Filtering device and filtering method

Abstract

The invention relates to a filtering device and a filtering method. A drying bin is used for filtering and drying tobacco stem powder in a solution; the suction filtration bottle is located on the side, facing the gravity direction, of the drying bin 3 and used for storing and collecting the filtered solution. A feeding opening penetrating in the gravity direction is formed in the drying bin, and a filter screen is detachably mounted on the inner wall of the feeding opening; a first drying part and a second drying part are arranged on the inner wall of one side, close to the filter screen, of the drying bin; the first drying part is located on the side, away from the gravity direction, of the filter screen. The second drying part is located on the side, facing the gravity direction, of the filter screen, and a plurality of second spraying holes are formed in the inner wall of the second drying part. The filter screen is directly used as a common carrier for filtering and drying, so that insoluble substances do not need to be transferred. A hot air system of the device forms a three-dimensional hot air field through gradient spray holes in the two sides of a filter screen, heating is conducted on the upper side and the lower side of the filter screen at the same time, heat insulation dead corners do not exist, and the drying efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of chemical detection technology, and in particular to a filtration device and filtration method. Background Technology

[0002] In fields such as chemical engineering, pharmaceuticals, food processing, and environmental monitoring, the quantitative analysis of insoluble, oven-dry substances in solution is a core component. Different sectors have varying focuses in their analytical needs, but the essence is the same: controlling product quality or assessing environmental conditions through data. In the chemical industry, it is primarily used to monitor the purity of raw materials and reaction products, preventing insoluble impurities from affecting subsequent production processes or the performance of the final product.

[0003] Traditional detection methods primarily rely on centrifugation-drying-weighing, a process involving high-speed centrifugation, multiple washings, constant-temperature drying, and constant-weight weighing. This entire process takes 4-6 hours and has significant technical drawbacks. First, centrifugation efficiency is limited by rotational speed, easily resulting in the retention and loss of nanoscale particles or colloidal substances, leading to systematically lower measurement results. Second, traditional oven drying uses thermal radiation heat transfer, creating a temperature gradient within the sample, which can easily cause pyrolysis of organic matter or incomplete removal of water of crystallization, affecting the accuracy of the chemical composition of the oven-dried material. Furthermore, the numerous manual steps involved, such as transferring centrifuge tubes and weighing desiccators, easily introduce errors, with repeatability errors often exceeding 5%. Summary of the Invention

[0004] Therefore, it is necessary to provide a filtration device to address the problems of long operating procedures, low accuracy and large errors, numerous manual operations and limited automation in the current detection of insoluble matter in solutions.

[0005] According to one aspect of this application, a filtration device is provided for a solution containing insoluble matter, the insoluble matter being tobacco stem powder. The filtration device includes a drying chamber for filtering and drying the tobacco stem powder in the solution; and a suction flask located on the side of the drying chamber facing the direction of gravity for storing the filtered solution.

[0006] The drying chamber has a feed inlet extending along the direction of gravity, and a filter screen is detachably installed on the inner wall of the feed inlet. A first drying section and a second drying section are located on the inner wall of the drying chamber near the filter screen. The first drying section is located on the side of the filter screen away from the direction of gravity, and its inner wall has multiple first spray holes. The distance between the first spray holes and the filter screen along the direction of gravity gradually increases from the end of the first spray hole closest to the filter screen to the end furthest from the filter screen. The second drying section is located on the side of the filter screen facing the direction of gravity, and its inner wall has multiple second spray holes. The distance between the second spray holes and the filter screen along the direction of gravity gradually increases from the end of the second spray hole closest to the filter screen to the end furthest from the filter screen.

[0007] In one embodiment, the filtration bottle is threaded with a top cover, and the drying chamber is provided with a guide pipe located on the side of the filter screen facing the direction of gravity. The end of the guide pipe away from the filter screen is detachably installed on the top cover.

[0008] In one embodiment, the filtration device includes a negative pressure device, and the filtration bottle is also provided with an air extraction pipe, the output end of the negative pressure device being detachably connected to the air extraction pipe.

[0009] In one embodiment, a boss is provided on the inner wall of the feed inlet, and the boss is located between the first drying section and the second drying section; a plurality of magnetic sheets are installed on the outer wall of the boss on the side opposite to the direction of gravity; the edge of the filter screen includes a positioning ring, and the filter screen is movably mounted on the boss through the positioning ring.

[0010] In one embodiment, the filtration device includes a hot air device, the drying chamber has a connecting cavity inside, the connecting cavity is connected to the first spray hole and the second spray hole, and the output end of the hot air device is connected to the connecting cavity.

[0011] In one embodiment, a shielding ring is rotatably mounted on the inner wall of the communicating cavity facing the filter screen, and the shielding ring has a plurality of slots that intermittently communicate with the first spray hole and the second spray hole.

[0012] In one embodiment, the filtration device includes a toothed ring, and a plurality of through swing grooves are formed on the outer wall of the drying chamber on the side away from the filter screen; a plurality of swing arms are fixedly arranged on the toothed ring, and the end of the swing arm away from the toothed ring is connected to the shielding ring; in the corresponding swing groove and swing arm, the swing arm is movably arranged in the swing groove.

[0013] In one embodiment, the filtration device includes a motor, the output of which is fitted with a drive gear that meshes with the gear ring.

[0014] In one embodiment, the filtration flask is provided with multiple handles and multiple observation windows; the top cover is provided with a control panel.

[0015] In one embodiment, a filtration method involves: driving a shielding ring to block the first and second spray holes and activating a negative pressure device; pouring a measured amount of solution containing insoluble tobacco stem powder into a drying chamber, leaving the tobacco stem powder on a filter screen; storing the filtered solution in a suction flask and repeatedly washing the tobacco stem powder on the filter screen with clean water; opening the first and second spray holes by driving the shielding ring, closing the negative pressure device, and activating the hot air device; removing the filter screen and the tobacco stem powder on the filter screen and weighing the dried tobacco stem powder. This application has the following beneficial effects:

[0016] This application achieves highly efficient linkage across the entire process of filtration, washing, and drying, thereby significantly improving the efficiency and effectiveness of insoluble matter removal. The device uses the filter screen directly as a shared carrier for filtration and drying, eliminating the need to transfer insoluble matter. Traditional oven drying relies on natural convection of hot air, resulting in slow and uneven heat transfer, especially for insoluble matter on the filter screen and filter paper. This device's hot air system creates a three-dimensional hot air field through gradient nozzles on both sides of the filter screen, heating both the top and bottom sides simultaneously, eliminating heat-insulating dead zones, and significantly improving drying efficiency. The device uses a magnetic filter screen for quick assembly and disassembly, fundamentally solving the problems of cumbersome procedures, low efficiency, and high loss rates associated with traditional methods, thus possessing high practical value. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0018] Figure 2 This is a cross-sectional view of the drying chamber in one embodiment of this application.

[0019] Figure 3 This is a three-dimensional structural diagram of the drying chamber in one embodiment of this application.

[0020] Figure 4 This is a three-dimensional structural diagram of the shielding ring in one embodiment of this application.

[0021] Figure 5 This is a partial three-dimensional structural diagram of the drying chamber in one embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Filter flask; 101. Observation window; 102. Handle; 103. Suction tube;

[0024] 2. Top cover; 201. Control panel;

[0025] 3. Drying chamber; 301. Guide pipe; 302. First drying section; 3021. First spray nozzle; 303. Second drying section; 3031. Second spray nozzle; 304. Boss; 305. Magnetic sheet; 306. Hot air equipment; 307. Swing groove; 308. Shielding ring; 3081. Slot; 309. Gear ring; 310. Swing arm; 311. Motor; 312. Drive gear; 313. Connecting cavity; 314. Feed inlet;

[0026] 4. Filter screen; 401. Positioning ring. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See appendix Figure 1 - Appendix Figure 5 , Figure 1 The diagram shows an overall structural schematic of a filtration device according to an embodiment of this application. The device is used for a solution containing insoluble matter, which is tobacco stem powder. The filtration device includes a drying chamber 3 for filtering and drying the tobacco stem powder in the solution; and a suction flask 1 located on the side of the drying chamber 3 facing the direction of gravity and used for storing the filtered solution.

[0034] The drying chamber 3 has a feed inlet 314 extending along the direction of gravity, and a filter screen 4 is detachably installed on the inner wall of the feed inlet 314. A first drying section 302 and a second drying section 303 are provided on the inner wall of the drying chamber 3 near the filter screen 4. The first drying section 302 is located on the side of the filter screen 4 away from the direction of gravity, and a plurality of first spray holes 3021 are provided on the inner wall of the first drying section 302. The distance between the first spray holes 3021 and the filter screen 4 along the direction of gravity gradually increases from the end of the first spray hole 3021 near the filter screen 4 to the end away from the filter screen 4. The second drying section 303 is located on the side of the filter screen 4 facing the direction of gravity, and a plurality of second spray holes 3031 are provided on the inner wall of the second drying section 303. The distance between the second spray holes 3031 and the filter screen 4 along the direction of gravity gradually increases from the end of the second spray holes 3031 near the filter screen 4 to the end away from the filter screen 4.

[0035] During operation, this filtration method, tailored to the characteristics of tobacco stem powder, employs a four-step process of filtration, washing, drying, and weighing. Combined with the device's shielding ring 308, negative pressure, and hot air functions, it achieves efficient quantitative analysis of insoluble substances. Driving the shielding ring 308 to rotate offsets the slot 3081 from the first spray hole 3021 and the second spray hole 3031, completely blocking the spray holes and preventing liquid from entering the drying chamber 3 during subsequent pouring. A stable negative pressure is created inside the suction flask 1 using the negative pressure device. The solution to be filtered slowly passes through the filter screen 4 under this negative pressure, while the liquid flows into the suction flask 1 through the guide pipe 301. The tobacco stem powder is retained on the surface of the filter screen 4.

[0036] After the solution has been completely filtered, maintain the negative pressure and slowly spray clean water onto the tobacco powder on the filter screen 4, washing 3-5 times until the filtrate is clear. Then drive the shielding ring 308 to rotate, aligning the slot 3081 with the first spray hole 3021 and the second spray hole 3031, and turn off the negative pressure device to disconnect the air extraction passage. Finally, turn on the hot air device 306, and after being distributed through the connecting cavity 313, the hot air is evenly sprayed from the spray holes on both sides of the filter screen 4, slowly and continuously drying for 0.5-1 hour.

[0037] See appendix Figure 1 - Appendix Figure 2 The filter bottle 1 is threaded with a top cover 2, and the drying chamber 3 is provided with a guide pipe 301 located on the side of the filter screen 4 facing the direction of gravity. The end of the guide pipe 301 away from the filter screen 4 is detachably installed on the top cover 2.

[0038] In some embodiments, the top cover 2 ensures the stability of the negative pressure environment inside the filtration bottle 1 and allows the drying chamber 3 to be precisely connected to the filtration bottle 1, preventing liquid or hot air leakage.

[0039] The top cover 2 serves two purposes: it acts as a sealing cover for the filtration flask 1 and provides a mounting base for the guide pipe 301 of the drying chamber 3. The threaded connection offers good sealing and facilitates disassembly for cleaning the interior of the filtration flask 1 or replacing components. The guide pipe 301 guides the flow of the filtrate. During filtration, the liquid passing through the filter screen 4 flows directly into the filtration flask 1 via the guide pipe 301, ensuring complete collection of the filtrate.

[0040] In some embodiments, the detachable structure adapts to the needs of multiple scenarios. The detachable design of the guide tube 301 and the top cover 2 allows the drying chamber 3 to be separated from the filtration bottle 1. After filtration, the drying chamber 3 can be removed for washing separately, or the filtration bottle 1 of different specifications can be replaced, thereby improving the flexibility and freedom of the device.

[0041] See appendix Figure 1 The filtration device includes a negative pressure device, and the vacuum filtration bottle 1 is also equipped with a vacuum pipe 103. The output end of the negative pressure device is detachably connected to the vacuum pipe 103.

[0042] In some embodiments, the negative pressure device is detachably connected to the filtration bottle 1 via the suction pipe 103. Its function is to provide a stable negative pressure environment for the filtration process, accelerate the solid-liquid separation efficiency, and the detachable design facilitates equipment maintenance, cleaning of the filtration bottle 1, and flexible adaptation between different devices.

[0043] The negative pressure equipment provides controllable negative pressure to ensure filtration efficiency. The equipment draws air from the filtration flask 1 through the suction pipe 103, creating a negative pressure inside the flask. Under this pressure difference, the solution to be filtered can quickly pass through the filter screen 4 into the filtration flask 1, increasing efficiency by 5-10 times compared to natural filtration. Furthermore, the negative pressure can be adjusted by the equipment to suit different sample requirements.

[0044] In some embodiments, the detachable design of this application brings two major advantages: First, the connection can be quickly disconnected after the operation, making it convenient to remove the filtration flask 1 to pour out the filtrate or clean it. Second, the negative pressure equipment can be adapted to multiple filtration flasks 1 by replacing the suction pipe 103 of different specifications, thereby improving the utilization rate of the equipment.

[0045] See appendix Figure 2 and attached Figure 5 A boss 304 is provided on the inner wall of the feed inlet 314, and the boss 304 is located between the first drying section 302 and the second drying section 303; a plurality of magnetic sheets 305 are installed on the outer wall of the boss 304 on the side away from the direction of gravity; the edge of the filter screen 4 includes a positioning ring 401, and the filter screen 4 is movably installed on the boss 304 through the positioning ring 401.

[0046] In some embodiments, the boss 304 and magnetic sheet 305 on the inner wall of the feed inlet 314 enable rapid positioning, stable installation, and convenient disassembly of the filter screen 4. The boss 304 is located between the first drying section 302 and the second drying section 303, providing a horizontal support surface for the filter screen 4. Its positional design ensures that the filter screen 4 is precisely positioned in the middle of the two drying sections, ensuring that the hot air from the first nozzle 3021 and the second nozzle 3031 can act evenly on both sides of the filter screen 4.

[0047] In some embodiments, multiple magnetic sheets 305 are magnetically attracted to the positioning ring 401 of the filter 4. The positioning ring 401 is made of an iron-containing material, and no specific material is limited here. Compared with traditional bolt fixing, magnetic fixing requires no tools and allows the filter 4 to be placed or removed manually, greatly improving the efficiency of disassembly and assembly, while avoiding component wear caused by bolt disassembly and assembly.

[0048] In some embodiments, the positioning ring 401 is fixed to the edge of the filter screen 4. This serves two purposes: firstly, by engaging with the boss 304, it achieves horizontal positioning of the filter screen 4, preventing displacement under negative pressure or hot air impact. The magnetic adsorption design allows for the installation and removal of the filter screen 4 within seconds, saving significant time compared to traditional bolt fixing. The magnetic sheet 305 has a long service life; subsequent checks only require periodic verification of the magnetic force to ensure a firm attachment, eliminating the need for frequent replacement of vulnerable parts and reducing maintenance costs.

[0049] See appendix Figure 1 - Appendix Figure 2 The filtration device includes a hot air device 306. The drying chamber 3 has a connecting cavity 313 inside. The connecting cavity 313 is connected to the first spray hole 3021 and the second spray hole 3031, and the output end of the hot air device 306 is connected to the connecting cavity 313.

[0050] In some embodiments, the hot air device 306 provides a stable and uniform hot air source for drying both sides of the filter screen 4, serving as a key power support for achieving efficient drying. The entire system operation process can be divided into three steps: hot air generation, centralized distribution, and precise spraying, forming a complete hot air supply chain: the hot air device 306 is responsible for heating the ambient temperature air to the set temperature and providing sufficient air pressure. The connecting cavity 313 is located inside the drying chamber 3, with one end connected to the output end of the hot air device 306 and the other end connected to both the first spray hole 3021 and the second spray hole 3031. Its function is to evenly distribute the hot air delivered by the hot air device 306 to the spray holes on both sides, avoiding uneven temperature and wind speed caused by path differences when the hot air is directly delivered, and ensuring that the hot air parameters on both sides of the filter screen 4 are consistent.

[0051] In some embodiments, the hot air parameters can be adjusted by the hot air device 306 to adapt to the drying requirements of different chemical samples, which is flexible in operation and reduces the cost of equipment modification.

[0052] See appendix Figure 4 - Appendix Figure 5 A shielding ring 308 is rotatably installed on the inner wall of the connecting cavity 313 facing the filter screen 4. The shielding ring 308 has multiple slots 3081 that are intermittently connected to the first spray hole 3021 and the second spray hole 3031.

[0053] In some embodiments, the design of the shielding ring 308 and the connecting cavity 313 is to achieve intermittent communication between the slot 3081 and the first spray hole 3021 and the second spray hole 3031 by rotating the shielding ring 308, thereby dynamically adjusting the timing and intensity of hot air injection, further optimizing the drying uniformity on both sides of the filter screen 4, and preventing the material from being blown away due to excessive wind force.

[0054] When the motor 311 drives the gear ring 309 to rotate via the drive gear 312, the swing arm 310 will drive the shielding ring 308 to rotate synchronously on the inner wall of the connecting cavity 313. At this time, the slot 3081 on the shielding ring 308 will rotate with it, periodically aligning with or offsetting the first nozzle 3021 and the second nozzle 3031.

[0055] When the slot 3081 is aligned with the spray holes on the upper and lower sides, hot air can be sprayed from the spray holes through the slot 3081 onto the filter screen 4 and the solid material to achieve heating and drying.

[0056] When the slot 3081 is misaligned with the nozzle, the solid part of the shielding ring 308 will block the nozzle, and the connecting cavity 313 will be separated from the feed inlet 314 to prevent liquid from entering the interior of the connecting cavity 313 during the filtration operation.

[0057] In some embodiments, the aperture of the slot 3081 matches the aperture of the first nozzle 3021 and the second nozzle 3031 to ensure that hot air can pass smoothly when aligned, avoiding insufficient ventilation due to size deviation. Multiple slots 3081 are evenly distributed and spaced apart on the shielding ring 308, and must correspond to the positions of the first nozzle 3021 and the second nozzle 3031 to ensure that the nozzles on both sides of the filter 4 are simultaneously covered during rotation, achieving synchronous intermittent adjustment.

[0058] See appendix Figure 3 - Appendix Figure 4 The filter device includes a toothed ring 309. Multiple through swing grooves 307 are provided on the outer wall of the drying chamber 3 away from the filter screen 4. Multiple swing arms 310 are fixedly provided on the toothed ring 309. The end of the swing arm 310 away from the toothed ring 309 is connected to the shielding ring 308. In the corresponding swing groove 307 and swing arm 310, the swing arm 310 is movably disposed in the swing groove 307.

[0059] In some embodiments, the toothed ring 309 is used to drive the shielding ring 308 to swing synchronously by rotating the swing arm 310, thereby achieving the opening and closing of the feed inlet 314 on the drying chamber 3, preventing the solution or hot water from flowing back into the drying chamber 3 during filtration, which would affect subsequent drying operations, and also preventing the overflow and loss of solid particles during the drying process.

[0060] In some embodiments, when the motor 311 drives the drive gear 312 to rotate, the gear ring 309 meshing with the drive gear 312 will rotate synchronously. Since one end of the swing arm 310 is fixed on the gear ring 309 and the other end is connected to the shielding ring 308, and the swing arm 310 is movably inserted into the swing groove 307 of the drying chamber, the rotation of the gear ring 309 will be converted into the swing of the shielding ring 308 through the swing arm 310.

[0061] In addition, the opening degree of the first spray hole 3021 and the second spray hole 3031 can be changed in real time by swinging the shielding ring 308, such as partially shielding or fully opening, so as to adjust the drying air force according to actual needs.

[0062] In some embodiments, during the drying process, to prevent the tobacco stem powder on the filter screen 4 from being carried away by the strong hot air, the first nozzle 3021 and the second nozzle 3031 are designed with an inclined structure, and the hot air force should not be too strong. The nozzle design of the first nozzle 3021 and the second nozzle 3031 both follow the gradient distance principle in the direction of gravity, so as to allow the hot air to form a full-coverage, no-dead-angle heating effect on both sides of the filter screen 4.

[0063] The first nozzle 3021 above the first drying section 302 is far from the filter screen 4, while the first nozzle 3021 below is close to the filter screen 4. This avoids the hot air above the filter screen 4 from concentrating at a single point, forming a gradient hot air coverage from top to bottom, and preventing the filter screen 4 from having an excessively low local temperature, which could lead to uneven heating of the solid.

[0064] The second nozzle 3031 below the second drying section 303 is far from the filter screen 4, while the second nozzle 3031 above is close to the filter screen 4. The gradient hot air from bottom to top can directly act on the solid particles, especially for solids with a slightly thicker buildup. The hot air from the lower, far-away second nozzle 3031 can penetrate the bottom layer, while the hot air from the upper, close-away second nozzle 3031 can dry the surface layer, preventing the bottom solids from failing to dry due to insufficient heat.

[0065] The gradient nozzles on both sides of filter 4 create a three-dimensional hot air field from different directions. Regardless of the uniformity of the solid particles' distribution on filter 4, they can be fully enveloped by the hot air, avoiding the problem of edges drying first and the center drying later, which is common in traditional single-sided drying, and further shortening the drying time. Furthermore, this design prevents overheating damage. The gradient distance design ensures that the hot air is not directly directed at a single point, but rather forms a gentle hot air stream through jets at varying distances. This is particularly suitable for heat-sensitive insoluble substances in the chemical industry, preventing localized overheating that could lead to decomposition or denaturation of the substance and ensuring the accuracy of analytical results.

[0066] In some embodiments, the swing arm 310 and the swing groove 307 are moving friction parts, which need to be made of wear-resistant and temperature-resistant materials to reduce wear caused by long-term friction and extend service life.

[0067] To improve the sealing effect and prevent hot air from escaping, the gear ring 309 completely blocks the swing groove 307 during rotation.

[0068] See appendix Figure 2 - Appendix Figure 4 The filter device includes a motor 311, and the output end of the motor 311 is equipped with a drive gear 312 that meshes with a gear ring 309.

[0069] In some embodiments, a motor 311 structure is designed to drive the gear ring 309 and the shielding ring 308 to rotate, thereby shielding or opening the first nozzle 3021 and the second nozzle 3031 under different working processes.

[0070] The motor 311 meshes with the gear ring 309 through the drive gear 312 at the output end, providing stable power to the shielding ring 308, realizing automated operation and replacing manual operation, further improving filtration efficiency and stability.

[0071] See appendix Figure 1 The filtration flask 1 is equipped with multiple handles 102 and multiple observation windows 101; the top cover 2 is equipped with a control panel 201.

[0072] In some embodiments, since the top cover 2 is threaded onto the filtration bottle 1, a handle 102 structure is designed to facilitate its rotation and disassembly for cleaning the equipment after filtration.

[0073] In some embodiments, multiple observation windows 101 are provided on the filtration flask 1, which are used to observe the liquid level, clarity, and solid-liquid separation state of the filtrate in the flask from different angles in real time. This solves the problem of blind operation of the traditional filtration flask 1 and further improves the controllability of the experiment and the accuracy of the results. To facilitate the operator's control of the equipment's working status, a control panel 201 structure is designed.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A filtration device for a solution containing an insoluble substance, said insoluble substance being tobacco stem powder, characterized in that, The filtration device includes: Drying chamber (3) is used to filter and dry the tobacco stem powder in the solution; A vacuum filtration flask (1) is located on the side of the drying chamber (3) facing the direction of gravity and is used to store the filtered solution. The drying chamber (3) is provided with a feed inlet (314) that runs through the direction of gravity, and a filter screen (4) is detachably installed on the inner wall of the feed inlet (314); a first drying section (302) and a second drying section (303) are provided on the inner wall of the drying chamber (3) near the filter screen (4). The first drying section (302) is located on the side of the filter screen (4) away from the direction of gravity, and a plurality of first spray holes (3021) are provided on the inner wall of the first drying section (302). The distance between the first spray hole (3021) and the filter screen (4) along the direction of gravity gradually increases from the end of the first spray hole (3021) closer to the filter screen (4) to the end away from the filter screen (4). The second drying section (303) is located on the side of the filter screen (4) facing the direction of gravity, and a plurality of second spray holes (3031) are provided on the inner wall of the second drying section (303). The distance between the second spray hole (3031) and the filter screen (4) along the direction of gravity gradually increases from the end of the second spray hole (3031) closer to the filter screen (4) to the end away from the filter screen (4).

2. The filtration device according to claim 1, characterized in that, The filter bottle (1) is threaded with a top cover (2), and the drying chamber (3) is provided with a guide pipe (301) located on the side of the filter screen (4) facing the direction of gravity. The end of the guide pipe (301) away from the filter screen (4) is detachably installed on the top cover (2).

3. The filtration device according to claim 1 or 2, characterized in that, The filtration device includes a negative pressure device, and the filtration bottle (1) is also provided with a suction pipe (103). The output end of the negative pressure device is detachably connected to the suction pipe (103).

4. The filtration device according to claim 1 or 2, characterized in that, A boss (304) is provided on the inner wall of the feed inlet (314), and the boss (304) is located between the first drying section (302) and the second drying section (303). Multiple magnetic sheets (305) are installed on the outer wall of the boss (304) on the side opposite to the direction of gravity; the edge of the filter (4) includes a positioning ring (401), and the filter (4) is movably installed on the boss (304) through the positioning ring (401).

5. The filtration device according to claim 1 or 2, characterized in that, The filtration device includes a hot air device (306), and the drying chamber (3) has a connecting cavity (313) inside. The connecting cavity (313) is connected to the first spray hole (3021) and the second spray hole (3031), and the output end of the hot air device (306) is connected to the connecting cavity (313).

6. The filtration device according to claim 5, characterized in that, A shielding ring (308) is rotatably installed on the inner wall of the communicating cavity (313) facing the filter screen (4). The shielding ring (308) has multiple slots (3081) that are intermittently connected to the first spray hole (3021) and the second spray hole (3031).

7. The filtration device according to claim 6, characterized in that, The filter device includes a toothed ring (309), and a plurality of through swing grooves (307) are provided on the outer wall of the drying chamber (3) away from the filter screen (4); a plurality of swing arms (310) are fixedly provided on the toothed ring (309), and one end of the swing arm (310) away from the toothed ring (309) is connected to the shielding ring (308). In the corresponding swing groove (307) and swing arm (310), the swing arm (310) is movably disposed in the swing groove (307).

8. The filtration device according to claim 7, characterized in that, The filter device includes a motor (311), and the output end of the motor (311) is equipped with a drive gear (312) that meshes with the gear ring (309).

9. The filtration device according to claim 1 or 2, characterized in that, The filtration flask (1) is provided with multiple handles (102). And / or, the filtration flask (1) is provided with a plurality of observation windows (101); And / or, the top cover (2) is provided with a control panel (201).

10. A filtration method, characterized in that, For the filtration apparatus according to any one of claims 1-9, the filtration method comprises: The drive shielding ring (308) shields the first nozzle (3021) and the second nozzle (3031) and starts the negative pressure device; A measured amount of solution containing insoluble tobacco stem powder is poured into the drying chamber (3), the tobacco stem powder remains on the filter screen (4), the filtered solution is stored in the suction flask (1), and the tobacco stem powder on the filter screen (4) is washed multiple times with clean water. The drive shielding ring (308) opens the first nozzle (3021) and the second nozzle (3031), closes the negative pressure device and turns on the hot air device (306). Remove the filter screen (4) and the tobacco stem powder on the filter screen (4) and weigh the dried tobacco stem powder.

Images