Superconducting heat pipe type biomass hot blast stove and energy-saving safe drying system

Abstract

The invention discloses a superconducting heat pipe type biomass hot blast stove and an energy-saving safe grain drying system. The hot blast stove comprises a shell, a stove body, a hot air pipe, a superconductive heat pipe and a smoke exhaust pipe. The interior of the shell is divided into a heat gathering bin, a clean heat chamber and a dust settling chamber. The furnace body is arranged in the heat collecting bin for heat supply, and the hot air pipe is connected with the furnace body and the dust settling chamber. A superconductive heat pipe is installed on the pipe plate in a penetrating mode and filled with a superconductive medium, and hearth smoke in the dust settling chamber is conducted to the clean heat chamber. The smoke exhaust pipe is arranged in the clean heat chamber, and air is further heated through hearth smoke heat of the smoke exhaust pipe. Air is preheated by the clean heat chamber and then enters the heat collecting bin for secondary heating, and a stepped heating process is formed. The invention further provides a grain drying system comprising the hot blast stove, and efficient and uniform drying operation is achieved through a closed-loop hot air circulation and grain circulation lifting device. The heat efficiency, safety and temperature stability are greatly improved, energy consumption and pollutant emission are remarkably reduced, and remarkable energy-saving and environment-friendly benefits are achieved.

Description

Technical Field

[0001] This invention relates to the field of drying equipment technology, specifically to a superconducting heat pipe biomass hot air furnace and an energy-saving and safe grain drying system. Background Technology

[0002] In the field of agricultural grain drying, the hot air furnace, as the core heat source equipment of the dryer, directly affects the drying efficiency, drying quality, and operating costs. Currently, traditional hot air furnaces on the market suffer from the following key technical defects:

[0003] 1. Low heat utilization efficiency and serious energy waste: The flue gas generated by the combustion in the furnace of traditional hot air furnace is mostly discharged directly to the outside through the flue pipe. A large amount of waste heat contained in the flue gas is not effectively recovered, resulting in a high heat loss rate. At the same time, outside air directly enters the heating area for single heating without a preheating process, requiring more fuel to reach the target temperature, resulting in high energy costs.

[0004] 2. Poor environmental performance and excessive pollutant emissions: Traditional hot air furnaces do not have a dedicated dust settling structure. The flue gas generated by combustion in the furnace carries a large amount of particulate matter, which can easily cause air pollution if directly emitted, making it difficult to meet current environmental emission standards. Moreover, due to the low heat utilization efficiency, more fuel needs to be burned, which indirectly increases the emissions of harmful gases such as CO2 and SO2.

[0005] 3. Poor hot air temperature stability and poor drying quality: Traditional hot air furnaces use a "one-step heating" method, where cold air from the outside comes into direct contact with a high-temperature heat source. This can easily cause local temperature fluctuations that are too high or too low, resulting in a temperature deviation of the output hot air that often exceeds ±10℃. When the unstable hot air is delivered to the dryer, it can easily cause local over-drying, clumping, or incomplete drying of the grains, significantly reducing the pass rate of the dried products.

[0006] 4. Significant safety hazards and fire risks: In traditional tube-type hot blast stoves, the tubes oxidize each time they come into contact with high-temperature flue gas. After long-term use, the tube walls are prone to rust and perforation; or, due to ash accumulation and blockage inside the tubes, the flow cross-section is reduced, causing a sudden increase in local temperature, which softens the tube walls or even melts through. Once a certain part is damaged, high-temperature flames or flue gas can be directly injected into the clean heat chamber and enter the grain layer with the hot air, which can easily cause a grain fire accident and seriously affect production safety.

[0007] The aforementioned defects make it difficult for traditional hot air furnaces to meet the drying needs of modern agriculture, which require large-scale, energy-saving, environmentally friendly, and safe drying. Therefore, developing a hot air furnace that is highly efficient, energy-saving, environmentally compliant, temperature-stable, and safe to operate has become an urgent problem for the industry. Summary of the Invention

[0008] The purpose of this invention is to overcome the above-mentioned technical problems and provide a superconducting heat pipe biomass hot air furnace and an energy-saving and safe grain drying system, which has the advantages of high efficiency and energy saving, environmental protection compliance, stable temperature and safe operation.

[0009] The technical solution of the present invention:

[0010] This invention provides a superconducting heat pipe type biomass hot air furnace, including an outer shell, a furnace body, a hot air pipe, a superconducting heat pipe, and an exhaust pipe; the outer shell has a heat-gathering chamber formed inside by a partition, and a hot air delivery port communicating with the heat-gathering chamber is opened on the outer shell; the furnace body is installed inside the heat-gathering chamber, and a furnace chamber for fuel combustion is formed inside the furnace body; the hot air pipe is connected to the furnace body and located inside the heat-gathering chamber; a tube sheet is installed inside the outer shell at the air outlet end of the hot air pipe, and the tube sheet divides the interior of the outer shell into a clean heat chamber and a dust settling chamber. The hot chamber has an air inlet at one end and a hot air outlet connected to the heat-gathering chamber at the other end; one end of the hot air pipe is connected to the furnace body and the other end is connected to the dust settling chamber; multiple pipe holes are opened on the tube sheet, and a superconducting heat pipe is installed through each pipe hole. One end of the superconducting heat pipe is located in the clean hot chamber and the other end is located in the dust settling chamber. The superconducting heat pipe is filled with a superconducting medium; the flue pipe is installed in the clean hot chamber, the flue pipe's bottom inlet is connected to the dust settling chamber, and the flue pipe's top outlet is connected to the outside.

[0011] According to one embodiment of the present invention, uniformly arranged heat dissipation fins are connected to the outer wall surface of the furnace body and the hot air duct.

[0012] According to one embodiment of the present invention, a fuel feeding device for adding fuel to the furnace body is further included. The fuel feeding device includes a screw conveyor, a loading hopper, and a unloading hopper. The screw conveyor is installed on the side wall of the furnace body, the loading hopper is installed at the loading end of the screw conveyor, and the unloading hopper is installed at the unloading end of the screw conveyor and communicates with the furnace body. The screw conveyor, the loading hopper, and the unloading hopper are all installed inside the outer shell.

[0013] According to one embodiment of the present invention, the screw conveyor and the feeding hopper are located in the feeding bin formed by the separation inside the outer shell, the feeding bin has a door at the top, and the top opening of the feeding hopper corresponds to the position of the door.

[0014] According to one embodiment of the present invention, two upper ash baffles are installed on the inner top wall of the dust settling chamber, and a lower ash baffle is installed on the inner bottom wall of the dust settling chamber, with the lower ash baffle located between the two upper ash baffles; the bottom smoke inlet of the exhaust pipe is far away from the air outlet of the hot air pipe; and an ash discharge door is provided on the outer shell near the bottom of the dust settling chamber.

[0015] According to one embodiment of the present invention, heat dissipation fins are installed on the outer peripheral surface of a section of the superconducting heat pipe and the exhaust pipe located in the clean heat chamber.

[0016] According to one embodiment of the present invention, the device further includes a converging hood and a chimney, wherein the converging hood is mounted on the housing and covers the exhaust ports of the plurality of exhaust pipes, and the chimney is connected to the converging hood.

[0017] According to one embodiment of the present invention, an exhaust fan is installed between the converging hood and the chimney to regulate the gas flow from the furnace body → hot air pipe → dust settling chamber → exhaust pipe → converging hood → chimney.

[0018] According to one embodiment of the present invention, the outer shell is a double-shell structure, and the double-shell structure is filled with heat-insulating material.

[0019] The present invention also provides an energy-saving and safe grain drying system, including a superconducting heat pipe biomass hot air furnace, a dryer, an air inlet pipe, an air outlet pipe, and a fan as described in the above embodiments; the hot air inlet of the superconducting heat pipe biomass hot air furnace is connected to the hot air inlet of the dryer through the air inlet pipe, and the air outlet of the dryer is connected to the air outlet pipe and the fan.

[0020] The superconducting heat pipe biomass hot air furnace of the present invention, through the coordinated design of the outer shell, furnace body, hot air pipe, superconducting heat pipe and flue pipe, combined with the heat gathering chamber, clean heat chamber and dust settling chamber formed by the tube sheet partition, specifically solves the technical defects of traditional hot air furnaces, and has significant technical advantages as a whole, as follows:

[0021] I. Significantly Improved Heat Utilization Efficiency and Remarkable Energy Saving: This invention achieves highly efficient heat utilization through a dual design of "waste heat recovery + staged heating." On one hand, the superconducting medium filled in the superconducting heat pipe possesses highly efficient heat conduction characteristics, which can quickly transfer the heat of the flue gas in the dust settling chamber to the clean heating chamber. Simultaneously, the exhaust pipe is installed in the clean heating chamber, and its pipe wall can further release the flue gas heat from the furnace into the clean heating chamber, allowing outside air to enter the clean heating chamber through the air inlet and complete double preheating. On the other hand, the preheated air enters the heat collection chamber through the hot air outlet, and undergoes secondary heating through the furnace body (furnace combustion heat release) and the hot air pipe (transporting heat from the furnace body), forming a stepped heat utilization process. This design significantly improves the overall thermal efficiency of the hot air furnace compared to traditional equipment. The heat transfer speed of the superconducting heat pipe is faster than that of ordinary heat-conducting elements, greatly shortening the heating cycle, effectively reducing fuel consumption, and lowering energy costs.

[0022] II. Excellent environmental performance and significantly reduced pollutant emissions: The interior of the outer shell is divided into independent dust settling chambers by tube plates. The flue gas generated by combustion in the furnace must first enter the dust settling chamber to complete the dust settling before being discharged to the outside through the exhaust pipe. This effectively reduces particulate matter in the flue gas and avoids pollution caused by direct dust emissions, meeting environmental emission standards. At the same time, the waste heat recovery design of the superconducting heat pipe and exhaust pipe reduces the amount of fuel combustion, indirectly reducing the emissions of harmful gases such as CO2 and SO2, achieving the dual benefits of energy saving and environmental protection.

[0023] III. Stable and Uniform Hot Air Temperature, Significantly Improved Drying Quality: The outside air employs a staged heating method of "preheating in the clean heating chamber + reheating in the heat-concentrating chamber": the clean heating chamber preheats the air through superconducting heat pipes and exhaust pipes, avoiding temperature fluctuations caused by cold air directly contacting the high-temperature heat source; the heat-concentrating chamber reheats the air through continuous heat release from the furnace body and hot air pipes, and the closed structure of the heat-concentrating chamber maintains a stable temperature environment. The temperature deviation of the hot air delivered to the dryer through the hot air outlet is minimal, significantly better than traditional hot air furnaces; the stable heat source ensures uniform grain drying, effectively avoiding problems such as incomplete drying, over-drying, or clumping, thus improving the quality and pass rate of the dried product.

[0024] IV. Significantly Enhanced Safety Performance and Elimination of Fire Hazards: This invention utilizes superconducting heat pipes for heat transfer through an internal medium, ensuring the pipe walls do not directly contact the flue gas, thus fundamentally avoiding oxidation and corrosion problems. Simultaneously, the outer wall of the superconducting heat pipe is equipped with heat dissipation fins, resulting in high heat dissipation efficiency and uniform temperature distribution within the pipe body, preventing overheating due to localized blockages. Furthermore, each superconducting heat pipe operates independently; even if one pipe fails, it will not affect the operation of other heat pipes, and it will not allow high-temperature flue gas or sparks to enter the clean heat chamber, thereby completely eliminating the possibility of grain ignition and ensuring long-term safe production.

[0025] V. Low operating costs and long equipment lifespan: Core components such as superconducting heat pipes and tube sheets are made of high-temperature and corrosion-resistant materials, possessing excellent anti-loss performance; the dust settling chamber reduces dust adhesion in the exhaust pipes, lowering the risk of pipe blockage and corrosion, and reducing equipment maintenance frequency and costs; in addition, the heat recovery design reduces fuel consumption, further reducing operating costs. Overall, it significantly extends the service life of the hot blast stove, demonstrating outstanding long-term economic efficiency.

[0026] In summary, the superconducting heat pipe biomass hot air furnace of the present invention achieves breakthroughs in heat utilization, environmental performance, drying quality, safety performance, and operational economy through the optimized layout and functional synergy of various components (shell, furnace body, hot air pipe, superconducting heat pipe, flue pipe, etc.). It effectively solves the technical defects of traditional hot air furnaces and can be widely used in agricultural grain drying and other fields, possessing extremely high practical value and promotion prospects.

[0027] The preferred embodiments of the present invention and their beneficial effects will be further described in detail with reference to specific implementation methods. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but should not be construed as limiting the invention. In the drawings:

[0029] Figure 1 This is a first-view perspective perspective view of the superconducting heat pipe biomass hot air furnace of the present invention;

[0030] Figure 2 This is a second-view perspective perspective view of the superconducting heat pipe biomass hot air furnace of the present invention;

[0031] Figure 3 This is a diagram showing the internal structure of the superconducting heat pipe biomass hot air furnace of the present invention.

[0032] Figure 4 This is a cross-sectional view of the superconducting heat pipe biomass hot air furnace of the present invention.

[0033] Figure 5 This is a structural diagram of the superconducting heat pipe of the superconducting heat pipe biomass hot air furnace of the present invention;

[0034] Figure 6 This is a first-view perspective perspective view of the grain drying system of the present invention;

[0035] Figure 7 This is a second-view perspective perspective view of the grain drying system of the present invention.

[0036] The diagram shows the following components: 1. Outer shell; 2. Furnace body; 3. Hot air duct; 4. Superconducting heat pipe; 5. Exhaust pipe; 6. Fuel feeding device; 7. Converging hood; 8. Chimney; 9. Exhaust fan; 11. Tube sheet; 100. Superconducting heat pipe biomass hot air furnace; 101. Heat collection chamber; 102. Hot air conveying port; 103. Clean heat chamber; 104. Dust settling chamber; 105. Hot air outlet; 106. Feeding hopper; 107. Upper ash plate; 108. Lower ash plate; 109. Ash discharge door; 110. Air inlet; 111. Heat dissipation fins; 21. Ash discharge pipe; 22. Superconducting medium; 41. Heat dissipation fins; 42. Screw conveyor; 61. Feeding hopper; 62. Discharging hopper; 63. Dryer; 200. Box; 201. Elevator; 202. Air inlet pipe; 300. Exhaust pipe; 400. Exhaust fan; 500. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0038] Please see Figures 1 to 4The present invention provides a superconducting heat pipe type biomass hot air furnace 100, including a shell 1, a furnace body 2, a hot air pipe 3, a superconducting heat pipe 4, and a flue pipe 5.

[0039] The interior of the outer shell 1 is divided by a partition to form a heat-collecting chamber 101. A hot air inlet 102 is provided on the outer shell 1 to communicate with the heat-collecting chamber 101, for connection to the dryer 200. Figure 6 The furnace body 2 is installed inside the heat-concentrating chamber 101. A furnace chamber for fuel combustion is formed inside the furnace body 2. The heat generated by combustion in the furnace chamber is transferred through the furnace body 2 to the heat-concentrating chamber 101 to heat the drawn-in outside air.

[0040] Hot air duct 3 is connected to furnace body 2 and located inside heat collection chamber 101.

[0041] A tube sheet 11 is installed inside the outer casing 1 at the air outlet of the hot air duct 3. The tube sheet 11 divides the interior of the outer casing 1 into a clean heat chamber 103 and a dust settling chamber 104. The clean heat chamber 103 has an air inlet 111 at one end and a hot air outlet 105 at the other end. The clean heat chamber 103 is connected to the heat collection chamber 101 through the hot air outlet 105.

[0042] One end of the hot air duct 3 is connected to the furnace body 2, and the other end is connected to the dust settling chamber 104, so as to transfer the heat in the furnace body 2 to the dust settling chamber 104.

[0043] Please see Figure 4 and Figure 5 The tube sheet 11 has multiple holes, and a superconducting heat pipe 4 is installed through each hole. One end of the superconducting heat pipe 4 is located in the clean heat chamber 103, and the other end is located in the dust settling chamber 104. The superconducting heat pipe 4 is filled with a superconducting medium 41 to conduct heat from the dust settling chamber 104 to the clean heat chamber 103 for heating the outside air drawn in through the air inlet 111.

[0044] The flue pipe 5 is installed inside the clean heat chamber 103. The flue pipe 5 has a flue gas inlet at its bottom end that connects to the dust settling chamber 104, and a flue gas outlet at its top end that connects to the outside. The furnace flue gas heat inside the flue pipe 5 is conducted through the pipe wall to the clean heat chamber 103 to heat the drawn-in outside air.

[0045] Figure 4 The middle arrow indicates the airflow direction. In use, the hot air inlet 102 is connected to the hot air inlet of the dryer 200. An exhaust fan 500 is installed at the exhaust port of the dryer 200. Figure 6Fuel is added to the furnace chamber of furnace body 2 for combustion, and the heat generated is transferred to the heat-gathering chamber 101 through furnace body 2. A suction fan 500 draws outside air into the clean heat chamber 103 through air inlet 111, preheats it via exhaust pipe 5 and superconducting heat pipe 4, and then enters the heat-gathering chamber 101. The air drawn into the heat-gathering chamber 101 is heated by furnace body 2 and hot air pipe 3, and then transported to dryer 200 through hot air outlet 102 for drying grains. Dryer 200 exhausts waste gas through exhaust fan 500. The flue gas settles dust in dust chamber 104 and heats one section of superconducting heat pipe 4 before being discharged to the outside through exhaust pipe 5. The superconducting medium 41 inside superconducting heat pipe 4 transfers heat to the other section of superconducting heat pipe 4, thereby heating the air in clean heat chamber 103. The superconducting medium 41 is a working fluid with high thermal conductivity, such as water, methanol, acetone, or liquid metals such as sodium or potassium. It undergoes a gas-liquid phase change at the operating temperature to achieve efficient heat transfer.

[0046] The superconducting heat pipe biomass hot air furnace 100 of the present invention, through the coordinated design of the outer shell 1, furnace body 2, hot air pipe 3, superconducting heat pipe 4 and flue pipe 5, combined with the heat-gathering chamber 101, clean heat chamber 103 and dust-reducing chamber 104 formed by the tube plate 11, specifically solves the technical defects of traditional hot air furnaces and has significant technical advantages as a whole, as detailed below:

[0047] I. Significantly Improved Heat Utilization Efficiency and Remarkable Energy Saving: This invention achieves highly efficient heat utilization through a dual design of "waste heat recovery + staged heating." On one hand, the superconducting medium 41 filled inside the superconducting heat pipe 4 possesses highly efficient heat conduction characteristics, which can quickly transfer the heat of the flue gas in the dust settling chamber 104 to the clean heating chamber 103. Simultaneously, the exhaust pipe 5 is installed inside the clean heating chamber 103, and its pipe wall can further release the furnace flue heat to the clean heating chamber 103, allowing outside air to enter the clean heating chamber 103 through the air inlet 111 and complete double preheating. On the other hand, the preheated air enters the heat collection chamber 101 through the hot air outlet 105, and undergoes secondary heating through the furnace body 2 (furnace combustion heat release) and the hot air pipe 3 (transporting heat from the furnace body 2), forming a stepped heat utilization process. This design significantly improves the overall thermal efficiency of the hot air furnace 100 compared to traditional equipment. The heat transfer speed of the superconducting heat pipe 4 is faster than that of ordinary heat-conducting elements, greatly shortening the heating cycle, effectively reducing fuel consumption, and lowering energy costs.

[0048] II. Excellent environmental performance and significantly reduced pollutant emissions: The interior of the outer shell 1 is divided into an independent dust settling chamber 104 by the tube plate 11. The flue gas generated by combustion in the furnace chamber of the furnace body 2 must first enter the dust settling chamber 104 to complete the dust settling, and then be discharged to the outside through the exhaust pipe 5, which effectively reduces particulate matter in the flue gas and avoids pollution caused by direct dust emission, meeting environmental emission standards. At the same time, the waste heat recovery design of the superconducting heat pipe 4 and the exhaust pipe 5 reduces the amount of fuel combustion, indirectly reducing the emission of harmful gases such as CO2 and SO2, achieving the dual benefits of energy saving and environmental protection.

[0049] III. Stable and uniform hot air temperature, significantly improving drying quality: The outside air adopts a staged heating method of "preheating in the clean heating chamber + reheating in the heat-gathering chamber": the clean heating chamber 103 preheats the air through the superconducting heat pipe 4 and the exhaust pipe 5, avoiding temperature fluctuations caused by cold air directly contacting the high-temperature heat source; the heat-gathering chamber 101 reheats the air through the continuous heat release of the furnace body 2 and the hot air pipe 3, and the closed structure of the heat-gathering chamber 101 can maintain a stable temperature environment. Finally, the hot air temperature deviation delivered to the dryer 200 through the hot air conveyor 102 is small, which is significantly better than that of traditional hot air furnaces; the stable heat source ensures uniform drying of grains, effectively avoiding problems such as incomplete drying, over-drying, or clumping, and improving the quality and pass rate of dried products.

[0050] IV. Significantly Enhanced Safety Performance and Elimination of Fire Hazards: This invention utilizes a superconducting heat pipe 4 for heat transfer through an internal medium, ensuring the pipe wall does not directly contact the flue gas, thus fundamentally avoiding oxidation and corrosion problems. Simultaneously, the outer wall of the superconducting heat pipe 4 is equipped with heat dissipation fins, resulting in high heat dissipation efficiency and uniform temperature distribution within the pipe body, preventing overheating due to localized blockages. Furthermore, each superconducting heat pipe 4 operates independently; even if one pipe fails, it will not affect the operation of other heat pipes, and will not allow high-temperature flue gas or sparks to enter the clean heat chamber, thereby completely eliminating the possibility of grain ignition and ensuring long-term safe production.

[0051] V. Low operating costs and long equipment service life: Core components such as the superconducting heat pipe 4 and tube sheet 11 are made of high-temperature and corrosion-resistant materials, possessing excellent anti-loss performance; the dust settling chamber 104 reduces dust adhesion in the exhaust pipe 5, lowering the risk of pipe blockage and corrosion, and reducing equipment maintenance frequency and costs; in addition, the heat recovery design reduces fuel consumption, further reducing operating costs. Overall, extending the service life of the hot air furnace 100 results in outstanding long-term economic benefits.

[0052] In summary, the superconducting heat pipe biomass hot air furnace 100 of the present invention achieves breakthroughs in heat utilization, environmental performance, drying quality, safety performance, and operational economy through the optimized layout and functional synergy of its various components (shell 1, furnace body 2, hot air pipe 3, superconducting heat pipe 4, exhaust pipe 5, etc.). It effectively solves the technical defects of traditional hot air furnaces and can be widely used in fields such as agricultural grain drying, possessing extremely high practical value and promotion prospects.

[0053] In this embodiment, a support frame is installed inside the outer shell 1. The outer shell 1 has a double-shell structure and is filled with heat insulation material to reduce heat loss inside the outer shell 1.

[0054] In this embodiment, uniformly arranged heat dissipation fins 21 are connected to the outer wall surfaces of the furnace body 2 and the hot air duct 3. The heat dissipation fins 21 increase the contact area between the furnace body 2 and the hot air duct 3 and the air inside the heat-gathering chamber 101, allowing the heat generated by combustion in the furnace to be transferred more quickly through the furnace wall to the surrounding air. The uniform arrangement of the heat dissipation fins 21 on the outer wall surface of the furnace body 2 disperses the heat released by the furnace body to various areas of the heat-gathering chamber 101, avoiding the problems of excessively high or insufficient local temperatures in traditional furnace bodies. The heat dissipation fins 21 accelerate the dissipation of heat from the surface of the furnace body 2, preventing excessively high local temperatures in the furnace body due to high furnace temperatures, which could lead to thermal deformation or material fatigue. Through the heat dissipation and buffering effect of the fins, damage to the furnace structure from thermal stress is significantly reduced, extending the service life of the furnace body and lowering the maintenance and replacement costs due to furnace damage.

[0055] In this embodiment, the furnace body 2 can be a cylindrical cylinder. A ventilation opening communicating with the outside is provided at the bottom of the furnace body 2. An ash discharge pipe 22 is connected to the outer wall of the bottom of the furnace body 2 for ash removal. The ventilation opening at the bottom of the furnace body 2 allows for the direct introduction of sufficient fresh air from the outside, providing ample oxygen for fuel combustion within the furnace. The ash discharge pipe 22 connected to the outer wall of the bottom of the furnace body 2 creates a convenient ash removal channel, solving the problem of "difficult-to-clean ash accumulation" in traditional equipment.

[0056] In this embodiment, the superconducting heat pipe biomass hot air furnace of the present invention further includes a fuel feeding device 6 for adding fuel to the furnace body 2. The fuel feeding device 6 includes a screw conveyor 61, a feeding hopper 62, and a discharging hopper 63. The screw conveyor 61 is installed on the side wall of the furnace body 2, and the feeding hopper 62 is installed at the feeding end of the screw conveyor 61. The discharging hopper 63 is installed at the discharging end of the screw conveyor 61 and communicates with the interior of the furnace body 2. The screw conveyor 61, the feeding hopper 62, and the discharging hopper 63 are all installed inside the outer shell 1. The screw conveyor 61 and the feeding hopper 62 are located in the feed bin 106 formed by partitioning inside the outer shell 1. A bin door 107 is opened at the top of the feed bin 106. The top opening of the feeding hopper 62 corresponds to the position of the bin door 107, so that the fuel put in at the inlet of the bin door 107 flows into the feed bin 106 and the feeding hopper 62.

[0057] By incorporating a fuel feeding device 6, this invention significantly optimizes the convenience, stability, and safety of fuel supply, with the following specific benefits:

[0058] I. Achieve a stable and quantitative supply of fuel to ensure combustion efficiency and hot air stability.

[0059] 1. Precise Quantity Control via Screw Conveyor: The screw conveyor device 61 achieves quantitative fuel delivery through the uniform rotation of the screw blades. The conveying speed can be adjusted according to the combustion requirements of the furnace (such as hot air temperature feedback) to keep the amount of fuel entering the furnace body 2 stable. Compared with the problem of "sometimes too much and sometimes too little" in traditional manual feeding, the fuel supply deviation can be controlled within ±5%, avoiding incomplete combustion (producing black smoke and wasting fuel) caused by excessive fuel or a sudden drop in furnace temperature caused by insufficient fuel. This ensures continuous and stable heat release from the furnace, reduces the temperature fluctuation range of the hot air output from the heat-gathering chamber 101, and improves the uniformity of grain drying.

[0060] 2. Uninterrupted continuous feeding: The feed hopper 106 and the loading hopper 62 can temporarily store a certain amount of fuel, which, together with the continuous operation of the screw conveyor 61, achieves "one-time feeding and continuous feeding". The equipment can run continuously for a long time without manual intervention, and is especially suitable for long-term operation scenarios of large-scale grain drying, improving the overall drying efficiency.

[0061] II. Simplify material feeding operations and improve safety and the quality of the working environment.

[0062] 1. Significantly improved ease of feeding: The door 107 at the top of the feed hopper 106 corresponds to the opening at the top of the feeding hopper 62. Operators only need to put fuel (such as biomass pellets or coal blocks) through the door 107. The fuel will fall naturally into the feed hopper 106 and the feeding hopper 62 and enter the screw conveyor 61. There is no need to bend over or come into contact with the high-temperature furnace body. The feeding action is simplified and the labor intensity is reduced. It is especially suitable for elderly people or operators with weak physical strength.

[0063] 2. Enclosed Conveying System Prevents Fume and Dust Spillage: After fuel is introduced through the hopper 107, it is conveyed within a closed channel consisting of the feed hopper 106, the loading hopper 62, the screw conveyor 61, and the unloading hopper 63. This avoids the problem of high-temperature flue gas and dust from spilling out of the furnace during traditional open feeding operations, reducing dust concentration in the working environment. Operators are protected from smoke and dust irritation, and heat loss is reduced, indirectly improving thermal efficiency.

[0064] III. Integrated structural design saves space and reduces maintenance costs.

[0065] 1. Compact layout saves space: The screw conveyor 61, the feeding hopper 62, and the unloading hopper 63 are all integrated into the outer casing 1. Furthermore, the screw conveyor 61 and the feeding hopper 62 are centrally located in an independent feeding bin 106, avoiding cross-interference with core heat exchange areas such as the heat-collecting bin 101 and the clean heat chamber 103. Compared to traditional "external feeding mechanisms," the overall size of the equipment is reduced by 15%-20%, making it particularly suitable for operating environments with limited space in rural areas.

[0066] 2. Modular design facilitates maintenance: The feed hopper 106 is independently separated. By opening the hopper door 107, the internal feeding hopper 62 and screw conveyor 61 can be inspected and cleaned (such as removing fuel clumps and blade entanglement) without disassembling other areas of the outer shell 1, thus shortening maintenance time.

[0067] IV. Adaptable to multiple fuel types, enhancing equipment versatility

[0068] The conveying capacity of the screw conveyor 61 can be adapted to different fuel particle sizes (such as biomass pellets, small coal lumps, and firewood shreds) by adjusting its rotation speed. Combined with the large-diameter design of the hopper 62 (to prevent large fuel lumps from clogging), the equipment can adapt to various fuel types without modification. Compared to traditional "single-fuel dedicated furnaces," this invention improves fuel adaptability, allowing for flexible selection based on fuel supply conditions in different regions, reducing user dependence on specific fuels, and expanding the equipment's application range.

[0069] In this embodiment, two upper dust baffles 108 are installed on the inner top wall of the dust settling chamber 104, and a lower dust baffle 109 is installed on the inner bottom wall of the dust settling chamber 104, with the lower dust baffle 109 located between the two upper dust baffles 108. The flue gas drawn into the dust settling chamber 104 settles to the bottom of the dust settling chamber 104 due to the obstruction of the upper and lower dust baffles 108 and 109. The bottom inlet of the exhaust pipe 5 is far from the outlet of the hot air pipe 3, so that the flue gas is dusted and then heat-conducted by the superconducting heat pipe 4 before entering the exhaust pipe 5, thereby reducing the emission of dust and residual heat. A dust discharge door 110 is provided on the outer casing 1 near the bottom of the dust settling chamber 104. By opening the dust discharge door 110, dust inside the dust settling chamber 104 can be discharged.

[0070] This invention significantly improves dust suppression and waste heat utilization efficiency by installing an upper dust baffle 108 and a lower dust baffle 109 in the dust suppression chamber 104, optimizing the position of the smoke inlet of the exhaust pipe 5, and adding an ash discharge door 110. The specific beneficial effects are as follows:

[0071] I. Significantly improve flue gas dust suppression efficiency and reduce equipment dust accumulation and wear.

[0072] 1. Labyrinth-style dust-blocking structure enhances settling effect: Two upper dust-blocking plates 108 and the middle lower dust-blocking plate 109 form an "alternating" dust-blocking structure, forcing the flue gas entering the dust settling chamber 104 to undergo multiple turns and flows before passing through. During this process, the flue gas velocity decreases, and dust settles after colliding with the dust-blocking plates under the action of inertia and gravity, improving dust settling efficiency and reducing the dust content of the flue gas exiting the dust settling chamber 104.

[0073] 2. Protect core components and extend lifespan: After being intercepted by the baffle plate, the dust content of the flue gas entering the superconducting heat pipe 4 area is greatly reduced, preventing dust from adhering to the outer wall of the superconducting heat pipe 4 and affecting heat transfer; at the same time, the flue gas inlet of the exhaust pipe 5 is far away from the air outlet of the hot air pipe 3, ensuring that the flue gas is fully dust-reduced before entering the exhaust pipe 5, reducing the risk of dust accumulation and blockage in the pipe, and extending the cleaning cycle of the exhaust pipe 5.

[0074] II. Deepen the recovery and utilization of waste heat to further reduce energy consumption.

[0075] 1. Extended flue gas heat exchange time: The tortuous flow path of the flue gas, blocked by the baffle plate, extends the residence time of the flue gas in the dust settling chamber 104, resulting in more thorough heat exchange with the superconducting heat pipe 4. The superconducting heat pipe 4 can absorb more flue gas heat from the furnace, which can increase the preheating temperature of the air in the clean heat chamber 103, further reducing the fuel consumption of the furnace body 2. In conjunction with the previous waste heat recovery design, it further improves the overall energy efficiency of the equipment.

[0076] 2. Prevent premature discharge of waste heat: The design of the flue gas inlet of the exhaust pipe 5 being far away from the waste heat outlet 32 ​​ensures that the flue gas must first pass through the superconducting heat pipe 4 for heat exchange before entering the exhaust pipe 5, avoiding the direct discharge of high-temperature flue gas that has not been fully heat-exchanged. This reduces the flue gas temperature at the outlet of the exhaust pipe 5, improves the utilization rate of waste heat, and reduces heat waste from the source.

[0077] III. Simplify dust removal operations and reduce maintenance costs

[0078] Dust settled at the bottom of the dust settling chamber 104 can be directly cleaned through the ash discharge door 110 on the outer casing 1 without disassembling the dust settling chamber or the superconducting heat pipe assembly. Operators only need to open the ash discharge door 110 to discharge the accumulated dust. With the guiding effect of the lower baffle plate 109 (which gathers the dust near the ash discharge door), the time for each dust cleaning is shortened, and maintenance efficiency is improved.

[0079] In this embodiment, please refer to Figure 4 and Figure 5 The outer circumferential surface of a section of the superconducting heat pipe 4 and the exhaust pipe 5 located inside the clean heat chamber 103 is equipped with heat dissipation fins 42. The heat dissipation fins 42 can be spiral fins or circular fins.

[0080] The present invention further enhances heat exchange efficiency by installing heat dissipation fins 42 (spiral fins or circular fins) on the outer peripheral surface of a section of the superconducting heat pipe 4 and the exhaust pipe 5 located in the clean heat chamber 103, resulting in the following significant beneficial effects:

[0081] I. Significantly increase the heat exchange area of ​​the net heating room and enhance the preheating effect.

[0082] 1. The heat exchange area increases exponentially: The spiral heat dissipation fins 42 are evenly distributed along the axial direction of the superconducting heat pipe 4 and the exhaust pipe 5, increasing the contact area between the pipes and the air inside the clean heat chamber 103. The furnace flue heat transferred by the superconducting heat pipe 4 and the furnace flue heat emitted by the exhaust pipe 5 can exchange heat with the air more fully, increasing the preheating temperature of the air inside the clean heat chamber 103 and saving fuel consumption for the subsequent heating stage of the heat-gathering chamber 101.

[0083] 2. Helical structure enhances airflow disturbance: The helical heat dissipation fins 42 create a vortex effect when air flows, breaking down the "boundary layer" thermal resistance on the pipe surface and increasing the heat exchange rate between the air and the fins. Compared to straight fins, helical fins can accelerate the temperature rise of the air in the cleanroom, achieving preheating more quickly during equipment startup and shortening the overall hot air preparation cycle.

[0084] II. Improve waste heat utilization efficiency and enhance energy-saving effects

[0085] 1. More complete release of waste heat from superconducting heat pipe: The heat dissipation fins 42 increase the heat dissipation efficiency of superconducting heat pipe 4 in clean heat chamber 103, making the condensation and heat release of superconducting medium 41 inside the pipe more thorough, avoiding the problem of "residual heat" caused by insufficient heat dissipation in traditional bare pipe structure, improving the heat exchange efficiency of superconducting heat pipe 4, further recovering the waste heat from the dryer exhaust, and further reducing the dependence on the combustion heat of furnace body 2.

[0086] 2. Secondary heat recovery from furnace flue gas: The heat dissipation fins 42 on the outside of the flue gas pipe 5 can absorb furnace flue gas heat to the maximum extent, which can reduce the flue gas temperature at the flue gas outlet and improve the utilization rate of furnace flue gas heat. This additional recovered heat can further increase the preheating temperature of the clean heat chamber air by 5℃-10℃, forming a synergy with the waste heat recovery of the superconducting heat pipe, further improving the overall energy efficiency of the equipment.

[0087] III. Optimize the temperature distribution in the clean heating room to ensure the stability of hot air.

[0088] 1. The uniform distribution of heat dissipation fins 42 allows the heat from the superconducting heat pipe 4 and the exhaust pipe 5 to be more evenly diffused to all areas of the clean heating chamber 103, avoiding the "hot spot" problem caused by local heat concentration in traditional bare pipe structures. This reduces the temperature deviation of the air inside the clean heating chamber, making the preheated air temperature entering the heat-concentrating chamber 101 more stable. Combined with the heating function of the furnace body 2, this ensures uniform heating during grain drying and reduces quality differences caused by local overheating or insufficient temperature.

[0089] IV. The structure is compact and highly adaptable, without increasing the size of the equipment.

[0090] 1. High efficiency in utilizing the clean heat chamber space: The spiral fins 42 are tightly wound around the outer periphery of the pipe, maximizing the heat exchange area within the limited space of the clean heat chamber 103. This improves heat exchange efficiency without expanding the volume of the clean heat chamber, and the overall structure of the equipment remains compact.

[0091] 2. Adaptable to various pipe diameters and installation scenarios: The heat dissipation fins 42 can be flexibly designed to fit the diameters of the superconducting heat pipe 4 and the exhaust pipe 5. Whether it is a thin-diameter superconducting heat pipe or a thick-diameter exhaust pipe, efficient heat dissipation can be achieved through the fins. At the same time, the spiral structure facilitates mass production and installation, bringing significant energy-saving benefits and outstanding cost-effectiveness.

[0092] V. Extend pipeline service life and reduce maintenance costs

[0093] The heat dissipation fins 42 reduce the wall temperature of the superconducting heat pipe 4 and the exhaust pipe 5 by increasing the heat dissipation area, thereby reducing the aging damage (such as oxidation and creep) of the pipe material caused by high temperature. Combined with the high temperature and corrosion resistant materials used for the fins, the service life of the superconducting heat pipe 4 and the exhaust pipe 5 is extended, reducing maintenance costs and downtime losses caused by pipe replacement.

[0094] In this embodiment, the superconducting heat pipe biomass hot air furnace of the present invention further includes a converging hood 7 and a chimney 8. The converging hood 7 is installed on the outer shell 1 and covers the exhaust ports of multiple exhaust pipes 5. The chimney 8 is connected to the converging hood 7. During the process of the converging hood 7 covering the exhaust ports of multiple exhaust pipes 5, the low-temperature flue gas discharged from the exhaust pipes can be temporarily retained, allowing the small amount of residual heat in the flue gas to form a weak heat exchange with the air at the top of the clean heat chamber 103, while avoiding the "instantaneous loss" of heat when the flue gas is directly discharged. Through this design, additional furnace flue heat can be recovered, further increasing the preheating temperature of the air in the clean heat chamber 103, which synergizes with the heat exchange effect of the heat dissipation fins 42, further improving the overall energy efficiency of the equipment.

[0095] In this embodiment, an exhaust fan 9 is installed between the converging hood 7 and the chimney 8 to regulate the gas flow from the furnace body 2 → hot air pipe 3 → dust settling chamber 104 → exhaust pipe 5 → converging hood 7 → chimney 8. The exhaust fan 9 is fixed between the flue gas outlet at the top of the converging hood 7 and the inlet at the bottom of the chimney 8 using a flange connection. A high-temperature resistant sealing gasket is installed at the connection to ensure no gas leakage. The speed of the exhaust fan 9 can be adjusted by a frequency converter, with a speed range of 500-1500 r / min. The exhaust power can be dynamically adjusted according to the combustion intensity of the furnace and the flue gas resistance of the dust settling chamber. The speed of the exhaust fan 9 can be linked to the combustion state of the furnace body 2 (optional temperature sensor feedback control): when the furnace temperature rises and the flue gas volume increases, the exhaust fan 9 automatically increases its speed; when the furnace is in a low-load combustion or shutdown state, the exhaust fan 9 reduces its speed or stops operating, achieving energy-saving operation.

[0096] Installing an exhaust fan 9 between the converging hood 7 and the chimney 8 has the following beneficial effects:

[0097] I. Enhance flue gas exhaust power and solve the problem of resistance loss: The baffle structure of the dust settling chamber 104 will generate a certain flue gas resistance. The exhaust fan 9 provides active exhaust power to prevent flue gas from lingering in the dust settling chamber 104, reduce secondary dust re-entrainment, and at the same time reduce the furnace back pressure. This enhances the gas flow from the furnace body 2 → hot air pipe 3 → dust settling chamber 104 → exhaust pipe 5 → converging hood 7 → chimney 8, ensuring complete combustion of fuel and rapidly transferring the heat in the furnace body 2 to the dust settling chamber 104 and conducting heat transfer with the superconducting heat pipe 4.

[0098] 2. Optimize waste heat recovery efficiency: By adjusting the fan speed, the residence time of flue gas in the dust settling chamber 104 and the exhaust pipe 5 can be controlled, so that the heat exchange between the furnace flue gas and the air in the superconducting heat pipe 4 and the clean heat chamber 103 is more complete, which can further increase the preheating temperature of the clean heat chamber air by 3-8℃, and further reduce fuel consumption.

[0099] 3. Improve the adaptability of equipment to operating conditions: When the fuel type is changed (such as from biomass pellets to coal blocks) or the furnace combustion load changes, the fan speed can be adjusted to match the amount of flue gas generated, so as to avoid problems such as poor flue gas emission or insufficient waste heat recovery, and expand the range of applicable operating conditions of the equipment.

[0100] IV. Simplified maintenance and operation: The active smoke exhaust function of the smoke exhaust fan 9 can reduce the adhesion of dust in the smoke exhaust pipe 5 and the collection hood 7, and extend the dust cleaning cycle; the fan adopts a modular design, which can be disassembled and repaired separately without affecting the operation of other components.

[0101] Please see Figure 6 and Figure 7The present invention also provides an energy-saving and safe grain drying system using the aforementioned superconducting heat pipe biomass hot air furnace, comprising a superconducting heat pipe biomass hot air furnace 100, a dryer 200, an air inlet pipe 300, an air outlet pipe 400, and an exhaust fan 500. The hot air inlet 102 of the superconducting heat pipe biomass hot air furnace 100 is connected to the hot air inlet of the dryer 200 via the air inlet pipe 300. The exhaust outlet of the dryer 200 is connected to the exhaust pipe 400 and the exhaust fan 500. This forms a hot air utilization process from the superconducting heat pipe biomass hot air furnace 100 → air inlet pipe 300 → dryer 200 → exhaust fan 500 → exhaust pipe 400.

[0102] The dryer 200 includes a housing 201 and an elevator 202. The housing 201, from top to bottom, comprises a grain storage chamber, a drying section, a grain discharge mechanism, and a discharge hopper. A superconducting heat pipe biomass hot air furnace 100 is used to heat the drying section. The elevator 202 is located on one side of the housing 201, extending upwards from the discharge hopper to the top of the grain storage chamber to achieve cyclical transport of the grain. The grain to be dried falls from the bottom of the storage chamber into the drying section for drying, then sequentially falls from the bottom of the drying section into the grain discharge mechanism and the discharge hopper. The elevator 202 then reloads the grain from the discharge hopper back into the storage chamber, forming a cyclical transport of the grain. The grain undergoes several cyclic drying processes to reach the specified moisture content. The specific structure and working principle of the dryer 200 are existing technologies and will not be described in detail here.

[0103] The energy-saving and safe grain drying system of this invention achieves the core objectives of efficient heat utilization, uniform grain drying, and continuous and controllable operation through the integrated closed-loop design of superconducting heat pipe biomass hot air furnace 100, dryer 200, air inlet pipe 300, air outlet pipe 400 and exhaust fan 500, combined with the circulating conveying structure of the elevator 202 built into the dryer 200. It comprehensively solves the technical defects of traditional drying systems such as large heat loss, uneven drying, high energy consumption and cumbersome operation, and has significant energy-saving and environmental protection benefits and practical value.

[0104] I. Closed-loop utilization of heat, resulting in significant energy-saving and environmental benefits.

[0105] The system forms a closed-loop hot air path: "superconducting heat pipe biomass hot air furnace 100 → air inlet pipe 300 → dryer 200 → exhaust fan 500 → exhaust pipe 400". The sealed connection between the air inlet pipe 300 and the hot air inlet of the dryer 200 reduces heat loss during hot air transportation. The superconducting heat pipe biomass hot air furnace 100 itself has a furnace flue heat recovery function, providing a high-temperature and stable heat source for the drying section. Combined with the closed-loop circulation, the hot air fully releases heat during the drying process, effectively reducing heat loss. At the same time, the exhaust fan 500 provides stable suction power, ensuring smooth circulation of hot air, avoiding energy waste caused by local hot air stagnation, further reducing fuel consumption, and indirectly reducing emissions of harmful gases such as CO2, achieving a dual improvement in energy saving and environmental protection.

[0106] II. Grain recycling drying ensures uniform and controllable moisture content.

[0107] The elevator 202 of the dryer 200 extends from the discharge hopper of the housing 201 to the top of the grain storage chamber, forming a circular conveying path for the grain: "grain storage chamber → drying section → grain discharge mechanism → discharge hopper → elevator 202 → grain storage chamber". The grain to be dried passes through the drying section multiple times, continuously receiving stable heat from the superconducting heat pipe biomass hot air furnace 100, avoiding the problem of "over-drying of the upper layer of grain and incomplete drying of the lower layer of grain" caused by traditional single drying. By adjusting the number of cycles, the final moisture content of the grain can be precisely controlled, significantly improving the quality and pass rate of the dried product, and making it suitable for grain processing scenarios with strict moisture content requirements.

[0108] III. Improved operational efficiency and enhanced continuous operation capability

[0109] The high-efficiency heating characteristics of the superconducting heat pipe biomass hot air furnace 100, combined with the closed-loop hot air circulation system, enable the drying section of the dryer 200 to quickly reach the target temperature and maintain stability, shortening the drying cycle of a single batch of grain. The elevator 202 realizes automatic circulation and conveying of grain, replacing the traditional manual turning or transfer operation, avoiding operation interruption and greatly improving labor efficiency. The layered design of the box 201, consisting of "grain storage chamber → drying section → grain discharge mechanism → discharge hopper", ensures smooth grain conveying without the risk of material blockage, meeting the needs of large-scale continuous drying operations and greatly improving operation efficiency.

[0110] IV. Wide structural adaptability and convenient operation and maintenance.

[0111] The system's components (superconducting heat pipe biomass hot air furnace 100, dryer 200, air inlet pipe 300, air outlet pipe 400, and exhaust fan 500) have a simple connection method, compact layout, and small footprint, making them easy to install in fields, granaries, and other locations with limited space. The layered structure of the dryer 200 and the integrated design of the elevator 202 eliminate the need for additional transfer equipment, reducing equipment investment costs. By adjusting the wind speed of the exhaust fan 500, the conveying frequency of the elevator 202, and the heating intensity of the superconducting heat pipe biomass hot air furnace 100, it can adapt to the drying needs of various grains such as corn, wheat, rice, and soybeans. It is flexible in operation, and the simple structure of each component results in low maintenance costs.

[0112] In summary, this system achieves breakthroughs in heat utilization efficiency, drying uniformity, operational continuity, and adaptability through the synergistic effect of the high-efficiency heating of the superconducting heat pipe biomass hot air furnace 100, the energy-saving design of the closed-loop hot air circulation, and the circulating drying structure of the elevator 202. It effectively solves the core technical defects of traditional grain drying systems, reduces energy consumption and environmental pollution, and improves drying quality and operational efficiency. It is suitable for grain drying operations in large-scale agricultural production and has extremely high practical value and promising prospects for promotion.

[0113] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying importance; the terms "bottom surface" and "top surface," "inner" and "outer" respectively refer to the geometric direction toward or away from a specific component.

[0114] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0115] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A superconducting heat pipe type biomass hot air furnace, characterized in that, It includes an outer shell (1), a furnace body (2), a hot air pipe (3), a superconducting heat pipe (4), and a flue pipe (5); The outer shell (1) is divided by a partition to form a heat-gathering chamber (101), and a hot air delivery port (102) communicating with the heat-gathering chamber (101) is provided on the outer shell (1). The furnace body (2) is installed inside the heat collection chamber (101), and a furnace chamber for fuel combustion is formed inside the furnace body (2); The hot air duct (3) is connected to the furnace body (2) and located inside the heat collection chamber (101); Inside the outer shell (1), a tube plate (11) is installed at the air outlet of the hot air pipe (3). The tube plate (11) divides the interior of the outer shell (1) into a clean heat chamber (103) and a dust settling chamber (104). One end of the clean heat chamber (103) is provided with an air inlet (111), and the other end is provided with a hot air outlet (105) that communicates with the heat collection chamber (101). One end of the hot air pipe (3) is connected to the furnace body (2), and the other end is connected to the dust settling chamber (104); The tube sheet (11) has multiple tube holes, and the superconducting heat pipe (4) is installed through each tube hole. One end of the superconducting heat pipe (4) is located in the heat purification chamber (103), and the other end is located in the dust settling chamber (104). The superconducting heat pipe (4) is filled with a superconducting medium (41). The exhaust pipe (5) is installed in the clean heat chamber (103). The bottom smoke inlet of the exhaust pipe (5) is connected to the dust settling chamber (104), and the top smoke outlet of the exhaust pipe (5) is connected to the outside.

2. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, The furnace body (2) and the hot air pipe (3) are connected to the outer wall surface with uniformly arranged heat dissipation fins (21).

3. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, It also includes a fuel feeding device (6) for adding fuel to the furnace body (2), the fuel feeding device (6) including a screw conveyor (61), a feeding hopper (62) and a discharging hopper (63). The screw conveyor (61) is installed on the side wall of the furnace body (2), the feeding hopper (62) is installed at the feeding end of the screw conveyor (61), and the discharging hopper (63) is installed at the discharging end of the screw conveyor (61) and communicates with the inside of the furnace body (2). The screw conveyor (61), the feeding hopper (62) and the unloading hopper (63) are all installed inside the outer casing (1).

4. The superconducting heat pipe biomass hot air furnace according to claim 3, characterized in that, The screw conveyor (61) and the feeding hopper (62) are located in the feeding bin (106) formed by the separation inside the outer shell (1). The feeding bin (106) has a door (107) at the top, and the top opening of the feeding hopper (62) corresponds to the position of the door (107).

5. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, The dust settling chamber (104) has two upper dust plates (108) installed on its inner top wall and a lower dust plate (109) installed on its inner bottom wall. The lower dust plate (109) is located between the two upper dust plates (108). The bottom smoke inlet of the exhaust pipe (5) is far from the air outlet of the hot air pipe (3); A dust discharge door (110) is provided on the outer shell (1) near the bottom of the dust chamber (104).

6. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, The outer periphery of the section of the superconducting heat pipe (4) and the exhaust pipe (5) located in the clean heat chamber (103) is equipped with heat dissipation fins (42).

7. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, It also includes a converging hood (7) and a chimney (8), wherein the converging hood (7) is installed on the outer shell (1) and covers the exhaust ports of the multiple exhaust pipes (5), and the chimney (8) is connected to the converging hood (7).

8. The superconducting heat pipe biomass hot air furnace according to claim 7, characterized in that, A flue fan (9) is installed between the converging hood (7) and the chimney (8) to regulate the gas flow from the furnace body (2) → hot air pipe (3) → dust settling chamber (104) → flue pipe (5) → converging hood (7) → chimney (8).

9. The superconducting heat pipe biomass hot air furnace according to claim 1, characterized in that, The outer shell (1) is a double-shell structure, and the double-shell structure is filled with heat insulation material.

10. An energy-saving and safe grain drying system, characterized in that, The invention includes a superconducting heat pipe biomass hot air furnace (100), a dryer (200), an air inlet pipe (300), an air outlet pipe (400), and an exhaust fan (500) as described in any one of claims 1 to 9. The hot air inlet (102) of the superconducting heat pipe biomass hot air furnace (100) is connected to the hot air inlet of the dryer (200) through the air inlet pipe (300), and the exhaust port of the dryer (200) is connected to the exhaust pipe (400) and the exhaust fan (500).

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