Closed cycle flash evaporation type rotational flow drying equipment

Abstract

The utility model discloses closed cycle flash evaporation type rotational flow drying equipment, and particularly relates to the technical field of drying equipment, the closed cycle flash evaporation type rotational flow drying equipment comprises a supporting frame, a mounting box is fixedly arranged at the top of the supporting frame, an air heater is arranged in the mounting box, one end of the mounting box is communicated with an air inlet pipe, and a circulating mechanism is arranged on one side of the mounting box. The circulating mechanism comprises a circulating pipe arranged on one side of the mounting box in a communicating mode, one end of the circulating pipe is provided with an air pump in a communicating mode, the input end of the air pump is provided with a filtering box in a communicating mode, two fixing frames are fixedly arranged in the filtering box, and filtering plates are arranged in the two fixing frames in a sliding mode. Hot air is recycled, energy consumption is reduced, meanwhile, a stable drying environment is maintained, the material drying quality is guaranteed, the hot air can effectively surround and enter the drying tower through multi-stage separation and filtration, a good thermal environment is created for material drying, and the drying efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and more specifically, to a closed-loop circulating flash cyclone drying equipment. Background Technology

[0002] Flash drying is a relatively advanced drying concept. It uses a high-speed hot airflow to disperse the material instantly and make full contact with the hot airflow, achieving rapid heat and mass transfer. The moisture in the material is rapidly vaporized and carried away by the airflow, which greatly shortens the drying time.

[0003] Existing methods address the issue that the moisture carried in the gas emitted after the materials produced by the aqueous phase process will not pollute the environment. However, for materials with low melting points or containing water of crystallization, the drying time in dry air is not long enough, resulting in insufficient drying of the materials.

[0004] A search revealed that Chinese patent CN219440704U discloses a closed-loop flash cyclone dryer. In this structure, nitrogen gas drawn in by an induced draft fan is heated by a steam heater and then enters the flash cyclone dryer at high speed tangentially from the bottom. Wet material is quantitatively added to the flash cyclone dryer by a screw feeder according to the set operating conditions. The material falls to the bottom of the flash cyclone dryer in clumps and is rapidly pulverized into microparticles by a high-speed rotating pulverizer installed at the bottom of the flash cyclone dryer. The microparticles are then further pulverized by the high-speed hot airflow. Under the dual impact of the airflow, the material particles boil and come into full contact with the hot air, causing the moisture to evaporate rapidly. They rotate in the drying chamber with the airflow and undergo gas-solid separation under the action of the cyclone baffle. After separation, the gas enters the next drying chamber through the central hole and repeats the original material filling process. This process allows the material to stay in the drying chamber for a long time. The wet material is dried well by the heat provided by the heat transfer from the hot gas convection and the heat transfer from the heating jacket. Finally, the dry powder enters the cyclone separator with the airflow for gas-solid separation.

[0005] However, in actual use, although the structure achieves gas circulation, the circulating gas contains residual fine powder of the material and dust mixed in with the production environment. These impurities will re-enter the drying chamber with the airflow and come into contact with the material, which may adhere to the surface of the material particles. This will cause the final dry powder to be mixed with impurities, reduce the purity of the product, affect its quality, and thus affect the overall use effect. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a closed-loop circulating flash cyclone drying device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A closed-loop flash cyclone dryer includes a support frame, a mounting box fixedly installed on the top of the support frame, a hot air fan installed inside the mounting box, an air inlet pipe connected to one end of the mounting box, and a circulation mechanism installed on one side of the mounting box.

[0009] The circulation mechanism includes a circulation pipe connected to one side of the mounting box, an air pump connected to one end of the circulation pipe, a filter box connected to the input end of the air pump, two fixed frames fixedly installed inside the filter box, filter plates slidably installed inside each of the two fixed frames, a stabilizing frame fixedly installed on one side of the filter box, a sealing cover inserted into the stabilizing frame, an exhaust pipe connected to one side of the circulation pipe, a solenoid valve installed on one side of both the exhaust pipe and the circulation pipe, a conveying pipe extending through one side of the filter box, and a bag filter dust collector connected to one end of the conveying pipe.

[0010] By adopting the above technical solution, hot air is recycled, reducing energy consumption while maintaining a stable drying environment and ensuring the quality of material drying.

[0011] As a further description of the above technical solution: a gas-solid separation mechanism is provided at one end of the bag filter, the gas-solid separation mechanism includes a first through pipe connected to one end of the bag filter, one end of the first through pipe connected to a cyclone dust collector, a fixed frame fixedly provided on the outside of the cyclone dust collector, a second through pipe connected to one end of the cyclone dust collector, a cyclone separator connected to one end of the second through pipe, and a third through pipe connected to one end of the cyclone separator.

[0012] By adopting the above technical solution, multi-stage separation can efficiently remove material particles from the airflow, significantly improve gas-solid separation efficiency, effectively reduce material loss with gas, increase material recovery rate, reduce production costs, and at the same time ensure the uniformity of the quality of collected materials.

[0013] As a further description of the above technical solution: one end of the third pipe is connected to a drying tower, one side of the drying tower is connected to a feed pipe, a stabilizing frame is fixedly installed at the bottom of the drying tower, an outer sleeve is fixedly installed on the outside of the drying tower, one end of the outer sleeve is connected to a connecting frame, a discharge pipe is provided through the bottom of the drying tower, one end of the connecting frame passes through the mounting box and extends into the mounting box, a connecting pipe is connected to the top of the connecting frame, and one end of the connecting pipe passes through the drying tower and extends into the drying tower.

[0014] By adopting the above technical solution, hot air can effectively circulate and enter the interior of the drying tower, creating a good thermal environment for material drying, improving drying efficiency, and the overall structure ensures that the material is dried stably in the drying tower, promoting full utilization of heat and helping to stably produce high-quality dried products.

[0015] As a further description of the above technical solution: a heat dissipation box is fixedly installed at the bottom of the drying tower, and multiple heat dissipation holes are opened on the surface of the heat dissipation box. A motor is installed inside the heat dissipation box, and a rotating shaft is fixedly installed at the output end of the motor. Two stirring frames are fixedly installed outside the rotating shaft, and multiple stirring rods are fixedly installed on the surface of each of the two stirring frames.

[0016] By adopting the above technical solutions, materials can be evenly dispersed, the contact area with hot air can be increased, drying efficiency can be improved, the material can be dried evenly, which helps to stabilize product quality and make the degree of drying of the produced materials more consistent.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. By setting up a circulation mechanism, compared with existing technologies, after the hot air participates in the drying of materials in the drying tower, it is not directly discharged, but returns to the hot air blower through circulation pipes and other components to be reheated, and then enters the drying tower again for continued recycling. This allows the heat to be reused multiple times, greatly reducing heat loss and energy waste. During the gas circulation process, the filter box plays a key role in further purifying the gas. The gas needs to pass through the filter plates in two fixed frames, which can intercept and filter the trace amounts of impurities and dust that may still remain in the gas after the previous multi-stage gas-solid separation, further improving the purity of the circulating gas. Moreover, the design of the filter plates is easy to clean and replace, ensuring that the filter box can maintain good filtration performance for a long time. This not only provides a high-quality and clean gas guarantee for the recycling of hot air, but also facilitates external discharge.

[0019] 2. By setting up a gas-solid separation mechanism, compared with existing technologies, the cyclone separator uses the principle of centrifugal force to throw most of the material particles against the wall and collect them. Then, it enters the cyclone dust collector, where centrifugal force is used again to further remove the remaining material particles. Finally, it passes through the bag filter dust collector, where the filter bags precisely intercept fine particles, ensuring that almost all materials can be separated from the airflow for collection. This significantly improves the material recovery rate, effectively reduces production costs caused by material waste, and improves production efficiency. Starting the motor at the bottom of the drying tower drives the stirring frame and stirring rods to agitate and stir the material, making the material evenly dispersed in the drying tower, avoiding agglomeration and accumulation. This significantly increases the contact area between the material and the hot air, allowing the hot air to penetrate the material layer more fully, making heat transfer more efficient and effectively improving drying efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall rear view structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the overall front view of the present invention.

[0023] Figure 4 This is a schematic diagram of the circulation mechanism of this utility model.

[0024] Figure 5 This is a schematic diagram of the solid separation mechanism of this utility model.

[0025] Figure 6 This is a schematic cross-sectional view of the drying tower of this utility model.

[0026] The attached diagram is labeled as follows: 1. Support frame; 2. Mounting box; 3. Hot air blower; 4. Air inlet pipe; 5. Circulation pipe; 6. Air pump; 7. Filter box; 8. Fixing frame; 9. Filter plate; 10. Stabilizing frame; 11. Sealing cover; 12. Exhaust pipe; 13. Conveying pipe; 14. Bag filter; 15. First through pipe; 16. Cyclone dust collector; 17. Fixing frame; 18. Second through pipe; 19. Cyclone separator; 20. Third through pipe; 21. Drying tower; 22. Outer sleeve; 23. Connecting frame; 24. Connecting pipe; 25. Heat dissipation box; 26. Rotating shaft; 27. Stirring frame; 28. Stirring rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The embodiments disclosed in this application are as follows: Figure 1-6 The closed-loop flash cyclone dryer shown includes a support frame 1, an installation box 2 fixedly installed on the top of the support frame 1, a hot air fan 3 installed inside the installation box 2, an air inlet pipe 4 connected to one end of the installation box 2, and a circulation mechanism installed on one side of the installation box 2.

[0029] The circulation mechanism includes a circulation pipe 5 connected to one side of the mounting box 2. One end of the circulation pipe 5 is connected to an air pump 6, and the input end of the air pump 6 is connected to a filter box 7. Two fixed frames 8 are fixedly installed inside the filter box 7, and filter plates 9 are slidably installed inside each of the two fixed frames 8. A stabilizing frame 10 is fixedly installed on one side of the filter box 7, and a sealing cover 11 is inserted into the inside of the stabilizing frame 10. An exhaust pipe 12 is connected to one side of the circulation pipe 5. Solenoid valves are installed on both the exhaust pipe 12 and one side of the circulation pipe 5. A through-type valve is installed on one side of the filter box 7. The conveying pipe 13 is connected to a bag filter 14 at one end. The gas entering the filter box 7 needs to pass through the filter plates 9 in the two fixed frames 8. The filter plates 9 can intercept and filter the very small amount of impurities and dust that may remain in the gas, further purifying the gas. After long-term use, if too many impurities are trapped on the filter plates 9 and affect the filtration effect, the sealing cover 11 can be pulled up to open the stabilizing frame 10 and the filter plates 9 can be pulled out from the fixed frames 8 for cleaning or replacement to ensure that the filter box 7 continues to have good filtration performance.

[0030] After being purified by the filter box 7, the gas flows towards the installation box 2 through the circulation pipe 5 under the suction of the air pump 6. Solenoid valves are installed on both the circulation pipe 5 and the exhaust pipe 12. The flow direction of the gas can be adjusted by controlling the opening and closing of the solenoid valves according to the actual drying conditions. Under normal circumstances, most of the gas participates in the circulation through the circulation pipe 5. Only when it is necessary to adjust the overall pressure and discharge some waste gas will the solenoid valve on the exhaust pipe 12 be opened to allow some gas to be discharged.

[0031] After the gas returns to the mounting box 2 through the circulation pipe 5, it is drawn back into the hot air blower 3. The hot air blower 3 reheats the gas, restoring it to a high temperature suitable for drying the material. Then, the hot air re-enters the drying tower 21 through the air inlet pipe 4, connecting frame 23, and connecting pipe 24 to continue participating in the drying process of the newly entered material.

[0032] Reference Figure 2-3 As shown, a gas-solid separation mechanism is provided at one end of the bag filter 14. This mechanism includes a first pipe 15 connected to one end of the bag filter 14, with one end of the first pipe 15 connected to a cyclone dust collector 16. A fixing frame 17 is fixedly installed on the outside of the cyclone dust collector 16. A second pipe 18 is connected to one end of the cyclone dust collector 16, with one end of the second pipe 18 connected to a cyclone separator 19. A third pipe 20 is connected to one end of the cyclone separator 19. A mixed airflow carrying water vapor and material particles enters the cyclone separator 19 through the third pipe 20. Inside, the airflow rotates at high speed along the tangential direction. According to the principle of centrifugal force, the material particles are thrown against the wall by the strong centrifugal force, and then slide down the wall under the action of gravity to the bottom of the cyclone separator 19 for collection, realizing the first separation of material and airflow. The separated airflow continues to rise through the second pipe 18 and enters the cyclone dust collector 16. In the cyclone dust collector 16, the centrifugal force generated by the rotation of the airflow and its internal structural design is also used to further remove some of the residual material particles in the airflow, so that the material carried by the airflow is further reduced. The airflow then flows to the bag filter 14 through the first pipe 15.

[0033] Reference Figure 4-5 As shown, one end of the third conduit 20 is connected to a drying tower 21, and a feed pipe is connected to one side of the drying tower 21. A stabilizing frame is fixedly installed at the bottom of the drying tower 21, and an outer sleeve 22 is fixedly installed on the outside of the drying tower 21. A connecting frame 23 is connected to one end of the outer sleeve 22, and a discharge pipe is installed through the bottom of the drying tower 21. One end of the connecting frame 23 passes through the mounting box 2 and extends into the mounting box 2. A connecting pipe 24 is connected to the top of the connecting frame 23, and one end of the connecting pipe 24 passes through the drying tower 21 and extends into the drying tower 21. Extending the section, the hot air blower 3 is started. The high-temperature hot air generated by the hot air blower enters the connecting frame 23 through the air inlet pipe 4, and then flows into the space between the outer sleeve 22 and the drying tower 21 to preheat the outer wall of the drying tower. At the same time, some of the hot air will enter the interior of the drying tower 21 through the connecting pipe 24, so that the overall temperature of the drying tower 21 gradually increases, creating a suitable drying thermal environment for the material to be entered. After the drying tower 21 is preheated, the material to be dried is continuously and stably fed into the interior of the drying tower 21 through the feed pipe on one side of the drying tower 21.

[0034] Reference Figure 6As shown, a heat dissipation box 25 is fixedly installed at the bottom of the drying tower 21. Multiple heat dissipation holes are opened on the surface of the heat dissipation box 25. A motor is installed inside the heat dissipation box 25, and a rotating shaft 26 is fixedly installed at the output end of the motor. Two stirring frames 27 are fixedly installed outside the rotating shaft 26, and multiple stirring rods 28 are fixedly installed on the surface of each stirring frame 27. When the motor inside the heat dissipation box 25 at the bottom of the drying tower 21 is started, the motor drives the rotating shaft 26 to rotate. The multiple stirring frames 27 fixed on the rotating shaft 26 and the multiple stirring rods 28 on the stirring frames 27 rotate synchronously, causing the stirring frames 27 and stirring rods 28 to continuously tumble and stir. Animal feed is used to evenly disperse the material within the drying tower 21, preventing agglomeration and increasing the contact area between the material and hot air. At this time, the hot air entering the drying tower from the connecting pipe 24 and the hot air between the outer sleeve 22 and the drying tower 21 pass through the material layer and come into full contact with the material. The hot air transfers heat to the material, and the moisture in the material absorbs the heat and quickly reaches its boiling point, starting to evaporate and form water vapor, achieving a flash drying effect. Under the continuous action of stirring and hot air, the material continuously tumbles, and the moisture inside continues to evaporate, gradually reducing the moisture content, and the drying process continues.

[0035] Working principle of this utility model:

[0036] This utility model is a closed-loop circulating flash cyclone dryer. When using this device...

[0037] Start the hot air blower 3. The high-temperature hot air generated by the hot air blower enters the connecting frame 23 through the air inlet pipe 4, and then flows into the space between the outer sleeve 22 and the drying tower 21 to preheat the outer wall of the drying tower. At the same time, some of the hot air will enter the interior of the drying tower 21 through the connecting pipe 24, so that the overall temperature of the drying tower 21 gradually increases, creating a suitable drying environment for the material that is about to enter.

[0038] After the drying tower 21 is preheated, the material to be dried is continuously and stably fed into the drying tower 21 through the feed pipe on one side of the drying tower 21. After the material enters the drying tower 21, the motor in the heat dissipation box 25 at the bottom of the drying tower 21 is started at the same time. The motor drives the rotating shaft 26 to rotate. Multiple stirring frames 27 and multiple stirring rods 28 fixed on the rotating shaft 26 rotate synchronously. The stirring frames 27 and stirring rods 28 continuously turn and stir the material, so that the material is evenly dispersed in the drying tower 21, avoiding the phenomenon of material agglomeration and increasing the contact area between the material and the hot air. At this time, the hot air entering the drying tower from the connecting pipe 24 and the hot air between the outer sleeve 22 and the drying tower 21 pass through the material layer and come into full contact with the material. The hot air transfers heat to the material. After absorbing the heat, the moisture in the material quickly reaches the boiling point and begins to evaporate to form water vapor, realizing the flash drying effect. Under the continuous action of stirring and hot air, the material continues to roll, and the moisture inside continues to evaporate, and the moisture content gradually decreases. The drying process continues.

[0039] A mixed airflow carrying water vapor and material particles enters the cyclone separator 19 through the third pipe 20. Inside the cyclone separator 19, the airflow rotates at high speed along the tangential direction. According to the principle of centrifugal force, the material particles are thrown against the wall by a strong centrifugal force, and then slide down the wall under the action of gravity to the bottom of the cyclone separator 19 for collection, realizing the first separation of material and airflow. The separated airflow continues to rise through the second pipe 18 and enters the cyclone dust collector 16. In the cyclone dust collector 16, the centrifugal force generated by the rotation of the airflow and its internal structural design is also used to further remove some of the material particles remaining in the airflow, further reducing the material carried by the airflow. The airflow then flows to the bag filter 14 through the first pipe 15.

[0040] The airflow entering the bag filter 14 passes through the filter bag. During this process, fine material particles are intercepted by the filter bag and adhere to the surface of the filter bag, while clean gas passes through the filter bag and enters the filter box 7 through the conveying pipe 13. This completes a relatively fine gas-solid separation process, ensuring that the dust content of the discharged gas is extremely low, which meets the requirements of closed-loop circulation and environmental protection.

[0041] The gas entering the filter box 7 needs to pass through the filter plates 9 in the two fixed frames 8 one after the other. The filter plates 9 can intercept and filter the very small amount of impurities and dust that may remain in the gas, further purifying the gas. After a long period of use, if too many impurities are trapped on the filter plates 9 and affect the filtration effect, the sealing cover 11 can be pulled up to open the stabilizing frame 10, and the filter plates 9 can be pulled out from the fixed frames 8 for cleaning or replacement to ensure that the filter box 7 continues to have good filtration performance.

[0042] After being purified by the filter box 7, the gas flows towards the installation box 2 through the circulation pipe 5 under the suction of the air pump 6. Solenoid valves are installed on both the circulation pipe 5 and the exhaust pipe 12. The flow direction of the gas can be adjusted by controlling the opening and closing of the solenoid valves according to the actual drying conditions. Under normal circumstances, most of the gas participates in the circulation through the circulation pipe 5. Only when it is necessary to adjust the overall pressure and discharge some waste gas will the solenoid valve on the exhaust pipe 12 be opened to allow some gas to be discharged.

[0043] After the gas returns to the mounting box 2 through the circulation pipe 5, it is drawn back into the hot air blower 3. The hot air blower 3 reheats the gas, restoring it to a high temperature suitable for drying the material. Then, the hot air re-enters the drying tower 21 through the air inlet pipe 4, connecting frame 23, and connecting pipe 24 to continue participating in the drying process of the newly entered material. This cycle repeats continuously, forming a complete closed-loop flash vortex drying process that continuously dries the material until it meets the predetermined drying index requirements and is then discharged and collected from the discharge pipe of the drying tower 21.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A closed-loop flash cyclone dryer, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly provided with an installation box (2), a hot air blower (3) is installed inside the installation box (2), an air inlet pipe (4) is connected to one end of the installation box (2), and a circulation mechanism is provided on one side of the installation box (2). The circulation mechanism includes a circulation pipe (5) connected to one side of the mounting box (2), one end of the circulation pipe (5) is connected to an air pump (6), the input end of the air pump (6) is connected to a filter box (7), two fixed frames (8) are fixedly installed inside the filter box (7), and filter plates (9) are slidably installed inside the two fixed frames (8). A stabilizing frame (10) is fixedly installed on one side of the filter box (7), and a sealing cover (11) is inserted into the inside of the stabilizing frame (10).

2. The closed-loop flash cyclone dryer according to claim 1, characterized in that: An exhaust pipe (12) is connected to one side of the circulation pipe (5). Solenoid valves are provided on one side of both the exhaust pipe (12) and the circulation pipe (5). A conveying pipe (13) is provided through one side of the filter box (7). A bag filter (14) is connected to one end of the conveying pipe (13).

3. The closed-loop flash cyclone dryer according to claim 2, characterized in that: One end of the bag filter (14) is provided with a gas-solid separation mechanism. The gas-solid separation mechanism includes a first pipe (15) connected to one end of the bag filter (14). One end of the first pipe (15) is connected to a cyclone dust collector (16). A fixing frame (17) is fixedly provided on the outside of the cyclone dust collector (16).

4. The closed-loop flash cyclone dryer according to claim 3, characterized in that: One end of the cyclone dust collector (16) is connected to a second pipe (18), one end of the second pipe (18) is connected to a cyclone separator (19), and one end of the cyclone separator (19) is connected to a third pipe (20).

5. The closed-loop flash cyclone dryer according to claim 4, characterized in that: One end of the third pipe (20) is connected to a drying tower (21), one side of the drying tower (21) is connected to a feed pipe, a stabilizing frame is fixedly installed at the bottom of the drying tower (21), an outer sleeve (22) is fixedly installed on the outside of the drying tower (21), a connecting frame (23) is connected to one end of the outer sleeve (22), and a discharge pipe is provided through the bottom of the drying tower (21).

6. The closed-loop flash cyclone dryer according to claim 5, characterized in that: One end of the connecting frame (23) passes through the mounting box (2) and extends into the mounting box (2). A connecting pipe (24) is provided at the top of the connecting frame (23). One end of the connecting pipe (24) passes through the drying tower (21) and extends into the drying tower (21).

7. The closed-loop flash cyclone dryer according to claim 5, characterized in that: A heat dissipation box (25) is fixedly installed at the bottom of the drying tower (21). Multiple heat dissipation holes are opened on the surface of the heat dissipation box (25). A motor is installed inside the heat dissipation box (25), and a rotating shaft (26) is fixedly installed at the output end of the motor.

8. The closed-loop flash cyclone dryer according to claim 7, characterized in that: Two stirring frames (27) are fixedly installed on the outside of the rotating shaft (26), and multiple stirring rods (28) are fixedly installed on the surface of each of the two stirring frames (27).

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