Filter backwash drainage device

Abstract

The utility model discloses a filter tank backwash drainage device relates to sewage filter tank technical field. Its structure includes the pair of cofferdam of V type filter tank, pool wall and the upper diversion pool, lower diversion pool, hydraulic cylinder and the lift cofferdam that the horizontal partition flat layer between the pair of cofferdam is separated, is established the passage that is linked with lower diversion pool in the bottom of cofferdam, is fixed with vertical baffle between horizontal partition flat layer and V type filter tank pool bottom, and lower diversion pool is separated as left and right two parts. The utility model discloses a kind of design of this rotation backwash, filter tank system can complete backwash operation without shutdown, when one side filter tank backwash, the other side filter tank still can normally work, to ensure the continuous operation of filter tank system, provide conditions for sewage continuous uninterrupted processing, avoid the pressure that filter tank filtration stops brings to other sewage treatment link.

Description

Technical Field

[0001] This utility model belongs to the field of sewage filtration technology, and in particular relates to a filter backwashing and drainage device. Background Technology

[0002] In the field of water treatment, filters, as key filtration equipment, are widely used in drinking water treatment, industrial wastewater treatment, and sewage treatment. Filters purify water by trapping suspended solids, colloids, and other impurities in the water through a filter media layer. However, during long-term operation, impurities gradually accumulate in the filter media layer, leading to decreased filtration efficiency and deteriorated water quality. Therefore, regular backwashing of the filter to restore the filtration performance of the filter media is an important aspect of filter maintenance and management. Traditional filter backwash drainage devices typically use fixed weirs or weir plates to discharge backwash wastewater from the filter through drainage pipes. In traditional backwashing, to thoroughly remove impurities from the filter media layer, it is usually necessary to stop the operation of the filter and perform a complete backwash. This results in the filter being unable to continue treating water during backwashing, interrupting the water filtration process for small treatment plants with only a single filter. To ensure continuous sewage treatment and avoid putting pressure on other treatment stages, this application provides a filter backwash drainage device. Utility Model Content

[0003] The purpose of this utility model is to provide a filter backwashing and drainage device, which realizes the alternating backwashing of the filter and non-stop operation through innovative structural design.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model is a filter backwashing and drainage device, including a pair of weirs of a V-shaped filter, a pool wall, and an upper guide pool, a lower guide pool, a hydraulic cylinder, and a lifting weir, which are separated by a horizontal partition between the pair of weirs. The bottom of the weirs is provided with a channel that connects to the lower guide pool. A vertical partition is fixed between the horizontal dividing layer and the bottom of the V-shaped filter pool, dividing the lower guide pool into left and right parts; a channel is opened in the middle of the cofferdam to cooperate with the lifting cofferdam; a first horizontal isolation plate is set in the middle of the channel and is integrated with the cofferdam; the cylinder body of the hydraulic cylinder is installed below the first horizontal isolation plate, and the free end of the hydraulic cylinder piston rod passes through the first horizontal isolation plate and is hinged to the lower end of the lifting cofferdam through a hinge seat; a backwash sewage collection trough is opened on the side of the lifting cofferdam adjacent to the filter pool; a backwash sewage collection outlet is opened at one end of the lifting cofferdam; a backwash sewage outlet is opened on the side wall of the pool wall adjacent to the backwash sewage collection outlet to cooperate with the backwash sewage collection outlet.

[0006] As a preferred embodiment of this utility model, a guide trough connected to the cofferdam is fixed to the inner wall of the pool, and the backwash wastewater outlet is located inside the guide trough; the guide trough is vertically slidingly engaged with the lifting cofferdam.

[0007] As a preferred technical solution of this utility model, the main body of the lifting cofferdam is a rectangular box with a hollow cuboid structure that slides vertically with the channel; several layers of horizontally arranged reinforcing partitions are fixed on the inner wall of the rectangular box; the space above the uppermost reinforcing partition on the inner wall of the rectangular box is a backwash sewage diversion channel; the backwash sewage collection port and the backwash sewage confluence outlet are both connected to the backwash sewage diversion channel.

[0008] As a preferred embodiment of this utility model, a right-angled triangular guide plate is fixed to the top of the rectangular box on the side adjacent to the filter tank.

[0009] As a preferred embodiment of this utility model, the channel is fixed with a second horizontal isolation plate that is integrally connected with the cofferdam, located below the hydraulic cylinder on the inner wall of the channel.

[0010] As a preferred embodiment of this utility model, the backwash wastewater outlet is connected to a conveying pipe that leads directly to the wastewater tank, and a pipeline pump is installed on the conveying pipe.

[0011] This utility model has the following beneficial effects:

[0012] 1. This utility model divides the filter into an upper and lower diversion pool by setting a horizontal dividing layer between a pair of cofferdams, and further uses vertical partitions to divide the lower diversion pool into left and right parts, providing a structural basis for alternating backwashing. When one side of the filter needs backwashing, the lifting cofferdam on that side is raised to prevent water from the upper diversion pool from flowing into that side of the filter, while ensuring that water from the upper diversion pool flows into the other side of the filter that has not been backwashed, allowing it to continue participating in the filtration operation. Through this alternating backwashing design, the filter system can complete the backwashing operation without stopping the machine. When one side of the filter is being backwashed, the other side of the filter can still operate normally, thus ensuring the continuous operation of the filter system.

[0013] 2. In this invention, backwash wastewater enters the backwash wastewater diversion channel through the backwash wastewater collection port on the lifting weir, and is finally discharged through the backwash wastewater outlet on the pool wall. This process ensures the effective collection and smooth discharge of backwash wastewater, avoiding the accumulation of wastewater and secondary pollution in the filter pool.

[0014] 3. This utility model can remove impurities in the filter media layer in a timely manner through regular backwashing operations, prevent impurities from accumulating in the filter media, thereby restoring the filtration performance of the filter media and extending its service life.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the backwashing and drainage device for the filter bed of this utility model.

[0018] Figure 2 This is a schematic diagram of the cross-section of a lifting cofferdam.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1-Cofferdam, 2-Pool wall, 3-Upper diversion pool, 4-Lower diversion pool, 5-Horizontal partition layer, 6-Hydraulic cylinder, 7-Lifting cofferdam, 8-Vertical partition, 11-Channel, 12-First horizontal partition, 13-Second horizontal partition, 21-Backwash wastewater outlet, 22-Guide trough, 71-Backwash wastewater collection trough, 72-Backwash wastewater confluence outlet, 73-Rectangular box, 74-Reinforced partition, 75-Backwash wastewater diversion channel, 76-Right-angled triangular guide plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Specific Implementation Example 1: Please refer to Figure 1-2As shown, this utility model is a filter backwashing and drainage device, including a pair of weirs 1 of a V-shaped filter, a pool wall 2, and an upper guide pool 3, a lower guide pool 4, a hydraulic cylinder 6, and a lifting weir 7, which are separated by a horizontal partition 5 between the pair of weirs 1. The bottom of the weirs 1 has a channel that connects to the lower guide pool 4. A vertical partition 8 is fixed between the horizontal partition 5 and the bottom of the V-shaped filter, dividing the lower guide pool 4 into left and right parts. The control valves for the aeration supply pipelines of the left and right parts of the lower guide pool 4 are set separately, and the control valves for the backwash water supply pipelines are also set separately. A channel 11 that cooperates with the lifting weir 7 is opened in the middle of the weirs 1. A first horizontal isolation plate 12 that is integrally connected to the weirs 1 is set in the middle of the channel 11. The cylinder body of the hydraulic cylinder 6 is installed below the first horizontal isolation plate 12. After the piston rod of the hydraulic cylinder 6 passes through the first horizontal isolation plate 12, its free end is hinged to the lower end of the lifting weir 7 through a hinge seat. The hydraulic cylinder 6 is controlled by an existing hydraulic station for oil supply and extension, with the oil supply pipe passing through the pool wall 2 and being relatively sealed. A backwash wastewater collection trough 71 is provided on the side adjacent to the filter pool of the lifting weir 7. A backwash wastewater collection outlet 72 is provided at one end of the lifting weir 7. A backwash wastewater outlet 21, which mates with the backwash wastewater collection outlet 72, is provided on the side wall of the pool wall 2 adjacent to the backwash wastewater collection outlet 72.

[0023] When backwashing of the filter is required, the lifting weir 7 on one side is raised. This action effectively isolates the area of ​​the filter requiring backwashing from the upper guide pool 3. The raised lifting weir 7 prevents water from the upper guide pool 3 from flowing into the filter undergoing backwashing. This avoids interference from the water flow in the upper guide pool 3 with the backwashing process, ensuring that the backwashing operation can be carried out in a relatively independent and stable environment. At the same time, the raised lifting weir 7 also guides the water flow. It ensures that water in the upper guide pool 3 can smoothly flow into the filter on the other side where the lifting weir 7 is not raised, allowing that filter to continue its normal filtration operation and maintaining the continuous operation of the entire filter system.

[0024] The inner wall of the pool wall 2 is fixed with a guide trough 22 connected to the cofferdam 1, and the backwash wastewater outlet 21 is located inside the guide trough 22. The guide trough 22 is vertically slidably engaged with the lifting cofferdam 7. The backwash wastewater outlet 21 is connected to a conveying pipe that leads directly to the wastewater pool, and a pipeline pump is installed on the conveying pipe. The vertical sliding engagement between the guide trough 22 fixed to the inner wall of the pool wall 2 and the lifting cofferdam 7 ensures the stability and verticality of the cofferdam during the lifting process, preventing jamming or displacement of the cofferdam during operation.

[0025] The lifting cofferdam 7 is primarily a rectangular hollow box 73 that slides vertically into the channel 11. Several layers of horizontally arranged reinforcing baffles 74 are fixed to the inner wall of the rectangular box 73. The space above the uppermost reinforcing baffle 74 on the inner wall of the rectangular box 73 is a backwash wastewater diversion channel 75. Both the backwash wastewater collection port 71 and the backwash wastewater confluence outlet 72 are connected to the backwash wastewater diversion channel 75. The lifting cofferdam 7, with its rectangular box 73 structure and internal reinforcing baffles 74, enhances the structural strength and stability of the cofferdam, enabling it to withstand the impact and pressure changes of the water flow during backwashing.

[0026] A right-angled triangular guide plate 76 is fixed to the top of the rectangular box 73 on the side adjacent to the filter tank. The right-angled triangular guide plate 76 reduces the impact on the filter media when the upper guide tank 3 enters the filter tank, ensuring the uniform distribution of the filter media.

[0027] The lifting and lowering of the cofferdam 7 is driven by hydraulic cylinder 6, enabling precise control of the cofferdam's position. The hydraulic system can quickly respond to and adjust the cofferdam's height according to backwashing requirements, meeting the backwashing needs under different working conditions.

[0028] Among them, the inner wall of the channel 11 is located below the hydraulic cylinder 6 and is fixed with a second horizontal isolation plate 13 that is integrated with the cofferdam 1.

[0029] like Figure 1 The diagram illustrates the backwashing process of a single-sided filter. In the filter on the side with the raised weir 7, aeration is first performed. Gas is introduced from the bottom of the filter, fluidizing the filter media and loosening impurities trapped on the surface and in the pores. After aeration, backwash water is introduced into the filter from the left side of the lower guide tank 4. The backwash water flows upward through the filter media, washing away the aerated impurities and carrying them out of the filter through the backwash wastewater collection port 71 on the raised weir 7. Finally, it flows into the wastewater tank through the backwash wastewater confluence outlet 72, the backwash wastewater outlet 21, and the conveying pipeline. The design of the raised weir 7 and the setting of the backwash wastewater guide channel 75 ensure that the backwash water flows along a preset path, maximizing backwashing efficiency and effectively preventing the backwash water from affecting the filter on the un-backwashed side. Effective backwashing can promptly remove impurities from the filter media layer, preventing their accumulation and extending the media's lifespan, thus reducing replacement frequency and operating costs. Regular backwashing of the filter bed restores the media's filtration performance, ensuring the filter system maintains optimal filtration efficiency and guaranteeing the stability and reliability of the effluent quality.

[0030] By using a backwashing mode that alternates between the two side filters, the other side can continue to work while one side is being backwashed, thus achieving uninterrupted operation of the filter system and improving the overall processing capacity and operating efficiency of the filter system.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A filter backwashing and drainage device, comprising a pair of weirs (1) of a V-shaped filter, a filter wall (2), and an upper guide pool (3) and a lower guide pool (4) separated from the pair of weirs (1) by a horizontal dividing layer (5) in the middle, characterized in that: It also includes a hydraulic cylinder (6) and a lifting weir (7); a vertical partition (8) is fixed between the horizontal dividing layer (5) and the bottom of the V-shaped filter pool, dividing the lower diversion pool (4) into left and right parts; The cofferdam (1) has a channel (11) in the middle that cooperates with the lifting cofferdam (7); the channel (11) has a first horizontal isolation plate (12) in the middle that is connected to the cofferdam (1); the cylinder body of the hydraulic cylinder (6) is installed below the first horizontal isolation plate (12), and the free end of the piston rod of the hydraulic cylinder (6) is hinged to the lower end of the lifting cofferdam (7) through a hinge seat after passing through the first horizontal isolation plate (12); The lifting weir (7) has a backwash wastewater collection trough (71) on one side adjacent to the filter tank; the lifting weir (7) has a backwash wastewater collection outlet (72) at one end; the tank wall (2) has a backwash wastewater outlet (21) on the side wall adjacent to the backwash wastewater collection outlet (72) that cooperates with the backwash wastewater collection outlet (72).

2. The filter backwashing and drainage device according to claim 1, characterized in that, The inner wall of the pool wall (2) is fixed with a guide trough (22) connected to the cofferdam (1), and the backwash sewage outlet (21) is located inside the guide trough (22); the guide trough (22) and the lifting cofferdam (7) slide vertically together.

3. The filter backwashing and drainage device according to claim 2, characterized in that, The main body of the lifting cofferdam (7) is a rectangular box (73) with a hollow cuboid structure and vertical sliding cooperation with the channel (11); the inner wall of the rectangular box (73) is fixed with several layers of horizontally arranged reinforcing partitions (74); the space above the uppermost layer of the reinforcing partitions (74) on the inner wall of the rectangular box (73) is a backwash sewage diversion channel (75); the backwash sewage collection port (71) and the backwash sewage confluence outlet (72) are both connected to the backwash sewage diversion channel (75).

4. The filter backwashing and drainage device according to claim 3, characterized in that, The rectangular box (73) has a right-angled triangular guide plate (76) fixed on the top of the side adjacent to the filter tank.

5. The filter backwash drainage device according to claim 1, characterized in that, The channel (11) is located below the hydraulic cylinder (6) and is fixed with a second horizontal isolation plate (13) that is integrated with the cofferdam (1).

6. The filter backwash drainage device according to claim 1, characterized in that, The backwash wastewater outlet (21) is connected to a conveying pipe that leads directly to the wastewater tank, and a pipeline pump is installed on the conveying pipe.

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