Drying equipment

Abstract

The invention relates to the field of material drying, and provides a drying device which comprises a drying chamber provided with a cavity for drying materials; the material conveying device is connected with the drying chamber and used for moving materials and entering and exiting the chamber; the material recycling device is arranged in the cavity and used for cleaning and recycling materials attached to the material conveying device; the heat pump device is used for generating hot air to dry the materials; and the airflow power device is connected with the drying chamber and used for driving hot air to flow, and the heat pump device is further used for recycling exhausted hot air waste heat. Dynamic drying is achieved through the material conveying device, and the drying efficiency is improved. And leaked material recovery is achieved through the material recovery device, material loss is reduced, and resource waste is avoided. The heat pump device heats outside air by recycling hot air waste heat discharged by the drying chamber, system energy consumption is reduced, waste heat waste is avoided, and the purposes of saving energy, reducing emission and reducing equipment energy consumption are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of material drying, and in particular to a drying device. Background Art

[0002] Drying is an important unit operation to reduce the moisture content of materials. It is an indispensable part of the processing of many foods, medicines, agricultural products, etc. Hot air drying refers to the use of hot air as a drying medium to exchange heat with the material to remove moisture. Due to the evaporation of moisture on the surface of the material, a difference in moisture concentration occurs between the surface and the inside of the material, which in turn causes the internal moisture to diffuse to the surface, thereby achieving the purpose of complete drying. It has the advantages of low cost and easy management.

[0003] At present, the main heating forms of traditional hot air drying include electric heating, coal burning / burning other fossil fuels heating and biomass heating, etc. However, these heating forms will produce a large waste of energy, and there is a problem of large carbon emissions, causing great pollution to the environment.

[0004] At present, the commonly used drying forms of hot air drying are static drying and dynamic drying. However, as the drying process proceeds, static drying is prone to uneven drying, which affects the quality of the material, affects the migration of moisture inside the material, and reduces the drying rate. Dynamic drying is prone to material adhesion on the conveyor belt, resulting in material leakage, causing resource waste.

[0005] Therefore, providing a new type of drying equipment has become an important technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0006] The object of the present invention is to provide a drying device to at least solve one of the technical problems existing in the prior art.

[0007] In order to achieve the above object, the present invention provides a drying device, comprising:

[0008] A drying chamber, which has a chamber inside for drying materials;

[0009] A material transport device connected to the drying chamber, the material transport device is used to move materials into and out of the chamber and drive the materials to move within the chamber;

[0010] A material recovery device, disposed in the chamber, for cleaning and recovering materials attached to the material transport device;

[0011] A heat pump device, used for exchanging heat with external air to generate hot air, and the hot air is used for exchanging heat with the material in the chamber;

[0012] An airflow power device is connected to the drying chamber, and is used to drive the hot air to flow in the chamber and discharge the hot air after heat exchange out of the chamber, and the heat pump device is also used to recover the waste heat of the hot air after heat exchange.

[0013] According to the drying equipment provided by the present invention, the drying chamber is provided with a feed inlet and a discharge outlet communicated with the chamber, and the material transport device comprises:

[0014] A feeding conveyor belt connected to the feeding port, the feeding conveyor belt is used to feed the material into the drying chamber;

[0015] A material transport conveyor belt, one end of which is connected to the feed port and the other end of which is connected to the discharge port, the material transport conveyor belt is used to receive the material transported by the feeding conveyor belt and drive the material to move in the chamber;

[0016] A discharging conveyor belt is connected to the discharging port, and is used to receive the material transported by the transport conveyor belt and move the material out of the drying chamber.

[0017] According to the drying equipment provided by the present invention, the material recovery device comprises:

[0018] A brush assembly is in contact with the material conveyor belt, and the brush assembly is used to remove materials adhering to the material conveyor belt;

[0019] The material collecting assembly is arranged below the material transporting conveyor belt and is used for collecting fallen materials.

[0020] According to the drying equipment provided by the present invention, the aggregate assembly comprises:

[0021] The partition is arranged at the bottom of the drying chamber, and the partition is slidably connected to the drying chamber. The drying chamber is correspondingly provided with an inlet and outlet for the partition to enter and exit.

[0022] According to the drying device provided by the present invention, the heat pump device comprises a compressor, a condenser, a throttling assembly and an evaporator which are arranged in sequence and connected end to end to form a refrigerant circulation loop.

[0023] The condenser includes a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, the first heat exchange channel is located in the refrigerant circulation circuit, and the second heat exchange channel is connected to the external air.

[0024] The evaporator includes a third heat exchange channel and a fourth heat exchange channel for exchanging heat with each other, the third heat exchange channel is located in the refrigerant circulation circuit, and the fourth heat exchange channel is connected to the hot air discharged from the drying chamber.

[0025] According to the drying equipment provided by the present invention, the drying chamber is provided with an air inlet and an air outlet connected to the chamber, and the airflow power device comprises:

[0026] a first fan connected to the air inlet, and the first fan is connected to the second heat exchange channel through an air inlet pipe;

[0027] a second fan connected to the exhaust port, and the second fan is connected to the fourth heat exchange channel through an exhaust pipe;

[0028] A bypass pipe, one end of which is connected to the exhaust port, and the other end of which is connected to the inlet of the second heat exchange channel.

[0029] According to the drying equipment provided by the present invention, the airflow power device further comprises:

[0030] A bypass valve is arranged in the bypass pipe, and the bypass valve is used to adjust the gas flow in the bypass pipe.

[0031] According to the drying equipment provided by the present invention, the airflow power device further comprises:

[0032] A grille is arranged at the position of the air inlet, and the grille is used to prevent materials from being sucked into the air inlet.

[0033] According to the drying device provided by the present invention, the number of the air inlets is at least two, and the air inlets are spaced apart along the length direction of the drying chamber; and / or,

[0034] The number of the exhaust ports is at least two, and the exhaust ports are spaced apart along the length direction of the drying chamber.

[0035] According to the drying equipment provided by the present invention, the number of the transport conveyor belts is at least two, and the transport conveyor belts are spaced apart along the height direction of the drying chamber. The movement directions of two adjacent transport conveyor belts are opposite, and the blanking end of the upper transport conveyor belt and the receiving end of the lower transport conveyor belt are correspondingly arranged and connected.

[0036] The drying equipment provided by the present invention includes: a drying chamber, which has a chamber for drying materials inside; a material transportation device connected to the drying chamber, the material transportation device is used to move materials into and out of the chamber, and drive the materials to move in the chamber; a material recovery device is arranged in the chamber, the material recovery device is used to clean and recover materials attached to the material transportation device; a heat pump device is used to perform heat exchange with external air to generate hot air, and the hot air is used to perform heat exchange with the materials in the chamber; an airflow power device is connected to the drying chamber, the airflow power device is used to drive the hot air to flow in the chamber, and discharge the hot air after heat exchange out of the chamber, and the heat pump device is also used to recover the waste heat of the hot air after heat exchange.

[0037] With this arrangement, the material transport device drives the material to move, forming dynamic drying, avoiding uneven drying and improving drying efficiency. The material recovery device can also be used to recycle the material, reduce material loss, avoid resource waste, and effectively improve material utilization. At the same time, the heat pump device also recovers the waste heat of the hot air discharged from the drying chamber to heat the external air, thereby reducing the energy consumption of the heat pump system, avoiding waste heat, and fully realizing the recovery and utilization of heat gradients, achieving the purpose of energy saving and emission reduction and reducing equipment energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 is a front view of the drying device provided by the present invention;

[0040] Figure 2 is a side view of the drying device provided by the present invention;

[0041] Reference numerals:

[0042] 1: feeding conveyor belt; 2: transport conveyor belt; 21: material dropping end; 22: material receiving end; 3: discharging conveyor belt; 4: drying chamber; 5: brush assembly; 6: partition; 7: second fan; 8: exhaust duct; 9: grille; 10: first fan; 11: air inlet duct; 12: bypass duct; 13: condenser; 14: capillary tube; 15: evaporator; 16: compressor; 17: bypass valve. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Combine the following Figure 1 to Figure 2 The drying apparatus of the present invention is described.

[0049] like Figure 1 to Figure 2 As shown, an embodiment of the present invention provides a drying device, including a drying chamber 4, a material transport device, a material recovery device, a heat pump device, and an air flow power device. Specifically, as Figure 1 As shown, the drying chamber 4 has a chamber for material drying inside, which is used to provide drying space for the material. Its size and shape can be determined according to actual use requirements, for example, it can be designed as a cubic cavity. The material transportation device is connected to the drying chamber 4, which is used to move the material in and out of the chamber and drive the material to move in the chamber, thereby forming dynamic drying, which can solve the problems of uneven drying caused by static drying, affecting the quality of the material, and reducing the drying rate. The material recovery device is arranged in the chamber, which is used to clean and recover the material attached to the material transportation device, so as to avoid the material remaining on the transportation device and reduce the material loss. The heat pump device is used to exchange heat with the external air, heat the air, and generate hot air. The moisture migration mechanism is used to exchange heat with the material in the chamber through the hot air to achieve material drying. The airflow power device is connected to the drying chamber 4, which is used to drive the hot air to flow in the chamber, thereby providing power for the hot air flow, so that the hot air flows through the material to achieve the purpose of drying the material. The airflow power device is also used to discharge the hot air after heat exchange with the material out of the chamber, and the heat pump device is also used to recover the waste heat of the hot air after heat exchange, thereby making full use of the waste heat of the hot air discharged outdoors, reducing the energy consumption of the device, avoiding heat waste, and improving the energy efficiency of the system.

[0050] With such arrangement, the material is moved by the material transport device to form dynamic drying, avoid uneven drying, and improve drying efficiency. The material adhering to the transport device is recycled by the material recovery device to reduce material loss, avoid waste of resources, and effectively improve material utilization. At the same time, the heat pump device also recovers the waste heat of the hot air discharged from the drying chamber 4 to heat the external air, thereby realizing the recycling and reuse of low-grade energy, reducing the energy consumption of the heat pump system, avoiding waste heat waste, and fully realizing the recycling and utilization of heat gradient, thereby achieving the purpose of energy saving and emission reduction, reducing environmental pollution, and reducing equipment energy consumption, solving the problems of high energy consumption, heavy pollution, and large material loss of traditional hot air drying in the prior art.

[0051] In the embodiment of the present invention, the drying chamber 4 is provided with a feed inlet and a discharge outlet which are connected to the chamber. Specifically, Figure 1 As shown, the left and right sides of the drying chamber 4 are respectively provided with a feed port and a discharge port, the feed port is located at the upper end of the left side of the drying chamber 4, and the discharge port is located at the lower end of the right side of the drying chamber 4. Figure 1 For the placement of the drying equipment shown in the figure, the left and right directions in the figure refer to the left and right directions, and the up and down directions in the figure refer to the up and down directions.

[0052] The material transport device includes a feeding conveyor belt 1, a transport conveyor belt 2 and a discharging conveyor belt 3. Specifically, Figure 1 As shown, the feeding conveyor belt 1 is obliquely arranged on the left side of the drying chamber 4 and connected to the feed port. The feeding conveyor belt 1 is used to lift the material into the drying chamber 4 to achieve the feeding effect. The transport conveyor belt 2 is arranged in the drying chamber 4, one end of which is connected to the feed port, and the other end is connected to the discharge port. The transport conveyor belt 2 is used to receive the material transported by the feeding conveyor belt 1, and drive the material to move in the chamber to achieve the movement of the material in the chamber. The discharge conveyor belt 3 is arranged on the right side of the drying chamber 4 and connected to the discharge port. The discharge conveyor belt 3 is used to receive the material transported by the feeding conveyor belt 2, and move the material out of the drying chamber 4 to achieve the output and collection of the finished material, so as to facilitate the subsequent transportation to the storage bin, etc. In this way, a belt transport device is formed, which has a simple structure and is easy to use. The material moves in the chamber at a certain speed to ensure that the material is evenly dried and the drying efficiency is improved.

[0053] Further, in an embodiment of the present invention, if Figure 1 As shown, there are at least two conveyor belts 2, and each conveyor belt 2 is spaced apart along the height direction of the drying chamber 4. The movement directions of two adjacent conveyor belts 2 are opposite, and the material-dropping end 21 of the upper conveyor belt 2 and the material-receiving end 22 of the lower conveyor belt 2 are correspondingly arranged and connected. Figure 1 As shown in the example, there are five conveyor belts 2, and each layer of conveyor belts 2 is arranged in parallel. The first, third, and fifth layers of conveyor belts 2 transport materials from left to right, and the second and fourth layers of conveyor belts 2 transport materials from right to left. In this way, multiple layers of conveyor belts 2 are arranged from top to bottom to form an S-shaped transmission path, extending the movement of the material in the chamber, allowing the material to be fully dried and improving the material drying effect. It should be noted that, in the case of Figure 1 As for the placement position of the drying equipment shown in the figure, the left and right direction in the figure refers to the left and right position, and the up and down direction in the figure refers to the up and down position and the height direction of the drying chamber 4.

[0054] In an optional embodiment of the present invention, the material recovery device includes a brush assembly 5 and a material collection assembly. The brush assembly 5 is in contact with the material conveyor belt 2 and is used to remove materials adhering to the material conveyor belt 2. The material collection assembly is arranged below the material conveyor belt 2 and is used to collect fallen materials. Specifically, Figure 2As shown, the brush assembly 5 includes connected bristles and a brush handle. The brush handle can be fixedly installed in the drying chamber 4 through a steel pipe, and the bristles are close to the lower side of the material conveyor belt 2. The brush assembly 5 is arranged along the width direction of the drying chamber 4, and its number and installation position can be determined according to actual design requirements. With such an arrangement, the material remaining on the conveyor belt can be cleaned by the brush assembly 5, and the brushed and missed materials can be collected by the collection assembly for recycling, saving resources and improving material utilization. It should be noted that, as shown in the figure, Figure 2 As for the placement of the drying equipment shown in the figure, the left-right direction in the figure is the width direction of the drying chamber 4, and the up-down direction in the figure is the up-down position.

[0055] As an optional embodiment of the present invention, Figure 1 As shown, the material collection assembly includes a partition 6, which is installed at the bottom of the drying chamber 4. For example, the partition 6 can be designed in the form of a tray to prevent the material from falling outside the tray. The partition 6 is slidably connected to the drying chamber 4, and the drying chamber 4 is provided with an inlet and outlet for the partition 6 to facilitate the recovery of leaked materials. With such an arrangement, the partition 6 can be cleaned and replaced in time by pulling out the partition 6, which is convenient to use. It should be noted that Figure 1 As for the placement position of the drying equipment shown in the figure, the lower end of the drying chamber 4 in the figure is the bottom of the drying chamber 4.

[0056] In the embodiment of the present invention, Figure 2 As shown, the heat pump device includes a compressor 16, a condenser 13, a throttling assembly and an evaporator 15 which are arranged in sequence and connected end to end to form a refrigerant circulation loop. It should be noted that Figure 2 The direction indicated by the solid arrow is the refrigerant flow direction. Figure 2 The direction indicated by the hollow arrow is the direction of gas flow. Specifically, the throttling component can be a capillary tube 14, or an electronic expansion valve or the like. The condenser 13 includes a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, the first heat exchange channel is located in the refrigerant circulation loop, and the second heat exchange channel is connected to the outside air. The evaporator 15 includes a third heat exchange channel and a fourth heat exchange channel for exchanging heat with each other, the third heat exchange channel is located in the refrigerant circulation loop, and the fourth heat exchange channel is connected to the hot air discharged from the drying chamber 4.

[0057] With such arrangement, the evaporator 15 efficiently recovers the latent heat of phase change of water vapor generated during the drying process, compresses and increases enthalpy through the compressor 16, and uses the condenser 13 as a drying heat source to heat the external fresh air to form hot air, which enters the drying chamber 4 to dry the material. Thus, the heat pump component realizes the recovery and reuse of the waste heat of the hot air, reducing the energy consumption of the heat pump system.

[0058] In a specific embodiment of the present invention, the drying chamber 4 is provided with an air inlet and an air outlet connected to the chamber, specifically, as Figure 2 As shown, the air inlet is located at the bottom of the drying chamber 4, and the air outlet is located at the top of the drying chamber 4. Figure 2 As for the placement of the drying equipment shown in the figure, the upper end of the drying chamber 4 in the figure is the top of the drying chamber 4, and the lower end of the drying chamber 4 in the figure is the bottom of the drying chamber 4. This arrangement is conducive to gas flow, and Figure 1 As shown, the material moves from top to bottom, and the hot air flows from bottom to top, forming reverse convection, which is more conducive to increasing the material drying rate and improving the material drying quality. Figure 1 The direction indicated by the hollow arrow is the gas flow direction.

[0059] like Figure 2 As shown, the airflow power device includes a first fan 10, a second fan 7, and a bypass pipe 12. The first fan 10 is connected to the air inlet, and is connected to the second heat exchange channel of the condenser 13 through the air inlet pipe 11. The second fan 7 is connected to the air outlet, and is connected to the fourth heat exchange channel of the evaporator 15 through the exhaust pipe 8. One end of the bypass pipe 12 is connected to the air outlet, and the other end is connected to the inlet of the second heat exchange channel. Specifically, as Figure 2 As shown, one end of the bypass pipe 12, i.e., its upper end, is connected to the exhaust pipe 8, and its connecting position is between the second fan 7 and the evaporator 15, and the other end of the bypass pipe 12, i.e., its lower end, is connected to the air inlet pipe 11, and its connecting position is between the inlet of the air inlet pipe 11 and the condenser 13.

[0060] During operation, the external fresh air enters the air inlet pipe 11, exchanges heat with the refrigerant in the condenser 13, forms hot air, and is introduced into the drying chamber 4 by the first fan 10. With the cooperation of the second fan 7, the hot air flows through the material to be dried and exchanges heat with it, and is discharged from the exhaust port to the exhaust pipe 8. Then, part of the exhausted hot air returns to the air inlet pipe 11 through the bypass pipe 12, mixes with the external fresh air, and enters the drying chamber 4 through the condenser 13; part of the hot air is discharged into the atmosphere after recovering the waste heat through the evaporator 15.

[0061] With such arrangement, the gas flow rate can be controlled by controlling the first fan 10 and the second fan 7, so as to realize material drying and ensure drying efficiency and drying effect. Part of the hot air discharged from the drying chamber 4 can be mixed with the fresh air through the bypass pipe 12 to preheat the fresh air, thereby reducing the energy consumption of the heat exchange device. At the same time, the evaporator 15 can be used to recover and reuse the waste heat of the hot air, thereby reducing the drying heat load and achieving the purpose of energy saving and emission reduction.

[0062] Furthermore, in the embodiment of the present invention, the airflow power device further includes a bypass valve 17, which is disposed in the bypass pipe 12 and is used to adjust the gas flow in the bypass pipe 12. With such a configuration, the return air flow rate can be adjusted by controlling the opening of the bypass valve 17 according to actual use requirements, so as to adjust the return air and fresh air ratio, realize resource optimization configuration, achieve the best heat exchange effect, and reduce the drying heat load.

[0063] In an optional embodiment of the present invention, the airflow power device further includes a grille 9, which is arranged at the position of the air inlet to prevent the material from being sucked into the air inlet. Specifically, the partition 6 is located below the air inlet, and the grille 9 is installed at the air inlet. The inlet and outlet for the partition 6 and the air inlet can be arranged on the front and rear sides of the drying chamber 4, respectively, which is convenient for arrangement. It should be noted that, as shown in FIG. Figure 2 As for the placement of the drying device shown, the left side in the figure is the front side of the drying chamber 4, and the right side in the figure is the rear side of the drying chamber 4. Such an arrangement can prevent the material from being sucked into the air inlet under negative pressure and blocking the air inlet, thereby ensuring reliable operation of the device.

[0064] As an optional embodiment of the present invention, Figure 1 As shown, there are at least two air inlets, and each air inlet is spaced apart along the length direction of the drying chamber 4. This ensures that air enters uniformly throughout the drying chamber 4, improves drying efficiency, and avoids uneven drying. Specifically, a grille 9 is installed at each air inlet.

[0065] There are at least two exhaust vents, and the exhaust vents are spaced apart along the length of the drying chamber 4. This ensures that rapid air return can be achieved, promotes hot air circulation, and improves the drying rate. Specifically, the air inlets and exhaust vents can be set one by one, and the heat pump device can be set as one, connected to each group of air inlets and exhaust vents; or, the heat pump device can be set as multiple, and each group of air inlets and exhaust vents is connected to a heat pump device, and its specific setting can be determined according to the actual heat exchange demand. It should be noted that, in the case of Figure 1 As for the placement of the drying equipment shown in the figure, the left-right direction in the figure is the length direction of the drying chamber 4.

[0066] In summary, an embodiment of the present invention provides a drying device, including a drying chamber 4, a material transport device, a material recovery device, a heat pump device, and an airflow power device. The drying chamber 4 provides a drying space for the material. The material transport device adopts belt transmission and is connected to the drying chamber 4 to control the entry and exit and movement of the material in the drying chamber 4, thereby realizing the dynamic drying process of the material. The material recovery device is connected to the conveyor belt, and the material adhering to the conveyor belt is cleaned by setting a brush assembly 5, and the residual material is recovered through the partition 6 at the bottom, thereby reducing the material loss in the drying process and realizing the recycling of resources. The airflow power device is connected to the drying chamber 4 to control the flow of hot air and realize the drying of the material. At the same time, the airflow power device is connected to the heat pump device, so that the hot air discharged from the drying chamber 4 can flow through the heat pump device. The heat pump device cooperates with the bypass valve 17 to recycle the waste heat of the hot air, reduce the drying heat load, and achieve the purpose of energy saving and emission reduction.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drying device, characterized in that: include: A drying chamber, which has a chamber inside for drying materials; A material transport device connected to the drying chamber, the material transport device is used to move materials into and out of the chamber and drive the materials to move within the chamber; A material recovery device, disposed in the chamber, for cleaning and recovering materials attached to the material transport device; A heat pump device, used for exchanging heat with external air to generate hot air, and the hot air is used for exchanging heat with the material in the chamber; An airflow power device is connected to the drying chamber, and is used to drive the hot air to flow in the chamber and discharge the hot air after heat exchange out of the chamber, and the heat pump device is also used to recover the waste heat of the hot air after heat exchange.

2. The drying device according to claim 1, characterized in that: The drying chamber is provided with a feed inlet and a discharge outlet communicated with the chamber, and the material transport device comprises: A feeding conveyor belt connected to the feeding port, the feeding conveyor belt is used to feed the material into the drying chamber; A material transport conveyor belt, one end of which is connected to the feed port and the other end of which is connected to the discharge port, the material transport conveyor belt is used to receive the material transported by the feeding conveyor belt and drive the material to move in the chamber; A discharging conveyor belt is connected to the discharging port, and is used to receive the material transported by the transport conveyor belt and move the material out of the drying chamber.

3. The drying device according to claim 2, characterized in that: The material recovery device comprises: A brush assembly is in contact with the material conveyor belt, and the brush assembly is used to remove materials adhering to the material conveyor belt; The material collecting assembly is arranged below the material transporting conveyor belt and is used for collecting fallen materials.

4. The drying device according to claim 3, characterized in that: The aggregate assembly comprises: The partition is arranged at the bottom of the drying chamber, and the partition is slidably connected to the drying chamber. The drying chamber is correspondingly provided with an inlet and outlet for the partition to enter and exit.

5. The drying device according to claim 1, characterized in that: The heat pump device comprises a compressor, a condenser, a throttling assembly and an evaporator which are arranged in sequence and connected end to end to form a refrigerant circulation loop. The condenser includes a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, the first heat exchange channel is located in the refrigerant circulation circuit, and the second heat exchange channel is connected to the external air. The evaporator includes a third heat exchange channel and a fourth heat exchange channel for exchanging heat with each other, the third heat exchange channel is located in the refrigerant circulation circuit, and the fourth heat exchange channel is connected to the hot air discharged from the drying chamber.

6. The drying device according to claim 5, characterized in that: The drying chamber is provided with an air inlet and an air outlet communicated with the chamber, and the air flow power device comprises: a first fan connected to the air inlet, and the first fan is connected to the second heat exchange channel through an air inlet pipe; a second fan connected to the exhaust port, and the second fan is connected to the fourth heat exchange channel through an exhaust pipe; A bypass pipe, one end of which is connected to the exhaust port, and the other end of which is connected to the inlet of the second heat exchange channel.

7. The drying device according to claim 6, characterized in that: The airflow power device also includes: A bypass valve is arranged in the bypass pipe, and the bypass valve is used to adjust the gas flow in the bypass pipe.

8. The drying device according to claim 6, characterized in that: The airflow power device also includes: A grille is arranged at the position of the air inlet, and the grille is used to prevent materials from being sucked into the air inlet.

9. The drying device according to claim 6, characterized in that: The number of the air inlets is at least two, and the air inlets are spaced apart along the length direction of the drying chamber; and / or, The number of the exhaust ports is at least two, and the exhaust ports are spaced apart along the length direction of the drying chamber.

10. The drying device according to claim 2, characterized in that: There are at least two conveyor belts, which are spaced apart along the height direction of the drying chamber. The movement directions of two adjacent conveyor belts are opposite. The blanking end of the upper conveyor belt and the receiving end of the lower conveyor belt are correspondingly arranged and connected.

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