Small multifunctional integrated drying device

Abstract

The invention discloses a small multifunctional integrated drying device, and relates to the technical field of industrial drying experiment equipment. The small multifunctional integrated drying device comprises a bottom plate, a vertical supporting plate is fixedly connected to the middle of the upper surface of the bottom plate, a fluidized bed drying chamber, a spray drying chamber, a main controller, a shared centrifugal fan and a shared electric heater are fixedly installed on the front face of the vertical supporting plate, and an air filter and an induced draft fan are fixedly installed on the upper surface of the bottom plate; a cyclone dust collector is fixedly installed on the back face of the vertical supporting plate, a three-way pipe is fixedly connected to the top of the shared electric heater, a fluidized bed feeder is fixedly installed on one side of the top of the fluidized bed drying chamber, and a supporting ring, an annular base, a motor, a fixing plate and an air pressure sensor are fixedly installed on the lower portion of the inner wall of the fluidized bed drying chamber. The system can integrate the fluidized bed function and the spray drying function, and energy-saving and efficient operation is achieved through the shared air path, the heat energy recovery system and the self-cleaning distribution plate.

Description

Technical Field

[0001] This invention relates to the field of industrial drying experimental equipment technology, specifically a small, multifunctional integrated drying device. Background Technology

[0002] Drying unit operations are an indispensable process in many industries such as chemical, food, pharmaceutical, ceramics, and environmental protection. Among them, fluidized bed drying and spray drying are two widely used technologies. Fluidized bed drying uses airflow to suspend solid particulate materials in a fluidized state, thereby achieving efficient heat and mass transfer between the gas and solid phases. It is particularly suitable for the final drying of granular, crystalline, or powdery materials. Spray drying atomizes solutions, suspensions, or slurries into fine droplets and rapidly evaporates moisture in hot air to obtain powdery, granular, or hollow spherical products. It is especially suitable for processing heat-sensitive materials and achieving instantaneous drying and granulation of liquid materials. To meet the needs of teaching demonstrations and experimental courses, and to enable students to intuitively understand the principles, characteristics, and applicable scenarios of different drying processes, it is of great significance to conduct systematic, intuitive, and repeatable comparative teaching of drying at the laboratory level.

[0003] Currently, laboratories generally use single-function micro spray drying test benches or micro fluidized bed drying test benches. These two types of equipment are independent of each other and have fixed functions, which makes it impossible to intuitively demonstrate and compare the working process and effects of the two drying methods on the same equipment during teaching. The equipment functions are rigid and cannot meet the needs of comprehensive and comparative experimental teaching. In addition, during long-term operation, the core component of the existing fluidized bed experimental device, the gas distribution plate, is prone to micropore blockage due to material adhesion, moisture condensation, or fine powder bridging, which seriously affects the uniformity of air distribution and experimental stability. The cleaning process often requires disassembling the entire distribution plate, which is cumbersome and easily damages precision components. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a small, multi-functional integrated drying device to solve the problems of equipment redundancy, functional rigidity, and inconvenience for teaching and comparison caused by the single and independent functions of existing equipment, as mentioned in the background section.

[0005] To solve the above problems, the present invention is implemented through the following technical solution: a small multi-functional integrated drying device, including a base plate, a vertical support plate fixedly connected to the middle of the upper surface of the base plate, a fluidized bed drying chamber, a spray drying chamber, a main controller, a shared centrifugal fan, and a shared electric heater fixedly installed on the front of the vertical support plate, an air filter and an induced draft fan fixedly installed on the upper surface of the base plate, a cyclone dust collector fixedly installed on the back of the vertical support plate, a three-way pipe fixedly connected to the top of the shared electric heater, a fluidized bed feeder fixedly installed on one side of the top of the fluidized bed drying chamber, a support ring, an annular seat, a motor, a fixing plate, and a pressure sensor fixedly installed on the lower part of the inner wall of the fluidized bed drying chamber, and a support ring, an annular seat, a motor, a fixing plate, and a pressure sensor fitted inside the support ring. There are multiple support rods, each of which is fitted with a spring. An inverted conical distribution plate is fixedly connected to the top of each support rod. A fluidized bed discharge pipe is fixedly connected to the middle of the lower surface of the inverted conical distribution plate. A piezoelectric vibrator is fixedly installed at the edge of the lower surface of the inverted conical distribution plate. An internal gear is rotatably installed inside the annular seat. A connecting frame is fixedly connected to the upper surface of the internal gear. A spray pipe and an elastic scraper are fixedly installed on the top of the connecting frame. A feed pipe is fixedly connected to the top of the spray drying chamber. An atomizer is fixedly connected to the bottom end of the feed pipe. An annular distributor is fixedly connected to the top of the inner wall of the spray drying chamber. An air inlet pipe is fixedly connected to the air inlet end of the air filter. A preheating and insulation box is fixedly connected to the outer surface of the air inlet pipe.

[0006] Preferably, the shared centrifugal fan and the shared electric heater are arranged between the fluidized bed drying chamber and the spray drying chamber, the air filter is arranged below the shared centrifugal fan, the top of the air filter is connected to the shared centrifugal fan through a duct, and the top of the shared centrifugal fan is connected to the shared electric heater through a duct.

[0007] Preferably, the support ring, annular seat, motor, and fixing plate are arranged sequentially from top to bottom along the inner wall of the fluidized bed drying chamber. The air pressure sensor is located below the inverted conical distribution plate. The fluidized bed discharge pipe passes through the bottom opening of the fluidized bed drying chamber. Both the fluidized bed discharge pipe and the bottom discharge pipe of the spray drying chamber are equipped with discharge valves. The bottom opening of the fluidized bed drying chamber is threadedly connected to a collection trough.

[0008] Preferably, the top end of the spring is fixedly connected to the side of the lower surface of the inverted conical distribution plate, and the bottom end of the spring is fixedly connected to the upper surface of the support ring.

[0009] Preferably, the output shaft of the motor is fixedly connected to a first bevel gear, the upper surface of the fixed plate is rotatably connected to a rotating rod, the outer surface of the rotating rod is fixedly connected to a second bevel gear, the first bevel gear meshes with the second bevel gear, and the top end of the rotating rod is fixedly connected to an external gear, which meshes with an internal gear.

[0010] Preferably, the nozzle is disposed on one side of the elastic scraper, the air outlet of the nozzle is directly opposite the lower surface of the inverted conical distribution plate, the top of the elastic scraper is in contact with the lower surface of the inverted conical distribution plate, and an air pump is fixedly installed on the lower surface of the connecting frame, the air outlet of the air pump is connected to the air inlet of the nozzle.

[0011] Preferably, one end of the three-way pipe is connected to the fluidized bed drying chamber, and the end of the three-way pipe connected to the fluidized bed drying chamber is located below the inverted conical distribution plate. The other end of the three-way pipe is connected to the annular distributor, and the lower surface of the annular distributor is provided with multiple distribution holes.

[0012] Preferably, a first exhaust pipe is fixedly connected to the top of the fluidized bed drying chamber, a second exhaust pipe is fixedly connected to the lower part of the outer surface of the spray dryer, a connecting exhaust pipe is fixedly connected to the inlet end of the cyclone dust collector, the outlet ends of the first and second exhaust pipes are both connected to the connecting exhaust pipe, and a debris outlet is provided at the bottom of the cyclone dust collector.

[0013] Preferably, a third exhaust pipe is fixedly connected to the top of the cyclone dust collector, the outlet end of the third exhaust pipe is connected to the inlet end of the induced draft fan, a fourth exhaust pipe is fixedly connected to the outlet end of the induced draft fan, the outlet end of the fourth exhaust pipe is connected to the preheating and insulation box, and an exhaust pipe is fixedly connected to the top of the preheating and insulation box.

[0014] Beneficial effects

[0015] This invention provides a small, multifunctional integrated drying device. It has the following advantages:

[0016] 1. This small, multi-functional integrated drying device integrates a fluidized bed drying chamber and a spray drying chamber, and is equipped with a shared centrifugal fan and electric heater, a shared dust removal system, and an integrated air distribution module for air distribution and exhaust gas collection. This invention integrates the two major functions of fluidized bed and spray drying in parallel on one device. It can achieve parallel mode, controlling the two drying chambers to operate independently for teaching demonstrations and comparative experiments, intuitively demonstrating the different treatment effects of the two drying methods on materials. It can also achieve series mode, realizing two-stage drying (spray drying + fluidized bed drying), or independent mode, activating only one drying chamber and its related air valves. This saves on teaching equipment costs and meets the needs of multi-functional teaching experiments.

[0017] 2. This small, multi-functional integrated drying device, by setting a self-cleaning system consisting of a high-frequency vibrator, a rotating scraper, and airflow nozzles at the bottom of the fluidized bed drying chamber, enables online and automated cleaning of the gas distribution plate. This design can effectively prevent and remove the blockage of the micropores of the distribution plate, ensure that the airflow is always uniform and stable, guarantee the reliability of long-term operation of the fluidized bed and the repeatability of experimental data, and at the same time significantly reduce the intensity of manual maintenance and downtime.

[0018] 3. This small, multi-functional integrated drying device uses a waste heat recovery mechanism consisting of an induced draft fan and a preheating insulation box to preheat the fresh air entering the system by using the waste heat of the high-temperature waste gas generated during the drying process. This effectively pre-treats the intake air, significantly reducing the energy load of the subsequent main electric heater and improving the overall energy utilization efficiency of the entire device.

[0019] 4. This small, multi-functional integrated drying device uses a three-way pipe as an air inlet distribution valve and is equipped with an exhaust gas collection valve group consisting of a first exhaust gas pipe, a second exhaust gas pipe, and a connecting exhaust gas pipe. This enables flexible air supply from a single air source to two drying chambers and unified management of multiple exhaust gas paths. This structural design replaces the complex multi-pipeline independent system, significantly simplifies air path connection and switching operations, makes equipment maintenance more convenient, and makes the system configuration more compact and efficient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the rear structure of the entire invention;

[0022] Figure 3 This is a schematic diagram of the structure of the fluidized bed drying chamber of the present invention;

[0023] Figure 4 This is a schematic diagram of the inverted conical distribution plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the spray drying chamber of the present invention.

[0025] In the diagram: 1. Base plate; 2. Vertical support plate; 3. Fluidized bed drying chamber; 4. Spray drying chamber; 5. Main controller; 6. Air filter; 7. Shared centrifugal fan; 8. Shared electric heater; 9. Air inlet pipe; 10. T-joint pipe; 11. Exhaust fan; 12. Cyclone dust collector; 13. Fluidized bed feeder; 14. Support ring; 15. Annular seat; 16. Motor; 17. Fixing plate; 18. Pressure sensor; 19. Support rod; 20. Inverted conical distribution plate; 21. Fluidized bed discharge pipe; 22. Discharge valve; 23. Collection. 24. Slot; 25. Spring; 26. Piezoelectric vibrator; 27. Internal gear; 28. First bevel gear; 29. ​​Rotating rod; 20. Second bevel gear; 31. External gear; 32. Connecting frame; 33. Nozzle; 34. Elastic scraper; 35. Air pump; 36. First exhaust pipe; 37. Feed pipe; 38. Atomizer; 39. Annular distributor; 40. Distribution air hole; 41. Second exhaust pipe; 42. Connecting exhaust pipe; 43. Miscellaneous outlet; 44. Third exhaust pipe; 45. Fourth exhaust pipe; 46. Preheating and insulation box; 47. Exhaust pipe. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0027] Example

[0028] like Figures 1-5As shown, the present invention provides a technical solution: a small multi-functional integrated drying device, including a base plate 1, a vertical support plate 2 fixedly connected to the middle of the upper surface of the base plate 1, a fluidized bed drying chamber 3, a spray drying chamber 4, a main controller 5, a shared centrifugal fan 7, and a shared electric heater 8 fixedly installed on the front of the vertical support plate 2, an air filter 6 and an induced draft fan 11 fixedly installed on the upper surface of the base plate 1, a cyclone dust collector 12 fixedly installed on the back of the vertical support plate 2, a three-way pipe 10 fixedly connected to the top of the shared electric heater 8, a fluidized bed feeder 13 fixedly installed on one side of the top of the fluidized bed drying chamber 3, a support ring 14, an annular seat 15, a motor 16, a fixing plate 17, and a pressure sensor 18 fixedly installed on the lower part of the inner wall of the fluidized bed drying chamber 3, and multiple supports are sleeved inside the support ring 14. Support rod 19, multiple support rods 19 are all fitted with springs 24 on the outside, the top of the support rod 19 is fixedly connected to an inverted conical distribution plate 20, the middle of the lower surface of the inverted conical distribution plate 20 is fixedly connected to a fluidized bed discharge pipe 21, the edge of the lower surface of the inverted conical distribution plate 20 is fixedly installed with a piezoelectric vibrator 25, the annular seat 15 is rotatably equipped with an internal gear 26, the upper surface of the internal gear 26 is fixedly connected to a connecting frame 31, the top of the connecting frame 31 is fixedly installed with a spray pipe 32 and an elastic scraper 33, the top of the spray drying chamber 4 is fixedly connected to a feed pipe 36, the bottom end of the feed pipe 36 is fixedly connected to an atomizer 37, the top of the inner wall of the spray drying chamber 4 is fixedly connected to an annular distributor 38, the air inlet end of the air filter 6 is fixedly connected to an air inlet pipe 9, and the outer surface of the air inlet pipe 9 is fixedly connected to a preheating and insulation box 45.

[0029] A shared centrifugal fan 7 and a shared electric heater 8 are installed between the fluidized bed drying chamber 3 and the spray drying chamber 4. An air filter 6 is installed below the shared centrifugal fan 7. The top of the air filter 6 is connected to the shared centrifugal fan 7 via a duct. The top of the shared centrifugal fan 7 is connected to the shared electric heater 8 via a duct. The air filter 6 is responsible for filtering the air entering the system. The shared centrifugal fan 7 provides the air source power for the entire system. The shared electric heater 8 is used to heat the air to the set temperature.

[0030] The support ring 14, the annular seat 15, the motor 16, and the fixing plate 17 are arranged sequentially from top to bottom along the inner wall of the fluidized bed drying chamber 3. The pressure sensor 18 is located below the inverted conical distribution plate 20. The fluidized bed discharge pipe 21 passes through the bottom opening of the fluidized bed drying chamber 3. Both the fluidized bed discharge pipe 21 and the bottom discharge pipe of the spray drying chamber 4 are equipped with discharge valves 22. The bottom opening of the fluidized bed drying chamber 3 is threadedly connected to a collection tank 23. The pressure sensor 18 monitors the pressure change below the distribution plate in real time to determine the blockage status. The discharge valve 22 controls the discharge of the dried product. The collection tank 23 is used to collect the blockages and impurities removed during the self-cleaning process.

[0031] The top end of the spring 24 is fixedly connected to the side of the lower surface of the inverted conical distribution plate 20, and the bottom end of the spring 24 is fixedly connected to the upper surface of the support ring 14. The support design of the spring 24 gives the inverted conical distribution plate 20 a certain elastic floating space, which can not only buffer the impact of materials, but also effectively transmit the high-frequency vibration generated by the piezoelectric vibrator 25 to the entire plate surface, thereby enhancing the unblocking effect.

[0032] The output shaft of the motor 16 is fixedly connected to a first bevel gear 27. A rotating rod 28 is rotatably connected to the upper surface of the fixed plate 17. A second bevel gear 29 is fixedly connected to the outer surface of the rotating rod 28. The first bevel gear 27 and the second bevel gear 29 mesh with each other. An external gear 30 is fixedly connected to the top of the rotating rod 28. The external gear 30 meshes with the internal gear 26. This bevel gear transmission mechanism converts the horizontal rotational motion of the motor 16 into the vertical rotational motion of the rotating rod 28. Through the meshing of the external gear 30 and the internal gear 26, the connecting frame 31 and the cleaning components on it are ultimately driven to rotate, realizing the conversion of power transmission and motion mode.

[0033] The nozzle 32 is located on one side of the elastic scraper 33. The air outlet of the nozzle 32 is directly opposite the lower surface of the inverted conical distribution plate 20. The top of the elastic scraper 33 is in contact with the lower surface of the inverted conical distribution plate 20. An air pump 34 is fixedly installed on the lower surface of the connecting frame 31. The air outlet of the air pump 34 is connected to the air inlet of the nozzle 32. The elastic scraper 33 is responsible for scraping away the blockages attached to the lower surface of the distribution plate. The air pump 34 and the nozzle 32 blow away the blockages inside the micropores of the distribution plate by spraying high-pressure airflow.

[0034] One end of the three-way pipe 10 is connected to the fluidized bed drying chamber 3. The end of the three-way pipe 10 connected to the fluidized bed drying chamber 3 is located below the inverted conical distribution plate 20. The other end of the three-way pipe 10 is connected to the annular distributor 38. The lower surface of the annular distributor 38 has multiple distribution holes 39. The three-way pipe 10 serves as an airflow distribution hub, flexibly guiding hot air to the fluidized bed or spray drying system. The annular distributor 38 and its distribution holes 39 ensure that the hot air entering the spray drying chamber 4 is evenly distributed downwards and fully contacts the atomized droplets.

[0035] A first exhaust pipe 35 is fixedly connected to the top of the fluidized bed drying chamber 3, and a second exhaust pipe 40 is fixedly connected to the lower part of the outer surface of the spray drying chamber 4. A connecting exhaust pipe 41 is fixedly connected to the inlet end of the cyclone dust collector 12. The outlet ends of both the first exhaust pipe 35 and the second exhaust pipe 40 are connected to the connecting exhaust pipe 41. A debris outlet 42 is provided at the bottom of the cyclone dust collector 12. The first exhaust pipe 35 and the second exhaust pipe 40 collect the exhaust gases generated in the two drying chambers respectively, and then merge them into the cyclone dust collector 12 through the connecting exhaust pipe 41. The cyclone dust collector 12 uses centrifugal force to purify the exhaust gases.

[0036] A third exhaust pipe 43 is fixedly connected to the top of the cyclone dust collector 12. The outlet end of the third exhaust pipe 43 is connected to the inlet end of the induced draft fan 11. A fourth exhaust pipe 44 is fixedly connected to the outlet end of the induced draft fan 11. The outlet end of the fourth exhaust pipe 44 is connected to the preheating and insulation box 45. An exhaust pipe 46 is fixedly connected to the top of the preheating and insulation box 45. The induced draft fan 11 provides power to the exhaust gas treatment system, keeping the system under negative pressure. The preheating and insulation box 45 uses the high-temperature exhaust gas introduced through the fourth exhaust pipe 44 to preheat the fresh air in the inlet pipe 9, realizing heat recovery and improving system energy efficiency.

[0037] The working principle of the above embodiments:

[0038] During system startup, the shared centrifugal fan 7 begins operation, drawing ambient air into the system through the intake pipe 9. After being filtered by the air filter 6, the air enters the shared centrifugal fan 7 and is then precisely heated to the set temperature by the shared electric heater 8. The heated air then reaches the core distribution component, the three-way pipe 10. During the airflow distribution phase, the three-way pipe 10 distributes the hot air to the two drying units according to the set operating mode. When performing fluidized bed drying, the hot air is guided to the bottom of the fluidized bed drying chamber 3, forming a uniform pressure field below the inverted conical distribution plate 20, thus controlling the airflow. The micropores in the inverted conical distribution plate 20 are penetrated, causing the wet material fed from the fluidized bed feeder 13 to fluidize. During this process, if the pressure sensor 18 detects that the pressure in the area below the inverted conical distribution plate 20 gradually increases to a threshold, it indicates that the inverted conical distribution plate 20 is blocked. At this time, the self-cleaning system starts working, and the piezoelectric vibrator 25 generates high-frequency mechanical vibration to loosen the blockage. Then, the motor 16 provides power, causing its output shaft to drive the first bevel gear 27 to rotate. The power is transmitted to the vertically installed rotating... The external gear 30 at the top of the rotating rod 28 meshes with the internal gear 26, transmitting rotational motion to the internal gear 26. The internal gear 26 drives the elastic scraper 33 to rotate via the upper connecting frame 31. The elastic scraper 33 continuously scrapes the lower surface of the distribution plate, effectively removing blockages adhering to the micropore outlet of the distribution plate. Simultaneously, the air pump 34 provides high-pressure airflow to the nozzle 32, blowing away the blockages inside the micropores of the distribution plate. The removed blockages fall along the bottom of the fluidized bed drying chamber 3 into the collection tank 23. The dried material then flows through the fluidized bed drying chamber 3. The exhaust gas is discharged from the bed discharge pipe 21 and enters the subsequent treatment system through the first exhaust pipe 35. During spray drying, hot air enters the annular distributor 38 at the top of the spray drying chamber 4 through the other outlet of the three-way pipe 10. It forms a uniform downward airflow through the distribution air holes 39. At the same time, the liquid material is transported to the atomizer 37 through the feed pipe 36. After being atomized into micron-sized droplets, it is sprayed into the drying chamber. The droplets come into full contact with the downward hot air, and the moisture evaporates instantly. The dried product settles to the bottom of the chamber and is discharged. The exhaust gas enters the subsequent treatment system through the second exhaust pipe 40.

[0039] In the exhaust gas treatment and energy recovery stage, the exhaust gas generated by the two drying systems is collected by the connecting exhaust gas pipe 41 to the cyclone dust collector 12 for primary dust removal. The purified gas is drawn by the induced draft fan 11 through the third exhaust gas pipe 43 and enters the preheating and insulation box 45 through the fourth exhaust gas pipe 44 to preheat the fresh air in the intake pipe 9, thereby realizing the energy recovery of the exhaust gas waste heat. Finally, the exhaust gas is discharged through the exhaust pipe 46. Throughout the entire operation, the main controller 5 performs precise coordination and control of the shared centrifugal fan 7, the shared electric heater 8, the various pipeline valves and the self-cleaning system to ensure that both drying processes can operate stably under optimal parameters.

[0040] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A small multifunctional integrated drying device comprising a base plate (1), characterized in that: The middle of the upper surface of the bottom plate (1) is fixedly connected with a vertical support plate (2), the front surface of the vertical support plate (2) is fixedly installed with a fluidized bed drying chamber (3), a spray drying chamber (4), a main controller (5), a shared centrifugal fan (7) and a shared electric heater (8), the upper surface of the bottom plate (1) is fixedly installed with an air filter (6) and an induced draft fan (11), the back surface of the vertical support plate (2) is fixedly installed with a cyclone dust collector (12), the top of the shared electric heater (8) is fixedly connected with a three-way pipe (10), one side of the top of the fluidized bed drying chamber (3) is fixedly installed with a fluidized bed feeder (13), the lower part of the inner wall of the fluidized bed drying chamber (3) is fixedly installed with a support ring (14), an annular seat (15), a motor (16), a fixed plate (17) and a gas pressure sensor (18), a plurality of support rods (19) are sleeved in the support ring (14), the outer part of the plurality of support rods (19) is sleeved with a spring (24), the top end of the support rod (19) is fixedly connected with an inverted conical distribution plate (20), the middle of the lower surface of the inverted conical distribution plate (20) is fixedly connected with a fluidized bed discharge pipe (21), the edge of the lower surface of the inverted conical distribution plate (20) is fixedly installed with a piezoelectric vibrator (25), the inner part of the annular seat (15) is rotatably provided with an internal gear (26), the upper surface of the internal gear (26) is fixedly connected with a connecting frame (31), the top of the connecting frame (31) is fixedly installed with a spray pipe (32) and an elastic scraper (33), the top of the spray drying chamber (4) is fixedly connected with a feeding pipe (36), the bottom end of the feeding pipe (36) is fixedly connected with an atomizer (37), the top of the inner wall of the spray drying chamber (4) is fixedly connected with an annular distributor (38), the air inlet end of the air filter (6) is fixedly connected with an air inlet pipe (9), the outer surface of the air inlet pipe (9) is fixedly connected with a preheating heat preservation box (45).

2. A compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The shared centrifugal fan (7) and the shared electric heater (8) are arranged between the fluidized bed drying chamber (3) and the spray drying chamber (4), the air filter (6) is arranged below the shared centrifugal fan (7), the top of the air filter (6) is connected with the shared centrifugal fan (7) through a pipeline, and the top of the shared centrifugal fan (7) is connected with the shared electric heater (8) through a pipeline.

3. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The support ring (14), the annular seat (15), the motor (16) and the fixed plate (17) are sequentially arranged from top to bottom along the inner wall of the fluidized bed drying chamber (3), the gas pressure sensor (18) is arranged below the inverted conical distribution plate (20), the fluidized bed discharge pipe (21) penetrates through the bottom opening of the fluidized bed drying chamber (3), the fluidized bed discharge pipe (21) and the bottom discharge pipe of the spray drying chamber (4) are both provided with a discharge valve (22), and the bottom opening of the fluidized bed drying chamber (3) is threadedly connected with a collecting tank (23).

4. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The top end of the spring (24) is fixedly connected at the side of the lower surface of the inverted conical distribution plate (20), and the bottom end of the spring (24) is fixedly connected to the upper surface of the support ring (14).

5. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The output shaft of the motor (16) is fixedly connected with a first bevel gear (27), the upper surface of the fixed plate (17) is rotatably connected with a rotating rod (28), the outer surface of the rotating rod (28) is fixedly connected with a second bevel gear (29), the first bevel gear (27) is engaged with the second bevel gear (29), the top end of the rotating rod (28) is fixedly connected with an external gear (30), and the external gear (30) is engaged with the internal gear (26).

6. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The nozzle (32) is arranged on one side of the elastic scraper (33), the gas outlet of the nozzle (32) is opposite to the lower surface of the inverted conical distribution plate (20), the top of the elastic scraper (33) is in contact with the lower surface of the inverted conical distribution plate (20), and the lower surface of the connecting frame (31) is fixedly connected with the air pump (34).

7. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: One side of the tee pipe (10) is connected with the fluidized bed drying chamber (3), the tee pipe (10) is arranged below the inverted conical distribution plate (20) and connected with the fluidized bed drying chamber (3), the other side of the tee pipe (10) is connected with the annular distributor (38), and the lower surface of the annular distributor (38) is provided with a plurality of distribution holes (39).

8. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The top of the fluidized bed drying chamber (3) is fixedly connected with a first tail gas pipe (35), the lower surface of the spray drying chamber (4) is fixedly connected with a second tail gas pipe (40), the inlet end of the cyclone dust collector (12) is fixedly connected with a communication tail gas pipe (41), the outlet ends of the first tail gas pipe (35) and the second tail gas pipe (40) are connected with the communication tail gas pipe (41), and the bottom of the cyclone dust collector (12) is provided with an outlet (42).

9. The compact multifunctional integrated drying apparatus according to claim 1, characterized in that: The top of the cyclone dust collector (12) is fixedly connected with a third tail gas pipe (43), the outlet end of the third tail gas pipe (43) is connected with the inlet end of the induced draft fan (11), the outlet end of the induced draft fan (11) is fixedly connected with a fourth tail gas pipe (44), the outlet end of the fourth tail gas pipe (44) is connected with a preheating insulation box (45), and the top of the preheating insulation box (45) is fixedly connected with an exhaust pipe (46).

Images