Double-cone rotary dryer with gas adsorption function

Abstract

The application discloses a double-cone rotary dryer with gas adsorption function and relates to the technical field of dryers. The double-cone rotary dryer comprises a supporting mechanism, a blowing and sucking mechanism, a rotating mechanism and a temperature control mechanism, wherein the rotating mechanism and the supporting mechanism are rotationally connected. The blowing and sucking mechanism comprises an adsorption assembly, a blowing assembly and a blowing and sucking pipe group, and the adsorption assembly and the blowing assembly are communicated with the blowing and sucking pipe group. The blowing and sucking pipe group comprises a blowing pipe, a sucking pipe, a blowing and sucking head and a dustproof net, the blowing and sucking head is communicated with the blowing pipe and the sucking pipe respectively, the dustproof net is connected with the blowing and sucking head, the blowing pipe is communicated with the blowing assembly, the sucking pipe is communicated with the adsorption assembly, the adsorption assembly and the blowing assembly are connected with the supporting mechanism, and the blowing and sucking pipe group is located in the rotating mechanism. The upper side of the blowing and sucking head is used for exhausting air, so that the drying efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of dryer technology, specifically a double-cone rotary dryer with gas adsorption function. Background Technology

[0002] The double-cone rotary dryer, a typical vacuum drying equipment integrating mixing and drying, has broad development prospects in the pharmaceutical, fine chemical, and food processing fields due to its ability to provide a large heat exchange area and uniform material tumbling. As industrial manufacturing shifts towards high precision and low energy consumption, modern drying processes place higher demands on equipment. It not only requires the ability to handle heat-sensitive and easily oxidized special materials, but also necessitates maintaining extremely high exhaust flow and thermal energy utilization under high vacuum conditions, achieving fully automated and precise temperature control throughout the entire process.

[0003] In existing technologies, traditional double cone dryers typically employ a simplified double-layer jacket structure. The heating medium is indirectly transferred by being pumped into the jacket by an external circulation pump. The supporting structure is mostly a general-purpose column frame, and the internal filtration device is mostly a statically installed metal filter screen.

[0004] However, existing technologies still have the following shortcomings. First, fixed dust screens are easily covered and gradually clogged by fine dust particles during the drying process, causing a sharp drop in the system vacuum and making automatic cleaning difficult without stopping the machine. Second, when processing materials with high moisture content, the vacuum pipeline is prone to temperature difference condensation, causing condensate to flow back into the drying chamber along the pipe wall, resulting in secondary contamination of the material. Therefore, those skilled in the art have provided a double-cone rotary dryer with gas adsorption function to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a double cone rotary dryer with gas adsorption function to solve the problem of low drying efficiency in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The double cone rotary dryer includes a support mechanism, a blowing and suction mechanism, a rotating mechanism, and a temperature control mechanism, with the rotating mechanism and the support mechanism being rotatably connected. The blowing and suction mechanism includes an adsorption component, a purging component, and a blowing and suction tube assembly, with both the adsorption component and the purging component connected to the blowing and suction tube assembly; The blow-suction tube assembly includes a blow tube, a suction tube, a blow-suction head, and a dust screen. The blow-suction head is connected to both the blow tube and the suction tube, and the dust screen is connected to the blow-suction head. The purge pipe is connected to the purge assembly, the suction pipe is connected to the adsorption assembly, and both the adsorption assembly and the purge assembly are connected to the support mechanism. The purge pipe assembly is located inside the rotating mechanism, and the upper part of the purge head is used for exhaust.

[0007] By adopting the above technical solution, the support mechanism consists of a rotating frame with a triangular cross-section mounted on the connecting frame. The rotating mechanism drives the transmission belt via a rotating motor, causing the double-cone drying chamber, which is shaped like a double cone, to rotate on the rotating frame. After the material enters through the feed valve, the valve cover is closed, and the real-time status is monitored by pressure and temperature sensors on it. After the temperature control mechanism is activated, the hot medium in the hot flow chamber enters the S-shaped flow channel formed by the flow limiting plate through the hot flow pipe from the hot flow inlet for uniform heating, and then flows back to the cold flow chamber through the cold flow return port and the cold flow pipe surrounding the hot flow pipe. At the same time, the blowing and suction mechanism generates negative pressure through the vacuum pump and gas-liquid separator of the adsorption component, and uses the suction pipe and the suction hole below the blowing head to extract water vapor. Meanwhile, the blower of the purging component sends the low-density inert gas in the gas storage tank, which is preheated by the preheater, into the purging pipe surrounding the suction pipe, and is sprayed out through the blow hole above the blowing head to clean the dust on the dust screen. By switching the magnetic poles of the electromagnetic block and the magnetic block and the reset action of the switching elastic element, the magnetic block is guided to slide on the suction pipe, thus achieving the switching of the air path between the suction pipe and the purge pipe. The S-shaped flow channel significantly improves the heat exchange area and efficiency. Furthermore, the dynamic coordination of the blowing and suction structure effectively solves the problem of dust screen clogging, ensuring rapid drying under high vacuum. Finally, the dried material is safely discharged through the discharge valve.

[0008] The blow-suction tube assembly also includes a switching electromagnetic block, a switching elastic element, and a switching magnetic block. The switching elastic element is respectively installed on the switching electromagnetic block and the switching magnetic block, and the magnetic poles of the switching electromagnetic block and the switching magnetic block repel each other for transmission. The purge pipe is equipped with a trapping bend, and the end of the purge pipe is inclined upwards. The switching electromagnetic block is installed on the suction tube, and the switching magnetic block and the suction tube are slidably connected. The blow-and-suction head is equipped with a blow hole and a suction hole. The blow hole is located above the blow-and-suction head, and the suction hole is located below the blow-and-suction head. The blow hole is used to blow away dust from the dustproof net.

[0009] By adopting the above technical solution, the switching of the gas path and fluid control of the suction pipe and the purge pipe are realized through the cooperation of the internal components of the suction pipe assembly. The switching electromagnetic block is firmly installed on the suction pipe. When it is energized and generates a magnetic field, it drives the switching magnetic block, which is slidably connected to the suction pipe, to move radially along the pipe body by utilizing the principle of repulsion transmission with the magnetic poles of the switching magnetic block. At the same time, the switching elastic element installed between the switching electromagnetic block and the switching magnetic block is compressed or stretched to accumulate reset potential energy, so that the gas can purge the pipe simultaneously up and down. During the suction stage, the elastic return of the switching elastic element guides the switching magnetic block to reset, realizing the precise opening and closing of the gas path. By intercepting the bend, gas backflow is prevented, and water droplets formed by water vapor due to temperature changes flow back into the double cone drying chamber. This realizes the automatic switching of dust interception and gas emission path, significantly reduces the maintenance frequency of the suction pipe assembly, and ensures the stability of the vacuum environment in the drying chamber.

[0010] The purging assembly includes a preheater, a pump, and a gas storage tank. The preheater and the gas storage tank are connected, and the pump and the gas storage tank are connected. The gas storage tank is used to store inert gas, which has a density less than that of air. The purge pipe is fitted around the suction pipe, and the air pump and the purge pipe are connected.

[0011] By adopting the above technical solution, the purge tube is coaxially sleeved around the suction tube. This sleeve structure saves space while using the outer airflow to provide thermal shielding protection for the inner pipeline. The purge assembly can use helium as the specific inert gas (helium density is about 0.1786 kg / m³, much smaller than air density) and store it in a gas storage tank. The helium in the gas storage tank is first preheated by a preheater connected to it to ensure that the gas temperature matches the environment inside the drying chamber. Then, the high-pressure power generated by the air pump connected to both the gas storage tank and the purge tube is used to continuously force the heated helium into the annular channel between the purge tube and the suction tube. Its working principle lies in utilizing the extremely low density of helium, which allows it to float rapidly upwards and evenly penetrate the filter screen after entering the rotating mechanism. Combined with the heat energy provided by the preheater, it prevents condensation caused by heat exchange. The effect is that by using helium, which is lightweight and stable, as the purging medium, not only is oxidation and deterioration of the material effectively avoided during the drying process, but its high permeability also significantly improves the removal efficiency of fine dust on the dustproof screen. At the same time, the sleeve structure effectively reduces the risk of condensation of steam in the suction pipe due to temperature difference, ensuring the long-term smooth and efficient operation of the purging system.

[0012] The adsorption assembly includes a gas-liquid separator and a vacuum pump, with the vacuum pump and the gas-liquid separator connected in series. The vacuum pump and suction pipe are connected.

[0013] By adopting the above technical solution, the adsorption component, as the core unit for maintaining the system's vacuum environment and media recovery, has its vacuum pump physically connected to the gas-liquid separator and the suction pipe, forming a complete negative pressure loop from the power source to the execution end. Its working process and principle are as follows: starting the vacuum pump generates continuous negative pressure suction, which draws away the high-temperature water vapor, low-density inert gas, and trace dust mixture from the double-cone drying chamber through the connected suction pipe. When these mixed gases enter the gas-liquid separator, the gas and liquid phases are separated using the principle of internal volume expansion or centrifugal collision, and the condensed liquid is retained in the collection area at the bottom of the separator. The achieved effect is that the adsorption component, through the powerful suction of the vacuum pump, ensures that the drying environment is always in a high vacuum state. Combined with the pretreatment function of the gas-liquid separator, it effectively prevents liquid water from entering the vacuum pump and causing pump damage or a decrease in vacuum, thereby achieving efficient purification of the media discharged from the suction pipe and significantly improving the stability of the entire machine's operation and the efficiency of water vapor discharge.

[0014] The rotating mechanism includes a double-cone drying chamber, a flow restrictor, a pressure sensor, a temperature sensor, a discharge valve, a feed valve, a valve cover, a rotating motor, and a transmission belt. The double-cone drying chamber is shaped like a double cone. The flow restrictor is installed on the double-cone drying chamber. The pressure sensor and temperature sensor are both installed on the valve cover. The valve cover and the double-cone drying chamber are hinged. The discharge valve is installed on the double-cone drying chamber. The rotating motor and the transmission belt are connected for transmission. The transmission belt is connected for transmission to the double-cone drying chamber.

[0015] By adopting the above technical solution, the rotating mechanism achieves efficient dynamic drying of materials through the coordinated operation of its components: a double-cone drying chamber, shaped like a double cone, serves as the core container and is rotatably connected to the support mechanism. Materials are fed into the chamber through a feed valve and then sealed by a valve cover hinged to the double-cone drying chamber. Pressure and temperature sensors mounted on the valve cover are used to acquire real-time vacuum and temperature data within the chamber and feed them back to the control system. Its working process and principle are as follows: a rotating motor mounted on the support mechanism starts, and its output power is smoothly transmitted to the double-cone drying chamber via a transmission belt, driving it to continuously rotate relative to the support mechanism. This causes the material to tumble and renew its heated surface under gravity. During this process, a flow-limiting plate installed inside the double-cone drying chamber guides the material's sliding path in an orderly manner, preventing material accumulation at the top of the cones and enhancing heat exchange efficiency. The achieved effect is that the mechanical transmission of the rotating motor and the drive belt realizes the stable rotation of the chamber. The precise cooperation of the feed valve, discharge valve and valve cover ensures the complete sealing of the drying process. With the uniform distribution effect of the flow limiting plate and the real-time parameter monitoring of the pressure sensor and temperature sensor, the uniformity of material drying and the safety of operation are greatly improved. Finally, the dried material is quickly unloaded through the discharge valve.

[0016] The area enclosed by the double cone drying oven and the flow restrictor is equipped with an S-shaped flow channel, which has a hot flow inlet and a cold flow return outlet. Both the hot flow inlet and the cold flow return outlet are connected to the temperature control mechanism.

[0017] By adopting the above technical solution, the double-cone drying oven and the internal flow-limiting plate are precisely welded or cast to form a continuous, turning S-shaped flow channel in the sandwich area. This flow channel serves as the main circulation path for the heat exchange medium and, together with the external temperature control mechanism, constitutes a closed-loop temperature control circulation system. When the drying operation starts, the temperature control mechanism injects the heating or cooling medium (such as heat transfer oil or hot water) into the circulation loop through the hot flow inlet on the S-shaped flow channel. Guided by the S-shaped flow channel, the medium is forced to flow fully along a wavy or serpentine trajectory across the entire outer wall of the double-cone drying oven, increasing the effective residence time and heat exchange stroke of the medium on the wall surface. After completing the heat transfer, the medium is finally discharged from the cold flow return port on the S-shaped flow channel and flows back to the temperature control mechanism through the pipeline for re-temperature adjustment. The effect achieved is that the S-shaped flow channel formed by forcibly changing the direction of the fluid through the flow restrictor effectively eliminates the heat exchange blind zone and greatly increases the heat exchange area. Combined with the directional guidance of the hot flow inlet and the cold flow return outlet, it ensures the high uniformity and efficiency of the material heating in the double cone drying oven, and significantly improves the equipment's ability to accurately control the temperature fluctuations of sensitive materials.

[0018] The temperature control mechanism includes a hot flow chamber, a cold flow chamber, a hot flow tube, and a cold flow tube. The hot flow chamber and the hot flow tube are connected, and the cold flow chamber and the cold flow tube are connected. The hot flow pipe is connected to the hot flow inlet, and the cold flow pipe is connected to the cold flow return port.

[0019] By adopting the above technical solution, the temperature control mechanism achieves precise temperature regulation of the material through a closed-loop circulation of the medium. The hot flow chamber and cold flow chamber, as the core of heat supply and recovery, are stably installed on the support structure to reduce vibration during operation, and establish fluid loops with the rotating drying chamber through hot and cold flow pipes, respectively. The preheated medium in the hot flow chamber is pressurized into the connected hot flow pipe and injected into the heat exchange channel of the double-cone drying chamber through the hot flow inlet, uniformly transferring heat to the material. After heat exchange, the cooled medium is discharged from the cold flow return port and guided to the cold flow chamber for collection and reheating through the connected cold flow pipe. The achieved effect is that the heating path formed by the hot flow chamber, hot flow pipe, and hot flow inlet, and the return path formed by the cold flow return port, cold flow pipe, and cold flow chamber, ensures efficient and stable circulation of the heat medium between the support structure and rotating components, effectively avoiding energy obstruction during heat exchange and significantly improving the system's control accuracy of the drying temperature and energy utilization rate.

[0020] The cold flow tube is installed around the hot flow tube, and both the hot flow box and the cold flow box are located below the cold flow tube.

[0021] By adopting the above technical solution, the cold flow tube is coaxially sleeved around the hot flow tube to form a double-layer sleeve structure, and both the hot flow chamber and the cold flow chamber are arranged in the support position below the cold flow tube. Its working process and principle are as follows: the high-temperature hot medium is transferred to the dryer in the inner hot flow tube, while the return medium after heat exchange flows back in the opposite direction through the outer cold flow tube. The outer fluid acts as a natural thermal insulation shield, effectively suppressing the large-scale loss of heat energy from the inner hot flow tube to the outside. At the same time, since the hot flow chamber and the cold flow chamber are both located at a low position under gravity below the cold flow tube, the return medium can be more smoothly collected into the corresponding chamber under the dual drive of pressure difference and gravity. The effect achieved is that the pipeline self-insulation function is realized through this special coaxial sleeve layout, which significantly improves the thermal efficiency of the temperature control system. The low-positioned hot flow chamber and cold flow chamber ensure the stability of the medium circulation and avoid the interference of backflow accumulation on the temperature control accuracy.

[0022] The support mechanism includes a rotating frame and a connecting frame. The rotating frame is mounted on the connecting frame, and the cross-section of the rotating frame is triangular. The rotating frame and the double cone drying oven are rotatably connected. The rotating frame is also securely connected to the gas-liquid separator, vacuum pump, preheater, air pump, gas storage tank, rotating motor, hot flow chamber and cold flow chamber respectively.

[0023] By adopting the above technical solution, the support mechanism provides overall ground support through the connecting frame, and the rotating frame installed on it adopts a triangular cross-section design to construct extremely high structural stability and seismic resistance. The double-cone drying chamber is rotatably connected to this rotating frame, forming the core of dynamic drying. At the same time, all power and control components of the system, including the preheater, air pump, air tank, hot flow chamber, cold flow chamber, gas-liquid separator, and vacuum pump, are all firmly connected to the rotating frame, forming a highly integrated functional module with the frame. Its working principle is to utilize the triangular stable geometry of the rotating frame to provide a stable rigid carrier for the high-speed rotating double-cone drying chamber and the high-frequency operating vacuum pump and air pump. At the same time, by centrally arranging the hot flow chamber, cold flow chamber, preheater, air tank, and gas-liquid separator within the rotating frame, the connection pipelines between each component and the drying chamber are shortened to the greatest extent. The achieved result is that, through the high-strength structural cooperation between the rotating frame and the connecting frame, the modular and compact installation of the functional components of the whole machine is realized. This not only significantly reduces mechanical wear caused by vibration, but also effectively reduces the transmission loss of heat energy and vacuum pressure due to the greatly shortened pipeline, ensuring the long-term stable operation and efficient operation of the double cone dryer under complex working conditions.

[0024] Compared with the prior art, the beneficial effects of the present invention are: This invention automates the switching between purging and suction paths by incorporating a switching electromagnetic block, a switching elastic element, and a sliding magnetic block on the suction tube, utilizing the principle of magnetic pole repulsion. Combined with a unique trapping bend on the purging tube, it effectively blocks gas backflow, preventing water droplets caused by temperature differences from seeping back into the double-cone drying chamber. This unique non-contact magnetic drive structure not only avoids the mechanical wear of traditional valve operations but also ensures the precise opening and closing of the suction and blowing holes on the suction head at different drying stages, improving the reliability of cleaning dust from the dust filter from a fundamental mechanical logic perspective and ensuring the long-term stability of the vacuum environment. The layout of the purging tube coaxially sleeved around the suction tube utilizes the outer airflow to provide thermal shielding for the inner pipeline, significantly reducing the risk of water vapor condensation and scaling. Through a combination of a preheater, a pump, and a gas storage tank, preheated helium gas with a density much lower than water vapor is introduced. Its extremely high upward buoyancy and physical permeability allow the airflow to evenly penetrate the dust filter, achieving efficient removal of fine dust. This mechanical design, based on density differences and coaxial insulation, prevents material oxidation and deterioration while leveraging the high permeability of helium to enhance the expulsion of water vapor, completely solving the technical problem of easy blockage of the exhaust channel under complex operating conditions. The continuous S-shaped flow channel formed by the flow-limiting plate within the double-cone drying chamber significantly extends the heat exchange path and eliminates heat exchange blind spots. Combined with the gravity recirculation design of the cold flow tube sleeved with the hot flow tube and the low-positioned chamber, efficient utilization of thermal energy is achieved. The support mechanism uses a triangular cross-section rotating frame, tightly integrating the vacuum pump, gas-liquid separator, temperature control chamber, and other power components into one unit, significantly shortening the pipeline transmission distance and reducing pressure and heat loss. This structure not only enhances the shock resistance rigidity of the equipment during rotation but also ensures the stability of heat flow and airflow circulation under dynamic tumbling conditions through a compact parts arrangement, significantly improving the uniformity of the drying operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the blowing and suction mechanism of the present invention; Figure 3 This is a schematic diagram of the blowing and suction tube assembly structure of the present invention; Figure 4 This is a schematic diagram of the structure of the curved section of the present invention; Figure 5 This is a schematic diagram of the switching magnetic block structure of the present invention; Figure 6 This is a schematic diagram of the adsorption component and purging component of the present invention; Figure 7 This is a schematic diagram of the rotating mechanism of the present invention; Figure 8 This is a schematic diagram of the S-shaped flow channel structure of the present invention.

[0026] In the diagram: 1. Support mechanism; 11. Rotating frame; 12. Connecting frame; 2. Blowing and suction mechanism; 21. Adsorption assembly; 211. Gas-liquid separator; 212. Vacuum pump; 22. Blowing assembly; 221. Preheater; 222. Air pump; 223. Gas storage tank; 23. Blowing and suction pipe assembly; 231. Blowing pipe; 2311. Retention bend; 232. Suction pipe; 233. Blowing and suction head; 2331. Blowing hole; 2332. Suction hole; 234. Dustproof net; 235. Switching electromagnetic block 236. Switching elastic element; 237. Switching magnetic block; 3. Rotation mechanism; 31. Double cone drying oven; 32. Flow limiting plate; 321. S-shaped flow channel; 3211. Hot flow inlet; 3212. Cold flow return port; 33. Pressure sensor; 34. Temperature sensor; 35. Discharge valve; 36. Feed valve; 37. Valve cover; 38. Rotation motor; 39. Drive belt; 4. Temperature control mechanism; 41. Hot flow chamber; 42. Cold flow chamber; 43. Hot flow pipe; 44. Cold flow pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: Figure 1 - Figure 8 As shown, the present invention provides a technical solution for a double-cone rotary dryer with gas adsorption function: The double cone rotary dryer includes a support mechanism 1, a blowing and suction mechanism 2, a rotating mechanism 3, and a temperature control mechanism 4. The rotating mechanism 3 and the support mechanism 1 are rotatably connected. The blowing and suction mechanism 2 includes an adsorption component 21, a purging component 22, and a blowing and suction tube assembly 23. The adsorption component 21 and the purging component 22 are both connected to the blowing and suction tube assembly 23. The blow-suction tube assembly 23 includes a blow-sweeping tube 231, a suction tube 232, a blow-suction head 233, and a dustproof net 234. The blow-suction head 233 is connected to the blow-sweeping tube 231 and the suction tube 232 respectively, and the dustproof net 234 is connected to the blow-suction head 233. The purge pipe 231 is connected to the purge assembly 22, the suction pipe 232 is connected to the adsorption assembly 21, the adsorption assembly 21 and the purge assembly 22 are both connected to the support mechanism 1, the purge pipe assembly 23 is located in the rotating mechanism 3, and the upper side of the purge head 233 is used for exhaust.

[0029] By adopting the above technical solution, the support mechanism 1 is composed of a rotating frame 11 with a triangular cross section installed on the connecting frame 12. The rotating mechanism 3 drives the transmission belt 39 through the rotating motor 38, which drives the double cone drying box 31 with a double cone shape to rotate on the rotating frame 11. After the material enters through the feed valve 36, the valve cover 37 is closed. The pressure sensor 33 and temperature sensor 34 on it are used to monitor the real-time status. After the temperature control mechanism 4 is activated, the heat medium of the heat flow box 41 enters the S-shaped flow channel 321 surrounded by the flow limiting plate 32 through the heat flow pipe 43 from the heat flow inlet 3211 for uniform heating, and then flows back to the cold flow box 42 through the cold flow return port 3212 and the cold flow pipe 44 surrounding the heat flow pipe 43. At the same time, the blowing and suction mechanism 2 generates negative pressure through the vacuum pump 212 and the gas-liquid separator 211 of the adsorption component 21, and uses the suction pipe 232 and the suction hole 2332 below the blowing head 233 to extract water vapor. Meanwhile, the air pump 222 of the blowing component 22 sends the low-density inert gas in the gas storage tank 223 to the blowing pipe 231 surrounding the suction pipe 232 after preheating by the preheater 221. The gas is then sprayed out through the blowing hole 2331 above the blowing head 233 to clean the dust on the dust screen 234. By switching the magnetic poles of the electromagnetic block 235 and the magnetic block 237 and the reset action of the switching elastic element 236, the magnetic block 237 is guided to slide on the suction pipe 232, thereby achieving the switching of the air path between the suction pipe 232 and the purge pipe 231. The heat exchange area and efficiency are significantly improved by the S-shaped flow channel 321. Furthermore, the dynamic coordination of the blowing and suction structure effectively solves the problem of easy clogging of the dust screen 234, ensuring rapid drying under high vacuum. Finally, the dried material is safely discharged through the discharge valve 35.

[0030] The blow-and-suction tube assembly 23 also includes a switching electromagnetic block 235, a switching elastic element 236, and a switching magnetic block 237. The switching elastic element 236 is respectively installed on the switching electromagnetic block 235 and the switching magnetic block 237, and the magnetic poles of the switching electromagnetic block 235 and the switching magnetic block 237 repel each other during transmission. The purge pipe 231 is provided with a retaining bend 2311, and the end of the purge pipe 231 is inclined upward; The switching electromagnetic block 235 is installed on the suction tube 232, and the switching magnetic block 237 is slidably connected to the suction tube 232. The blow-and-suction head 233 is provided with a blow hole 2331 and a suction hole 2332. The blow hole 2331 is located above the blow-and-suction head 233, and the suction hole 2332 is located below the blow-and-suction head 233. The blow hole 2331 is used to blow away dust on the dustproof net 234.

[0031] By adopting the above technical solution, the air path switching and fluid control of the suction tube 232 and the purge tube 231 are achieved through the cooperation of the internal components of the suction tube assembly 23. The switching electromagnetic block 235 is fastened to the suction tube 232. When it is energized and generates a magnetic field, it drives the switching magnetic block 237, which is slidably connected to the suction tube 232, to move radially along the tube body by utilizing the principle of repulsion transmission with the magnetic poles of the switching magnetic block 237. At the same time, the switching elastic element 236 installed between the switching electromagnetic block 235 and the switching magnetic block 237 is compressed or stretched. By accumulating and resetting potential energy, the gas can simultaneously purge the blowing tube 231 from top to bottom. During the suction phase, the elastic return of the switching elastic element 236 guides the switching magnetic block 237 to reset, achieving precise opening and closing of the gas path. By intercepting the bend 2311 to prevent gas backflow and reducing the backflow of water droplets formed by temperature changes into the double cone drying chamber 31, the automatic switching of dust interception and gas emission paths is realized, significantly reducing the maintenance frequency of the blowing and suction tube assembly 23 and ensuring the stability of the vacuum environment inside the drying chamber.

[0032] The purging assembly 22 includes a preheater 221, a pump 222 and a gas storage tank 223. The preheater 221 and the gas storage tank 223 are connected, the pump 222 and the gas storage tank 223 are connected, and the gas storage tank 223 is used to store inert gas, which has a density less than that of air. The purge pipe 231 is fitted around the suction pipe 232, and the air pump 222 is connected to the purge pipe 231.

[0033] By adopting the above technical solution, the purge pipe 231 is coaxially sleeved around the suction pipe 232. This sleeve structure saves space while using the outer airflow to provide thermal shielding protection for the inner pipeline. The purge assembly 22 can use helium as the specific inert gas (the density of helium is about 0.1786 kg / m³, which is much smaller than the density of air) and store it in the gas storage tank 223. The helium in the gas storage tank 223 is first preheated by the preheater connected to it to ensure that the gas temperature matches the environment inside the drying chamber. Then, the high-pressure power generated by the air pump 222, which is connected to both the gas storage tank 223 and the purge pipe 231, continuously pressurizes the heated helium into the annular channel between the purge pipe 231 and the suction pipe 232. Its working principle is based on the extremely low density of helium, which allows it to float upwards quickly and penetrate the filter screen evenly after entering the rotating mechanism 3. Combined with the heat energy provided by the preheater 221, it prevents condensation caused by heat exchange. The effect is that by using helium, which is lightweight and stable, as the purging medium, not only is the oxidation and deterioration of the material during the drying process effectively avoided, but its high permeability also significantly improves the removal efficiency of fine dust on the dustproof net 234. At the same time, the sleeve structure effectively reduces the risk of condensation of steam in the suction pipe 232 due to temperature difference, ensuring the long-term smooth and efficient operation of the blowing and suction system.

[0034] The adsorption assembly 21 includes a gas-liquid separator 211 and a vacuum pump 212, which are connected to the gas-liquid separator 211. Vacuum pump 212 and suction pipe 232 are connected.

[0035] By adopting the above technical solution, the adsorption component 21, as the core unit for maintaining the system's vacuum environment and media recovery, has its vacuum pump 212 physically connected to the gas-liquid separator 211 and the suction pipe 232, forming a complete negative pressure loop from the power source to the execution end. Its working process and principle are as follows: starting the vacuum pump 212 generates continuous negative pressure suction, which draws away the high-temperature water vapor, low-density inert gas, and trace dust mixture from the double-cone drying chamber 31 through the connected suction pipe 232. When these mixed gases enter the gas-liquid separator 211 connected to it... At 11 o'clock, the gas phase and liquid phase are separated by the principle of internal volume expansion or centrifugal collision, and the condensed liquid is trapped in the collection area at the bottom of the separator. The effect is that the adsorption component 21 ensures that the drying environment is always in a high vacuum state through the strong suction of the vacuum pump 212. Combined with the pretreatment function of the gas-liquid separator 211, it effectively prevents liquid water from entering the vacuum pump 212 and causing damage to the pump body or a decrease in vacuum. This achieves efficient purification of the medium discharged from the suction pipe 232, and significantly improves the stability of the whole machine operation and the efficiency of water vapor discharge.

[0036] The rotating mechanism 3 includes a double-cone drying chamber 31, a flow restrictor 32, a pressure sensor 33, a temperature sensor 34, a discharge valve 35, a feed valve 36, a valve cover 37, a rotating motor 38, and a transmission belt 39. The double-cone drying chamber 31 is a double-cone shape. The flow restrictor 32 is installed on the double-cone drying chamber 31. The pressure sensor 33 and the temperature sensor 34 are both installed on the valve cover 37. The valve cover 37 and the double-cone drying chamber 31 are hinged. The discharge valve 35 is installed on the double-cone drying chamber 31. The rotating motor 38 and the transmission belt 39 are connected for transmission. The transmission belt 39 is also connected for transmission to the double-cone drying chamber 31.

[0037] By adopting the above technical solution, the rotating mechanism 3 achieves efficient dynamic drying of materials through the coordinated operation of its components: the double-cone drying chamber 31, which is shaped like a double cone, is rotatably connected to the support mechanism 1 as the core container. The material is fed into the chamber through the feed valve 36 and then sealed by the valve cover 37 hinged to the double-cone drying chamber 31. The pressure sensor 33 and temperature sensor 34 installed on the valve cover 37 are used to obtain the vacuum and temperature data inside the chamber in real time and feed them back to the control system. Its working process and principle are as follows: the rotating motor 38 installed on the support mechanism 1 starts, and its output power is smoothly transmitted to the double-cone drying chamber 31 through the transmission belt 39, driving it to make continuous tumbling motion relative to the support mechanism 1, so that the material continuously rolls and renews the heated surface under the action of gravity; during this process, the flow-limiting plate 32 installed inside the double-cone drying chamber 31 guides the sliding path of the material in an orderly manner, preventing the material from accumulating at the top of the cone and enhancing the heat exchange efficiency. The achieved effect is that the mechanical transmission of the rotating motor 38 and the transmission belt 39 realizes the stable rotation of the box. The precise cooperation of the feed valve 36, the discharge valve 35 and the valve cover 37 ensures the complete sealing of the drying process. With the uniform distribution effect of the flow limiting plate 32 and the real-time parameter monitoring of the pressure sensor 33 and the temperature sensor 34, the uniformity of material drying and the safety of operation are greatly improved. Finally, the dried material is quickly unloaded through the discharge valve 35.

[0038] The area enclosed by the double cone drying oven 31 and the flow limiting plate 32 is provided with an S-shaped flow channel 321, and the S-shaped flow channel 321 is provided with a hot flow inlet 3211 and a cold flow return outlet 3212. Both the hot flow inlet 3211 and the cold flow return inlet 3212 are connected to the temperature control mechanism 4.

[0039] By adopting the above technical solution, the double-cone drying oven 31 and the internal flow-limiting plate 32 are precisely welded or cast to form a continuous, turning S-shaped flow channel 321 in the interlayer area. This flow channel serves as the main circulation path for the heat exchange medium and, together with the external temperature control mechanism 4, constitutes a closed-loop temperature control circulation system. When the drying operation is started, the temperature control mechanism 4 injects the heating or cooling medium (such as heat transfer oil or hot water) into the circulation loop through the hot flow inlet 3211 provided on the S-shaped flow channel 321. Guided by the S-shaped flow channel 321, the medium is forced to flow along a wavy or serpentine trajectory to fully pass through the entire outer wall of the double-cone drying oven 31, increasing the effective residence time and heat exchange stroke of the medium on the wall surface. After completing the heat transfer, the medium is finally discharged from the cold flow return port 3212 provided on the S-shaped flow channel 321 and flows back to the temperature control mechanism 4 through the pipeline for re-temperature adjustment. The effect achieved is that the S-shaped flow channel 321 formed by forcibly changing the direction of the fluid through the flow restrictor 32 effectively eliminates the heat exchange blind zone and greatly increases the heat exchange area. Combined with the directional guidance of the hot flow inlet 3211 and the cold flow return port 3212, it ensures the high uniformity and efficiency of the material heating in the double cone drying oven 31, and significantly improves the equipment's ability to accurately control the temperature fluctuations of sensitive materials.

[0040] The temperature control mechanism 4 includes a hot flow chamber 41, a cold flow chamber 42, a hot flow pipe 43, and a cold flow pipe 44. The hot flow chamber 41 and the hot flow pipe 43 are connected, and the cold flow chamber 42 and the cold flow pipe 44 are connected. The hot flow pipe 43 is connected to the hot flow inlet 3211, and the cold flow pipe 44 is connected to the cold flow return port 3212.

[0041] By adopting the above technical solution, the temperature control mechanism 4 achieves precise control of the material temperature through the closed-loop circulation of the medium: the hot flow chamber 41 and the cold flow chamber 42, as the core of heat energy supply and recovery, are stably installed on the support mechanism 1 to reduce the impact of vibration during operation, and establish fluid loops with the rotating drying chamber through the hot flow pipe 43 and the cold flow pipe 44, respectively. The preheated hot medium in the hot flow chamber 41 is pressurized into the hot flow pipe 43 connected to it, and is injected into the heat exchange channel of the double cone drying chamber 31 through the hot flow inlet 3211, so as to evenly transfer the heat to the material; after completing the heat exchange, the cooled medium is discharged from the cold flow return port 3212 and guided to the cold flow chamber 42 for collection and reheating through the cold flow pipe 44 connected to it. The effect achieved is that the heating path formed by the hot flow box 41, the hot flow pipe 43 and the hot flow inlet 3211, and the return path formed by the cold flow return port 3212, the cold flow pipe 44 and the cold flow box 42, ensure the efficient and stable circulation of the heat energy medium between the support mechanism 1 and the rotating parts, effectively avoid energy obstruction in the heat exchange process, and significantly improve the system's control accuracy of drying temperature and energy utilization rate.

[0042] The cold flow tube 44 is fitted around the hot flow tube 43, and the hot flow box 41 and the cold flow box 42 are both located below the cold flow tube 44.

[0043] By adopting the above technical solution, the cold flow tube 44 is coaxially sleeved around the hot flow tube 43 to form a double-layer sleeve structure, and both the hot flow box 41 and the cold flow box 42 are arranged in the support position below the cold flow tube 44. Its working process and principle are as follows: the high-temperature heat medium is transferred to the dryer in the inner hot flow tube 43, while the return medium after heat exchange is reversed through the outer cold flow tube 44. The outer fluid is used as a natural thermal insulation shielding layer, which effectively suppresses the heat energy of the inner hot flow tube 43 from flowing outward. The boundary is greatly dispersed. At the same time, since both the hot flow box 41 and the cold flow box 42 are located at a low position under gravity below the cold flow pipe 44, the return medium can be more smoothly collected into the corresponding box under the dual drive of pressure difference and gravity. The effect achieved is that the pipeline has a self-insulating function through this special coaxial nesting layout, which significantly improves the thermal efficiency of the temperature control system. The low-positioned hot flow box 41 and cold flow box 42 ensure the stability of the medium circulation and avoid the interference of backflow accumulation on the temperature control accuracy.

[0044] The support mechanism 1 includes a rotating frame 11 and a connecting frame 12. The rotating frame 11 is mounted on the connecting frame 12, and the cross section of the rotating frame 11 is triangular. The rotating frame 11 and the double cone drying oven 31 are rotatably connected. The rotating frame 11 is fastened to the gas-liquid separator 211, vacuum pump 212, preheater 221, air pump 222, gas storage tank 223, rotating motor 38, hot flow box 41 and cold flow box 42 respectively.

[0045] By adopting the above technical solution, the support mechanism 1 provides overall ground support through the connecting frame 12, and the rotating frame 11 installed on it adopts a triangular cross-section design to construct extremely high structural stability and seismic resistance. The double cone drying box 31 is rotatably connected to the rotating frame 11, forming the core of dynamic drying; at the same time, all power and control components of the system, including the preheater 221, air pump 222, air storage tank 223, hot flow box 41, cold flow box 42, gas-liquid separator 211, and vacuum pump 212, are all firmly connected to the rotating frame 11, forming a highly integrated functional module with the frame. Its working principle lies in utilizing the triangular-like stable geometry of the rotating frame 11 to provide a stable and rigid carrier for the high-speed rotating double-cone drying chamber 31 and the high-frequency operating vacuum pump 212 and air pump 222. Simultaneously, by centrally arranging the hot flow chamber 41, cold flow chamber 42, preheater 221, gas storage tank 223, and gas-liquid separator 211 within the rotating frame 11, the connecting pipelines between each component and the drying chamber are shortened to the greatest extent possible. The achieved effect is that, through the high-strength structural cooperation between the rotating frame 11 and the connecting frame 12, modular and compact installation of the entire machine's functional components is realized. This not only significantly reduces mechanical wear caused by vibration but also effectively reduces the transmission loss of heat energy and vacuum pressure due to the greatly shortened pipelines, ensuring the long-term stable operation and efficient operation of the double-cone dryer under complex working conditions. Working principle of the invention: This invention achieves automated switching between the purging and suction paths by incorporating a switching electromagnetic block 235, a switching elastic element 236, and a slidingly connected switching magnetic block 237 on the suction pipe 232, utilizing the principle of magnetic pole repulsion. Combined with the unique intercepting bend 2311 on the purging pipe 231, it effectively blocks gas backflow, preventing water droplets caused by temperature differences from seeping back into the double-cone drying oven 31. This unique non-contact magnetic drive structure not only avoids the mechanical wear of traditional valve operations but also ensures the precise opening and closing of the suction holes 2332 and blowing holes 2331 on the suction head 233 at different drying stages. This fundamentally improves the reliability of cleaning dust from the dust filter 234, ensuring the long-term stability of the vacuum environment. The layout of the purging pipe 231 coaxially sleeved around the suction pipe 232 utilizes the outer airflow to provide thermal shielding for the inner pipeline, significantly reducing the risk of water vapor condensation and scaling. By combining a preheater 221, a blower 222, and a gas storage tank 223, preheated helium, with a density much lower than water vapor, is introduced. Utilizing its extremely high upward buoyancy and physical permeability, the airflow can uniformly penetrate the dustproof net 234, achieving efficient removal of fine dust. This mechanical design, based on density differences and coaxial insulation, prevents material oxidation and deterioration while enhancing the discharge power of water vapor through the high permeability of helium, completely solving the technical problem of easy clogging of the exhaust channel under complex working conditions. The continuous S-shaped flow channel 321 formed within the double-cone drying chamber 31 by the flow-limiting plate 32 significantly extends the heat exchange path and eliminates heat exchange blind spots. Combined with the gravity recirculation design where the cold flow pipe 44 is fitted with the hot flow pipe 43 and the chamber is arranged at a low position, efficient utilization of thermal energy is achieved. The support mechanism 1 uses a rotating frame 11 with a triangular cross-section, tightly integrating the vacuum pump 212, gas-liquid separator 211, temperature control chamber, and other power components into one unit, significantly shortening the pipeline transmission distance and reducing pressure and heat loss. This structure not only enhances the anti-vibration rigidity of the equipment during rotation, but also ensures the stability of heat flow and airflow circulation under dynamic flipping conditions through a compact parts arrangement, significantly improving the uniformity of the drying operation.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-cone rotary dryer with gas adsorption function, characterized in that: The double cone rotary dryer includes a support mechanism (1), a blowing and suction mechanism (2), a rotating mechanism (3) and a temperature control mechanism (4), wherein the rotating mechanism (3) and the support mechanism (1) are rotatably connected; The blowing and suction mechanism (2) includes an adsorption component (21), a purging component (22), and a blowing and suction tube assembly (23), wherein the adsorption component (21) and the purging component (22) are both connected to the blowing and suction tube assembly (23); The blow-suction tube assembly (23) includes a blow-sweeping tube (231), a suction tube (232), a blow-suction head (233), and a dustproof net (234). The blow-suction head (233) is connected to the blow-sweeping tube (231) and the suction tube (232) respectively, and the dustproof net (234) is connected to the blow-suction head (233). The purge pipe (231) and the purge assembly (22) are connected, the suction pipe (232) and the adsorption assembly (21) are connected, the adsorption assembly (21) and the purge assembly (22) are both connected to the support mechanism (1), the purge pipe assembly (23) is located in the rotating mechanism (3), and the upper side of the purge head (233) is used for exhaust. The blow-suction tube assembly (23) further includes a switching electromagnetic block (235), a switching elastic element (236), and a switching magnetic block (237). The switching elastic element (236) is respectively installed on the switching electromagnetic block (235) and the switching magnetic block (237). The switching electromagnetic block (235) and the switching magnetic block (237) are driven by magnetic pole repulsion. The purge tube (231) is provided with a retaining bend (2311), and the end of the purge tube (231) is inclined upward; The switching electromagnetic block (235) is mounted on the suction tube (232), and the switching magnetic block (237) and the suction tube (232) are slidably connected; The blow-and-suction head (233) is provided with a blow hole (2331) and a suction hole (2332). The blow hole (2331) is located above the blow-and-suction head (233), and the suction hole (2332) is located below the blow-and-suction head (233). The blow hole (2331) is used to blow away dust on the dustproof net (234).

2. The double-cone rotary dryer with gas adsorption function according to claim 1, characterized in that: The purging assembly (22) includes a preheater (221), a pump (222), and a gas storage tank (223). The preheater (221) and the gas storage tank (223) are connected, and the pump (222) and the gas storage tank (223) are in communication. The gas storage tank (223) is used to store inert gas, which has a density less than that of air. The purge pipe (231) is sleeved around the suction pipe (232), and the air pump (222) is connected to the purge pipe (231).

3. A double-cone rotary dryer with gas adsorption function according to claim 2, characterized in that: The adsorption assembly (21) includes a gas-liquid separator (211) and a vacuum pump (212), which are connected to the gas-liquid separator (211); The vacuum pump (212) and the suction pipe (232) are connected.

4. A double-cone rotary dryer with gas adsorption function according to claim 3, characterized in that: The rotating mechanism (3) includes a double cone drying chamber (31), a flow restrictor (32), a pressure sensor (33), a temperature sensor (34), a discharge valve (35), a feed valve (36), a valve cover (37), a rotating motor (38), and a transmission belt (39). The double cone drying chamber (31) is a double cone shape. The flow restrictor (32) is installed on the double cone drying chamber (31). The pressure sensor (33) and the temperature sensor (34) are both installed on the valve cover (37). The valve cover (37) and the double cone drying chamber (31) are hinged. The discharge valve (35) is installed on the double cone drying chamber (31). The rotating motor (38) and the transmission belt (39) are connected in a driving connection. The transmission belt (39) and the double cone drying chamber (31) are connected in a driving connection.

5. A double-cone rotary dryer with gas adsorption function according to claim 4, characterized in that: The area enclosed by the double cone drying oven (31) and the flow restrictor (32) is provided with an S-shaped flow channel (321), and the S-shaped flow channel (321) is provided with a hot flow inlet (3211) and a cold flow return port (3212). The hot flow inlet (3211) and the cold flow return inlet (3212) are both connected to the temperature control mechanism (4).

6. A double-cone rotary dryer with gas adsorption function according to claim 5, characterized in that: The temperature control mechanism (4) includes a hot flow chamber (41), a cold flow chamber (42), a hot flow pipe (43), and a cold flow pipe (44). The hot flow chamber (41) and the hot flow pipe (43) are connected, and the cold flow chamber (42) and the cold flow pipe (44) are connected. The hot flow pipe (43) is connected to the hot flow inlet (3211), and the cold flow pipe (44) is connected to the cold flow return port (3212).

7. A double-cone rotary dryer with gas adsorption function according to claim 6, characterized in that: The cold flow tube (44) is sleeved around the hot flow tube (43), and the hot flow box (41) and the cold flow box (42) are both located below the cold flow tube (44).

8. A double-cone rotary dryer with gas adsorption function according to claim 7, characterized in that: The support mechanism (1) includes a rotating frame (11) and a connecting frame (12). The rotating frame (11) is mounted on the connecting frame (12). The cross section of the rotating frame (11) is triangular. The rotating frame (11) and the double cone drying box (31) are rotatably connected. The rotating frame (11) is fastened to the gas-liquid separator (211), vacuum pump (212), preheater (221), air pump (222), gas storage tank (223), rotating motor (38), hot flow box (41) and cold flow box (42) respectively.

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