A woven filter belt and high pressure belt press
By using a woven filter belt design, and combining a skeleton structure with a microporous structure, the problem of solid material loss in high-pressure belt dewatering machines is solved, achieving efficient sludge dewatering and low-cost treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LINGXIAO ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-07
AI Technical Summary
Existing high-pressure belt dewatering machines have limited ability to retain fine sludge particles, resulting in significant loss of solid matter, reduced dewatering efficiency, and increased subsequent treatment load and environmental pollution risks.
The filter belt adopts a woven design. The first monofilament forms a skeleton structure, and the second monofilament and multifilament are arranged in the skeleton holes along the weft direction to form large pores for rapid discharge of free water. The multifilament forms micropores to trap solid particles. Combined with polyethylene terephthalate monofilament to provide strength and polypropylene monofilament to provide corrosion resistance, the filter belt's strength and trapping accuracy are improved.
It improves sludge dewatering efficiency, reduces solid particle loss, lowers filtrate treatment load and cost, ensures filter belt shape stability and air permeability under high pressure, and achieves a solid recovery rate of over 95%.
Smart Images
Figure CN224462381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dewatering equipment technology, and in particular to a woven filter belt and a high-pressure belt dewatering machine. Background Technology
[0002] In the field of deep sludge dewatering, high-pressure belt dewatering technology has become a core process for sludge dewatering due to its advantages of continuous operation, low energy consumption, and large-scale application. Utilizing high-pressure belt dewatering technology can significantly reduce the water content in wastewater and significantly improve the volume reduction effect.
[0003] However, existing high-pressure belt dewatering machines generally use monofilament woven filter belts. In actual operation, the existing filter belts have limited ability to retain fine sludge particles, resulting in the loss of solid matter with the filtrate during the dewatering process. This reduces dewatering efficiency and increases the load on subsequent treatment and the risk of environmental pollution.
[0004] The performance of existing filter belts has become a key bottleneck restricting the improvement of the quality and efficiency of high-pressure belt dewatering technology. Therefore, providing a filter belt with high solid recovery rate is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] This utility model discloses a woven filter belt and a high-pressure belt dewatering machine to solve the technical problem of serious solid material loss in high-pressure belt dewatering machines in related technologies.
[0006] To solve the above problems, the present invention adopts the following technical solution:
[0007] The first aspect of this utility model provides a woven filter belt.
[0008] The woven filter belt of this utility model includes a first monofilament, which is arranged along the warp direction. Two adjacent first monofilaments are woven together to form a skeleton structure, and the skeleton structure has skeleton holes. The woven filter belt also includes a second monofilament and a multifilament, which are arranged along the weft direction. The second monofilament and the multifilament are located in the skeleton holes and are spaced apart.
[0009] According to one optional implementation, one to four multifilaments are provided between two adjacent second monofilaments.
[0010] According to an optional embodiment, a multifilament is provided between two adjacent second monofilaments, and the distance between two adjacent multifilaments is less than the diameter of the second monofilament, and / or, the distance between two adjacent second monofilaments is less than the diameter of the multifilament.
[0011] According to an optional embodiment, the distance between two adjacent multifilaments is 50~150μm; and / or, the distance between two adjacent second monofilaments is 50~150μm.
[0012] According to one optional embodiment, the second monofilament has 1 layer and the multifilament has 1 layer along the thickness direction of the woven filter belt; or, the second monofilament has 1 to 5 layers and the multifilament has 1 to 5 layers along the thickness direction of the woven filter belt.
[0013] According to an optional implementation, adjacent layers of the second monofilament and / or the multifilament are staggered along the thickness direction of the woven filter tape.
[0014] According to an optional embodiment, the multifilament comprises a plurality of monofilaments, and the fineness of the monofilaments is less than or equal to 1.5 dtex, the multifilament being 300-500 denier; and / or, the diameter of the first monofilament is 0.4-0.6 mm; and / or, the diameter of the second monofilament is 0.6-0.7 mm.
[0015] According to an optional embodiment, the monofilament is a polypropylene monofilament; and / or, the first monofilament is a polyethylene terephthalate monofilament; and / or, the second monofilament is a polyethylene terephthalate monofilament.
[0016] According to one optional embodiment, the pore diameter of the skeleton pore is 150~300μm.
[0017] The second aspect of this utility model provides a high-pressure belt dehydrator.
[0018] The high-pressure belt dewatering machine of this utility model includes the woven filter belt described in any of the technical solutions of this utility model.
[0019] The technical solution adopted in this utility model can achieve the following beneficial effects:
[0020] The woven filter belt of this invention has a first monofilament arranged along the warp direction to form a skeleton structure, and a second monofilament and multifilament arranged along the weft direction within the skeleton holes of the skeleton structure. Slightly larger pores can be formed between the second monofilament and multifilament, and between the first monofilament and the second monofilament and multifilament, allowing a large amount of free water to be quickly discharged through these pores, thus improving treatment efficiency. Meanwhile, micropores can be formed inside the multifilament, which can trap solid particles, reducing the number of solid particles that penetrate the filter belt and enter the filtrate, thereby reducing the treatment load and cost of the filtrate. This invention solves the technical problem of severe solid loss in high-pressure belt dewatering machines in related technologies.
[0021] On the other hand, the woven filter belt of this invention needs to withstand huge tension and extrusion pressure applied by the rollers during use. The first monofilament forms a skeleton structure to provide sufficient strength in the warp direction of the woven filter belt. The high warp strength (along the roller running direction) can provide basic protection against the filter belt being pulled apart or excessively elongated. In the weft direction, the second monofilament can also provide sufficient weft strength for the filter belt. The first and second monofilaments work together to maintain the stability of the pores of the woven filter belt, so as to maintain the stable air permeability and interception accuracy of the woven filter belt and avoid problems such as pore collapse and uneven pore size reduction under high pressure. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0023] Figure 1 This is a schematic diagram of the skeleton structure of the woven filter tape according to an embodiment of this application;
[0024] Figure 2 This is a first schematic cross-sectional view of the woven filter tape according to an embodiment of this application;
[0025] Figure 3 This is a second schematic cross-sectional view of the woven filter tape according to an embodiment of this application;
[0026] Figure 4 This is a schematic diagram of the multifilament in an embodiment of this application;
[0027] Figure 5 This is a cross-sectional schematic diagram of a woven filter tape according to another embodiment of this application;
[0028] Figure 6 This is a schematic diagram of a high-pressure belt dehydrator according to an embodiment of this application.
[0029] In the diagram: 110, first monofilament; 120, skeleton hole; 130, second monofilament; 140, multifilament; 141, single fiber. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0031] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0032] High-pressure belt dewatering machines in related technologies generally use monofilament woven filter belts. In actual operation, the filter belts have limited ability to retain fine sludge particles, resulting in the loss of solid matter with the filtrate during the dewatering process. This reduces dewatering efficiency and increases the load on subsequent treatment and the risk of environmental pollution.
[0033] Therefore, this application provides a woven filter belt and a high-pressure belt dewatering machine. The woven filter belt includes a first monofilament arranged along the warp direction. Adjacent first monofilaments are woven together to form a skeleton structure with skeleton holes. The woven filter belt also includes second monofilaments and multifilaments arranged along the weft direction. The second monofilaments and multifilaments are located within the skeleton holes and are spaced apart. The woven filter belt of this application can form slightly larger pores between the second monofilaments and multifilaments, and between the first monofilaments and the second monofilaments and multifilaments. A large amount of free water can be quickly discharged through these pores, improving the treatment efficiency. Meanwhile, micropores can be formed inside the multifilaments, which can trap solid particles, reducing the number of solid particles that penetrate the filter belt and enter the filtrate, thereby reducing the treatment load and cost of the filtrate.
[0034] The following is in conjunction with the appendix Figures 1 to 6 The braided filter belt and high-pressure belt dewatering machine provided in this application will be described in detail through specific embodiments and application scenarios.
[0035] The woven filter tape of this embodiment includes a first monofilament 110. The first monofilament 110 is arranged along the warp direction, and adjacent first monofilaments 110 are woven together to form a skeleton structure. The skeleton structure has skeleton holes 120, such as... Figure 1 As shown. For example, the two first monofilaments 110 intersect each other and form a skeletal structure, as... Figure 1 As shown. For example, in this embodiment, the warp direction refers to the direction of roller travel.
[0036] For example, the aperture of the skeleton hole 120 is 150~300μm. For instance, the aperture of the skeleton hole 120 may be 150μm, 200μm, 250μm, or 300μm. However, it is not limited to this; the aperture of the skeleton hole 120 may also be set to other sizes based on usage requirements. The aperture of the skeleton hole 120 may refer to the diameter of the largest dimension within the skeleton hole 120.
[0037] For example, the first monofilament 110 is a polyethylene terephthalate (PET) monofilament. The diameter of the first monofilament 110 is 0.4~0.6 mm. In this embodiment, the first monofilament 110 is made of polyethylene terephthalate, which provides sufficient warp strength (e.g., a warp strength greater than 3000 N / cm). The skeleton structure formed by the first monofilament 110 provides sufficient mechanical strength and support to maintain the shape stability and pore structure of the filter belt under high pressure and tension. The polyethylene terephthalate monofilament also has the characteristics of low tensile strength and adaptability to dewatering machine temperature and sludge environment.
[0038] The woven filter tape of this embodiment further includes a second monofilament 130 and a multifilament 140. The second monofilament 130 and the multifilament 140 are arranged along the weft direction, located within the skeleton holes 120, and spaced apart, such as... Figure 2 and Figure 5 As shown. For example, in this embodiment, the latitudinal direction refers to a direction perpendicular to the longitudinal direction.
[0039] For example, one to four multifilaments 140 are provided between two adjacent second monofilaments 130. That is, one to four multifilaments 140 are spaced apart between two adjacent second monofilaments 130. Figure 2 A schematic diagram is shown showing that there is a multifilament 140 between two adjacent second monofilaments 130. Figure 5 A schematic diagram is shown showing that there are 3 multifilaments 140 between two adjacent second monofilaments 130.
[0040] For example, the second monofilament 130 is a polyethylene terephthalate (PET) monofilament. The diameter of the second monofilament 130 is 0.6~0.7 mm. Similar to the first monofilament 110, the second monofilament 110 in this embodiment is made of PET, which provides sufficient weft strength (e.g., warp strength greater than 3000 N / cm) and works in conjunction with the first monofilament 110 to maintain the shape stability and pore structure of the filter belt under high pressure and tension. PET monofilament also has low tensile strength and can adapt to dewatering machine temperatures and sludge environments.
[0041] For example, the multifilament 140 comprises multiple monofilaments 141, such as Figure 4As shown. Exemplarily, a pore-filled coating layer can be provided around the multiple single fibers 141. This coating layer not only constrains the multiple single fibers 141 but also filters and traps particles. However, it is not limited to this; the multiple single fibers 141 may not have a coating layer, and the binding direction can still constrain them. The fineness of the single fiber 141 is less than or equal to 1.5 dtex, and the multifilament 140 is 300-500 denier. In this embodiment, the multifilament 140 includes multiple single fibers 141, and a microporous structure can be formed between the multiple single fibers 141, which helps to trap small particles.
[0042] For example, the single fiber 141 is a polypropylene single fiber. In this embodiment, the single fiber 141 is made of polypropylene, which has excellent chemical corrosion resistance and good hydrophobicity, which is conducive to the rapid passage of water through the filter belt.
[0043] In this embodiment, the woven filter belt has a second monofilament 130 and a multifilament 140 arranged along the weft direction. This combines the high strength, high modulus, and abrasion resistance of polyethylene terephthalate monofilament with the corrosion resistance and hydrophobicity of polypropylene monofilament, so that the woven filter belt can have both high strength, high precision, and corrosion resistance.
[0044] In this embodiment, the woven filter belt has a first monofilament 110 arranged along the warp direction to form a skeleton structure, and a second monofilament 130 and a multifilament 140 arranged along the weft direction and located within the skeleton holes 120 of the skeleton structure. Slightly larger pores can be formed between the second monofilament 130 and the multifilament 140, and between the first monofilament 110 and the second monofilament 130 and the multifilament 140. A large amount of free water can be quickly discharged through these pores, improving the treatment efficiency. Micropores can be formed inside the multifilament 140, which can trap solid particles, reduce the solid particles that enter the filtrate through the filter belt, and reduce the treatment load and cost of the filtrate.
[0045] The woven filter belt in this embodiment can achieve a solid recovery rate of over 95%, solving the technical problem of severe solid loss in high-pressure belt dewatering machines in related technologies.
[0046] On the other hand, the woven filter belt of this embodiment needs to withstand huge tension and extrusion pressure applied by the rollers during use. The first monofilament 110 forms a skeleton structure to provide sufficient strength in the warp direction of the woven filter belt. The high warp strength (along the roller running direction) can provide basic protection against the filter belt being pulled apart or excessively stretched. In the weft direction, the second monofilament 130 can also provide sufficient weft strength for the filter belt. The first monofilament 110 and the second monofilament 130 work together to maintain the stability of the pores of the woven filter belt, so as to maintain the stable air permeability and interception accuracy of the woven filter belt and avoid problems such as pore collapse and uneven pore size reduction under high pressure.
[0047] In some embodiments, a multifilament 140 is provided between two adjacent second monofilaments 130. Alternatively, a second monofilament 130 is provided between two adjacent multifilaments 140. That is, the second monofilaments 130 and multifilaments 140 are arranged alternately, which can make the woven filter belt have uniform strength and retention accuracy.
[0048] In some embodiments, the distance between two adjacent multifilaments 140 is less than the diameter of the second monofilament 130, and / or, the distance between two adjacent second monofilaments 130 is less than the diameter of the multifilament 140. The distance between two adjacent multifilaments 140 is as follows: Figure 3 As shown in L1, the distance between two adjacent second monofilaments 130 is as follows: Figure 3 As shown in L2, this reduces the porosity between the second monofilament 130 and the multifilament 140, thus reducing the amount of solid particles entering the filtrate through the filter belt while ensuring sludge dewatering efficiency. For example, the distance between two adjacent multifilaments 140 is 50-150 μm; and / or, the distance between two adjacent second monofilaments 130 is 50-150 μm. This allows the woven filter belt to achieve a retention accuracy of less than 150 μm.
[0049] In some embodiments, the second monofilament 130 has 1 to 5 layers and the multifilament 140 has 1 to 5 layers along the thickness direction of the woven filter tape. Preferably, both the second monofilament 130 and the multifilament 140 have 1 layer. Figure 2 and Figure 5 A schematic diagram is shown, showing that both the second monofilament 130 and the multifilament 140 are single-layered. In this embodiment, the woven filter belt has a single-layered structure for both the second monofilament 130 and the multifilament 140, making the woven filter belt thinner and facilitating solid-liquid separation. In addition, the single-layered structure of the second monofilament 130 and the multifilament 140 also makes the pores of the woven filter belt more permeable, preventing sludge particles from being trapped between layers and causing deep blockage, making it easier to clean and maintain high air permeability and dewatering efficiency over a long period of time.
[0050] In some embodiments, adjacent layers of second monofilaments 130 and / or multifilaments 140 are staggered along the thickness direction of the woven filter tape. For example... Figure 2 and Figure 5 As shown, misalignment refers to the partial overlap of the second monofilament 130 and / or multifilament 140 in the thickness direction between two adjacent layers. Figure 2 As shown, when both the second monofilament 130 and the multifilament 140 are one layer, the thickness of the woven filter tape is less than the sum of the diameters of the second monofilament 130 and the multifilament 140.
[0051] In this embodiment, the woven filter belt has two adjacent layers of second monofilaments 130 and / or multifilaments 140 staggered along the thickness direction, which can further reduce the thickness of the woven filter belt and further improve the solid-liquid separation efficiency. On the other hand, the staggered arrangement of two adjacent layers of second monofilaments 130 and / or multifilaments 140 also helps to maintain a smaller gap between two adjacent second monofilaments 130 and / or multifilaments 140, thereby improving the filter belt's retention accuracy.
[0052] The high-pressure belt dewatering machine of this embodiment includes the woven filter belt of any of the technical solutions in this embodiment. The remaining structure of the high-pressure belt dewatering machine is the same as that of the prior art, and will not be described in detail here. Figure 6 A schematic diagram of a high-pressure belt dehydrator is shown.
[0053] The high-pressure belt dewatering machine of this embodiment has a woven filter belt according to any of the technical solutions in this embodiment, which can not only improve the dewatering efficiency, but also reduce the solid particles that enter the filtrate through the filter belt, thereby reducing the treatment load and cost of the filtrate; on the other hand, the high-pressure belt dewatering machine of this embodiment can also maintain the stability of dewatering efficiency and retention accuracy under high-pressure dewatering conditions.
[0054] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0055] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
[0056] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. A woven filter belt, characterized in that, It includes a first monofilament (110), which is arranged along the warp direction. Two adjacent first monofilaments (110) are woven together to form a skeleton structure, which has skeleton holes (120). The woven filter belt further includes a second monofilament (130) and a multifilament (140), the second monofilament (130) and the multifilament (140) are arranged along the weft direction, the second monofilament (130) and the multifilament (140) are located in the skeleton hole (120), and the second monofilament (130) and the multifilament (140) are arranged at intervals.
2. The woven filter belt according to claim 1, characterized in that, Between two adjacent second monofilaments (130), there are 1 to 4 multifilaments (140).
3. The woven filter belt according to claim 2, characterized in that, Between two adjacent second monofilaments (130), there is one polyfilament (140), and the distance between two adjacent polyfilaments (140) is less than the diameter of the second monofilament (130), and / or, the distance between two adjacent second monofilaments (130) is less than the diameter of the polyfilament (140).
4. The woven filter belt according to claim 3, characterized in that, The distance between two adjacent multifilaments (140) is 50~150μm; And / or, the distance between two adjacent second monofilaments (130) is 50~150μm.
5. The woven filter belt according to claim 1, characterized in that, Along the thickness direction of the woven filter belt, the second monofilament (130) has 1 layer and the multifilament (140) has 1 layer; Alternatively, along the thickness direction of the woven filter belt, the second monofilament (130) has 1 to 5 layers, and the multifilament (140) has 1 to 5 layers.
6. The woven filter belt according to claim 5, characterized in that, Along the thickness direction of the woven filter belt, adjacent layers of the second monofilament (130) and / or the multifilament (140) are staggered.
7. The woven filter belt according to any one of claims 1 to 6, characterized in that, The multifilament (140) comprises multiple single fibers (141), and the fineness of the single fiber (141) is less than or equal to 1.5 dtex, and the multifilament (140) is 300~500 denier; And / or, the diameter of the first monofilament (110) is 0.4~0.6 mm; And / or, the diameter of the second monofilament (130) is 0.6~0.7 mm.
8. The woven filter belt according to claim 7, characterized in that, The single fiber (141) is a polypropylene single fiber; And / or, the first monofilament (110) is a polyethylene terephthalate monofilament; And / or, the second monofilament (130) is a polyethylene terephthalate monofilament.
9. The woven filter belt according to any one of claims 1 to 6, characterized in that, The pore size of the skeleton hole (120) is 150~300μm.
10. A high-pressure belt dewatering machine, characterized in that, Includes the woven filter belt according to any one of claims 1 to 9.