Novel infrared hot air chain plate type dryer

Abstract

A novel infrared hot air chain plate type dryer comprises a drying box, a feeding assembly is arranged on one side of the drying box, a discharging opening is formed in the bottom of the drying box, a conveying mechanism is arranged in the drying box, a hot air supply system is arranged above the conveying mechanism, and the hot air supply system comprises a heat exchange pipe set. A moisture removal assembly is arranged at the top of the drying box above the heat exchange tube group; the conveying mechanism comprises a plurality of layers of chain and chain wheel transmission assemblies, a set of surrounding type sliding ways are arranged on the inner sides of the chain and chain wheel assemblies, a plurality of chain plates are connected to the sliding ways in a sliding mode, the front end of each chain plate in the moving direction is rotationally connected with the corresponding chain and chain wheel transmission assembly, and a notch is formed in the upstream position of the direction changing position of each sliding way. According to the utility model, the comprehensive treatment of materials in the drying process is realized, the energy consumption is effectively reduced by virtue of a heat recovery mechanism, the drying efficiency is improved, and the drying quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, and in particular to a novel infrared hot air chain plate dryer. Background Technology

[0002] Tea, a popular beverage, requires drying during its processing. The drying process plays a crucial role in shaping the quality of tea. Drying not only removes excess moisture, prevents mold, and extends shelf life, but also enhances the aroma and creates a unique flavor and taste. Similarly, for many agricultural products with similar processing needs, such as medicinal herbs and dried fruits, the drying process directly impacts product quality and value. In the existing technology, Chinese utility model patent application number CN202020638805.X discloses an infrared hot air composite dryer. This device includes a drying chamber, a conveying mechanism, and a hot air circulation system. The conveying mechanism is located inside the drying chamber, and the hot air circulation system is connected to the drying chamber for circulating hot air.

[0003] While the technical solution in the aforementioned patent document utilizes two different heating methods—hot air and infrared heating tubes—to rapidly dry the material both internally and externally, thereby significantly improving drying efficiency and quality, it suffers from the following drawbacks: Firstly, the device can only dry the material on the upper layer of the conveyor belt. To ensure thorough drying, the number of conveyor belt layers must be increased, requiring more drive devices and thus increasing energy consumption. Secondly, although existing dryers can fully utilize internal heat, the drying process generates a large amount of moisture. This moisture cannot be promptly discharged from the drying chamber, and the high humidity environment hinders the continuous evaporation of moisture from the material, prolonging drying time and reducing drying efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a novel infrared hot air chain plate dryer. By using this device, the problems of insufficient space utilization leading to high energy consumption and poor moisture removal resulting in low drying efficiency in the aforementioned background technology are solved.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: a novel infrared hot air chain plate dryer, comprising a drying chamber, a feeding assembly on one side of the drying chamber, a discharge port at the bottom of the drying chamber, a conveying mechanism inside the drying chamber, a hot air supply system above the conveying mechanism, the hot air supply system comprising a heat exchange tube assembly, and a dehumidification assembly at the top of the drying chamber above the heat exchange tube assembly;

[0006] The conveying mechanism includes a multi-layer chain and sprocket drive assembly. A set of circular slides is provided on the inner side of the chain and sprocket drive assembly. Multiple chain plates are slidably connected on the slides. The front end of each chain plate in the direction of movement is rotatably connected to the chain and sprocket drive assembly. A notch is provided upstream of the direction change point of the slide.

[0007] Preferably, the slide includes an input section and a return section. The input section is located on the upper side of the sprocket in the chain sprocket drive assembly, and the return section is located on the lower side of the sprocket in the chain sprocket drive assembly. The two notches are provided at the ends of the input section and the return section, and the width of the notches is greater than the width of the chain plate.

[0008] Preferably, the heat exchange tube group consists of multiple heat exchange tubes, which are distributed in a rectangular array.

[0009] Preferably, the hot air supply system further includes an axial flow fan and an electric heating tube. The axial flow fan is installed on the outer wall of the drying chamber, and the electric heating tube is installed inside the drying chamber. The axial flow fan and the electric heating tube are connected by multiple heat exchange tubes. Two hot air channels are provided in the inner walls on both sides of the drying chamber. Each hot air channel is connected to the electric heating tube by a pipe, and each hot air channel is provided with multiple layers of hot air holes.

[0010] Preferably, three sets of infrared heating tubes are installed between the inner walls on both sides of the drying oven, and the three sets of infrared heating tubes are alternately distributed with two sets of hot air channels.

[0011] Preferably, the dehumidification assembly includes two dehumidification hoods, which are disposed on the top wall of the drying chamber and connected to the interior of the drying chamber. A dehumidification centrifugal fan is connected to the top of each of the two dehumidification hoods.

[0012] Preferably, the chain plate has multiple air vents inside, each of which is equipped with an air vent mesh. Rotary wheels are rotatably connected to both sides of the multiple air vents. Two of the rotary wheels are slidably connected to the slide rail. A sleeve is provided at the front end of the chain plate in the direction of movement. A pin is rotatably connected in the sleeve. Both ends of the pin are rotatably connected to the chain and sprocket transmission assembly.

[0013] Preferably, one end of the uppermost chain and sprocket drive assembly extends into the feed assembly.

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

[0015] 1. Reduced drying energy consumption: In the conveying mechanism, the chain and sprocket drive assembly drives the chain plate to move along the circular slide. The notches at the ends of the slide input and return sections cause the chain plate to tilt vertically when it reaches the notch. This causes the material on the upper chain plate in the same chain and sprocket drive assembly to pour onto the lower chain plate, and the material on the lower chain plate in the adjacent upper chain and sprocket drive assembly pours onto the upper chain plate in the lower chain and sprocket drive assembly. This continuous cyclic conveying allows the material to move in all directions within the multi-layer chain and sprocket drive assembly. The material can receive hot air and infrared radiation on each chain plate, avoiding the limitation of only drying the material on the upper layer of the conveyor belt, reducing the need to increase the number of conveyor belt layers, and reducing energy consumption caused by adding a drive device.

[0016] 2. Improved dehumidification efficiency: During the drying process, the moisture generated rises, and two dehumidification hoods on the top wall of the drying chamber collect the rising moisture. The centrifugal fan connected to the top of the dehumidification hoods discharges the collected moisture from the drying chamber, maintaining a low humidity environment inside the drying chamber. This ensures continuous evaporation of moisture from the material, shortening the drying time. During the process of moisture rising and being discharged from the drying chamber, the moisture passes through the heat exchange tube assembly, using the heat of the moisture to heat the air in the heat exchange tube assembly, achieving secondary utilization of heat. This prevents moisture from accumulating inside the chamber and hindering the evaporation of moisture from the material, thus improving drying efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the positional relationship between the axial flow fan and the electric heating element in this utility model;

[0019] Figure 3 This is a schematic diagram of the slide rail structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the chain plate in this utility model.

[0021] In the diagram: 1. Drying oven; 2. Feeding assembly; 3. Conveying mechanism; 31. Chain and sprocket drive assembly; 32. Slide rail; 321. Input section; 322. Return section; 33. Chain plate; 331. Vent; 332. Vent mesh; 333. Rotary wheel; 334. Sleeve; 335. Pin; 34. Notch; 4. Hot air supply system; 41. Heat exchange tube assembly; 411. Heat exchange tube; 42. Axial flow fan; 43. Electric heating tube; 44. Hot air passage; 45. Hot air vent assembly; 5. Dehumidification assembly; 51. Dehumidification hood; 52. Dehumidification centrifugal fan; 6. Infrared electric heating tube assembly; 7. Discharge port. 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] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0024] Combination Figures 1-4 A novel infrared hot air chain plate dryer includes a drying chamber 1. A feeding assembly 2 is located on one side of the drying chamber 1, used to convey tea leaves or other materials to be dried into the drying chamber 1. A discharge port 7 is located at the bottom of the drying chamber 1, facilitating the discharge of dried materials. A conveying mechanism 3 is located inside the drying chamber 1, used to carry and convey materials. A hot air supply system 4 is located above the conveying mechanism 3, providing hot air for the drying process. The hot air supply system 4 includes a heat exchange tube assembly 41, which can recover heat from the high-temperature moisture generated during the drying process, achieving secondary heat utilization. A dehumidification assembly 5 is located at the top of the drying chamber 1 above the heat exchange tube assembly 41, for timely dehumidification. The moisture inside the drying chamber 1 is removed to maintain a low humidity environment and ensure continuous and efficient drying of materials. The conveying mechanism 3 includes a multi-layer chain and sprocket drive assembly 31, which is driven by a motor to rotate and drive the chain plates 33 to move. A set of circular slide rails 32 is provided on the inner side of the chain and sprocket drive assembly 31. Multiple chain plates 33 are slidably connected on the slide rails 32. The front end of each chain plate 33 in the direction of movement is rotatably connected to the chain and sprocket drive assembly 31. The slide rails 32 support the chain plates 33 as a whole, so that the multiple chain plates 33 are arranged horizontally and closely to form a material conveying platform. A notch 34 is provided upstream of the direction change of the slide rails 32. When the chain plate 33 runs to the notch 34, the chain plate 33 tilts due to the loss of support from the slide rails 32, and the material is poured between different layers of chain plates 33.

[0025] The slide 32 includes an input section 321 and a return section 322. The input section 321 is located on the upper side of the sprocket in the chain sprocket drive assembly 31, and the return section 322 is located on the lower side of the sprocket in the chain sprocket drive assembly 31. Two notches 34 are provided at the ends of the input section 321 and the return section 322. The width of the notches 34 is greater than the width of the chain plate. When the chain plate 33 runs to the notch 34, the chain plate 33 tilts vertically due to losing the support of the slide 32, thereby realizing the transfer of materials between different layers of chain plates 33.

[0026] The heat exchange tube assembly 41 consists of multiple heat exchange tubes 411 arranged in a rectangular array, which increases the heat exchange area and makes the heat exchange between the high-temperature humid air and the air inside the heat exchange tubes 411 more complete, thereby improving the heat recovery efficiency.

[0027] The hot air supply system 4 also includes an axial flow fan 42 and an electric heating tube 43. The axial flow fan 42 is installed on the outer wall of the drying chamber 1 and is responsible for drawing external air into the drying chamber 1. The electric heating tube 43 is installed inside the drying chamber 1 and heats the drawn-in air. The axial flow fan 42 and the electric heating tube 43 are connected by multiple heat exchange tubes 411. Two hot air channels 44 are provided in the inner walls on both sides of the drying chamber 1. Each hot air channel 44 is connected to the electric heating tube 43 through a pipe. Each hot air channel 44 is provided with multiple layers of hot air hole groups 45. The heated air is blown out through the hot air channels 44 and the hot air hole groups 45 to dry the material on the chain plate 33.

[0028] Three sets of infrared electric heating tubes 6 are installed between the inner walls on both sides of the drying oven 1. The three sets of infrared electric heating tubes 6 and two sets of hot air channels 44 are alternately distributed, so that hot air and infrared radiation can act on the material alternately, making the heating surface of the material more uniform and further improving the drying quality.

[0029] The dehumidification assembly 5 includes two dehumidification hoods 51, which are installed on the top wall of the drying chamber 1 and connected to the interior of the drying chamber 1. They are used to collect the moisture generated and rising during the drying process. The top of each of the two dehumidification hoods 51 is connected to a dehumidification centrifugal fan 52. The dehumidification centrifugal fan 52 discharges the collected moisture from the drying chamber 1, effectively maintaining a low humidity environment inside the drying chamber 1, ensuring continuous evaporation of moisture from the material, and shortening the drying time.

[0030] The chain plate 33 has multiple ventilation holes 331 inside, and each ventilation hole 331 is equipped with a ventilation net 332. The ventilation net 332 can prevent materials from falling and allow hot air and infrared radiation to pass through, so as to fully act on the materials. The two sides of the multiple ventilation holes 331 are rotatably connected to the rotating wheels 333. The two rotating wheels 333 are slidably connected to the slide rail 32, providing support and guidance for the movement of the chain plate 33 on the slide rail 32. The front end of the chain plate 33 in the direction of movement is provided with a sleeve 334. A pin 335 is rotatably connected in the sleeve 334. The two ends of the pin 335 are rotatably connected to the chain sprocket drive assembly 31, realizing the connection between the chain plate 33 and the chain sprocket drive assembly 31, so that the chain plate 33 can move under the drive of the chain sprocket drive assembly 31.

[0031] One end of the top-level chain and sprocket drive assembly 31 extends into the feeding assembly 2, ensuring that the material to be dried can be smoothly and accurately transferred from the feeding assembly 2 to the chain and sprocket drive assembly 31 to start the subsequent drying process.

[0032] Working principle:

[0033] Feeding assembly 2 is responsible for conveying the tea leaves or other materials to be dried to the uppermost chain and sprocket drive assembly 31. One end of the chain and sprocket drive assembly 31 extends into the feeding assembly 2, ensuring that the materials smoothly enter the drying chamber 1. The motor acts as the drive source, driving the chain and sprocket drive assembly 31 to rotate. Under the traction of the chain and sprocket drive assembly 31, the chain plates 33 move along the surrounding slide rails 32. The front end of the chain plates 33 is rotatably connected to the chain and sprocket drive assembly 31 through pins 335. The wheels 333 on both sides of the chain plates 33 slide on the slide rails 32, which provide full support for the chain plates 33, allowing multiple chain plates 33 to be closely arranged to form a stable material carrying platform. The chain plates 33 are equipped with vents 331 and vent mesh 332 to prevent materials from falling. It also allows hot air and infrared radiation to fully act on the material, enhancing the drying effect. When the chain plate 33 runs to the notch 34 at the end of the slide input section 321 and the return section 322, since the width of the notch 34 is greater than that of the chain plate 33, the chain plate 33 loses the support of the slide 32 and tilts vertically at the notch 34. This causes the material on the upper chain plate 33 in the same chain sprocket drive assembly 31 to fall onto the lower chain plate 33. At the same time, the material on the lower chain plate 33 in the adjacent upper chain sprocket drive assembly 31 will also fall onto the upper chain plate 33 in the lower chain sprocket drive assembly 31. This cycle continues until the material is discharged from the outlet 7, realizing the all-round movement of the material in the multi-layer chain sprocket drive assembly 31. This effectively improves the space utilization of the equipment and reduces the energy consumption caused by adding a drive device.

[0034] The axial flow fan 42 of the hot air supply system 4 draws external air into the drying chamber 1. After being heated by the electric heating tube 43, the air is transported to the hot air channel 44 through the hot air channel 44 and the pipeline. The channel 44 has a hot air hole group 45. The hot air is blown out from the hot air hole group 45 to dry the material on the chain plate 33. At the same time, three sets of infrared electric heating tube groups 6 are distributed between the inner walls on both sides of the drying chamber 1 to heat the material by thermal radiation. The alternating heating method of hot air and infrared radiation ensures that the material is heated more evenly and significantly improves the drying quality.

[0035] During the drying process, the moisture in the material evaporates to form humid air. The humid air rises, and the two humidification hoods 51 of the humidification component 5 are set on the top wall of the drying chamber 1 to collect the rising humid air. The humidification centrifugal fan 52 connected to the top of the humidification hood 51 discharges the collected humid air from the drying chamber 1, maintaining a low humidity environment inside the drying chamber 1, ensuring continuous evaporation of moisture in the material, and effectively shortening the drying time. During the process of humid air rising and being discharged from the drying chamber 1, the humid air passes through the heat exchange tube group 41. Since the humid air has a high temperature, this heat can be used to heat the air in the heat exchange tube group 41, realizing the secondary utilization of heat.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel infrared hot air chain plate dryer, comprising a drying box (1), one side of the drying box (1) is provided with a feeding assembly (2), and the bottom of the drying box (1) is provided with a discharge port (7), characterized in that: The inside of the drying box (1) is provided with a conveying mechanism (3), the conveying mechanism (3) is provided with a hot air supply system (4) above, the hot air supply system (4) comprises a heat exchange pipe group (41), the top of the drying box (1) is provided with a moisture removal assembly (5) above the heat exchange pipe group (41); The conveying mechanism (3) comprises a multilayer chain and sprocket transmission assembly (31), a group of circumferential slides (32) are arranged on the inner side of the chain and sprocket transmission assembly (31), a plurality of chain plates (33) are slidably connected on the slides (32), the front end of each chain plate (33) in the movement direction is rotatably connected with the chain and sprocket transmission assembly (31), and a gap (34) is arranged at the upstream position of the direction change of the slide (32).

2. A novel infrared hot air chain-paddle dryer as claimed in claim 1, wherein: The slide (32) comprises an input part (321) and a return part (322), the input part (321) is located on the upper side of the sprocket in the chain and sprocket transmission assembly (31), the return part (322) is located on the lower side of the sprocket in the chain and sprocket transmission assembly (31), and the two gaps (34) are arranged at the terminal positions of the input part (321) and the return part (322). The width of the gap (34) is greater than the width of the chain plate (33).

3. A novel infrared hot air chain-paddle dryer as claimed in claim 1, wherein: The heat exchange pipe group (41) is composed of a plurality of heat exchange pipes (411), and the plurality of heat exchange pipes (411) are arranged in a rectangular array.

4. A novel infrared hot-air chain-paddle dryer as claimed in claim 3, wherein: The hot air supply system (4) further comprises an axial flow fan (42) and an electric heating pipe (43), the axial flow fan (42) is installed on the outer wall of the drying box (1), the electric heating pipe (43) is arranged in the inside of the drying box (1), the axial flow fan (42) and the electric heating pipe (43) are connected through a plurality of heat exchange pipes (411), two hot air channels (44) are arranged in the inner walls on both sides of the drying box (1), each hot air channel (44) is connected with the electric heating pipe (43) through a pipeline, and a plurality of hot air hole groups (45) are arranged in each hot air channel (44).

5. A novel infrared hot air chain-paddle dryer as claimed in claim 4, wherein: Three groups of infrared electric heating pipe groups (6) are installed between the inner walls on both sides of the drying box (1), and the three groups of infrared electric heating pipe groups (6) are alternately distributed with the two groups of hot air channels (44).

6. A novel infrared hot air chain-paddle dryer as claimed in claim 1, wherein: The moisture removal assembly (5) comprises two moisture removal covers (51), the two moisture removal covers (51) are arranged on the top wall of the drying box (1) and are connected with the inside of the drying box (1), and a moisture removal centrifugal fan (52) is connected with the top of each moisture removal cover (51).

7. A novel infrared hot air chain-paddle dryer as claimed in claim 1, wherein: A plurality of air vents (331) are arranged in the inside of the chain plate (33), an air permeable net (332) is arranged in each air vent (331), rotating wheels (333) are rotatably connected on the two sides of the plurality of air vents (331), the two rotating wheels (333) are slidably connected with the slide (32), a sleeve (334) is arranged at the front end of the chain plate (33) in the movement direction, a pin rod (335) is rotatably connected in the sleeve (334), and the two ends of the pin rod (335) are rotatably connected with the chain and sprocket transmission assembly (31).

8. A novel infrared hot air chain-paddle dryer as claimed in claim 1, wherein: One end of the chain and sprocket transmission assembly (31) of the uppermost layer extends into the feeding assembly (2).

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