Far infrared hot air combined grain dryer
By using a far-infrared hot air combined dryer, which combines hot air and far-infrared rays for drying, the problems of low energy consumption and low efficiency in existing grain dryers have been solved. This method achieves high efficiency by improving drying efficiency and reducing energy consumption.
Patent Information
- Application Number
- CN202423314634.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing grain dryers consume a lot of energy, have low drying efficiency, and have low efficiency in the migration of moisture from the surface to the interior when drying grains.
The far-infrared hot air combined dryer uses a combination of hot air and far-infrared rays to dry the material. Hot air heats the surface of the material, while far-infrared rays heat it from the inside, thus improving drying efficiency.
It improves drying efficiency, reduces the number of grain cycles, improves drying quality, and reduces energy consumption.
Smart Images
Figure CN223663688U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dryer technology, and in particular to a far-infrared hot air combined grain dryer. Background Technology
[0002] Dryers are one of the commonly used equipment for drying grains. Generally, drying technologies are classified according to pressure into atmospheric pressure drying and vacuum drying; according to operation mode into intermittent drying and continuous drying; and according to the different ways of heat energy transfer to wet materials into convection drying, conduction drying and radiation drying.
[0003] Existing grain dryers generally rely on single hot air convection drying, using a single burner or hot air furnace, which consumes a lot of energy and has insufficient heat exchange efficiency. On the other hand, existing dryers use convection heat exchange to dry grains, where the grain moisture first dries from the surface and then migrates from the inside to the outside. However, the inside of the grain needs to be heated first, so the grain drying efficiency is low when using pure convection drying.
[0004] Therefore, it is necessary to propose a far-infrared hot air combined grain dryer to solve or at least alleviate the above-mentioned defects. Utility Model Content
[0005] The main objective of this invention is to provide a far-infrared hot air combined grain dryer to solve the problems of high energy consumption and low drying efficiency in existing grain dryers.
[0006] To achieve the above objectives, this utility model provides a far-infrared hot air combined grain dryer, comprising a machine body and a feeding mechanism, a discharging mechanism, a drying chamber, and a far-infrared emitting device, all connected to the machine body; wherein,
[0007] The machine body includes a tempering section and a drying section, and the discharge end of the spreading mechanism is built into the top of the tempering section;
[0008] The discharge mechanism includes a grain flow channel, the grain flow channel, the drying chamber, and the far-infrared emitting device are all located in the drying section. The grain flow channel is formed on the outside of the drying chamber, an air inlet is provided inside the drying chamber, and the far-infrared emitting device is located inside the drying chamber.
[0009] The bottom end of the grain flow channel has a discharge port, and the side wall of the grain flow channel and the machine body together form an exhaust chamber. Ventilation holes are provided on the side walls of both the grain flow channel and the drying chamber, and an air outlet communicating with the exhaust chamber is provided on the machine body.
[0010] Preferably, the sidewall at the bottom of the grain flow channel is inclined downward toward the discharge port.
[0011] Preferably, the discharge mechanism further includes a discharge wheel, which is connected to the machine body and is rotatably mounted thereon, and is located at the high end of the inclined sidewall at the bottom of the grain flow channel.
[0012] Preferably, the discharge wheel divides the grain flow channel into a hot air drying channel and a far-infrared drying channel, and the far-infrared emitting device is positioned close to the far-infrared drying channel.
[0013] Preferably, the width of the far-infrared drying channel is smaller than the width of the hot air drying channel.
[0014] Preferably, the material spreading mechanism includes a hopper, an elevator, and an upper conveying assembly. The hopper is connected to the bottom outer side of the machine body, the bottom end of the elevator is connected to the hopper, the top end of the elevator is connected to the upper conveying assembly, the upper conveying assembly is connected to the top end of the machine body, and the discharge end of the upper conveying assembly extends into the top of the tempering section.
[0015] Preferably, the system further includes an exhaust fan, which is connected to the outside of the machine body and is connected to the air outlet of the exhaust chamber.
[0016] Preferably, the device further includes a partition with a triangular cross-section. The partition is connected to the bottom of the drying chamber, and the bottom end of the partition is spaced apart from the side wall of the grain flow channel.
[0017] Preferably, the inclination angle of the sidewall at the bottom of the grain flow channel is 45° to 60°.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] This utility model provides a far-infrared hot air combined grain dryer, including a machine body and a feeding mechanism, a discharge mechanism, a drying chamber, and a far-infrared emitting device all connected to the machine body. The machine body includes a tempering section and a drying section. The discharge end of the feeding mechanism is built into the top of the tempering section. The discharge mechanism includes a grain flow channel. The grain flow channel, the drying chamber, and the far-infrared emitting device are all located in the drying section. The grain flow channel is formed on the outside of the drying chamber. The drying chamber has an air inlet, and the far-infrared emitting device is located in the drying chamber. The bottom end of the grain flow channel has a discharge port. The side wall of the grain flow channel and the machine body enclose an exhaust chamber. Ventilation holes are provided on the side walls of the grain flow channel and the drying chamber. An air outlet communicating with the exhaust chamber is provided on the machine body. This combined hot air and far-infrared drying method heats the surface of the grain as it passes through the upper part of the grain flow channel, removing surface moisture, while the lower part of the grain flow channel is heated from the inside by far-infrared irradiation, accelerating the migration of moisture from the inside of the grain to the outside, improving drying efficiency, reducing the number of grain cycles, improving the quality of dried grain, and reducing drying energy consumption. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 This is a schematic internal cross-sectional view of the overall structure in one embodiment of the present invention;
[0022] Figure 2 This is a schematic diagram of the external side of the overall structure in one embodiment of the present invention;
[0023] Figure 3 This is a schematic diagram of the internal hot air and far-infrared radiation flow in an application scenario according to one embodiment of the present invention.
[0024] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0025] Explanation of icon numbers:
[0026] 110. Drying chamber; 120. Far-infrared emitting device; 130. Exhaust fan; 20. Discharge mechanism; 210. Grain flow channel; 211. Hot air drying channel; 212. Far-infrared drying channel; 213. Discharge port; 214. Exhaust chamber; 220. Discharge wheel; 230. Partition; 30. Spreading mechanism; 310. Hopper; 320. Elevator; 330. Upper conveyor assembly; 40. Machine body; 410. Tempering section; 420. Drying section. Detailed Implementation
[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0028] 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.
[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0031] Please see the appendix Figure 1-3This utility model provides an embodiment of a far-infrared hot air combined grain dryer, comprising a body 40 and a feeding mechanism 30, a discharging mechanism 20, a drying chamber 110, and a far-infrared emitting device 120, all connected to the body 40. First, it should be noted that, unlike existing grain dryers which generally rely on single hot air convection drying and employ a single burner or hot air furnace, resulting in high energy consumption and insufficient heat exchange efficiency; furthermore, existing dryers use convection heat exchange to dry grains, where moisture first dries from the surface and then migrates from the inside out. However, this requires heating the grain's interior first, leading to low drying efficiency in pure convection drying. This application addresses these shortcomings of the prior art by providing a far-infrared hot air combined grain dryer, as detailed below:
[0032] The machine body 40 includes a tempering section 410 and a drying section 420. The discharge end of the spreading mechanism 30 is built into the top of the tempering section 410. The discharge mechanism 20 includes a grain flow channel 210. The grain flow channel 210, the drying chamber 110, and the far-infrared emitting device 120 are all disposed in the drying section 420. The grain flow channel 210 is formed on the outside of the drying chamber 110. The drying chamber 110 has an air inlet, and the far-infrared emitting device 120 is disposed in the drying chamber 110. The bottom end of the grain flow channel 210 has a discharge port 213. The side wall of the grain flow channel 210 and the machine body 40 enclose an exhaust chamber 214. Ventilation holes are provided on both the grain flow channel 210 and the side wall of the drying chamber 110. An air outlet communicating with the exhaust chamber 214 is provided on the machine body 40.
[0033] Specifically, the far-infrared hot air combined grain dryer of this application includes a body 40, a feeding mechanism 30, a discharging mechanism 20, a drying chamber 110, and a far-infrared emitting device 120. The body 40 forms a closed chamber for drying and also houses the feeding mechanism 30, the discharging mechanism 20, the drying chamber 110, and the far-infrared emitting device 120. It includes a tempering section 410 and a drying section 420. The tempering section 410 is used to reduce the internal thermal stress impact caused during the drying process and prevent the grain surface from shrinking and hardening. Browning can affect the quality of dried products, and the drying section 420 is used to dry grains; the spreading mechanism 30 is used to spread grains downwards, so its discharge end is built into the top of the tempering section 410, so that the grains pass through the tempering section 410 before entering the drying section 420; the discharge mechanism 20 is used to cooperate with the drying chamber 110 and the far-infrared emitting device 120 for drying, and at the same time transports and discharges the material to the next stage during the drying process. It is worth mentioning that multiple drying mechanisms 10 can be arranged side by side to increase the drying effect.
[0034] The discharge mechanism 20 includes a grain flow channel 210, which receives grain falling from the tempering section 410 for drying. It is formed on the outside of the drying chamber 110 and can be formed by a flow-through plate enclosing the grain flow channel 210 with the side wall of the drying chamber 110. Therefore, the grain flow channel 210, the drying chamber 110, and the far-infrared emitting device 120 are all located in the drying section 420. The drying chamber 110 serves as a heat source, including hot air and far-infrared rays. Therefore, the interior of the drying chamber 110 is used to introduce hot air, requiring an opening between the drying chamber 110 and the external heat source. The air inlet is connected to the heat source, and the external heat source can be a hot air furnace, an oil furnace, etc. At the same time, the far-infrared emitting device 120 is set in the drying chamber 110 to cooperate with the hot air for drying. Far-infrared rays are rays in a band of infrared radiation and belong to a type of electromagnetic wave. Far-infrared drying utilizes radiative heat transfer. Far-infrared rays travel in a straight line at the speed of light to reach the material being dried. When the emission frequency of far-infrared rays matches the natural frequency of molecular motion in the material being dried, it causes strong vibration of the molecules in the material, generating heat through intense friction inside the material to achieve the purpose of drying. Far-infrared heat is highly concentrated and has strong penetrating power, so as to heat the material being dried from the inside.
[0035] It is worth mentioning that the bottom end of the grain flow channel 210 is the discharge port 213. After the grain falls through the tempering section 410, it enters the grain flow channel 210 and is dried by the central drying mechanism 10 while being transported towards the discharge port 213. The outer side of the grain flow channel 210 and the machine body 40 together form an exhaust chamber 214. The exhaust chamber 214 is used to discharge the hot air generated after the drying effect, forming an air circulation system. Therefore, both the grain flow channel 210 and the side wall of the drying chamber 110 need to be... Ventilation holes are provided to ensure that the hot air flowing out of the drying chamber 110 first dries the grain in the grain flow channel 210, then flows out through the ventilation holes of the grain flow channel 210 into the exhaust chamber 214, and is then discharged from the air outlet in the exhaust chamber 214. In a preferred embodiment of this application, an exhaust fan 130 is installed on the outer wall of the machine body 40. The exhaust fan 130 is connected to the air outlet of the exhaust chamber 214. The exhaust fan 130 can accelerate the discharge of moisture generated after drying to maintain a long-term dry environment inside.
[0036] In a preferred embodiment of the present invention, the sidewall at the bottom of the grain flow channel 210 is inclined downward toward the discharge port 213.
[0037] It should be noted that this arrangement facilitates the flow of grains to the bottom of the grain flow channel 210 and their convergence towards the discharge port 213. The inclined design also helps the grains fall more easily and prevents them from accumulating. Preferably, the inclination angle can be set to 45°–60°, which can be adjusted as needed by those skilled in the art.
[0038] In a preferred embodiment of the present invention, the discharge mechanism 20 further includes a discharge wheel 220, which is connected to the machine body 40 and is rotatably mounted thereon. The discharge wheel 220 is located at the high end of the inclined side wall at the bottom of the grain flow channel 210.
[0039] It should be noted that the discharge wheel 220 can adjust the discharge speed to avoid material accumulation due to excessively fast discharge or disruption of production processes due to excessively slow discharge. The discharge wheel 220 is located at the high end of the inclined sidewall at the bottom of the grain flow channel 210, thus dividing the grain flow channel 210 into a hot air drying channel 211 and a far-infrared drying channel 212. The hot air drying channel 211 is located above the discharge wheel 220 for initial drying primarily using hot air; while the far-infrared drying channel 212 is located below the discharge wheel 220 for drying primarily using far-infrared rays. Therefore, when the far-infrared emitting device 120 is installed in the drying chamber 110, it must be positioned close to the far-infrared drying channel 212 to emit far-infrared waves for internal drying. Please refer to the appendix for details. Figure 3 A schematic diagram showing the flow direction of medium-heated air and far-infrared rays.
[0040] In a preferred embodiment of this utility model, the width of the far-infrared drying channel 212 is smaller than the width of the hot air drying channel 211.
[0041] It is worth noting that reducing the width of the far-infrared drying channel 212 in this way can, firstly, slow down the discharge rate, thereby reducing the amount of grain accumulation, and secondly, ensure that the far-infrared drying effect is more complete, so as not to cause the grain in the middle part to have poor drying effect due to too much grain.
[0042] Furthermore, the material spreading mechanism 30 includes a hopper 310, an elevator 320, and an upper conveying assembly 330. The hopper 310 is connected to the bottom outer side of the machine body 40. The bottom end of the elevator 320 is connected to the hopper 310, and the top end of the elevator 320 is connected to the upper conveying assembly 330. The upper conveying assembly 330 is connected to the top end of the machine body 40, and the discharge end of the upper conveying assembly 330 extends into the top of the tempering section 410.
[0043] It should be noted that the hopper 310 is used to store grain materials, while the elevator 320 is used to transport the grain materials to the top conveying assembly 330, and then the material is transported into the machine body 40 by the top conveying assembly 330 installed on the top of the machine body 40 for downward spreading. Therefore, the discharge end of the top conveying assembly 330 needs to extend into the top of the tempering section 410. The top conveying assembly 330 can be a conveyor belt combined with a motor for conveying.
[0044] Furthermore, it also includes a partition 230, the partition 230 having a triangular cross-section, the partition 230 being connected to the bottom of the drying chamber 110, and the bottom end of the partition 230 being spaced apart from the side wall of the grain flow channel 210.
[0045] It should be noted that the partition 230 is used to further control the discharge volume and efficiency of the grain material flowing into the discharge port 213. By connecting the partition 230 to the bottom of the drying chamber 110 and spaced apart from the side wall of the grain flow channel 210, a gap is formed to allow the grain to flow out, thereby reducing the channel size of the far-infrared drying channel 212 near the discharge port 213, so as to control the discharge effect and extend the far-infrared drying time in the far-infrared drying channel 212. Preferably, this gap distance can be set to 3mm to 4mm, and those skilled in the art can set it according to the required discharge efficiency.
[0046] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A far-infrared hot air combined grain dryer, characterized in that, It includes a machine body and a material spreading mechanism, a material discharging mechanism, a drying chamber, and a far-infrared emitting device, all connected to the machine body; wherein, The machine body includes a tempering section and a drying section, and the discharge end of the spreading mechanism is built into the top of the tempering section; The discharge mechanism includes a grain flow channel, the grain flow channel, the drying chamber, and the far-infrared emitting device are all located in the drying section. The grain flow channel is formed on the outside of the drying chamber, an air inlet is provided inside the drying chamber, and the far-infrared emitting device is located inside the drying chamber. The bottom end of the grain flow channel has a discharge port, and the side wall of the grain flow channel and the machine body together form an exhaust chamber. Ventilation holes are provided on the side walls of both the grain flow channel and the drying chamber, and an air outlet communicating with the exhaust chamber is provided on the machine body.
2. The far-infrared hot air combined grain dryer according to claim 1, characterized in that, The sidewall at the bottom of the grain flow channel is inclined downward toward the discharge port.
3. The far-infrared hot air combined grain dryer according to claim 2, characterized in that, The discharge mechanism also includes a discharge wheel, which is connected to the machine body and is rotatably mounted, and is located at the high end of the inclined sidewall at the bottom of the grain flow channel.
4. The far-infrared hot air combined grain dryer according to claim 3, characterized in that, The discharge wheel divides the grain flow channel into a hot air drying channel and a far-infrared drying channel, and the far-infrared emitting device is positioned close to the far-infrared drying channel.
5. The far-infrared hot air combined grain dryer according to claim 4, characterized in that, The width of the far-infrared drying channel is smaller than the width of the hot air drying channel.
6. The far-infrared hot air combined grain dryer according to claim 1, characterized in that, The material spreading mechanism includes a hopper, an elevator, and an upper conveying assembly. The hopper is connected to the bottom outer side of the machine body. The bottom end of the elevator is connected to the hopper. The top end of the elevator is connected to the upper conveying assembly. The upper conveying assembly is connected to the top end of the machine body, and the discharge end of the upper conveying assembly extends into the top of the slowing section.
7. The far-infrared hot air combined grain dryer according to claim 1, characterized in that, It also includes an exhaust fan, which is connected to the outside of the body and is connected to the air outlet of the exhaust chamber.
8. The far-infrared hot air combined grain dryer according to claim 1, characterized in that, It also includes a partition with a triangular cross-section, the partition being connected to the bottom of the drying chamber, and the bottom end of the partition being spaced apart from the side wall of the grain flow channel.
9. The far-infrared hot air combined grain dryer according to claim 2, characterized in that, The inclination angle of the sidewall at the bottom of the grain flow channel is 45° to 60°.