Far infrared hot air combined grain dryer
By combining hot air and far infrared in a grain dryer, the problems of large energy consumption and low drying efficiency in the prior art are solved, and a more efficient and higher quality drying process is achieved.
Patent Information
- Application Number
- CN202411994082.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-07
AI Technical Summary
The existing grain dryers consume a large amount of energy, have low drying efficiency, and have low grain drying efficiency during pure convection drying.
The far infrared hot air combined dryer is used to heat the surface of the material through hot air to remove surface moisture, and heat it from the inside with far infrared rays to promote the migration of internal moisture outward.
It improves drying efficiency, reduces the number of cereal cycles, improves drying quality, and reduces energy consumption.
Smart Images
Figure CN119573363A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of dryers, in particular to a far-infrared hot air combined grain dryer. Background Art
[0002] Dryer is one of the commonly used equipment for drying grains. Drying technology is usually divided into normal pressure and vacuum drying according to pressure; divided into intermittent and continuous types according to operation mode; and divided into convection drying, conduction drying and radiation drying according to the different ways of heat energy transfer to wet materials.
[0003] Existing grain dryers generally use single hot air convection drying as the main method, using a single burner or hot air furnace, which consumes relatively large amounts of energy and has insufficient heat exchange efficiency. On the other hand, existing dryers use convection heat exchange to dry grains. The grain moisture is first dried from the surface, and then migrates from the inside to the outside after the surface water is dried. At this time, the inside of the grain needs to be heated first, so the grain drying efficiency is low during pure convection drying.
[0004] In view of this, it is necessary to propose a far-infrared hot air combined grain dryer to solve or at least alleviate the above-mentioned defects. Summary of the invention
[0005] The main purpose of the present invention is to provide a far-infrared hot air combined grain dryer to solve the problems of high energy consumption and low drying efficiency of grain dryers in the prior art.
[0006] To achieve the above object, the present invention provides a far-infrared hot air combined grain dryer, comprising 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,
[0007] The machine body comprises a slow drying section and a drying section, and the discharging end of the material spreading mechanism is built into the top of the slow drying 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 arranged in the drying section, the grain flow channel is formed outside the drying chamber, an air inlet is opened in the drying chamber, and the far-infrared emitting device is arranged in the drying chamber;
[0009] The bottom end of the grain flow channel is provided with a discharge port, the side wall of the grain flow channel and the machine body together form an exhaust chamber, the grain flow channel and the side walls of the drying chamber are both provided with ventilation holes, and the machine body is provided with an air outlet connected to the exhaust chamber.
[0010] Preferably, the side wall at the bottom of the grain flow channel is inclined downward toward the discharge port.
[0011] Preferably, the discharge mechanism further comprises a discharge wheel, which is connected to the machine body and rotatably arranged, and the discharge wheel is arranged at the high end of the inclined side wall 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 arranged 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 outer bottom end of the machine body, the bottom end of the elevator is communicated with the hopper, the top end of the elevator is communicated with 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 slow-release section.
[0015] Preferably, an exhaust fan is further included, wherein the exhaust fan is connected to the outside of the machine body, and the exhaust fan is communicated with the air outlet of the exhaust chamber.
[0016] Preferably, it further comprises a partition, the cross section of which is triangular, 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 side wall 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] A far-infrared hot air combined grain dryer provided by the present invention comprises a machine body and a spreading mechanism, a discharging mechanism, a drying chamber and a far-infrared emitting device all connected to the machine body, the machine body comprises a slow drying section and a drying section, the discharging end of the spreading mechanism is built into the top of the slow drying section, the discharging mechanism comprises a grain flow channel, the grain flow channel, the drying chamber and the far-infrared emitting device are all arranged in the drying section, the grain flow channel is formed on the outside of the drying chamber, the drying chamber is provided with an air inlet, and the far-infrared emitting device is arranged in the drying chamber, the bottom end of the grain flow channel is provided with a discharging port, the side wall of the grain flow channel and the machine body are combined to form an exhaust chamber, ventilation holes are provided on the grain flow channel and the side wall of the drying chamber, and an air outlet connected to the exhaust chamber is provided on the machine body. In this way, a combined drying method of hot air + far infrared rays is adopted. When the grains pass through the upper part of the grain flow channel, the hot air heats the surface of the material and removes the surface moisture. When the grains pass through the lower part of the grain flow channel, they are irradiated by far infrared rays to heat the grains from the inside, accelerate the speed of the internal moisture of the grains to migrate outward, improve the drying efficiency, and thus reduce the number of grain cycles, improve the grain drying quality, and reduce the drying energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 It is a schematic diagram of the internal cross-section of the overall structure in one embodiment of the present invention;
[0022] Figure 2 It is a schematic diagram of the external side of the overall structure in one embodiment of the present invention;
[0023] Figure 3 It is a schematic diagram of the internal hot air and far infrared ray flow in an application scenario in one embodiment of the present invention.
[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.
[0025] Description of Figure Numbers:
[0026] 110. Drying chamber; 120. Far-infrared emitting device; 130. Exhaust fan; 20. Discharging mechanism; 210. Grain flow channel; 211. Hot air drying channel; 212. Far-infrared drying channel; 213. Discharging port; 214. Exhaust chamber; 220. Discharging wheel; 230. Partition; 30. Spreading mechanism; 310. Hopper; 320. Elevator; 330. Upper conveying assembly; 40. Machine body; 410. Suspension section; 420. Drying section. DETAILED DESCRIPTION
[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0031] Please see attached Figure 1-3In one embodiment of the present invention, a far-infrared hot air combined grain dryer includes a machine body 40 and a spreading mechanism 30, a discharging mechanism 20, a drying chamber 110 and a far-infrared emitting device 120 all connected to the machine body 40. First of all, it should be noted that, unlike the grain dryers in the prior art which generally use single hot air convection drying as the main method, a single burner or hot air furnace is used, which consumes relatively large amounts of energy and has insufficient heat exchange efficiency; on the other hand, the existing dryers use convection heat exchange to dry grains, and the moisture in the grains is first dried from the surface, and then migrates from the inside to the outside after the surface water is dried. At this time, the inside of the grains needs to be heated first, so the grain drying efficiency is low during pure convection drying. The present application solves the above-mentioned defects in the prior art by providing a far-infrared hot air combined grain dryer, as follows:
[0032] The machine body 40 includes a slow-release section 410 and a drying section 420, and the discharging end of the spreading mechanism 30 is built into the top of the slow-release section 410; the discharging mechanism 20 includes a grain flow channel 210, and the grain flow channel 210, the drying chamber 110, and the far-infrared emitting device 120 are all arranged in the drying section 420, the grain flow channel 210 is formed on the outside of the drying chamber 110, the drying chamber 110 is provided with an air inlet, and the far-infrared emitting device 120 is arranged in the drying chamber 110; the bottom end of the grain flow channel 210 is provided with a discharging port 213, and the side wall of the grain flow channel 210 and the machine body 40 are combined to form an exhaust chamber 214, the grain flow channel 210 and the side wall of the drying chamber 110 are provided with ventilation holes, and the machine body 40 is provided with an air outlet connected to the exhaust chamber 214.
[0033] Specifically, the far-infrared hot air combined grain dryer in the present application includes a body 40, a material spreading mechanism 30, a material discharging mechanism 20, a drying chamber 110 and a far-infrared emitting device 120, wherein the body 40 constitutes a closed chamber for drying, and is used for installing the material spreading mechanism 30, the material discharging mechanism 20, the drying chamber 110 and the far-infrared emitting device 120, and includes a slow-release section 410 and a drying section 420, wherein the slow-release section 410 is used to reduce the internal thermal stress shock caused during the drying process, and to avoid the grain surface from shrinking and hardening. and browning, which affect the quality of the dried products, and the drying section 420 is used to dry the grains; the spreading mechanism 30 is used to spread the grains downward, so its discharge end is built into the top of the slow revival section 410, so that the grains first pass through the slow revival section 410 and then enter 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, the material is transported and discharged to the next stage during the drying process. It is worth mentioning that a plurality of drying mechanisms 10 can be arranged side by side to increase the drying effect.
[0034] Among them, the discharge mechanism 20 includes a grain flow channel 210, and the grain flow channel 210 is used to receive the grains that fall through the slow drying section 410 in preparation for drying. The grain flow channel 210 is formed on the outside of the drying chamber 110, and can be formed by setting a flow plate to enclose 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 arranged in the drying section 420, and the drying chamber 110 is used as a heat source, and this heat source includes hot air and far-infrared rays. Therefore, the interior of the drying chamber 110 is used to introduce hot air, so it is necessary to open a heat exchanger connected to the external heat source in the drying chamber 110. The far-infrared emitting device 120 is arranged in the drying chamber 110 to cooperate with the hot air for drying. The far-infrared ray is a band of infrared rays, which is a kind of electromagnetic wave. The far-infrared drying is drying by radiation heat transfer. The far-infrared ray propagates in a straight line at the speed of light to reach the material to be dried. When the emission frequency of the far-infrared ray matches the inherent frequency of the molecular motion in the material to be dried, the molecules in the material are caused to vibrate strongly, and intense friction occurs inside the material to generate heat to achieve the purpose of drying. The far-infrared heat is highly concentrated and has the characteristics of strong penetration ability, so as to heat the dried object from the inside.
[0035] It is worth mentioning that the bottom end of the grain flow channel 210 is a discharge port 213. After the grains fall through the slow section 410, they enter the grain flow channel 210. On the way to the discharge port 213, they are dried by the central drying mechanism 10. The outer side of the grain flow channel 210 and the machine body 40 are surrounded to form an exhaust chamber 214. The exhaust chamber 214 is used to discharge the hot air after the drying effect is generated to form an air circulation system. Therefore, the side walls of the grain flow channel 210 and the drying chamber 110 need to be Ventilation holes are provided to ensure that the hot air in the drying chamber 110 flows out to first dry the grains in the grain flow channel 210 with hot air, then flows out to the exhaust chamber 214 through the ventilation holes of the grain flow channel 210, and then is discharged from the air outlet in the exhaust chamber 214; in the present application as a preferred embodiment, an exhaust fan 130 is installed on the outer wall of the body 40, and 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 keep the interior in a long-term dry environment.
[0036] As a preferred embodiment of the present invention, the side wall at the bottom of the grain flow channel 210 is inclined downward toward the discharge port 213 .
[0037] It should be noted that this is done so that the grains can flow to the bottom of the grain flow channel 210 and converge toward the discharge port 213. At the same time, the inclined setting can facilitate the falling of the grains and avoid grain accumulation. Preferably, the inclination angle can be set to 45° to 60°, and technicians in this field can set it according to needs.
[0038] As a preferred embodiment of the present invention, the discharge mechanism 20 also includes a discharge wheel 220, which is connected to the machine body 40 and is rotatably arranged, and the discharge wheel 220 is arranged 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 discharging wheel 220 can adjust the discharging speed to avoid the problem of discharging too quickly to cause material piling, or discharging too slowly to affect the production process; wherein, the discharging wheel 220 is arranged at the high end of the inclined side wall at the bottom of the grain flow channel 210, so as to divide 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 arranged above the discharging wheel 220, so as to mainly perform preliminary drying by hot air drying; and the far-infrared drying channel 212 is arranged below the discharging wheel 220, so as to mainly perform far-infrared drying, so the far-infrared emitting device 120 when arranged in the drying chamber 110 needs to be arranged close to the far-infrared drying channel 212, so as to perform internal drying of the far-infrared waves emitted by the far-infrared drying channel 212, for details, please refer to the attached Figure 3 Schematic diagram of the flow of medium-heat air and far-infrared rays.
[0040] As a preferred embodiment of the present invention, 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 can, firstly, slow down the discharge volume, thereby reducing the amount of grain accumulation, and secondly, ensure that the far-infrared drying effect is more complete, and there will be no problem of too much grain resulting in poor drying effect of the grain in the middle part.
[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 outer bottom end of the body 40, the bottom end of the elevator 320 is communicated with the hopper 310, the top end of the elevator 320 is communicated with the upper conveying assembly 330, the upper conveying assembly 330 is connected to the top end of the body 40, and the discharge end of the upper conveying assembly 330 extends into the top setting of the slow-release section 410.
[0043] It should be noted that the hopper 310 is used to store grain materials, and the elevator 320 is used to transport the grain materials to the top conveying assembly 330, and then the materials are transported into the machine body 40 through the upper conveying assembly 330 installed on the top of the machine body 40 to spread the materials downward. Therefore, the discharge end of the upper conveying assembly 330 needs to extend to the top setting of the slow-release section 410; wherein, the upper conveying assembly 330 can adopt a conveyor belt combined with a motor for transportation.
[0044] Furthermore, a partition 230 is included, the cross section of the partition 230 is triangular, the partition 230 is connected to the bottom of the drying chamber 110, and the bottom end of the partition 230 is 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 discharge efficiency of the grain material flowing into the discharge port 213. The partition 230 is connected to the bottom of the drying chamber 110 and is spaced apart from the side wall of the grain flow channel 210 to form a spacing for the grain to flow out, thereby reducing the channel size of the far-infrared drying channel 212 near the discharge port 213 to achieve the effect of controlling the discharge, thereby extending the time for far-infrared drying in the far-infrared drying channel 212; preferably, this spacing distance can be set to 3mm~4mm, and technical personnel in this field can set it according to the required discharge efficiency.
[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
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 comprises a slow drying section and a drying section, and the discharging end of the material spreading mechanism is built into the top of the slow drying section; The discharge mechanism includes a grain flow channel, the grain flow channel, the drying chamber, and the far-infrared emitting device are all arranged in the drying section, the grain flow channel is formed outside the drying chamber, an air inlet is opened in the drying chamber, and the far-infrared emitting device is arranged in the drying chamber; The bottom end of the grain flow channel is provided with a discharge port, the side wall of the grain flow channel and the machine body together form an exhaust chamber, the grain flow channel and the side walls of the drying chamber are both provided with ventilation holes, and the machine body is provided with an air outlet connected to the exhaust chamber.
2. The far-infrared hot air combined grain dryer according to claim 1, characterized in that: The side wall 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 discharging mechanism further comprises a discharging wheel, which is connected to the machine body and is rotatably arranged. The discharging wheel is arranged at the high end of the inclined side wall at the bottom of the grain flow channel.
4. The far-infrared hot air combined grain dryer according to claim 3 is 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 arranged 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 outer bottom end of the machine body, the bottom end of the elevator is communicated with the hopper, the top end of the elevator is communicated with 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 slow-release 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 machine 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 whose cross section is triangular. 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.
9. The far-infrared hot air combined grain dryer according to claim 2, characterized in that: The inclination angle of the side wall at the bottom of the grain flow channel is 45° to 60°.