Centrifugal spray drier with built-in filter

Abstract

The utility model discloses a centrifugal spray drier with built-in filtering device relates to centrifugal spray drier technical field, including drying machine frame body and erecting in drying machine frame body's dryer and control cabinet, the frame body of drying machine frame body is provided with filter cartridge, and the one end intercommunication of filter cartridge has waste gas pipe, and waste gas pipe is linked together with the waste gas export of dryer, and the other end intercommunication of filter cartridge has the connecting pipe, and the connecting pipe intercommunication has the air -ejecting pump, and the cartridge of filter cartridge is provided with filter assembly. The utility model discloses a filter cartridge is set up in drying machine frame body, so that the waste gas of centrifugal spray drier can be filtered after the filter cartridge after the operation of centrifugal spray drier again discharges, so that the harmful substance in the waste gas of centrifugal spray drier can be filtered and handled by activated carbon, zeolite and active alumina after the operation of centrifugal spray drier, thereby avoiding the waste gas with harmful substance direct discharge to the air, avoids the situation of causing the pollution to air environment.

Description

Technical Field

[0001] This utility model relates to the technical field of centrifugal spray dryers, specifically a centrifugal spray dryer with a built-in filter device. Background Technology

[0002] Spray drying is the most widely used process in the liquid forming and drying industry. It is best suited for producing powdered and granular solid products from solution, emulsion, suspension and paste liquid raw materials. Therefore, spray drying is an ideal process when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet precise standards.

[0003] Chinese patent CN222585566U discloses a high-speed centrifugal spray dryer with uniform spraying. It includes a dryer body, two connecting plates fixed in the middle of the dryer body, and a connecting box rotatably connected between the two connecting plates. A suction pump is fixed to the lower end of the dryer body, and a connecting pipe is connected to the suction pump and fixedly connected to the connecting box. A support plate is fixed to the dryer body, and two mounting plates are fixed to the support plate. The support plate has through holes, and an eccentric gear assembly is arranged between the two mounting plates. The eccentric gear assembly includes a first eccentric gear, a second eccentric gear, and two clamping plates. A first motor is mounted on the mounting plate. Connecting rods are rotatably connected to both sides of the second eccentric gear, and a fixed rod is fixed between the two connecting rods. A lifting rod is fixed to the fixed rod, and the bottom end of the lifting rod is rotatably connected to the connecting box. This invention allows for adjustment of the spray angle, better ensuring uniform spraying.

[0004] However, the centrifugal spray dryer disclosed in the above patent still has certain shortcomings in practical applications. Since the centrifugal spray dryer generates waste gas after the spray drying process, and the waste gas contains different harmful substances due to the different composition of the liquid material, the waste gas generated by the existing centrifugal spray dryer is mostly discharged directly through the fan, lacking a device to filter the waste gas, which can easily cause certain air pollution. Utility Model Content

[0005] The purpose of this invention is to provide a centrifugal spray dryer with a built-in filter device to solve the problem mentioned in the background art that the exhaust gas generated by existing centrifugal spray dryers is mostly discharged directly through the fan, lacking a device for filtering the exhaust gas, which easily causes certain air pollution.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a centrifugal spray dryer with a built-in filter device, including a dryer frame, a dryer mounted on the dryer frame, and a control cabinet. A filter cylinder is installed inside the dryer frame. One end of the filter cylinder is connected to an exhaust pipe, which is connected to the exhaust outlet of the dryer. The other end of the filter cylinder is connected to a connecting pipe, which is connected to a vacuum pump. A filter assembly is installed inside the filter cylinder.

[0007] Preferably, the filter assembly includes a second ring disposed in the inner cavity of the filter cylinder, three second rings are equidistantly arranged, a first ring adapted to the second ring is disposed on one side of the second ring, and a mesh is fixed to one side wall of both the first ring and the second ring. The first ring and the adjacent second ring constitute a set of filter devices, and activated carbon, zeolite and activated alumina are respectively filled between two adjacent meshes in the three sets of filter devices.

[0008] Preferably, two symmetrically distributed fixing posts are fixedly installed on one side wall of the first ring near the second ring. The surface of the fixing posts is provided with positioning holes. The side wall of the second ring near the first ring is provided with an annular groove. The cavity of the annular groove is adapted to the column body of the fixing posts, and the fixing posts are slidably connected in the cavity of the annular groove. The side wall of the second ring near the first ring is provided with a positioning groove.

[0009] Preferably, a positioning post is provided in the cavity of the positioning groove. The inner end of the positioning post movably penetrates the cavity wall of the positioning groove and extends into the cavity of the annular groove. The inner end of the positioning post is adapted to the cavity of the positioning hole. The outer end of the positioning post movably penetrates the cavity wall of the positioning groove and extends to the outside of the second ring. A circular lever is fixedly installed at the end of the outer end of the positioning post. A reset block is provided in the cavity of the positioning groove and fixedly sleeved on the surface of the positioning post. A spring is provided in the cavity of the positioning groove and sleeved on the surface of the positioning post. The spring is located on the side of the reset block away from the annular groove.

[0010] Preferably, U-shaped locking blocks are provided on both sides of the second ring, and the U-shaped locking blocks are fixedly installed in the inner wall of the filter cylinder. The first ring is also located in the clamping cavity of the adjacent U-shaped locking block.

[0011] Preferably, the surface of the filter cylinder is fitted with an arc-shaped cover, and a first fixing block is fixedly installed on both sides of the arc-shaped cover. A second fixing block is fixedly installed on both sides of the filter cylinder. A locking bolt is connected between the first fixing block and the adjacent second fixing block. A horizontal plate is fixedly installed on the frame of the dryer at the bottom of the filter cylinder. A support column is fixedly connected between the top wall of the horizontal plate and the bottom wall of the filter cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention incorporates a filter cartridge within the dryer frame. One end of the filter cartridge is connected to the dryer's exhaust outlet via a waste gas pipe, while the other end is connected to a suction pump via a connecting pipe. This allows the exhaust gas generated by the centrifugal spray dryer to be filtered before being discharged. The filter cartridge contains three sets of first and second rings, each filled with activated carbon, zeolite, and activated alumina as filter adsorption materials. This ensures that harmful substances in the exhaust gas generated by the centrifugal spray dryer are filtered out by these materials, preventing the direct release of harmful substances into the air and thus avoiding air pollution.

[0013] This invention features a fixed post on a first ring with a positioning hole, and an annular groove on a second ring to accommodate the fixed post, along with a positioning slot. This design allows for easy replacement of the filter adsorption material between the first and second rings by moving a circular lever to move the positioning post, causing it to be pulled out of the positioning hole. During this process, a reset block compresses a spring. After the positioning post is removed, the fixed post can be taken out of the annular groove, separating the first and second rings. This facilitates the replacement of the filter adsorption material between the two mesh screens, preventing a decline in filtration performance after prolonged use and ensuring effective treatment of harmful substances in exhaust gases. Attached Figure Description

[0014] Figure 1 This is a first-view structural schematic diagram of the centrifugal spray dryer with built-in filter device according to this utility model; Figure 2 This is a schematic diagram of the filter cylinder structure of the centrifugal spray dryer with built-in filtration device according to this utility model; Figure 3 This is a schematic diagram of the second ring structure of the centrifugal spray dryer with built-in filtration device of this utility model; Figure 4 This is a schematic diagram of the first annular structure of the centrifugal spray dryer with built-in filtration device of this utility model.

[0015] In the diagram: 1. Dryer frame; 2. Dryer; 3. Control cabinet; 4. Horizontal plate; 5. Filter cartridge; 6. Support column; 7. Arc-shaped cover; 8. First fixing block; 9. Second fixing block; 10. Locking bolt; 11. Exhaust gas pipe; 12. Air pump; 13. Connecting pipe; 14. U-shaped locking block; 15. First ring; 16. Second ring; 17. Mesh screen; 18. Annular groove; 19. Positioning groove; 20. Positioning column; 21. Circular lever; 22. Reset block; 23. Spring; 24. Fixing column; 25. Positioning hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 This utility model provides a technical solution: a centrifugal spray dryer with a built-in filter device, including a dryer frame 1, a dryer 2 and a control cabinet 3 mounted on the dryer frame 1, a filter cylinder 5 installed inside the dryer frame 1, an exhaust pipe 11 connected to the front end of the filter cylinder 5, the exhaust pipe 11 connected to the exhaust outlet of the dryer 2, a connecting pipe 13 connected to the rear end of the filter cylinder 5, the connecting pipe 13 connected to a vacuum pump 12, and a filter assembly installed inside the filter cylinder 5.

[0018] The filter assembly includes three second rings 16 disposed within the inner cavity of the filter cylinder 5. A first ring 15, adapted to the second ring 16, is disposed on the left side of each second ring 16, meaning the first ring 15 has the same diameter and thickness as the second ring 16. Both the first ring 15 and the second ring 16 have mesh 17 welded to their outer walls. The side wall furthest from the center of the cavity between the first ring 15 and the second ring 16 forms their outer walls. The first ring 15 and the adjacent second ring 16 constitute a filter unit. Activated carbon, zeolite, and activated alumina are respectively filled between two adjacent mesh 17 in the three filter units. Activated carbon has a highly developed pore structure and a large specific surface area, exhibiting strong adsorption capacity and effectively adsorbing various organic pollutants and odor substances. It is suitable for treating organic waste gases generated during drying processes, such as in the food, pharmaceutical, and chemical industries, and is effective in removing organic solvents, pigments, and odors from waste gases. Zeolite is an aluminosilicate mineral with a regular porous structure and uniform pore size, exhibiting selective adsorption of substances of different molecular sizes. Simultaneously, zeolite possesses good thermal and chemical stability, allowing for use at relatively high temperatures. It is commonly used to dry gases or liquids containing specific impurities; for example, in chemical production, it can be used to adsorb and separate organic molecules of different sizes, and also to remove pollutants such as ammonia nitrogen from waste gases. Activated alumina has a large specific surface area and strong adsorption capacity, showing good adsorption effects on water and acidic gases. It has high mechanical strength, good wear resistance, and is not easily broken, allowing for use under harsh working conditions. In the drying process, it is often used to adsorb moisture as a desiccant. It can also be used to treat waste gases containing acidic impurities, such as removing sulfur dioxide and hydrogen chloride from waste gases during the drying of certain chemical products. Two symmetrically distributed fixing posts 24 are welded to one side wall of the first ring 15 near the second ring 16. Positioning holes 25 are formed on the surface of the fixing posts 24. An annular groove 18 is formed on one side wall of the second ring 16 near the first ring 15. The cavity of the annular groove 18 is adapted to the body of the fixing post 24, and the fixing post 24 is slidably connected in the cavity of the annular groove 18, allowing the fixing post 24 to move along the annular groove 18. A positioning groove 19 is formed on one side wall of the second ring 16 near the first ring 15. A positioning post 20 is disposed in the cavity of the positioning groove 19. The inner end of the positioning post 20 movably penetrates the cavity wall of the positioning groove 19 and extends into the cavity of the annular groove 18. The inner end of the positioning post 20 is adapted to the cavity of the positioning hole 25, allowing the positioning post 20 to be inserted into the positioning hole 25. The end closest to the center of the second ring 16 is the inner end, and the opposite end is the outer end.The outer end of the positioning post 20 extends through the cavity wall of the positioning groove 19 and to the outside of the second ring 16. A circular lever 21 is welded to the end of the outer end of the positioning post 20. A reset block 22 is welded and sleeved on the surface of the positioning post 20 in the cavity of the positioning groove 19. A spring 23 is sleeved on the surface of the positioning post 20 in the cavity of the positioning groove 19. The spring 23 is located on the side of the reset block 22 away from the annular groove 18, so that the positioning post 20 can be automatically reset. U-shaped locking blocks 14 are provided on both the front and rear sides of the second ring 16. The U-shaped locking blocks 14 are welded to the inner cavity wall of the filter cylinder 5. The first ring 15 is also located in the clamping cavity of the adjacent U-shaped locking blocks 14, so that the first ring 15 and the second ring 16 are stably placed in the filter cylinder 5. An arc-shaped cover 7 is fitted onto the surface of the filter cartridge 5. First fixing blocks 8 are welded to both sides of the arc-shaped cover 7, and second fixing blocks 9 are welded to both sides of the filter cartridge 5. Locking bolts 10 connect the first fixing blocks 8 and the adjacent second fixing blocks 9, allowing for easy opening of the arc-shaped cover 7 by removing the locking bolts 10, thus facilitating the replacement of the filter adsorption material. A horizontal plate 4 is welded to the dryer frame 1 at the bottom of the filter cartridge 5. A support column 6 is welded between the top wall of the horizontal plate 4 and the bottom wall of the filter cartridge 5.

[0019] During operation, by starting the air pump 12, the exhaust gas generated after the dryer 2 runs can be extracted through the exhaust pipe 11 and passed through the filter cartridge 5. This allows the exhaust gas generated after the centrifugal spray dryer runs to be filtered by the filter cartridge 5 before being discharged. The filter cartridge 5 contains three sets of first rings 15 and second rings 16. The cavities formed by the mesh 17 of each of the three sets of first rings 15 and second rings 16 are filled with activated carbon, zeolite, and activated alumina respectively as filter adsorption materials, thereby improving the centrifugal spray drying process. Harmful substances in the exhaust gas generated after the machine is running can be filtered out by activated carbon, zeolite, and activated alumina, thus preventing the exhaust gas containing harmful substances from being directly emitted into the air and avoiding pollution to the air environment. By removing the locking bolt 10, the arc-shaped cover 7 can be removed from the filter cylinder 5, thereby exposing three sets of first rings 15 and second rings 16. A fixing post 24 is set on the first ring 15 and a positioning hole 25 is opened on the fixing post 24. An annular groove 1 is opened on the second ring 16 to accommodate the fixing post 24. 8. A positioning groove 19 is provided so that the first ring 15 and the second ring 16 need to be disassembled for replacement of the filter adsorption material. The circular lever 21 can be moved to move the positioning post 20, causing it to be pulled out of the positioning hole 25. During this process, the reset block 22 will compress the spring 23, allowing the positioning post 20 to automatically reset under the action of the spring 23 after it is released. After the positioning post 20 is removed, the fixing post 24 can be taken out of the annular groove 18, separating the first ring 15 and the second ring 16, thus facilitating... Replace the filter adsorption material between the two mesh screens 17 to prevent its filtration adsorption performance from declining after long-term use and affecting the treatment of harmful substances in the exhaust gas. When it is necessary to re-fix the first ring 15 and the second ring 16, pull the circular lever 21 again to move the positioning post 20 out of the annular groove 18. Then rotate the fixing post 24 along the annular groove 18 until it is aligned with the positioning post 20. Release the positioning post 20 to allow it to automatically insert into the positioning hole 25, thereby achieving a quick connection and fixation between the first ring 15 and the second ring 16.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal spray dryer with a built-in filter, comprising a dryer frame (1), a dryer (2) mounted on the dryer frame (1), and a control cabinet (3), characterized in that: The dryer frame (1) is equipped with a filter cylinder (5). One end of the filter cylinder (5) is connected to an exhaust pipe (11), which is connected to the exhaust outlet of the dryer (2). The other end of the filter cylinder (5) is connected to a connecting pipe (13), which is connected to a vacuum pump (12). The filter cylinder (5) is equipped with a filter assembly inside.

2. The centrifugal spray dryer with a built-in filter device according to claim 1, characterized in that: The filter assembly includes a second ring (16) disposed in the inner cavity of the filter cylinder (5). Three second rings (16) are equidistantly arranged. A first ring (15) adapted to the second ring (16) is disposed on one side of the second ring (16). A mesh (17) is fixed on one side wall of the first ring (15) and the second ring (16). The first ring (15) and the adjacent second ring (16) constitute a set of filter devices. Activated carbon, zeolite and activated alumina are respectively filled between two adjacent meshes (17) in the three sets of filter devices.

3. The centrifugal spray dryer with a built-in filter device according to claim 2, characterized in that: Two symmetrically distributed fixing posts (24) are fixedly installed on one side wall of the first ring (15) near the second ring (16). The surface of the fixing post (24) is provided with positioning holes (25). The side wall of the second ring (16) near the first ring (15) is provided with an annular groove (18). The cavity of the annular groove (18) is adapted to the column of the fixing post (24), and the fixing post (24) is slidably connected in the cavity of the annular groove (18). The side wall of the second ring (16) near the first ring (15) is provided with a positioning groove (19).

4. The centrifugal spray dryer with a built-in filter device according to claim 3, characterized in that: A positioning post (20) is provided in the cavity of the positioning groove (19). The inner end of the positioning post (20) moves through the cavity wall of the positioning groove (19) and extends into the cavity of the annular groove (18). The inner end of the positioning post (20) is adapted to the cavity of the positioning hole (25). The outer end of the positioning post (20) moves through the cavity wall of the positioning groove (19) and extends to the outside of the second ring (16). A circular lever (21) is fixedly installed at the end of the outer end of the positioning post (20). A reset block (22) is fixedly sleeved on the surface of the positioning post (20) in the cavity of the positioning groove (19). A spring (23) is sleeved on the surface of the positioning post (20) in the cavity of the positioning groove (19). The spring (23) is located on the side of the reset block (22) away from the annular groove (18).

5. The centrifugal spray dryer with a built-in filter device according to claim 2, characterized in that: The second ring (16) is provided with U-shaped blocks (14) on both sides. The U-shaped blocks (14) are fixedly installed in the inner wall of the filter cylinder (5). The first ring (15) is also located in the clamping cavity of the adjacent U-shaped blocks (14).

6. The centrifugal spray dryer with a built-in filter device according to claim 5, characterized in that: The filter cylinder (5) is fitted with an arc-shaped cover (7) on its cylindrical surface. A first fixing block (8) is fixedly installed on both sides of the arc-shaped cover (7). A second fixing block (9) is fixedly installed on both sides of the filter cylinder (5). A locking bolt (10) is connected between the first fixing block (8) and the adjacent second fixing block (9). A horizontal plate (4) is fixedly installed on the frame of the dryer frame (1) at the bottom of the filter cylinder (5). A support column (6) is fixedly connected between the top wall of the horizontal plate (4) and the bottom wall of the filter cylinder (5).

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