A centrifugal spray drying device and a drying method for ceramic spray granulation

Abstract

The present invention relates to the technical field of spray drying equipment, and discloses a centrifugal spray drying equipment and a drying method for ceramic spray granulation, including a device main body, an electric control box, a hot air blower and a spray drying chamber. The spray drying chamber is installed inside the device main body, the electric control box and the hot air blower are fixedly installed at the top of the device main body, a heating mechanism and an upper air mechanism are respectively installed inside the spray drying chamber, and a discharge pipe is fixedly connected to the bottom of the spray drying chamber. The present invention can perform segmented heating at different temperatures inside the spray drying chamber through a plurality of air outlet connection rings during the heating and drying process of the slurry particles, and the upper air mechanism can adjust the falling speed and position of the slurry particles during the falling process of the slurry particles. By segmented heating and ensuring the heating time and uniformity of the slurry particles, the problem of ceramic particle fragmentation caused by too high heating temperature and uneven heating can be effectively prevented, thereby significantly improving the production quality of ceramic particles.

Description

Technical Field

[0001] The present invention relates to the technical field of spray drying equipment, and particularly to a centrifugal spray drying equipment and a drying method for ceramic spray granulation. Background Art

[0002] The spray drying process is a process widely used in industrial production, generally used to produce granular or powdery solids from various solutions. The spray drying process has the advantages of simple production process, fast drying speed of materials, etc.

[0003] Chinese Patent CN107537170B discloses a gradient hot air anti-sticking wall spray drying equipment. By arranging gradient hot air disks inside the spray drying chamber and outside the feeding pipe, and the lower connecting part of the gradient hot air disk is in a flared shape, and ventilation holes are arranged from the center to the edge, a hot air buffer zone can be formed on the inner wall of the spray drying chamber, and the spray ejected by the nozzle is surrounded by the hot air buffer zone, thereby reducing the phenomenon of sticking to the wall during the drying process.

[0004] In the above patent and the prior art, the slurry is sprayed through a nozzle and then dried at a high temperature. When the ceramic slurry particles are dried, if the temperature is too high and the drying speed is too fast, the surface of the slurry particles dries and forms a closed hard shell quickly. When the air in the inner part of the slurry particles continues to heat up and evaporates and expands, it may cause the internal pressure of the slurry particles to be too large, resulting in the whole slurry particle being broken or having cavities, thus affecting the overall production quality of the ceramic particles. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a centrifugal spray drying equipment and a drying method for ceramic spray granulation.

[0006] A centrifugal spray drying equipment and a drying method for ceramic spray granulation, including a device main body, an electric control box, a hot air blower and a spray drying chamber. The spray drying chamber is installed inside the device main body. The electric control box and the hot air blower are fixedly installed at the top of the device main body. A heating mechanism and an upper air mechanism are respectively installed inside the spray drying chamber. The bottom of the spray drying chamber is fixedly connected with a discharge pipe. The top of the discharge pipe is fixedly connected with a cyclone separator. The top of the cyclone separator is fixedly connected with a connecting pipe. The bottom of the connecting pipe is fixedly connected with a blower;

[0007] The output end of the blower is communicated with the inside of the spray drying chamber through the connecting pipe, the cyclone separator and the discharge pipe;

[0008] The heating mechanism includes a plurality of air outlet connecting rings. A plurality of the air outlet connecting rings are all installed inside the spray drying chamber, and the outside of the air outlet connecting ring is connected with the hot air blower;

[0009] The output end of the hot air blower passes through the spray drying chamber and is connected to the inside of the air outlet connection ring;

[0010] The top of the spray drying chamber can be connected to the slurry storage mechanism. After the slurry is sprayed into fine slurry particles through the spray drying chamber, it is heated in sections through multiple air outlet connection rings, and then the descending speed of the slurry particles is adjusted by the upper air mechanism. After the slurry particles are heated at high temperature by the heating mechanism to form ceramic particles, the ceramic particles are then driven into the inside of the discharge pipe by a blower, and then the ceramic particles are collected by a cyclone separator.

[0011] Preferably, the spray drying chamber includes a drying chamber body. The top of the drying chamber body is fixedly installed with a feed inlet, the bottom of the feed inlet is fixedly installed with a slurry spray head, the bottom of the drying chamber body is fixedly connected with a material collecting bin, an observation window is opened outside the drying chamber body, and an air inlet is opened outside the material collecting bin;

[0012] The top of the feed inlet can be connected to an external slurry storage device. The slurry storage mechanism can connect the slurry to the slurry spray head through the feed inlet first, and then spray the slurry into fine slurry particles through the slurry spray head.

[0013] Preferably, a plurality of the air outlet connection rings are fixedly installed on the inner wall of the drying chamber body, and the inside of each of the plurality of air outlet connection rings is connected to the hot air blower;

[0014] The hot air blower heats the inside of the drying chamber body through a plurality of air outlet connection rings. The output temperature and wind force of the hot air blower for each air outlet connection ring are different, and the output temperature and wind force of the air outlet connection ring can maintain different heating conditions of the slurry particles at different heights inside the drying chamber body.

[0015] Preferably, the top of the material collecting bin is connected to the drying chamber body, the bottom of the material collecting bin is connected to the discharge pipe, and the blower can generate suction at the bottom of the material collecting bin through a connecting pipe, a cyclone separator and the discharge pipe;

[0016] After the ceramic particles are formed inside the drying chamber body, they fall into the inside of the material collecting bin, and then the ceramic particles are sucked from the discharge pipe into the cyclone separator by the blower, and then the ceramic particles are separated and collected by the cyclone separator.

[0017] Preferably, constant pressure spray heads are fixedly installed on the inner sides of the air outlet connection rings. The constant pressure spray heads are connected to the inside of the air outlet connection rings, and the hot air blower injects high-temperature and high-pressure gas into the inside of the air outlet connection rings and then enters the inside of the drying chamber body through the constant pressure spray heads;

[0018] A plurality of constant pressure spray heads are fixedly installed inside the air outlet connection ring, and the plurality of constant pressure spray heads are annularly and equidistantly distributed on the inner side of the air outlet connection ring.

[0019] Preferably, the constant pressure nozzle comprises a nozzle body, the nozzle body is fixedly mounted on the inner side of the air outlet connection ring, a nozzle stopper is fixedly mounted inside the nozzle body, a spring fixing frame is fixedly mounted inside the nozzle body, a nozzle spring is fixedly connected to one side of the spring fixing frame, and a nozzle movable block is fixedly connected to one side of the nozzle spring;

[0020] One end of the nozzle spring is fixedly mounted on the spring fixing frame, and the other end of the nozzle spring passes through the nozzle stopper and is fixedly connected to the inside of the nozzle movable block.

[0021] Preferably, the inner side of the nozzle movable block is in contact with the outer side of the nozzle body, and the position of the opening on the side of the nozzle movable block coincides with the position of a part of the entity of the nozzle stopper;

[0022] After the hot air blower injects high-pressure gas into the air outlet connecting circle, the opening position of the nozzle movable block coincides with the physical position of the nozzle stopper, and the gas inside the air outlet connecting circle cannot be discharged. The pressure inside the air outlet connecting circle gradually increases. After the internal pressure of the air outlet connecting circle reaches a certain level, it pushes the nozzle movable block to move toward the center of the air outlet connecting circle. At this time, the nozzle spring is extended, the positions of the nozzle movable block and the nozzle stopper are staggered, and the high-pressure gas inside the air outlet connecting circle is injected into the drying bin body from the nozzle main body and the nozzle movable block.

[0023] Preferably, the upwind mechanism comprises an upwind body and an upwind fan, wherein the upwind fan is fixedly installed inside the upwind body, an upwind fixing block is fixedly installed outside the upwind body, and an air inlet channel is opened inside the upwind fixing block;

[0024] One side of the upwind fixing block is fixedly connected to the inner wall of the aggregate bin, and the other side of the upwind fixing block is fixedly connected to the upwind main body.

[0025] Preferably, a plurality of upwind fixing blocks are fixedly installed on the outside of the upwind main body, and an air inlet channel is opened inside each of the plurality of upwind fixing blocks, and the position of the air inlet channel coincides with the position of the air inlet on the aggregate bin;

[0026] The interior of the upwind main body is connected to the outside through an air inlet channel and an air inlet. The outside of the upwind fixed block is an arc-shaped structure. When the upwind fan is working, it absorbs air from the outside through the air inlet channel and the air inlet to provide an upward airflow. The ceramic particles can descend from the gap between the two upwind fixed blocks into the inside of the discharge pipe.

[0027] Compared with the prior art, the present invention provides a centrifugal spray drying device and a drying method for ceramic spray granulation, which have the following beneficial effects:

[0028] 1. This centrifugal spray drying equipment uses multiple air vent connection rings to heat the inside of the spray drying chamber at different temperatures in sections during the slurry particle heating and drying process. In addition, the upwind mechanism can adjust the descent speed and position of the slurry particles during the descent process. The segmented heating ensures the heating time and uniform heating of the slurry particles, which can effectively prevent the problem of ceramic particle breakage caused by excessive heating temperature and uneven heating, thereby significantly improving the production quality of ceramic particles.

[0029] 2. In this centrifugal spray drying equipment, when the internal pressure of the tuyere connecting ring is insufficient, the nozzle movable block is fitted with the nozzle body and the nozzle block under the drive of the nozzle spring, and the opening position on the nozzle movable block coincides with the physical position on the nozzle block, so that the gas inside the tuyere connecting ring cannot be discharged, thereby causing the pressure inside the tuyere connecting ring to gradually increase. After the internal pressure of the tuyere connecting ring reaches a certain level, the gas pressure inside the tuyere connecting ring pushes the nozzle movable block to move toward the center of the tuyere connecting ring. At this time, the nozzle spring is extended, and the positions of the nozzle movable block and the nozzle block are staggered, so that the slurry particles in different directions can receive the same drying effect, thereby ensuring the overall drying quality of the ceramic particles.

[0030] 3. In this centrifugal spray drying equipment, during the drying process, the upwind fan can rotate to form an upward airflow in the center of the drying bin. When the upwind fan forms the upwind airflow, it can reduce the descending speed of the slurry particles and drive the slurry particles to move to the edge of the drying bin. During the movement of the slurry particles, due to the forces in two directions, the slurry particles can be fully turned over during the drying process, so that the slurry particles are heated more evenly. When the upper fan is working, air is drawn into the upper main body through the air inlet and the air inlet channel to form an upward airflow, which can prevent the upwind fan from sucking ceramic particles into the upwind mechanism during rotation, and reduce the descending speed of the slurry particles through the upwind mechanism and drive the slurry particles to rotate, so that the slurry particles are heated more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the three-dimensional structure of a centrifugal spray drying device of the present invention Figure 1 ;

[0032] Figure 2 A schematic diagram of the three-dimensional structure of a centrifugal spray drying device of the present invention Figure 2 ;

[0033] Figure 3 It is a cross-sectional structural schematic diagram of a centrifugal spray drying device of the present invention;

[0034] Figure 4 A schematic diagram of the internal structure of a spray drying chamber of a centrifugal spray drying device of the present invention;

[0035] Figure 5 Schematic diagram of the internal structure of the air outlet connection ring of a centrifugal spray drying device according to the present invention;

[0036] Figure 6 Exploded structure schematic diagram of a constant pressure nozzle of a centrifugal spray drying device according to the present invention;

[0037] Figure 7 Stereoscopic structure schematic of the upper air mechanism of a centrifugal spray drying device according to the present invention Figure 1 ;

[0038] Figure 8 Stereoscopic structure schematic of the upper air mechanism of a centrifugal spray drying device according to the present invention Figure 2 。

[0039] In the figure: 1, device main body; 2, electric control box; 3, hot air blower; 4, spray drying chamber; 41, drying chamber body; 42, feed inlet; 43, slurry nozzle; 44, material collecting bin; 45, observation window; 46, air inlet; 5, heating mechanism; 51, air outlet connection ring; 52, constant pressure nozzle; 521, nozzle main body; 522, nozzle stopper; 523, spring fixing frame; 524, nozzle spring; 525, nozzle movable block; 6, upper air mechanism; 61, upper air main body; 62, upper air fan; 63, upper air fixing block; 64, air inlet channel; 7, discharge pipe; 8, cyclone separator; 9, connecting pipe; 10, blower. Specific embodiments

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a centrifugal spray drying device and a drying method for ceramic spray granulation.

[0042] Example 1: Please refer to Figure 1 - Figure 8, A centrifugal spray drying device, comprising a device main body 1, an electric control box 2, a hot air blower 3 and a spray drying chamber 4. The spray drying chamber 4 is installed inside the device main body 1. The electric control box 2 and the hot air blower 3 are fixedly installed on the top of the device main body 1. An heating mechanism 5 and an upper air mechanism 6 are respectively installed inside the spray drying chamber 4. A discharge pipe 7 is fixedly connected to the bottom of the spray drying chamber 4. A cyclone separator 8 is fixedly connected to the top of the discharge pipe 7. A connecting pipe 9 is fixedly connected to the top of the cyclone separator 8. A blower 10 is fixedly connected to the bottom of the connecting pipe 9;

[0043] The output end of the blower 10 is communicated with the inside of the spray drying chamber 4 through the connecting pipe 9, the cyclone separator 8 and the discharge pipe 7;

[0044] The heating mechanism 5 includes a plurality of air outlet connection rings 51. The plurality of air outlet connection rings 51 are all installed inside the spray drying chamber 4. The outside of the air outlet connection ring 51 is connected to the hot air blower 3;

[0045] The output end of the hot air blower 3 passes through the spray drying chamber 4 and is communicated with the inside of the air outlet connection ring 51;

[0046] The top of the spray drying chamber 4 can be connected to a slurry storage mechanism. After the slurry is sprayed into fine slurry particles through the spray drying chamber 4, it is heated in sections through a plurality of air outlet connection rings 51, and then the descending speed of the slurry particles is adjusted through the upper air mechanism 6. The slurry particles form ceramic particles after being heated at high temperature by the heating mechanism 5, and then the ceramic particles are driven by the blower 10 into the inside of the discharge pipe 7, and then the ceramic particles are collected by the cyclone separator 8.

[0047] During operation, first connect the external slurry storage mechanism to the top of the spray drying chamber 4. After the slurry enters the spray drying chamber 4, it can be sprayed into fine slurry particles. Then, inject high-temperature and high-pressure gas into the heating mechanism 5 through the hot air blower 3. Since the heating mechanism 5 is divided into multiple air outlet connection rings 51, the inside of the spray drying chamber 4 can be heated in a segmented manner, and the temperatures of each segment are different. Moreover, there is an upward airflow discharged from the upper air mechanism 6 at the center of the spray drying chamber 4. The downward speed of the slurry particles is adjusted through the upward airflow. During the descent of the slurry particles, through heating at multiple segmented different temperatures, the slurry particles form ceramic particles after processing. The ceramic particles continue to descend from the outside of the upper air mechanism 6 and enter the discharge pipe 7. Then, they are driven by the blower 10 and enter the cyclone separator for collection. During the heating and drying process of the slurry particles, the inside of the spray drying chamber 4 is heated in a segmented manner at different temperatures through multiple air outlet connection rings 51. Moreover, during the descent of the slurry particles, the upper air mechanism 6 can adjust the descent speed and position of the slurry particles. Through segmented heating and ensuring the heating time and uniformity of the slurry particles, the problem of ceramic particle fragmentation caused by too high heating temperature and uneven heating can be effectively prevented, thus significantly improving the production quality of ceramic particles.

[0048] Embodiment 2: The difference from the above embodiment is as follows. Please refer to Figure 1 - Figure 3 , the spray drying chamber 4 includes a drying chamber body 41. A feed inlet 42 is fixedly installed at the top of the drying chamber body 41. A slurry spray head 43 is fixedly installed at the bottom of the feed inlet 42. A material collecting bin 44 is fixedly connected to the bottom of the drying chamber body 41. An observation window 45 is opened on the outside of the drying chamber body 41. An air inlet 46 is opened on the outside of the material collecting bin 44;

[0049] The top of the feed inlet 42 can be connected to an external slurry storage device. The slurry storage mechanism can first connect the slurry through the feed inlet 42 to the slurry spray head 43, and then spray the slurry into fine slurry particles through the slurry spray head 43.

[0050] A plurality of air outlet connection rings 51 are fixedly installed on the inner wall of the drying chamber body 41. The inside of each of the plurality of air outlet connection rings 51 is connected to the hot air blower 3;

[0051] The hot air blower 3 heats the inside of the drying chamber body 41 through a plurality of air outlet connection rings 51. The temperatures and wind forces output by the hot air blower 3 to each air outlet connection ring 51 are different. The output temperature and wind force of the air outlet connection ring 51 can maintain different heating conditions of the slurry particles at different heights inside the drying chamber body 41.

[0052] The top of the aggregate bin 44 is connected to the drying bin body 41, and the bottom of the aggregate bin 44 is connected to the discharge pipe 7. The blower 10 can generate suction at the bottom of the aggregate bin 44 through the connecting pipe 9, the cyclone separator 8, and the discharge pipe 7.

[0053] After the ceramic particles are formed inside the drying bin body 41, they fall into the inside of the aggregate bin 44, and then the ceramic particles are sucked from the discharge pipe 7 into the cyclone separator 8 by the blower 10, and then the cyclone separator 8 separates and collects the ceramic particles.

[0054] During operation, first connect the feed inlet 42 to an external slurry storage mechanism. The slurry storage mechanism can first connect the slurry to the slurry spray head 43 through the feed inlet 42, and then spray the slurry into fine slurry particles through the slurry spray head 43. The fine slurry particles enter the inside of the drying bin body 41 and are heated and dried by the heating mechanism 5. Since the wind force and temperature output by the hot air blower 3 to each air outlet connection ring 51 are different, the wind force towards the center of the drying bin body 41 can prevent the slurry particles from sticking to the inner wall of the drying bin body 41 during the drying process, and the different temperatures at different heights can make the slurry particles heat more evenly inside and outside during different drying stages. During the drying process, the production situation inside the drying bin body 41 can be observed through the observation window 45, so as to prevent the ceramic particles from cracking due to excessive temperature or uneven heating. After the ceramic particles drop and enter the discharge pipe 7 through the aggregate bin 44, the blower 10 can suck the ceramic particles into the cyclone separator 8 to collect the ceramic particles.

[0055] Embodiment 3: The difference from the above embodiment is as follows. Please refer to Figure 3 - Figure 6 , a constant-pressure spray head 52 is fixedly installed on the inner side of each air outlet connection ring 51. The constant-pressure spray head 52 is communicated with the inside of the air outlet connection ring 51. After the hot air blower 3 injects high-temperature and high-pressure gas into the air outlet connection ring 51, it enters the drying bin body 41 through the constant-pressure spray head 52.

[0056] A plurality of constant-pressure spray heads 52 are fixedly installed inside the air outlet connection ring 51, and the plurality of constant-pressure spray heads 52 are annularly and equidistantly distributed on the inner side of the air outlet connection ring 51.

[0057] The constant-pressure spray head 52 includes a spray head main body 521, the spray head main body 521 is fixedly installed on the inner side of the air outlet connection ring 51, a spray head stopper 522 is fixedly installed inside the spray head main body 521, a spring fixing frame 523 is fixedly installed inside the spray head main body 521, one side of the spring fixing frame 523 is fixedly connected to a spray head spring 524, and one side of the spray head spring 524 is fixedly connected to a spray head movable block 525.

[0058] One end of the nozzle spring 524 is fixedly mounted on the spring fixing frame 523 , and the other end of the nozzle spring 524 passes through the nozzle stopper 522 and is fixedly connected to the inside of the nozzle movable block 525 .

[0059] The inner side of the nozzle movable block 525 is fitted with the outer side of the nozzle body 521, and the position of the opening on the side of the nozzle movable block 525 coincides with the position of the solid part of the nozzle stopper 522;

[0060] After the hot air blower 3 injects high-pressure gas into the tuyere connecting ring 51, the opening position of the nozzle movable block 525 coincides with the physical position of the nozzle block 522, and the gas inside the tuyere connecting ring 51 cannot be discharged. The pressure inside the tuyere connecting ring 51 gradually increases. After the internal pressure of the tuyere connecting ring 51 reaches a certain level, the nozzle movable block 525 is pushed to move toward the center of the tuyere connecting ring 51. At this time, the nozzle spring 524 is extended, and the positions of the nozzle movable block 525 and the nozzle block 522 are staggered. The high-pressure gas inside the tuyere connecting ring 51 is injected into the drying bin body 41 from the nozzle body 521 and the nozzle movable block 525.

[0061] During operation, the inside of the drying chamber 41 needs to be heated by the hot air blower 3. First, high-temperature and high-pressure gas is injected into the tuyere connecting ring 51 through the hot air blower 3. When the pressure inside the tuyere connecting ring 51 is insufficient, the nozzle movable block 525 is fitted with the nozzle body 521 and the nozzle stopper 522 under the drive of the nozzle spring 524, and the opening position on the nozzle movable block 525 coincides with the physical position on the nozzle stopper 522, so that the gas inside the tuyere connecting ring 51 cannot be discharged, thereby causing the pressure inside the tuyere connecting ring 51 to gradually increase. When the pressure inside the tuyere connecting ring 51 reaches a certain level, the gas pressure inside the tuyere connecting ring 51 is increased. The force pushes the nozzle movable block 525 to move toward the center of the tuyere connecting ring 51. At this time, the nozzle spring 524 is extended, the positions of the nozzle movable block 525 and the nozzle stop block 522 are staggered, and the high-pressure gas inside the tuyere connecting ring 51 passes through the nozzle body 521 and the nozzle movable block 525 and is injected into the drying bin body 41, so that the constant-pressure nozzles 52 in all directions and at different distances from the connection between the tuyere connecting ring 51 and the hot air blower 3 can simultaneously inject high-temperature gas into the drying bin body 41 with the same wind force, so that the slurry particles in different directions can receive the same drying effect, thereby ensuring the overall drying quality of the ceramic particles.

[0062] Embodiment 4: The difference from the above embodiment is that, please refer to Figure 7 and Figure 8 The upwind mechanism 6 includes an upwind body 61 and an upwind fan 62. The upwind fan 62 is fixedly installed inside the upwind body 61. An upwind fixing block 63 is fixedly installed outside the upwind body 61. An air inlet channel 64 is opened inside the upwind fixing block 63.

[0063] One side of the upper wind fixing block 63 is fixedly connected to the inner wall of the material collecting bin 44, and the other side of the upper wind fixing block 63 is fixedly connected to the upper wind main body 61.

[0064] A plurality of upper wind fixing blocks 63 are fixedly installed on the outside of the upper wind main body 61. Air inlet channels 64 are formed inside the plurality of upper wind fixing blocks 63. The positions of the air inlet channels 64 coincide with the positions of the air inlets 46 on the material collecting bin 44.

[0065] The inside of the upper wind main body 61 communicates with the outside through the air inlet channels 64 and the air inlets 46. The outside of the upper wind fixing block 63 is of an arc-shaped structure. When the upper wind fan 62 operates, air is absorbed from the outside through the air inlet channels 64 and the air inlets 46 to provide an upward air flow. Ceramic particles can descend from the gap between the two upper wind fixing blocks 63 into the inside of the discharge pipe 7.

[0066] During operation, the slurry is sprayed into the drying chamber body 41 to form slurry particles. During the descent of the slurry particles inside the drying chamber body 41, the heating mechanism 5 is used to dry and heat the slurry particles. During the drying process, the upper wind fan 62 can rotate to form an upward rising air flow in the center of the drying chamber body 41. When the upper wind fan 62 forms the rising air flow, it can reduce the descending speed of the slurry particles and drive the slurry particles to move towards the edge of the drying chamber body 41. During the movement of the slurry particles, due to the action of two-directional forces, the slurry particles can be fully flipped during the drying process, so that the slurry particles are heated more evenly. The closer to the upper wind fan 62, the greater the wind force of the rising air flow, which can enable the slurry particles to enter the inside of the material collecting bin 44 from the outside of the upper wind main body 61 when descending. When the upper wind fan 62 operates, air is drawn into the upper main body through the air inlets 46 and the air inlet channels 64 to form a rising air flow, which can prevent the upper wind fan 62 from sucking the ceramic particles into the upper wind mechanism 6 during rotation. The upper wind mechanism 6 is used to reduce the descending speed of the slurry particles and drive the slurry particles to rotate, so that the slurry particles are heated more evenly.

[0067] Embodiment Five: A centrifugal spray drying device and a drying method for ceramic spray granulation, using a centrifugal spray drying device as described in Embodiment One, including the following steps:

[0068] At the beginning of processing, first connect the external slurry storage mechanism to the top of the spray drying chamber 4. After the slurry enters the spray drying chamber 4, it can be sprayed into fine slurry particles.

[0069] Then, high-temperature and high-pressure gas is injected into the heating mechanism 5 through the hot air blower 3, and the slurry particles are heated layer by layer and evenly by the heating mechanism 5.

[0070] During the heating process, the upper wind mechanism 6 can reduce the descending speed of the slurry particles and drive the slurry particles to rotate, making the slurry particles heated more evenly.

[0071] After the slurry particles are processed into ceramic particles, the ceramic particles are sucked into the cyclone separator 8 by a blower 10 for collection.

[0072] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal spray drying device, comprising a device body, an electric control box, a hot air blower and a spray drying chamber, wherein the spray drying chamber is installed inside the device body, and the electric control box and the hot air blower are fixedly installed on the top of the device body, characterized in that: A heating mechanism and an upwind mechanism are installed inside the spray drying bin, a discharge pipe is fixedly connected to the bottom of the spray drying bin, a cyclone separator is fixedly connected to the top of the discharge pipe, a connecting pipe is fixedly connected to the top of the cyclone separator, and a blower is fixedly connected to the bottom of the connecting pipe; The output end of the blower is connected to the interior of the spray drying bin through a connecting pipe, a cyclone separator and a discharge pipe; The heating mechanism comprises a plurality of tuyere connection rings, each of which is installed inside the spray drying chamber, and the outside of each of which is connected to a hot air blower; The output end of the hot air blower passes through the spray drying chamber and is connected to the interior of the air outlet connection ring; The hot air blower heats the interior of the drying bin through a plurality of tuyere connection rings, and the temperature and wind force output by the hot air blower to each tuyere connection ring are different, and the output temperature and wind force of the tuyere connection ring can maintain different heating conditions of the slurry at different heights inside the drying bin; The top of the spray drying bin can be connected to a slurry storage mechanism. After the slurry is sprayed into fine slurry particles by the spray drying bin, it is heated in sections by a plurality of air outlet connecting rings. The descending speed of the slurry particles is then adjusted by an upwind mechanism. The slurry particles are heated at high temperatures by the heating mechanism to form ceramic particles. The ceramic particles are then driven into the discharge pipe by a blower and collected by a cyclone separator.

2. A centrifugal spray drying device according to claim 1, characterized in that: The spray drying bin comprises a drying bin body, a feed port is fixedly installed on the top of the drying bin body, a slurry nozzle is fixedly installed on the bottom of the feed port, a material collection bin is fixedly connected to the bottom of the drying bin body, an observation window is opened on the outside of the drying bin body, and an air inlet is opened on the outside of the material collection bin; A plurality of tuyere connection rings are fixedly mounted on the inner wall of the drying bin, and the interiors of the plurality of tuyere connection rings are all connected to the hot air blower; The top of the feed port can be connected to an external slurry storage device, and the slurry storage device can first connect the slurry with the slurry nozzle through the feed port, and then spray the slurry into fine slurry particles through the slurry nozzle.

3. A centrifugal spray drying device according to claim 2, characterized in that: The top of the aggregate bin is connected to the drying bin body, the bottom of the aggregate bin is connected to the discharge pipe, and the blower can generate suction at the bottom of the aggregate bin through the connecting pipe, the cyclone separator and the discharge pipe; After being formed inside the drying bin, the ceramic particles fall into the gathering bin, and then the blower sucks the ceramic particles from the discharge pipe into the cyclone separator, and then the ceramic particles are separated and collected by the cyclone separator.

4. A centrifugal spray drying device according to claim 3, characterized in that: A constant pressure nozzle is fixedly installed on the inner side of the tuyere connection ring, and the constant pressure nozzle is connected to the inside of the tuyere connection ring. The hot air blower injects high temperature and high pressure gas into the tuyere connection ring and then enters the drying chamber through the constant pressure nozzle. A plurality of constant-pressure nozzles are fixedly installed inside the tuyere connection ring, and the plurality of constant-pressure nozzles are distributed in a ring shape and at equal intervals inside the tuyere connection ring.

5. A centrifugal spray drying device according to claim 4, characterized in that: The constant pressure nozzle comprises a nozzle body, the nozzle body is fixedly mounted on the inner side of the air outlet connection ring, a nozzle stopper is fixedly mounted inside the nozzle body, a spring fixing frame is fixedly mounted inside the nozzle body, a nozzle spring is fixedly connected to one side of the spring fixing frame, and a nozzle movable block is fixedly connected to one side of the nozzle spring; One end of the nozzle spring is fixedly mounted on the spring fixing frame, and the other end of the nozzle spring passes through the nozzle stopper and is fixedly connected to the inside of the nozzle movable block.

6. A centrifugal spray drying device according to claim 5, characterized in that: The inner side of the nozzle movable block is fitted with the outer side of the nozzle body, and the position of the opening on the side of the nozzle movable block coincides with the position of a part of the entity of the nozzle stopper; After the hot air blower injects high-pressure gas into the air outlet connecting circle, the opening position of the nozzle movable block coincides with the physical position of the nozzle stopper, and the gas inside the air outlet connecting circle cannot be discharged. The pressure inside the air outlet connecting circle gradually increases. After the internal pressure of the air outlet connecting circle reaches a certain level, it pushes the nozzle movable block to move toward the center of the air outlet connecting circle. At this time, the nozzle spring is extended, the positions of the nozzle movable block and the nozzle stopper are staggered, and the high-pressure gas inside the air outlet connecting circle is injected into the drying bin body from the nozzle main body and the nozzle movable block.

7. A centrifugal spray drying device according to claim 1, characterized in that: The upwind mechanism comprises an upwind body and an upwind fan, wherein the upwind fan is fixedly installed inside the upwind body, an upwind fixing block is fixedly installed outside the upwind body, and an air inlet channel is opened inside the upwind fixing block; One side of the upwind fixing block is fixedly connected to the inner wall of the aggregate bin, and the other side of the upwind fixing block is fixedly connected to the upwind main body.

8. A centrifugal spray drying device according to claim 7, characterized in that: A plurality of upwind fixing blocks are fixedly installed on the outside of the upwind main body, and an air inlet channel is opened inside each of the plurality of upwind fixing blocks, and the position of the air inlet channel coincides with the position of the air inlet on the aggregate bin; The interior of the upwind main body is connected to the outside through an air inlet channel and an air inlet. The outside of the upwind fixed block is an arc-shaped structure. When the upwind fan is working, it absorbs air from the outside through the air inlet channel and the air inlet to provide an upward airflow. The ceramic particles can descend from the gap between the two upwind fixed blocks into the inside of the discharge pipe.

9. A centrifugal spray drying device and a drying method for ceramic spray granulation, using the centrifugal spray drying device as claimed in any one of claims 1 to 8.

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