A drying system for sewage treatment

Abstract

The present application relates to sewage sludge treatment technical field, and disclose a kind of for sewage treatment drying system, including base and support, the surface of the support is fixed with guard frame, the inside of the guard frame is fixed with exhaust fan, the surface of the guard frame is fixed with air duct, the end of the base away from support is fixed with support frame, the inside of the support frame is fixed with feeding pipe, the inside of the feeding pipe is equipped with the feeding assembly for conveying sludge, the feeding assembly includes first drive motor, the first drive motor is clamped in the inside of feeding pipe, the drying system for sewage treatment, the hot air collected in the inside of guard frame is sent into the inside of closed pipe by air duct, in turn, so that hot air enters the inside of feeding spiral frame, when feeding spiral frame is in pushing sludge, the hot air recycled by connecting rod can be pre-dried to sludge by feeding spiral frame, and then the efficiency of sludge drying is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater and sludge treatment technology, specifically to a drying system for wastewater treatment. Background Technology

[0002] Wastewater treatment refers to the process of treating various types of wastewater, such as domestic sewage and industrial wastewater, to ensure that the water quality meets discharge standards or reuse requirements, thereby reducing pollution to the water environment and protecting water resources. It is an important link in environmental protection and sustainable use of water resources. During the wastewater treatment process, sludge will continuously accumulate. In order to reduce, stabilize, render harmless, and recycle the sludge, it is usually treated and recycled. The sludge dryer is the core equipment for wastewater and sludge treatment.

[0003] When the sludge accumulated in the sewage is transported into the sludge dryer, the air around the heat source is drawn into the dryer through the exhaust system. The air then comes into contact with and is heated by the sludge turning in the dryer, causing the wet sludge to dry. Currently, sludge dryers on the market, due to the exhaust system, cause the hot air to circulate once inside the rotating drum before being discharged to the outside. This results in the outside air being overheated, affecting the working environment, and also wastes the heat energy of the discharged air. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a drying system for wastewater treatment, which solves the problems mentioned in the background section.

[0005] The present invention provides the following technical solution: a drying system for sewage treatment, comprising a base and a support, wherein a protective frame is fixed on the surface of the support, an exhaust fan is fixed inside the protective frame, an air guide pipe is fixed on the surface of the protective frame, a support frame is fixed at the end of the base away from the support, a feeding pipe is fixed inside the support frame, and a feeding component for conveying sludge is provided inside the feeding pipe. The feeding assembly includes a first drive motor, which is snapped into the inside of the feeding tube. A closed tube is fixed to one end of the first drive motor near the output shaft. A feeding screw frame is rotatably connected inside the closed tube and is located inside the feeding tube. A connecting rod is provided inside the feeding screw frame. An air groove is fixed to the output shaft of the first drive motor. The air groove is located inside the connecting rod. The end of the air groove away from the first drive motor is fixed to the end of the connecting rod away from the first drive motor. The end of the air guide tube away from the support is fixed to and communicates with the closed tube. The support frame is provided with an extension component on the side away from the heat source system to extend the sludge travel.

[0006] Optionally, a bracket is fixed to the top of the base, a rotating cylinder is rotatably connected inside the bracket, a geared motor is fixed to the top of the bracket, a gear disk is fixed to one end of the rotating cylinder near the support, the gear disk meshes with the gear of the geared motor, and a spiral plate is fixed to the inner wall of the rotating cylinder.

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

[0008] Optionally, the rotating drum is in communication with the support, and the bottom of the support is open.

[0009] Optionally, a heat source system is fixed to the surface of the support frame, a resistance wire is fixed inside the heat source system, a feeding funnel is fixed to 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 a 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 at both ends of the connecting shaft. An eccentric wheel is fixed to the surface of the connecting shaft at the middle of the two impellers.

[0011] Optionally, an extension feeding pipe is fixed to the end of the feeding pipe away from the first drive motor. A ventilation cavity is opened inside the extension feeding pipe. A limit frame is fixed to the bottom of the extension feeding pipe. The ventilation cavity is connected to the limit frame. An air inlet is opened at the bottom of the limit frame. The inner circle of the extension feeding pipe is inclined at the end near the feeding pipe.

[0012] Optionally, the limiting frame has a top plate slidably connected inside, the surface of the top plate has air holes, the top of the top plate is fixed with a pin, the pin is slidably connected with the extended feeding tube, and elastic ropes are fixed at the bottom of both ends of the top plate, the elastic ropes are fixed to the limiting frame.

[0013] Optionally, the air guide tube has two sections, and the two sections are connected by a corrugated pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This drying system for wastewater treatment transmits the hot air collected inside the protective frame into the interior of the closed pipe through the air guide pipe, and then the hot air enters the interior of the feeding screw frame. When the feeding screw frame pushes the sludge, the hot air recovered by the connecting rod can pre-dry the sludge through the feeding screw frame, thereby improving the efficiency of sludge drying.

[0015] 2. This drying system for wastewater treatment drives the impeller and eccentric wheel to rotate via a second drive motor, which allows the hot air around the resistance wire to circulate more quickly to the exhaust fan, making the temperature at both ends of the drum more even and the sludge drying more uniform. At the same time, the eccentric wheel can strike the top plate, which in turn drives the pin to chisel the sludge in the extended feeding pipe, thus allowing the crushed sludge to be dried more thoroughly. Attached Figure Description

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

[0017] In the diagram: 1. Base; 11. Bracket; 12. Rotary drum; 13. Gear motor; 14. Gear disc; 15. Spiral plate; 2. Support; 21. Limit pin; 22. Dustproof frame; 23. Protective frame; 24. Exhaust fan; 25. Air guide pipe; 251. Corrugated pipe; 3. Support frame; 31. Heat source system; 32. Resistance wire; 33. Feeding pipe; 34. Feeding funnel; 4. First drive motor; 41. Sealing pipe; 42. Feeding spiral frame; 43. Connecting rod; 44. Air groove; 5. Extension pipe; 51. Mounting frame; 52. Second drive motor; 53. Connecting shaft; 54. Impeller; 55. Eccentric wheel; 6. Extension feeding pipe; 61. Ventilation chamber; 62. Limit frame; 63. Air inlet; 7. Top plate; 71. Ejector pin; 72. Elastic rope. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1

[0020] Please see Figure 1-8 A drying system for wastewater treatment includes a base 1 and a support 2. A protective frame 23 is fixed to the surface of the support 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 support 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 snapped into the inside of the feeding tube 33. A closed tube 41 is fixed to one end of the first drive motor 4 near the output shaft. A feeding screw frame 42 is rotatably connected inside the closed tube 41 and is located inside the feeding tube 33. A connecting rod 43 is provided inside the feeding screw frame 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. The end of the air groove 44 away from the first drive motor 4 is fixed to the end of the connecting rod 43 away from the first drive motor 4. The end of the air guide tube 25 away from the bracket 2 is fixed to and connected to the closed tube 41. The support frame 3 is provided with an extension component for extending the sludge travel on the side away from the heat source system 31. The top of the base 1 is fixed with a bracket 11. The inside of the bracket 11 is rotatably connected to a rotating drum 12. The top of the bracket 11 is fixed with a reduction motor 13. The end of the rotating drum 12 near the support 2 is fixed with a gear disk 14. The gear disk 14 meshes with the gear of the reduction motor 13. The inner wall of the rotating drum 12 is fixed with a spiral plate 15. Limit pins 21 are fixed on both sides of the bracket 2. The limit pins 21 are fixed to the top of the base 1 through the dustproof frame 22. The rotating drum 12 is connected to the bracket 2. The bottom of the bracket 2 is open. 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 feeding funnel 34 is fixed on the top of the feeding pipe 33. The heat source system 31 is connected to the support frame 3. 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 the corrugated pipe 251. In the specific operation process, firstly, the support frame 3 is pushed, which drives the extension component to move, so that the support frame 3 is connected to the rotating drum 12 through the extension component. Then, the controller starts the resistance wire 32 and the exhaust fan 24, 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 drawn into the interior of the protective frame 23. During the circulation of hot air, the hot air passes through the rotating drum 12, and then transfers heat to the inner wall of the rotating drum 12 and the air inside the rotating drum 12, so that the inner wall of the rotating drum 12, the spiral plate 15 and the air inside the rotating drum 12 are preheated. During the preheating process, the hot air entering the protective frame 23 rises and enters the interior of the top of the protective frame 23, and then enters the interior of the air guide pipe 25. Subsequently, the hot air enters the interior of the closed pipe 41 through the air guide pipe 25, and the hot air in the closed pipe 41 enters the interior of the connecting rod 43 through the closed pipe 41, so that the interior of the connecting rod 43 is filled with hot air, thereby heating the feeding screw frame 42. After preheating, the sludge is fed into the feed hopper 34 by other feeding equipment. Then, the reduction motor 13 is started, which drives the gear disk 14 to rotate. The gear disk 14 then drives the rotating drum 12 to rotate. The sludge enters the feed pipe 33 through the feed hopper 34 and then comes into contact with the feeding screw 42. The controller then starts the first drive motor 4, which drives the air groove 44 to rotate. The air groove 44 then drives the feeding screw 42 to rotate inside the closed pipe 41. During the rotation, the feeding screw 42 pushes the sludge toward the rotating drum 12. During the process of pushing the sludge, the sludge comes into full contact with the surface of the feeding screw frame 42, and then the hot air in the connecting rod 43 passes through the feeding screw frame 42 to preheat the sludge, so that some of the moisture in the sludge can be dried in advance during the process of conveying the sludge in the feeding pipe 33, thereby improving the efficiency of sludge drying. After the sludge is discharged from the inside of the feeding pipe 33, it falls into the inside of the rotating drum 12. At this time, the rotating drum 12 drives the spiral plate 15 to rotate. When the sludge enters the inside of the rotating drum 12, under the action of the spiral plate 15, the hot air inside the spiral plate 15 and the rotating drum 12 dry the sludge until the spiral plate 15 pushes the sludge into the inside of the support 2 and falls into the top of the base 1 through the support 2. At this time, the sludge is dried and discharged.

[0021] It should be noted that all the devices in this invention are controlled by a controller. The reason why the rotating drum 12 needs to be preheated is to prevent the sludge from entering the interior of the support 2 through the rotating drum 12 before the air inside the rotating drum 12 has reached the temperature for drying the sludge. The hot air is transported through the air duct 25 not only during the preheating process, but also during the subsequent drying process. The hot air inside the rotating drum 12, under the action of the exhaust fan 24, still enters the interior of the protective frame 23 and is continuously replenished into the interior of the feeding screw frame 42 through the air duct 25. At the same time, the end of the feeding screw frame 42 away from the first drive motor 4 is provided with an exhaust port, which allows the hot air to be continuously replenished into the interior of the feeding screw frame 42. The hot air discharged from the feeding screw frame 42 can re-enter the interior of the rotating drum 12 and circulate and heat the sludge inside the rotating drum 12. At the same time, the presence of the exhaust port allows the exhaust fan 24 to exhaust the feeding screw frame 42, making the interior of the feeding screw frame 42 a negative pressure state, which in turn makes the air duct 25 a negative pressure state, thereby allowing the hot air to be stably transported into the interior of the air duct 25. Compared to traditional sludge dryers, this invention allows for the recycling of hot air discharged from the rotating drum 12, improving drying efficiency while reducing energy consumption. When cleaning and maintenance are required after drying, the dust cover 22 on the side away from the corrugated pipe 251 can be pulled out, allowing the dust cover 22 on the side closer to the corrugated pipe 251 to continue to limit the limit pin 21. At this time, the bracket 2 can be rotated, and since the corrugated pipe 251 is flexible, the air guide pipe 25 can be flipped. At the same time, the corrugated pipe 251 can also be disassembled. When it is necessary to completely remove the bracket 2, pull out the two dust covers 22 and remove the corrugated pipe 251 to disconnect the two sections of the air guide pipe 25, and then remove the bracket 2.

[0022] Example 2

[0023] The extension assembly includes an extension tube 5, which is fixed to a support frame 3. An installation frame 51 is fixed to the inner wall of the extension tube 5. A second drive motor 52 is fixed inside the installation frame 51. A connecting shaft 53 is fixed to the output shaft of the second drive motor 52. Impellers 54 are fixed to the surfaces at both ends of the connecting shaft 53. An eccentric wheel 55 is fixed to the surface of the connecting shaft 53 at the middle of the two impellers 54. Specifically, based on Embodiment 1, when the resistance wire 32 and the exhaust fan 24 are started, since the exhaust fan 24 and the resistance wire 32 are at a certain distance, 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 rotating drum 12, the temperature of the hot air gradually decreases as it comes into contact with the room temperature air in the rotating drum 12. That is, the closer the hot air is to the exhaust fan 24, the lower its temperature. Therefore, during the exhaust process of the exhaust fan 24, the second drive motor 52 is started by the controller, which drives the connecting shaft 53 to rotate, which in turn drives the impeller 54 to rotate. This causes the impeller 54 to act as a relay exhaust, accelerating the flow of hot air around the resistance wire 32 toward the exhaust fan 24. This allows the hot air to quickly reach the exhaust fan 24, resulting in a more even temperature at both ends of the rotating drum 12. This, in turn, improves the uniformity of the hot air drying of the sludge inside the rotating drum 12.

[0024] Example 3

[0025] An extension feeding pipe 6 is fixed to one end of the feeding pipe 33 away from the first drive motor 4. A ventilation cavity 61 is provided inside the extension feeding pipe 6. A limit frame 62 is fixed to the bottom of the extension feeding pipe 6. The ventilation cavity 61 is connected to the limit frame 62. An air inlet 63 is provided at the bottom of the limit frame 62. The inner ring of the extension feeding pipe 6 is inclined at one end near the feeding pipe 33. A top plate 7 is slidably connected inside the limit frame 62. An air hole is provided on the surface of the top plate 7. A pin 71 is fixed to the top of the top plate 7. The pin 71 is slidably connected to the extension feeding pipe 6. Elastic ropes 72 are fixed to the bottom of both ends of the top plate 7. The elastic ropes 72 are fixed to the limit frame 62. Specifically, based on Embodiment 1 and Embodiment 2, when the feeding screw 42 pushes the sludge, the sludge enters the interior of the extended feeding pipe 6 through the feeding pipe 33. With the extended feeding pipe 6 inclined at the end near the feeding pipe 33, the flow rate is reduced, which slows down the conveying speed of the sludge in the extended feeding pipe 6. This reduces the speed of subsequent sludge replenishment, increases the contact time between the replenished sludge and the feeding screw 42, prolongs the drying time of the feeding screw 42, and improves the efficiency of the feeding screw 42 in preheating the sludge, thus improving the drying efficiency of the present invention. When the second drive motor 52 starts, the connecting shaft 53 synchronously drives the eccentric wheel 55 to rotate. During the rotation, the eccentric wheel 55 intermittently enters the interior of the limiting frame 62 and repeatedly strikes the top plate 7. As a result, the top plate 7 moves up and down repeatedly inside the limiting frame 62 under the action of the eccentric wheel 55. During the movement of the top plate 7, the ejector pin 71 moves repeatedly inside the extended feeding tube 6. This causes the ejector pin 71 to perform a supporting and chiseling operation on the sludge inside the extended feeding tube 6, breaking up the blocky sludge. Through the pre-crushing of the sludge blocks, the sludge blocks are dried more thoroughly. Furthermore, during the rotation of the impeller 54 driven by the second drive motor 52, that is, during the intermediate exhaust process of the impeller 54, some of the hot air enters the interior of the limit frame 62 through the air inlet 63, and then enters the interior of the ventilation chamber 61 through the air holes on the surface of the top plate 7, which raises the temperature of the extended feeding pipe 6. When the sludge flows inside the extended feeding pipe 6, the extended feeding pipe 6 can further dry the sludge, thereby improving the efficiency of sludge drying. At the same time, when hot air passes through the top plate 7, it can heat the top plate 7 and the ejector pin 71, thereby increasing the temperature of the ejector pin 71 and improving the efficiency of the ejector pin 71 in breaking up sludge blocks. Furthermore, as the ejector pin 71 moves repeatedly inside the extended feeding tube 6, the repeated friction between the ejector pin 71 and the extended feeding tube 6 causes the temperature of the ejector pin 71 to rise further. When the temperature of the ejector pin 71 rises, it can not only soften the sludge blocks and improve the crushing efficiency when crushing sludge blocks, but also directly heat the sludge when the ejector pin 71 is inserted into the sludge, thereby further improving the efficiency of sludge drying, so that the sludge is fully preheated when it enters the interior of the rotating drum 12.

[0026] It should be noted that the top plate 7 and the ejector pin 71 are made of copper. After 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 it again.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying system for wastewater treatment, comprising a base and a support, characterized in that: A protective frame is fixed to the surface of the support, an exhaust fan is fixed inside the protective frame, an air guide pipe is fixed to the surface of the protective frame, a support frame is fixed to the end of the base away from the support, a feeding pipe is fixed inside the support frame, and a feeding component for conveying sludge is provided inside the feeding pipe. The feeding assembly includes a first drive motor, which is snapped into the inside of the feeding tube. A closed tube is fixed to one end of the first drive motor near its output shaft. A feeding screw frame is rotatably connected inside the closed tube. An exhaust hole is provided at the end of the feeding screw frame away from the first drive motor, and the feeding screw frame is located inside the feeding tube. A connecting rod is provided inside the feeding screw frame. An air groove is fixed to the output shaft of the first drive motor. The air groove is located inside the connecting rod. The end of the air groove away from the first drive motor is fixed to the end of the connecting rod away from the first drive motor. The end of the air guide tube away from the support is fixed to and communicates with the closed tube. The support frame is provided with an extension component on the side away from the heat source system to extend the sludge travel. The extension assembly includes an extension tube, an installation bracket is fixed to the inner wall of the extension tube, a second drive motor is fixed inside the installation bracket, a connecting shaft is fixed to the output shaft of the second drive motor, and an eccentric wheel is fixed to the surface of the connecting shaft at the middle of the two impellers. An extension feeding pipe is fixed to one end of the feeding pipe away from the first drive motor. A ventilation cavity is provided inside the extension feeding pipe. A limit frame is fixed to the bottom of the extension feeding pipe. The ventilation cavity is connected to the limit frame. An air inlet is provided at the bottom of the limit frame. The limiting frame has a top plate that is slidably connected inside. The surface of the top plate has air holes. A pin is fixed on the top of the top plate. The pin is slidably connected to the extension feeding tube. A bracket is fixed to the top of the base, and a rotating cylinder is rotatably connected inside the bracket. A geared motor is fixed to the top of the bracket, and a gear disk is fixed to one end of the rotating cylinder near the support. The gear disk meshes with the gear of the geared motor, and a spiral plate is fixed to the inner wall of the rotating cylinder.

2. The drying system for wastewater treatment according to claim 1, characterized in that: Limit pins are fixed on both sides of the bracket, and the limit pins are fixed to the top of the base by a dustproof frame.

3. The drying system for wastewater treatment according to claim 2, characterized in that: The rotating drum is connected to the support frame, and the bottom of the support frame is open.

4. The drying system for wastewater treatment according to claim 3, characterized in that: A heat source system is fixed to the surface of the support frame, and a resistance wire is fixed inside the heat source system. A feeding funnel is fixed to 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.

5. The drying system for wastewater treatment according to claim 4, characterized in that: The extension tube is fixed to the support frame, and impellers are fixed to the surfaces at both ends of the connecting shaft.

6. The drying system for wastewater treatment according to claim 5, characterized in that: The inner ring of the extended feed tube is inclined at one end near the feed tube.

7. The drying system for wastewater treatment according to claim 6, characterized in that: Elastic ropes are fixed to the bottom of both ends of the top plate, and the elastic ropes are fixed to the limiting frame.

8. The drying system for wastewater treatment according to claim 7, characterized in that: The air duct has two sections, and the two sections are connected by a corrugated pipe.

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