Low energy consumption sludge thermal drying device

Abstract

The utility model discloses a low energy consumption sludge hot drying device, including hot dry case, one side of the outer wall of hot dry case is connected with spiral conveyor, and the feed inlet of spiral conveyor is connected with feed hopper, and the mixing part is equipped with the broken roll and transmission gear, and the motor drives the stirring rod to stir, and the stirring rod drives the connecting shaft to rotate through the connecting plate, and the connecting shaft drives the broken roll revolution, simultaneously, the connecting shaft rotation drives the transmission gear revolution, and under the action of the gear ring, makes two transmission gears rotate to drive two broken rolls to rotate respectively, and the broken roll is used for crushing the gradually dry and solidified sludge, and the sludge can be stirred and crushed through the mode, and the sludge can be crushed and scattered, which can increase the contact area of the sludge and the heat in the hot dry case, solve the low heat transfer efficiency of the traditional device, improve the sludge drying speed, and greatly reduce the device energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge treatment equipment, specifically a low-energy sludge thermal drying device. Background Technology

[0002] With the deepening of urbanization and increasingly stringent environmental standards, the amount of sludge produced by wastewater treatment plants continues to rise. Sludge has a high water content and contains pathogens, heavy metals, and other harmful substances; improper disposal can easily cause serious secondary pollution. Against this backdrop, sludge thermal drying technology, as a key means to achieve sludge reduction, stabilization, and resource utilization, effectively reduces sludge volume and weight and inactivates pathogens by heating and evaporating moisture.

[0003] Currently, various types of thermal drying equipment widely used in this field, whether direct or indirect heating, generally integrate a stirring mechanism within the cavity to improve the uniformity of sludge heating. However, a prominent problem is that during the heating and stirring process, the surface sludge dries and hardens due to rapid water loss, forming a hardened layer that surrounds the inner wet sludge. This hardened layer has insulating properties, which severely hinders heat transfer to the interior of the sludge, resulting in a significant decrease in heat transfer efficiency. Consequently, the equipment must significantly extend the heating time or increase the temperature to achieve the predetermined drying target, leading to a significant increase in energy consumption. Utility Model Content

[0004] The purpose of this invention is to provide a low-energy sludge thermal drying device to solve the problems mentioned in the background section. To solve these technical problems, this invention is achieved through the following technical solution:

[0005] This utility model is a low-energy sludge thermal drying device, comprising:

[0006] A hot drying box, wherein a screw conveyor is connected to one side of the outer wall of the hot drying box, and a feed hopper is connected to the feed inlet of the screw conveyor;

[0007] The mixing component includes a motor, an agitator fixedly mounted on the output end of the motor, a horizontal plate fixedly mounted on the outer wall of the agitator, two connecting shafts passing through the top of the horizontal plate, transmission gears fixedly mounted on the outer walls of the two connecting shafts, and the two transmission gears meshing with each other, a gear ring meshing on the outer wall of one of the transmission gears, the outer wall of the gear ring being fixedly connected to the interior of the hot drying box, and a crushing roller fixedly mounted on the bottom end of the two connecting shafts.

[0008] Preferably, each of the two connecting shafts is fixedly provided with a guide post at its top end, and the top ends of the two guide posts are slidably connected to the inner top end of the hot drying box.

[0009] Preferably, the mixing component further includes a slider, one side of which is fixedly disposed on one side of the horizontal plate, and the outer wall of the slider is slidably connected to the inner wall of the hot drying box.

[0010] Preferably, a scraper is fixedly provided between the cross plate and the stirring rod, and one side of the scraper is in contact with the inner wall of the hot drying box.

[0011] Preferably, the outer wall of the stirring rod extends through the top of the hot drying box, and the bottom end of the stirring rod does not contact the inner bottom end of the hot drying box.

[0012] Preferably, a support rod is fixedly provided on one side of the feed hopper, and one end of the support rod is fixedly connected to the outer wall of the hot drying box.

[0013] Preferably, it also includes an exhaust component, which includes a filter box connected to the outer wall of the hot drying box, an exhaust pipe connected to one side of the filter box, a diverter pipe connected to the outer wall of the exhaust pipe, and one end of the diverter pipe connected to the outer wall of the screw conveyor.

[0014] This utility model has the following beneficial effects:

[0015] This invention features a crushing roller and transmission gears. During the agitation process, a motor drives a stirring rod, which in turn drives a connecting shaft via a connecting plate. This connecting shaft, in turn, causes the crushing roller to revolve. Simultaneously, the rotation of the connecting shaft drives the transmission gears to revolve, and under the action of the gear ring, both transmission gears rotate, thereby driving the two crushing rollers to rotate independently. The crushing rollers then break up the gradually drying and solidifying sludge. This method not only provides auxiliary agitation for the sludge but also breaks it down, increasing the contact area between the sludge and the heat in the drying chamber. This solves the problem of low heat transfer efficiency in traditional devices, increases the sludge drying speed, and significantly reduces the energy consumption of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of 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 overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the mixing component of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the screw conveyor and the exhaust pipe of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 11. Hot drying box; 12. Screw conveyor; 13. Feed hopper; 131. Support rod; 14. Filter box; 15. Exhaust pipe; 16. Guide pipe; 21. Motor; 22. Stirring rod; 23. Horizontal plate; 24. Connecting shaft; 241. Guide column; 25. Transmission gear; 26. Gear ring; 27. Crushing roller; 28. Sliding block; 29. ​​Scraper. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the objectives, technical solutions and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Please see Figure 1-3 As shown, this utility model is a low-energy sludge thermal drying device, comprising:

[0025] A hot drying box 11 is provided with a screw conveyor 12 connected to one side of its outer wall, and a feed hopper 13 is connected to the feed inlet of the screw conveyor 12.

[0026] The mixing component includes a motor 21. An agitator 22 is fixedly provided at the output end of the motor 21. A horizontal plate 23 is fixedly provided on the outer wall of the agitator 22. Two connecting shafts 24 are provided through the top of the horizontal plate 23. A transmission gear 25 is fixedly provided on the outer wall of each of the two connecting shafts 24, and the two transmission gears 25 mesh with each other. A gear ring 26 is meshed on the outer wall of one of the transmission gears 25. The outer wall of the gear ring 26 is fixedly connected to the inside of the hot drying box 11. A crushing roller 27 is fixedly provided at the bottom end of each of the two connecting shafts 24.

[0027] The hot drying chamber 11 is equipped with a heating plate, which provides a closed drying space for the metal, ensuring concentrated heat without loss and improving heating efficiency, while also preventing the leakage of exhaust gas and dust generated during the drying process, thus avoiding secondary pollution. It also provides an installation reference for the mixing components and guiding structure, supporting the stable operation of the entire internal structure. The screw conveyor 12, model WLS-200, is used to uniformly and stably transport the sludge to be dried from the feed hopper 13 into the hot drying chamber 11. The motor 21, model Y100L-6, provides the power source for the entire mixing component. The bottom of the motor 21 is fixedly mounted on the top of the hot drying chamber 11. The stirring rod 22 is used to agitate the sludge inside the hot drying chamber 11. The connecting shaft 24 rotates in conjunction with the horizontal plate 23. The crushing roller 27 mechanically crushes the sludge inside the hot drying chamber 11 through a combined motion of revolution and rotation.

[0028] The top ends of the two connecting shafts 24 are each fixedly provided with guide posts 241, and the top ends of the two guide posts 241 are slidably connected to the inner top end of the hot drying box 11.

[0029] When the connecting shaft 24 moves in a circular motion with the horizontal plate 23, the guide column 241 slides along the top of the inner wall of the hot drying box 11, which restricts the movement trajectory of the connecting shaft 24, prevents the connecting shaft 24 from deviating due to centrifugal force, ensures the stable movement of the crushing roller 27, and avoids collision with the inner wall of the hot drying box 11.

[0030] The mixing component also includes a slider 28, one side of which is fixedly mounted on one side of the horizontal plate 23, and the outer wall of the slider 28 is slidably connected to the inner wall of the hot drying box 11.

[0031] The slider 28 can not only limit the radial displacement of the horizontal plate 23 and prevent the horizontal plate 23 from shaking, but also reduce the frictional resistance when the horizontal plate 23 rotates, thus improving the smoothness of the entire mixing component. The inner wall of the hot drying box 11 is provided with a groove that matches the slider 28, and the groove is higher than the discharge port of the screw conveyor 12.

[0032] A scraper 29 is fixedly provided between the horizontal plate 23 and the stirring rod 22, and one side of the scraper 29 is in contact with the inner wall of the hot drying box 11.

[0033] The scraper 29 is used to scrape off the sludge adhering to the inner wall of the hot drying box 11 to prevent the sludge from forming scale and affecting the heat transfer efficiency.

[0034] The outer wall of the stirring rod 22 penetrates the top of the hot drying box 11, and the bottom end of the stirring rod 22 does not contact the inner bottom end of the hot drying box 11.

[0035] The stirring rod 22 is rotatably engaged with the hot drying box 11, and is connected to the hot drying box 11 for rotation, thereby improving the overall stability of the stirring rod 22 during rotation.

[0036] A support rod 131 is fixedly provided on one side of the feed hopper 13, and one end of the support rod 131 is fixedly connected to the outer wall of the hot drying box 11.

[0037] The support rod 131 provides stable support for the feed hopper 13, preventing the feed hopper 13 from tilting or falling off due to the weight of the sludge or long-term use, thus ensuring the structural stability of the feeding process.

[0038] Working principle: The screw conveyor 12 is turned on, transporting the sludge from the feed hopper 13 to the heat drying chamber 11. During the heat drying process in the heat drying chamber 11, the motor 21 is turned on, driving the stirring rod 22 to rotate. The rotating stirring rod 22 agitates the sludge, thus ensuring uniform heat drying. Furthermore, the rotation of the stirring rod 22 drives the connecting plate 23 to rotate. The rotation of the connecting plate 23, through the connecting shaft 24, drives the crushing roller 27 to rotate. Simultaneously, the rotation of the connecting shaft 24 also drives the transmission gear 25 to rotate. During the revolution of the transmission gear 25, the gear ring 26 causes the two transmission gears 25 to rotate, thereby driving the two crushing rollers 27 to rotate. The crushing rollers 27 crush the gradually drying and solidifying sludge. In this way, the "revolution + rotation" of the crushing rollers 27 not only assists in stirring, but also crushes and disperses the sludge. This increases the contact area between the sludge and the heat in the drying chamber, solves the problem of low heat transfer efficiency in traditional devices, improves the sludge drying speed, and greatly reduces the energy consumption of the device.

[0039] Please see Figure 1-3 As shown, this embodiment is based on the above embodiment:

[0040] It also includes an exhaust component, which includes a filter box 14 connected to the outer wall of the hot drying box 11. An exhaust pipe 15 is connected to one side of the filter box 14. A diversion pipe 16 is connected to the outer wall of the exhaust pipe 15. One end of the diversion pipe 16 is connected to the outer wall of the screw conveyor 12.

[0041] The filter box 14 is equipped with filter media such as filter screen, activated carbon layer or biological filter media, which are used to treat the waste gas generated during the sludge thermal drying process and reduce the risk of secondary pollution. Control valves are installed on the exhaust pipe 15 and the diversion pipe 16.

[0042] Working principle: During the thermal drying process of sludge in the hot drying box 11, the waste gas generated is transported to the filter box 14. After being filtered by the filter box 14, it is finally discharged to the outside through the exhaust pipe 15. At the same time, part of the hot waste gas in the exhaust pipe 15 is transported to the inside of the screw conveyor 12 through the guide pipe 16, thereby preheating the sludge in the screw conveyor 12. This method can recycle the waste heat of the waste gas, which can not only reduce the overall energy consumption of the device, but also reduce the moisture content of the sludge in advance, accelerate the drying process in the subsequent hot drying box 11, and improve the drying efficiency of the device.

[0043] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low-energy sludge thermal drying device, characterized in that, include: A hot drying box (11) is provided with a screw conveyor (12) connected to one side of the outer wall of the hot drying box (11), and a feed hopper (13) is connected to the feed inlet of the screw conveyor (12). The mixing component includes a motor (21), an agitator (22) is fixedly provided at the output end of the motor (21), a horizontal plate (23) is fixedly provided on the outer wall of the agitator (22), two connecting shafts (24) are provided through the top of the horizontal plate (23), a transmission gear (25) is fixedly provided on the outer wall of each of the two connecting shafts (24), and the two transmission gears (25) mesh with each other. A gear ring (26) is meshed on the outer wall of one of the transmission gears (25), and the outer wall of the gear ring (26) is fixedly connected to the inside of the hot drying box (11). A crushing roller (27) is fixedly provided at the bottom end of each of the two connecting shafts (24).

2. The low-energy sludge thermal drying device according to claim 1, characterized in that: The top ends of the two connecting shafts (24) are fixedly provided with guide posts (241), and the top ends of the two guide posts (241) are slidably connected to the inner top end of the hot drying box (11).

3. The low-energy sludge thermal drying device according to claim 1, characterized in that: The mixing component also includes a slider (28), one side of which is fixedly disposed on one side of the horizontal plate (23), and the outer wall of the slider (28) is slidably connected to the inner wall of the hot drying box (11).

4. The low-energy sludge thermal drying device according to claim 1, characterized in that: A scraper (29) is fixedly provided between the horizontal plate (23) and the stirring rod (22), and one side of the scraper (29) is in contact with the inner wall of the hot drying box (11).

5. The low-energy sludge thermal drying device according to claim 1, characterized in that: The outer wall of the stirring rod (22) penetrates the top of the hot drying box (11), and the bottom end of the stirring rod (22) does not contact the inner bottom end of the hot drying box (11).

6. The low-energy sludge thermal drying device according to claim 1, characterized in that: A support rod (131) is fixedly provided on one side of the feed hopper (13), and one end of the support rod (131) is fixedly connected to the outer wall of the hot drying box (11).

7. The low-energy sludge thermal drying device according to claim 1, characterized in that: It also includes an exhaust component, which includes a filter box (14) connected to the outer wall of the hot drying box (11), an exhaust pipe (15) connected to one side of the filter box (14), a diversion pipe (16) connected to the outer wall of the exhaust pipe (15), and one end of the diversion pipe (16) connected to the outer wall of the screw conveyor (12).

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