Drying system for sewage treatment

Abstract

The invention relates to the technical field of sewage sludge treatment, and discloses a drying system for sewage treatment, the drying system comprises a base and a support, a protective frame is fixed on the surface of the support, an exhaust fan is fixed in the protective frame, an air guide pipe is fixed on the surface of the protective frame, and a supporting frame is fixed at one end, away from the support, of the base. The drying system for sewage treatment comprises a support frame, a feeding pipe is fixed in the support frame, a feeding assembly for conveying sludge is arranged in the feeding pipe, the feeding assembly comprises a first driving motor, and the first driving motor is clamped in the feeding pipe. According to the sludge drying device, hot air collected in the protection frame is conveyed into the closed pipe through the air guide pipe, then the hot air enters the feeding spiral frame, when the feeding spiral frame pushes sludge, the hot air recovered by the connecting rod can pre-dry the sludge through the feeding spiral frame, and then the sludge drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage sludge treatment, in particular to a drying system for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of treating various types of sewage, such as domestic sewage and industrial wastewater, so that its water quality meets the discharge standards or reuse requirements, thereby reducing pollution to the water environment and protecting water resources. It is an important part of environmental protection and sustainable use of water resources. During the sewage treatment process, sludge will continue to accumulate. In order to achieve sludge reduction, stabilization, harmlessness and resource utilization, the sludge is usually treated and recycled for reuse, and the sludge dryer is the core equipment for sewage sludge treatment.

[0003] When the sludge accumulated in the sewage is transported to the sludge dryer, the air around the heat source is pumped into the dryer through the exhaust system, and then comes into contact with the sludge turned over in the dryer and is heated, making the wet sludge dry. The sludge dryers currently on the market, when drying the sludge, due to the action of the exhaust system, make the hot air circulate in the drum once and then be discharged to the outside, which causes the external air to overheat, affects the working environment, and wastes the heat energy of the discharged hot air. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a drying system for sewage treatment, which solves the problems raised in the above background technology.

[0005] The present invention provides the following technical solution: a drying system for sewage treatment, comprising a base and a bracket, a protective frame fixed to the surface of the bracket, an exhaust fan fixed inside the protective frame, an air guide pipe fixed to the surface of the protective frame, a support frame fixed to one end of the base away from the bracket, a feed pipe fixed inside the support frame, and a feed assembly for conveying sludge provided inside the feed pipe; The feeding assembly includes a first driving motor, which is clamped inside the feeding tube, a closed tube is fixed to one end of the first driving motor close to the output shaft, a feeding screw rack is rotatably connected to the inside of the closed tube, and the feeding screw rack is located inside the feeding tube, a connecting rod is provided inside the feeding screw rack, an air groove is fixed to the output shaft of the first driving motor, the air groove is located inside the connecting rod, an end of the air groove away from the first driving motor is fixed to an end of the connecting rod away from the first driving motor, and an end of the air guide tube away from the bracket is fixed to and communicated with the closed tube; An extension component for extending the sludge travel distance is provided on a side of the support frame away from the heat source system.

[0006] Optionally, a bracket is fixed on the top of the base, a rotating drum is connected to the inside of the bracket, a reduction motor is fixed on the top of the bracket, a gear plate is fixed on the end of the rotating drum close to the bracket, the gear plate is engaged with the gear of the reduction motor, and a spiral plate is fixed on the inner wall of the rotating drum.

[0007] Optionally, limit pins are fixed on both sides of the bracket, and the limit pins are fixed to the top of the base through a dustproof frame.

[0008] Optionally, the rotating drum and the bracket are connected to each other, and the bottom of the bracket is open.

[0009] Optionally, a heat source system is fixed on the surface of the support frame, a resistance wire is fixed inside the heat source system, a feeding funnel is fixed on the top of the feeding pipe, the heat source system is connected to the support frame, and the feeding funnel is connected to the feeding pipe.

[0010] Optionally, the extension assembly includes an extension tube, which is fixed to the support frame, a mounting frame is fixed to the inner wall of the extension tube, a second drive motor is fixed inside the mounting frame, a connecting shaft is fixed to the output shaft of the second drive motor, impellers are fixed to the surfaces of both ends of the connecting shaft, and an eccentric wheel is fixed to the surface of the connecting shaft located in the middle of the two impellers.

[0011] Optionally, an extended feed pipe is fixed to the end of the feed pipe away from the first drive motor, a ventilation cavity is opened inside the extended feed pipe, a limiting frame is fixed to the bottom of the extended feed pipe, the ventilation cavity is connected to the limiting frame, an air inlet is opened at the bottom of the limiting frame, and the inner circle of the extended feed pipe is inclined near one end of the feed pipe.

[0012] Optionally, the interior of the limit frame is slidably connected to a top plate, the surface of the top plate is provided with air holes, a top pin is fixed to the top of the top plate, the top pin is slidably connected to the extended feed tube, and elastic ropes are fixed to the bottom of both ends of the top plate, and the elastic ropes are fixed to the limit frame.

[0013] Optionally, the air duct is provided with two sections, and the two sections of the air duct are connected through a bellows.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This drying system for sewage treatment transmits the hot air collected in the protective frame into the interior of the closed tube through the air duct, and then allows the hot air to enter the interior of the feeding spiral frame. When the feeding spiral frame is pushing the sludge, the hot air recovered by the connecting rod can pre-dry the sludge through the feeding spiral frame, thereby improving the efficiency of sludge drying.

[0015] 2. The drying system for sewage treatment drives the impeller and eccentric wheel to rotate through the second drive motor, so that the hot air around the resistance wire can flow to the exhaust fan more quickly, making the temperature at both ends of the drum more balanced, and making the drum dry the sludge more uniform. At the same time, the eccentric wheel can knock the top plate, so that the top plate drives the top needle to chisel the sludge in the extended feed pipe, so that the crushed sludge can be dried more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a side view of the structure of the present invention; Figure 3 This is a diagram showing the opening and closing structure of the bracket of the present invention; Figure 4 This is an internal view of the structure of the support frame and extension tube of the present invention; Figure 5 It is a schematic structural diagram of the feeding pipe and the extended feeding pipe of the present invention; Figure 6 is a cross-sectional view of the structure of the extension assembly of the present invention; Figure 7 Schematic diagram of the structure of the ejector pin of the present invention; Figure 8 This is a structural sectional view of the feeding spiral rack of the present invention.

[0017] In the figure: 1. Base; 11. Bracket; 12. Rotating drum; 13. Reducer motor; 14. Gear plate; 15. Spiral plate; 2. Bracket; 21. Limit pin; 22. Dustproof frame; 23. Protective frame; 24. Exhaust fan; 25. Air duct; 251. Bellows; 3. Support frame; 31. Heat source system; 32. Resistance wire; 33. Feeding pipe; 34. Feeding funnel; 4. First driving motor; 41. Closing pipe; 42. Feeding spiral frame; 43. Connecting rod; 44. Air trough; 5. Extension pipe; 51. Mounting frame; 52. Second driving motor; 53. Connecting shaft; 54. Impeller; 55. Eccentric wheel; 6. Extended feeding pipe; 61. Ventilation chamber; 62. Limiting frame; 63. Air inlet; 7. Top plate; 71. Ejector pin; 72. Elastic rope. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1

[0020] See also Figure 1-8 A drying system for sewage treatment includes a base 1 and a bracket 2. A protective frame 23 is fixed to the surface of the bracket 2. An exhaust fan 24 is fixed inside the protective frame 23. An air guide pipe 25 is fixed to the surface of the protective frame 23. A support frame 3 is fixed to the end of the base 1 away from the bracket 2. A feeding pipe 33 is fixed inside the support frame 3. A feeding component for conveying sludge is provided inside the feeding pipe 33. The feeding assembly includes a first drive motor 4, which is clamped inside the feeding tube 33. A closed tube 41 is fixed to one end of the first drive motor 4 close to the output shaft. A feeding screw rack 42 is rotatably connected to the inside of the closed tube 41, and the feeding screw rack 42 is located inside the feeding tube 33. A connecting rod 43 is provided inside the feeding screw rack 42. An air groove 44 is fixed to the output shaft of the first drive motor 4. The air groove 44 is located inside the connecting rod 43. An end of the air groove 44 away from the first drive motor 4 is fixed to an end of the connecting rod 43 away from the first drive motor 4. An end of the air guide tube 25 away from the bracket 2 is fixed to the closed tube 41 and is connected to the closed tube 41. An extension component for extending the sludge travel is provided on the side of the support frame 3 away from the heat source system 31. A bracket 11 is fixed to the top of the base 1. A rotating drum 12 is rotatably connected to the inside of the bracket 11. A reduction motor 13 is fixed to the top of the bracket 11. A gear plate 14 is fixed to the end of the rotating drum 12 close to the bracket 2. The gear plate 14 meshes with the gear of the reduction motor 13. A spiral plate 15 is fixed to the inner wall of the rotating drum 12. Limit pins 21 are fixed on both sides of the bracket 2, and the limit pins 21 are fixed to the top of the base 1 through the dustproof frame 22. The rotating drum 12 and the bracket 2 are connected to each other, and the bottom of the bracket 2 is open. A heat source system 31 is fixed to the surface of the support frame 3, and a resistance wire 32 is fixed inside the heat source system 31. A feeding funnel 34 is fixed to the top of the feeding pipe 33. The heat source system 31 is connected to the support frame 3, and the feeding funnel 34 is connected to the feeding pipe 33. The air guide pipe 25 has two sections, and the two sections of the air guide pipe 25 are connected through a bellows 251; During the specific operation, the support frame 3 is first pushed, and the extension component is driven to move by the support frame 3, so that the support frame 3 is connected to the drum 12 through the extension component. Then, the resistance wire 32 and the exhaust fan 24 are started by the controller, so that the resistance wire 32 heats the air inside the support frame 3. At the same time, under the action of the exhaust fan 24, the heated air is pumped into the interior of the protective frame 23. During the hot air circulation process, the hot air passes through the drum 12, and then heat is transferred to the inner wall of the drum 12 and the air inside the drum 12, so that the inner wall of the drum 12, the spiral plate 15 and the air inside the drum 12 are preheated; During the preheating process, the hot air entering the protective frame 23 enters the interior of the top of the protective frame 23 under the action of the rising hot air, and then enters the interior of the air guide pipe 25. The hot air then enters the interior of the closed tube 41 through the air guide pipe 25, and the hot air in the closed tube 41 enters the interior of the connecting rod 43 through the closed tube 41, so that the interior of the connecting rod 43 is filled with hot air, thereby heating the feeding spiral frame 42. After the preheating is completed, the sludge is transported into the feed hopper 34 through other feeding equipment, and then the reduction motor 13 is started, and the gear plate 14 is driven to rotate by the reduction motor 13, and then the rotating drum 12 is driven to rotate by the gear plate 14, and the sludge enters the interior of the feeding pipe 33 through the feed hopper 34, and then the sludge contacts the feeding screw frame 42, and then the first driving motor 4 is started by the controller, so that the first driving motor 4 drives the air groove 44 to rotate, and then the air groove 44 drives the feeding screw frame 42 to rotate inside the closed tube 41, and the feeding screw frame 42 pushes the sludge toward the rotating drum 12 during the rotation process; During the sludge pushing process, the sludge is in full contact with the surface of the feeding screw 42, and then the hot air in the connecting rod 43 passes through the feeding screw 42 to preheat the sludge, so that part of the moisture in the sludge can be dried in advance during the process of being transported in the feeding pipe 33, thereby improving the efficiency of sludge drying; After the sludge is discharged from the inside of the feed pipe 33, the sludge falls into the inside of the drum 12. At this time, the drum 12 drives the spiral plate 15 to rotate. After the sludge enters the inside of the drum 12, under the action of the spiral plate 15, the hot air in the spiral plate 15 and the drum 12 dries the flipped sludge until the spiral plate 15 pushes the sludge into the inside of the bracket 2 and falls to the top of the base 1 through the bracket 2. At this time, the sludge is dried and discharged.

[0021] It should be noted that all devices of the present invention are controlled by a controller, and the reason why the present invention preheats the drum 12 is to prevent the sludge from passing through the drum 12 and entering the interior of the bracket 2 when the drum 12 and the air inside the drum 12 have not yet reached the temperature required for drying the sludge. The hot air is transported by the air duct 25 not only during the preheating process, but also during the subsequent drying process. The hot air in the drum 12 still enters the interior of the protective frame 23 under the action of the exhaust fan 24, and is continuously replenished into the interior of the feeding screw frame 42 through the air duct 25. At the same time, the feeding screw frame 42 is provided with an exhaust hole at the end away from the first driving motor 4, so that the hot air can be continuously replenished into the interior of the feeding screw frame 42, and the hot air discharged from the feeding screw frame 42 can enter the interior of the drum 12 again and circulate and heat the sludge in the drum 12. At the same time, the existence of the exhaust hole enables the exhaust fan 24 to exhaust the feeding screw frame 42, so that the feeding screw frame 42 is in a negative pressure state, and then the air duct 25 is in a negative pressure state, thereby allowing the hot air to be stably transported to the interior of the air duct 25. Compared with traditional sludge dryers, the present invention is able to recycle the hot air exhausted from the drum 12, thereby reducing energy consumption while improving drying efficiency. When drying is completed and cleaning and maintenance is required, the dust frame 22 away from the side of the bellows 251 can be pulled out, so that the dust frame 22 close to the side of the bellows 251 continues to limit the limit pin 21. At this time, the bracket 2 can be rotated, and the bellows 251 is flexible, so that the air guide pipe 25 can be flipped. At the same time, the bellows 251 can also be disassembled. When the bracket 2 needs to be completely removed, the two dust frames 22 are pulled out, and the bellows 251 is taken out to release the connection between the two sections of the air guide pipe 25, and then the bracket 2 can be removed.

[0022] Example 2

[0023] The extension assembly includes an extension tube 5, which is fixed to the support frame 3. A mounting bracket 51 is fixed to the inner wall of the extension tube 5. A second drive motor 52 is fixed inside the mounting bracket 51. A connecting shaft 53 is fixed to the output shaft of the second drive motor 52. Impellers 54 are fixed to the surfaces of both ends of the connecting shaft 53. An eccentric wheel 55 is fixed to the surface of the connecting shaft 53 located in the middle of the two impellers 54. Specifically, based on the first embodiment, after the resistance wire 32 and the exhaust fan 24 are started, since the exhaust fan 24 is at a certain distance from the resistance wire 32, during the exhaust process of the exhaust fan 24, that is, during the process of the hot air around the resistance wire 32 circulating in the drum 12, the hot air comes into contact with the normal temperature air in the drum 12, and its temperature gradually decreases. That is, the closer the hot air is to the exhaust fan 24, the lower its temperature is. Therefore, during the exhaust process of the exhaust fan 24, the second drive motor 52 is started by the controller, so that the second drive motor 52 drives the connecting shaft 53 to rotate, and the connecting shaft 53 drives the impeller 54 to rotate, and then the impeller 54 plays the role of relay exhaust, thereby accelerating the speed of the hot air around the resistance wire 32 flowing toward the exhaust fan 24, so that the hot air can quickly reach the exhaust fan 24, and then the temperature at the head and tail ends of the drum 12 is more balanced, thereby improving the uniformity of the hot air in the drum 12 in drying the sludge.

[0024] Example 3

[0025] An extension feed pipe 6 is fixed to the end of the feed pipe 33 away from the first drive motor 4, a ventilation cavity 61 is provided inside the extension feed pipe 6, a limiting frame 62 is fixed to the bottom of the extension feed pipe 6, the ventilation cavity 61 is communicated with the limiting frame 62, an air inlet 63 is provided at the bottom of the limiting frame 62, the inner circle of the extension feed pipe 6 is inclined near the end of the feed pipe 33, the limiting frame 62 is slidably connected to the top plate 7, the surface of the top plate 7 is provided with an ejector pin 71, the ejector pin 71 is slidably connected to the extension feed pipe 6, elastic ropes 72 are fixed to the bottom of both ends of the top plate 7, and the elastic ropes 72 are fixed to the limiting frame 62; Specifically, on the basis of the first and second embodiments, when the feeding screw 42 pushes the sludge, the sludge enters the interior of the extended feeding pipe 6 through the feeding pipe 33, and the extended feeding pipe 6 is tilted near one end of the feeding pipe 33, which reduces the flow rate, thereby reducing the conveying speed of the sludge in the extended feeding pipe 6, thereby reducing the speed of subsequent sludge replenishment, and increasing the contact time between the replenished sludge and the feeding screw 42, thereby extending the time for the feeding screw 42 to dry the sludge, thereby improving the efficiency of the feeding screw 42 in preheating the sludge, and improving the drying efficiency of the present invention; When the second drive motor 52 is started, the connecting shaft 53 synchronously drives the eccentric wheel 55 to rotate. During the rotation process, the eccentric wheel 55 intermittently enters the interior of the limit frame 62 and repeatedly strikes the top plate 7. As a result, the top plate 7 repeatedly moves up and down inside the limit frame 62 under the action of the eccentric wheel 55. During the movement, the top plate 7 drives the ejector pin 71 to repeatedly move inside the extended feed pipe 6. Then, the ejector pin 71 supports and strikes the sludge in the extended feed pipe 6, thereby breaking up the lumpy sludge. By pre-breaking the sludge blocks, the sludge blocks are dried more fully. Furthermore, during the process of the second drive motor 52 driving the impeller 54 to rotate, that is, during the process of the impeller 54 performing relay extraction, part of the hot air enters the interior of the limiting frame 62 through the air inlet 63, and then enters the interior of the ventilation cavity 61 through the air holes on the surface of the top plate 7, thereby increasing the temperature of the extended feed pipe 6. When the sludge circulates inside the extended feed pipe 6, the extended feed pipe 6 can further dry the sludge, thereby improving the efficiency of the sludge drying. At the same time, when the hot air passes through the top plate 7, it can heat the top plate 7 and the ejector pins 71, so that the temperature of the ejector pins 71 themselves increases, thereby improving the efficiency of the ejector pins 71 in breaking up the sludge clumps; Furthermore, when the ejector pin 71 moves repeatedly inside the extended feed tube 6, the ejector pin 71 and the extended feed tube 6 rub against each other repeatedly, causing the temperature of the ejector pin 71 to further increase. When the temperature of the ejector pin 71 increases, it not only softens the sludge blocks when breaking them, thereby improving the efficiency of the crushing, but also directly heats the sludge when the ejector pin 71 is inserted into the sludge, thereby further improving the efficiency of the sludge drying, so that the sludge is fully preheated when entering the interior of the rotating drum 12.

[0026] It should be noted that the top plate 7 and the top pin 71 are made of copper. When the eccentric wheel 55 is released from contact with the top plate 7, the top plate 7 is reset under the action of the elastic rope 72, and then waits for the eccentric wheel 55 to touch again.

[0027] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drying system for sewage treatment, comprising a base (1) and a bracket (2), characterized in that: A protective frame (23) is fixed on the surface of the bracket (2), an exhaust fan (24) is fixed inside the protective frame (23), an air guide pipe (25) is fixed on the surface of the protective frame (23), a support frame (3) is fixed on the end of the base (1) away from the bracket (2), a feeding pipe (33) is fixed inside the support frame (3), and a feeding assembly for conveying sludge is provided inside the feeding pipe (33); The feeding assembly includes a first driving motor (4), the first driving motor (4) is clamped inside the feeding tube (33), a closed tube (41) is fixed to one end of the first driving motor (4) close to the output shaft, a feeding screw rack (42) is rotatably connected inside the closed tube (41), and the feeding screw rack (42) is located inside the feeding tube (33), a connecting rod (43) is provided inside the feeding screw rack (42), an air groove (44) is fixed to the output shaft of the first driving motor (4), the air groove (44) is located inside the connecting rod (43), an end of the air groove (44) away from the first driving motor (4) is fixed to an end of the connecting rod (43) away from the first driving motor (4), and an end of the air guide tube (25) away from the bracket (2) is fixed to and communicated with the closed tube (41); An extension component for extending the sludge travel distance is provided on a side of the support frame (3) away from the heat source system (31).

2. The drying system for sewage treatment according to claim 1, characterized in that: A bracket (11) is fixed on the top of the base (1), a rotating drum (12) is rotatably connected inside the bracket (11), a reduction motor (13) is fixed on the top of the bracket (11), a gear plate (14) is fixed on one end of the rotating drum (12) close to the bracket (2), the gear plate (14) is meshed with the gear of the reduction motor (13), and a spiral plate (15) is fixed on the inner wall of the rotating drum (12).

3. The drying system for sewage treatment according to claim 2, characterized in that: Limit pins (21) are fixed on both sides of the bracket (2), and the limit pins (21) are fixed to the top of the base (1) through a dustproof frame (22).

4. The drying system for sewage treatment according to claim 3, characterized in that: The rotating drum (12) and the bracket (2) are in communication with each other, and the bottom of the bracket (2) is open.

5. The drying system for sewage treatment according to claim 4, characterized in that: A heat source system (31) is fixed on the surface of the support frame (3), a resistance wire (32) is fixed inside the heat source system (31), a feed funnel (34) is fixed on the top of the feed pipe (33), the heat source system (31) is in communication with the support frame (3), and the feed funnel (34) is in communication with the feed pipe (33).

6. The drying system for sewage treatment according to claim 5, characterized in that: The extension assembly comprises an extension tube (5), the extension tube (5) being fixed to the support frame (3), a mounting frame (51) being fixed to the inner wall of the extension tube (5), a second drive motor (52) being fixed inside the mounting frame (51), a connecting shaft (53) being fixed to the output shaft of the second drive motor (52), impellers (54) being fixed to the surfaces of both ends of the connecting shaft (53), and an eccentric wheel (55) being fixed to the surface of the connecting shaft (53) located in the middle of the two impellers (54).

7. The drying system for sewage treatment according to claim 6, characterized in that: An extension feed pipe (6) is fixed to one end of the feed pipe (33) away from the first drive motor (4), a ventilation cavity (61) is provided inside the extension feed pipe (6), a limiting frame (62) is fixed to the bottom of the extension feed pipe (6), the ventilation cavity (61) is communicated with the limiting frame (62), an air inlet (63) is provided at the bottom of the limiting frame (62), and the inner circle of the extension feed pipe (6) is inclined near one end of the feed pipe (33).

8. The drying system for sewage treatment according to claim 7, characterized in that: The interior of the limiting frame (62) is slidably connected to a top plate (7), the surface of the top plate (7) is provided with air holes, a top pin (71) is fixed to the top of the top plate (7), the top pin (71) is slidably connected to the extended feed tube (6), and elastic ropes (72) are fixed to the bottoms of both ends of the top plate (7), and the elastic ropes (72) are fixed to the limiting frame (62).

9. The drying system for sewage treatment according to claim 8, characterized in that: The air guide pipe (25) is provided with two sections, and the two sections of the air guide pipe (25) are connected via a bellows (251).

Images