 13. air outlet; 14. air inlet; 15. bottom column; 16. lifting hole; 2. hot air blower; 21. first connecting air duct; 22. second connecting air duct; 3. air inlet pipe; 31. notch; 32. annular plate; 33. threaded rod; 34. desiccant column; 35. retaining ring; 36. closing plate; 4. conveying assembly; 41. first conveyor belt; 42. second conveyor belt; 43. filter; 5. walking wheel; 51. adjusting screw; 52. limiting column; 53. lifting shaft. DETAILED DESCRIPTION

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0029] Example 1

[0030] As described in the background technology, the existing grain drying equipment directly discharges other gases with higher temperatures into the atmosphere, and then consumes energy to heat the incoming low-temperature gases, resulting in high grain drying costs. In order to reduce the cost of grain drying equipment, this embodiment provides a new drying equipment.

[0031] like Figure 1 , Figure 2As shown, the drying device includes a box body 1, a conveying assembly 4 and a hot air blower 2. The top of the box body 1 is provided with a feed inlet 11, the bottom is provided with a discharge port 12, and the two end walls of the box body 1 are respectively provided with an air inlet 14 and an air outlet 13. The air inlet 14 and the air outlet 13 are respectively provided at the bottom and the top of the box body 1. The hot air blower 2 is provided at the outer side of the end of the box body 1, and the output end is connected to the air inlet 14 of the box body 1 through a first connecting air duct 21, and the input end is connected to the air inlet 14 of the box body 1 through an air inlet pipe 3. The air outlet 13 is connected to the air outlet 13. Under the action of the hot air blower 2, the air in the atmosphere and the box 1 is sucked in, and the air is heated by the hot air blower 2. The heated air enters the box 1 through the air inlet 14, heats the grain, and is output from the air outlet 13, and flows into the hot air blower 2 along the air inlet pipe 3. The hot air blower 2 reheats the gas that still has heat and then inputs it into the box 1. Repeat the above steps, and the gas discharged from the box 1 and has heat can be reused to reduce the energy consumption of the drying equipment. In actual use, it can be decided whether to block the air inlet end of the hot air blower 2 that deviates from the air inlet pipe 3 according to actual needs. The conveying component 4 is arranged on the inner side of the box 1, and the two ends are respectively opposite to the feed port 11 and the discharge port 12. Therefore, when the grain is put into the box 1 through the feed port 11, it falls directly on the conveying component 4. Under the action of the conveying component 4, the grain is transferred and moved along the S-shaped route of the conveying component 4 for many times, and directly moves to the discharge port 12, and is output from the discharge port 12.

[0032] like Figure 3 As shown, after the hot air heats the grain, the steam will be mixed in the gas and discharged, so the gas that flows back into the hot air blower 2 needs to be dried. In order to achieve this purpose, a desiccant column 34 is arranged in the air inlet pipe 3. The desiccant column 34 includes a mesh tube and a desiccant bag. The desiccant bag is arranged in the mesh tube, and the diameter of the mesh tube is equal to the inner diameter of the air inlet pipe 3. The gas discharged from the box 1 reduces its own humidity under the action of the desiccant bag, thereby reducing the energy consumption of heating the gas.

[0033] like Figure 3 As shown, in order to be able to disassemble and replace the desiccant pack according to needs, a notch 31 is provided on the air intake pipe 3, and two annular plates 32 are provided on the air intake pipe 3. The two annular plates 32 are respectively provided on both sides of the notch 31. A threaded rod 33 is threadedly provided on the annular plate 32, and the end of the threaded rod 33 is provided on the air intake pipe 3. A closing plate 36 is provided at the notch 31, and retaining rings 35 are provided at both ends of the closing plate 36. The retaining rings 35 are located at both ends of the desiccant column 34 and limit the position of the desiccant column 34. In addition, the annular plate 32 covers the end of the closing plate 36. When the desiccant pack needs to be replaced, the threaded rod 33 is rotated to control the movement of the annular plate 32 and to separate from the closing plate 36. After the restriction of the closing plate 36 is released, the closing plate 36 can be separated from the air intake pipe 3, so that the desiccant column 34 is exposed, and the desiccant column 34 can be taken out to replace the desiccant pack.

[0034] like Figure 2 , Figure 4 As shown, in order to achieve the drying process of grain, the conveying assembly 4 includes two motors, a plurality of first conveyor belts 41 and a second conveyor belt 42, air holes are arranged on the first conveyor belts 41 and the second conveyor belts 42, a plurality of first conveyor belts 41 are arranged opposite to each other in an upper and lower distribution, and are connected by belts, a plurality of second conveyor belts 42 are also arranged opposite to each other in an upper and lower distribution, and are connected by belts, the first conveyor belts 41 and the second conveyor belts 42 are staggered and alternately arranged, the lengths of the first conveyor belts 41 and the second conveyor belts 42 are both less than the length of the inner space of the box body 1, and the ends of the first conveyor belts 41 and the second conveyor belts 42 that are away from each other are respectively arranged adjacent to the two end walls of the box body 1. The feed port 11 is located above the end of the uppermost first conveyor belt 41, and the discharge port 12 is located below the end of the lowermost first conveyor belt 41. Both motors are arranged on the outside of the box body 1, and control the first conveyor belt 41 and the second conveyor belt 42 to rotate in opposite directions. Since the first conveyor belt 41 and the second conveyor belt 42 are staggered and alternately distributed, the grain transported by the upper conveyor belt just falls into the end of the lower conveyor belt. Since the upper and lower conveyor belts rotate in opposite directions, the grain is driven to move in opposite directions. From entering to exiting the box body 1, the grain needs to turn and move several times, thereby extending the time for the grain to move in the box body 1, which facilitates the full drying of the grain. Since the conveyor belt is provided with air holes, hot air can pass through the conveyor belt and flow into the grain.

[0035] like Figure 5 As shown, if the diameter of the air holes is larger than the grain size, a filter 43 with a smaller aperture may be covered on the outer side of the first conveyor belt 41 and the second conveyor belt 42 .

[0036] Example 2

[0037] like Figure 6 As shown, on the basis of Example 1, if it is desired to allow the hot air to flow faster into the vicinity of the upper conveyor belt, a plurality of air inlet holes 14 distributed vertically may be provided on the end wall of the box body 1, and a second connecting air duct 22 is provided at each air inlet hole 14, and a plurality of second connecting air ducts 22 are connected to the output end of the hot air blower 2, that is, the second connecting air duct 22 replaces the first connecting air duct 21.

[0038] Example 3

[0039] like Figure 7As shown, on the basis of Embodiment 1 or 2, in order to be able to adjust the position of the device according to demand, a bottom column 15 is provided at the end corner below the box body 1, a lifting hole 16 is provided on the bottom column 15, and a running wheel 5 is provided on the side of the bottom column 15. The two running wheels 5 are sleeved on the same lifting shaft 53 through a bearing connection, and the end of the lifting shaft 53 is inserted into the lifting hole 16, and the diameter is smaller than the height of the lifting hole 16. A limiting column 52 and an adjusting screw 51 are provided through the lifting shaft 53, and the limiting column 52 and the adjusting screw 51 are both connected to the box body 1. By rotating the adjusting screw 51, the lifting shaft 53 can be controlled to descend until the running wheel 5 contacts the ground and the bottom column 15 is off the ground, which can drive the device to move.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A batch cycle grain dryer, characterized in that: The invention comprises a box body (1), wherein a feed port (11) is arranged at the top of the box body (1), and a discharge port (12) is arranged at the bottom; a conveying assembly (4) is arranged in the box body (1), and the conveying assembly (4) conveys grain from the feed port (11) to the discharge port (12); a hot air blower (2) is arranged on the outside of the box body (1); the output end of the hot air blower (2) is connected to an air inlet (14) of the box body (1) through a connecting air duct; and the input end of the hot air blower (2) is connected to an air outlet (13) of the box body (1) through an air inlet pipe (3).

2. A batch cycle grain dryer according to claim 1, characterized in that: The air inlet (14) is arranged on an end wall of the box body (1), the air outlet (13) is arranged on the other end wall of the box body (1), and the air inlet (14) and the air outlet (13) are arranged at the bottom and the top of the box body (1), respectively.

3. A batch cycle grain dryer according to claim 2, characterized in that: The air inlet pipe (3) is provided with a notch (31), a closing plate (36) is detachably provided at the notch (31), a desiccant column (34) is provided in the space formed by the closing plate (36) and the air inlet pipe (3), the desiccant column (34) comprises a mesh cylinder and a desiccant bag, and the desiccant bag is provided in the mesh cylinder.

4. A batch cycle grain dryer according to claim 3, characterized in that: Both ends of the closing plate (36) are provided with retaining rings (35), and the retaining rings (35) are located at both ends of the desiccant column (34) and limit the position of the desiccant column (34).

5. A batch cycle grain dryer according to claim 4, characterized in that: Two annular plates (32) are arranged on the air intake pipe (3), and the two annular plates (32) are respectively arranged on both sides of the notch (31). A threaded rod (33) is threadedly penetrated on the annular plate (32), and the end of the threaded rod (33) is penetrated on the air intake pipe (3), and the annular plate (32) can be controlled to cover the closing plate (36).

6. The batch cycle grain dryer according to claim 1, characterized in that: The conveying assembly (4) comprises two motors, a plurality of first conveying belts (41) and a second conveying belt (42); the plurality of first conveying belts (41) are arranged opposite to each other in an upper and lower distribution and are connected by belts; the plurality of second conveying belts (42) are also arranged opposite to each other in an upper and lower distribution and are connected by belts; the first conveying belts (41) and the second conveying belts (42) are staggered and alternately arranged; and the two motors control the first conveying belts (41) and the second conveying belts (42) to rotate in opposite directions.

7. A batch cycle grain dryer according to claim 6, characterized in that: The lengths of the first conveyor belt (41) and the second conveyor belt (42) are both shorter than the length of the inner space of the box body (1); the ends of the first conveyor belt (41) and the second conveyor belt (42) that are away from each other are respectively arranged adjacent to the two end walls of the box body (1); the feed port (11) is located above the end of the uppermost first conveyor belt (41), and the discharge port (12) is located below the end of the lowermost first conveyor belt (41).

8. The batch cycle grain dryer according to claim 6, characterized in that: The first conveyor belt (41) and the second conveyor belt (42) are provided with air holes, and the outer side surfaces of the first conveyor belt (41) and the second conveyor belt (42) can be covered with a filter screen (43).

9. The batch cycle grain dryer according to claim 1, characterized in that: The connecting air duct is configured as a first connecting air duct (21) or as a second connecting air duct (22); one first connecting air duct (21) is provided and is connected to the bottom of the box body (1); a plurality of second connecting air ducts (22) are provided and are evenly distributed along the height direction of the box body (1).

10. The batch cycle grain dryer according to claim 1, characterized in that: A bottom column (15) is provided at the end corner below the box body (1), a lifting hole (16) is provided on the bottom column (15), a running wheel (5) is provided on the side of the bottom column (15), two running wheels (5) are sleeved on the same lifting shaft (53) through a bearing connection, the end of the lifting shaft (53) is inserted into the lifting hole (16), and the diameter is smaller than the height of the lifting hole (16), a limiting column (52) and an adjusting screw (51) are provided through the lifting shaft (53), and the tops of the limiting column (52) and the adjusting screw (51) are connected to the box body (1).

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