raw water filter

Abstract

The present application relates to the technical field of filtration and discloses a raw water filter, which comprises a tank body, a first hole plate and a second hole plate, a fiber bundle assembly, a driving assembly and a flushing assembly, the first hole plate and the second hole plate are arranged in the tank body in a direction along a central axis of the tank body and are spaced apart from each other, a filter chamber is formed at the spacing, the driving assembly is used for driving the first hole plate to move reciprocally along a height direction of the tank body and to rotate around the central axis of the tank body, the fiber bundle assembly is arranged between the first hole plate and the second hole plate, and rotation and / or movement of the first hole plate can cause the fiber bundle assembly to deform so as to change a porosity of the fiber bundle assembly, and the flushing assembly is used for spraying cleaning medium to clean impurities on the fiber bundle assembly. The raw water filter of the embodiment of the present application realizes further compression and stretching of the fiber bundle during filtration and backwashing, and improves filtration effect and self-cleaning effect.

Description

Technical Field

[0001] This invention belongs to the field of filtration technology, specifically relating to a raw water filter. Background Technology

[0002] Piston-type fiber filters use fiber bundles as filter elements. Currently, these filters suffer from the following problems: Over long-term operation, excessive water-based chemicals can cause fiber bundle adhesion, leading to backwashing deviation, poor cleaning effect, difficulty in restoring filtration capacity, and reduced equipment operational stability. Related technologies have addressed the filter by repairing it, including adjusting the pressure plate, reinforcing the structure, replacing filter media, and modifying the actuator, but these measures have not fundamentally solved the core drawbacks of the existing technology, requiring a comprehensive technical overhaul. Furthermore, the moving steel plate in this type of filter is prone to deformation due to insufficient strength, causing fiber bundle deviation and tilting of the movable perforated plate, resulting in uneven water distribution and even short-circuiting of incoming water, severely impacting filtration efficiency and effluent water quality. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a raw water filter that achieves further compression and stretching of the fiber bundle, improving filtration and self-cleaning effects, and enhancing the strength and movement stability of the first perforated plate.

[0004] The raw water filter of this invention includes a tank, a first perforated plate and a second perforated plate, a fiber bundle assembly, a drive assembly, and a flushing assembly. The upper sidewall of the tank has an inlet, and the bottom of the tank has a drain outlet. The first and second perforated plates are arranged perpendicular to the central axis of the tank and spaced apart within the tank, forming a filter chamber at the intervals. The first perforated plate is located above the second perforated plate and is adapted to the height of the inlet. The first perforated plate can reciprocate along the height of the tank and can rotate around the center of the tank. The fiber bundle assembly is disposed between the first perforated plate and the second perforated plate, and the rotation and / or movement of the first perforated plate can deform the fiber bundle assembly to change its porosity. The drive assembly includes a main shaft disposed along the central axis of the tank, the lower end of which is connected to the first perforated plate so that the main shaft drives the first perforated plate to rotate and reciprocate along the height direction of the tank. The rinsing assembly includes a nozzle assembly disposed in the filter chamber and used to spray a cleaning medium to clean impurities on the fiber bundle assembly.

[0005] The raw water filter of this invention solves the problems of easy deformation of the pressure plate, uneven water distribution, fiber bundle deviation and poor backwashing effect of traditional fiber filters. By flexibly adjusting the porosity of the fiber bundle through the rotatable first perforated plate, the filtration accuracy and dirt interception capacity are improved, the effluent meets the water inlet requirements of the membrane device, and the backwashing effect is optimized, which greatly improves the stability of equipment operation.

[0006] In some embodiments, the drive assembly further includes a rotary drive component and a linear drive component. The rotary drive component is mounted on the outer wall of the tank and has a rotatable power output end. The linear drive component connects the power output end and the upper end of the main shaft to transmit the rotational motion of the power output end to the main shaft and simultaneously drive the main shaft to move the first perforated plate back and forth along the height direction of the tank.

[0007] In some embodiments, the rinsing assembly further includes a mixing device and a liquid outlet pipe. The mixing device has a liquid inlet, an air inlet, and a liquid outlet. The mixing device is used to mix gas and liquid to form a cleaning medium with a set pressure. The liquid outlet pipe connects the liquid outlet and the nozzle assembly. At least a portion of the liquid outlet pipe is disposed in the internal cavity of the main shaft along the axial direction of the main shaft.

[0008] In some embodiments, the nozzle assembly includes a nozzle having a plurality of nozzles, a liquid outlet conduit communicating with the nozzle, and the lower end of the spindle passing through the first orifice plate and positioned between the first orifice plate and the second orifice plate and connected to the nozzle.

[0009] In some embodiments, the mixing device is an ultrasonic pulse gas-liquid mixing device.

[0010] In some embodiments, the fiber bundle assembly includes multiple fiber bundles, with one end of each fiber bundle connected to the first perforated plate and the other end connected to the second perforated plate.

[0011] In some embodiments, the first orifice plate and the second orifice plate are both plate-shaped structures adapted to the cross-section of the tank, and the plate-shaped structures are provided with a plurality of water passage holes.

[0012] In some embodiments, a filter cap is provided at the water passage hole on the second perforated plate.

[0013] In some embodiments, a sealing ring is provided on the circumferential side of the first perforated plate facing the inner wall of the tank.

[0014] In some embodiments, the raw water filter further includes a plurality of diagonal braces and a plurality of reinforcing ribs. The diagonal braces are located inside the tank and connect the main shaft and the first perforated plate. The reinforcing ribs are disposed on the side of the first perforated plate away from the second perforated plate and are distributed radially or in a grid pattern. At least some of the reinforcing ribs are connected to the diagonal braces.

[0015] The raw water filter of this invention, through optimized design including the lifting and rotation of the first perforated plate, structural reinforcement, corrosion protection, filter media adaptation, intelligent control, and enhanced backwashing, completely solves the problems of deformation and blockage of the moving perforated plate, equipment corrosion and leakage, fiber bundle detachment and adhesion, and insufficient motion control precision in traditional filters. It further improves the stability and durability of equipment operation, makes the filtration and backwashing actions of the fiber bundle assembly more precise, and achieves a filter media cleaning cleanliness of 98%. At the same time, it significantly reduces the frequency of equipment maintenance and the operating costs of subsequent membrane systems, achieving multiple optimizations in filtration efficiency, energy saving and consumption reduction, and equipment lifespan. It is suitable for long-term operation conditions of complex raw water filtration such as industrial boiler feedwater and industrial wastewater. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the raw water filter according to an embodiment of the present invention.

[0017] Figure label:

[0018] 1. Tank body; 11. Inlet; 12. Outlet; 2. First perforated plate; 3. Second perforated plate; 4. Filter chamber; 5. Fiber bundle assembly; 6. Drive assembly; 61. Spindle; 62. Rotary drive component; 63. Linear drive component; 7. Flushing assembly; 71. Nozzle assembly; 711. Spray pipe; 712. Nozzle; 72. Mixing device; 73. Liquid outlet pipe; 8. Filter cap; 9. Diagonal brace. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figure 1As shown, the raw water filter of this embodiment includes a tank 1, a first perforated plate 2 and a second perforated plate 3, a fiber bundle assembly 5, a drive assembly 6, and a flushing assembly 7. The upper side wall of the tank 1 has an inlet 11, and the bottom of the tank 1 has a drain outlet 12. The first perforated plate 2 and the second perforated plate 3 are arranged perpendicular to the central axis of the tank 1 and spaced apart within the tank 1, forming a filter chamber 4 at the intervals. The first perforated plate 2 is located above the second perforated plate 3 and is adapted to the height of the inlet 11. The first perforated plate 2 can reciprocate along the height direction of the tank 1 and can rotate around... The central axis of the tank 1 rotates, and the fiber bundle assembly 5 is disposed between the first perforated plate 2 and the second perforated plate 3. The rotation and / or movement of the first perforated plate 2 can deform the fiber bundle assembly 5 to change the porosity of the fiber bundle assembly 5. The drive assembly 6 includes a main shaft 61 disposed along the central axis of the tank 1. The lower end of the main shaft 61 is connected to the first perforated plate 2 so that the main shaft 61 drives the first perforated plate 2 to rotate and reciprocate along the height direction of the tank 1. The rinsing assembly 7 includes a nozzle assembly 71. The nozzle assembly 71 is disposed in the filter chamber 4 and is used to spray cleaning medium to clean impurities on the fiber bundle assembly 5.

[0021] This embodiment of the raw water filter specifically addresses the technical problems of uneven water distribution, insufficient filtration accuracy, and incomplete backwashing due to fiber bundle adhesion in traditional piston-type fiber bundle filters, resulting in substandard effluent quality. By optimizing the water flow path for raw water filtration and backwashing, and combining the rotational screwing and axial compression of the fiber bundle assembly 5 by the rotatable and liftable first perforated plate 2, a dense and uniform filter layer is formed, significantly improving the interception capacity and filtration accuracy, ensuring that the effluent quality meets standards. During backwashing, the design of raising the first perforated plate 2 above the inlet 11 and having the backwash water enter from the bottom drain 12 in reverse allows the fiber bundle assembly 5 to fully stretch and expand, enabling impurities to be directionally discharged from the inlet 11 along the water flow. Combined with the cleaning medium spraying of the flushing component 7, thorough cleaning without dead angles is achieved, completely solving the problems of fiber bundle adhesion and backwash flow deviation. At the same time, it improves backwashing efficiency, reduces the self-use rate of backwashing, significantly improves the overall operational stability of the equipment, and effectively reduces the fouling and maintenance costs of subsequent membrane systems.

[0022] In this embodiment, the raw water filter tank 1 is made of steel to adapt to various raw water filtration conditions. The upper side wall of the tank 1 has an inlet 11, which serves as the water inlet channel during raw water filtration and the impurity discharge channel during backwashing. The bottom of the tank 1 has a drain 12, which has the dual functions of clear water outlet during filtration and flushing water inlet during backwashing.

[0023] The first perforated plate 2 and the second perforated plate 3 are usually arranged horizontally, and the space between them forms a filter chamber 4. The filtration of raw water and the backwashing process of the fiber bundle assembly 5 are both completed in the filter chamber 4. The first perforated plate 2 is located above the second perforated plate 3, and its initial working height is adapted to the height position of the inlet 11. That is, since the first perforated plate 2 can move smoothly back and forth along the height direction of the tank 1, the first perforated plate 2 is lower than the inlet 11 during filtration, and higher than the inlet 11 during backwashing.

[0024] The fiber bundle assembly 5 is located in the filter chamber 4 and fills the space between the first perforated plate 2 and the second perforated plate 3. As the core filter element for raw water filtration, the first perforated plate 2 can rotate, move, or perform a combination of rotation and movement, which can cause the fiber bundle assembly 5 to deform accordingly. This can flexibly change the overall porosity of the fiber bundle assembly 5, increase the filtration effect by increasing the density of the fiber assembly, and improve the backwashing effect by loosening the fiber bundle assembly 5.

[0025] The drive assembly 6 provides stable power for the movement of the first perforated plate 2. It includes a main shaft 61 coaxially arranged along the central axis of the tank 1. The lower part of the main shaft 61 is firmly connected to the first perforated plate 2. The main shaft 61 can synchronously complete the rotational movement around its own axis and the linear reciprocating movement along its own axis, thereby driving the first perforated plate 2 to synchronously rotate and reciprocate along the height direction of the tank 1.

[0026] The rinsing assembly 7 includes a nozzle assembly 71, which is directly arranged inside the filter chamber 4 and can be positioned to face different areas of the fiber bundle assembly 5. The nozzle assembly 71 can spray a cleaning medium with a set pressure, which works in conjunction with the reverse mixing medium of the backwash to achieve all-round cleaning of the fiber bundle assembly 5.

[0027] The specific process is as follows: In the filtration state, the main shaft 61 descends and rotates appropriately, making the fiber bundle assembly 5 denser and continuously reducing the porosity to form a dense and uniform filter layer. Raw water enters the tank 1 through the inlet 11, first flowing to the area above the first perforated plate 2, and then passing down through the first perforated plate 2 into the filtration chamber 4. Suspended solids, colloids, organic matter, and other impurities in the water are effectively trapped by the fiber bundle assembly 5, achieving high-precision deep filtration. The filtered clean water flows through the second perforated plate 3 to the bottom area of ​​the tank 1, and finally exits from the drain outlet 12, completing the raw water filtration process. During the filtration process, water pressure also simultaneously exerts downward pressure on the first perforated plate 2, further increasing the density of the fiber bundles.

[0028] When the impurities trapped by the fiber bundle assembly 5 reach the set pressure value, or when the water volume processed by the equipment drops to a preset threshold, the equipment automatically switches to backwash mode. The drive assembly 6 drives the first perforated plate 2 to rotate in the opposite direction and move upward along the height direction of the tank 1 via the main shaft 61, until the overall height of the first perforated plate 2 is higher than the water inlet 11. At this time, the fiber bundle assembly 5 is fully stretched and expanded as the first perforated plate 2 rises, and the porosity increases significantly. The backwash gas-liquid mixture enters the tank 1 from the drain port 12 at the bottom of the tank 1 in the opposite direction, passes through the second perforated plate 3 from bottom to top and enters the filter chamber 4, forming a backwash gas-liquid mixture, which performs preliminary rinsing on the stretched and expanded fiber bundle assembly 5.

[0029] At the same time, the nozzle assembly 71 of the flushing assembly 7 sprays the cleaning medium into the filter chamber 4. The cleaning medium, together with the reverse flushing medium, forms an all-round impact on all parts of the fiber bundle assembly 5, completely stripping the impurities trapped on the fiber bundle. The stripped impurities continue to move upward with the reverse water flow and are discharged from the inlet 11 into the tank 1.

[0030] In some embodiments, the drive assembly 6 further includes a rotary drive component 62 and a linear drive component 63. The rotary drive component 62 is mounted on the outer wall of the tank 1 and has a rotatable power output end. The linear drive component 63 is connected to the power output end and the upper end of the main shaft 61, and is used to transmit the rotational motion of the power output end to the main shaft 61, and at the same time drive the main shaft 61 to drive the first perforated plate 2 to reciprocate along the height direction of the tank 1.

[0031] In this embodiment, the drive assembly 6, in addition to the main shaft 61, also includes a rotary drive component 62 and a linear drive component 63. The rotary drive component 62 uses a motor and can be further equipped with a reduction gear mechanism. It is fixedly mounted on the outer wall of the tank 1 via a bracket or similar support, and its mounting position corresponds to the axial position of the main shaft 61, generally located directly above it for easy direct power transmission. The rotary drive component 62 has a power output end that can rotate around its own axis, providing basic power for the rotation and lifting of the first perforated plate 2. The linear drive component 63, for example, uses a hydraulic telescopic device, an electric telescopic device, a pneumatic telescopic device, or a screw drive structure, etc. It is a whole unit, with one end coaxially fixed to the power output end of the rotary drive component 62, and the other end connected to the upper end of the main shaft 61. This achieves both the rotation and lifting functions of the main shaft 61.

[0032] In some specific embodiments, the linear drive component 63 can synchronously transmit the single rotational motion of the power output end in both directions. On one hand, it directly transmits the rotational power to the main shaft 61, driving the main shaft 61 to rotate around the central axis of the tank 1. On the other hand, through the transmission conversion of the gear-driven lead screw, the rotational power is converted into the linear reciprocating motion of the main shaft 61 along its own axial direction, thereby driving the main shaft 61 to drive the first perforated plate 2 to move smoothly back and forth along the height direction of the tank 1, realizing the linkage control of the rotation and lifting action of the first perforated plate 2. This embodiment can meet the requirements of slowly compacting the fiber bundle assembly 5 during filtration and expanding the fiber bundle assembly 5 during backwashing.

[0033] In some embodiments, the rinsing assembly 7 further includes a mixing device 72 and a liquid outlet pipe 73. The mixing device 72 has a liquid inlet, an air inlet, and a liquid outlet. The mixing device 72 is used to mix gas and liquid to form a cleaning medium with a set pressure. The liquid outlet pipe 73 connects the liquid outlet and the nozzle assembly 71. At least a portion of the liquid outlet pipe 73 is disposed in the internal cavity of the main shaft 61 along the axial direction of the main shaft 61. The nozzle assembly 71 includes a nozzle pipe 711 with a plurality of nozzles 712. The liquid outlet pipe 73 communicates with the nozzle pipe 711. The lower end of the main shaft 61 passes through the first orifice plate 2 and is positioned between the first orifice plate 2 and the second orifice plate 3 and connected to the nozzle pipe 711. The mixing device 72 is an ultrasonic pulse gas-liquid mixing device 72.

[0034] This embodiment optimizes the structure of the rinsing component 7 and combines it with ultrasonic pulse gas-liquid mixing technology to achieve efficient preparation of the cleaning medium. Simultaneously, the liquid outlet pipe 73 is integrated inside the main shaft 61, and the arrangement of the nozzle assembly 71 is optimized, allowing for smoother medium delivery and more comprehensive spraying. This effectively solves the problems of fiber bundle adhesion, backwashing flow deviation, and dead zones in traditional filters, significantly improving the cleanliness of the fiber filter media. The gas-liquid mixed cleaning medium, combined with the pulse effect, provides better removal of slime and small turbidity particles from the fiber bundles. Furthermore, the nozzle assembly 71 can move synchronously with the main shaft 61, enabling multi-angle spraying and further improving backwashing efficiency.

[0035] In this embodiment, the rinsing assembly 7 is equipped with a mixing device 72 and a liquid outlet pipe 73 in addition to the nozzle assembly 71. The mixing device 72 is generally an ultrasonic pulse gas-liquid mixing device 72. This device integrates a liquid inlet, an air inlet and a liquid outlet. The liquid inlet can be connected to a backwash water supply pipeline, and the air inlet can be connected to compressed air or external natural airflow. After the backwash water and compressed air enter the mixing device 72 from the liquid inlet and the air inlet respectively, they achieve full mixing of gas and liquid under the action of ultrasonic pulses to form a cleaning medium with a set pressure and containing microbubbles. The microbubbles can generate micro-impacts when they break during the spraying process, which can more efficiently remove stubborn impurities attached to the fiber bundle assembly 5.

[0036] One end of the liquid outlet pipe 73 is sealed to the liquid outlet of the mixing device 72, and the other end is connected to the nozzle assembly 71. At least part of the liquid outlet pipe 73 is arranged along the axial direction of the main shaft 61 in the internal cavity of the main shaft 61. This arrangement ensures that there are no exposed conveying pipes inside the tank 1, which avoids interference with the rotation and stretching deformation of the fiber bundle assembly 5 by the pipes, reduces the contact area between the pipes and raw water and impurities, reduces the risk of scaling and corrosion of the pipes, and makes the internal structure of the tank 1 simpler, which is convenient for equipment inspection and maintenance.

[0037] The nozzle assembly 71 includes a nozzle 711, on which multiple nozzles 712 are evenly distributed. The end of the outlet pipe 73 furthest from the mixing device 72 is connected to the interior of the nozzle 711, allowing the cleaning medium prepared by the mixing device 72 to be transported to the nozzle 711 via the outlet pipe 73 and evenly sprayed from the multiple nozzles 712. The lower end of the main shaft 61 passes through the first perforated plate 2 and is placed in the filter chamber 4 between the first perforated plate 2 and the second perforated plate 3. This end is fixedly connected to the nozzle 711, allowing the nozzle 711 to rotate synchronously with the rotation of the main shaft 61, driving the nozzles 712 to reciprocate and spray simultaneously with the reciprocating rotation and oscillation of the fiber bundle. It also coordinates with the continuous lifting and stretching of the fiber bundle. This effectively removes small molecule turbidity particles and slime suspensions, achieving a 98% cleaning cleanliness of the fiber filter media and completely solving the problems of fiber bundle adhesion and backwash deviation.

[0038] During backwashing, backwash water and high-pressure air are simultaneously connected to the drain outlet 12 to achieve the main rinsing of the fiber bundle. With the auxiliary rinsing of the rinsing component 7, the fiber bundle is re-rinsed. The impurities after rinsing and stripping are discharged from the inlet 11 with the water flow.

[0039] In some embodiments, the fiber bundle assembly 5 includes multiple fiber bundles, with one end of each fiber bundle connected to the first perforated plate 2 and the other end connected to the second perforated plate 3. The filter media of the fiber bundle assembly 5 is precisely selected and optimized for fixation, using FW05-1470 type cellulose filter media. The diameter of a single bundle of filter media is controlled between 100-200mm, with no pre-reserved pores between bundles, adapting to the filtration accuracy and water production requirements after compaction by the first perforated plate 2. Stainless steel hooks are provided at both ends of the fiber bundles, securely fixing them to the first and second perforated plates 2 and 3 to prevent the fiber bundles from falling off during water flow impact and deformation. During installation, the uniformity of the fiber bundles is ensured, guaranteeing consistent filter media distribution within the filtration chamber 4 and improving the overall filtration effect.

[0040] In some embodiments, the first perforated plate 2 and the second perforated plate 3 are both plate-shaped structures adapted to the cross-section of the tank 1, and multiple water passage holes are provided on the plate-shaped structures. A filter cap 8 is provided at the water passage hole on the second perforated plate 3.

[0041] In this embodiment, the first orifice plate 2 and the second orifice plate 3 are typically circular to facilitate the rotation and sealing of the first orifice plate 2. Additionally, a sealing ring is provided on the circumferential side of the first orifice plate 2 facing the inner wall of the tank 1 to prevent water from flowing through the gap between the first orifice plate 2 and the inner wall of the tank 1. The second orifice plate 3 is typically fixed to the inner wall of the tank 1.

[0042] Multiple water passage holes are provided on the plate-like structure of the first perforated plate 2 and the second perforated plate 3. The multiple water passage holes are evenly distributed in an array on the surface of their respective perforated plates, and the pore size and pore density of the water passage holes are adapted to the flow rate requirements of raw water filtration. Under filtration conditions, the clean water filtered by the fiber bundle assembly 5 can flow evenly through the water passage holes of the second perforated plate 3 to the bottom of the tank 1. Under backwash conditions, the backwash water can flow evenly through the water passage holes of the second perforated plate 3 into the filtration chamber 4. The water passage holes of the first perforated plate 2 ensure the uniform entry of raw water during filtration and the uniform discharge of impurities during backwashing. Structurally, this eliminates the problem of local water flow concentration and ensures that the fiber bundle assembly 5 is subjected to uniform force and flow at all points.

[0043] A filter cap 8 is installed at each water passage on the second perforated plate 3. The filter cap 8 is made of corrosion-resistant 316L stainless steel and is sealed and fixedly connected to the water passage of the second perforated plate 3. The filter cap 8 has an open anti-clogging structure, with an arc-shaped or stepped surface on its inlet side and multiple small filter slits, and its outlet side is connected to the water passage of the second perforated plate 3. The filter cap 8 can effectively block the fiber bundle assembly 5, preventing the fiber bundle from falling off from the water passage of the second perforated plate 3 during water flow impact or its own deformation. This solves the problem of fiber bundle falling off at the bottom after long-term operation of traditional filters, ensuring that the filtration area and filtration effect of the fiber bundle assembly 5 remain stable. At the same time, the small filter slits of the filter cap 8 can perform secondary fine filtration on the water flowing through the fiber bundle assembly 5, further intercepting tiny suspended impurities in the water that were not intercepted by the fiber bundle, further reducing the suspended solids content of the effluent. The effluent water quality can better meet the feed water requirements of the subsequent ultrafiltration reverse osmosis system, effectively protecting the subsequent membrane elements. In addition, during backwashing, the filter cap 8 can also play a role in gas-liquid mixing, enhancing the rinsing effect.

[0044] In some embodiments, the raw water filter further includes multiple diagonal braces 9 and multiple reinforcing ribs. The diagonal braces 9 are located inside the tank 1 and connect the main shaft 61 and the first perforated plate 2. The reinforcing ribs are disposed on the side of the first perforated plate 2 away from the second perforated plate 3 and are distributed radially or in a grid pattern. At least some of the reinforcing ribs are connected to the diagonal braces 9. Based on this, the reinforcing ribs can be made of 316L triangular steel plates (300mm×300mm×8mm). The multiple diagonal braces 9 adopt multiple 50mm diameter stainless steel umbrella-style support frames, forming multi-point distributed support by referencing the principle of umbrella telescopic force. This not only meets the dual action requirements of the first perforated plate 2's rotation and lifting, but also completely solves the deformation and jamming problems caused by uneven force distribution, ensuring that the water distribution uniformity error is ≤5%. This embodiment enhances the strength of the first perforated plate 2, ensuring that the first perforated plate 2 remains horizontal when moving up and down and rotating, ensuring the flatness and uniformity of fiber bundle compression.

[0045] In some specific embodiments, the metal fittings involved in this device are uniformly upgraded to 316L stainless steel, and the seals are made of corrosion-resistant fluororubber, completely solving the problem of aging and leakage of the seals. The first orifice plate 2 of the tank body 1 is coated with a combination of epoxy zinc-rich primer and fluorocarbon topcoat for corrosion protection. After the welding surface of the first orifice plate 2 is fully welded and smoothed, polymer ceramic anti-corrosion treatment is applied to areas free of impurities and localized areas, comprehensively improving the corrosion resistance of the equipment, eliminating problems such as pitting, scaling, and rust, and avoiding daily water loss.

[0046] In some specific embodiments, by adding a PLC control system, which is linked with the rotary drive component 62 and the linear drive component 63 of the drive component 6, precise coordinated control of the rotation and lifting motion of the first perforated plate 2 is achieved. The rising speed of the first perforated plate 2 is optimized to 0.1m / s and the rotation speed is 5r / min, so that the twisting and squeezing of the fiber bundle component 5 is more uniform under filtration conditions and the expansion is more complete under backwashing conditions, thus solving the problems of uneven shrinkage and incomplete cleaning of filter media in traditional equipment.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A raw water filter, characterized in that, include: The tank body has a water inlet on the upper side wall and a drain outlet at the bottom. A first orifice plate and a second orifice plate are arranged perpendicular to the central axis of the tank and spaced apart inside the tank along the central axis of the tank, forming a filter chamber at the interval. The first orifice plate is located above the second orifice plate and is adapted to the height position of the water inlet. The first orifice plate can reciprocate along the height direction of the tank and can rotate around the central axis of the tank. A fiber bundle assembly is disposed between a first perforated plate and a second perforated plate, wherein rotation and / or movement of the first perforated plate can deform the fiber bundle assembly to change the porosity of the fiber bundle assembly; A drive assembly, the drive assembly including a main shaft arranged along the central axis of the tank, the lower end of the main shaft being connected to the first perforated plate, so that the main shaft drives the first perforated plate to rotate and reciprocate along the height direction of the tank; A rinsing assembly, comprising a nozzle assembly disposed in the filter chamber and used to spray a cleaning medium to clean impurities on the fiber bundle assembly.

2. The raw water filter according to claim 1, characterized in that, The driving component also includes: A rotary drive component is mounted on the outer wall of the tank and has a rotatable power output end. A linear drive component is provided, which connects the power output end and the upper end of the main shaft. It is used to transmit the rotational motion of the power output end to the main shaft and simultaneously drive the main shaft to move the first perforated plate back and forth along the height direction of the tank.

3. The raw water filter according to claim 1, characterized in that, The flushing assembly also includes: A mixing device having a liquid inlet, an air inlet, and a liquid outlet, the mixing device being used to mix gas and liquid to form a cleaning medium with a set pressure; A liquid outlet pipe, the liquid outlet pipe connecting the liquid outlet and the nozzle assembly, at least a portion of the liquid outlet pipe being disposed in the internal cavity of the main shaft along the axial direction of the main shaft.

4. The raw water filter according to claim 3, characterized in that, The nozzle assembly includes a nozzle with multiple nozzles, the liquid outlet pipe is connected to the nozzle, and the lower end of the main shaft passes through the first orifice plate and is positioned between the first orifice plate and the second orifice plate and connected to the nozzle.

5. The raw water filter according to claim 3, characterized in that, The mixing device is an ultrasonic pulse gas-liquid mixing device.

6. The raw water filter according to claim 1, characterized in that, The fiber bundle assembly includes multiple fiber bundles, with one end of each fiber bundle connected to the first perforated plate and the other end connected to the second perforated plate.

7. The raw water filter according to claim 1, characterized in that, Both the first orifice plate and the second orifice plate are plate-shaped structures adapted to the cross-section of the tank, and the plate-shaped structures are provided with multiple water passage holes.

8. The raw water filter according to claim 7, characterized in that, A filter cap is provided at the water passage hole located on the second perforated plate.

9. The raw water filter according to claim 1, characterized in that, A sealing ring is provided on the circumferential side of the first perforated plate facing the inner wall of the tank.

10. The raw water filter according to claim 1, characterized in that, Also includes: Multiple diagonal braces are located inside the tank and connect the main shaft and the first perforated plate. Multiple reinforcing ribs are provided on the side of the first perforated plate away from the second perforated plate and are distributed radially or in a grid pattern. At least some of the reinforcing ribs are connected to the diagonal brace.

Images