Multi-channel uniform distribution type drying sterilization structure

Abstract

The application belongs to the technical field of drying sterilization, and particularly relates to a multi-channel uniform distribution type drying sterilization structure, which comprises a machine body arranged horizontally and capable of rotating forward and reversely, a plurality of material channels arranged horizontally in the machine body, an air inlet pipe arranged at one end of the machine body close to a feeding end, a heat insulation and material guiding device arranged at the one end of the machine body close to the feeding end, the heat insulation and material guiding device being arranged around the air inlet pipe and being communicated with the feeding end of the material channel, a plurality of air isolation devices arranged on the inner wall of the machine body, a ventilation hole being arranged on the air isolation device close to a discharging end and used for allowing hot flue gas in the machine body to enter the air isolation device, a hot flue gas outlet being arranged on the outer wall of the machine body and close to the feeding end and used for discharging the hot flue gas in the air isolation device. The machine body is rotated forward and reversely to realize drying and sterilization of the material respectively, the drying process and the sterilization process are considered, the hot flue gas is indirectly contacted with the material, the material pollution is avoided, and the product quality and the use performance are ensured.

Description

Technical Field

[0001] This invention belongs to the field of drying and sterilization technology, specifically a multi-channel uniformly distributed drying and sterilization structure. Background Technology

[0002] Diatomaceous earth is a siliceous sedimentary rock formed primarily from the remains of ancient diatoms through complex physicochemical transformations, with silicon dioxide as its main component. Due to its unique porous framework structure, high specific surface area, and excellent adsorption properties, it is widely used in filtration and purification, adsorption carriers, building materials, and environmental protection. However, wet-purified diatomaceous earth filter cakes have high moisture content, high viscosity, and are prone to agglomeration. Furthermore, as a heat-sensitive material, excessively high drying temperatures or prolonged heating times can cause micropore collapse and a decrease in pore volume and specific surface area, directly affecting the performance of the finished product. In addition, diatomaceous earth raw materials and processing can easily carry microorganisms. While conventional drying and calcination are sufficient for general industrial products, high-end applications such as food, pharmaceuticals, and medical applications have strict limitations on microbial quality control, requiring sterilization. Existing sterilization processes often use high temperatures, which can damage the microporous structure of diatomaceous earth, weakening its adsorption and filtration capabilities; low-temperature sterilization, on the other hand, suffers from incomplete sterilization, making it difficult to balance hygiene requirements with product performance. Therefore, developing a device that combines drying and sterilization is of great significance for expanding the high-end application scenarios of diatomaceous earth and ensuring product quality and safety. Summary of the Invention

[0003] To address the problems mentioned above, this invention provides a multi-channel uniformly distributed drying and sterilization structure. By rotating the machine forward and backward, the material is dried and sterilized, thus combining the drying and sterilization processes. Furthermore, the hot flue gas comes into indirect contact with the material, avoiding material contamination and ensuring product quality and performance.

[0004] This invention provides a multi-channel uniformly distributed drying and sterilization structure, comprising a horizontally arranged body capable of forward and reverse rotation. The body contains multiple horizontally arranged material channels, one end of which is a feeding end and the other end a discharging end. An air inlet pipe is located near the feeding end of the body, extending into the body and situated between the material channels. A heat-insulating material guiding device is also located near the feeding end of the body, surrounding the air inlet pipe and communicating with the feeding end of the material channels. Multiple air-blocking devices are arranged on the inner wall of the body, positioned between adjacent material channels. Ventilation holes are provided near the discharging end of each air-blocking device to allow hot flue gas from inside the body to enter the device. A hot flue gas outlet is located near the feeding end of the outer wall of the body to discharge the hot flue gas from the air-blocking devices.

[0005] Furthermore, multiple spirally arranged reverse guide plates are fixedly connected to the inner wall of the material outlet end of the material channel.

[0006] Furthermore, the heat-insulating material guiding device includes an end plate, a front-end perforated plate, and a feeding guide plate. The end plate is located at the end of the machine body and is fixedly connected to the machine body. The front-end perforated plate is fixed at the feeding end of the material channel. The feeding guide plate is disposed between the end plate and the front-end perforated plate to guide the material into the material channel.

[0007] Furthermore, the heat-insulating material guiding device also includes a heat-insulating pipe disposed within the machine body, the heat-insulating pipe being fixed between the end plate and the front tube sheet, and the feeding guide plate being fixed between the end plate, the heat-insulating pipe, and the front tube sheet.

[0008] Furthermore, multiple lifting plates are evenly arranged on the inner wall of the material channel along the circumference of the material channel.

[0009] Furthermore, the machine body is provided with a tail sealing device near the discharge end. The tail sealing device includes three rear end plates. The first and third rear end plates are fixedly connected to the inner wall of the machine body, and the second rear end plate is fixedly connected to the outer wall of the material channel. The three rear end plates form a radial labyrinth sealing structure.

[0010] Furthermore, the air-insulating device includes a partition plate with bent ends. The two ends of the partition plate are fixedly connected to the inner wall of the machine body. A cavity for the flow of heated flue gas is formed between the partition plate and the inner wall of the machine body. The ventilation hole is located on the partition plate and near the discharge end.

[0011] Furthermore, the connection between the feed end of the material channel and the air inlet pipe is arranged in a reverse flow shape.

[0012] Furthermore, three air baffles are arranged axially between the outer walls of the multiple material channels. The first and third air baffles are the first air baffles and are located in the middle of the multiple material channels. The second air baffle is the second air baffle and is located near the middle of the material channel in the axial direction. The second air baffle is arranged around the material channel.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention achieves material drying and sterilization by rotating the machine forward and backward respectively, taking into account both drying and sterilization processes. Moreover, the hot flue gas comes into indirect contact with the material, avoiding material contamination and ensuring product quality and performance.

[0014] (2) Whether the machine rotates forward and the material moves from the feed end to the discharge end, or the machine rotates backward and the material moves from the discharge end to the feed end, the material will be thrown and lifted by the lifting plate when it moves in the material channel, thus forming a material curtain, which is more conducive to the drying and sterilization of the material.

[0015] (3) The function of the first baffle plate is to allow the hot flue gas to diffuse and flow around the material channel, ensuring that the outer surface of the material channel can be heated evenly; the function of the second baffle plate is to allow the hot flue gas to converge from the periphery to the center. Therefore, under the action of the three baffle plates, the hot flue gas first diffuses from the center to the periphery through the first baffle plate, then converges from the periphery to the center through the second baffle plate, and finally diffuses from the center to the periphery through the third baffle plate, thus forming an S-shaped flow path of the hot flue gas, which enables the material channel to be heated more evenly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a half-section of the body; Figure 2 for Figure 1 Sectional view of BB; Figure 3 for Figure 1 Enlarged diagram of section C; Figure 4 This is a side view of the air-insulating device; Figure 5 for Figure 4 Sectional view of AA; Figure 6 This is a structural diagram of the front-end perforated plate; Figure 7 This is a schematic diagram of the structure of the first windbreak panel; Figure 8 This is a schematic diagram of the second windbreak panel; Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Material channel; 3. Air inlet pipe; 4. Insulated material guide device; 40. End plate; 41. Front tube sheet; 42. Feed guide plate; 43. Insulated pipe; 5. Air baffle device; 50. Partition plate; 6. Ventilation hole; 7. Hot flue gas outlet; 8. Reverse guide plate; 9. Lifting plate; 10. Tail sealing device; 100. Rear tube sheet; 11. First air baffle plate; 12. Second air baffle plate. Detailed Implementation

[0018] The technical solutions in 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 protection scope of the present invention.

[0019] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The invention is described in detail with specific embodiments.

[0020] Reference Figures 1-8 This invention provides a multi-channel uniformly distributed drying and sterilization structure, including a horizontally arranged body 1 capable of forward and reverse rotation. The body 1 contains multiple horizontally arranged material channels 2. In this embodiment, there are four material channels 2 made of heat-resistant stainless steel. Both ends of each material channel 2 are open, one end being the inlet and the other the outlet. Figure 1 As shown, in this embodiment, the left end of the material channel 2 is the feeding end, and the right end is the discharging end. An air inlet pipe 3 is provided at the end of the machine body 1 near the feeding end. The air inlet pipe 3 extends into the machine body 1 and is located between multiple material channels 2. The air inlet pipe 3 is used to transport high-temperature hot flue gas into the machine body 1. A heat-insulating material guiding device 4 is also provided at the end of the machine body 1 near the feeding end. The heat-insulating material guiding device 4 is arranged around the air inlet pipe 3 and communicates with the feeding end of the material channel 2. The material enters the material channel 2 through the heat-insulating material guiding device 4. Multiple air-blocking devices 5 are provided on the inner wall of the machine body 1. The air-blocking devices 5 are located between two adjacent material channels 2. Ventilation holes 6 are opened near the discharging end of the air-blocking devices 5 to allow the hot flue gas inside the machine body 1 to enter the air-blocking devices 5. A hot flue gas outlet 7 is opened on the outer wall of the machine body 1. The hot flue gas outlet 7 is located near the feeding end to discharge the hot flue gas in the air-blocking devices 5.

[0021] Multiple spirally arranged reverse guide plates 8 are fixedly connected to the inner wall of the discharge end of the material channel 2. When the machine body 1 rotates forward, the material moves from the feed end to the discharge end in the material channel 2. Due to the setting of the reverse guide plates 8, the material cannot be discharged directly from the discharge end when it moves to the discharge end, but returns to the material channel 2. Therefore, the function of the reverse guide plates 8 is to prevent the material from being discharged directly from the discharge end during the drying process when the machine body 1 rotates forward.

[0022] The heat-insulating material guiding device 4 includes an end plate 40, a front perforated plate 41, and a feed guide plate 42. The end plate 40 is located at the end of the machine body 1 and is fixedly connected to the machine body 1. The front perforated plate 41 is fixed to the feed end of the material channel 2. The feed guide plate 42 is disposed between the end plate 40 and the front perforated plate 41 and is also spirally arranged to guide the material into the material channel 2. In this invention, the material enters the heat-insulating material guiding device 4 through a feeding chute. The feeding chute is prior art in this field and therefore will not be described in detail and is not shown in the figure.

[0023] The heat-insulating material guiding device 4 also includes a heat-insulating pipe 43 disposed within the machine body 1. The heat-insulating pipe 43 is fixed between the end plate 40 and the front tube sheet 41, and there is a certain distance between the heat-insulating pipe 43 and the inner wall of the machine body 1. This distance is usually set at 80-120mm, and preferably 94mm in this embodiment. The feed guide plate 42 is fixed between the end plate 40, the heat-insulating pipe 43, and the front tube sheet 41. Due to the setting of the heat-insulating pipe 43, the heat-insulating material guiding device 4 and the machine body 1 form a double-cylinder structure, thereby preventing the machine body 1 from deforming due to excessive temperature. In addition, the heat-insulating material guiding device 4 is made of heat-resistant stainless steel. The heat-insulating material guiding device 4 can not only ensure that the material enters the material channel 2 smoothly through the feed guide plate 42 and prevent material spillage and leakage, but also prevent hot flue gas from overflowing from the front end, ensuring that all hot flue gas is discharged from the hot flue gas outlet 7.

[0024] Multiple lifting plates 9 are evenly arranged on the inner wall of the material channel 2 along the circumference of the material channel 2. Whether the machine body 1 rotates forward and the material moves from the feed end to the discharge end, or the machine body 1 rotates backward and the material moves from the discharge end to the feed end, the material will be thrown and lifted by the lifting plates 9 when it moves in the material channel 2, thus forming a material curtain, which is more conducive to the drying and sterilization of the material.

[0025] The machine body 1 is provided with a tail sealing device 10 near the discharge end. The tail sealing device 10 includes three rear end tube plates 100. The first and third rear end tube plates 100 are fixedly connected to the inner wall of the machine body 1, and the second rear end tube plate 100 is fixedly connected to the outer wall of the material channel 2. The three rear end tube plates 100 form a radial labyrinth sealing structure to prevent hot flue gas from overflowing from the discharge end.

[0026] An air-insulating device 5 is installed between the inner wall of the machine body 1 and the material channel 2. The air-insulating device 5 includes a partition plate 50 with bent ends. The two ends of the partition plate 50 are fixedly connected to the inner wall of the machine body 1, forming a cavity for the flow of heated flue gas between the partition plate 50 and the inner wall of the machine body 1. Ventilation holes 6 are installed on the partition plate 50 and are close to the discharge end. In this embodiment, there are also four air-insulating devices 5. The four air-insulating devices 5 tightly clamp the four material channels 2, thereby ensuring that the material channels 2 rotate at the same speed as the machine body 1 during operation.

[0027] The connection between the feed end of the material channel 2 and the air inlet pipe 3 is arranged in a reverse flow shape, which not only guides the hot flue gas into the space between the outer walls of the material channel 2, but also allows the material to enter the interior of the material channel 2 quickly.

[0028] Three baffles are axially arranged between the outer walls of multiple material channels 2. The first and third baffles are the first baffles 11, which are located in the middle of the multiple material channels 2. The function of the first baffles 11 is to allow hot flue gas to diffuse and flow to the periphery of the material channels 2, ensuring that the outer surface of the material channels 2 can be heated evenly. The second baffles 12 are located near the middle of the material channels 2 in the axial direction. The second baffles 12 are located around the material channels 2. The function of the second baffles 12 is to allow hot flue gas to converge from the periphery to the center. Therefore, under the action of the three baffles, the hot flue gas first diffuses from the center to the periphery through the first baffle, then converges from the periphery to the center through the second baffle, and finally diffuses from the center to the periphery through the third baffle, thus forming an S-shaped flow path of hot flue gas, which enables the material channels 2 to be heated more evenly.

[0029] A certain gap is left between the multiple material channels 2. The gap is usually set at 20-40mm, and preferably 34mm in this embodiment, so that the hot flue gas can surround and heat the outside of all the material channels 2, and the heating effect of the material channels 2 is better.

[0030] The working principle of this invention is as follows: During the drying and sterilization process, the machine body 1 is horizontally positioned. During the drying process, the machine body 1 rotates clockwise. As the machine body 1 slowly rotates, 550°C hot flue gas enters the machine body 1 through the air inlet pipe 3. Simultaneously, diatomaceous earth with a certain moisture content enters the heat-insulating material guiding device 4 through the feeding chute, and then quickly enters each material channel 2 through the feeding guide plate 42. Within the material channel 2, the diatomaceous earth is continuously thrown up and down by the lifting plates 9, forming a material curtain layer. The hot flue gas continuously heats the outside of the material channel 2, creating a continuous heat conduction to the internal diatomaceous earth, causing the moisture inside the diatomaceous earth to continuously precipitate out. At this time, water vapor is discharged from the discharge end. The hot flue gas after the drying process enters the air-insulating device 5 through the ventilation holes 6, thus completing the drying process. During the drying process, since the hot flue gas and diatomaceous earth are in indirect contact, the hot flue gas does not affect the quality of the diatomaceous earth during the drying process.

[0031] After drying, the machine body 1 is reversed to begin sterilization. At this time, the hot flue gas supply of the air inlet pipe 3 is turned off, and the internal temperature of the machine body 1 is controlled at about 400℃. As the temperature decreases, the machine body 1 rotates slowly, and diatomaceous earth is continuously sprinkled in the material channel 2, so that the bacteria inside are completely eliminated. At the same time, all the hot flue gas is slowly discharged from the cavity between the partition plate 50 and the inner wall of the machine body 1 through the hot flue gas outlet 7, thus completing the sterilization process.

[0032] It should be noted that when the machine body 1 is placed horizontally, due to the setting of the reverse guide plate 8, the material cannot be discharged from the discharge end by rotating the machine body 1. Therefore, a lifting cylinder is set near the feeding end of the machine body 1 to lift the feeding end of the machine body 1. The lifting cylinder is also existing technology in this field, so it will not be described in detail and is not shown in the figure. After the drying and sterilization process is completed, the lifting cylinder lifts the feeding end of the machine body 1 at a certain angle, and the machine body 1 will be tilted. Then the machine body 1 rotates forward to move the material from the feeding end to the discharge end, and the material can be discharged from the discharge end, thus realizing the discharge of the material. In addition, the rotation of the machine body 1 is achieved by the motor driving the reducer, the reducer driving the gear, and the gear driving the machine body 1 to rotate. Therefore, the axis of the machine body 1 itself is the rotation axis of the machine body 1, and the forward and reverse rotation of the machine body 1 is achieved by the forward and reverse rotation of the motor, such as Figure 2 As shown, rotating the body 1 counterclockwise is the forward rotation, and rotating it clockwise is the reverse rotation. The above are conventional methods in this field, so they will not be described in detail.

[0033] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the nature and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention.

Claims

1. A multi-channel uniformly distributed drying and sterilization structure, characterized in that, The machine includes a horizontally arranged body capable of forward and reverse rotation. The body contains multiple horizontally arranged material channels, one end of which is a feed end and the other end is a discharge end. An air inlet pipe is located near the feed end of the body, extending into the interior of the body and situated between the multiple material channels. A heat-insulating material guiding device is also located near the feed end of the body, surrounding the air inlet pipe and communicating with the feed end of the material channels. Multiple air-blocking devices are located on the inner wall of the body, situated between adjacent material channels. Ventilation holes are provided near the discharge end of each air-blocking device to allow hot flue gas from inside the body to enter the air-blocking device. A hot flue gas outlet is located near the feed end on the outer wall of the body to discharge the hot flue gas from the air-blocking devices. Multiple spirally arranged reverse guide plates are fixedly connected to the inner wall of the discharge end of the material channel; when the machine body rotates forward, the material moves from the feed end to the discharge end in the material channel and then returns to the material channel. Multiple lifting plates are evenly arranged on the inner wall of the material channel along the circumference of the material channel. The lifting plates cause the material to be thrown and lifted up as it moves in the material channel, forming a material curtain. Three baffles are arranged axially between the outer walls of the multiple material channels. The first and third baffles are the first baffles and are located in the middle of the multiple material channels. The second baffle is the second baffle and is located near the middle of the material channel in the axial direction. The second baffle is arranged around the material channel to form an S-shaped flow path for the hot flue gas. During the drying process, the machine rotates clockwise; after drying, the machine rotates counterclockwise to begin sterilization.

2. The multi-channel uniformly distributed drying and sterilization structure according to claim 1, characterized in that, The heat-insulating material guiding device includes an end plate, a front-end perforated plate, and a feeding guide plate. The end plate is located at the end of the machine body and is fixedly connected to the machine body. The front-end perforated plate is fixed to the feeding end of the material channel. The feeding guide plate is disposed between the end plate and the front-end perforated plate to guide the material into the material channel.

3. The multi-channel uniformly distributed drying and sterilization structure according to claim 2, characterized in that, The heat-insulating material guiding device also includes a heat-insulating pipe disposed in the machine body. The heat-insulating pipe is fixed between the end plate and the front tube plate, and the feeding guide plate is fixed between the end plate, the heat-insulating pipe and the front tube plate.

4. The multi-channel uniformly distributed drying and sterilization structure according to claim 1, characterized in that, The machine body is provided with a tail sealing device near the discharge end. The tail sealing device includes three rear end plates. The first and third rear end plates are fixedly connected to the inner wall of the machine body, and the second rear end plate is fixedly connected to the outer wall of the material channel. The three rear end plates form a radial labyrinth sealing structure.

5. The multi-channel uniformly distributed drying and sterilization structure according to claim 1, characterized in that, The air-insulating device includes a partition plate with bent ends. The two ends of the partition plate are fixedly connected to the inner wall of the machine body. A cavity for the flow of heated flue gas is formed between the partition plate and the inner wall of the machine body. The ventilation hole is located on the partition plate and near the discharge end.

6. The multi-channel uniformly distributed drying and sterilization structure according to claim 1, characterized in that, The connection between the feed end of the material channel and the air inlet pipe is arranged in a reverse flow shape.

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