A kind of anti-blocking multi-medium filter suitable for high viscosity high turbidity wastewater

Abstract

This utility model relates to the field of wastewater treatment equipment, and more particularly to an anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater. It includes a filter tank, an upper inlet pipe, a lower connecting pipe, a support column, a shaking screening mechanism, and a tapping cleaning mechanism. The upper inlet pipe is fixedly connected to the upper surface of the filter tank. This utility model incorporates a shaking screening mechanism and a tapping cleaning mechanism on top of a conventional filtration and backwashing valve system. The shaking screening mechanism utilizes mechanical vibration to effectively break up stubborn contaminant layers. The tapping cleaning mechanism uses water-driven tapping plates to pre-disperse contaminants during filtration and enhance turbulence during backwashing. This forms a multi-level cleaning method combining hydraulic flushing with mechanical vibration and tapping. Compared to traditional filters, its backwashing is more thorough, effectively solving the clogging problem of high-viscosity, high-turbidity wastewater filtration, and improving the operational stability of the equipment and the service life of the filter media.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment, and in particular to an anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater. Background Technology

[0002] Multi-media filters are a common and important solid-liquid separation device in the field of water treatment. They typically fill the filter tank with two or more filter media of different particle sizes and densities, such as anthracite, quartz sand, and gravel, arranged from top to bottom in order of increasing particle size. When the water to be treated flows through the filter layers, suspended solids, particulate matter, and other impurities in the water are trapped layer by layer, thereby achieving water purification.

[0003] However, when treating high-viscosity, high-turbidity industrial wastewater (such as dyeing and printing wastewater, chemical wastewater, and some food processing wastewater), existing multi-media filters have revealed a series of serious defects. First, due to the high concentration and viscous nature of suspended solids in the wastewater, the surface filter media is prone to caking and sticking within a short period of time, forming a dense sludge cake that quickly blocks the filtration channels, leading to a sharp increase in head loss and a significantly shortened filtration cycle.

[0004] Secondly, traditional backwashing methods are ineffective in solving this problem. High-viscosity media weaken the impact and shear forces of the backwash water flow, preventing the water from fully and evenly fluidizing the entire filter bed and making it difficult to completely break up and peel off the caked filter media layer. This often leads to incomplete backwashing, forming "channels" or "mud balls," making the filter media dirtier with each wash, shortening the filtration cycle, and even causing it to completely lose its filtration capacity within a short period, severely impacting production continuity and processing efficiency.

[0005] Therefore, it is necessary to provide a new anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater.

[0007] This utility model provides an anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater, comprising: a filter tank, an upper inlet pipe, a lower connecting pipe, support columns, a shaking screening mechanism, and a tapping cleaning mechanism. The upper inlet pipe is fixedly connected to the upper surface of the filter tank, and two branch pipes are provided on the upper inlet pipe. A positive inlet valve and a backflow valve are respectively installed on the two branch pipes. The lower connecting pipe is fixedly connected to the lower surface of the filter tank, and two branch pipes are provided on the lower connecting pipe. A backwash valve and a positive flow valve are respectively installed on the two branch pipes. Two symmetrically distributed support columns are fixedly connected to the lower surface of the filter tank. The shaking screening mechanism is provided inside the filter tank. The shaking screening mechanism includes an upper fixed plate, an annular plate, a limiting plate, a spring, a sliding rod, and a lower fixed plate. Two symmetrically distributed upper and lower fixed plates are fixedly connected to the upper and lower ends of the inner wall of the filter tank. Sliding rods are fixedly connected to the lower surface of the upper fixed plate and the upper surface of the lower fixed plate. The two ends of the two annular plates are respectively sleeved on the surfaces of the upper and lower sliding rods and slidably connected to them. A limiting plate is fixedly connected to the outer end of the sliding rod, and springs are sleeved on the surface of the sliding rod. The two ends of the upper spring are connected to the upper fixed plate and the upper annular plate, respectively, and the two ends of the lower spring are connected to the lower fixed plate and the lower annular plate, respectively. A tapping cleaning mechanism is provided inside the filter tank.

[0008] Preferably, the upper surface of the filter tank is provided with a feeding port, and a matching feeding cover is threadedly connected to the feeding port. The bottom of the outer surface of the filter tank is provided with a discharge port, and a matching discharge cover is threadedly connected to the discharge port.

[0009] Preferably, a positive drain valve is fixedly connected to the lower connecting pipe.

[0010] Preferably, a matching mesh screen is fixedly connected to the inner end face of the lower annular plate.

[0011] Preferably, the tapping cleaning mechanism includes tapping plates, rotating sleeves, and support rods. Two symmetrically distributed support rods are fixedly connected to both sides of the inner wall of the upper and lower ends of the filter tank. The outer surface of the support rods is fitted with rotating sleeves, and the outer surface of the rotating sleeves is fixedly connected with three evenly distributed tapping plates in a circular pattern.

[0012] Preferably, the upper tapping plate is located directly below the upper water inlet pipe, and the lower tapping plate is located directly above the lower connecting pipe.

[0013] Preferably, a rubber pad is fixedly connected to the bottom end of the support column.

[0014] Compared with related technologies, the anti-clogging multi-media filter for high-viscosity and high-turbidity wastewater provided by this utility model has the following beneficial effects: This invention incorporates a shaking screening mechanism and a tapping cleaning mechanism into a conventional filtration and backwashing valve system. The shaking screening mechanism utilizes mechanical vibration to effectively break up stubborn contaminant layers; the tapping cleaning mechanism uses water-driven tapping plates to pre-disperse contaminants during filtration and enhance turbulence during backwashing. This creates a multi-stage cleaning method combining hydraulic flushing with mechanical vibration and tapping. Compared to traditional filters, its backwashing is more thorough, effectively solving the clogging problem of high-viscosity, high-turbidity wastewater, and improving the operational stability of the equipment and the service life of the filter media. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the anti-clogging multi-media filter for high-viscosity, high-turbidity wastewater provided by this utility model; Figure 2 This is a cross-sectional view of the filter tank in this utility model.

[0016] The following are the labels in the diagram: 1. Filter tank; 2. Discharge cover; 3. Support column; 4. Feed cover; 5. Upper water inlet pipe; 6. Positive water inlet valve; 7. Back drain valve; 8. Backwash valve; 9. Positive drain valve; 10. Positive sewage valve; 11. Lower connecting pipe; 12. Upper fixing plate; 13. Annular plate; 14. Limiting plate; 15. Beating plate; 16. Rotating sleeve; 17. Support rod; 18. Spring; 19. Sliding rod; 20. Lower fixing plate; 21. Screen. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] Please see Figures 1 to 2 This utility model provides an anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater. The anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater includes: a filter tank 1, an upper inlet pipe 5, a lower connecting pipe 11, a support column 3, a shaking screening mechanism, and a tapping cleaning mechanism.

[0020] The upper surface of the filter tank 1 is provided with a feeding port, and a matching feeding cover 4 is threadedly connected to the feeding port. The bottom of the outer surface of the filter tank 1 is provided with a discharge port, and a matching discharge cover 2 is threadedly connected to the discharge port.

[0021] It should be noted that the setting of the feeding port and feeding cover 4, as well as the discharge port and discharge cover 2, provides convenience for the maintenance of the device. When it is necessary to replace or replenish the internal filter material, the user can easily fill, replace or clean the filter material inside the tank by opening the feeding cover 4 and the discharge cover 2, which reduces the difficulty and time cost of equipment maintenance.

[0022] The upper surface of the filter tank 1 is fixedly connected to an upper water inlet pipe 5, and two branch pipes are provided on the upper water inlet pipe 5. A positive water inlet valve 6 and a back drain valve 7 are respectively installed on the two branch pipes. The lower surface of the filter tank 1 is fixedly connected to a lower connecting pipe 11, and two branch pipes are provided on the lower connecting pipe 11. A backwash valve 8 and a positive drain valve 9 are respectively installed on the two branch pipes. A positive sewage discharge valve 10 is fixedly connected to the lower connecting pipe 11. Two symmetrically distributed support columns 3 are fixedly connected to the lower surface of the filter tank 1. A rubber pad is fixedly connected to the bottom end of the support column 3. The rubber pad can effectively absorb the small vibrations that may be generated during the operation of the equipment and protect the installation ground to reduce damage.

[0023] It should be noted that during the normal filtration process, the control system opens the positive inlet valve 6 and the positive outlet valve 9, while ensuring that the other valves are closed. High-viscosity and high-turbidity wastewater enters the filter tank 1 through the upper inlet pipe 5 and flows from top to bottom through the internal multi-media filter bed under the action of gravity. Under this working principle, suspended solids of different particle sizes in the wastewater are effectively intercepted by different levels of filter media. The purified water is discharged through the lower connecting pipe 11 and the opened positive outlet valve 9. The multi-stage filtration design helps to fully utilize the deep filtration efficiency of the multi-media filter bed, ensuring the quality of the effluent while also extending the single filtration cycle.

[0024] It should be noted that when the pressure difference increases due to excessive pollutant retention in the filter media layer, or when the preset filtration time is reached, the system switches to backwash mode. At this time, the control system closes the forward inlet valve 6 and the forward outlet valve 9, while simultaneously opening the backwash valve 8 and the back outlet valve 7. The backwash liquid enters the lower connecting pipe 11 through the backwash valve 8, forming a reverse impact water flow from bottom to top. This reverse water flow can effectively loosen and fluidize the compacted filter media layer, and peel off the viscous pollutants attached to the surface of the filter media. These pollutants are then discharged with the water flow through the upper inlet pipe 5 and the opened back outlet valve 7, thereby clearing the stubborn blockages caused by treating high-viscosity and high-turbidity wastewater and restoring the filtration performance of the filter bed.

[0025] It should be noted that after the backwashing process is completed, a brief forward wash process is usually performed. The control system opens the forward inlet valve 6 and the forward drain valve 10, introducing clean water that flows from top to bottom through the filter media layer that has just been washed. This washes away any small amount of impurities remaining after backwashing and recompacts and layers the loose filter media, while the wastewater carrying residual impurities is discharged through the forward drain valve 10. This avoids the problem of unstable effluent quality in the initial filtration stage that may occur if the normal filtration process is started immediately after backwashing, ensuring that the equipment can quickly return to a highly efficient and stable filtration state.

[0026] The filter tank 1 is equipped with a shaking screening mechanism, which includes an upper fixed plate 12, an annular plate 13, a limiting plate 14, a spring 18, a sliding rod 19, and a lower fixed plate 20. Two symmetrically distributed upper fixed plates 12 and lower fixed plates 20 are fixedly connected to the upper and lower ends of the inner wall of the filter tank 1, respectively. Sliding rods 19 are fixedly connected to the lower surface of the upper fixed plate 12 and the upper surface of the lower fixed plate 20. The two ends of the two annular plates 13 are respectively sleeved on the surfaces of the upper and lower sliding rods 19 and slidably connected to them. The outer ends of the sliding rods 19 are fixedly connected to the limiting plate 14, and the surfaces of the sliding rods 19 are all sleeved with springs 18. The two ends of the upper spring 18 are respectively connected to the upper fixed plate 12 and the upper annular plate 13, and the two ends of the lower spring 18 are respectively connected to the lower fixed plate 20 and the lower annular plate 13. A matching screen 21 is fixedly connected to the inner end face of the lower annular plate 13.

[0027] It should be noted that the shaking screening mechanism plays a role in preventing clogging during backwashing. When backwashing is performed, the backwash water flows from bottom to top, impacting the screen 21 and the entire filter bed. The kinetic energy of this water flow is not only used to disperse and fluidize the filter media, but also to drive the entire movable component consisting of the annular plate 13, the screen 21, and the filter media upward along the slide bar 19, thereby compressing the spring 18. When the impact force of the water flow, the elastic force of the spring 18, and the weight of the component itself reach a dynamic balance, the entire filter bed will generate high-frequency reciprocating oscillations in the vertical direction. This oscillation mode, which couples hydraulic and mechanical forces, can exert strong physical crushing and shearing action on the stubborn sludge cake formed by high-viscosity wastewater. Its cleaning efficiency is significantly improved compared to simple hydraulic backwashing. It can more thoroughly decompose pollutant clumps and prevent the formation of "mud balls", thereby greatly improving the backwashing effect and ensuring the rapid and full recovery of filtration performance.

[0028] The filter tank 1 is equipped with a tapping cleaning mechanism inside. The tapping cleaning mechanism includes tapping plates 15, rotating sleeves 16, and support rods 17. Two symmetrically distributed support rods 17 are fixedly connected to both sides of the inner wall of the upper and lower ends of the filter tank 1. The outer surface of the support rods 17 is fitted with rotating sleeves 16. Three evenly distributed and circumferentially distributed tapping plates 15 are fixedly connected to the outer surface of the rotating sleeves 16. The upper tapping plate 15 is located directly below the upper water inlet pipe 5, and the lower tapping plate 15 is located directly above the lower connecting pipe 11.

[0029] It should be noted that the upper tapping cleaning mechanism is located directly below the upper inlet pipe 5, while the lower tapping cleaning mechanism is located directly above the lower connecting pipe 11. During normal filtration, the viscous wastewater entering from the upper inlet pipe 5 directly impacts the upper tapping plate 15, driving it to rotate at high speed. This mechanical tapping and agitation can initially break down and disperse large suspended particles or clumps of pollutants in the wastewater, effectively slowing down the formation of a dense mud cake on the filter bed surface and promoting the uniformity of water distribution. During backwashing, the high-speed water flow entering from the lower connecting pipe 11 drives the lower tapping plate 15 to rotate, generating strong local turbulence at the bottom of the filter bed. This helps to quickly and evenly start up and fluidize the bottom support layer and filter media, thereby improving the start-up efficiency of backwashing. This also complements the oscillation function of the shaking screening mechanism, enhancing the cleaning effect.

[0030] In summary, this utility model provides an anti-clogging multi-media filter suitable for high-viscosity and high-turbidity wastewater, solving the problems of filter media caking, sticking, and incomplete backwashing that are common in traditional filters during the treatment of high-viscosity and high-turbidity wastewater.

[0031] Based on a conventional filtration and backwashing valve system, a shaking screening mechanism and a tapping cleaning mechanism are added. The shaking screening mechanism uses mechanical vibration to effectively break up stubborn contaminant layers; the tapping cleaning mechanism uses water-driven tapping plates to pre-disperse contaminants during filtration and enhance turbulence during backwashing. This forms a multi-stage cleaning method combining hydraulic flushing with mechanical vibration and tapping. Compared to traditional filters, its backwashing is more thorough, effectively solving the clogging problem of high-viscosity, high-turbidity wastewater, and improving the operational stability of the equipment and the service life of the filter media.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A clog-resistant multi-media filter suitable for high-viscosity, high-turbidity wastewater, characterized in that, include: Filter tank (1); The upper water inlet pipe (5) is fixedly connected to the upper surface of the filter tank (1), and two branch pipes are provided on the upper water inlet pipe (5), and a positive water inlet valve (6) and a reverse drain valve (7) are respectively installed on the two branch pipes. The lower connecting pipe (11) is fixedly connected to the lower surface of the filter tank (1), and two branch pipes are provided on the lower connecting pipe (11), and a backwash valve (8) and a positive drain valve (9) are respectively installed on the two branch pipes. Support columns (3): Two symmetrically distributed support columns (3) are fixedly connected to the lower surface of the filter tank (1). A shaking screening mechanism is provided inside the filter tank (1). The shaking screening mechanism includes an upper fixed plate (12), an annular plate (13), a limiting plate (14), a spring (18), a slide rod (19), and a lower fixed plate (20). Two symmetrically distributed upper fixed plates (12) and lower fixed plates (20) are fixedly connected to the upper and lower ends of the inner wall of the filter tank (1), respectively. The lower surface of the upper fixed plate (12) and the upper surface of the lower fixed plate (20) are both fixed. A sliding rod (19) is connected to the upper and lower sliding rods (19). The two ends of two annular plates (13) are respectively sleeved on the surface of the upper and lower sliding rods (19) and slidably connected to them. The outer end of the sliding rod (19) is fixedly connected to a limit plate (14), and the surface of the sliding rod (19) is covered with springs (18). The two ends of the upper spring (18) are respectively connected to the upper fixed plate (12) and the upper annular plate (13), and the two ends of the lower spring (18) are respectively connected to the lower fixed plate (20) and the lower annular plate (13). The filter tank (1) is equipped with a tapping cleaning mechanism.

2. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 1, characterized in that, The filter tank (1) has a feeding port on its upper surface, and a matching feeding cover (4) is threaded onto the feeding port. The filter tank (1) has a discharge port at the bottom of its outer surface, and a matching discharge cover (2) is threaded onto the discharge port.

3. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 1, characterized in that, A positive drain valve (10) is fixedly connected to the lower connecting pipe (11).

4. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 1, characterized in that, A matching mesh screen (21) is fixedly connected to the inner end face of the annular plate (13) located below.

5. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 1, characterized in that, The tapping cleaning mechanism includes tapping plates (15), rotating sleeves (16) and support rods (17). Two symmetrically distributed support rods (17) are fixedly connected to both sides of the inner wall of the upper and lower ends of the filter tank (1). The outer surface of the support rods (17) is fitted with rotating sleeves (16), and the outer surface of the rotating sleeves (16) is fixedly connected with three evenly distributed tapping plates (15) in a circular pattern.

6. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 5, characterized in that, The upper tapping plate (15) is located directly below the upper water inlet pipe (5), and the lower tapping plate (15) is located directly above the lower connecting pipe (11).

7. The anti-clogging multi-media filter suitable for high-viscosity, high-turbidity wastewater according to claim 1, characterized in that, A rubber pad is fixedly connected to the bottom end of the support column (3).

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