Spray granulation and sieving iron removal integrated device

Abstract

The utility model discloses a spray granulation and sieving deironing integrated device, which belongs to the technical field of spray granulation, and comprises a spray dryer and a vibrating screen, a powder collector is arranged between the spray dryer and the vibrating screen, and the powder collector comprises a stock bin, a first electromagnetic valve and a second electromagnetic valve; the stock bin comprises a feed port and a discharge port; the first electromagnetic valve is arranged between the feeding hole and the spray dryer; and the second electromagnetic valve is arranged between the discharge port and the vibrating screen. In the spray granulation process, the first electromagnetic valve is opened, the second electromagnetic valve is closed, product particles can fall into the stock bin, after the spray granulation machine operates for a period of time, the first electromagnetic valve is closed, the second electromagnetic valve is opened, the product particles in the stock bin enter the vibrating screen for material drying and iron removal, and at the moment, the granulation environment in the spray dryer can gradually return to the optimal state; and waiting for the next continuous spray granulation operation.

Description

Technical Field

[0001] The utility model relates to a spray granulation technology, and more specifically to an integrated device for spray granulation and iron removal by screening. Background Art

[0002] High-purity alumina ceramics are widely used in mechanical components, electronic components, and microwave induction plates due to their high purity, good density, high strength, heat resistance, corrosion resistance, and wear resistance. However, when impurities or iron impurities are present, alumina ceramics may develop localized blue or red spots, affecting the purity and strength of the ceramics and limiting their application areas. Therefore, the control of impurities and iron impurities is crucial in the preparation of alumina powder. Existing screening and iron removal devices require that the prepared granulated powder be collected and shipped to the screening and iron removal device before iron removal can be performed. This is labor-intensive, time-consuming, and labor-intensive. Furthermore, there is only one manual valve at the bottom of the spray drying tower, and manual discharge is required every 10 minutes of granulation, which is extremely inconvenient.

[0003] For example: Chinese patent announcement number CN206008644U, announcement date March 15, 2017, the name of the utility model is a spray granulator, the application discloses a spray granulation technology, including a slurry supply device, an atomizing device, a granulation chamber and a heating device for heating the granulation chamber, the slurry supply device is connected to the atomizing device through a feeding pipe, the atomizing device is arranged at the top of the cavity of the granulation chamber, the bottom of the granulation chamber is provided with a discharge port, a screening device is provided below the discharge port of the granulation chamber, an iron removal device is provided below the screening device, and a material receiving container is provided below the iron removal device. This solution sequentially arranges a screening device and an iron removal device below the granulation chamber, and the screening and iron removal operations can be automatically performed after spray granulation. The obtained ceramic capacitor dielectric porcelain particles can be directly used to make ceramic capacitor dielectric chips, without the need for screening and iron removal, thereby improving work efficiency and saving labor. Although this solution realizes the continuous operation of spray granulation and iron removal, since the spray granulation chamber and the iron removal device are always connected, it is easy to cause the pressure and temperature in the spray granulation chamber to fail to meet the requirements, affecting product quality. Utility Model Content

[0004] The utility model overcomes the problem that the production parameter indicators of the spray granulation device cannot be met after the existing spray granulation and screening iron removal are combined, and provides an integrated device for spray granulation and screening iron removal. This solution can combine the processes of spray granulation and screening iron removal, and can ensure that the granulation environment in the spray dryer meets product requirements, thereby improving product quality.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a spray granulation and screening iron removal integrated device, comprising a spray dryer and a vibrating screen, a powder collector is provided between the spray dryer and the vibrating screen, the powder collector comprises a silo, a first solenoid valve and a second solenoid valve; the silo comprises a feed port and a discharge port; the first solenoid valve is provided between the feed port and the spray dryer; the second solenoid valve is provided between the discharge port and the vibrating screen. In this solution, the spray dryer can produce product particles, and the powder collector can collect the product particles in the silo, and finally send the product in the silo to the vibrating screen for iron removal, wherein the first solenoid valve and the second solenoid valve can control the product particles to enter or exit the silo. During the spray granulation process, the first solenoid valve is opened and the second solenoid valve is closed, and the product particles will fall into the silo. After a period of operation, the first solenoid valve is closed and the second solenoid valve is opened, and the product particles in the silo enter the vibrating screen for screening and iron removal. At this time, the temperature and pressure in the spray dryer can gradually return to the optimal state, waiting for the next spray granulation operation. This solution combines the processes of spray granulation and iron removal by screening, and can ensure that the granulation environment in the spray dryer meets product requirements and improve product quality.

[0006] Preferably, the silo includes a silo cover and a silo body, wherein the silo cover is detachably connected to the silo body, and the feed port is provided on the silo cover. The detachable connection between the silo cover and the silo body facilitates cleaning of the silo body.

[0007] Preferably, the bin cover is conical, and a plurality of heat dissipation holes are annularly distributed on the conical surface of the bin cover. The heat dissipation holes on the bin cover can dissipate heat brought into the silo by the product, thereby preventing heat accumulation in the silo from causing excessively high temperatures that may affect product performance or cause product particles to stick together.

[0008] Preferably, the bottom of the silo is conical and is integrally formed with the discharge port. The bottom of the silo is designed to be conical with a larger top and a smaller bottom, which is conducive to the introduction of product particles into the vibrating screen and prevents pile-up in the silo.

[0009] Preferably, the bin body is provided with a viewing window, which allows operators to observe the status of the product particles in the bin body.

[0010] Preferably, the second solenoid valve is connected to the vibrating screen with a flexible connection. Since the vibrating screen generates strong vibrations, in order to prevent the vibration of the vibrating screen from affecting the spray dryer, a flexible connection is required between the second solenoid valve and the vibrating screen to ensure that the spray granulation process is not affected.

[0011] Preferably, the vibrating screen includes a screening layer, and the screening layer is provided with a waste opening. During the iron removal operation, waste materials such as iron filings will remain in the screening layer of the vibrating screen and will eventually be discharged from the waste opening.

[0012] Preferably, the vibrating screen further comprises a collecting layer, wherein the collecting layer is provided with a collecting port, and the collecting port is connected to a collecting device. Finally, qualified product particles will enter the collecting layer and finally enter the collecting device from the collecting port.

[0013] Preferably, the silo is further provided with a distribution rack, which is detachably fixed to a side of the silo near the silo cover. The distribution rack is capable of performing a first distribution operation on the product particles produced by the spray dryer, separating particles that are stuck together. After the first solenoid valve is opened, the product particles fall from the spray dryer outlet and collide with the distribution rack, separating any stuck particles.

[0014] Preferably, the feed frame is a rod-shaped bracket, including a radial bracket and a circumferential bracket, wherein the radial bracket and the circumferential bracket are integrally connected. The feed frame is composed of a round rod-shaped bracket to prevent product particles from remaining on the feed frame. The radial bracket and the circumferential bracket are connected together to effectively increase the feed frame area and improve feed efficiency.

[0015] Compared with the existing technology, the beneficial effects of the present invention are: (1) the present solution can combine the processes of spray granulation and iron removal by screening, and can ensure that the granulation environment in the spray dryer meets the product requirements and improves the product quality; (2) it can reduce the adhesion rate of product particles and improve the output of the product; (3) the structure is simple and easy to implement, saving a lot of labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram from another perspective of the present invention.

[0018] Figure 3 This is a schematic diagram of the silo of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the material distribution rack of the present utility model.

[0020] In the figure: 1. Spray dryer, 2. Vibrating screen, 3. Silo, 4. Feed port, 5. Discharge port, 6. First solenoid valve, 7. Second solenoid valve, 8. Silo cover, 9. Silo body, 10. Heat dissipation holes, 11. Visual window, 12. Screening layer, 13. Collection layer, 14. Waste port, 15. Collection port, 16. Distribution rack, 17. Radial support, 18. Circumferential support, 19. Support step. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be further described below with reference to specific embodiments and in conjunction with the accompanying drawings.

[0022] Example 1: Figures 1 to 3 The device shown is an integrated spray granulation and screening iron removal device, comprising a spray dryer 1, a powder collector and a vibrating screen 2, and the three are arranged in sequence from top to bottom; the spray dryer is used for spray granulation to produce product granule semi-finished products, the powder collector is used for temporarily storing the generated product granule semi-finished products, and the vibrating screen 2 can screen the product granule semi-finished products to remove iron and form product granules.

[0023] Specifically, the powder collector includes a silo 3, a first solenoid valve 6, and a second solenoid valve 7. The powder collector is arranged from top to bottom in the following order: the first solenoid valve 6, the silo 3, and the second solenoid valve 7. The silo 3 includes a silo cover 8 and a silo body 9. The feed port 4 of the silo 3 is located at the top of the silo cover 8, and the discharge port 5 is located at the bottom of the silo body 9. A first solenoid valve 6 is located above the feed port 4 and is connected to the outlet of the spray dryer 1. A second solenoid valve 7 is located below the discharge port 5 and is connected to the feed port of the vibrating screen 2. The silo 3 is cylindrical in shape, with a diameter of 30 cm and a height of 30 cm, and can accommodate 15 kg of semi-finished product particles.

[0024] During operation, in the initial state, after the granulation environment within the spray dryer 1 meets the requirements, the spray granulation operation begins. The first solenoid valve 6 below the spray dryer 1 is open, and the second solenoid valve 7 at the bottom of the silo 3 is closed. The semi-finished product granules fall from the output end of the spray dryer 1 into the silo 3. After 10 minutes of operation, the first solenoid valve 6 is controlled to be closed and the second solenoid valve 7 is controlled to be open. The semi-finished product granules in the silo 3 fall into the vibrating screen 2 for screening and iron removal. Finally, the finished product granules are obtained and collected. During the screening and iron removal operation, since the first solenoid valve 6 is closed, the temperature and air pressure within the spray dryer 1 can gradually return to the granulation requirements, maintaining a good granulation environment. In this solution, by switching the first solenoid valve 6 and the second solenoid valve 7 in turn, the spray dryer 1 can create a favorable granulation environment, improving product quality. On the other hand, it combines the two processes of spray granulation and screening and iron removal, improving the efficiency of spray granulation and saving labor costs.

[0025] It should be noted that the first solenoid valve 6 and the second solenoid valve 7 can be switched in turn through circuit control, and the spray granulation time and the screening iron removal time can be designed according to actual needs to ensure that the granulation environment is in a good condition.

[0026] The silo body 9 and the silo cover 8 are detachably connected. During the spray granulation and sieving and iron removal operations, the silo cover 8 needs to be installed on the silo body 9. Specifically, the silo cover 8 and the silo body 9 can be fitted in a snap-fit manner, which makes installation and removal very convenient and does not affect the spray granulation collection and sieving and iron removal operations. The silo cover 8 is a conical cover structure that is small at the top and large at the bottom. The top of the silo cover 8 is the feed port 4 of the silo 3. Several rows of heat dissipation holes 10 are provided on the conical surface of the silo cover 8. In this embodiment, there are three rows of heat dissipation holes 10, and each row of heat dissipation holes 10 is distributed in an annular manner on the silo cover 8. After the first solenoid valve 6 is opened, the semi-finished product particles dropped from the output end of the spray granulator 1 still have a certain amount of heat. As the amount of semi-finished product particles increases, the temperature in the silo 3 will gradually increase, which is not conducive to the cooling of the product particles and is likely to cause the product particles to stick together. Therefore, some heat dissipation holes 10 are provided on the silo cover 8 to dissipate the temperature in the silo 3 in a timely manner. In addition, arranging the heat dissipation holes 10 on the bin cover 8 can prevent product particles from escaping from the heat dissipation holes 10 .

[0027] At the bottom of the silo 9 is the discharge port 5 of the silo 3. The bottom of the silo 9 is designed as a conical surface with a larger top and a smaller bottom. The discharge port 5 is located at the bottom of the conical surface. The discharge port 5 and the silo 9 are integrally formed. The conical structure of the silo 9 facilitates the introduction of the semi-finished product particles in the silo 3 into the vibrating screen 2, preventing the semi-finished product particles from accumulating in the silo 3 and reducing the output efficiency of the product.

[0028] A viewing window 11 is also provided on the silo 9. The viewing window 11 is a rectangular window. A sealing plate is detachably connected to the viewing window 11. By opening the sealing plate, the product particles inside the silo 9 can be observed, so that the production status can be understood in a timely manner. Alternatively, the sealing plate can be designed as a transparent panel structure, so that the product particles and semi-finished products in the silo 3 can be observed at any time without having to frequently open and close the sealing plate.

[0029] It should be noted that the connection between the silo 3 and the vibrating screen 2 is a flexible connection. Specifically, a plastic nylon sleeve can be used to connect the discharge port 5 at the bottom of the silo body 9 and the input end of the second solenoid valve 7. When the second solenoid valve 7 is opened, the semi-finished product granules in the silo 3 pass from the silo body through the flexible connection and the second solenoid valve 7 in sequence, and then enter the vibrating screen 2. The use of a flexible connection can prevent the vibration of the vibrating screen 2 from affecting the spray dryer 1, ensuring the normal operation of the spray granulation process.

[0030] In this embodiment, the vibrating screen 2 includes a screening layer 12 and a receiving layer 13. The screening layer 12 is arranged above the receiving layer 13. A waste port 14 is provided in the screening layer 12. When the semi-finished product particles enter the vibrating screen 2, they first reach the screening layer 12. After vibrating and screening the material in the screening layer 12, qualified product particles enter the receiving layer 13, while impurities such as iron filings and unqualified particles that stick together remain in the screening layer 13 and are finally discharged through the waste port 14. A receiving port 15 is provided in the receiving layer 13. The receiving port 15 is connected to a collection device (not shown in the figure). Specifically, the collection device can be a collection box or a collection bag. Qualified product particles will eventually enter the receiving layer 13 and be collected in the collection device.

[0031] It should be noted that an iron remover (not shown in the figure) is provided at the receiving layer 13. The iron remover can be specifically a plurality of magnet bars arranged at intervals, and two layers are provided, which can greatly improve the iron removal efficiency. In addition, in this solution, the mesh size of the screening layer 2 is 400 mesh, and the power of the vibrating screen 2 during operation is 50HZ. In addition, in addition to being able to perform screening work, the screening layer 12 can also shake off some of the semi-finished product particles that are stuck together to form qualified product particles, thereby improving the output rate.

[0032] Example 2: Figures 1 to 4 The device shown is an integrated spray granulation and screening iron removal device, comprising a spray dryer 1, a powder collector and a vibrating screen 2, and the three are arranged in sequence from top to bottom; the spray dryer is used for spray granulation to produce product granule semi-finished products, the powder collector is used for temporarily storing the generated product granule semi-finished products, and the vibrating screen 2 can screen the product granule semi-finished products to remove iron and form product granules.

[0033] Specifically, the powder collector includes a silo 3, a first solenoid valve 6, and a second solenoid valve 7. The powder collector is arranged from top to bottom in the following order: the first solenoid valve 6, the silo 3, and the second solenoid valve 7. The silo 3 includes a silo cover 8 and a silo body 9. The feed port 4 of the silo 3 is located at the top of the silo cover 8, and the discharge port 5 is located at the bottom of the silo body 9. A first solenoid valve 6 is located above the feed port 4 and is connected to the outlet of the spray dryer 1. A second solenoid valve 7 is located below the discharge port 5 and is connected to the feed port of the vibrating screen 2. The silo 3 is cylindrical in shape, with a diameter of 30 cm and a height of 30 cm, and can accommodate 15 kg of semi-finished product particles.

[0034] During operation, in the initial state, after the granulation environment within the spray dryer 1 meets the requirements, the spray granulation operation begins. The first solenoid valve 6 below the spray dryer 1 is open, and the second solenoid valve 7 at the bottom of the silo 3 is closed. The semi-finished product granules fall from the output end of the spray dryer 1 into the silo 3. After 10 minutes of operation, the first solenoid valve 6 is controlled to be closed and the second solenoid valve 7 is controlled to be open. The semi-finished product granules in the silo 3 fall into the vibrating screen 2 for screening and iron removal. Finally, the finished product granules are obtained and collected. During the screening and iron removal operation, since the first solenoid valve 6 is closed, the temperature and air pressure within the spray dryer 1 can gradually return to the granulation requirements, maintaining a good granulation environment. In this solution, by switching the first solenoid valve 6 and the second solenoid valve 7 in turn, the spray dryer 1 can create a favorable granulation environment, improving product quality. On the other hand, it combines the two processes of spray granulation and screening and iron removal, improving the efficiency of spray granulation and saving labor costs.

[0035] It should be noted that the first solenoid valve 6 and the second solenoid valve 7 can be switched in turn through circuit control, and the spray granulation time and the screening iron removal time can be designed according to actual needs to ensure that the granulation environment is in a good condition.

[0036] The silo body 9 and the silo cover 8 are detachably connected. During the spray granulation and sieving and iron removal operations, the silo cover 8 needs to be installed on the silo body 9. Specifically, the silo cover 8 and the silo body 9 can be fitted in a snap-fit manner, which makes installation and removal very convenient and does not affect the spray granulation collection and sieving and iron removal operations. The silo cover 8 is a conical cover structure that is small at the top and large at the bottom. The top of the silo cover 8 is the feed port 4 of the silo 3. Several rows of heat dissipation holes 10 are provided on the conical surface of the silo cover 8. In this embodiment, there are three rows of heat dissipation holes 10, and each row of heat dissipation holes 10 is distributed in an annular manner on the silo cover 8. After the first solenoid valve 6 is opened, the semi-finished product particles dropped from the output end of the spray granulator 1 still have a certain amount of heat. As the amount of semi-finished product particles increases, the temperature in the silo 3 will gradually increase, which is not conducive to the cooling of the product particles and is likely to cause the product particles to stick together. Therefore, some heat dissipation holes 10 are provided on the silo cover 8 to dissipate the temperature in the silo 3 in a timely manner. In addition, arranging the heat dissipation holes 10 on the bin cover 8 can prevent product particles from escaping from the heat dissipation holes 10 .

[0037] At the bottom of the silo 9 is the discharge port 5 of the silo 3. The bottom of the silo 9 is designed as a conical surface with a larger top and a smaller bottom. The discharge port 5 is located at the bottom of the conical surface. The discharge port 5 and the silo 9 are integrally formed. The conical structure of the silo 9 facilitates the introduction of the semi-finished product particles in the silo 3 into the vibrating screen 2, preventing the semi-finished product particles from accumulating in the silo 3 and reducing the output efficiency of the product.

[0038] A material distribution rack 16 is also provided in the silo 9. The material distribution rack 16 is a round rod-shaped bracket. Figure 4 As shown, the distribution rack 16 includes a radial bracket 17 and a circumferential bracket 18. The radial bracket 17 and the circumferential bracket 18 are fixed together by welding to form a circular ring bracket as a whole. The distribution rack 16 can perform the first distribution operation on the semi-finished product particles produced by the spray dryer 1, and separate some particles that are stuck together. After the first solenoid valve 6 is opened, the product particles fall from the outlet of the spray dryer 1 and collide with the distribution rack 16. If the particles are stuck, they will be separated. The distribution rack 16 is composed of a round rod-shaped bracket, which can prevent the semi-finished product particles from remaining on the distribution rack 16. The radial bracket 17 and the circumferential bracket 18 are connected together, which can effectively increase the area of the distribution rack 16 and improve the distribution efficiency.

[0039] It should be noted that the feed rack 16 is embedded in the interior of the silo 9. Specifically, a support step 19 is provided in the silo 9 to vertically support the feed rack 16. In this solution, the feed rack 16 is fixed rather than rotating and stirring, which can prevent the rotation and stirring of the feed rack 16 from damaging the newly formed semi-finished product particles.

[0040] A viewing window 11 is also provided on the silo 9. The viewing window 11 is a rectangular window. A sealing plate is detachably connected to the viewing window 11. By opening the sealing plate, the product particles inside the silo 9 can be observed, so that the production status can be understood in a timely manner. Alternatively, the sealing plate can be designed as a transparent panel structure, so that the product particles and semi-finished products in the silo 3 can be observed at any time without having to frequently open and close the sealing plate.

[0041] It should be noted that the connection between the silo 3 and the vibrating screen 2 is a flexible connection. Specifically, a plastic nylon sleeve can be used to connect the discharge port 5 at the bottom of the silo body 9 and the input end of the second solenoid valve 7. When the second solenoid valve 7 is opened, the semi-finished product granules in the silo 3 pass from the silo body through the flexible connection and the second solenoid valve 7 in sequence, and then enter the vibrating screen 2. The use of a flexible connection can prevent the vibration of the vibrating screen 2 from affecting the spray dryer 1, ensuring the normal operation of the spray granulation process.

[0042] In this embodiment, the vibrating screen 2 includes a screening layer 12 and a receiving layer 13. The screening layer 12 is arranged above the receiving layer 13. A waste port 14 is provided in the screening layer 12. When the semi-finished product particles enter the vibrating screen 2, they first reach the screening layer 12. After vibrating and screening the material in the screening layer 12, qualified product particles enter the receiving layer 13, while impurities such as iron filings and unqualified particles that stick together remain in the screening layer 12 and are finally discharged through the waste port 14. A receiving port 15 is provided in the receiving layer 13. The receiving port 15 and the waste port 14 are staggered. A collection device (not shown in the figure) is connected to the outside of the receiving port 15. Specifically, the collection device can be a collection box or a collection bag. Qualified product particles will eventually enter the receiving layer 13 and be collected in the collection device.

[0043] It should be noted that an iron remover (not shown in the figure) is provided at the receiving layer 13. The iron remover can be specifically a plurality of magnet bars arranged at intervals, and two layers are provided, which can greatly improve the iron removal efficiency. In addition, in this solution, the mesh size of the screening layer 2 is 400 mesh, and the power of the vibrating screen 2 during operation is 50HZ. In addition, in addition to being able to perform screening work, the screening layer 12 can also shake off some of the semi-finished product particles that are stuck together to form qualified product particles, thereby improving the output rate.

Claims

1. A spray granulation and screening iron removal integrated device, characterized in that: It includes a spray dryer and a vibrating screen, wherein a powder collector is provided between the spray dryer and the vibrating screen, and the powder collector includes Silo; Including feed port and discharge port; a first solenoid valve, disposed between the feed port and the spray dryer; The second solenoid valve is arranged between the discharge port and the vibrating screen.

2. The integrated spray granulation and screening iron removal device according to claim 1, characterized in that: The silo comprises a silo cover and a silo body, the silo cover is detachably connected to the silo body, and the feed port is arranged on the silo cover.

3. The integrated device for spray granulation and iron removal by screening according to claim 2, characterized in that: The bin cover is in a cone shape, and a plurality of heat dissipation holes are distributed in an annular manner on the cone surface of the bin cover.

4. The integrated spray granulation and screening iron removal device according to claim 2, characterized in that: The bottom of the bin body is conical and is integrally formed with the discharge port.

5. The integrated spray granulation and screening iron removal device according to any one of claims 2 to 4, characterized in that: A visual window is provided on the warehouse body.

6. The integrated spray granulation and screening iron removal device according to any one of claims 1 to 4, characterized in that: The connection between the second solenoid valve and the vibrating screen is a soft connection.

7. The integrated spray granulation and screening iron removal device according to any one of claims 1 to 4, characterized in that: The vibrating screen comprises a screening material layer, and a waste material opening is provided on the screening material layer.

8. The integrated spray granulation and screening iron removal device according to claim 7, characterized in that: The vibrating screen further comprises a material receiving layer, wherein the material receiving layer is provided with a material receiving port, and the material receiving port is connected to a collecting device.

9. The integrated spray granulation and screening iron removal device according to any one of claims 2 to 4, characterized in that: A material distribution rack is also provided in the warehouse body, and the material distribution rack can be detachably fixed to a side of the warehouse body close to the warehouse cover.

10. The integrated spray granulation and screening iron removal device according to claim 9, characterized in that: The material distribution rack is a rod-shaped bracket, including a radial bracket and a circumferential bracket, and the radial bracket and the circumferential bracket are connected as a whole.

Images