Sludge granulation device

Abstract

The utility model belongs to sludge drying technical field discloses a kind of sludge granulating device. Sludge granulating device includes granulating bin, granulating mechanism and drive arrangement. Among them, the upper portion of granulating bin is equipped with the opening for sludge to enter, the bottom of granulating bin is equipped with screen plate, and the cross section of screen plate is arc-shaped;Granulating mechanism includes shaft and granulating unit, and shaft is rotatably installed in granulating bin along the length direction of granulating bin, and granulating unit includes multiple cutting plate, cutting plate includes shear extrusion section and shear connecting section, shear extrusion section is used to shear sludge and extrude sludge from screen plate, both ends of shear extrusion section are equipped with shear connecting section, and the end of shear connecting section is connected with the outer circumferential wall of shaft and is used to shear sludge;Drive arrangement is used to drive shaft to rotate around its axis. The sludge granulating device can shear sludge and then extrude and granulate, reduce the risk of equipment blockage and jam, and thus improve the stability and efficiency of sludge granulation.

Description

Technical Field

[0001] This utility model relates to the field of sludge drying technology, and in particular to a sludge granulator. Background Technology

[0002] Wastewater treatment generates a large amount of sludge. To avoid secondary pollution, the sludge needs to be dried before landfilling and solidification. Dewatering and drying sludge consumes a significant amount of energy. Sludge varies in shape and size; larger sludge requires longer drying times at the same temperature, while smaller, more regularly shaped sludge dries faster. Therefore, to facilitate sludge drying, improve efficiency, and reduce energy consumption, sludge granulators are typically used to break down the sludge into small, regularly shaped pieces.

[0003] Currently, sludge front-end granulation mainly uses strip cutting. During the sludge strip cutting process, the sludge is easily blocked by soft materials such as fibers, hair, and straw, leading to granulation failures or even equipment shutdowns.

[0004] Therefore, there is an urgent need to develop a sludge granulation device to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a sludge granulation device that can shear sludge and then compress it into granules, reducing the risk of equipment blockage and shutdown, thereby improving the stability and efficiency of sludge granulation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The sludge granulation device includes:

[0008] The granulation chamber has an opening at the top for sludge to enter and a mesh plate at the bottom with an arc-shaped cross-section.

[0009] The granulation mechanism includes a rotating shaft and a granulation unit. The rotating shaft is rotatably installed inside the granulation chamber along the length of the granulation chamber. The granulation unit includes a plurality of cutting plates spaced circumferentially along the rotating shaft. Each cutting plate includes a shearing and extrusion section and a shearing and connecting section. The shearing and extrusion section is used to shear sludge and extrude the sludge from the screen plate. Both ends of the shearing and extrusion section are provided with the shearing and connecting section. The end of the shearing and connecting section is connected to the outer peripheral wall of the rotating shaft and is used to shear sludge.

[0010] A drive device for driving the rotating shaft to rotate about its own axis.

[0011] Optionally, the angle between the shearing and extrusion section and the tangent of the mesh plate is 15°-20°, and one side of the shearing and extrusion section can slide against the mesh plate.

[0012] Optionally, multiple cutting plates of the same granulation unit are arranged at equal intervals along the circumference of the rotating shaft.

[0013] Optionally, the rotating shaft is provided with a plurality of granulation units, which are arranged adjacent to each other along the axial direction of the rotating shaft, and the cutting plates in two adjacent granulation units are staggered.

[0014] Optionally, each of the granulation units is provided with six cutting plates, which are equally spaced along the circumference of the rotation axis and staggered by 30° between adjacent cutting plates in different granulation units.

[0015] Optionally, the two sides of the shearing and extrusion section that are not connected to the shearing connection section are both blade-shaped.

[0016] Optionally, the angle between the shearing and extrusion section and the shearing connection section is greater than 90° and less than 180°.

[0017] Optionally, the shearing extrusion section and the shearing connection sections at both ends thereof form an integral structure.

[0018] Optionally, the shearing and extrusion section extends along the length of the rotating shaft, and the shearing and extrusion section and the two shearing connecting sections form an inverted "U" shape.

[0019] Optionally, the driving device can drive the rotating shaft to rotate along a first rotation direction and a second rotation direction, wherein the second rotation direction is opposite to the first rotation direction.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a sludge granulation device, including a granulation chamber, a granulation mechanism, and a drive device. Under the action of the drive device, the rotating shaft drives the granulation unit to rotate, causing the cutting plate to generate strong shearing force to continuously cut the sludge in the granulation chamber, thereby breaking up larger impurities in the sludge, such as fibers, hair, and straw. This reduces the risk of impurities clogging the screen and jamming the rotating shaft, thus improving the stability and efficiency of sludge granulation. Furthermore, by breaking up impurities through shearing, this sludge granulation device can operate reliably even with highly viscous, high-fiber, and high-moisture sludge, demonstrating high versatility. Additionally, when the shearing and extrusion section rotates to the screen at the bottom of the granulation chamber, it extrudes the sludge, completing the granulation process. After extrusion, the sludge has cracks on its surface and inside, improving the efficiency of subsequent sludge drying. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a front view of the sludge granulation device provided in this embodiment of the utility model (showing the granulation mechanism);

[0024] Figure 2 This is a cross-sectional view of the sludge granulation device provided in this embodiment of the utility model;

[0025] Figure 3 yes Figure 2 Enlarged view at point A;

[0026] Figure 4 This is a schematic diagram of the granulation mechanism provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 100. Granulation bin; 110. Opening; 120. Mesh screen;

[0029] 200. Granulation mechanism; 210. Rotating shaft; 220. Granulation unit; 221. Cutting plate; 2211. Shearing and extrusion section; 2212. Shearing connection section;

[0030] 300. Drive unit. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] This embodiment provides a sludge granulation device that can shear sludge and then compress it into granules, reducing the risk of equipment blockage and shutdown, thereby improving the stability and efficiency of sludge granulation.

[0036] Specifically, such as Figures 1-4 As shown, the sludge granulation device includes a granulation chamber 100, a granulation mechanism 200, and a drive device 300.

[0037] The granulation chamber 100 has an opening 110 at its upper part for sludge to enter, and a screen plate 120 at its bottom with an arc-shaped cross-section. The sludge in the granulation chamber 100 is eventually squeezed out from the screen plate 120 to achieve granulation. The granulation mechanism 200 includes a rotating shaft 210 and a granulation unit 220. The rotating shaft 210 is rotatably installed in the granulation chamber 100 along its length. The granulation unit 220 includes multiple cutting plates 221 spaced circumferentially along the rotating shaft 210. Each cutting plate 221 includes a shearing and extrusion section 2211 and a shearing connecting section 2212. The shearing and extrusion section 2211 is used to shear the sludge and squeeze it out from the screen plate 120. Both ends of the shearing and extrusion section 2211 are provided with shearing connecting sections 2212. The ends of the shearing connecting sections 2212 are connected to the outer peripheral wall of the rotating shaft 210 and are used to shear the sludge. The drive unit 300 is used to drive the rotating shaft 210 to rotate around its own axis.

[0038] When the sludge granulation device is working, sludge is input through the opening 110 of the granulation chamber 100. Simultaneously, the drive device 300 continuously drives the rotating shaft 210 to rotate. The rotation of the shaft 210 causes the cutting plate 221 to continuously shear the sludge within the granulation chamber 100, cutting larger impurities such as fibers, hair, and straw into smaller impurities. This reduces the risk of impurities clogging the screen plate 120 and jamming the rotating shaft 210, thereby improving the stability and efficiency of sludge granulation. Furthermore, by shearing and breaking down impurities, the sludge granulation device can operate reliably even with highly viscous, high-fiber, and high-moisture sludge, demonstrating high versatility. Additionally, when the shearing and extrusion section 2211 rotates to the screen plate 120 at the bottom of the granulation chamber 100, it extrudes the sludge, completing the granulation process. The sludge, after extrusion, has cracks on its surface and inside, improving the efficiency of subsequent sludge drying.

[0039] Optionally, the drive device 300 can drive the rotating shaft 210 to rotate along a first rotation direction and a second rotation direction, the second rotation direction being opposite to the first rotation direction. With this configuration, when the rotating shaft 210 is stuck while rotating along the first rotation direction, the drive device 300 can release the jam by controlling the rotating shaft 210 to rotate along the second rotation direction, thereby avoiding machine downtime and improving sludge granulation efficiency.

[0040] Optionally, in one possible embodiment, the drive device 300 includes a motor, a drive sprocket, a driven sprocket, and a transmission chain. The output end of the motor is connected to the drive sprocket to drive its rotation. One end of the rotating shaft 210 rotatably passes through the side wall of the granulation chamber 100 and is connected to the driven sprocket. The transmission chain is wound between the drive sprocket and the driven sprocket. With this configuration, the rotation of the rotating shaft 210 can be achieved simply by driving the motor, resulting in a simple structure and smooth force transmission.

[0041] Optionally, in one possible embodiment, the discharge hole on the screen 120 is a circular hole with a diameter of 0.5cm-2cm. Exemplarily, the diameter of the circular hole can be 0.5cm, 1cm, 1.5cm, or 2cm, etc., and can be set according to actual needs. This application does not impose a specific limitation.

[0042] Further, see also Figure 3 The angle α between the shearing and extrusion section 2211 and the tangent of the screen plate 120 is 15°-20°, and one side of the shearing and extrusion section 2211 can slide and adhere to the screen plate 120. This configuration makes the angle α between the shearing and extrusion section 2211 and the tangent of the screen plate 120 form a sludge extrusion angle. This angle is highly adaptable to sludge with different moisture contents, and the sludge formed after extrusion is easier to dewater, simple to operate, and has an extremely low failure rate.

[0043] For example, the included angle α between the shearing and extrusion section 2211 and the tangent of the mesh plate 120 can be 15°, 16°, 17°, 18°, 19° or 20°, etc., which can be set according to actual needs, and this application does not make specific limitations.

[0044] Optionally, in one possible embodiment, multiple cutting plates 221 of the same granulation unit 220 are arranged at equal intervals along the circumference of the rotation axis 210. This arrangement facilitates assembly and analysis of the sludge cutting effect.

[0045] Optionally, the same granulation unit 220 may include six cutting plates 221, which are arranged at 60° intervals along the circumferential direction of the rotation axis 210. The same granulation unit 220 may also include four cutting plates 221, which are arranged at 90° intervals along the circumferential direction of the rotation axis 210.

[0046] Further, see also Figure 4 The rotating shaft 210 is equipped with multiple granulation units 220, which are arranged adjacent to each other along the axial direction of the rotating shaft 210. The cutting plates 221 in adjacent granulation units 220 are staggered. By setting multiple granulation units 220 and staggering the cutting plates 221 of adjacent granulation units 220, the torque is uniform during the sludge extrusion process, effectively reducing the risk of deformation of the cutting plates 221 during high-speed operation. At the same time, it also helps to make the sludge particles extruded uniform in size.

[0047] Optionally, see [link to relevant documentation] Figure 4 In one possible embodiment, each granulation unit 220 is provided with six cutting plates 221, which are equally spaced along the circumference of the rotating shaft 210, and adjacent cutting plates 221 in different granulation units 220 are staggered by 30°.

[0048] In other possible embodiments, the number of cutting plates 221 in each granulation unit 220 and the angle between adjacent cutting plates 221 in adjacent granulation units 220 can also be set to other values, which can be set according to actual needs. This application does not make any specific limitations.

[0049] Furthermore, the two sides of the shearing and extrusion section 2211 that are not connected to the shearing connection section 2212 can be set to be blade-shaped to improve the shearing effect of the shearing and extrusion section 2211 on impurities in the sludge.

[0050] Furthermore, the shearing and extrusion section 2211 extends along the length of the rotating shaft 210, and the shearing and extrusion section 2211 and the two shearing connecting sections 2212 form an inverted "U" shape. The structure is simple, easy to process and assemble, and the shearing effect is good.

[0051] Optionally, in one possible embodiment, the included angle between the shearing and pressing section 2211 and the shearing connecting section 2212 is greater than 90° and less than 180°. This configuration results in higher structural stability and reduces the risk of deformation of the cutting plate 221 when shearing sludge.

[0052] Optionally, in one possible embodiment, the shearing and extrusion section 2211 and the shearing connection sections 2212 at both ends thereof constitute an integral structure. For example, the two ends of the shearing and extrusion section 2211 can be bent to form the shearing connection sections 2212. This arrangement facilitates processing and assembly and improves the reliability of the connection between the shearing and extrusion section 2211 and the shearing connection sections 2212.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A sludge granulation device, characterized in that, include: A granulation bin (100) is provided with an opening (110) at the top for sludge to enter, and a mesh plate (120) is provided at the bottom of the granulation bin (100), the cross section of which is arc-shaped. The granulation mechanism (200) includes a rotating shaft (210) and a granulation unit (220). The rotating shaft (210) is rotatably installed in the granulation chamber (100) along the length direction of the granulation chamber (100). The granulation unit (220) includes a plurality of cutting plates (221) spaced circumferentially along the rotating shaft (210). The cutting plate (221) includes a shearing and extrusion section (2211) and a shearing and connecting section (2212). The shearing and extrusion section (2211) is used to shear sludge and extrude sludge from the mesh plate (120). Both ends of the shearing and extrusion section (2211) are provided with the shearing and connecting section (2212). The end of the shearing and connecting section (2212) is connected to the outer peripheral wall of the rotating shaft (210) and is used to shear sludge. A drive device (300) is used to drive the rotating shaft (210) to rotate about its own axis.

2. The sludge granulation device according to claim 1, characterized in that, The angle between the shearing and extrusion section (2211) and the tangent of the mesh plate (120) is 15°-20°, and one side of the shearing and extrusion section (2211) can slide and adhere to the mesh plate (120).

3. The sludge granulation device according to claim 1, characterized in that, Multiple cutting plates (221) of the same granulation unit (220) are arranged at equal intervals along the circumference of the rotating shaft (210).

4. The sludge granulation device according to claim 1, characterized in that, The rotating shaft (210) is provided with a plurality of granulation units (220), which are arranged adjacent to each other along the axial direction of the rotating shaft (210), and the cutting plates (221) in two adjacent granulation units (220) are staggered.

5. The sludge granulation device according to claim 4, characterized in that, Each granulation unit (220) is provided with six cutting plates (221), which are equally spaced along the circumference of the rotating shaft (210) and are staggered by 30° between adjacent cutting plates (221) in different granulation units (220).

6. The sludge granulation device according to claim 1, characterized in that, Both sides of the shearing and extrusion section (2211) that are not connected to the shearing connection section (2212) are blade-shaped.

7. The sludge granulation device according to claim 1, characterized in that, The angle between the shearing and extrusion section (2211) and the shearing connection section (2212) is greater than 90° and less than 180°.

8. The sludge granulation apparatus according to any one of claims 1-7, characterized in that, The shearing and extrusion section (2211) and the shearing connection sections (2212) at both ends thereon constitute an integral structure.

9. The sludge granulation apparatus according to any one of claims 1-7, characterized in that, The shearing and extrusion section (2211) extends along the length direction of the rotating shaft (210), and the shearing and extrusion section (2211) and the two shearing connection sections (2212) form an inverted "U" shape.

10. The sludge granulation apparatus according to any one of claims 1-7, characterized in that, The driving device (300) can drive the rotating shaft (210) to rotate along a first rotation direction and a second rotation direction, wherein the second rotation direction is opposite to the first rotation direction.

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