Hot air circulation drying device for processing phosphogypsum

Abstract

The utility model discloses a kind of hot air circulation drying devices of phosphogypsum processing, including supporting bottom plate, drying rotary cylinder and drying oven, supporting bottom plate is equipped with mounting plate frame and pipe bracket, drying rotary cylinder is rotated by the cooperation of first installation sliding ring and sliding groove, circulating air inlet pipe and air outlet pipe are slidably connected with drying rotary cylinder by second installation sliding ring, drying oven is equipped with electric heater and molecular sieve dehumidification device, hot air is sent into drying rotary cylinder by circulating air pump to phosphogypsum is dried, moisture is re-heated and recycled after being absorbed by molecular sieve, energy consumption is significantly reduced. Servo motor drives drying rotary cylinder to rotate, cooperate with scattering pole frame to make material fully dispersed, improve drying efficiency, device is also equipped with temperature sensor, sealed box door and pull-out type molecular sieve replacement structure, realize accurate temperature control and convenient maintenance. The utility model has the advantages of high heat energy utilization rate, uniform drying, reliable anti-blocking and the like, and is suitable for industrialized drying treatment of phosphogypsum.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically to a hot air circulating drying device for phosphogypsum processing. Background Technology

[0002] Phosphogypsum is a solid waste generated in the wet process of phosphoric acid production. Its main component is calcium sulfate dihydrate. The composition of phosphogypsum is relatively complex. In addition to calcium sulfate, it also contains incompletely decomposed phosphate rock, residual phosphoric acid, fluorides, acid-insoluble substances, organic matter, etc. Phosphogypsum needs to be dehydrated during processing, and is often dried by direct contact of hot air with wet phosphogypsum.

[0003] The prior art discloses a phosphogypsum dehydration device with application number CN202222030481.3. Although this utility model can use the drying components to dry and dehydrate the phosphogypsum material introduced into the dehydration cylinder, the hot air is quickly discharged through the air outlet of the connecting box after contacting the phosphogypsum material. This results in a large amount of residual heat contained in the drying hot air being directly discharged, leading to heat energy waste and increasing the energy consumption required for drying and dehydrating phosphogypsum. Its practicality is relatively limited. In view of the shortcomings of this utility model, those skilled in the art have proposed a hot air circulation drying device for phosphogypsum processing. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a hot air circulation drying device for phosphogypsum processing. It has the advantages of enabling the drying hot air to be recycled and reused, greatly reducing heat energy waste, reducing energy consumption, making it more energy-efficient and practical, thereby solving the problems mentioned in the background technology.

[0005] (II) Technical Solution To achieve the aforementioned advantages of enabling the recycling of drying hot air, significantly reducing heat waste, decreasing energy consumption, and improving energy efficiency and practicality, the specific technical solution adopted by this utility model is as follows: A hot air circulation drying device for phosphogypsum processing includes a supporting base plate, a drying rotary drum, and a drying chamber. A mounting frame is symmetrically welded to the top surface of the supporting base plate, and a first mounting groove is provided on the mounting frame. First mounting rings are symmetrically welded to the side walls of the drying rotary drum, and the first mounting rings are slidably embedded within the first mounting rings. A pipe bracket is symmetrically welded to the top surface of the supporting base plate, and a circulating air inlet pipe and a circulating air outlet pipe are respectively fixedly installed on the pipe bracket. Second mounting grooves are symmetrically provided at both ends of the drying rotary drum. The outer walls of the circulating air inlet pipe and the circulating air outlet pipe are welded with second mounting slip rings, which are slidably embedded in the second mounting grooves. The mounting plate frame is welded and fixed to the drying chamber, and several electric heaters are evenly installed on one side of the inner cavity of the drying chamber. One end of the circulating air inlet pipe is connected to one side of the inner cavity of the drying chamber, and one end of the circulating air outlet pipe is connected to the other side of the inner cavity of the drying chamber. A circulating air pump is installed on the circulating air inlet pipe. A placement platform is bolted to the bottom surface of the inner cavity of the drying chamber, and a pull-out sliding groove is symmetrically opened on the placement platform. A pull-out sliding plate is slidably embedded in the pull-out sliding groove. A placement plate is welded to the top of the pull-out sliding plate, and a placement mesh frame is welded to the top surface of the placement plate. A molecular sieve is placed in the placement mesh frame.

[0006] By combining hot air circulation, molecular sieve dehumidification, and rotary drying, efficient, energy-saving, and continuous drying of phosphogypsum is achieved. At the same time, the structure is stable and easy to maintain, making it suitable for industrial production needs.

[0007] Furthermore, a servo motor is bolted to one side of the mounting plate, and a drive shaft is keyed to the output end of the servo motor. A drive gear is welded to the drive shaft. A drive gear ring is welded to the side wall of the drying rotary drum, and the drive gear ring meshes with the drive gear. A connecting rod is symmetrically welded to one end of the circulating air inlet pipe in the inner cavity of the drying rotary drum. Several dispersing rods are evenly welded to the connecting rod, and an anti-clogging scraper is welded to one end of the connecting rod. An intercepting filter is welded to one side of the inner cavity of the drying rotary drum.

[0008] The drive and stirring structure uses a servo motor to precisely control the drying speed, combined with a dispersing rod to optimize heat exchange efficiency, and utilizes an intercepting filter and an anti-clogging scraper to achieve self-cleaning, ensuring long-term stable operation of the device. It is suitable for drying phosphogypsum in high humidity and easy-to-cab environments.

[0009] Furthermore, a sealed door is installed on one side of the drying oven via a hinge, and a handle is welded and fixed to the sealed door.

[0010] Furthermore, a temperature sensor is fixedly installed at one end of the circulating air inlet pipe inside the drying rotating cylinder.

[0011] Furthermore, a feed hopper is welded to one side of the inner cavity of the drying rotary drum, and a feed valve is installed on the feed hopper.

[0012] Furthermore, a control panel is fixedly mounted on the mounting plate frame, and the control panel is electrically connected to the servo motor, circulating air pump, electric heater and temperature sensor.

[0013] Furthermore, the cross-sectional shape of the circulating air intake pipe and the circulating air outlet pipe is U-shaped.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides a hot air circulating drying device for phosphogypsum processing, which has the following beneficial effects: (1) This utility model heats air with an electric heater and uses a circulating air pump to send hot air into the drying rotating drum to dry phosphogypsum. The dried hot air is dehumidified by molecular sieve and then reheated and recycled, which greatly reduces heat energy waste. Combined with a temperature sensor, it achieves precise temperature control, significantly reduces energy consumption, and has outstanding energy-saving effect.

[0015] (2) This utility model is equipped with a servo motor, a drying rotating drum, an anti-clogging scraper and an intercepting filter. The servo motor drives the drying rotating drum to rotate, and the material is fully contacted with the hot air by the dispersing rod, which improves the drying efficiency. The intercepting filter and the rotating anti-clogging scraper work together to effectively prevent phosphogypsum from clogging the pipe. At the same time, it realizes automatic discharge, which is easy to operate and has strong stability in continuous operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a hot air circulating drying device for processing phosphogypsum according to an embodiment of the present invention; Figure 2 This is a front view of a hot air circulating drying device for processing phosphogypsum according to an embodiment of the present invention; Figure 3 According to the embodiments of this utility model Figure 1 Enlarged view of point A; Figure 4 According to the embodiments of this utility model Figure 1 Enlarged view of point B; Figure 5 According to the embodiments of this utility model Figure 2 Enlarged view of point C; Figure 6 This is a perspective view of the drying chamber of a hot air circulating drying device for processing phosphogypsum according to an embodiment of the present invention.

[0018] In the picture: 1. Support base plate; 2. Drying rotary drum; 3. Connecting rod frame; 4. Dispersing rod frame; 5. Mounting plate frame; 6. Pipe bracket; 7. Circulating air inlet pipe; 8. Inlet and outlet valves; 9. Inlet and outlet hoppers; 10. Anti-clogging scraper; 11. Servo motor; 12. Intercepting filter screen; 13. Circulating air outlet pipe; 14. Circulating air pump; 15. Drying oven; 16. Electric heater; 17. Molecular sieve; 18. First mounting slide; 19. First mounting sliding ring; 20. Drive shaft; 21. Drive gear; 22. Drive gear ring; 23. Second mounting slide; 24. Second mounting sliding ring; 25. Temperature sensor; 26. Pull-out slide; 27. Pull-out sliding plate; 28. Placement platform; 29. ​​Placement plate; 30. Placement mesh frame; 31. Hinge; 32. Sealing box door; 33. Handle. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0020] According to an embodiment of the present invention, a hot air circulating drying device for processing phosphogypsum is provided.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-6As shown, the hot air circulating drying device for phosphogypsum processing according to an embodiment of the present invention includes a supporting base plate 1, a drying rotating cylinder 2, and a drying box 15. A mounting bracket 5 is symmetrically welded to the top surface of the supporting base plate 1, and a first mounting groove 18 is provided on the mounting bracket 5. First mounting rings 19 are symmetrically welded to the side walls of the drying rotating cylinder 2, and the first mounting rings 19 are slidably embedded within the first mounting rings 19. A pipe bracket 6 is symmetrically welded to the top surface of the supporting base plate 1, and a circulating air inlet pipe 7 and a circulating air outlet pipe 13 are respectively fixedly installed on the pipe bracket 6. Second mounting grooves 23 are symmetrically provided at both ends of the drying rotating cylinder 2. Second mounting rings 24 are welded to the outer walls of the circulating air inlet pipe 7 and the circulating air outlet pipe 13, and the second mounting rings 24... The sliding clip is installed in the second mounting groove 23. The drying box 15 is fixedly welded to the five mounting brackets. Several electric heaters 16 are evenly installed on one side of the inner cavity of the drying box 15. One end of the circulating air inlet pipe 7 is connected to one side of the inner cavity of the drying box 15, and one end of the circulating air outlet pipe 13 is connected to the other side of the inner cavity of the drying box 15. A circulating air pump 14 is installed on the circulating air inlet pipe 7. A placement platform 28 is bolted to the bottom surface of the inner cavity of the drying box. A pull-out groove 26 is symmetrically opened on the placement platform 28. A pull-out slide plate 27 is slidably clipped into the pull-out groove 26. A placement plate 29 is welded to the top of the pull-out slide plate 27. A placement mesh frame 30 is welded to the top surface of the placement plate 29. A molecular sieve 17 is placed in the placement mesh frame 30.

[0022] It enables the recycling of drying hot air, greatly reducing heat waste, reducing energy consumption, making it more energy-efficient and practical.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A servo motor 11 is bolted to one side of the mounting plate frame 5, and a drive shaft 20 is keyed to the output end of the servo motor 11. A drive gear 21 is welded to the drive shaft 20. A drive gear ring 22 is welded to the side wall of the drying rotating cylinder 2, and the drive gear ring 22 meshes with the drive gear 21. A connecting rod frame 3 is symmetrically welded to one end of the circulating air intake pipe 7 in the inner cavity of the drying rotating cylinder 2. Several dispersing rod frames 4 are evenly welded to the connecting rod frame 3, and an anti-clogging scraper 10 is welded to one end of the connecting rod frame 3. An intercepting filter screen 12 is welded to one side of the inner cavity of the drying rotating cylinder 2.

[0024] The dispersing rod 4 rotates relative to the drying rotating drum 2, which disperses the phosphogypsum material, allowing it to come into more full contact with the drying hot air, thus improving the drying and dehydration quality and efficiency. At the same time, the anti-clogging scraper 10 also rotates relative to the intercepting filter 12, which can be used to scrape off the phosphogypsum material that is blocked on the intercepting filter 12, ensuring the continuous normal operation of the device.

[0025] Please refer to Figure 6 A sealed door 32 is connected and installed on one side of the drying oven 15 via a hinge 31, and a handle 33 is welded and fixed on the sealed door 32.

[0026] This allows the user to easily remove the placement frame 30 and placement plate 29 containing the molecular sieve 17 after the device has been working for a period of time, so as to replace the molecular sieve 17 and ensure the moisture absorption and drying effect of the molecular sieve 17.

[0027] Please refer to Figure 1 and Figure 4 A temperature sensor 25 is fixedly installed at one end of the circulating air inlet pipe 7 inside the drying rotating drum 2.

[0028] It monitors the temperature of the drying hot air and feeds the temperature signal back to the control panel, so that the control panel can control the operation of the electric heater 16 and achieve temperature control.

[0029] Please refer to Figure 1 and Figure 2 The inner cavity of the drying rotary drum 2 is connected to a feed hopper 9 welded on one side, and a feed valve 8 is installed on the feed hopper 9.

[0030] It facilitates the import and export of phosphogypsum materials, making it more convenient to use and more practical.

[0031] The control panel is fixedly mounted on the mounting bracket 5, and is electrically connected to the servo motor 11, the circulating air pump 14, the electric heater 16, and the temperature sensor 25. The control circuit of the control panel can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since it is only used and not modified, the control method and circuit connection will not be described in detail. The cross-sectional shape of the recirculation intake pipe 7 and the recirculation exhaust pipe 13 is U-shaped.

[0032] Working Principle: This utility model includes a supporting base plate 1, a drying rotating cylinder 2, and a drying chamber 15. A mounting bracket 5 is symmetrically welded to the top surface of the supporting base plate 1, and a first mounting groove 18 is provided on the mounting bracket 5. First mounting sliding rings 19 are symmetrically welded to the side walls of the drying rotating cylinder 2, and are slidably fitted into the drying chamber 15. A pipe bracket 6 is symmetrically welded to the top surface of the supporting base plate 1, and a circulating air inlet pipe 7 and a circulating air outlet pipe 13 are respectively fixedly installed on the pipe bracket 6. Second mounting grooves 23 are symmetrically provided at both ends of the drying rotating cylinder 2. Second mounting sliding rings 24 are welded to the outer walls of the circulating air inlet pipe 7 and the circulating air outlet pipe 13, and are slidably fitted into the second mounting grooves 15. Inside the chute 23, a hopper 9 is welded to one side of the inner cavity of the drying rotary drum 2, and a discharge valve 8 is installed on the hopper 9. During use, the user can introduce the phosphogypsum material to be dried and dehydrated into the inner cavity of the drying rotary drum 2 through the hopper 9 and close the discharge valve 8. A drying chamber 15 is welded and fixed to five mounting brackets, and several electric heaters 16 are evenly installed on one side of the inner cavity of the drying chamber 15. A circulating air inlet pipe 7 is connected to one side of the inner cavity of the drying chamber 15, and a circulating air outlet pipe 13 is connected to the other side of the inner cavity of the drying chamber 15. During use, the electric heaters 16 heat the air inside the drying chamber 15, and then the circulating air pump 14 installed on the circulating air inlet pipe 7 is started to circulate the heated air through the drying chamber 15. Hot air is pumped into the inner cavity of the drying rotary drum 2 through the circulating air inlet pipe 7 to dry and dehydrate the phosphogypsum material. The dried hot air then flows back to the inner cavity of the drying chamber 15 through the circulating air outlet pipe 13. A placement platform 28 is bolted to the bottom surface of the inner cavity of the drying chamber 15. The placement platform 28 has symmetrically opened pull-out grooves 26, and a pull-out slide plate 27 is slidably embedded in the pull-out grooves 26. A placement plate 29 is welded to the top of the pull-out slide plate 27, and a placement mesh frame 30 is welded to the top surface of the placement plate 29. A molecular sieve 17 is placed in the placement mesh frame 30. The molecular sieve 17 can absorb the moisture in the returned hot air, keeping the hot air containing residual heat in a dry state for reheating, thereby realizing the drying and recycling of the hot air and greatly reducing the cost of drying. This design minimizes heat waste and energy consumption, making it more energy-efficient. A temperature sensor 25 is installed on the circulating air intake pipe 7 to monitor the temperature of the drying hot air and feed the signal back to the control panel. This allows the control panel to control the operation of the electric heater 16, achieving temperature control. A sealed door 32 is connected to one side of the drying chamber 15 via a hinge 31, and a handle 33 is welded to the sealed door 32. After the device has been operating for a period of time, the user can remove the placement frame 30 containing the molecular sieve 17 and the placement plate 29 to replace the molecular sieve 17, ensuring its moisture absorption and drying effect. Additionally, this invention includes a servo motor 11, a drying rotating drum 2, an anti-clogging scraper 10, and an intercepting filter 12.A servo motor 11 is bolted to one side of the mounting bracket 5, and a drive shaft 20 is keyed to the output end of the servo motor 11. A drive gear 21 is welded to the drive shaft 20. A drive gear ring 22 is welded to the side wall of the drying drum 2, and the drive gear ring 22 meshes with the drive gear 21. A connecting rod frame 3 is symmetrically welded to one end of the circulating air inlet pipe 7 located inside the drying drum 2. Several dispersing rod frames 4 are evenly welded to the connecting rod frame 3, and an anti-clogging scraper 10 is welded to one end of the connecting rod frame 3. An intercepting filter screen 12 is welded to one side of the drying drum 2. As described above, when the drying hot air dries the phosphogypsum, the user can start the servo motor 11 through the control panel to drive the drive shaft 20 to rotate, thereby drying... The drying drum 2 rotates around the first mounting groove 18. At this time, the dispersing rod 4 rotates relative to the drying drum 2, thus dispersing the phosphogypsum material to ensure more thorough contact with the drying hot air, improving drying and dehydration quality and efficiency. The intercepting filter 12 prevents the dried phosphogypsum material from being blown into the circulating air outlet 13 and causing blockage. The anti-blocking scraper 10 also rotates relative to the intercepting filter 12, scraping off the phosphogypsum material blocked on the filter 12, ensuring continuous and normal operation of the device. After the batch of phosphogypsum material is fully dried and dehydrated, the servo motor 11 drives the drying drum 2 to rotate until the inlet / outlet hopper 9 faces downwards. Then, the inlet / outlet valve 8 is opened, allowing the dried phosphogypsum to be discharged. It is simple and convenient to use, and highly practical.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot air circulation drying device for processing phosphogypsum, comprising a supporting bottom plate (1), a drying rotating cylinder (2) and a drying box (15), characterized in that, The top surface of the supporting base plate (1) is symmetrically welded with a mounting bracket (5), and a first mounting groove (18) is provided on the mounting bracket (5). The side wall of the drying rotary drum (2) is symmetrically welded with a first mounting ring (19), and the first mounting ring (19) is slidably embedded in the first mounting groove (18). The top surface of the supporting base plate (1) is symmetrically welded with a pipe bracket (6), and a circulating air inlet pipe (7) and a circulating air outlet pipe (13) are respectively fixedly installed on the pipe bracket (6). The two ends of the drying rotary drum (2) are symmetrically provided with second mounting grooves (23). The outer walls of the circulating air inlet pipe (7) and the circulating air outlet pipe (13) are welded with second mounting rings (24), and the second mounting rings (24) are slidably embedded in the second mounting grooves (23). The mounting bracket (5) A drying chamber (15) is welded and fixed, and several electric heaters (16) are evenly installed on one side of the inner cavity of the drying chamber (15). One end of the circulating air inlet pipe (7) is connected to one side of the inner cavity of the drying chamber (15), and one end of the circulating air outlet pipe (13) is connected to the other side of the inner cavity of the drying chamber (15). A circulating air pump (14) is installed on the circulating air inlet pipe (7). A placement platform (28) is bolted and fixed on the bottom surface of the inner cavity of the drying chamber. A pull-out slide groove (26) is symmetrically opened on the placement platform (28), and a pull-out slide plate (27) is slidably embedded in the pull-out slide groove (26). A placement plate (29) is welded and installed on the top of the pull-out slide plate (27), and a placement mesh frame (30) is welded on the top surface of the placement plate (29). A molecular sieve (17) is placed in the placement mesh frame (30).

2. The hot air circulation drying device for processing ardealite according to claim 1, characterized in that, A servo motor (11) is bolted to one side of the mounting plate (5), and a drive shaft (20) is keyed to the output end of the servo motor (11). A drive gear (21) is welded to the drive shaft (20). A drive gear ring (22) is welded to the side wall of the drying rotating cylinder (2), and the drive gear ring (22) meshes with the drive gear (21). A connecting rod frame (3) is symmetrically welded to one end of the circulating air intake pipe (7) in the inner cavity of the drying rotating cylinder (2). Several dispersing rod frames (4) are evenly welded to the connecting rod frame (3), and an anti-clogging scraper (10) is welded to one end of the connecting rod frame (3). An intercepting filter screen (12) is welded to one side of the inner cavity of the drying rotating cylinder (2).

3. The hot air circulation drying device for processing phosphogypsum according to claim 1, characterized in that, The drying oven (15) has a sealed door (32) connected and installed on one side by a hinge (31), and a handle (33) is welded and fixed on the sealed door (32).

4. The hot air circulation drying device for processing phosphogypsum according to claim 1, characterized in that, A temperature sensor (25) is fixedly installed at one end of the inner cavity of the drying rotary drum (2) in the circulating air inlet pipe (7).

5. The hot air circulation drying device for processing phosphogypsum according to claim 1, characterized in that, The inner cavity of the drying rotary drum (2) is connected to a feed hopper (9) welded on one side, and a feed valve (8) is installed on the feed hopper (9).

6. The hot air circulation drying device for processing phosphogypsum according to claim 1, characterized in that The control panel is fixedly installed on the mounting plate (5), and the control panel is electrically connected to the servo motor (11), the circulating air pump (14), the electric heater (16), and the temperature sensor (25).

7. The hot air circulation drying device for processing phosphogypsum according to claim 1, characterized in that The cross section shape of the circulation inlet pipe (7) and the circulation outlet pipe (13) is U-shaped.

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