Dehydration device for processing bulk organic waste

Abstract

The present invention relates to a dewatering device for treating large quantities of organic waste, comprising a device body in the shape of a cone, the device body being assembled on the outside of an extrusion screw with a compression ratio, an anti-slip strip and a dewatering screen plate being detachably mounted on the inner wall of the device body, the anti-slip strip having an extrusion surface inclined in the direction of rotation of the extrusion screw, the extrusion surface forming an anti-slip angle α with the plate surface of the dewatering screen plate, an angle β formed between the extrusion surface and the axial cross-section of the device body, a plurality of inclined first screen holes being provided on the dewatering screen plate, the first screen holes being inclined in the forward direction of the extruded material inside the device body, a plurality of second screen holes being provided on the device body, the axes of the first screen holes forming an angle γ with the axes of the second screen holes. The dewatering device designed for treating large quantities of organic waste by the present invention, by adopting a structural design of inclined screen holes, not only improves the dewatering effect and screening accuracy, prevents clogging, but also ensures smooth drainage.

Description

Technical Field

[0001] The present invention relates to the technical field of dehydration devices, in particular to a dehydration device for processing large amounts of organic waste. Background Art

[0002] Existing technology requires that after wet preparation and gravity dehydration of bulk organic waste, further extrusion dehydration is performed to maximize the dryness of the raw material. This is crucial for the subsequent steam pretreatment process, reducing the amount of steam used and increasing the concentration of chemicals in the raw material, thereby enhancing the reaction efficiency. Currently, gravity dehydration can increase the raw material concentration from 3%-5% to 10%-40%. Extrusion dehydration can increase the dryness of agricultural straw to 40%-42%, and wood to 50%-60%. Efficient extrusion can significantly reduce the amount of moisture carried over into the steaming process, thereby reducing energy consumption and waste liquid generation.

[0003] However, after long-term use, the existing extrusion dehydration system's dehydration screen plates experience increased inner diameter and wear due to intense friction, reducing the compression ratio and rendering dehydration performance ineffective. Replacing the entire dehydration housing is expensive. Furthermore, the screen plate's vertical holes are prone to clogging, reducing transfer efficiency.

[0004] Therefore, it is urgent to develop a new type of extrusion dehydration device structure to enable rapid replacement of key vulnerable parts, thereby reducing maintenance costs and frequency, and ensuring the dehydration effect and life of the device. This not only reduces maintenance expenses, but also ensures energy conservation in the cooking process and improves the overall economic benefits of the treatment system. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a dehydration device for treating large amounts of organic waste, which not only improves the dehydration effect and screening accuracy, prevents clogging, but also ensures smooth drainage.

[0006] In order to achieve the above-mentioned purpose, the dehydration device designed by the present invention for treating large amounts of organic waste includes a device body in the shape of a cone, the device body is assembled on the outside of an extrusion spiral with a compression ratio, the cone angle of the device body matches the cone angle of the extrusion spiral, and an anti-slip strip and a dehydration screen plate are detachably installed on the inner wall of the device body, the anti-slip strip and the dehydration screen plate are both arranged along the axial direction of the device body, the anti-slip strip has an extrusion surface inclined in the direction of rotation of the extrusion spiral, the extrusion surface and the plate surface of the dehydration screen plate form the anti-slip angle α, the extrusion An angle β is formed between the pressing surface and the axial cross-section of the device body. The dewatering screen plate is provided with a plurality of inclined first sieve holes, which are inclined toward the forward direction of the material extruded inside the device body. The device body is provided with a plurality of second sieve holes, which are respectively connected to each first sieve hole; the aperture of the second sieve hole is larger than the aperture of the first sieve hole, and a step is formed between the second sieve hole and the first sieve hole; the axis of the second sieve hole is perpendicular to the inner wall of the device body, and the axis of the first sieve hole forms an angle γ with the axis of the second sieve hole.

[0007] In order to achieve excellent anti-slip effect, the anti-slip angle α is an obtuse angle.

[0008] A further solution is that an angle β is formed between the extrusion surface and the axial cross section of the device body, the anti-slip angle α is 101°-105°, and the angle β is 34°-36°.

[0009] In order to reduce the possibility of blockage and jamming of the extruded material, the angle γ is 55°-65°.

[0010] In order to ensure a good squeezing effect of the squeezing screw, the gap between the outer surface of the anti-slip strip and the squeezing screw is smaller than the gap between the dewatering screen plate surface and the squeezing screw.

[0011] To facilitate maintenance and repair, the device body includes an upper half and a lower half, and corresponding positioning holes and screw holes are provided on the outer walls of the upper half and the lower half. The upper half and the lower half are positioned by positioning pins passing through the positioning holes, and are fixedly connected by bolts passing through the screw holes.

[0012] In order to increase the opening rate, adjacent first sieve holes on each dewatering sieve plate are staggered.

[0013] In order to simplify maintenance and replacement, the anti-slip strips and dehydration screen plates are provided in plurality, and the plurality of anti-slip strips and dehydration screen plates are arranged at intervals along the circumference of the device body, and the inner wall of the device body is provided with mounting grooves along its axial direction that are compatible with the anti-slip strips and dehydration screen plates. The anti-slip strips and dehydration screen plates are placed in the corresponding mounting grooves, and the edges of the anti-slip strips and dehydration screen plates have a smooth transition with the inner wall of the device body.

[0014] A further solution is that the anti-slip strips and the dehydration screen plate are detachably connected to the device body through any one of a welding structure, a screw structure, a snap structure, and a slot matching structure.

[0015] The dehydration device designed by the present invention for treating large amounts of organic waste adopts a structural design of oblique sieve holes, which not only improves the dehydration effect and screening accuracy, prevents blockage, but also ensures smooth drainage; at the same time, the optimized anti-slip strips enhance the stable transfer of materials; the detachable design of vulnerable parts such as sieve plates and anti-slip strips greatly reduces the cost of maintenance and replacement, and extends the service life of the device. It is suitable for the pretreatment of large amounts of organic waste, and while reducing operating costs, it also improves the comprehensive utilization value of the waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the use state of Example 1 of the present invention;

[0017] Figure 2 is a structural diagram of embodiment 1 of the present invention;

[0018] Figure 3 is a schematic diagram from another perspective of embodiment 1 of the present invention;

[0019] Figure 4 yes Figure 3 The enlarged schematic diagram of point D in the middle;

[0020] Figure 5 yes Figure 2 The enlarged schematic diagram of point B in the middle;

[0021] Figure 6 yes Figure 2 Schematic diagram of the structure from the perspective of direction A;

[0022] Figure 7 yes Figure 3 Schematic diagram of the structure from the C direction perspective.

[0023] Among them: device body 1, anti-slip strip 2, dehydration screen plate 3, first screen hole 4, second screen hole 5, step part 6, extrusion surface 7, installation groove 8, positioning pin 9, bolt 10, upper half 11, lower half 12. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] Example 1.

[0026] like Figure 1-7As shown, the dehydration device for treating large amounts of organic waste described in this embodiment includes a device body 1 in the shape of a cone, and the device body 1 is assembled on the outside of an extrusion screw with a compression ratio. The cone angle of the device body 1 matches the cone angle of the extrusion screw. An anti-slip strip 2 and a dehydration screen plate 3 are detachably mounted on the inner wall of the device body 1. The anti-slip strip 2 and the dehydration screen plate 3 are both arranged along the axial direction of the device body 1. The anti-slip strip 2 has an extrusion surface 7 inclined in the direction of rotation of the extrusion screw. The extrusion surface 7 forms the anti-slip angle α with the plate surface of the dehydration screen plate 3. The extrusion surface 7 and the device body are arranged in the axial direction of the extrusion screw. An angle β is formed between the axial cross-sections of the device body 1, and a plurality of inclined first sieve holes 4 are provided on the dewatering sieve plate 3. The first sieve holes 4 are inclined toward the forward direction of the extruded material inside the device body 1. The device body 1 is provided with a plurality of second sieve holes 5, and the plurality of second sieve holes 5 are respectively connected to the first sieve holes 4; the aperture of the second sieve holes 5 is larger than the aperture of the first sieve holes 4, and a step 6 is formed between the second sieve holes 5 and the first sieve holes 4; the axis of the second sieve hole 5 is perpendicular to the inner wall of the device body 1, and the axis of the first sieve hole 4 forms an angle γ with the axis of the second sieve hole 5.

[0027] like Figure 1 As shown, the dehydration device (device body 1) provided in this embodiment is assembled on the outside of the extrusion screw 100 of the bulk organic waste wet preparation equipment, and its cone angle matches the cone angle of the extrusion screw 100. When working, as shown in FIG. Figure 2-5 As shown, the extrusion screw 100 starts to run, pushing the bulk organic waste material forward along the axial direction of the device body 1, and the extrusion surface 7 forms an anti-slip angle α with the plate surface of the dewatering screen plate 3, so that when the material spirally advances in the device body 1 under the drive of the extrusion screw 100, the resistance and friction area it can encounter in the device body 1 with a rated space volume are increased, thereby effectively preventing the material with a large water content from slipping during dehydration. Then, as the extrusion screw 100 continues to run, due to the existence of the device body 1, the extrusion force on the dewatering screen plate 3 gradually increases. Since the first screen hole 4 is facing the material, the material is squeezed on the dewatering screen plate 3. The forward direction of the material is inclined, which avoids the first sieve hole 4 from being directly aligned with the material, and reduces the possibility of the material being directly squeezed into the first sieve hole 4 and causing blockage. At the same time, since water is a fluid and can flow in all directions, the extracted water can be discharged through the first sieve hole 4 without hindrance. Even if a small amount of impurities are brought into the extracted water, since the material is relatively compact when squeezed, the impurities will not enter the first sieve hole 4 and will be carried away by the forward material, thereby reducing the solid content in the extrudate. Finally, the squeezed water is discharged from a plurality of second sieve holes 5 connected to the first sieve hole 4 opened on the device body 1, ensuring smooth drainage.

[0028] Specifically, the anti-slip strip 2 has an extrusion surface 7 that is tilted toward the direction of rotation of the extrusion spiral. The extrusion surface 7 forms the anti-slip angle α with the plate surface of the dewatering screen plate 3. Utilizing this structure, the extrusion surface 7 forms a specific angle with the plate surface of the dewatering screen plate 3, namely the anti-slip angle α. When the material is extruded through the anti-slip angle α, it will be additionally squeezed by the extrusion surface 7. This helps to increase the resistance and friction area encountered by the material as the spiral advances, preventing the material from sliding or slipping during the dehydration process, and enhancing the stable transfer of the material. In this embodiment, in order to achieve a superior anti-slip effect, the anti-slip angle α is an obtuse angle, and an angle β is formed between the extrusion surface 7 and the axial cross-section of the device body 1. The anti-slip angle α is 101°-105°, and the angle β is 34°-36°.

[0029] It should be noted that the anti-slip angle α is set to an obtuse angle rather than a right angle or an acute angle. This is because: if the anti-slip angle α is an acute angle, when the extrusion screw 100 rotates, the anti-slip strip 2 will have an overly strong cutting effect, that is, the cutting effect on the extruded material is greater than the anti-slip effect. If the anti-slip angle α is a right angle, then as the working time continues to advance, the cut and extruded material will fill the "groove" formed by the anti-slip angle α, which directly leads to the rapid weakening of the anti-slip ability of the anti-slip strip 2 and seriously affects the feeding. Therefore, the anti-slip angle α is an obtuse angle, and an angle β is formed between the extrusion surface 7 and the axial section of the device body 1 (the straight line where the diameter of the radial section of the device body 1 is located), which means that the extrusion surface 7 and the dehydration A larger angle (anti-slip angle α) is formed between the surfaces of the sieve plates 3. Take the conventional φ635mm (large end diameter) extrusion screw 100 as an example: its "groove" depth is generally 16mm. For every 2° increase in this angle (anti-slip angle α), its "groove" is about 3.9mm shallower. For every 4° increase, the "groove" becomes half the designed depth, which has a serious impact on anti-slip. Therefore, the angle of the groove is quite sensitive. Therefore, in this embodiment, the angle of the anti-slip angle α is preferably 103°, and the angle of the included angle β is preferably 35°. On the one hand, it ensures that the anti-slip angle α will not be too large and cause the "groove" to become shallower. On the other hand, it avoids the problem that the anti-slip performance of the equipment is greatly weakened due to wear. In summary, the angle parameter setting of the anti-slip angle α and the included angle β fully considers and balances many factors, ensuring that the accurate angle setting of the anti-slip angle α can provide sufficient resistance when extruding the material, and effectively avoids the material from being stuck in the "groove" (anti-slip angle α), maintaining a stable feeding capacity.

[0030] At the same time, the axis of the second sieve hole 5 is perpendicular to the inner wall of the device body 1, and the axis of the first sieve hole 4 forms an angle γ with the axis of the second sieve hole 5. In this embodiment, the angle γ is 55°-65°. Thus, because the axis of the second sieve hole 5 is perpendicular to the inner wall of the device body 1, the axis of the first sieve hole 4 forms an angle γ with the axis of the second sieve hole 5. This ensures that the inclination angle of all the first sieve holes 4 on the dewatering screen plate 3 relative to the inner wall of the device body 1 is consistent, ensuring uniform force on the extruded material during the dewatering process, and avoiding uneven extrusion and possible instability during the dewatering process. It should be noted that the higher the degree of consistency between the opening direction of the first sieve hole 4 and the forward direction of the material, the less likely the debris or impurities in the extrudate or extruded material will enter the first sieve hole 4 and cause blockage, that is, the larger the angle γ, the smoother the material advances. However, the larger the angle γ, the narrower the corresponding first sieve hole 4 will become, that is, the longer the water flow path of the extrudate will be. At the same time, the processing of the first sieve hole 4 will also be more difficult. Assume that the relationship between the flow path length L and the thickness δ of the dehydration screen plate 3 and the angle γ is as follows: L = δ / COS (γ). When the thickness of the dehydration screen plate 3 is 5 mm, the relationship between the flow path length L and the angle γ is as follows:

[0031]

[0032] In summary, in this embodiment, the angle γ is preferably 60°, and the flow channel length L is twice the thickness of the dewatering screen plate 3, which strikes a balance between the clogging risk and the processing difficulty factor, and is the parameter with the best overall performance.

[0033] Furthermore, the aperture of the second sieve aperture 5 is larger than that of the first sieve aperture 4, and a step 6 is formed between the second sieve aperture 5 and the first sieve aperture 4. This allows the aperture of the first sieve aperture 4 to be set within a smaller range, suitable for initial dehydration and screening operations, while the larger aperture of the second sieve aperture 5 allows more water to pass through, accelerating the removal process. The step 6 formed between the two helps to form a gradually increasing channel in the drainage path, prompting water to leave the extruded material more quickly. The anti-slip strip 2 and dehydration screen plate 3 are detachable from the device body 1, allowing for easy installation and replacement, thereby reducing maintenance costs and frequency and extending the device life.

[0034] Example 2.

[0035] The dehydration device for treating large amounts of organic waste provided in this embodiment is based on Example 1. Figure 3 and Figure 4As shown, in order to ensure a good extrusion effect of the extrusion screw 100, the gap between the outer surface of the anti-slip strip 2 and the extrusion screw is smaller than the gap between the plate surface of the dewatering screen plate 3 and the extrusion screw 100. Driven by the extrusion screw 100, the material mainly contacts the extrusion surface 7 of the anti-slip strip 2, forming an extrusion force on the material and exerting a dehydration effect, while the dewatering screen plate 3 is mainly used to discharge the extrusion liquid, and the gap between the plate surface of the dewatering screen plate 3 and the extrusion screw 100 is larger than the gap between the outer surface of the anti-slip strip 2 and the extrusion screw 100, so that the extrusion force is more concentrated on the extrusion surface 7 of the anti-slip strip 2, thereby improving the dehydration effect. This differentiated gap setting matches the different functions of the two components, reasonably divides the functions, avoids the functional overlap of the two, and simplifies the design without the need to over-adjust the gap between the two components.

[0036] In some embodiments, as Figure 6 As shown, to facilitate maintenance and repair, the device body 1 includes an upper half 11 and a lower half 12. Matching positioning holes and screw holes are provided on the outer walls of the upper half 11 and the lower half 12. The upper half 11 and the lower half 12 are positioned by positioning pins 9 extending through the positioning holes and are fixedly connected by bolts 10 extending through the screw holes. In this embodiment, the positioning pins 9 achieve pre-positioning of the upper half 11 and the lower half 12, ensuring positioning accuracy. The bolts 10 secure the connection, making the assembly of the upper half 11 and the lower half 12 more secure and reliable, and achieving a detachable connection between the upper half 11 and the lower half 12, facilitating maintenance and repair of internal components.

[0037] In some embodiments, to increase the opening ratio, adjacent first sieve holes 4 on each dewatering sieve plate 3 are staggered. The staggered arrangement can increase the total opening area of ​​the dewatering sieve plate 3, improving dewatering efficiency while ensuring mechanical strength. It is understood that the opening arrangement of the second sieve holes 5 remains consistent with that of the first sieve holes 4.

[0038] In some embodiments, as Figure 3 and Figure 4As shown, to simplify maintenance and replacement, multiple anti-slip strips 2 and dewatering screen plates 3 are provided. These multiple anti-slip strips 2 and dewatering screen plates 3 are arranged at intervals along the circumference of the device body 1, and mounting grooves 8 that are compatible with the anti-slip strips 2 and dewatering screen plates 3 are provided on the inner wall of the device body 1 along its axial direction. The anti-slip strips 2 and dewatering screen plates 3 are placed in the corresponding mounting grooves 8, and the edges of the anti-slip strips 2 and dewatering screen plates 3 have a smooth transition to the inner wall of the device body 1. In this embodiment, six anti-slip strips 2 and dewatering screen plates 3 are provided. This structure realizes the multi-section arrangement of the anti-slip strips 2 and dewatering screen plates 3, axially separated, and expands the effective area. Operators can quickly identify and address problems in specific areas, improving maintenance efficiency. The matching mounting grooves 8 realize precise positioning and rapid disassembly and assembly of components, reducing the time and difficulty of replacement operations. The smooth transition design helps to avoid unnecessary friction or obstruction of materials during transfer, which not only reduces additional energy consumption but also helps maintain the stable operation of the system.

[0039] In some embodiments, the anti-slip strip 2 and the dewatering screen plate 3 are detachably connected to the device body 1 by any one of a welding structure, a screw structure, a snap structure, and a slot matching structure. In this embodiment, different connection methods can be selected according to specific circumstances and requirements to meet specific working environments and usage conditions. For example, different connection methods are selected according to the degree of wear and the replacement cycle of the anti-slip strip 2 and the dewatering screen plate 3: because the distance between the anti-slip strip 2 and the extrusion spiral 100 is the smallest and more susceptible to wear, the anti-slip strip 2 and the device body 1 are connected by a screw structure, which makes it easier to disassemble and replace the anti-slip strip 2, reducing the difficulty and time of the replacement operation. For the dewatering screen plate 3, due to its relatively small wear, the use of a welding structure can ensure that it is firmly fixed. During disassembly, the dewatering screen plate 3 can be easily disassembled after the weld is ground off with an angle grinder.

[0040] The dehydration device provided in this embodiment for treating large amounts of organic waste adopts a structural design with oblique sieve holes, which not only improves the dehydration effect and screening accuracy, prevents blockage, but also ensures smooth drainage; at the same time, the optimized anti-slip strips enhance the stable transfer of materials; the detachable design of wearing parts such as sieve plates and anti-slip strips greatly reduces the maintenance and replacement costs and extends the service life of the device. It is suitable for the pretreatment of large amounts of organic waste, and while reducing operating costs, it also improves the comprehensive utilization value of the waste.

[0041] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dehydration device for treating large amounts of organic waste, comprising a conical device body (1), the device body (1) being mounted on the outside of an extrusion screw with a compression ratio, wherein: The cone angle of the device body (1) matches the cone angle of the extrusion spiral. The inner wall of the device body (1) is detachably provided with an anti-slip strip (2) and a dewatering screen plate (3). The anti-slip strip (2) and the dewatering screen plate (3) are both arranged along the axial direction of the device body (1). The anti-slip strip (2) has an extrusion surface (7) inclined in the direction of rotation of the extrusion spiral. The extrusion surface (7) forms an anti-slip angle α with the plate surface of the dewatering screen plate (3). An included angle β is formed between the extrusion surface (7) and the axial section of the device body (1). The dewatering screen plate (3) is provided with a plurality of inclined arrangements. The first sieve hole (4) is inclined toward the forward direction of the extruded material inside the device body (1); the device body (1) is provided with a plurality of second sieve holes (5), and the plurality of second sieve holes (5) are respectively connected to the first sieve holes (4); the aperture of the second sieve hole (5) is larger than the aperture of the first sieve hole (4), and a step portion (6) is formed between the second sieve hole (5) and the first sieve hole (4); the axis of the second sieve hole (5) is perpendicular to the inner wall of the device body (1), and the axis of the first sieve hole (4) forms an angle γ with the axis of the second sieve hole (5); The anti-slip angle α is an obtuse angle; the gap between the outer surface of the anti-slip strip (2) and the extrusion spiral is smaller than the gap between the plate surface of the dewatering screen plate (3) and the extrusion spiral; the adjacent first sieve holes (4) on each dewatering screen plate (3) are staggered; the anti-slip strip (2) and the dewatering screen plate (3) are correspondingly provided with a plurality of anti-slip strips (2) and dewatering screen plates (3), and the plurality of anti-slip strips (2) and dewatering screen plates (3) are respectively arranged at intervals along the circumference of the device body (1), and the inner wall of the device body (1) is provided with a mounting groove (8) adapted to the anti-slip strip (2) and the dewatering screen plate (3) along its axial direction, and the anti-slip strip (2) and the dewatering screen plate (3) are placed in the corresponding mounting groove (8), and the edges of the anti-slip strip (2) and the dewatering screen plate (3) are smoothly transitioned to the inner wall of the device body (1).

2. The dehydration device for treating large amounts of organic waste according to claim 1, wherein: The anti-slip angle α is 101°-105°, and the included angle β is 34°-36°.

3. The dehydration device for treating large amounts of organic waste according to claim 1, wherein: The angle γ is 55°-65°.

4. The dehydration device for treating large amounts of organic waste according to claim 1, wherein: The device body (1) comprises an upper half (11) and a lower half (12), and the outer walls of the upper half (11) and the lower half (12) are provided with matching positioning holes and screw holes. The upper half (11) and the lower half (12) are positioned by positioning pins (9) passing through the positioning holes, and are fixedly connected by bolts (10) passing through the screw holes.

5. The dehydration device for treating large amounts of organic waste according to claim 1, wherein: The anti-slip strip (2) and the dewatering screen plate (3) are detachably connected to the device body (1) through any one of a welding structure, a screw connection structure, a snap-fit ​​structure, and a slot matching structure.

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