Batch circulating mixed flow dryer dust removal device

Abstract

The application discloses a batch circulating mixed flow dryer dust removal device, which comprises a drying section, a hot air passage for drying grains in the drying section, an auxiliary air duct arranged on the side of the hot air passage, and a same negative pressure hot air source shared by the hot air passage and the auxiliary air duct. The auxiliary air duct is ingeniously arranged outside the hot air passage, so that the auxiliary air duct can not only transmit hot air, but also play a good heat preservation role on the drying section, thereby further improving the drying efficiency of the drying section. A grain discharging section is connected below the drying section, the grain discharging section is provided with an inlet for receiving the grains flowing down from the drying section and a discharging path for discharging the grains. A negative pressure ventilation pipe is connected between the auxiliary air duct and the grain discharging section, so that the negative pressure hot air source can not only provide the drying function for the drying section, but also effectively utilize the negative pressure suction to remove the dust in the grain discharging section.

Description

Technical Field

[0001] This invention relates to the technical field of grain dryers, and more specifically to a dust removal device for a batch circulating mixed-flow dryer. Background Technology

[0002] Batch-type circulating mixed-flow dryers are high-efficiency, multi-functional grain drying equipment. Their working principle involves introducing grain into the dryer body while simultaneously injecting hot air. During heat exchange, the hot air evaporates the moisture on the outside of the grain, and the resulting moisture is then drawn out by a negative pressure fan. Through continuous heating and exhaust circulation, the moisture content of the grain gradually decreases, ultimately achieving the desired drying effect. Generally, batch-type circulating mixed-flow dryers adopt a tower structure, consisting of core components such as a tempering section, a drying section, a grain discharge section, a conveying auger, and an elevator.

[0003] Regarding the design of the grain discharge section, reference can be made to the grain discharge tee of the grain dryer with patent number CN202320748387.3. This grain discharge section is equipped with a grain discharge wheel and a bucket elevator. The top of the grain discharge section is a grain discharge wheel structure, and the bottom is a bucket elevator structure. Both elevator structures are used to receive the grain discharged from the grain discharge wheel. Specifically, in the accompanying drawings of the patent, the grain discharge bucket of the bucket elevator is designed as an inclined guide plate structure, V-shaped, and firmly welded to the steel frame of the grain discharge section. When the grain passes through the grain discharge wheel, it falls into the grain discharge bucket under the action of gravity. However, since grain often contains dust, if this dust is not removed in time when the grain hits the grain discharge bucket, it will be scattered everywhere with the grain circulation, causing dust to fly around the work site. To solve the above problem, this invention designs a dust removal device for a batch circulating mixed flow dryer to effectively control the spread of dust. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a dust removal device for a batch circulating mixed-flow dryer. An auxiliary channel is connected to the grain discharge section via a negative pressure ventilation pipe. Simultaneously, the hot air channel and the auxiliary channel cleverly share a negative pressure hot air source. This allows the negative pressure hot air source to provide drying functionality to the drying section while effectively using negative pressure suction to remove dust from the grain discharge section. Furthermore, the auxiliary channel is cleverly installed outside the hot air channel, enabling it to transmit hot air while also providing good insulation for the drying section, thereby further improving drying efficiency.

[0005] To achieve the above objectives, the dust removal device for the batch circulating mixed-flow dryer used in this invention includes:

[0006] The drying section has a hot air channel for drying grains. An auxiliary air duct is provided on the side of the hot air channel, and the hot air channel and the auxiliary air duct share the same negative pressure hot air source. Since the auxiliary air duct is cleverly installed on the outside of the hot air channel, it can also play a good role in heat preservation of the drying section while transmitting hot air, thereby further improving the drying efficiency of the drying section.

[0007] A discharge section is connected below the aforementioned drying section, the discharge section having an inlet for receiving grain flowing down from the drying section and a discharge path for discharging the grain.

[0008] The negative pressure ventilation pipe connects the aforementioned auxiliary channel and the aforementioned grain discharge section, so that the grain discharge section, the negative pressure ventilation pipe, the auxiliary channel, and the negative pressure hot air source form a suction path. This allows the negative pressure hot air source to provide drying function for the drying section while also effectively using negative pressure suction to remove dust from the grain discharge section.

[0009] As a further detailed description of the above solution, the negative pressure ventilation pipe includes a straight section connecting the auxiliary channel and an inclined section connecting the straight section and the grain discharge section. An inclined inlet is provided at the connection between the inclined section and the grain discharge section. An inclined baffle is installed on the top of the inclined inlet. The inclined baffle is parallel to the inclined inlet and its vertical projection covers the inclined inlet. Through the coordinated operation of the inclined inlet and the inclined baffle, the falling grain is prevented from being directly sucked into the negative pressure ventilation pipe, ensuring the separation of dust and grain.

[0010] To further prevent grain from being sucked into the negative pressure ventilation pipe, the present invention installs a magnetic suction component at the aforementioned inclined inlet, wherein:

[0011] The magnetic suction assembly includes a first annular plate and a second annular plate arranged along the suction path, at least two air guide plates connecting the first annular plate and the second annular plate, the second annular plate being sealed, the first annular plate having a vent in the middle and a mesh plate connected to the vent, a third annular plate being provided between the first annular plate and the second annular plate and the third annular plate being located on the sealed path of the first annular plate falling, the third annular plate being fixed to the inner wall of the negative pressure ventilation pipe;

[0012] The lower surface of the third annular plate is provided with a first electromagnet, and the upper surface of the first annular plate is provided with a first annular magnetic block. When the first electromagnet is energized, the first electromagnet and the first annular magnetic block are magnetically attracted to each other.

[0013] The above structure cleverly utilizes magnetic components. Under normal conditions, the second annular plate falls and seals the air intake path under the action of gravity, preventing dust inside the negative pressure ventilation pipe from falling back into the grain discharge section. In the working state, under the action of the negative pressure hot air source, the second annular plate rises, the first electromagnet is energized, and the first electromagnet and the first annular magnetic block are magnetically attracted. At this time, the dust in the exhaust section can only enter the ventilation pipe through the mesh plate and be filtered by the mesh plate, preventing grain from entering the negative pressure ventilation pipe.

[0014] As a further optimization of the above scheme, a support plate is also installed on the second annular plate to create a gap between the second annular plate and the third annular plate. When the second annular plate is in a sealed state, the support plate contacts the third annular plate and forms a sealed space with the second annular plate, the support plate, and the third annular plate. The upper surface of the third plate is recessed downward to form an annular pit. The top of the pit has triangular recesses arranged in a circular array. The support plate and the pit are a mating structure, and the lower surface of the support plate has protrusions that are mating structures with the recesses.

[0015] In the above structure, the second and third annular plates are kept at a certain distance by the support plate, which ensures the stability and structural strength between the two annular plates, while facilitating the airflow to enter the gap and suck up the second annular plate. At the same time, the combination of the pit and the protrusion can effectively increase the connection stability and torque transmission capacity between the support plate and the third plate, prevent relative movement or rotation, and ensure the sealing effect of the enclosed space.

[0016] In this invention, the number of magnetic suction components is at least two, and the two magnetic suction components are arranged sequentially along the suction path. The mesh size of the magnetic suction components decreases sequentially along the suction path, thereby more effectively capturing and filtering dust. When dust in the grain discharge section is sucked into the negative pressure ventilation pipe, it can be filtered finely step by step, thereby significantly reducing the amount of dust sucked into the negative pressure hot air source, ensuring the cleanliness of the negative pressure hot air source and the overall operating efficiency of the grain dryer, extending the service life of the negative pressure hot air source, and ensuring the long-term stable operation of the grain dryer.

[0017] As a further option to the above scheme, it also includes:

[0018] A guide rod passes through the magnetic suction assembly along the suction path and guides the magnetic suction assembly to move along the guide rod. The rod body inside the magnetic suction assembly is equipped with a cleaning brush. The cleaning brush includes bristles arranged in a circular pattern at equal intervals, and the outer surface of the bristles contacts the air guide plate. The guide rod and the magnetic suction assembly are rotatably coupled. The input end of the guide rod is connected to a drive motor. The lower surface of the cleaning brush is located on the rising path of the perforated plate. During the rising process of the magnetic suction assembly, the guide rod performs the guiding action while the bristles on the guide rod effectively clean the air guide plate. At the same time, the bristles adopt a spirally spaced arrangement structure to optimize airflow, reduce obstruction to the suction path, make the suction action smoother, and can adsorb dust on the suction path.

[0019] Furthermore, when the magnetic suction component is in operation, the brush bristles come into contact with the screen. At this time, the drive motor drives the guide rod to rotate, which in turn drives the brush bristles to rotate, enabling them to thoroughly and effectively clean the screen. This ensures the continuous cleaning of the screen and helps maintain the overall performance and lifespan of the equipment.

[0020] The dust removal device for the batch-type circulating mixed-flow dryer of the present invention has the following beneficial effects:

[0021] 1. The dust removal device for the batch circulating mixed flow dryer of the present invention cleverly connects the auxiliary channel and the grain discharge section through a negative pressure ventilation pipe. At the same time, the hot air channel and the auxiliary channel share a negative pressure hot air source, so that the negative pressure hot air source can provide the necessary drying function for the drying section, while using its negative pressure suction to effectively remove the dust generated in the grain discharge section, thereby maintaining the cleanliness and efficient operation of the system.

[0022] In addition, the auxiliary channel is carefully arranged on the outside of the hot air channel, which allows the auxiliary channel to smoothly transmit hot air while providing good heat preservation for the drying section, further improving the drying efficiency.

[0023] 2. The dust removal device for the batch circulating mixed-flow dryer of the present invention cleverly utilizes a magnetic suction component to achieve effective dust management and grain protection. Under normal conditions, i.e., in the non-working state, the second annular plate falls naturally under the action of gravity, tightly sealing the air intake path and effectively preventing dust inside the negative pressure ventilation pipe from falling back into the grain discharge section, thereby keeping the grain discharge section clean;

[0024] In operation, when the negative pressure hot air source is activated, the second annular plate rises. At this time, the first electromagnet is energized, attracting the first annular magnetic block and ensuring structural stability and sealing. In this operating state, dust in the exhaust section can only enter the ventilation duct through the mesh plate, which acts as a filter, allowing only dust to pass through while preventing grain from entering the negative pressure ventilation duct. This ensures effective dust removal, effectively preventing grain loss and greatly improving the efficiency and safety of the entire system.

[0025] 3. In the batch circulating mixed-flow dryer dust removal device of the present invention, during the upward movement of the magnetic suction assembly, the guide rod not only serves a guiding function, but its attached bristles also undertake the task of cleaning the air guide plate. The bristles are designed with a spirally spaced arrangement, which significantly optimizes the airflow efficiency, reduces obstruction to the suction path, and makes the suction process smoother. Furthermore, the bristle structure effectively adsorbs and removes dust from the suction path.

[0026] Furthermore, when the magnetic suction assembly enters the working state, the brush bristles naturally come into contact with the mesh panel. At this stage, the drive motor activates, causing the guide rod to rotate, which in turn drives the brush bristles to rotate. The rotating bristles achieve a comprehensive and deep cleaning of the mesh panel, ensuring its continuous cleanliness, improving the operating efficiency of the negative pressure ventilation duct, and extending the overall service life of the equipment.

[0027] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0028] Figure 1 A schematic diagram of the dust removal device for a batch-type circulating mixed-flow dryer;

[0029] Figure 2 This is a schematic diagram of the negative pressure ventilation pipe in this invention;

[0030] Figure 3 In this invention Figure 2 Enlarged structural diagram at point A;

[0031] Figure 4 This is a schematic diagram of the magnetic suction component in this invention;

[0032] Figure 5 This is a schematic diagram of the guide rod structure in this invention;

[0033] Figure 6 This is a schematic diagram of the cleaning brush in this invention;

[0034] Figure 7 This is a schematic diagram of the structure of the third annular plate in this invention;

[0035] Figure 8 This is a schematic diagram of the structure of the bristle part in this invention.

[0036] In the diagram: 1. Drying section; 11. Hot air passage; 12. Auxiliary passage; 13. Negative pressure hot air source; 2. Grain discharge section; 3. Negative pressure ventilation pipe; 31. Straight section; 32. Inclined section; 321. Inclined inlet; 322. Inclined baffle; 4. Magnetic suction assembly; 41. First annular plate; 411. Ventilation opening; 412. Mesh plate; 413. First annular magnet; 42. Second annular plate; 421. Support plate; 422. Protrusion; 43. Air guide plate; 44. Third annular plate; 441. First electromagnet; 442. Dent; 443. Recess; 5. Guide rod; 6. Cleaning brush; 61. Brush bristles. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0038] It should be noted that when an element is referred to as "set on" or "provided with" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this document. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Please refer to the instruction manual appendix. Figure 1-8 The present invention provides a first embodiment of a dust removal device for a batch circulating mixed-flow dryer, which mainly includes the following parts:

[0041] Drying section 1 is equipped with a hot air channel 11. In this embodiment, the hot air channel 11 has a roughly rectangular structure and is specifically used for drying grains. Preferably, in this embodiment, the hot air channel 11 adopts a mixed-flow drying structure. In this embodiment, auxiliary channels 12 are provided on both sides of the hot air channel 11, and the auxiliary channels 12 are arranged parallel to the hot air channel 11. In this embodiment, the hot air channel 11 and the auxiliary channels 12 are both connected to the same negative pressure hot air source 13 through air ducts. Therefore, while effectively transmitting hot air, the auxiliary channels 12 provide additional heat preservation for the drying section 1, further improving the drying effect of the drying section 1.

[0042] The grain discharge section 2 is located below the drying section 1. The main function of the grain discharge section 2 is to receive the grain flowing down from the drying section 1 and provide an outlet for the grain to be discharged. Specifically, the lower part of the grain discharge section 2 is the lifting hopper.

[0043] The negative pressure ventilation pipe 3 is the core component of this dust removal device. It connects the auxiliary channel 12 and the grain discharge section 2, thereby creating a suction path. This allows the negative pressure hot air source 13 to effectively remove dust from the grain discharge section 2 while providing drying function for the drying section 1.

[0044] More specifically, the negative pressure ventilation pipe 3 is connected to the lifting bucket of the grain discharge section 2.

[0045] As a further possible solution to the above scheme, the negative pressure ventilation pipe 3 includes a straight section 31 and an inclined section 32. The straight section 31 is connected to the auxiliary channel 12, while the inclined section 32 is connected to the grain discharge section 2, and an inclined inlet 321 is provided at the connection. In order to prevent falling grain from being directly sucked into the negative pressure ventilation pipe 3, an inclined baffle 322 is installed on the top of the inclined inlet 321. The baffle is parallel to the inclined inlet 321, and its vertical projection can completely cover the inclined inlet 321, thereby ensuring effective separation of dust and grain.

[0046] Please refer to the instruction manual appendix. Figure 1-8 The present invention provides a second embodiment of a dust removal device for a batch circulating mixed-flow dryer, which mainly includes the following parts:

[0047] Drying section 1 has a hot air channel 11 for drying grains. The hot air channel 11 is provided with an auxiliary air duct on its side, and the hot air channel 11 and the auxiliary air duct 12 share the same negative pressure hot air source 13. Since the auxiliary air duct 12 is cleverly installed on the outside of the hot air channel 11, the auxiliary air duct 12 can also play a good heat preservation role for the drying section 1 while transmitting hot air, thereby further improving the drying efficiency of the drying section 1.

[0048] The grain discharge section 2 is connected below the drying section 1. The grain discharge section 2 has an inlet for receiving grain flowing down from the drying section 1 and a discharge path for discharging the grain.

[0049] The negative pressure ventilation pipe 3 connects the auxiliary channel 12 and the grain discharge section 2 to form a negative pressure dust suction path with the grain discharge section 2, the negative pressure ventilation pipe 3, the auxiliary channel 12 and the negative pressure hot air source 13. This allows the negative pressure hot air source 13 to effectively remove dust from the grain discharge section 2 while providing drying function for the drying section 1.

[0050] As a further detailed description of the above solution, the negative pressure ventilation pipe 3 includes a straight section 31 connecting the auxiliary channel 12 and an inclined section 32 connecting the straight section 31 and the grain discharge section 2. An inclined inlet 321 is provided at the connection between the inclined section 32 and the grain discharge section 2. An inclined baffle 322 is installed on the top of the inclined inlet 321. The inclined baffle 322 is parallel to the inclined inlet 321 and the vertical projection of the inclined baffle 322 covers the inclined inlet 321. Through the coordinated cooperation of the inclined inlet 321 and the inclined baffle 322, the falling grain is prevented from being directly sucked into the negative pressure ventilation pipe 3, ensuring the separation of dust and grain.

[0051] There are also some examples where the straight section 31 and the inclined section 32 are designed as separate structures, and the inclined section 32 and the grain discharge section 2 are designed as separate structures, such as flange sealing structures.

[0052] To further prevent grain from being drawn into the negative pressure ventilation pipe 3, this embodiment installs a magnetic suction component 4 at the inclined inlet 321 of the aforementioned negative pressure ventilation pipe 3, wherein:

[0053] The magnetic suction assembly 4 consists of a first annular plate 41, a second annular plate 42, and multiple air guide plates 43. Preferably, in this embodiment, there are 6 air guide plates 43. The second annular plate 42 is designed to be sealed, while the middle part of the first annular plate 41 is provided with a ventilation opening 411, which is connected to a mesh plate 412.

[0054] In addition, a third annular plate 44 is provided between the first annular plate 41 and the second annular plate 42. The third annular plate 44 is fixed to the inner wall of the negative pressure ventilation pipe 3, for example, by welding. The third annular plate 44 is located on the sealed path of the first annular plate 41 as it falls. When the device is in normal operation, the second annular plate 42 will fall under the action of gravity, thereby sealing the air intake path and preventing dust inside the negative pressure ventilation pipe 3 from falling back into the grain discharge section 2.

[0055] In detail, the lower surface of the third annular plate 44 is provided with a first electromagnet 441, and the upper surface of the first annular plate 41 is provided with a first annular magnetic block 413. When the first electromagnet 441 is energized, the first electromagnet 441 and the first annular magnetic block 413 are magnetically attracted to each other.

[0056] When the dust removal device is in operation, the negative pressure hot air source 13 will cause the second annular plate 42 to rise. At the same time, the first electromagnet 441 is energized and magnetically attracts the first annular magnetic block 413, ensuring that dust can only enter the ventilation duct through the mesh plate 412, thereby effectively preventing grain from entering the negative pressure ventilation duct 3.

[0057] Another possible example is that the upper surface of the third annular plate 44 is provided with a second electromagnet, and the lower surface of the second annular plate 42 is provided with a second annular magnetic block. When the second electromagnet is energized, the second electromagnet and the second annular magnetic block are magnetically repulsive.

[0058] When the dust removal device is in operation, the negative pressure hot air source 13 will cause the second annular plate 42 to rise. At the same time, the second electromagnet is energized and generates magnetic repulsion with the second annular magnetic block, providing an upward repulsive force for the second annular plate 42, which facilitates the separation of the second annular plate 42 from the third annular plate 44. At the same time, the existence of this repulsive force can prevent the second annular plate 42 from falling under the action of gravity, thus achieving magnetic levitation.

[0059] To enhance structural stability and airtightness, a support plate 421 is also installed on the second annular plate 42, which maintains a certain distance between the second annular plate 42 and the third annular plate 44. When the second annular plate 42 is in a sealed state, the support plate 421 contacts the third annular plate 44, thereby forming a sealed space. The upper surface of the third annular plate 44 is also designed with annular recesses 442, and the top of the recesses 442 is provided with triangular recesses 443 arranged in a ring array. The support plate 421 and the aforementioned recesses 442 are mating structures, and the lower surface of the support plate 421 is provided with protrusions 422 that mate with the recesses 443, thereby significantly enhancing the connection stability.

[0060] In addition, in some examples, the present invention also employs at least two magnetic suction components 4, which are arranged sequentially along the suction path, and the mesh size of their mesh plate 412 decreases sequentially along the suction path, effectively capturing and filtering dust, ensuring the cleanliness of the negative pressure hot air source 13 and the overall operating efficiency of the grain dryer.

[0061] Please refer to the instruction manual appendix. Figure 1-8 The present invention provides a second embodiment of a dust removal device for a batch circulating mixed-flow dryer, which mainly includes the following parts:

[0062] Drying section 1, which has a hot air channel 11 for drying grains, and an auxiliary air duct is provided on the side of the hot air channel 11, and the hot air channel 11 and the auxiliary channel 12 share the same negative pressure hot air source 13.

[0063] The grain discharge section 2 is connected below the drying section 1. The grain discharge section 2 has an inlet for receiving grain flowing down from the drying section 1 and a discharge path for discharging the grain.

[0064] The negative pressure ventilation pipe 3 connects the auxiliary channel 12 and the grain discharge section 2 to form an air intake path with the grain discharge section 2, the negative pressure ventilation pipe 3, the auxiliary channel 12 and the negative pressure hot air source 13. The negative pressure ventilation pipe 3 includes a straight part 31 connecting the auxiliary channel 12 and an inclined part 32 connecting the straight part 31 and the grain discharge section 2. An inclined inlet 321 is provided at the connection between the inclined part 32 and the grain discharge section 2. An inclined baffle 322 is installed on the top of the inclined inlet 321. The inclined baffle 322 is parallel to the inclined inlet 321 and the vertical projection of the inclined baffle 322 covers the inclined inlet 321.

[0065] A magnetic suction assembly 4 is installed on the negative pressure ventilation pipe 3. The magnetic suction assembly 4 includes a first annular plate 41 and a second annular plate 42 arranged along the air suction path. At least two air guide plates 43 connect the first annular plate 41 and the second annular plate 42. The second annular plate 42 is sealed. The first annular plate 41 has a ventilation opening 411 in the middle and a mesh plate 412 is connected to the ventilation opening 411. A third annular plate 44 is provided between the first annular plate 41 and the second annular plate 42 and is located on the sealed path of the first annular plate 41 falling. The third annular plate 44 is fixed to the inner wall of the negative pressure ventilation pipe 3. A first electromagnet 441 is provided on the lower surface of the third annular plate 44, and a first annular magnet 413 is provided on the upper surface of the first annular plate 41. When the first electromagnet 441 is energized, the first electromagnet 441 and the first annular magnet 413 are magnetically attracted to each other.

[0066] Guide rod 5 passes through magnetic suction assembly 4 sequentially along the suction path and guides the magnetic suction assembly 4 to move along guide rod 5.

[0067] In some examples, the guide rod 5 located inside the magnetic assembly 4 has a cleaning brush 6. This cleaning brush 6 consists of bristles 61 arranged in a circular, equally spaced pattern. The outer surface of the bristles 61 contacts the air guide plate 43. When the magnetic assembly 4 rises, the guide rod 5 not only serves as a guide, but the bristles 61 on it also effectively clean the air guide plate 43. When the magnetic assembly 4 is in operation, the bristles 61 contact the mesh plate 412. At this time, the guide rod 5 is driven to rotate by a drive motor, thereby causing the bristles 61 to rotate and thoroughly clean the mesh plate 412.

[0068] In more detail, in this embodiment, the guide rod 5 and the magnetic attraction component 4 are rotatably coupled, and the movement of the magnetic attraction component 4 will not cause the guide rod 5 to move.

[0069] It should be noted that in this embodiment, the guide rod 5 passes through the negative pressure ventilation pipe 3, and the drive motor is installed outside the negative pressure ventilation pipe 3.

[0070] In the batch circulating mixed-flow dryer dust removal device provided in this embodiment, the cooperative working principle of the negative pressure ventilation pipe 3 and the magnetic suction component 4 is as follows:

[0071] S1. The negative pressure ventilation pipe 3 connects the auxiliary channel 12 and the grain discharge section 2 to form a suction path, so that the negative pressure hot air source 13 can provide drying function for the drying section 1 while using negative pressure suction to remove dust in the grain discharge section 2.

[0072] S2. The inclined part 32 of the negative pressure ventilation pipe 3 is designed with an inclined inlet 321. The top of the inclined inlet 321 is equipped with an inclined baffle 322 to ensure that falling grains are not directly sucked into the negative pressure ventilation pipe 3, thereby achieving effective separation of dust and grains.

[0073] S3. Install a magnetic suction component 4 at the inclined inlet 321. Under normal conditions, due to gravity, the second annular plate 42 falls and seals the suction path, preventing dust inside the negative pressure ventilation pipe 3 from falling back into the grain discharge section 2;

[0074] S4. When the negative pressure hot air source 13 is working, the second annular plate 42 is lifted, and at the same time the first electromagnet 441 is energized, generating a magnetic attraction with the first annular magnetic block 413, ensuring that dust can only enter the ventilation duct through the mesh plate 412. In this way, the dust is filtered by the mesh plate 412, while the grain is prevented from entering the negative pressure ventilation duct 3.

[0075] In the dust removal device for the batch circulating mixed-flow dryer provided in this embodiment, the working principle of the magnetic suction component 4 is as follows:

[0076] S1. The second annular plate 42 and the third annular plate 44 are kept apart by the support plate 421, which ensures the stability and strength of the structure, and at the same time facilitates the airflow to suck up the second annular plate 42.

[0077] S2. The mating structure of the recess 442 and the protrusion 422 enhances the connection stability and torque transmission capability between the support plate 421 and the third annular plate 44;

[0078] S3. The magnetic suction components 4 are arranged sequentially along the suction path, and the mesh size of its mesh plate 412 gradually decreases, thereby more effectively capturing and filtering dust.

[0079] In the dust removal device for the batch circulating mixed-flow dryer provided in this embodiment, the working principle of the guide rod 5 and the cleaning brush 6 is as follows:

[0080] S1. Guide rod 5 passes through magnetic assembly 4 to provide guidance;

[0081] S2. The cleaning brush 6 on the guide rod 5 is designed with a bristle part 61. When the magnetic suction assembly 4 rises, the bristle part 61 will clean the air guide plate 43.

[0082] S3. The spirally spaced arrangement of the bristles 61 optimizes airflow, reduces obstruction of the suction path, and can adsorb dust on the path.

[0083] S4. When the magnetic suction assembly 4 is in working condition, the bristle part 61 contacts the mesh plate 412. At this time, the guide rod 5 is driven to rotate by the drive motor, which in turn drives the bristle part 61 to rotate, thus thoroughly cleaning the mesh plate 412 and ensuring the continuous cleanliness of the mesh plate 412.

[0084] In summary, the present invention cleverly connects the auxiliary channel 12 to the grain discharge section 2 through the negative pressure ventilation pipe 3. At the same time, the hot air channel 11 and the auxiliary channel 12 share the negative pressure hot air source 13, so that the negative pressure hot air source 13 can provide the necessary drying function for the drying section 1, while using its negative pressure suction to effectively remove the dust generated in the grain discharge section 2, thereby maintaining the cleanliness and efficient operation of the system.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust removal device for a batch-type circulating mixed-flow dryer, characterized in that, include: Drying section (1), which has a hot air channel (11) for drying grains, and an auxiliary air channel is provided on the side of the hot air channel (11) and the auxiliary channel (12) share the same negative pressure hot air source (13). The grain discharge section (2) is connected below the drying section (1) and has an inlet for receiving grain flowing down from the drying section (1) and a discharge path for discharging the grain. Negative pressure ventilation pipe (3) connects the above-mentioned auxiliary channel (12) and the above-mentioned grain discharge section (2) so that the grain discharge section (2), negative pressure ventilation pipe (3), auxiliary channel (12) and negative pressure hot air source (13) form a suction path; A magnetic suction assembly (4) is installed on the negative pressure ventilation pipe (3), wherein: The magnetic suction assembly (4) includes a first annular plate (41) and a second annular plate (42) arranged along the suction path. At least two air guide plates (43) connect the first annular plate (41) and the second annular plate (42). The second annular plate (42) is sealed. The first annular plate (41) has a vent (411) in the middle and a mesh plate (412) is connected to the vent (411). A third annular plate (44) is provided between the first annular plate (41) and the second annular plate (42) and the third annular plate (44) is located on the sealed path of the second annular plate (42) falling. The third annular plate (44) is fixed on the inner wall of the negative pressure ventilation pipe (3). The lower surface of the third annular plate (44) is provided with a first electromagnet (441), and the upper surface of the first annular plate (41) is provided with a first annular magnetic block (413). When the first electromagnet (441) is energized, the first electromagnet (441) and the first annular magnetic block (413) are magnetically attracted to each other.

2. The dust removal device for a batch circulating mixed-flow dryer according to claim 1, characterized in that: The negative pressure ventilation pipe (3) includes a straight section (31) connecting the auxiliary channel (12) and an inclined section (32) connecting the straight section (31) and the grain discharge section (2). An inclined inlet (321) is provided at the connection between the inclined section (32) and the grain discharge section (2). An inclined baffle (322) is installed on the top of the inclined inlet (321). The inclined baffle (322) is parallel to the inclined inlet (321) and the vertical projection of the inclined baffle (322) covers the inclined inlet (321).

3. The dust removal device for a batch circulating mixed-flow dryer according to claim 2, characterized in that: The second annular plate (42) is also equipped with a support plate (421) that provides a distance between the second annular plate (42) and the third annular plate (44). When the second annular plate (42) is in a closed state, the support plate (421) contacts the third annular plate (44) and forms a closed space with the second annular plate (42), the support plate (421) and the third annular plate (44).

4. The dust removal device for a batch circulating mixed-flow dryer according to claim 3, characterized in that: The upper surface of the third annular plate (44) is recessed downward (443) to form an annular pit (442). The top of the pit (442) is provided with a triangular pit (443) arranged in an annular array. The support plate (421) and the pit (442) are a matching structure, and the lower surface of the support plate (421) is provided with a protrusion (422) that matches the pit (443).

5. The dust removal device for a batch circulating mixed-flow dryer according to claim 4, characterized in that: The number of magnetic suction components (4) is at least two, and the two magnetic suction components (4) are arranged sequentially along the suction path.

6. The dust removal device for a batch circulating mixed-flow dryer according to claim 5, characterized in that: The mesh size of the magnetic suction component (4) decreases sequentially along the suction path.

7. The dust removal device for a batch circulating mixed-flow dryer according to claim 6, characterized in that: Also includes: The guide rod (5) passes through the magnetic suction assembly (4) along the suction path and guides the magnetic suction assembly (4) to move along the guide rod (5).

8. The dust removal device for a batch circulating mixed-flow dryer according to claim 7, characterized in that: The guide rod (5) is provided with a cleaning brush (6) in the rod body part inside the magnetic suction assembly (4). The cleaning brush (6) includes bristle parts (61) arranged in a circular shape at equal intervals, and the outer surface of the bristle parts (61) is in contact with the air guide plate (43). The lower surface of the cleaning brush (6) is located on the rising path of the mesh plate (412).

9. The dust removal device for a batch-type circulating mixed-flow dryer according to claim 8, characterized in that: The guide rod (5) is rotatably coupled with the magnetic suction assembly (4), and the input end of the guide rod (5) is connected to a drive motor.

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