Novel solar electric heat energy storage efficient roller drying system

Abstract

The invention relates to the technical field of material drying, in particular to a novel solar electric heat energy storage efficient roller drying system. The novel solar electric heat energy storage efficient roller drying system comprises a base, a feeding groove is fixed to the base through a support, and a solar PV panel is arranged on the base through a supporting structure; the solid-state electric heating energy storage heat exchanger, the feeding groove and the drying roller are sequentially communicated in the horizontal direction to form a fresh air and material circulation channel, and the first carrier roller driving equipment is in transmission connection with the drying roller to drive the drying roller to rotate. The feeding device is communicated with the feeding bin in a matched mode, and the feeding bin is arranged above the drying roller and supplies materials corresponding to the feeding position of the drying roller. A cleaning assembly, waste heat recovery equipment and fresh air preheating equipment can be further arranged, all functional parts are assembled according to the adaptive relation, and the solar PV panel and the solid-state electric heating energy storage heat exchanger are electrically connected with the PLC. The problem that traditional electric heating wastes energy is solved.

Description

Technical Field

[0001] This invention relates to the technical field of material drying, and specifically to a novel solar-electric thermal energy storage high-efficiency drum drying system. Background Technology

[0002] In the prior art, hot airflow is often used to dry materials. The prior art of material drying has been disclosed in the Chinese patent database, such as the material drying device disclosed in announcement number CN108007119B, and another example is a material dryer disclosed in announcement number CN109425203A.

[0003] However, in the aforementioned existing technologies (CN108007119B, CN109425203A), the heat source for heating the airflow mostly relies on traditional electric heaters for electric heating, which results in significant energy waste. To address the energy waste caused by traditional electric heating, there is an urgent need to design a drying system that can utilize solar energy to dry materials. Solar drying is essentially a process combining heat and mass transfer. Simply put, it uses solar energy to directly or indirectly heat materials, causing the moisture inside the materials to gain energy and migrate to the surface, where it is carried away by the flowing air, thus achieving dehydration. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a novel solar electric thermal energy storage high-efficiency drum drying system to solve the problem of energy waste caused by traditional electric heating.

[0005] This invention discloses a novel high-efficiency solar-electric thermal energy storage drum drying system, comprising a base, a feeding trough fixedly connected to the base via a support, and a solar PV panel mounted on the base plane via a support structure; a solid-state electric heating energy storage heat exchanger, the feeding trough, and the drying drum are sequentially connected from left to right in a horizontal direction to form a continuous air and material flow path, the air outlet of the solid-state electric heating energy storage heat exchanger is connected to the air inlet of the feeding trough, and the discharge end of the feeding trough is rotatably connected to one end of the drying drum; a first idler roller drive device is connected to the drying drum to drive the drying drum to rotate around its own axis; the discharge end of the feeding device is connected to the inlet end of the feeding hopper, the feeding hopper is located above the drying drum and the discharge end corresponds to the feeding position of the drying drum to transport the wet material to be dried; the solar PV panel and the solid-state electric heating energy storage heat exchanger are both electrically connected to a PLC.

[0006] Specifically, a solar PV panel includes a photovoltaic panel and a support frame. The photovoltaic panel is formed by splicing and fixing multiple unit photovoltaic panels together to form a complete photovoltaic panel body. The support frame includes a horizontal crossbar, a vertical support column and a base. The horizontal crossbar is fixed to the photovoltaic panel through a fixing connector. The upper end of the vertical support column is fixedly connected to the horizontal crossbar, and the lower end of the vertical support column is stably connected to the base.

[0007] Specifically, the first idler roller drive device includes a gear ring, which is annular in structure and coaxially fixedly installed on the outer wall area of ​​the drying drum, forming an integrated rotating component with the drying drum; the gear is concentrically fixedly connected to the end of the output shaft of the servo motor; the gear and the gear ring mesh with each other to form a gear transmission pair to realize the power transmission from the servo motor to the drying drum; the bottom of the servo motor is fixedly connected to the base.

[0008] Furthermore, the present invention also includes a cleaning component installed on the solar PV panel for cleaning contaminants on the surface of the solar PV panel.

[0009] More specifically, the cleaning components include a support arm, which is fixedly installed on the top area of ​​the solar PV panel; a sliding seat and the support arm are in sliding engagement, with a protrusion at the bottom of the sliding seat sliding through a long groove on the support arm, allowing the sliding seat to slide back and forth along the length of the support arm; a scraper is fixedly mounted on the sliding seat, with its working end face contacting and fitting the surface of the solar PV panel to complete the cleaning action when the sliding seat moves; a protrusion at the bottom of the sliding seat is fixedly connected to a transmission belt, with both ends of the transmission belt being connected to a pulley and the output shaft of a servo motor, respectively, and both the pulley and the servo motor are fixedly mounted on the support arm.

[0010] In an optimized version, the present invention also includes a waste heat recovery device; the waste heat recovery device is connected to the outlet of the drying drum and is used to recover the exhaust gas discharged from the drying drum, and to use the heat of the recovered exhaust gas to preheat the ambient temperature fresh air before it enters the drying drum.

[0011] More specifically, the waste heat recovery equipment includes a fresh air outer cavity; the fresh air outer cavity is integrally formed on the outer wall of the exhaust gas inner cavity, and the two together constitute the main chamber structure of the waste heat recovery equipment, with the fresh air outer cavity fixed on the base; the fresh air outer cavity has an air inlet and an air outlet, the air outlet of the fresh air outer cavity is connected to one end of the fresh air duct, and the other end of the fresh air duct is connected to the air inlet of the solid-state electric heating energy storage heat exchanger; the outer edge of the air inlet of the exhaust gas inner cavity is rotatably connected to the drying drum, and the two internal chambers are connected; the gas collection chamber is set inside the exhaust gas inner cavity and is fixedly connected to the exhaust gas inner cavity through finned heat exchange tubes; the screw feeder is assembled on the bottom side of the fresh air outer cavity, and the outlet of the exhaust gas inner cavity is used to receive the material discharged from the drying drum; the gas collection chamber is connected to the chamber of the drying drum to receive the exhaust gas.

[0012] The optimization also includes a fresh air preheating device; the fresh air preheating device is installed on the outer edge of the air inlet of the fresh air cavity of the waste heat recovery equipment, and is used to preheat the fresh air before it enters the waste heat recovery equipment.

[0013] More specifically, the fresh air preheating equipment includes a guide pipe; the guide pipe is concentrically fitted inside the turning cylinder, fixedly connected and communicating with the exhaust gas cavity, providing a flow channel for the exhaust gas discharged from the drying drum; the turning cylinder is rotatably connected and communicating with the fresh air cavity, providing a closed chamber for heat exchange between the material and the fresh air to be preheated; the turning teeth are arranged in a ring array on the inner wall of the turning cylinder, turning the material as the turning cylinder rotates; the inner heat exchange fins are concentrically set on the inner wall of the guide pipe, and the outer heat exchange fins are concentrically set on the outer wall of the guide pipe, together transferring the waste heat of the exhaust gas to the fresh air inside the turning cylinder; the second idler roller drive device is mounted on the turning cylinder, driving the turning cylinder to rotate continuously; the guide hopper is fixed on the side of the base, directly below the discharge port of the turning cylinder, used to receive the cooled material discharged from the turning cylinder; the discharge belt conveyor is placed below the guide hopper, transporting the material to a designated collection point; the induced draft fan is connected to the end of the guide pipe, and the exhaust fan outlet is fixedly connected to the exhaust gas discharge pipe.

[0014] The beneficial effects of this invention are as follows: This invention primarily addresses the energy waste associated with traditional electric heating. It not only utilizes solar energy to dry wet materials but also stores solar thermal energy, effectively reducing energy losses from traditional electric heating. Firstly, solar PV panels convert light energy into electrical energy, which is then stored using a solid-state electric thermal energy storage heat exchanger made of high-specific-heat-capacity materials such as magnesium oxide bricks. This allows for simultaneous heat storage and exchange, enabling continuous drying operations even in the absence of sunlight, maximizing the use of clean energy and reducing reliance on traditional electricity. Secondly, the system integrates a waste heat recovery unit and a fresh air preheater. Through finned structures and other design features, heat is recovered from the drying exhaust gas, and the fresh air is preheated, significantly improving energy efficiency and further reducing energy waste. Meanwhile, the drying drum rotates under the drive of the first idler roller, forming a uniform material curtain, increasing the contact area with the hot dry airflow, improving drying efficiency and uniformity, and reducing material sticking to the wall. In addition, the PLC intelligent control system adjusts the power generation status of the solar PV panel and the heating power of the energy storage heat exchanger in real time, and can switch between solar power and mains power supply to ensure uninterrupted and stable operation of the system. While achieving energy saving and consumption reduction, it also takes into account the drying effect and production continuity. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the novel solar electrothermal energy storage high-efficiency drum drying system of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the solar PV panel of the present invention.

[0017] Figure 3 This is a schematic diagram of the installation structure of the first idler roller drive device of the present invention.

[0018] Figure 4This is a schematic diagram of the installation structure of the cleaning component of the present invention.

[0019] Figure 5 This is a partial three-dimensional structural diagram of the cleaning component of the present invention.

[0020] Figure 6 This is a schematic diagram of the installation structure of the waste heat recovery equipment of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of the waste heat recovery equipment of the present invention.

[0022] Figure 8 This is a cross-sectional structural diagram of the waste heat recovery equipment of the present invention.

[0023] Figure 9 This is a schematic diagram of the installation structure of the fresh air preheating device of the present invention.

[0024] Figure 10 This is a cross-sectional structural diagram of the fresh air preheating device of the present invention.

[0025] Figure 11 This is a schematic diagram of the installation structure of the vibrating material assembly of the present invention.

[0026] Figure 12 This is an enlarged schematic diagram of the installation structure of the vibrating material assembly of the present invention.

[0027] Figure 13 This is a schematic diagram of the installation structure of the anti-deviation component of the present invention.

[0028] Figure 14 This is a three-dimensional structural diagram of the anti-deviation component of the present invention.

[0029] Figure 15 This is a schematic diagram of the installation structure of the automatic unloading mechanism of the present invention.

[0030] Figure 16 This is a schematic diagram of the installation structure of the automatic material removal mechanism corresponding to the left blocking rocker arm of the present invention.

[0031] Figure 17 This is a three-dimensional structural diagram of the automatic unloading mechanism of the present invention.

[0032] Figure 18 This is a motion diagram of the first stage of the automatic material removal mechanism on the left blocking rocker side of the present invention.

[0033] Figure 19 This represents the second stage of the automatic material removal mechanism on the left blocking rocker side of the present invention.

[0034] In the diagram, 1. Base; 2. Feed chute; 3. Solar PV panel; 4. Solid-state electric heating energy storage heat exchanger; 5. Drying drum; 6. Gear ring; 7. Gear; 8. Servo motor; 9. Output shaft; 10. Feeding equipment; 11. Feeding bin; 12. Photovoltaic panel; 13. Bracket; 14. Support arm; 15. Sliding seat; 16. Scraper; 17. Drive belt; 18. Pulley; 19. Servo motor; 20. Long trough; 21. Fresh air outer cavity; 22. Exhaust gas inner cavity; 23. Fresh air duct; 24. Gas collection chamber; 25. Finned heat exchange tube; 26. Screw feeder; 27. Discharge port; 28. Guide pipe; 29. ​​Tilting cylinder; 30. Tilting and throwing teeth; 31. Internal heat exchange fins; 32. External... 33. Heat exchange fins; 34. Second idler roller drive device; 35. Guide hopper; 36. Discharge belt conveyor; 37. Exhaust fan; 38. Exhaust gas exhaust pipe; 39. Guide column; 40. Spring body; 41. Suspension bracket; 42. Vibration motor; 43. Eccentric wheel; 44. Eccentric shaft; 45. Fixed seat; 46. Mounting seat; 47. Left blocking rocker arm; 48. Right blocking rocker arm; 49. Centered roller; 50. Left roller; 51. Right roller; 52. Gear plate; 53. Guide table; 54. Slide table; 55. Pin; 56. Slope plate; 57. Telescopic spring; 58. Gear plate; 59. Slide groove; 60. Flip plate; 61. Wedge block; 62. Protruding rib; 63. Buffer unit; 64. Collision plate. Detailed Implementation

[0035] To clearly understand the technical solution of this application, the novel solar electrothermal energy storage high-efficiency drum drying system provided by this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0036] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two.

[0037] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "one embodiment," "some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0038] Example 1: This example provides a novel high-efficiency drum drying system with solar electrothermal energy storage, referenced... Figure 1 The diagram shows a three-dimensional structural schematic of a novel high-efficiency solar electric thermal energy storage drum drying system. As can be seen, the drying system includes a base 1, which serves as the supporting foundation for the entire system. A feed trough 2 is fixedly connected to the base 1 via supports at its bottom, ensuring stable support. A solar PV panel 3 is mounted on the planar area of ​​the base 1 via its bottom support structure. A solid-state electric heating energy storage heat exchanger 4, the feed trough 2, and the drying drum 5 are connected horizontally from left to right, forming a continuous flow path for fresh air and materials (the solid-state electric heating energy storage heat exchanger 4 can be of the YDGGC type used in existing technology). The air outlet of the solid-state electric heating energy storage heat exchanger 4 is connected to the air inlet of the feed trough 2. The discharge end of the feed trough 2 is rotatably connected to one end of the drying drum 5, allowing the drying drum 5 to rotate relative to the feed trough 2 around its own axis. The first idler roller drive is connected to the drying drum 5 and drives the drying drum 5 to rotate around its own axis. During the rotation of the drying drum 5, the material it carries is turned over, forming a uniform material curtain, increasing the contact area with the heating fresh air to improve drying efficiency; at the same time, it avoids material accumulation, improves drying uniformity, and reduces material sticking to the wall. The discharge end of the feeding device 10 is connected to the inlet end of the feeding bin 11 (the feeding device 10 can be the existing TD75 type general fixed belt conveyor, which will not be described in detail here). The feeding bin 11 is located in the area above the drying drum 5, and the discharge end of the feeding bin 11 corresponds to the inlet position of the drying drum 5, so as to convey the wet material to be dried into the drying drum 5. The solid-state electric heating energy storage heat exchanger 4 and the solar PV panel 3 are both electrically connected to an external PLC (the PLC can be an existing product and is not shown in the figure). The PLC coordinates the operation status of the solid-state electric heating energy storage heat exchanger 4 and the solar PV panel 3.

[0039] The solid-state electric heating energy storage heat exchanger 4 is internally designed with an electric heating module. The upper two sides are respectively designed with air inlets and air outlets. The lower part uses magnesia bricks (or refractory bricks and other high specific heat capacity solid energy storage materials) for sensible heat storage. The high temperature provided by the electric heating module and magnesia bricks drives the heat pipe heat exchanger. The heat is transferred to the upper condensing end through the heat pipe heat exchanger, thereby achieving the temperature required for drying operation and realizing simultaneous heat storage and heat exchange. This invention can achieve high-energy-consuming drying operation at extremely low cost under light conditions, and can also perform drying operation for a certain period of time under no-light conditions.

[0040] The material of the feeding hopper 11 should primarily consider hygiene and corrosion resistance; therefore, food-grade stainless steel can be used. The parts of the inner wall of the feeding hopper 11 that come into contact with the material must be mirror-polished to facilitate thorough cleaning and disinfection, prevent bacterial growth, and minimize frictional resistance to promote material flow. The entire feeding hopper 11 can adopt a modular design, with a maintenance and cleaning port with a sealed cover at the top, and a visual level gauge or a more advanced ultrasonic level sensor on the side to monitor the material level in real time (this modular design is not shown in the figure).

[0041] The core function of the feed trough 2 is to receive materials from the upstream feed bin 11 and transport them smoothly and unimpeded to the conveying equipment inside the drying chamber in a controllable and guideable manner. For damp, easily caking agricultural products (such as fruit pomace), the primary design objective of the feed trough 2 is to prevent clogging; for grains with better flowability, the focus is on guiding their even distribution to prevent accumulation; for most agricultural materials, an inclination angle between 45° and 60° can be used. To accurately guide the material flow to the designated position on the drying drum 5 and ensure uniform distribution, an adjustable distribution gate or "ram's horn" type distributor can be used at the outlet of the feed trough 2. The thickness and distribution of the material layer can be precisely controlled by manual or automatic fine-tuning, thus achieving uniform drying; a shut-off door (such as an electric valve) can be installed at the bottom of the feed bin 11. For highly viscous materials, a high-frequency, low-amplitude pneumatic or electromagnetic vibrator can be installed on the outer wall of the feed trough 2. This micro-vibration effectively breaks the adhesion between the material and the trough wall, maintaining stable material flow. Alternatively, food-grade plastic or stainless steel sliding plates can be embedded in key areas inside the feed trough 2, or a low-pressure pulse air anti-bridging system can be designed to reduce friction through gas lubrication. An overflow device can be installed on the side of the feed trough 2. When the drying drum 5 needs to be temporarily stopped due to overfilling or malfunction, the material in the feed trough 2 can be safely guided to a spare container, avoiding production chaos and material loss. Considering hygiene and corrosion resistance, 304 stainless steel can be selected for the feed trough 2. However, when processing acidic materials or in high-salt coastal environments, choosing the more corrosion-resistant 316 stainless steel can significantly extend the equipment's lifespan. All inner surfaces of the feed trough 2, especially the weld seams, can be thoroughly ground and mirror-polished to create an ultra-smooth surface with an Ra value of less than 0.8 micrometers. This not only greatly reduces frictional resistance and material residue but also facilitates rapid and thorough cleaning and disinfection, meeting stringent food safety production standards. The interface at the top of the feed trough 2 can be flexibly connected and sealed to the feed hopper outlet to prevent dust escape and cold air infiltration. A non-contact material flow sensor can be integrated inside the feed trough 2 to monitor the material feeding status in real time and feed the signal back to the central control system (PLC), which then adjusts the vibrator or shut-off door of the feed hopper 11 to achieve intelligent start-stop. The exterior of the feed trough 2 can also be insulated, covered with polyurethane, aerogel, or other thermal insulation materials to reduce heat loss through the metal walls.

[0042] To achieve efficient and rapid material drying, circumferentially distributed lifting plates (not shown in the diagram) can be installed inside the drying drum 5. As the drum rotates, these plates lift the material from the bottom, scattering it at a certain height to form a uniformly distributed material curtain. This significantly increases the contact area between the material and the hot air passing through the drum, thereby substantially improving heat and mass transfer efficiency. The lifting plates can be simple straight plates, or more efficient fan-shaped or honeycomb designs. For easily adhered materials, fan-shaped lifting plates with clean cutting edges help prevent material accumulation. Since the drying drum 5 is a rotating component, both ends of the drum need to be sealed to prevent energy loss due to leakage of heated fresh air containing water vapor, and to prevent the infiltration of cold air that would reduce drying efficiency (the sealing process directly uses existing technologies such as mechanical seals and labyrinth seals, which will not be elaborated here). Considering the heat preservation of the drying drum 5, the body of the drying drum 5 can be made of two layers of steel plates rolled together, with high-temperature resistant aluminum silicate cotton or rock wool and other high-performance heat preservation materials filling the middle to form a sandwich structure, which can minimize heat loss from the drum wall and concentrate heat energy on the evaporation process of the material.

[0043] For details, please refer to Figure 2 The diagram shows a three-dimensional structural schematic of the solar PV panel 3. As can be seen, the solar PV panel 3 consists of two parts: a photovoltaic panel 12 and a support frame 13. The photovoltaic panel 12 is formed by splicing together multiple unit photovoltaic panels 12, which are fixedly connected to each other to form the complete photovoltaic panel 12 body. The support frame 13 includes a horizontal crossbar, a vertical support column, and a base. The horizontal crossbar is fixed to the back area of ​​the photovoltaic panel 12 via multiple sets of sheet-like fixing connectors, achieving stable support of the photovoltaic panel 12 by the support frame 13. The upper end of the vertical support column is fixedly connected to the middle connection node of the horizontal crossbar, and the lower end of the vertical support column is firmly connected to the bottom disc-shaped base. The base serves as a supporting foundation, bearing the overall weight of the photovoltaic panel 12 and the support frame 13, ensuring the stability of the device.

[0044] For details, please refer to Figure 3 The diagram shows the installation structure of the first idler roller drive device. As can be seen, the first idler roller drive device includes a gear ring 6, which is annular in structure and coaxially fixedly installed on the outer wall of the drying drum 5, forming an integrated rotating component. A gear 7 is mounted on the end of the output shaft 9 of the servo motor 8 and is fixedly connected to it. When the servo motor 8 is running, it can directly drive the gear 7 to rotate synchronously. The gear 7 meshes with the gear ring 6, forming a gear transmission pair, thereby transmitting power from the servo motor 8 to the drying drum 5. The bottom of the servo motor 8 is fixedly connected to the base 1, providing stable support for the servo motor 8 and ensuring the stability of the meshing transmission between the gear 7 and the gear ring 6.

[0045] The workflow of this invention is roughly as follows: Step 1: The PLC first coordinates the operation of the solar PV panel 3 and the YDGGC type solid-state electric heating energy storage heat exchanger 4. The solar PV panel 3 converts light energy into electrical energy, and the solid-state electric heating energy storage heat exchanger 4 starts heating preparation. At the same time, the servo motor 8 of the first idler roller drive device starts, and drives the gear 7 to rotate through the output shaft 9. The gear 7 meshes with the toothed ring 6 on the outer wall of the drying drum 5, driving the drying drum 5 to rotate stably around its own axis.

[0046] Step 2: After preheating is completed, the TD75 general-purpose fixed belt conveyor transports the wet material to be dried to the feeding bin 11. The feeding bin 11 feeds the material evenly into the drying drum 5 through the discharge end of the corresponding feeding position of the drying drum 5.

[0047] Step 3: Fresh air enters from the inlet of the solid-state electric heating energy storage heat exchanger 4, and after being heated, it forms a dry hot airflow, which flows through the feed trough 2 and the drying drum 5 in sequence to form a continuous hot airflow path. After the material enters the feed trough 2, it comes into initial contact with the dry hot airflow in the feed trough 2 to achieve preheating and drying, and then moves to the other end with the rotation of the drying drum 5.

[0048] Step 4: During the rotation of the drying drum 5, the internal material is continuously turned over to form a uniform material curtain, which greatly increases the contact area with the hot dry airflow. This not only improves the heat and mass transfer efficiency and accelerates the evaporation of moisture, but also avoids material accumulation, ensuring drying uniformity and reducing material sticking to the wall. Throughout the process, the PLC controls the power generation status of the solar PV panel 3 and the heating power of the solid-state electric heating energy storage heat exchanger 4 in real time to ensure efficient energy utilization and stable drying effect. Finally, the dried material is discharged from the discharge end of the drying drum 5.

[0049] This invention primarily addresses the energy waste associated with traditional electric heating. It not only utilizes solar energy to dry wet materials but also stores solar thermal energy, effectively reducing energy losses from traditional electric heating. Firstly, solar PV panels 3 convert light energy into electrical energy, which is then stored using a solid-state electric thermal energy storage heat exchanger made of high-specific-heat-capacity materials such as magnesium oxide bricks. This allows for simultaneous heat storage and exchange, enabling continuous drying operations even in the absence of sunlight, maximizing the use of clean energy and reducing reliance on traditional electricity. Secondly, the system integrates a waste heat recovery unit and a fresh air preheater. Through finned structures and other design features, heat is recovered from the drying exhaust gas, and the fresh air is preheated, significantly improving energy efficiency and further reducing energy waste. Meanwhile, the drying drum 5 rotates under the drive of the first idler roller, causing the material to form a uniform curtain, increasing the contact area with the hot dry airflow, improving drying efficiency and uniformity, and reducing material sticking to the wall. In addition, the PLC intelligent control system adjusts the power generation status of the solar PV panel 3 and the heating power of the energy storage heat exchanger in real time, and can switch between solar power and mains power supply to ensure uninterrupted and stable operation of the system. While achieving energy saving and consumption reduction, it also takes into account the drying effect and production continuity.

[0050] Solar PV panels 3 are exposed to natural conditions for extended periods, leading to the accumulation of various contaminants (such as dust) on their surface. These contaminants adhere to the surface of the solar PV panels 3, significantly reducing sunlight transmission efficiency and causing a substantial decrease in photoelectric conversion efficiency. Furthermore, some corrosive contaminants, if left untreated, can erode the anti-reflective coating on the surface of the solar PV panels 3, damaging the structural integrity of the panel and shortening its lifespan. Manual cleaning is not only labor-intensive and inefficient, but also poses safety hazards due to working at heights and incurs high maintenance costs. Therefore, there is an urgent need to design a cleaning component, referencing... Figure 4 The diagram shows the installation structure of the cleaning component, which is directly installed on the solar PV panel 3 to achieve efficient and automatic cleaning of contaminants on the surface of the solar PV panel 3, thereby solving the aforementioned technical problems. The specific structure of the cleaning component is as follows.

[0051] refer to Figure 5The diagram shows a partial three-dimensional structural schematic of the cleaning assembly. As can be seen, the cleaning assembly includes a support arm 14, which is fixedly installed on the top area of ​​the solar PV panel 3, providing a foundation for the installation and movement of the entire cleaning assembly. A sliding seat 15 is slidably fitted to the support arm 14. Specifically, the sliding seat 15 slides through a long slot 20 on the support arm 14 via a protrusion at its bottom, allowing the sliding seat 15 to slide back and forth along the length of the support arm 14. A scraper 16 is fixedly mounted on the sliding seat 15. The working end face of 16 is in contact with the surface of the solar PV panel 3 to ensure that the scraper 16 can adhere to the surface of the PV panel to complete the cleaning action when the sliding seat 15 moves; the protrusion at the bottom of the sliding seat 15 is fixedly connected to the transmission belt 17, and the two ends of the transmission belt 17 are respectively connected to the pulley 18 and the output shaft 9 of the servo motor 19. The pulley 18 and the servo motor 19 are both fixedly installed on the support arm 14, forming a power transmission path of "servo motor 19, transmission belt 17, sliding seat 15" to realize the reciprocating drive of the sliding seat 15 and the scraper 16.

[0052] During the drying process, after the heated fresh air in the drying drum 5 comes into full contact with the material, it carries a large amount of water vapor, dust, and unutilized heat, forming exhaust gas. If this exhaust gas is directly discharged to the outside, it will result in a significant loss of heat energy, causing serious energy waste and increasing production energy costs. Therefore, this invention further designs a waste heat recovery device, referring to... Figure 6 The diagram shows the installation structure of a waste heat recovery device, which is connected to the outlet of the drying drum 5. Since the fresh air entering the drying drum 5 is typically at room temperature, this waste heat recovery device efficiently recovers the exhaust gas discharged from the drying drum 5. Simultaneously, it utilizes the recovered exhaust gas heat to preheat the room-temperature fresh air before it enters the drying drum 5, thus solving the aforementioned technical problems of energy waste, low drying efficiency, and excessive energy consumption. The specific structure of the waste heat recovery device is as follows.

[0053] refer to Figure 6-8 ,in, Figure 7 The diagram shown is a three-dimensional structural schematic of a waste heat recovery device. Figure 8The diagram shows a cross-sectional view of the waste heat recovery equipment. As can be seen, the equipment includes a fresh air outer cavity 21, which is integrally formed on the outer wall of the exhaust gas inner cavity 22. The fresh air outer cavity 21 and the exhaust gas inner cavity 22 together constitute the main chamber structure of the waste heat recovery equipment. The fresh air outer cavity 21 is fixed to the base 1. The fresh air outer cavity 21 has an air inlet and an air outlet. The air outlet of the fresh air outer cavity 21 is connected to one end of a fresh air duct 23, and the other end of the fresh air duct 23 is connected to the air inlet of the solid-state electric heating energy storage heat exchanger 4. The outer edge of the air inlet of the exhaust gas inner cavity 22 is rotatably connected to the drying drum 5, and their internal chambers are interconnected. The exhaust gas and materials discharged from the drying drum 5 can enter the exhaust gas inner cavity 22; the gas collecting chamber 24 is set inside the exhaust gas inner cavity 22, and the gas collecting chamber 24 is fixedly connected to the exhaust gas inner cavity 22 through the finned heat exchange tube 25; the screw feeder 26 is assembled on the bottom side of the fresh air outer cavity 21, and the feeding end of the screw feeder 26 corresponds to the discharge port 27 opened on the exhaust gas inner cavity 22. The discharge port 27 of the exhaust gas inner cavity 22 is used to receive the materials discharged from the drying drum 5; at the same time, the gas collecting chamber 24 is connected to the chamber of the drying drum 5 to receive the exhaust gas discharged from the drying drum 5, and the fresh air flowing into the fresh air outer cavity 21 is preheated by heat conduction through the finned heat exchange tube 25.

[0054] To further preheat the fresh air before it enters the waste heat recovery equipment, thereby increasing the initial temperature of the fresh air entering the equipment and enhancing the overall preheating effect, and further reducing the energy consumption of this invention; therefore, referring to Figure 9 The figure shows a schematic diagram of the installation structure of the fresh air preheating device. As can be seen from the figure, the present invention further sets the fresh air preheating device on the outer edge of the air inlet of the fresh air outer cavity 21.

[0055] Combination Figure 9-10 ,in, Figure 10The diagram shows a cross-sectional view of the fresh air preheating equipment. As can be seen from the diagram, the fresh air preheating equipment includes a guide pipe 28, which is concentrically fitted inside the material turning cylinder 29. The guide pipe 28 is fixedly connected to and communicates with the exhaust gas inner cavity 22, providing a flow channel for the exhaust gas discharged from the drying drum 5. The material turning cylinder 29 is rotatably connected to and communicates with the fresh air outer cavity 21, providing a closed chamber for heat exchange between the material and the fresh air to be preheated. The turning teeth 30 are arranged in a ring array on the inner wall of the turning cylinder 29. When the turning cylinder 29 rotates, it can turn the material, so that the material can fully contact the fresh air and improve the heat exchange uniformity. The inner heat exchange fins 31 are concentrically arranged on the inner wall of the guide pipe 28, and the outer heat exchange fins 32 are concentrically arranged on the outer wall of the guide pipe 28. The inner heat exchange fins 31 increase the heat exchange area between the exhaust gas and the guide pipe 28, and the outer heat exchange fins 32 enhance the heat exchange between the guide pipe 28 and the fresh air. Together, they transfer the waste heat of the exhaust gas to the fresh air in the turning cylinder 29, so as to achieve preheating of the fresh air and cooling of the material. The second idler roller drive device 33 is mounted on the turning cylinder 29, driving the turning cylinder 29 to rotate continuously, which in turn drives the turning teeth 30 to stably turn the material, ensuring the continuity of the fresh air preheating and material cooling process (the structure of the second idler roller drive device 33 is exactly the same as that of the first idler roller drive device, the only difference being that the second idler roller drive device 33 is used to drive the turning cylinder 29 to turn over, which will not be described in detail here). The guide bin 34 is fixed to the side of the base 1, directly below the discharge port 27 of the turning cylinder 29. The guide bin 34 is used to receive the cooled material discharged from the turning cylinder 29 to prevent the material from scattering; the discharge belt conveyor 35 is placed below the guide bin 34 to smoothly transport the material to the designated collection point, reducing mechanical damage to the material and dust escape. The induced draft fan 36 is connected to the end of the guide pipe 28 to provide power for the flow of exhaust gas in the guide pipe 28, accelerating the exhaust gas discharge and heat transfer; the air outlet of the induced draft fan 36 is fixedly connected to the exhaust gas emission pipe 37 to guide the low-temperature exhaust gas that has completed heat exchange to the compliant emission location, avoiding environmental thermal pollution.

[0056] Based on the above connections, the working principle of the combined waste heat recovery equipment and fresh air preheating equipment is as follows: Step 1: After the drying drum 5 completes drying, the exhaust gas carrying residual heat and the dried material enter the exhaust gas chamber 22 of the waste heat recovery equipment together. The exhaust gas flows into the gas collection chamber 24 in the exhaust gas chamber 22 (the exhaust gas flows into the gas collection chamber 24 in the direction B) for temporary storage, while the material is collected in the direction a to the outlet 27 of the exhaust gas chamber 22.

[0057] Step 2: The exhaust gas in the gas collection chamber 24 enters the finned heat exchange tube 25. The waste heat of the exhaust gas is transferred to the fresh air outer chamber 21 of the waste heat recovery equipment through the finned structure, and the fresh air to be preheated in the fresh air outer chamber 21 (fresh air flows into the fresh air outer chamber 21 along direction A) is preheated.

[0058] Step 3: The exhaust gas that has completed the initial heat exchange continues to flow into the guide pipe 28 of the fresh air preheating equipment. The inner heat exchange fins 31 on the inner wall of the guide pipe 28 enhance the heat conduction of the exhaust gas, while the outer heat exchange fins 32 on the outer wall transfer the heat to the turning cylinder 29 chamber outside the guide pipe 28.

[0059] Step 4: The fresh air to be preheated first enters the turning cylinder 29 chamber of the fresh air preheating equipment. During the rotation of the turning cylinder 29 driven by the second roller drive device 33, the turning and throwing teeth 30 continuously turn the material, so that the fresh air can fully contact the "material carrying residual heat" and the "external heat exchange fins 32 of the guide pipe 28" at the same time, so as to achieve the preheating of the fresh air.

[0060] Step 5: The preheated fresh air enters the fresh air outer cavity 21 of the waste heat recovery equipment, and exchanges heat with the exhaust gas again through the finned heat exchange tube 25 to further increase the temperature of the fresh air. Then, it is transported to the solid-state electric heating energy storage heat exchanger 4 through the fresh air duct 23.

[0061] Step 5: The material from the outlet 27 of the exhaust gas cavity 22 enters the turning cylinder 29 of the fresh air preheating equipment. As the turning cylinder 29 rotates, it is turned over by the turning and throwing teeth 30. After exchanging heat with the fresh air and cooling down, it falls from the outlet 27 of the turning cylinder 29 into the guide hopper 34, and is then smoothly transported to the designated collection point by the discharge belt conveyor 35.

[0062] Step 6: The low-temperature exhaust gas that has completed heat transfer in the guide pipe 28 is guided to a compliant location and discharged through the exhaust gas emission pipe 37 under the power drive of the induced draft fan 36, so as to avoid environmental thermal pollution.

[0063] In Example 2, when feeding materials using the feeding hopper 11 provided in Example 1, for agricultural by-products such as fruit pomace that are damp and prone to clumping, the materials are prone to bridging and clumping at the discharge end of the feeding hopper 11 due to their own stickiness or the squeezing pressure between particles, which can lead to material blockage. Material blockage not only disrupts the continuity of material conveying and reduces the overall operating efficiency of the drying system, but may also cause abnormal pressure in the feed trough 2 due to material accumulation, increasing the frequency of equipment shutdown for maintenance and maintenance costs.

[0064] To solve the above-mentioned technical problems, this embodiment further adds a vibrating material assembly to the original structure of the feeding bin 11 in Embodiment 1, referring to... Figure 11 The diagram shows the installation structure of the vibrating feed assembly. As can be seen from the diagram, the vibrating feed assembly is installed on the feeding hopper 11. It uses vibration to break up material bridging and loosen agglomerated materials, ensuring the smoothness and stability of the feeding process in the feeding hopper 11, thereby optimizing the operational reliability of the drying system. The specific structure of the vibrating feed assembly is as follows.

[0065] refer to Figure 12The diagram shows an enlarged view of the installation structure of the vibrating feed assembly. As can be seen, the assembly includes guide posts 38, two of which are fixedly installed side-by-side on the outer wall of the feed hopper 11, serving as a support and guide structure for the assembly. A suspension bracket 40 is slidably fitted onto the outer side of the two guide posts 38, allowing the bracket 40 to slide back and forth along the axial direction of the guide posts 38. Simultaneously, springs 39 are correspondingly connected between the guide posts 38 and the suspension bracket 40, fitting snugly on the outer periphery of the guide posts 38 to provide elastic cushioning for the sliding motion of the suspension bracket 40. A vibration motor 41 is fixedly mounted on the body of the suspension bracket 40, providing a power source for the vibrating feed assembly. The eccentric wheel 42 is rotatably connected to the suspension frame 40 via an eccentric shaft 43 integrally formed on its surface, allowing the eccentric wheel 42 to rotate relative to the suspension frame 40 around the axis of the eccentric shaft 43. During rotation, the eccentric wheel 42 vibrates the feeding bin 11. The output shaft 9 of the vibration motor 41 is connected to the eccentric shaft 43 of the eccentric wheel 42 via a transmission belt 17, allowing the power of the vibration motor 41 to be transmitted to the eccentric shaft 43, driving the eccentric wheel 42 to rotate synchronously.

[0066] Examples 3, 1, and 2 respectively addressed technical issues such as energy waste and material blockage in the feeding hopper 11 of traditional drying systems. However, in actual large-scale production, it was found that the TD75 general-purpose fixed belt conveyor used in the feeding equipment 10 inevitably experienced belt misalignment when carrying wet materials for extended periods, due to factors such as uneven material distribution, belt tension fluctuations, and frame installation errors. Belt misalignment not only causes the material conveying path to deviate, resulting in material spillage and loss, but also intensifies friction between the belt edge and the frame, shortening the belt's lifespan. In severe cases, it can even cause equipment shutdown due to the belt detaching from the rollers, disrupting the continuity of the feeding process, thereby affecting the overall production efficiency of the drying system and increasing equipment maintenance costs and material losses.

[0067] To solve the above-mentioned technical problems, this embodiment further designs an anti-deviation component based on the original belt conveyor of the feeding equipment 10 described in Embodiment 1, referring to... Figure 11 and Figure 13 ,in, Figure 13 The diagram shows the installation structure of the anti-deviation component. As can be seen from the diagram, this component is installed on the frame of the belt conveyor (the frame is not shown in the diagram). It is used to quickly return the misaligned belt to its original preset operating position, ensuring stable material feeding of the belt conveyor and thus improving the operational reliability and continuity of the entire drying system. The specific structure of the anti-deviation component is as follows.

[0068] refer to Figure 14The diagram shows a three-dimensional structural schematic of the anti-deviation component. As can be seen, the anti-deviation component includes a fixed base 44, which is mounted on the frame of the feeding equipment 10 (belt conveyor), providing a support foundation for the entire anti-deviation component. The bottom center of the mounting base 45 is rotatably connected to the fixed base 44, allowing the mounting base 45 to deflect relative to the fixed base 44 around this rotatable connection point. The left and right blocking rockers 46 and 47 are rotatably connected to the two sides of the fixed base 44, respectively. Simultaneously, the bottom center of the mounting base 45 is connected to both the left and right blocking rockers 46 and 47 via transmission belts 17, enabling the linkage between the deflection of the mounting base 45 and the movements of the left and right blocking rockers 46 and 47. The mounting base 45 has upward-curving edges on both sides. The central roller 48 is rotatably connected to the center of the mounting base 45. The left roller 49 and right roller 50 are rotatably connected to the upward-curving edges on both sides of the mounting base 45. The left roller 49, central roller 48, and right roller 50 together form a belt-adapting idler structure. When the belt is not misaligned, it is positioned in the middle area of ​​the idler structure formed by the left roller 49, central roller 48, and right roller 50. At this time, the left blocking rocker arm 46 and right blocking rocker arm 47 are located on both sides of the belt and are not in contact with the belt. At the same time, the lateral parts of the left blocking rocker arm 46 and right blocking rocker arm 47 are aligned with the length extension direction of the belt. When the belt deviates to the left, it gradually slides to the area of ​​the left roller 49 and forms a contact block with the left blocking rocker arm 46. At this time, the friction between the belt and the left roller 49 and the left blocking rocker arm 46 will drive the mounting base 45 to deflect around the rotation connection point of the mounting base 45 and the fixed base 44 (deflecting in the direction of b1), and at the same time drive the left blocking rocker arm 46 to deflect outward (that is, the left blocking rocker arm 46 deflects in the direction of b1, and the right blocking rocker arm 47 deflects in the direction of b1). The longitudinal component of the belt's own running force (along the direction of belt length extension) will act in the opposite direction on the left roller 49 and the left blocking rocker arm 46, causing the mounting base 45 and the left blocking rocker arm 46 to gradually return to their original positions, and finally drive the belt to return to the middle of the idler structure composed of the left roller 49, the central roller 48, and the right roller 50, completing the automatic mechanical anti-deviation action. The working principle of belt deviation to the right is the same as that of belt deviation to the left (when the belt deviates to the right, the mounting base 45, the left blocking rocker 46, and the right blocking rocker 47 all deflect in the direction of b2), which will not be elaborated here.

[0069] During belt misalignment, some raw materials on the belt are easily spilled into the gap between the belt and the frame as the belt deviates. These spilled materials not only cause material loss, but also tend to accumulate and clump in the gap. Long-term accumulation will increase the running resistance of the belt, aggravate the wear of the belt and the frame, increase the frequency of manual cleaning and maintenance costs, and may even interfere with the return action accuracy of the anti-misalignment component due to material jamming, affecting the anti-misalignment reliability of the component.

[0070] To address the aforementioned issues, an automatic material removal mechanism was further designed based on the existing structure of the anti-deviation component, referencing... Figure 15 The diagram shows the installation structure of the automatic unloading mechanism. As can be seen, this mechanism is connected to either the left blocking rocker arm 46 or the right blocking rocker arm 47. When the anti-deviation component drives the belt back to its original position, the left blocking rocker arm 46 or the right blocking rocker arm 47 simultaneously activates the corresponding automatic unloading mechanism to knock and clean the material between the belt and the frame. This achieves simultaneous completion of deviation correction and material cleaning, further improving the operational stability and material utilization rate of the belt conveyor. The specific structure of the automatic unloading mechanism is as follows.

[0071] refer to Figure 16-17 ,in, Figure 16 The diagram shows the installation structure of the automatic unloading mechanism corresponding to the left blocking rocker arm 46. Figure 17The diagram shows a three-dimensional structural schematic of the automatic unloading mechanism. As can be seen, the mechanism includes a geared disc 51, which is concentrically mounted on the rotating connection between the left blocking rocker arm 46 and the fixed base 44, enabling synchronous rotation of the geared disc 51 and the left blocking rocker arm 46. A guide platform 52 is fixedly mounted on the fixed base 44 and located on one side of the geared disc 51. The groove of the guide platform 52 provides a sliding guide structure for the slide table 53. The slide table 53 is slidably fitted into the groove of the guide platform 52 and can slide back and forth along the extension direction of the groove. A pin 54 is fixedly mounted on one side of the slide table 53, and a ramp 55 is slidably fitted onto the pin 54. A telescopic spring 56 is correspondingly connected between the ramp 55 and the slide table 53, providing elastic buffering and power reserve for the sliding of the ramp 55 relative to the slide table 53. The back of the toothed plate 57 is fixedly connected to the slope plate 55, and the toothed plate 57 and the slide groove 58 on the slide table 53 form a sliding fit; the teeth of the toothed plate 57 and the toothed disc 51 form a meshing fit, realizing the power transmission for the rotation of the toothed disc 51 to move towards the slide table 53. The flip plate 59 is set above the slide table 53, and one end of the flip plate 59 is rotatably connected to the other end of the slide table 53, so that the flip plate 59 can deflect relative to the slide table 53 around the connection point. The bottom of the flip plate 59 has a wedge block 60 integrally formed, and the slide table 53 has a protrusion 61 at one end opposite to the flip plate 59. The wedge block 60 and the protrusion 61 are arranged correspondingly to form a contact limiting fit. The buffer unit 62 is fixedly assembled to the other end of the slide table 53; the collision plate 63 is fixedly installed on the fixed base 44, and the buffer unit 62 and the collision plate 63 are arranged correspondingly to form a collision fit. The automatic unloading mechanism on the right blocking rocker 47 side has the same connection relationship between its components as that on the left blocking rocker 46 side, so it will not be described again here.

[0072] Based on the above connections, the working principle of the automatic feeding mechanism is as follows.

[0073] First, the working principle of the automatic unloading mechanism on the side of the left blocking joystick 46: (Refer to...) Figure 18-19 ,in, Figure 18 The diagram shown illustrates the motion state of the automatic unloading mechanism on the left blocking rocker arm 46 during the first stage. Figure 19 The diagram shown illustrates the motion state of the automatic unloading mechanism on the left blocking rocker arm 46 during the second stage.

[0074] Step 1: When the belt is not misaligned, the left blocking rocker arm 46 is in the initial position, and all components of the automatic unloading mechanism are reset; the slide table 53 is located on the side of the guide table 52 groove away from the collision plate 63, the buffer unit 62 is separated from the collision plate 63, the telescopic spring 56 is in a naturally extended state, the toothed plate 57 and the toothed disc 51 are engaged, the flip plate 59 is arranged horizontally, and the wedge block 60 is opposite to the protrusion 61 of the slide table 53 but not in contact.

[0075] Step 2: When the belt deviates to the left, the left blocking rocker arm 46 returns to its original position along the b2 direction under the action of the anti-deviation component, and the gear plate 51, which is coaxially mounted with the left blocking rocker arm 46, rotates synchronously; the gear plate 51 meshes with the gear plate 57 through its teeth, driving the gear plate 57 to move the slide table 53 along the guide table 52 groove towards the collision plate 63 (c1 direction).

[0076] In the first stage, as the slide table 53 moves along the c1 direction, the protrusion 61 at the end of the slide table 53 first contacts the wedge block 60 at the bottom of the flip plate 59. The wedge block 60 forms a limiting block on the protrusion 61, forcing the slide table 53 to stop moving. At this time, the gear plate 51 continues to mesh and drive the gear plate 57. The gear plate 57 drives the slope plate 55 to slide relative to the slide table 53 along the pin 54, compressing the telescopic spring 56 between the slope plate 55 and the slide table 53. Energy is stored through the compression of the telescopic spring 56.

[0077] In the second stage, as the ramp 55 continues to move along the c1 direction, the downward slope of the side end of the ramp 55 comes into contact with the flip plate 59. Under the guidance of the slope, the flip plate 59 is forced to flip along the d1 direction until the wedge block 60 completely disengages from the contact limit of the protrusion 61. The telescopic spring 56 releases its stored energy instantly, pushing the slide table 53 to pop out quickly along the c1 direction. The buffer unit 62 at the end of the slide table 53 collides violently with the collision plate 63 on the fixed seat 44. The vibration generated by the collision is transmitted to the connection between the frame and the belt, causing the material scattered in the gap to fall off and completing the material removal action.

[0078] Step 3: When the left blocking rocker arm 46 moves away from the belt along the b1 direction, the gear plate 51 rotates in the opposite direction. Through the meshing of the gear plate 57, it drives the slide table 53 to move away from the collision plate 63 (c2 direction) along the groove of the guide table 52. At this time, the protrusion 61 of the slide table 53 slides along the slope of the wedge block 60 of the flip plate 59 and passes over the wedge block 60. The flip plate 59 returns to the horizontal state under its own gravity or the action of the reset structure. The extension spring 56 gradually extends and resets. The buffer unit 62 moves away from the collision plate 63. The automatic material removal mechanism returns to the initial preparation state and waits for the next collision material removal.

[0079] Second, the automatic unloading mechanism on the right blocking rocker 47 side works on the same principle as the one on the left blocking rocker 46 side. At the same time, when the right blocking rocker 47 deflects away from the belt, the buffer unit 62 on the left blocking rocker 46 side will undergo adaptive compression on the collision plate 63, ensuring that the actions of the two mechanisms are coordinated and do not interfere with each other.

[0080] In summary, this automatic material removal mechanism achieves synchronous linkage between the anti-deviation action and the material removal action through the linkage transmission between the blocking rocker and the toothed disc 51, combined with the energy release of the telescopic spring 56 and the mechanical collision vibration. It can automatically complete the cleaning of materials in the gaps without the need for an additional power source, and has a compact structure and high reliability.

Claims

1. A novel solar electrothermal energy storage high efficiency drum drying system characterized by: The base is fixedly connected with the feeding groove through the support, and the solar PV panel is arranged on the base in a horizontal plane through a support structure; the solid-state electric heating energy storage heat exchanger, the feeding groove and the drying roller are sequentially connected in a horizontal direction to form a continuous flow path for fresh air and materials, the outlet of the solid-state electric heating energy storage heat exchanger is connected with the air inlet of the feeding groove, and the air outlet of the feeding groove is rotatably connected with one end of the drying roller; the first roller driving device is drivingly connected with the drying roller to drive the drying roller to rotate around its axis; the outlet of the feeding device is connected with the air inlet of the feeding bin, and the feeding bin is arranged above the drying roller and has an air outlet corresponding to the air inlet of the drying roller to convey the wet materials to be dried; the solar PV panel and the solid-state electric heating energy storage heat exchanger are electrically connected with the PLC.

2. The novel solar photo-thermal energy efficient roller drying system of claim 1, wherein: The solar PV panel comprises a photovoltaic panel and a support, the photovoltaic panel is formed by splicing and fixing a plurality of unit photovoltaic panels to form a complete photovoltaic panel body; the support comprises a horizontal cross bar, a vertical support column and a base, the horizontal cross bar is fixedly connected with the photovoltaic panel through a fixing connector, the upper end of the vertical support column is fixedly connected with the horizontal cross bar, and the lower end of the vertical support column is stably connected with the base.

3. The novel solar photo-thermal energy efficient roller drying system of claim 1, wherein: The first roller driving device comprises a gear ring, the gear ring is in an annular structure and is coaxially fixedly installed on the outer wall of the drying roller to form an integrated rotating member with the drying roller; a gear is fixedly connected with the output shaft end of the servo motor in a concentric manner; the gear and the gear ring are meshed with each other to form a gear transmission pair to realize power transmission from the servo motor to the drying roller; the bottom of the servo motor is fixedly connected with the base.

4. The novel solar photo-thermal energy efficient roller drying system of claim 1, wherein: The cleaning assembly is installed on the solar PV panel and used for cleaning the pollutants on the surface of the solar PV panel.

5. The novel solar photo-thermal energy efficient roller drying system of claim 4, wherein: The cleaning assembly comprises a support arm, which is fixedly installed on the top region of the solar PV panel; a sliding seat is in sliding fit with the support arm, the bottom of the sliding seat is provided with a protrusion which is slidably penetrated through a long slot in the support arm, so that the sliding seat can reciprocate along the length direction of the support arm; a scraper is fixedly assembled on the sliding seat, the working end surface of the scraper is in contact with the surface of the solar PV panel, so that the cleaning action is completed by adhering to the surface of the PV panel when the sliding seat moves; the protrusion at the bottom of the sliding seat is fixedly connected with a transmission belt, the transmission belt is drivingly connected with a pulley and an output shaft of a steering engine at two ends, and the pulley and the steering engine are fixedly installed on the support arm.

6. The novel solar photo-thermal energy efficient roller drying system of claim 1, wherein: The waste heat recovery device is connected with the outlet of the drying roller and used for recovering the exhaust gas discharged from the drying roller and preheating the normal-temperature fresh air before entering the drying roller by using the heat of the recovered exhaust gas.

7. The novel solar photo-thermal energy efficient roller drying system of claim 6, wherein: The waste heat recovery device comprises a fresh air outer cavity; the fresh air outer cavity is integrally formed on the outer wall of the tail gas inner cavity, and the two together constitute the main cavity structure of the waste heat recovery device; the fresh air outer cavity is fixed on the base; the fresh air outer cavity is provided with an air inlet and an air outlet; the air outlet of the fresh air outer cavity is communicated with one end of the fresh air pipeline; the other end of the fresh air pipeline is communicated with the air inlet of the solid-state electric heating energy storage heat exchanger; the air inlet outer edge of the tail gas inner cavity is rotatably connected with the drying drum and the inner cavities of the two are communicated; the gas collecting cavity is arranged inside the tail gas inner cavity and fixedly connected with the tail gas inner cavity through the finned heat exchange pipe; the spiral feeder is arranged at the bottom side of the fresh air outer cavity; the discharge port of the tail gas inner cavity is used for receiving the material discharged by the drying drum; the gas collecting cavity is communicated with the cavity of the drying drum to receive the tail gas.

8. The novel solar photo-thermal energy efficient roller drying system of claim 6, wherein: The waste heat recovery device further comprises a fresh air preheating device; the fresh air preheating device is arranged on the air inlet outer edge of the fresh air outer cavity of the waste heat recovery device, and is used for preheating the fresh air before entering the waste heat recovery device.

9. The novel solar photo-thermal energy efficient roller drying system of claim 8, wherein: The fresh air preheating device comprises a flow guide pipe; the flow guide pipe is concentrically arranged in the inner wall of the material turning drum, is fixedly connected with the tail gas inner cavity and is communicated, and provides a flow channel for the tail gas discharged by the drying drum; the material turning drum is rotatably connected with the fresh air outer cavity and is communicated, and provides a closed cavity for heat exchange between the material and the fresh air to be preheated; the turning teeth are arranged in an annular array on the inner wall of the material turning drum, and rotate the material with the material turning drum; the inner heat exchange fins are concentrically arranged on the inner wall of the flow guide pipe, and the outer heat exchange fins are concentrically arranged on the outer wall of the flow guide pipe, which together conduct the waste heat of the tail gas to the fresh air in the material turning drum; the second roller driving device is arranged on the material turning drum to drive the material turning drum to rotate continuously; The material guide bin is fixed beside the base and directly below the material discharge port of the material turning drum, and is used for receiving the cooled material discharged by the material turning drum; the material discharge belt conveyor is arranged below the material guide bin and conveys the material to a designated collection point; the air guide fan is connected to the end of the flow guide pipe, and the air outlet of the air guide fan is fixedly communicated with the tail gas discharge pipeline.

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