A multi-stage drying device for agricultural product production

Abstract

This utility model relates to the field of agricultural product production technology and discloses a multi-stage drying device for agricultural product production, including a drying box. An air outlet pipe is fixedly installed on the outer wall of the drying box, and a preheating box is fixedly installed at one end of the air outlet pipe. A heat exchange tube one and a heat exchange tube two are fixedly installed inside the preheating box. The upper end of the heat exchange tube one is connected to the bottom end of the heat exchange tube two. The bottom end of the heat exchange tube one extends to the outer wall of the preheating box, and the upper end of the heat exchange tube two extends to the upper outer wall of the preheating box. The technical effect is that it can effectively recover the heat that would otherwise be directly emitted and wasted, and use it to preheat the fresh air entering the device, which greatly reduces the additional energy consumption during the operation of the device, lowers energy costs, improves energy utilization efficiency, and shortens the drying time of agricultural products.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product production technology, specifically a multi-stage drying device for agricultural product production. Background Technology

[0002] In the field of agricultural product processing, drying is a crucial step. For harvested agricultural products, such as grains, vegetables, and fruits, timely drying can effectively prevent mold and rot, ensuring the quality of the products and extending their shelf life.

[0003] Many drying devices directly release large amounts of hot air into the environment after drying agricultural products. This wastes a lot of energy and increases the overall cost of drying operations. Meanwhile, the drying equipment needs to continuously circulate fresh air to ensure the drying effect. However, this fresh air is usually at ambient temperature when it enters the drying equipment. In typical agricultural production environments, the outside air temperature is low in winter and relatively high in summer, but still not high enough to meet the drying requirements. The direct entry of unheated fresh air into the drying equipment requires a large amount of energy to heat it to the appropriate drying temperature, which undoubtedly further exacerbates energy consumption.

[0004] Therefore, we propose a novel multi-stage drying device for agricultural product production. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage drying device for agricultural production, which solves the problem that many drying devices directly discharge a large amount of high-temperature hot air into the external environment after drying agricultural products. Such high-temperature hot air is wasted, which not only causes great energy loss, but also increases the overall cost of drying operations. Fresh air that has not been preheated enters the drying device directly, which requires a lot of energy to heat it to a suitable drying temperature, which undoubtedly further aggravates the problem of energy consumption.

[0006] This utility model provides the following technical solution: a multi-stage drying device for agricultural product production, including a drying box, an air outlet pipe fixedly installed on the outer wall of the drying box, a preheating box fixedly installed at one end of the air outlet pipe, a heat exchange tube one and a heat exchange tube two fixedly installed inside the preheating box, the upper end of the heat exchange tube one being connected to the bottom end of the heat exchange tube two, the bottom end of the heat exchange tube one extending to the outer wall of the preheating box, the upper end of the heat exchange tube two extending to the upper outer wall of the preheating box, a connecting pipe fixedly connected to the bottom end of the heat exchange tube two, one end of the connecting pipe extending to the inner end of the drying box, and an electric hot air blower provided on the connecting pipe;

[0007] The drying chamber has a multi-stage drying structure inside.

[0008] Preferably, the multi-stage drying structure includes a conveyor motor, which is mounted on the bottom of the drying chamber via a motor plate. The output end of the conveyor motor extends into the interior of the drying chamber. A rotating rod is fixedly installed on the output end of the conveyor motor. The upper end of the rotating rod is rotatably connected to the upper interior of the drying chamber. Multiple spiral blades are fixedly installed on the outer surface of the rotating rod, and the multiple spiral blades are arranged in a mesh pattern.

[0009] Preferably, a feed hopper is fixedly installed on the bottom outer wall of the drying box, and a discharge port with a through-hole is opened at the top of the drying box.

[0010] Preferably, both heat exchange tube one and heat exchange tube two are arranged in a curved shape.

[0011] Preferably, a filter screen is fixedly installed at the upper end of the heat exchange tube 2.

[0012] Preferably, a filter screen is fixedly installed at the inlet end of the air outlet duct.

[0013] Preferably, the bottom of the drying box and the bottom of the preheating box are both fixedly connected to a support frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention innovatively utilizes a structure that preheats fresh air by removing hot air from the drying process. This effectively recovers heat that would otherwise be wasted by direct emissions and uses it to preheat the fresh air entering the device. This recycling of thermal energy significantly reduces the additional energy consumption during operation, lowers energy costs, improves energy efficiency, and shortens the drying time of agricultural products. Consequently, it increases the overall production efficiency of the drying process, reduces the emission of greenhouse gases and other pollutants, meets the environmental protection requirements of energy conservation and emission reduction, helps alleviate environmental pressure, and achieves green and sustainable development in agricultural production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side sectional view of the present invention.

[0018] Figure 3 This is a frontal sectional view of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0020] In the diagram: 1. Drying box; 2. Preheating box; 3. Heat exchanger tube 1; 4. Air outlet pipe; 5. Electric hot air blower; 6. Connecting pipe; 7. Heat exchanger tube 2; 8. Rotating rod; 9. Spiral blade; 10. Conveyor motor; 11. Feed hopper; 12. Discharge port; 13. Filter screen 1; 14. Support frame; 15. Filter screen 2.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, this utility model provides a technical solution: a multi-stage drying device for agricultural product production, including a drying box 1, an air outlet pipe 4 fixedly installed on the outer wall of the drying box 1, a preheating box 2 fixedly installed at one end of the air outlet pipe 4, a heat exchange tube 1 3 and a heat exchange tube 2 7 fixedly installed inside the preheating box 2, the upper end of the heat exchange tube 1 3 being connected to the bottom end of the heat exchange tube 2 7, the bottom end of the heat exchange tube 1 3 extending to the outer wall of the preheating box 2, the upper end of the heat exchange tube 2 7 extending to the upper outer wall of the preheating box 2, a connecting pipe 6 fixedly connected to the bottom end of the heat exchange tube 2 7, one end of the connecting pipe 6 extending to the inner end of the drying box 1, and an electric hot air blower 5 provided on the connecting pipe 6;

[0024] The drying oven 1 has a multi-stage drying structure inside.

[0025] In an optional embodiment: the multi-stage drying structure includes a conveyor motor 10, which is mounted on the bottom of the drying chamber 1 via a motor plate. The output end of the conveyor motor 10 extends into the interior of the drying chamber 1. A rotating rod 8 is fixedly installed on the output end of the conveyor motor 10. The upper end of the rotating rod 8 is rotatably connected to the upper interior of the drying chamber 1. Multiple spiral blades 9 are fixedly installed on the outer surface of the rotating rod 8, and the multiple spiral blades 9 are arranged in a mesh pattern.

[0026] It should be noted that the output of the conveyor motor 10 rotates the rotating rod 8, which in turn causes the spiral blades 9 mounted on it to rotate, thereby transporting the agricultural products upwards.

[0027] In one optional embodiment: a feed hopper 11 is fixedly installed on the outer wall of the bottom end of the drying box 1, and a discharge port 12 is opened at the upper end of the drying box 1 in a through manner, so that agricultural products are discharged from the bottom end to the top.

[0028] In an optional embodiment, both heat exchange tube 3 and heat exchange tube 7 are arranged in a curved shape. The curved shape of heat exchange tube 3 and heat exchange tube 7 can increase the travel path of gas in the preheating box 2, improve the heat exchange efficiency, and maximize the preheating effect.

[0029] In an optional embodiment, a filter screen 15 is fixedly installed at the upper end of the heat exchange tube 2 7 to filter impurities contained in the low-temperature air entering the heat exchange tube 2 7, so as to prevent impurities from entering and contaminating the agricultural products being dried.

[0030] In an optional embodiment, a filter screen 13 is fixedly installed at the inlet end of the air outlet duct 4 to prevent agricultural products transported by the spiral blades 9 from being sucked into the air outlet duct 4.

[0031] In an optional embodiment, a support frame 14 is fixedly connected to the bottom of both the drying chamber 1 and the preheating chamber 2, so that the drying chamber 1 and the preheating chamber 2 are away from the ground, which facilitates the deployment of the work.

[0032] In practical use, the working principle of this utility model is as follows:

[0033] Agricultural products are placed into the drying chamber 1 through the feed hopper 11. Simultaneously, the conveyor motor 10 is started, rotating the rotating rod 8, which in turn rotates the spiral blades 9 mounted on top, thus transporting the agricultural products upwards. The spiral blades 9 are arranged in a mesh pattern to ensure even distribution of the agricultural products during transport, preventing accumulation and compaction, and facilitating full contact and heat transfer between hot air and the agricultural products. At the same time, the electric hot air fan 5 is started, drawing in fresh outside air, turning it into hot air, and then delivering it to the bottom of the drying chamber 1. The high temperature of the newly entered hot air promotes rapid dehydration of the outer surface of the agricultural products. Both the hot air and the agricultural products gradually rise together. As the hot air rises, its temperature gradually decreases, causing the agricultural products previously located at the bottom to move upwards. This prevents quality degradation caused by localized overheating or insufficient drying, such as discoloration, deformation, and loss of nutrients, thus ensuring the final quality of the agricultural products. The hot air that rises to the top then enters the air outlet duct 4 and then the heat exchange tube 3. Liquid for heat exchange is injected into the preheating box 2. The hot air in the heat exchange tube 3 exchanges heat with the liquid in the preheating box 2, and then the heat from the liquid is transferred to the heat exchange tube 7, preheating the low-temperature air passing through the heat exchange tube 7. This achieves the purpose of recovering heat that would otherwise be wasted by direct emission and using it to preheat the fresh air entering the device.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-stage drying device for agricultural product production, comprising a drying chamber (1), characterized in that: An air outlet pipe (4) is fixedly installed on the outer wall of the drying oven (1). A preheating box (2) is fixedly installed at one end of the air outlet pipe (4). A heat exchange tube (3) and a heat exchange tube (7) are fixedly installed inside the preheating box (2). The upper end of the heat exchange tube (3) is connected to the bottom end of the heat exchange tube (7). The bottom end of the heat exchange tube (3) extends to the outer wall of the preheating box (2). The upper end of the heat exchange tube (7) extends to the upper outer wall of the preheating box (2). A connecting pipe (6) is fixedly connected to the bottom end of the heat exchange tube (7). One end of the connecting pipe (6) extends to the inner end of the drying oven (1). An electric hot air blower (5) is provided on the connecting pipe (6). The drying oven (1) has a multi-stage drying structure inside.

2. The multi-stage drying device for agricultural product production according to claim 1, characterized in that: The multi-stage drying structure includes a conveyor motor (10), which is mounted on the bottom of the drying box (1) via a motor plate. The output end of the conveyor motor (10) extends into the interior of the drying box (1). A rotating rod (8) is fixedly installed on the output end of the conveyor motor (10). The upper end of the rotating rod (8) is rotatably connected to the upper interior of the drying box (1). Multiple spiral blades (9) are fixedly installed on the outer surface of the rotating rod (8), and the multiple spiral blades (9) are arranged in a mesh pattern.

3. The multi-stage drying device for agricultural product production according to claim 1, characterized in that: A feed hopper (11) is fixedly installed on the outer wall of the bottom end of the drying box (1), and a discharge port (12) is provided at the upper end of the drying box (1) in a through-hole configuration.

4. The multi-stage drying device for agricultural product production according to claim 1, characterized in that: Both the first heat exchange tube (3) and the second heat exchange tube (7) are arranged in a curved shape.

5. A multi-stage drying device for agricultural product production according to claim 1, characterized in that: A filter screen (15) is fixedly installed at the upper end of the heat exchange tube (7).

6. A multi-stage drying device for agricultural product production according to claim 1, characterized in that: A filter screen (13) is fixedly installed at the inlet end of the air outlet pipe (4).

7. A multi-stage drying device for agricultural product production according to claim 1, characterized in that: The bottom of the drying box (1) and the bottom of the preheating box (2) are both fixedly connected to a support frame (14).

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