Centrifugal spray drying equipment and drying method for ceramic spray granulation

Abstract

The invention relates to the technical field of spray drying equipment, and discloses centrifugal spray drying equipment and a ceramic spray granulation drying method.The centrifugal spray drying equipment comprises a device body, an electric cabinet, an air heater and a spray drying bin, the spray drying bin is installed in the device body, and the electric cabinet and the air heater are fixedly installed at the top of the device body; a heating mechanism and an upwind mechanism are installed in the spray drying bin, and a discharging pipe is fixedly connected to the bottom of the spray drying bin. In the slurry particle heating and drying process, the interior of the spray drying bin can be heated at different temperatures in a sectional mode through the multiple air opening connecting rings, and in the slurry particle descending process, the ascending mechanism can adjust the descending speed and position of slurry particles; by means of sectional type heating, the heating time and heating uniformity of slurry particles are guaranteed, the problem that ceramic particles are broken due to the fact that the heating temperature is too high and heating is not uniform can be effectively solved, and therefore the production quality of the ceramic particles is remarkably improved.

Description

Technical Field

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

[0002] The spray drying process is a widely used process in industrial production. It is generally used to produce granular or powdered solids from various solutions. The spray drying process has the advantages of simple production process and fast material drying speed.

[0003] Chinese patent CN107537170B discloses a gradient hot air anti-sticking spray drying equipment, which is provided with a gradient hot air disk in the spray drying chamber and outside the feeding pipe, and the lower connecting part of the gradient hot air disk is in a bell-mouth shape, and ventilation holes are provided from the center to the edge, so that a hot air buffer zone can be formed on the inner wall of the spray drying chamber, and the spray sprayed from the nozzle is surrounded by the hot air buffer zone, thereby reducing the wall sticking phenomenon during the drying process.

[0004] In the above patents and prior art, the slurry is sprayed through a nozzle and then dried at high temperature. If the temperature is too high and the drying speed is too fast when the ceramic slurry particles are drying, the surface of the slurry particles will quickly dry and form a closed hard shell. When the temperature inside the slurry particles continues to rise, the air evaporates and expands, which may cause the internal pressure of the slurry particles to be too high, resulting in the entire slurry particles breaking or forming voids, thereby affecting the overall production quality of the ceramic particles. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a centrifugal spray drying device and a ceramic spray granulation drying method.

[0006] A centrifugal spray drying device and a drying method for ceramic spray granulation, comprising a device body, an electric control box, a hot air blower and a spray drying bin, wherein the spray drying bin is installed inside the device body, the electric control box and the hot air blower are fixedly installed on the top of the device body, a heating mechanism and an upwind mechanism are respectively 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 cyclone separator, a connecting pipe is fixedly connected to the top of the connecting pipe, 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 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.

[0007] Preferably, the spray drying bin comprises a drying bin body, a feed port is fixedly mounted on the top of the drying bin body, a slurry nozzle is fixedly mounted 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 provided on the outside of the drying bin body, and an air inlet is provided on the outside of the material collection bin; 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.

[0008] Preferably, a plurality of the air outlet connection rings are fixedly mounted on the inner wall of the drying bin body, and the interiors of the plurality of air outlet connection rings are all connected to the hot air blower; The hot air blower heats the interior of the drying bin through a plurality of tuyere connecting rings. The temperature and wind force output by the hot air blower to each tuyere connecting ring are different. The output temperature and wind force of the tuyere connecting rings can maintain different heating conditions of the slurry at different heights inside the drying bin.

[0009] Preferably, 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.

[0010] Preferably, a constant pressure nozzle is fixedly installed on the inner side of the tuyere connection ring, and the constant pressure nozzle is connected with the interior of the tuyere connection ring. The hot air blower injects high temperature and high pressure gas into the interior of the tuyere connection ring and then enters the interior of 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.

[0011] 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; 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.

[0012] 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; 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.

[0013] 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; 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.

[0014] 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; 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.

[0015] 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: 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.

[0016] 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.

[0017] 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

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a centrifugal spray drying device of the present invention Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of a centrifugal spray drying device of the present invention Figure 2 ; Figure 3 It is a cross-sectional structural schematic diagram of a centrifugal spray drying device of the present invention; Figure 4 A schematic diagram of the internal structure of a spray drying chamber of a centrifugal spray drying device of the present invention; Figure 5 A schematic diagram of the internal structure of a tuyere connecting ring of a centrifugal spray drying device of the present invention; Figure 6 It is a schematic diagram of the explosion structure of a constant pressure nozzle of a centrifugal spray drying device of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of an upwind mechanism of a centrifugal spray drying device of the present invention Figure 1 ; Figure 8 A schematic diagram of the three-dimensional structure of an upwind mechanism of a centrifugal spray drying device of the present invention Figure 2 .

[0019] In the figure: 1. Device body; 2. Electric control box; 3. Hot air blower; 4. Spray drying chamber; 41. Drying chamber body; 42. Feed inlet; 43. Slurry nozzle; 44. Aggregate chamber; 45. Observation window; 46. Air inlet; 5. Heating mechanism; 51. Air outlet connecting ring; 52. Constant pressure nozzle; 521. Nozzle body; 522. Nozzle block; 523. Spring fixing frame; 524. Nozzle spring; 525. Nozzle movable block; 6. Upwind mechanism; 61. Upwind body; 62. Upwind fan; 63. Upwind fixing block; 64. Air inlet channel; 7. Discharge pipe; 8. Cyclone separator; 9. Connecting pipe; 10. Blower. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a centrifugal spray drying equipment and a drying method for ceramic spray granulation.

[0022] Example 1: Please refer to Figure 1 - Figure 8 A centrifugal spray drying device comprises a device body 1, an electric control box 2, a hot air blower 3 and a spray drying bin 4, wherein the spray drying bin 4 is installed inside the device body 1, the electric control box 2 and the hot air blower 3 are fixedly installed on the top of the device body 1, a heating mechanism 5 and an upwind mechanism 6 are respectively installed inside the spray drying bin 4, a discharge pipe 7 is fixedly connected to the bottom of the spray drying bin 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, and a blower 10 is fixedly connected to the bottom of the connecting pipe 9; The output end of the blower 10 is connected to the interior of the spray drying chamber 4 through the connecting pipe 9, the cyclone separator 8 and the discharge pipe 7; The heating mechanism 5 includes a plurality of air outlet connection rings 51, and the plurality of air outlet connection rings 51 are installed inside the spray drying chamber 4, and the outside of the air outlet connection rings 51 is connected to the hot air blower 3; The output end of the hot air blower 3 passes through the spray drying chamber 4 and is connected to the interior of the air outlet connection ring 51; The top of the spray drying bin 4 can be connected to the slurry storage mechanism. After the slurry is sprayed into fine slurry particles through the spray drying bin 4, it is heated in sections through multiple air vent connecting rings 51, and then the descending speed of the slurry particles is adjusted by the upwind mechanism 6. The slurry particles are formed into 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 discharge pipe 7, and then the ceramic particles are collected by the cyclone separator 8.

[0023] During operation, the external slurry storage mechanism is first connected 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, high-temperature and high-pressure gas is injected into the heating mechanism 5 through the hot air blower 3. Since the heating mechanism 5 is divided into a plurality of air outlet connection rings 51, the interior of the spray drying chamber 4 can be heated in sections, and the temperature of each section is different. In addition, there is an upward airflow discharged by the upwind mechanism 6 at the center of the spray drying chamber 4. The descending speed of the slurry particles is adjusted by the upward airflow. During the descent process of the slurry particles, they are heated at different temperatures in multiple sections. After the processing is completed, the slurry particles form a ceramic Ceramic particles continue to descend from the outside of the upwind mechanism 6, enter the inside of the discharge pipe 7, and then enter the cyclone separator for collection under the drive of the blower 10. During the slurry heating and drying process, the inside of the spray drying chamber 4 is heated at different temperatures in sections through multiple air vent connecting rings 51, and during the slurry falling process, the upwind mechanism 6 can adjust the falling speed and position of the slurry. Through segmented heating and ensuring the heating time and uniform heating of the slurry, the problem of ceramic particles being broken due to excessive heating temperature and uneven heating can be effectively prevented, thereby significantly improving the production quality of ceramic particles.

[0024] Embodiment 2: The difference from the above embodiment is that, please refer to Figure 1 - Figure 3 The spray drying chamber 4 comprises a drying chamber body 41, a feed port 42 is fixedly mounted on the top of the drying chamber body 41, a slurry nozzle 43 is fixedly mounted on the bottom of the feed port 42, a material collection chamber 44 is fixedly connected to the bottom of the drying chamber body 41, an observation window 45 is provided on the outside of the drying chamber body 41, and an air inlet 46 is provided on the outside of the material collection chamber 44; The top of the feed port 42 can be connected to an external slurry storage device, and the slurry storage device can first connect the slurry with the slurry nozzle 43 through the feed port 42, and then spray the slurry into fine slurry particles through the slurry nozzle 43.

[0025] A plurality of air outlet connection rings 51 are fixedly mounted on the inner wall of the drying bin body 41, and the interiors of the plurality of air outlet connection rings 51 are all connected to the hot air blower 3; The hot air blower 3 heats the interior of the drying bin body 41 through a plurality of tuyere connecting rings 51. The temperature and wind force output by the hot air blower 3 to each tuyere connecting ring 51 are different. The output temperature and wind force of the tuyere connecting ring 51 can maintain different heating conditions of the slurry at different heights inside the drying bin body 41.

[0026] 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; After being formed inside the drying bin 41 , the ceramic particles fall into the gathering bin 44 , and then are sucked into the cyclone separator 8 from the discharge pipe 7 by the blower 10 , and then separated and collected by the cyclone separator 8 .

[0027] During operation, the feed port 42 is first connected to the external slurry storage mechanism. The slurry storage mechanism can first connect the slurry with the slurry nozzle 43 through the feed port 42, and then spray the slurry into fine slurry particles through the slurry nozzle 43. The fine slurry particles enter 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 port connecting ring 51 are different, the wind force toward 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 heated more evenly inside and outside at different stages of drying. During the drying process, the production situation inside the drying bin body 41 can be observed through the observation window 45, thereby preventing the ceramic particles from being broken due to excessive temperature or uneven income. After the ceramic particles descend, they enter the discharge pipe 7 through the gathering bin 44 and can be sucked into the cyclone separator 8 by the blower 10 for collection.

[0028] Embodiment 3: The difference from the above embodiment is that, please refer to Figure 3 - Figure 6 A constant pressure nozzle 52 is fixedly installed on the inner side of the tuyere connection ring 51, and the constant pressure nozzle 52 is connected to the inside of the tuyere connection ring 51. The hot air blower 3 injects high temperature and high pressure gas into the tuyere connection ring 51 and then enters the drying chamber 41 through the constant pressure nozzle 52; A plurality of constant-pressure nozzles 52 are fixedly installed inside the tuyere connection ring 51 , and the plurality of constant-pressure nozzles 52 are equidistantly distributed in a ring shape inside the tuyere connection ring 51 .

[0029] The constant pressure nozzle 52 includes a nozzle body 521, which is fixedly mounted on the inner side of the air outlet connection ring 51, a nozzle stopper 522 is fixedly mounted inside the nozzle body 521, a spring fixing frame 523 is fixedly mounted inside the nozzle body 521, a nozzle spring 524 is fixedly connected to one side of the spring fixing frame 523, and a nozzle movable block 525 is fixedly connected to one side of the nozzle spring 524; 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 .

[0030] 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; 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.

[0031] 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.

[0032] 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. One side of the upwind fixing block 63 is fixedly connected to the inner wall of the material collecting bin 44 , and the other side of the upwind fixing block 63 is fixedly connected to the upwind main body 61 .

[0033] A plurality of upwind fixing blocks 63 are fixedly installed on the outside of the upwind main body 61, and an air inlet channel 64 is opened inside each of the plurality of upwind fixing blocks 63. The position of the air inlet channel 64 coincides with the position of the air inlet 46 on the aggregate bin 44; The interior of the upwind main body 61 is connected to the outside through the air inlet channel 64 and the air inlet 46. The outside of the upwind fixing block 63 is an arc-shaped structure. When the upwind fan 62 is working, it absorbs air from the outside through the air inlet channel 64 and the air inlet 46 to provide an upward airflow. The ceramic particles can descend from the gap between the two upwind fixing blocks 63 and enter the inside of the discharge pipe 7.

[0034] During operation, the slurry is sprayed into the drying bin body 41 to form slurry particles. During the descent of the slurry particles in the drying bin body 41, the heating mechanism 5 is used to dry and heat the slurry particles. During the drying process, the upwind fan 62 can rotate to form an upward rising airflow in the center of the drying bin body 41. When the upwind fan 62 forms the rising airflow, the falling speed of the slurry particles can be reduced, and the slurry particles can be driven to move to the edge of the drying bin body 41. 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. The closer to the upwind fan 62, the greater the wind force of the rising airflow, which can make the slurry particles enter the aggregation bin 44 from the outside of the upwind main body 61 when descending. When the upwind fan 62 is working, air is drawn into the upper main body through the air inlet 46 and the air inlet channel 64 to form an rising airflow, which can prevent the upwind fan 62 from sucking ceramic particles into the upwind mechanism 6 during rotation, and reduce the falling speed of the slurry particles and drive the slurry particles to rotate through the upwind mechanism 6, so that the slurry particles are heated more evenly.

[0035] Example 5: A centrifugal spray drying device and a drying method for ceramic spray granulation, using a centrifugal spray drying device as described in Example 1, comprising the following steps: At the beginning of the process, the external slurry storage mechanism is first connected to the top of the spray drying chamber 4, and the slurry can be sprayed into fine slurry particles after entering the spray drying chamber 4; Then, high-temperature and high-pressure gas is injected into the heating mechanism 5 through the hot air blower 3, and the slurry is evenly heated in layers through the heating mechanism 5; During the heating process, the wind mechanism 6 can reduce the descending speed of the slurry particles and drive the slurry particles to rotate, so that the slurry particles are heated more evenly; After the slurry particles are processed into ceramic particles, the ceramic particles are sucked into the cyclone separator 8 by the blower 10 for collection.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 the tuyere connection rings 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 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; 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: 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 hot air blower heats the interior of the drying bin through a plurality of tuyere connecting rings. The temperature and wind force output by the hot air blower to each tuyere connecting ring are different. The output temperature and wind force of the tuyere connecting rings can maintain different heating conditions of the slurry at different heights inside the drying bin.

4. A centrifugal spray drying device according to claim 3, 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.

5. 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.

6. A centrifugal spray drying device according to claim 5, 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.

7. A centrifugal spray drying device according to claim 6, 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.

8. 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.

9. A centrifugal spray drying device according to claim 8, 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.

10. 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 9.

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