Integrated filtering system

Abstract

The invention relates to an integrated filtering system which comprises a front filtering unit and a rear filtering unit, the front filtering unit is a coarse screen device, and the rear filtering unit comprises a rotary filtering mechanism and a sludge circulation assembly; a working pit is formed in the ground, a primary filter tank is fixed in the working pit, a net-shaped partition plate for preventing falling is laid on the working pit, and the other part of the first chain grating mechanism is located in the primary filter tank and stands on the ground; a water outlet pipe of the preliminary filter conveys water to a rear filter unit through a water pump; the water collecting hopper is erected on the second chain grating mechanism; the sludge circulation assembly comprises a pre-filtering part, a first sliding part, a telescopic supporting part, a posture adjusting part and a dust collecting part, and the pre-filtering part is arranged below the water collecting hopper; the first sliding part is arranged above the water collecting hopper, and the telescopic supporting part comprises a supporting frame and a telescopic sleeve; the posture adjusting part comprises a mechanism for enabling the water collecting hopper to pitch up and down; the dust collection part comprises a dust collection box with pulleys, and the dust collection box is used for receiving sludge poured out of the water collection hopper.

Description

TECHNICAL FIELD

[0001] The present application relates to water treatment equipment, in particular to a filtering equipment. BACKGROUND

[0002] The rotary filtering equipment, namely the rotary belt microsieve filtering equipment, is an equipment that filters pollutants in water in a rotating manner. It is usually referred to as a conveyor belt or a chain sprocket structure to filter water in a circulating manner. This is an equipment that is named and described from the technical principle. From the water unit itself, it is generally named by use or purpose, such as coarse grating and fine grating. The structures of the coarse grating and the fine grating are basically the same. Taking the fine grating as an example, the common ones are rotary and chain type. Both of them take the grating bar spacing as the filtering index. The purpose of the fine grating equipment is consistent with that of the rotary filtering equipment, and the technical principles are also similar.

[0003] The fine grating is widely used in water treatment and serves as a pre-filtering means. The difference between the coarse grating and the fine grating lies only in the size of the grating bar spacing. Whether it is the coarse grating or the fine grating, the most common chain type is simple in structure and widely welcomed, but the part of the chain is arranged underground in the plant and is sunk in the coarse grating pipeline. When maintaining, it needs to be lifted out of the ground using lifting tools or equipment, which is inherently deficient in maintenance convenience.

[0004] The existing rotary filtering equipment is compact in structure and does not need to be arranged underground, but the volume is limited and the daily processing capacity is significantly less than that of the existing fine grating, so that the rotary filtering equipment is currently used as a supplementary filtering means for the fine grating. In recent years, there is a trend of gradually replacing the fine grating. Therefore, it is necessary to improve the rotary filtering equipment to meet the actual needs, promote technological progress, increase the filtering processing capacity, solve the deficiencies of the rotary filtering equipment, and further reduce the maintenance difficulty and cost. SUMMARY

[0005] To solve the above technical problems, an integrated filtering system is provided. The technical solution is as follows. It comprises a pre-filtering unit and a post-filtering unit. The pre-filtering unit is a coarse grating device, and the post-filtering unit comprises a rotary filtering mechanism and a sludge flow component.

[0006] A working pit is formed on the ground where the coarse grating device is located. A preliminary filter tank is fixed in the working pit. A mesh partition plate is laid on the working pit to prevent falling. Part of the first chain grating mechanism of the coarse grating device is sunk in the preliminary filter tank, and the other part of the first chain grating mechanism passes through the mesh partition plate and stands on the ground through the rack. The water inlet pipe of the preliminary filter tank is connected from outside the working pit, and the water outlet pipe of the preliminary filter tank extends from the working pit to the outside and is delivered to the post-filtering unit through the water pump.

[0007] The water collection hopper of the rotary filter mechanism is mounted on the second chain grid mechanism via a sludge transfer assembly. The sludge transfer assembly includes a pre-filtration section, a first sliding section, a telescopic support section, a posture adjustment section, and a dust collection section. The pre-filtration section is located below the water collection hopper and is used to pre-filter the wastewater that has been initially filtered by the pre-filtration unit.

[0008] The first sliding part is set above the water collection hopper via the frame. The telescopic support part includes a support frame and a telescopic sleeve that are connected end to end. The support frame can slide horizontally under the drive of the first sliding part. The telescopic sleeve is hinged to the water collection hopper.

[0009] The attitude adjustment unit includes a mechanism that enables the water collection bucket to tilt up and down, and by cooperating with the first sliding part, a movement stroke is constructed to allow the water collection bucket to pour out sludge. The water collection bucket can change its position and attitude along the movement stroke to pour out the sludge inside.

[0010] The telescopic sleeve is equipped with a limiting measure to restrict separation. The water collection hopper can achieve a certain degree of lifting and lowering movement through the telescopic sleeve to keep the sludge from spilling out during the movement stroke. The dust collection part includes at least a dust collection box with pulleys, which is used to receive the sludge poured out of the water collection hopper.

[0011] Based on the above technical solution, the first sliding part includes a chain and sprocket mechanism.

[0012] Based on the above technical solution, the first sliding part includes an electric heavy-duty track.

[0013] Based on the above technical solution, the attitude adjustment unit includes a guide rack and a guide gear. The guide rack is set on the upper sides of the water collection bucket via the frame, and the guide gear is rotatably set on the outer wall of the telescopic sleeve via a rotating shaft. The guide gear and the guide rack are always meshed. The pitch attitude of the water collection bucket during its movement is changed by designing the direction of the guide rack on the vertical plane.

[0014] Based on the above technical solution, a partition wall is provided between the second chain grid mechanism and the dust collection box. The partition wall has through holes, and the mud guide plate of the sludge scraping assembly of the rotary filter mechanism extends through the through holes to the dust collection box to guide the mud.

[0015] Based on the above technical solution, the partition wall is equipped with an upper backwash assembly and a lower backwash assembly via a frame. Both the upper and lower backwash assemblies use water spraying to achieve backwashing. The lower backwash assembly is used to backwash the second chain grid mechanism after sludge scraping, and the upper backwash assembly is used to backwash the water collection hopper after the sludge has been dumped.

[0016] Based on the above technical solution, the pre-filtration section includes a variable mesh device, which includes a multi-layer plate, a second sliding part, and multiple filter plates. The multi-layer plate is located at the bottom of the water collection hopper away from the water inlet direction of the pre-filtration unit and forms a filter outlet with the inner wall of the water collection hopper. Multiple groove-shaped filter chambers are opened inside the multi-layer plate, and filter plates are inserted in the filter chambers. The filter chambers have openings facing the water outlet for the filter plates to enter and exit. The second sliding part is located on the outer wall of the water collection hopper. The side wall of the water collection hopper has a sliding groove extending along the length of the water collection hopper and communicating with the filter chamber. The second sliding part controls the filter plates to slide between the water outlet and the filter chamber through the sliding groove via a control mechanism.

[0017] Based on the above technical solution, the second sliding part includes a linear motion mechanism and a control mechanism. The control mechanism includes a control plate and an electromagnetic chuck. The control plate is driven by the linear motion mechanism to move along the slide groove direction. The electromagnetic chuck is set on the control plate and contacts the filter plate. The outer wall of the filter plate is wrapped with a steel edging.

[0018] Based on the above technical solution, the linear motion mechanism is an electric slide rail.

[0019] Based on the above technical solution, the linear motion mechanism is an electric telescopic mechanism.

[0020] Based on the above technical solutions, the mesh size of different filter plates is different.

[0021] Beneficial effects: By combining the existing coarse screen as the main structure of the pre-filter unit and the existing rotary filter mechanism as the main structure of the post-filter unit, and by making adaptive improvements to the combination, an integrated filtration solution is formed for overall deployment, which reduces the footprint, makes full use of the space of the original coarse screen plant, and improves the space utilization rate.

[0022] By combining the improved optional filtration mechanism with the improved coarse screen, the original scheme of building separate fine and coarse screens in separate plants was replaced. Fine filtration was carried out immediately after the coarse screen filtration, and most of the water company's preliminary filtration work was completed at the coarse screen.

[0023] The improved coarse screen structure is simplified, replacing the original water conveyance channel with a preliminary filter bed installed within the original water conveyance or inlet channel. The working status of the preliminary filter bed can be monitored in real time, allowing for timely response and rapid handling of any problems. Multiple preliminary filters can be constructed as needed, activating those that are normally idle during peak water usage and engaging only a portion during off-peak periods. The improved rotary filtration mechanism creatively adds a pre-filtration section within the collection hopper for further pre-filtration, working in conjunction with the second chain screen mechanism for dual filtration. A sludge transfer mechanism can also be used to clean the sludge in the collection hopper at any time, increasing water treatment capacity.

[0024] Through the variable mesh device in the pretreatment section, different filter plates can be combined into multiple sets of variable pore sizes through their own mesh structure, which can adapt to different filtration needs very well. Attached Figure Description

[0025] Figure 1 This is a side sectional view of the overall structure of the present invention.

[0026] Figure 2 This is a front sectional view of the overall structure of the present invention.

[0027] Figure 3 This is a three-dimensional schematic diagram of the overall structure of the present invention.

[0028] Figure 4 For the present invention Figure 3 A simplified three-dimensional schematic diagram of the overall structure.

[0029] Figure 5 For the present invention Figure 1 A partially enlarged cross-sectional schematic diagram of the water collection bucket's motion stroke.

[0030] Figure 6 For the present invention Figure 1 A partially enlarged cross-sectional schematic diagram of the water collection hopper in an overturned state.

[0031] Figure 7 This is a structural schematic diagram showing the installation position of the variable mesh sieve device of the present invention.

[0032] Figure 8 This is a schematic cross-sectional view of the mesh size of the multiple filter plates of the present invention.

[0033] Figure 9 For the present invention Figure 7 A magnified view of a portion of the image.

[0034] Figure 10 For the present invention Figure 9 A diagram illustrating the usage status.

[0035] Figure 11 For the present invention Figure 9 A three-dimensional schematic diagram.

[0036] Figure 12 For the present invention Figure 10 A three-dimensional schematic diagram.

[0037] Figure 13 This is a schematic cross-sectional view illustrating the principle of the variable mesh screen technology of the present invention.

[0038] Figure 14 This is a three-dimensional schematic diagram of the installation state of the multilayer board and filter board of the present invention. Detailed Implementation

[0039] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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 the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0042] In embodiments of the present 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," "on top of," and "over" 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.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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. 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.

[0044] like Figure 1 As shown, in this embodiment, the coarse screen is used as the pre-filter unit 1, and the rotary filter mechanism 3 is used as the main structure of the post-filter unit 2. The two are integrated together to form an integrated structure. As a whole, it can completely replace the fine screen, directly utilize the factory space of the coarse screen, and save space.

[0045] exist Figure 1 In this project, limited modifications were made to the coarse screen plant while maintaining the basic structure and function of the coarse screen. Regarding the site, the original inlet channel was sealed to create a working pit 4. A preliminary filter 5 was installed within the working pit 4, and a mesh partition 6 was laid on the preliminary filter 5 to prevent workers from falling. Additionally, adding lighting fixtures to the mesh partition 6 allows for real-time monitoring of the preliminary filter 5, addressing the previous issue of the coarse screen's inability to monitor its real-time operation. Before the coarse screen modification, the water company introduced untreated wastewater into the inlet channel. After the modification, this untreated wastewater is introduced into the preliminary filter 5 through the inlet pipe 8. The first chain screen mechanism 7 of the original coarse screen is inserted into the working pit 4 and submerged in the water of the preliminary filter 5. The first chain screen mechanism 7 functions in the preliminary filter 5 in the same way it did in the inlet channel, filtering out high-particle waste such as plastic bags and weeds. The water filtered by the coarse screen is introduced into the post-filtration unit 2 through the outlet pipe 9.

[0046] The overall structure of the post-filtration unit 2 is still based on the existing rotary filter mechanism 3, but with improvements aimed at increasing sludge removal. Before the improvement, the rotary filter mechanism 3 relied on scrapers and guide plates located below the second chain grid mechanism 18 to continuously discharge sludge. However, a certain amount of sludge always accumulated in the water collection hopper 13, resulting in a water treatment capacity that was always less than the average daily treatment capacity of a fine grid of the same volume. To solve this problem, this embodiment provides a sludge transfer assembly. The core improvements of the sludge transfer assembly are: 1. a pre-filtration section; 2. a series of functional parts for dumping the accumulated waste in the water collection hopper 13. In this embodiment, a pre-filtration section is creatively set at the bottom of the water collection hopper 13 (or water collection bar, water-blocking frame, water-binding bar, etc.). The pre-filtration section is used to filter larger particles of sludge, wood, plastic, metal parts, etc. The pre-filtration section blocks larger particles of waste, which are then further filtered by the second chain grid mechanism 18. This dual filtration effect can replace the fine grid. The pre-filtration section can employ any method capable of intercepting large particles of waste that the coarse screen cannot block, such as a screen plate or mesh plate with a mesh size smaller than the coarse screen but larger than the existing fine screen. After the large particles of waste are intercepted in the pre-filtration section, the wastewater entering the second chain screen mechanism 18 can be discharged at a faster rate. In this embodiment, the dust collection section can adopt any feasible method to accept sludge, such as a dust collection box or dust collection bucket with rollers, as long as it can hold sludge. Other structures besides the box and cylinder structures are also acceptable.

[0047] When the waste in the water collection hopper 13 needs to be cleaned, the first sliding part 10 is activated, driving the telescopic support part 11 to move the water collection hopper 13 away from the water inlet direction. Simultaneously, with the adjustment of the attitude adjustment part, the water collection hopper 13 is adjusted from its original working angle to an angle ready to dump waste. When the water collection hopper 13 reaches the end of its stroke, its angle is just right to dump the waste into the dust collection part 12 for collection. The water collection hopper 13 is then driven to move in the opposite direction back to its initial working position and stops, thus completing one sludge and waste cleaning process. The telescopic support part 11 consists of a support frame 14 and a telescopic sleeve 15. One end of the support frame 14 is connected to the first sliding part 10, and the other end is connected to the telescopic sleeve 15. The other end of the telescopic sleeve 15 is hinged to the top of the water collection hopper 13. The telescopic sleeve 15 must have limiting measures to prevent separation and disintegration. The purpose of setting the telescopic sleeve 15 in this embodiment is because it is recognized that the movement of the water collection hopper 13 is divided into different stages. In the initial stage, it separates from the dense structure such as the second chain grid mechanism 18 and the outlet pipe 9 of the pre-filter unit 1. Therefore, the movement of the water collection hopper 13 in the initial stage must be relatively smooth and straight. In the middle stage, since the angle adjustment is necessary, the height of the water collection hopper 13 must be increased. Therefore, the water collection hopper 13 needs to be raised in the middle stage. At this time, the telescopic sleeve 15 can perform a certain telescopic movement to better keep the water collection hopper 13 in a horizontal or near-horizontal state, and prevent the water collection hopper 13 from spilling sludge before reaching the end of the stroke. In this embodiment, the telescopic sleeve 15 achieves a certain degree of lifting and lowering movement, which is determined based on the movement stroke of the water collecting hopper 13. The angles of the front and rear ends of the water collecting hopper 13 can be determined by simulating the movement trajectory of the water collecting hopper 13. By setting the extension stroke of the telescopic sleeve 15 in advance, the problem of sludge spillage caused by excessive angle of the water collecting hopper 13 can be avoided or alleviated. Therefore, the certain degree of lifting and lowering movement mentioned in this embodiment refers to the telescopic sleeve 15 having a certain extension stroke, which can be obtained directly or indirectly through a limited number of experiments.

[0048] Limited by the limited space of the rotary filter mechanism 3, and also by the large size of the water collection hopper 13, making it difficult to completely tilt and dump the sludge, such as Figures 5 to 6 As shown, the water collection hopper 13 should be swung until most of the sludge flows out. It should be noted that... Figures 5 to 6 The tilting angle shown is based on the shape and structure of the irregularly shaped water collection hopper 13, which is deeper at the back and shallower at the front, similar to the shape of a dump truck hopper. Therefore, it is not necessary to completely flip the water collection hopper 13 to dump the sludge. Through the sludge transfer component, on-demand and rapid sludge removal is achieved, increasing the daily wastewater treatment capacity, which is an important condition for its ability to replace traditional fine screens.

[0049] like Figures 1 to 6As shown, there are generally four telescopic sleeves 15 connected to the water collection hopper 13, namely four sets of telescopic support parts 11, which are respectively arranged at the four corners near the edge of the water collection hopper 13, so as to achieve the best stability.

[0050] The first sliding part 10 is used to directly drive the telescopic support part 11 to slide, and indirectly drive the water collecting hopper 13 to slide. It can achieve the above-mentioned functions and uses using any feasible solution, but the water collecting hopper 13 is generally made of metal, resulting in a large weight. Therefore, an electric heavy-duty track or chain and sprocket mechanism is preferred. Taking a chain and sprocket as an example... Figure 1 to Figure 6 As shown, the chain and sprocket mechanism is located at the top, and a truss or bracket is located in the middle and connected to the chain. Support frames 14 and telescopic sleeves 15 are installed on both sides of the truss. Two trusses are installed below the chain, and each truss has two telescopic support parts 11 at both ends. This achieves the effect that only one first sliding part 10 is needed to drive the movement of four sets of telescopic support parts 11.

[0051] In this embodiment, to prevent splashing generated by the scraper blade during sludge scraping, a partition wall 19 or partition plate is provided between the second chain grid mechanism 18 and the dust collection box. A through hole is provided on the partition wall 19 for the guide plate to pass through, allowing the sludge scraped by the scraper blade to be poured into the dust collection section 12 via the guide plate. Based on the partition wall 19, to provide better sludge cleaning effect, an upper backflushing assembly and a lower backflushing assembly are respectively provided on the partition wall 19. Both are fixed to the partition wall 19 by a frame. The upper and lower backflushing assemblies have the same structure; both use a water pump to spray water from the nozzle to clean the target object in the reverse direction. The upper backwash assembly is aligned with the tilted water collection hopper 13 and sprays water from the bottom of the water collection hopper 13 to rinse the pre-filter section and remove the sludge stuck on the pre-filter section; the lower backwash assembly is used to rinse the second chain grid mechanism 18, which can be backwashed by extending from the partition wall 19 to the relative inner side of the chain of the second chain grid mechanism 18 through the frame, and the sludge backwashed can also be poured into the dust collection section 12 through the mud guide plate.

[0052] In some embodiments, the attitude adjustment unit can employ any feasible method to adjust the pitch angle of the water collection hopper 13 during its movement stroke. In this embodiment, a gear and rack mechanism is preferred. The gear and rack mechanism is a passive method for adjusting the attitude angle of the water collection hopper 13. It is a method that passively adjusts the attitude angle of the water collection hopper 13 during its movement after the activation of the first sliding part 10. Since the telescopic support frame 14 only provides a limited telescopic stroke, it cannot provide telescopic extension when the telescopic sleeve 15 reaches its maximum telescopic stroke. As the guide gear 17 on the outer wall of the telescopic sleeve 15 slides on the guide rack 16, it causes the water collection hopper 13 to gradually rise, and the height of the front part of the water collection hopper 13 gradually becomes higher than the height of the rear part containing sludge. When the water collection hopper 13 is about to reach the end of its stroke and is partially above the dust collection part 12, the guide rack 16 extends downward at a large angle in an arc shape, causing the front part of the water collection hopper 13 to suddenly begin to be in a downward diving posture and angle, pouring the sludge loaded in the rear part of the water collection hopper 13 into the dust collection part 12. When the water collection hopper 13 is at the end of its stroke, it is at its maximum tilting angle. After maintaining this tilting angle for a period of time, ensure that the sludge has completely or mostly flowed out of the water collection hopper 13, and then repeat the reverse stroke of the water collection hopper 13 to reset it.

[0053] In this embodiment, in addition to the preferred passive scheme of guide gear 17 and guide rack 16, an active attitude adjustment scheme can also be adopted. For example, an active telescopic mechanism or an active linear motion mechanism can be set outside each telescopic sleeve 15. The direction of telescopic or linear motion is consistent with the direction of telescopic sleeve 15. At the same time, the direct connection between the telescopic sleeve 15 and the water collection hopper 13 is disconnected and replaced by a hinged connection between the telescopic sleeve 15 and the water collection hopper 13 through an active telescopic mechanism or an active linear motion mechanism. For example, the electric screw mechanism is fixed on the outer wall of the telescopic sleeve 15, and its telescopic screw is connected to the water collection hopper 13 through a hinge. By controlling the telescopic movement of the electric screw mechanism, the attitude angle of the water collection hopper 13 can be adjusted. This scheme can achieve more precise and free control of the water collection hopper 13, so that the water collection hopper 13 can better maintain a horizontal state in the middle of the movement stroke, and the sludge inside will not spill out.

[0054] In other embodiments, a variable mesh screen device is provided as a preferred option for the pre-filtration section. In this embodiment, to ensure that the water treatment volume remains constant or substantially consistent, the length and width of the water collection hopper 13 are increased, and its height is also increased, so that the size of the water collection hopper 13 in this embodiment is larger than that in other embodiments.

[0055] The multi-layer plate 20 of the variable mesh screen device is located at the bottom of the water collection plate. The multi-layer plate 20 covers part of the space at the bottom of the water collection plate, which is compensated by increasing the size of the water collection hopper 13. The filter chamber on the multi-layer plate 20 is used to accommodate the filter plate 21. When needed, the filter plate 21 is slid out from the opening of the filter chamber through the second sliding part 23. The filter plate 21 slides to the water outlet 26 to collect and filter the sewage containing large particles of sludge.

[0056] like Figures 7 to 13 As shown, the multi-layer plate 20 is equipped with multiple filter chambers, and the filter plates 21 in the filter chambers have different mesh sizes, such as... Figure 8 and Figure 13 As shown, Figure 8 The differences in pore size and density between the filter plates 21 are shown. The pore size gradually decreases from top to bottom, with the top filter plate 21 having the largest pore size and the bottom filter plate 21 having the smallest pore size. It should be noted that even the filter plate 21 with the smallest pore size only filters the material before it enters the second chain grid mechanism 18. The pore size of the pre-filtration section is larger than that of the second chain grid mechanism 18. It should also be noted that the structure of the rotary filter mechanism 3 remains basically unchanged in this embodiment and other embodiments, with only minor modifications. However, the use of the structural name "chain grid" for the rotary filter mechanism 3 before the modification does not mean that this embodiment and all other embodiments use a traditional large-spaced, large-diameter, large-pore chain as the filtration method. It can also be a chain screen with a higher density, or other structures.

[0057] like Figure 13 As shown, the principle of the variable mesh size device is illustrated. In this embodiment, the filter plate 21 uses traditional physical interception for filtration. The mesh structure or grid structure of each filter plate 21 remains unchanged. Therefore, driven by the second sliding part 23, different filter plates 21 can combine to form multiple sets of variable filter apertures through their own mesh structures. Figure 13For example, the filter channel A100 of the top filter plate 21 is labeled, the filter channel B200 of the middle filter plate 21 is labeled, and the filter channel C300 of the bottom filter plate 21 is labeled. Assuming the pore size of filter channel A100 is 1000, the pore size of filter channel B200 is 500, and the pore size of filter channel C300 is 250, by sliding filter channel B200, filter channels A100 and B200 are combined to create a fine sieving scheme that transitions from a sieve pore size of 1000 to 500. Furthermore, by combining filter channels B200 and C300, a fine sieving scheme with a pore size significantly smaller than 250 is obtained, achieving a filtration effect better than a fine screen. During peak water usage periods, only filter plate 21 with filter channel A100 can be used to improve filtration efficiency. The variable mesh device can be selected by the user according to their needs. Based on this, the number of rotary filter mechanisms 3 is increased to form a combination of a pre-filter unit 1 and multiple post-filter units 2, forming an integrated grid filtration solution with variable mesh size. This not only ensures the treatment efficiency during peak water usage periods but also helps to meet increasingly stringent environmental protection requirements for water treatment.

[0058] A chute 22 is provided on the outer wall of the water collection hopper 13. The chute 22 is connected to the filter chamber. Both ends of the filter plate 21 are located in the chute 22. Throughout the process of the filter plate 21 sliding out of the filter chamber, both ends of the filter plate 21 are located in the chute 22, which makes the filter plate 21 more stable when sliding and better able to cope with the impact of water flow during operation, thus maintaining a stable working state.

[0059] Both the second sliding part 23 and the first sliding part 10 have linear motion mechanisms, but the second sliding part 23 requires higher sliding precision, and therefore preferably uses an electric telescopic mechanism, such as an electric cylinder or an electric slide rail. The control mechanism of the second sliding part 23 can, as needed, activate the electromagnetic chuck 25 on the control board 24 to attract the steel edge of the filter plate 21, thereby moving the designated filter plate 21. Figure 7 , Figures 9 to 12 As shown, the control board 24 is equipped with multiple electromagnetic chucks 25, each electromagnetic chuck 25 corresponding to a filter plate 21. To use a particular filter plate 21, simply activate the corresponding electromagnetic chuck 25.

[0060] In this embodiment, unless there is a special requirement, the mesh size of the filter plate 21 is basically larger than that of the existing coarse grid filter. By combining the variable mesh device with the second chain grid mechanism 18, the filter size can be smaller than or equal to that of the fine grid, and the filtration efficiency can be basically the same. This is the optimal solution for cost control. However, this embodiment still retains the potential to improve filtration precision. To better control the combination of different filter plates 21 into the required filter channel combination, threaded through holes can be opened on the top and bottom edges of the water collection hopper 13, and also on the rear edge of the water collection hopper 13. The method of use is as follows: after the control mechanism drives the filter plate 21 to its position, disconnect the power to the electromagnetic chuck 25 to shut it off; use a threaded positioning rod to insert it into the threaded through holes at the top and bottom of the water collection hopper 13 to fix the top and bottom filter plates 21 with the threaded positioning rod, and then use the threaded positioning rod to insert it into the threaded through hole at the rear of the water collection hopper 13; simultaneously, slightly loosen the threaded positioning rods at the top and bottom, while the threaded positioning rod at the rear of the water collection hopper 13 can be manually controlled by tightening and loosening the threaded positioning rod. During manual control, the displacement of the filter plate 21 is measured by an auxiliary laser rangefinder, which can better determine the position of the filter plate 21. However, it should be noted that the threaded through holes located at the rear of the water collection hopper 13 are only opened at the top and bottom sliding grooves 22. The filter plate 21 in the middle position is controlled by the second sliding part 23. After the position of the filter plate 21 in the middle position is determined, the positions of the other filter plates 21 are manually adjusted based on it.

Claims

1. An integrated filtration system, characterized in that, It includes a pre-filter unit and a post-filter unit. The pre-filter unit is a coarse screen device, and the post-filter unit includes a rotary filter mechanism and a sludge transfer assembly. A working pit is provided in the ground where the coarse screen device is located. A primary filter tank is fixed in the working pit. A mesh partition is laid on the working pit to prevent people from falling in. A part of the first chain screen mechanism of the coarse screen device is submerged in the primary filter tank, and the other part of the first chain screen mechanism passes through the mesh partition and stands on the ground through the frame. The water inlet pipe of the primary filter tank is connected from outside the working pit, and the water outlet pipe of the primary filter tank extends from inside the working pit to the outside and is pumped to the post-filter unit. The water collection hopper of the rotary filter mechanism is mounted on the second chain grid mechanism via a sludge transfer assembly. The sludge transfer assembly includes a pre-filtration section, a first sliding section, a telescopic support section, a posture adjustment section, and a dust collection section. The pre-filtration section is located below the water collection hopper and is used to pre-filter the wastewater that has been initially filtered by the pre-filtration unit. The first sliding part is set above the water collection hopper via the frame. The telescopic support part includes a support frame and a telescopic sleeve that are connected end to end. The support frame can slide horizontally under the drive of the first sliding part. The telescopic sleeve is hinged to the water collection hopper. The attitude adjustment unit includes a mechanism that enables the water collection bucket to tilt up and down, and by cooperating with the first sliding part, a movement stroke is constructed to allow the water collection bucket to pour out sludge. The water collection bucket can change its position and attitude along the movement stroke to pour out the sludge inside. The telescopic sleeve is equipped with a limiting measure to restrict separation. The water collection hopper can achieve a certain degree of lifting and lowering movement through the telescopic sleeve to keep the sludge from spilling out during the movement stroke. The dust collection part includes at least a dust collection box with pulleys, which is used to receive the sludge poured out of the water collection hopper.

2. The integrated filtration system as described in claim 1, characterized in that, The first sliding part includes a chain and sprocket mechanism.

3. The integrated filtration system as described in claim 1, characterized in that, The first sliding section includes an electrically powered heavy-duty track.

4. The integrated filtration system as described in claim 1, characterized in that, The attitude adjustment unit includes a guide rack and a guide gear. The guide rack is mounted on the upper sides of the water collection bucket via the frame, and the guide gear is mounted on the outer wall of the telescopic sleeve via a rotating shaft. The guide gear and the guide rack are always meshed. The pitch attitude of the water collection bucket during its movement is changed by designing the direction of the guide rack on the vertical plane.

5. The integrated filtration system as described in any one of claims 1 to 4, characterized in that, A partition wall is provided between the second chain grid mechanism and the dust collection box. The partition wall has through holes, and the mud guide plate of the sludge scraping assembly of the rotary filter mechanism extends through the through holes to the dust collection box to guide the mud.

6. The integrated filtration system as described in claim 5, characterized in that, The partition wall is equipped with an upper backwash assembly and a lower backwash assembly via a frame. Both the upper and lower backwash assemblies use water spraying to achieve backwashing. The lower backwash assembly is used to backwash the second chain grid mechanism after sludge scraping, while the upper backwash assembly is used to backwash the water collection hopper after sludge has been dumped.

7. The integrated filtration system as described in claim 1, characterized in that, The pre-filtration section includes a variable mesh screen device, which comprises a multi-layer plate, a second sliding part, and multiple filter plates. The multi-layer plate is located at the bottom of the water collection hopper away from the water inlet direction of the pre-filtration unit and forms a filter outlet with the inner wall of the water collection hopper. Multiple groove-shaped filter chambers are opened inside the multi-layer plate, and filter plates are inserted into the filter chambers. The filter chambers have openings facing the water outlet for the filter plates to enter and exit. The second sliding part is located on the outer wall of the water collection hopper, and a sliding groove extending along the length of the water collection hopper is opened on the side wall of the water collection hopper. The sliding groove communicates with the filter chamber. The second sliding part controls the filter plates to slide between the water outlet and the filter chamber through the sliding groove via a control mechanism.

8. The integrated filtration system as described in claim 7, characterized in that, The second sliding part includes a linear motion mechanism and a control mechanism. The control mechanism includes a control plate and an electromagnetic chuck. The control plate is driven by the linear motion mechanism to move along the slide groove. The electromagnetic chuck is set on the control plate and contacts the filter plate. The outer wall of the filter plate is wrapped with a steel edging.

9. The integrated filtration system as described in claim 8, characterized in that, The linear motion mechanism is an electric slide rail.

10. The integrated filtration system as described in claim 8, characterized in that, The linear motion mechanism is an electric telescopic mechanism.

11. The integrated filtration system according to any one of claims 7 to 10, characterized in that, Different filter plates have different mesh sizes.

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