A backflushing device for a belt filter

Abstract

The utility model discloses a backflushing device for belt filter press, its characterized in that: this backflushing device includes one bottom open five face closed nature mechanism, is arranged one water supply pipe (2) through its inner chamber in the length direction of this five face closed nature mechanism, is arranged with several interval arrangement shower nozzle (3) in the bottom of water supply pipe (2), the inner chamber both sides of this five face closed nature mechanism are arranged with the water baffle (4) perpendicular to belt filter press screen belt operation direction respectively, and the water baffle (4) outside of belt filter press screen belt operation direction downstream side is arranged with water suction strip (5). The utility model discloses through adding additional water absorption's water baffle structure, can remove the adsorbed water remaining in the mesh inside further more when effectively blocking the large amount of washing water generated in the backflushing process, further reduces the water content of sludge after squeezing.

Description

Technical Field

[0001] This utility model relates to the field of sludge dewatering technology, and more particularly to a belt filter press for municipal sludge dewatering, specifically a backwashing device for a belt filter press. Background Technology

[0002] Belt filter presses are highly efficient equipment widely used in solid-liquid separation, particularly for sludge dewatering in municipal wastewater treatment. In this technical field, the dewatering principle of a belt filter press involves passing flocculated sludge through a gravity dewatering zone, reducing its moisture content from 97% to approximately 90% through gravity seepage. The gravity-dewatered sludge is then fed into an intermediate area composed of upper and lower filter belts. The sludge is held between the upper and lower filter belts and fed into several sets of S-shaped rollers. Tensioning cylinders tighten the upper and lower filter belts, creating a squeezing force on the sludge at the S-shaped rollers, resulting in further deep dewatering. Finally, a scraping mechanism on the filter belts peels off the sludge cake.

[0003] The backwashing device of a belt filter press is one of the core components of the filter belt cleaning system. It primarily uses high-pressure water flow to remove residual sludge and blockages from the filter belt pores after filtration, thus regenerating the belt. However, existing backwashing devices in this technical field have the following problems: (1) When the existing backwashing device is used on the belt filter press, the filter belt nozzle will generate a large amount of water in a short time. However, due to the filter belt being designed for filter pressing, this part of the water cannot be discharged in time due to the seepage resistance on the filter belt. The traditional single-bar water barrier method cannot effectively block a large amount of water flow after the water pressure increases. As a result, the overflowing water will gather on the mesh surface to form a pool and will re-enter the pressing area with the mesh surface to "contaminate" the sludge to be pressed, affecting the filter pressing effect.

[0004] (2) At the same time, after traditional backwashing, a large amount of water will be adsorbed inside the filter mesh due to surface tension to form a water film. Ordinary water-blocking strips cannot effectively remove the residual water in this part. Therefore, the filter belt containing the water film will enter the next round of filter pressing, thus affecting the moisture content of the filter cake after subsequent filter pressing. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a backwashing device for belt filter presses.

[0006] The objective of this utility model is achieved through the following technical solution: A backwashing device for a belt filter press is characterized in that: the backwashing device includes a five-sided enclosed mechanism with an open bottom, a water supply pipe extending through the inner cavity of the five-sided enclosed mechanism is arranged along the length direction of the mechanism, a plurality of nozzles are arranged at intervals at the bottom of the water supply pipe, water-blocking strips perpendicular to the running direction of the belt filter press are arranged on both sides of the inner cavity of the five-sided enclosed mechanism, and a water-absorbing strip is arranged on the outer side of the water-blocking strip downstream of the belt filter press in the running direction of the belt filter press.

[0007] The water-blocking strip is made of soft silicone with a thickness of 5mm to 10mm.

[0008] The absorbent strip is made of sponge.

[0009] The water supply pipe is capable of providing a high-pressure water flow of 0.3 MPa to 0.6 MPa to the nozzle.

[0010] The water-blocking strip and the water-absorbing strip are both fixedly installed on the outer side of the five-sided enclosed mechanism in the width direction by fasteners.

[0011] Meanwhile, the fasteners on one side of the water-blocking strip and the water-absorbing strip adopt an L-shaped long strip structure. The vertical part of the fastener is used to press the water-blocking strip horizontally and then is fixed to the side of the five-sided enclosed mechanism with matching screws and nuts. The horizontal part of the fastener is used to press the water-absorbing strip vertically downward so that the bottom of the water-absorbing strip can be in close contact with the mesh belt.

[0012] The five-sided sealing mechanism consists of a gate-shaped outer shell and a fixing seat for fixed connection with the belt filter press. The fixing seat is respectively set at two ends of the shell along its length, and the fixing seat can close the gate-shaped openings at both ends of the shell along its length.

[0013] The outer shell includes a top plate, a first side plate, and a second side plate. The bottom of the two sides of the elongated top plate are respectively fixed to the first side plate and the second side plate, or the three are integrally formed. The first side plate is located upstream of the mesh belt of the belt filter press in the direction of operation, and the second side plate is downstream of the first side plate. A water-blocking strip is arranged on the outer side of the first side plate, and a water-blocking strip and a water-absorbing strip are arranged sequentially on the outer side of the second side plate.

[0014] The water-blocking strip is fixedly installed on the lower part of the corresponding first side plate and second side plate using fasteners and matching screws and nuts; and the lower edge of the water-blocking strip is lower than the lower edge of the corresponding first side plate and second side plate.

[0015] The absorbent strip is disposed outside the water-blocking strip on one side of the second side plate, and the bottom of the absorbent strip is not higher than the bottom of the water-blocking strip.

[0016] The fastener on one side of the absorbent strip adopts an L-shaped long strip structure.

[0017] Compared with the prior art, the present invention has the following advantages: (1) This utility model uses a combination structure design of water-absorbing strip and water-blocking strip to effectively block a large amount of rinsing water generated during the backwashing process, while absorbing and removing the adsorbed water remaining inside the mesh, ensuring that the dryness of the filter screen surface will not affect the moisture content of the next round of sludge pressing.

[0018] (2) The water-blocking strip on the upstream side (first side plate) of this utility model ensures that the high-pressure water can fully penetrate and flush away the blockage. The water-blocking strip on the downstream side (second side plate) first scrapes away most of the residual water and impurities carried by the water flow from the surface of the mesh belt; the sponge absorbent strip that is close to the mesh belt plays a key role in removing residual liquid from the mesh belt.

[0019] (3) This utility model is composed of modular components such as shell, fixed base, and water supply pipe. It has a simple structure and a fixed design that allows it to be firmly installed on the filter press frame, making installation and maintenance convenient. Attached Figure Description

[0020] Appendix Figure 1 A side cross-sectional view of a backwashing device for a belt filter press provided by this utility model; Appendix Figure 2 A schematic diagram of the external structure of a backwashing device for a belt filter press provided by this utility model; Appendix Figure 3 This is a front cross-sectional view of a backwashing device for a belt filter press provided by the present invention.

[0021] Wherein: 1—outer shell; 11—top plate; 12—first side plate; 13—second side plate; 2—water supply pipe; 3—spray head; 4—water baffle strip; 5—water suction strip; 6—fastener; 7—fixed base. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0023] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0024] like Figure 1-3As shown: A backwashing device for a belt filter press, the backwashing device includes a five-sided enclosed mechanism with a bottom opening. A water supply pipe 2 is arranged through the inner cavity of the five-sided enclosed mechanism along its length. The bottom of the water supply pipe 2, which can provide a high-pressure water flow of 0.3Mpa-0.6Mpa, is provided with a plurality of nozzles 3 arranged at intervals. Water-blocking strips 4 perpendicular to the running direction of the belt filter press mesh belt are arranged on both sides of the inner cavity of the five-sided enclosed mechanism. A water-absorbing strip 5 is arranged on the outer side of the water-blocking strip 4 downstream of the running direction of the belt filter press mesh belt. The water-blocking strip 4 and the water-absorbing strip 5 are both fixedly installed on the outer side of the five-sided enclosed mechanism in the width direction by fasteners 6. Meanwhile, the fasteners 6 on one side of the water-blocking strip 4 and the water-absorbing strip 5 adopt an L-shaped long strip structure. The vertical part of the fastener 6 is used to press the water-blocking strip 4 horizontally and then fixed to the side of the five-sided enclosed mechanism with matching screws and nuts. The horizontal part of the fastener 6 is used to press the water-absorbing strip 5 vertically downward so that the bottom of the water-absorbing strip 5 can be in close contact with the mesh belt.

[0025] The aforementioned five-sided enclosed mechanism consists of a gate-shaped outer shell 1 and fixing seats 7 for fixed connection with the belt filter press. The fixing seats 7 are respectively located at two ends along the length of the outer shell 1, and the fixing seats 7 can close the gate-shaped openings at both ends along the length of the outer shell 1. The outer shell 1 includes a top plate 11, a first side plate 12, and a second side plate 13. The bottom of the two sides of the elongated top plate 11 are respectively fixed to the first side plate 12 and the second side plate 13, or the three are integrally formed. The first side plate 12 is located upstream in the running direction of the belt filter press, and the second side plate 13 is located on the first side. Downstream of plate 12, a water-blocking strip 4 is arranged on the outer side of the first side plate 12, and a water-absorbing strip 5 is arranged sequentially on the outer side of the second side plate 13. The water-blocking strip 4 is fixedly installed on the lower part of the corresponding first side plate 12 and second side plate 13 using fasteners 6 and matching screws and nuts, and the lower edge of the water-blocking strip 4 is lower than the lower edge of the corresponding first side plate 12 and second side plate 13. The water-absorbing strip 5 is arranged on the outer side of the water-blocking strip 4 on one side of the second side plate 13, the bottom of the water-absorbing strip 5 is not higher than the bottom of the water-blocking strip 4, and the fastener 6 on one side of the water-absorbing strip 5 adopts an L-shaped long strip structure.

[0026] The water-blocking strip 4 is made of soft silicone with a thickness of 5mm to 10mm, which can effectively block a large amount of water flow and prevent the overflowing water from accumulating on the mesh surface to form a pool, thereby improving the sealing performance of the five-sided sealing mechanism along the running direction of the belt filter press.

[0027] To effectively remove adsorbed water from the mesh belt holes, a sponge is selected as the absorbent strip 5, thereby effectively removing residual water from the mesh belt holes. Example

[0028] A backwashing device for a belt filter press, such as Figure 1-3 As shown, the backwashing device is installed on a belt filter press and includes: a housing 1, a water supply pipe 2, a nozzle 3, a water baffle 4, a water suction strip 5, fasteners 6, and a fixing base 7.

[0029] like Figure 1 As shown, the outer casing 1 has a door-shaped structure, including a top plate 11, a first side plate 12, and a second side plate 13. The first side plate 12 is defined as being upstream of the belt filter press in the direction of belt conveyor operation, and the second side plate 13 is downstream of the first side plate 12. A water-blocking strip 4 and a water-absorbing strip 5 are fixedly connected to the outside of the outer casing 1 by fasteners 6. The fasteners 6 are positioned on the outermost sides of the water-blocking strip 4 and the water-absorbing strip 5, and are L-shaped strips with a width equal to the length of the outer casing 1. The fasteners 6 are fixedly connected to the outer casing 1 by screws and nuts. In this embodiment, the water-blocking strip 4 is fixed to the first side plate 12 and the second side plate 13 respectively. The bottom of the water-blocking strip 4 extends beyond the first side plate 12 and the second side plate 13. In this embodiment, the water-blocking strip 4 is made of soft silicone with a thickness of 5mm to 10mm. The water-absorbing strip 5 is positioned outside the water-blocking strip 4 on one side of the second side plate 13. The bottom of the water-absorbing strip 5 is configured to extend beyond or at least be flush with the bottom of the water-blocking strip 4. In this embodiment, the material of the water-absorbing strip 5 is sponge.

[0030] like Figure 2 As shown, the fixing bases 7 are respectively set at the two ends of the outer shell 1 along the length direction, and are used to fix and connect with the belt filter press.

[0031] Figure 3 As shown, the water supply pipe 2 is installed inside the outer casing 1 and extends along the length of the outer casing 1 at the same length as the outer casing 1. Several nozzles 3 are vertically fixedly connected to the bottom of the water supply pipe 2 at intervals. In this embodiment, the spacing between the nozzles 3 is configured to be 100mm. The water supply pipe 2 is configured to provide a high-pressure water flow of 0.3 to 0.6 MPa.

[0032] This invention adds an additional water-absorbing and water-blocking structure, which not only effectively blocks the large amount of rinsing water generated during backwashing, but also removes the adsorbed water remaining inside the mesh, further reducing the moisture content of the sludge after pressing.

[0033] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0035] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A backwashing device for a belt filter press, characterized in that: The backwashing device includes a five-sided closed mechanism with an open bottom. A water supply pipe (2) is arranged through the inner cavity of the five-sided closed mechanism along its length. Several nozzles (3) are arranged at intervals at the bottom of the water supply pipe (2). Water-blocking strips (4) perpendicular to the running direction of the belt filter press are arranged on both sides of the inner cavity of the five-sided closed mechanism. A water-absorbing strip (5) is arranged on the outside of the water-blocking strip (4) on the downstream side of the running direction of the belt filter press.

2. The backwashing device for a belt filter press according to claim 1, characterized in that: The water-blocking strip (4) is made of soft silicone with a thickness of 5mm to 10mm.

3. The backwashing device for a belt filter press according to claim 1, characterized in that: The absorbent strip (5) is made of sponge.

4. The backwashing device for a belt filter press according to claim 1, characterized in that: The water supply pipe (2) is capable of providing a high-pressure water flow of 0.3Mpa-0.6Mpa to the nozzle (3).

5. The backwashing device for a belt filter press according to claim 1, characterized in that: The water-blocking strip (4) and the water-absorbing strip (5) are both fixedly installed on the outer side of the width direction of the five-sided enclosed mechanism by fasteners (6).

6. The backwashing device for a belt filter press according to claim 1, characterized in that: Meanwhile, the fasteners (6) on one side of the water-blocking strip (4) and the water-absorbing strip (5) adopt an L-shaped long strip structure. The vertical part of the fastener (6) is used to press the water-blocking strip (4) horizontally and then fixed to the side of the five-sided enclosed mechanism with matching screws and nuts. The horizontal part of the fastener (6) is used to press the water-absorbing strip (5) vertically downward so that the bottom of the water-absorbing strip (5) can be in close contact with the mesh belt.

7. The backwashing device for a belt filter press according to any one of claims 1-6, characterized in that: The five-sided sealing mechanism consists of a gate-shaped shell (1) and a fixing seat (7) for fixed connection with the belt filter press. The fixing seat (7) is respectively set at the two ends of the shell (1) in the length direction. The fixing seat (7) can close the gate-shaped openings at both ends of the shell (1) in the length direction.

8. The backwashing device for a belt filter press according to claim 7, characterized in that: The outer shell (1) includes a top plate (11), a first side plate (12), and a second side plate (13). The bottom of the two sides of the long strip-shaped top plate (11) are respectively fixed to the first side plate (12) and the second side plate (13), or the three are integrally formed. The first side plate (12) is located upstream of the mesh belt of the belt filter press in the running direction, and the second side plate (13) is located downstream of the first side plate (12). A water-blocking strip (4) is arranged on the outside of the first side plate (12), and a water-blocking strip (4) and a water-absorbing strip (5) are arranged sequentially on the outside of the second side plate (13).

9. The backwashing device for a belt filter press according to claim 8, characterized in that: The water-blocking strip (4) is fixedly installed on the lower part of the corresponding first side plate (12) and second side plate (13) using fasteners (6) and matching screws and nuts; and the lower edge of the water-blocking strip (4) is lower than the lower edge of the corresponding first side plate (12) and second side plate (13).

10. The backwashing device for a belt filter press according to claim 8, characterized in that: The absorbent strip (5) is disposed outside the water-blocking strip (4) on one side of the second side plate (13), and the bottom of the absorbent strip (5) is not higher than the bottom of the water-blocking strip (4).

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