Hollow blade sludge drying device

Abstract

The utility model relates to the technical field of sludge drying, and discloses a hollow blade sludge drying device which comprises a mounting rack, a drying box is fixedly mounted on the upper surface of the mounting rack, a hollow rotating shaft is rotatably mounted in the drying box, a driving mechanism is fixedly mounted at the end of the mounting rack, and the driving mechanism drives the hollow rotating shaft to rotate. A plurality of hollow paddles are fixedly installed on the surface of the hollow rotating shaft, and a rotating connector is fixedly installed at the end of the drying box. According to the device, the telescopic and movable flow dividing partition plate is arranged, the flow dividing partition plate extends into the drying box from the flow dividing box to stop transverse flowing of internal materials, so that the materials are fully stirred by the hollow blades, the heat conduction drying time is prolonged, and the flow dividing partition plate has the effect of scraping away objects adhering to the surfaces of the hollow blades; the number of obstacles in the drying box is reduced, the hollow blades are used for pushing materials to flow, and the effect of rapidly discharging the materials is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge drying, in particular to a hollow blade sludge drying device. Background Art

[0002] The hollow paddle dryer is a horizontal stirring drying device based on heat conduction. Most of the existing ones are double-axis or four-axis structures. For example, the patent document with the prior art announcement number CN209567602U discloses a hollow paddle dryer, including a feed bin and a conveying bin, wherein a conveying shaft is arranged in the conveying bin, a rake is arranged at the front end of the conveying shaft, and a conveying blade is arranged at the rear end of the conveying shaft; the rake includes a rotating shaft arranged on the conveying shaft, and a scraper arranged on the rotating shaft, and a small gap is arranged between the scraper and the inner wall of the conveying bin when the scraper rotates. The utility model provides a hollow paddle dryer with a reasonable structure that can smoothly convey materials.

[0003] In actual practical use, the reason that affects the material flow rate inside this hollow paddle dryer is mainly determined by the setting of the paddles. The paddles rotate and use their wedge-shaped surfaces to push the material flow. The spacing between adjacent paddles is too small (or the paddles are too dense). The distance that the paddles push the material flow after the main shaft rotates one circle is very limited. If the spacing between the paddles is increased, it is likely to cause the material to adhere to the paddles and lose the stirring effect. Based on this, the existing hollow paddle drying device has the problem of slow material discharge speed, which needs further improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a hollow blade sludge drying device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hollow paddle sludge drying device, comprising a mounting frame, a drying box is fixedly mounted on the upper surface of the mounting frame, a hollow rotating shaft is rotatably mounted inside the drying box, a driving mechanism is fixedly mounted on the end of the mounting frame, the driving mechanism drives the hollow rotating shaft to rotate, a plurality of hollow paddles are fixedly mounted on the surface of the hollow rotating shaft, a rotating joint is fixedly mounted on the end of the drying box, the hollow rotating shaft is rotatably connected to the rotating joint, and the rotating joint is connected to the inner cavity of the hollow rotating shaft and the hollow paddle.

[0006] A diverter box is fixedly installed on the side of the drying box, and a plurality of diverter baffles are slidably installed inside the diverter box. A telescopic cylinder is fixedly installed on the surface of the diverter box. The telescopic cylinder pushes the diverter baffles to reciprocate and extend, so that the diverter baffles can extend into the interior of the drying box, thereby reducing the number of obstacles inside the drying box, and utilizing hollow blades to promote the flow of materials to achieve the effect of rapid discharge of materials.

[0007] Preferably, a feeding pipe and a dehumidification pipe are fixedly installed on the upper side of the drying box, a discharge valve is fixedly installed on one end of the drying box away from the driving mechanism, a heat conduction pipe is buried in the shell of the drying box, the heat conduction pipe is arranged in a spiral shape, an input joint and an output joint are fixedly installed on the surface of the drying box, the input joint and the output joint are respectively connected to the two ends of the heat conduction pipe, and a heat conduction medium is input into the heat conduction pipe to achieve the effect of heating the shell of the drying box.

[0008] Preferably, the hollow blades are fan-shaped, the side surfaces of the hollow blades are wedge-shaped, and a plurality of hollow blades are equidistantly fixed around the hollow shaft along the path of the spiral line. The inner cavity of the drying box is cylindrical, and the outer edges of the hollow blades are in sliding contact with the inner wall of the drying box, thereby reducing the gaps around the hollow blades so as to stir the internal materials.

[0009] Preferably, the rotating joint includes a fixed sleeve and a rotating disk, the rotating disk is rotatably installed in the fixed sleeve, the ends of the fixed sleeve are respectively fixedly installed with the input pipe and the return pipe, the end faces of the rotating disk are respectively provided with annular grooves and center holes, the fixed sleeve is fixedly connected to the end of the drying box, and the rotating disk is fixedly connected to the end of the hollow rotating shaft.

[0010] A plurality of first flow channel holes and one second flow channel hole are provided inside the hollow rotating shaft, and both the first flow channel holes and the second flow channel holes are connected to the inner cavity of the hollow blade. When the rotating disk is fixedly connected to the end of the hollow rotating shaft, the annular groove is aligned and connected to the first flow channel hole, and the center hole is aligned and connected to the second flow channel hole. The heat transfer medium enters from the input pipe, and then enters the first flow channel hole, the hollow blade and the second flow channel hole to heat the hollow rotating shaft and the hollow blade. Finally, the heat transfer medium is discharged from the return pipe to realize circulating heating.

[0011] Preferably, the driving mechanism includes a servo motor and a gearbox. The servo motor drives the gearbox's shaft to rotate via a belt. A sprocket is fixedly installed at one end of the hollow shaft away from the rotating joint. The gearbox drives the sprocket at the end of the hollow shaft to rotate via a chain, thereby realizing variable speed driving of the hollow shaft to rotate forward and reverse.

[0012] Preferably, there are two diverter boxes, which are symmetrically arranged on both sides of the drying box. The diverter baffles in the two diverter boxes can extend into the drying box, and the diverter baffles can extend into the gaps between adjacent hollow blades. The diverter baffles are fixed, while the hollow blades rotate. The relative movement of the two causes the mutual squeezing of the sludge, so that the diverter baffles have the function of scraping off the adhesion on the surface of the hollow blades.

[0013] The utility model provides a hollow blade sludge drying device, which has the following beneficial effects:

[0014] 1. The hollow paddle sludge drying device is provided with a retractable and movable diverter baffle, which extends from the diverter box into the drying box to block the lateral flow of the internal material, so that the hollow paddle can fully stir the material and extend the heat conduction drying time. The diverter baffle has the function of scraping off the adherent material on the surface of the hollow paddle. When the diverter baffle is retracted into the diverter box, the number of obstacles inside the drying box is reduced, and the hollow paddle is used to promote the flow of materials. This design can not only effectively prevent the material from adhering to the paddle, but also achieve the effect of rapid material discharge, greatly improving production efficiency.

[0015] 2. The hollow paddle sludge drying device is provided with a heat conducting pipe, a hollow rotating shaft and a hollow paddle in the shell of the drying box, and a heat conducting medium can be injected into the heat conducting pipe, the hollow rotating shaft and the hollow paddle respectively to provide heat energy for the drying device, thereby expanding the contact area for heat transfer to the sludge and improving the drying efficiency. The hollow paddles are arranged in a spiral shape around the hollow rotating shaft, and the outer edges of the hollow paddles are in sliding contact with the inner wall of the drying box, thereby reducing the gap between the hollow paddles and the inner wall of the drying box, and the materials on the inner wall of the drying box can be scraped off well, so that the device can discharge materials more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model (partial section one);

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model (partial section 2);

[0019] Figure 4 It is a schematic diagram of the side section structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the hollow shaft of the utility model;

[0021] Figure 6 It is a schematic diagram of the top-sectional structure of the rotary joint of the utility model.

[0022] In the figure: 1 mounting frame, 2 drying box, 3 hollow rotating shaft, 4 hollow blade, 5 rotating joint, 6 diversion box, 7 diversion baffle, 8 telescopic cylinder, 9 feeding pipe, 10 dehumidification pipe, 11 discharge valve, 12 heat transfer pipe, 13 fixed sleeve, 14 rotating disk, 15 input pipe, 16 return pipe, 17 annular groove, 18 center hole, 19 first flow channel hole, 20 second flow channel hole, 21 servo motor, 22 gearbox. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-6 The utility model provides a technical solution: a hollow paddle sludge drying device, comprising a mounting frame 1, a drying box 2 is fixedly mounted on the upper surface of the mounting frame 1, a hollow rotating shaft 3 is rotatably mounted inside the drying box 2, a driving mechanism is fixedly mounted on the end of the mounting frame 1, the driving mechanism drives the hollow rotating shaft 3 to rotate, a feeding pipe 9 and a dehumidification pipe 10 are respectively fixedly mounted on the upper side of the drying box 2, and a discharge valve 11 is fixedly mounted on the end of the drying box 2 away from the driving mechanism.

[0025] The driving mechanism includes a servo motor 21 and a gearbox 22. The servo motor 21 drives the shaft of the gearbox 22 to rotate through a belt. A sprocket is fixedly installed at one end of the hollow shaft 3 away from the rotating joint 5. The gearbox 22 drives the sprocket at the end of the hollow shaft 3 to rotate through a chain.

[0026] A heat pipe 12 is embedded in the shell of the drying box 2 and arranged in a spiral shape. An input connector and an output connector are fixedly installed on the surface of the drying box 2 and are connected to both ends of the heat pipe 12 respectively.

[0027] A plurality of hollow blades 4 are fixedly mounted on the surface of the hollow rotating shaft 3. The hollow blades 4 are in a fan-shaped structure, and the side surfaces of the hollow blades 4 are wedge-shaped surfaces. The plurality of hollow blades 4 are equidistantly fixed around the hollow rotating shaft 3 along the path of the spiral line. The inner cavity of the drying box 2 is cylindrical, and the outer edges of the hollow blades 4 are in sliding contact with the inner wall of the drying box 2, thereby reducing the gap between the hollow blades 4 and the inner wall of the drying box 2, and the material on the inner wall of the drying box 2 can be scraped off well, making the discharge of the device smoother.

[0028] A rotary joint 5 is fixedly mounted on the end of the drying box 2 , the hollow rotating shaft 3 is rotatably connected to the rotary joint 5 , and the rotary joint 5 is communicated with the inner cavity of the hollow rotating shaft 3 and the hollow blade 4 .

[0029] Specifically, Figure 6 As shown, the rotating joint 5 includes a fixed sleeve 13 and a rotating disk 14. The rotating disk 14 is rotatably installed in the fixed sleeve 13. The ends of the fixed sleeve 13 are respectively fixedly installed by the input pipe 15 and the return pipe 16. The end faces of the rotating disk 14 are respectively provided with annular grooves 17 and a center hole 18. The fixed sleeve 13 is fixedly connected to the end of the drying box 2, and the rotating disk 14 is fixedly connected to the end of the hollow rotating shaft 3.

[0030] The hollow shaft 3 is provided with a plurality of first flow channel holes 19 and a second flow channel hole 20, and the first flow channel hole 19 and the second flow channel hole 20 are both connected to the inner cavity of the hollow blade 4, that is, the hollow blade 4 is connected to the first flow channel hole 19 through the hole on the surface of the hollow shaft 3, and the hollow blade 4 is connected to the second flow channel hole 20 through an independent pipeline. When the rotating disk 14 is fixedly connected to the end of the hollow shaft 3, the annular groove 17 is aligned and connected to the first flow channel hole 19, and the center hole 18 is aligned and connected to the second flow channel hole 20. Figure 5 , 6 The heat transfer medium enters from the input pipe 15, then enters the first flow channel hole 19, the hollow blade 4 and the second flow channel hole 20, heats the hollow shaft 3 and the hollow blade 4, and finally the heat transfer medium is discharged from the return pipe 16 to realize circulating heating.

[0031] A heat conducting pipe 12, a hollow rotating shaft 3 and a hollow paddle 4 are arranged in the shell of the drying box 2. Heat conducting medium can be injected into the heat conducting pipe 12, the hollow rotating shaft 3 and the hollow paddle 4 respectively. The heat conducting medium can be selected from high-temperature steam or heat conducting oil. The heat conducting medium provides heat energy for the drying device. When the hollow paddle 4 rotates, the internal sludge is stirred. During the tumbling process, the sludge contacts the outer surfaces of the hollow rotating shaft 3 and the hollow paddle 4, as well as the inner wall of the drying box 2, thereby expanding the contact area for heat transfer to the sludge and improving the drying efficiency.

[0032] A diverter box 6 is fixedly installed on the side of the drying box 2, and a plurality of diverter baffles 7 are slidably installed inside the diverter box 6. A telescopic cylinder 8 is fixedly installed on the surface of the diverter box 6. The telescopic cylinder 8 pushes the diverter baffles 7 to reciprocate and extend so that the diverter baffles 7 can extend into the interior of the drying box 2. The side of the diverter baffle 7 close to the hollow rotating shaft 3 is in an arc structure and is consistent with the arc surface of the inner wall of the drying box 2. When the diverter baffle 7 is retracted into the diverter box 6, the arc surface of the diverter baffle 7 smoothly transitions to the inner wall of the drying box 2.

[0033] In the present embodiment, there are two diverter boxes 6, which are symmetrically arranged on both sides of the drying box 2. The diverter baffles 7 in the two diverter boxes 6 can be extended into the drying box 2, and the diverter baffles 7 can be extended into the gap between adjacent hollow blades 4. The diverter baffles 7 have the function of blocking the lateral flow of internal materials, avoiding the accumulation of materials at one end of the drying box 2, making the materials evenly dispersed, and achieving better heat drying effect. The diverter baffles 7 are fixed, while the hollow blades 4 rotate. The relative movement of the two causes the mutual extrusion of the sludge, so that the diverter baffles 7 have the function of scraping off the adhesion on the surface of the hollow blades 4.

[0034] Working principle: During use, heat transfer medium is input into the heat transfer pipe 12 and the input pipe 15, and the heat transfer medium can circulate into the heat transfer pipe 12, the hollow shaft 3, and the hollow paddle 4 for heat conduction heating. The diverter baffle 7 is pushed into the interior of the drying box 2 by the telescopic cylinder 8, and the sludge is input into the drying box 2 through the feeding pipe 9. The driving mechanism drives the hollow shaft 3 to rotate forward or reversely, and the hollow paddle 4 stirs the sludge. The sludge is heated through heat conduction, and the water vapor generated by the heated sludge is discharged from the dehumidification pipe 10 and then transported to the dust removal system. When discharging, the diverter baffle 7 is retracted into the diverter box 6, and the hollow paddle 4 is used to promote the flow of materials to be discharged from the discharge valve 11.

[0035] The hollow paddle sludge drying device is provided with a retractable and movable diverter baffle 7, which extends from the diverter box 6 into the drying box 2 to block the lateral flow of the internal material so that the hollow paddle 4 can fully stir the material and extend the heat conduction drying time. The diverter baffle 7 has the function of scraping off the adhesion on the surface of the hollow paddle 4. When the diverter baffle 7 is retracted into the diverter box 6, the number of obstacles inside the drying box 2 is reduced, and the hollow paddle 4 is used to promote the flow of materials. This design can not only effectively prevent the material from adhering to the paddle, but also achieve the effect of quickly discharging the material, thereby greatly improving the production efficiency.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hollow blade sludge drying device, comprising a mounting frame (1), characterized in that: A drying box (2) is fixedly mounted on the upper surface of the mounting frame (1), a hollow rotating shaft (3) is rotatably mounted inside the drying box (2), a driving mechanism is fixedly mounted on the end of the mounting frame (1), the driving mechanism drives the hollow rotating shaft (3) to rotate, a plurality of hollow blades (4) are fixedly mounted on the surface of the hollow rotating shaft (3), a rotating joint (5) is fixedly mounted on the end of the drying box (2), the hollow rotating shaft (3) is rotatably connected to the rotating joint (5), and the rotating joint (5) is in communication with the inner cavities of the hollow rotating shaft (3) and the hollow blades (4); A diverter box (6) is fixedly mounted on the side of the drying box (2), a plurality of diverter baffles (7) are slidably mounted inside the diverter box (6), and a telescopic cylinder (8) is fixedly mounted on the surface of the diverter box (6), the telescopic cylinder (8) pushes the diverter baffles (7) to reciprocate and telescope, so that the diverter baffles (7) can extend into the interior of the drying box (2).

2. A hollow blade sludge drying device according to claim 1, characterized in that: A feeding pipe (9) and a moisture discharge pipe (10) are respectively fixedly mounted on the upper side of the drying box (2), and a discharge valve (11) is fixedly mounted on one end of the drying box (2) away from the driving mechanism.

3. A hollow blade sludge drying device according to claim 2, characterized in that: A heat conducting pipe (12) is embedded in the shell of the drying box (2), the heat conducting pipe (12) is arranged in a spiral shape, and an input joint and an output joint are fixedly mounted on the surface of the drying box (2), the input joint and the output joint are respectively connected to two ends of the heat conducting pipe (12).

4. A hollow blade sludge drying device according to claim 3, characterized in that: The hollow blade (4) is in a fan-shaped structure, the side surface of the hollow blade (4) is a wedge-shaped surface, a plurality of hollow blades (4) are fixed at equal intervals around the hollow rotating shaft (3) according to the path of the spiral line, the inner cavity of the drying box (2) is cylindrical, and the outer edge of the hollow blade (4) is in sliding contact with the inner wall of the drying box (2).

5. The hollow blade sludge drying device according to claim 4, characterized in that: The rotary joint (5) comprises a fixed sleeve (13) and a rotating disk (14). The rotating disk (14) is rotatably mounted in the fixed sleeve (13). The ends of the fixed sleeve (13) are respectively fixedly mounted with an input pipe (15) and a return pipe (16). The end surfaces of the rotating disk (14) are respectively provided with an annular groove (17) and a center hole (18). The fixed sleeve (13) is fixedly connected to the end of the drying box (2), and the rotating disk (14) is fixedly connected to the end of the hollow rotating shaft (3).

6. The hollow blade sludge drying device according to claim 5, characterized in that: The hollow rotating shaft (3) is provided with a plurality of first flow channel holes (19) and a second flow channel hole (20), and both the first flow channel holes (19) and the second flow channel hole (20) are connected to the inner cavity of the hollow blade (4). When the rotating disk (14) is fixedly connected to the end of the hollow rotating shaft (3), the annular groove (17) is aligned and connected to the first flow channel hole (19), and the central hole (18) is aligned and connected to the second flow channel hole (20).

7. A hollow blade sludge drying device according to any one of claims 1 to 6, characterized in that: There are two diverter boxes (6), which are symmetrically arranged on both sides of the drying box (2). The diverter baffles (7) in the two diverter boxes (6) can extend into the drying box (2), and the diverter baffles (7) can extend into the gap between adjacent hollow blades (4).

8. The hollow blade sludge drying device according to claim 7, characterized in that: The driving mechanism comprises a servo motor (21) and a gearbox (22); the servo motor (21) drives the rotating shaft of the gearbox (22) to rotate via a belt; a sprocket is fixedly mounted on one end of the hollow rotating shaft (3) away from the rotating joint (5); and the gearbox (22) drives the sprocket at the end of the hollow rotating shaft (3) to rotate via a chain.

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