Treatment device and method for urban domestic sewage

Abstract

The invention relates to the technical field of sewage treatment, in particular to a treatment device and method for urban domestic sewage, and aims to solve the problems that undegradable garbage containing impurities in the urban sewage is easy to block and interfere water treatment equipment, and normal operation is influenced. Comprising a water treatment pond, a water collection pipe and a discharge pipe, the water collection pipe is located above the water treatment pond, the discharge pipe is far away from the water collection pipe and communicates with the water treatment pond, the water treatment pond is provided with a filter part and an anti-blocking assembly in the length direction, and the filter part is close to the water collection pipe; the anti-blocking assembly does linear motion along the water treatment pond, and the anti-blocking assembly can intermittently clean the filter piece in the linear motion. After entering the water treatment tank, the sewage is filtered by the filter part and cleaned by the anti-blocking assembly, so that the volume of sundries and garbage is further reduced, and the blocking risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a device and method for treating urban domestic sewage. Background Art

[0002] Municipal domestic sewage primarily originates from households, commercial buildings, and catering services. Typical components include grease, organic matter, inorganic matter, and various solid impurities carried by kitchen wastewater, feces, and domestic water. With the acceleration of urbanization, domestic sewage discharge continues to grow. Simultaneously, the diversification of lifestyles has led to the contamination of sewage with a large amount of non-degradable foreign matter, such as wet wipes, plastic film, food packaging, hair, and fabric debris. These highly adhesive or easily entangled solids often become lodged on pipes, grates, and subsequent treatment units, leading to pipe blockages and frequent equipment downtime for maintenance, seriously impacting the safe operation of sewage treatment plants and the quality of the effluent.

[0003] Currently, most urban sewage pipe networks and pretreatment facilities (such as screens and grit chambers) rely primarily on manual or mechanical clearing to intercept large debris. However, wet wipes tend to swell and clump when exposed to water, hair and fiber debris can easily become entangled in screen bars or screw conveyors, and plastic film tends to adhere to the screen surface, making cleaning more difficult. Traditional coarse screens, while capable of intercepting larger objects, are less efficient at removing small and medium-sized debris, such as wet wipes, plastic film, and hair. Fine screens or microscreens, while capable of intercepting even smaller impurities, are prone to self-clogging, require frequent flushing and cleaning, consume significant energy, and incur high maintenance costs.

[0004] To reduce clogging, the industry has experimented with installing rotating brushes, vibrating screens, or ultrasonic cleaning devices in front of the screen to remove or disperse entangled debris. However, rotating brushes are limited in their effectiveness at removing flexible materials (such as wet wipes), and vibrating screens are prone to resonance under high loads, causing mesh deformation. They also generate significant noise and energy consumption. While ultrasonic technology can avoid mechanical friction, its handling capacity for large debris is limited, and the equipment and maintenance costs are high, making it unsuitable for adoption in small and medium-sized wastewater treatment plants. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the non-degradable garbage contained in urban sewage can easily cause blockage and interference to water treatment equipment, affecting normal operation. The purpose is to provide a treatment device and method for urban domestic sewage, which can perform pre-treatment on urban domestic sewage after discharge, reduce most of the non-degradable and easily blocked foreign matter, and avoid clogging the equipment and affecting its use.

[0006] The first technical aspect of the present invention is achieved through the following technical solutions: A device for treating urban domestic sewage, comprising a water treatment tank, a water collection pipe, and a discharge pipe, wherein the water collection pipe is located above the water treatment tank, the discharge pipe is arranged away from the water collection pipe and is connected to the water treatment tank, and the water treatment tank is provided with a filter element and an anti-blocking component along the length direction, wherein the filter element is arranged near the water collection pipe; The anti-blocking component moves linearly along the water treatment tank, and the anti-blocking component can intermittently clear the filter element during the linear movement.

[0007] In the above technical solution, the anti-blocking component moves back and forth in a straight line to achieve intermittent mechanical clearing of the filter element, reduce the frequency of manual cleaning, ensure the long-term stable operation of the filter element and maintain unobstructed discharge, and avoid blockage of subsequent water treatment equipment.

[0008] Preferably, the filter element is provided with a plurality of filter holes along the thickness direction.

[0009] In the above technical solution, a porous structure is arranged in the thickness direction of the filter element to achieve graded or multi-channel flow, which not only ensures the filtration flux, but also reduces the impact of single-hole clogging, thereby improving the overall filtration efficiency and stability.

[0010] Preferably, the anti-blocking component includes a limiting shell, a movable plate and several clearing rods, the movable plate is located in the limiting shell, the limiting shell is penetrated by a through hole along the thickness direction, the movable plate and the clearing rod are fixedly connected, the clearing rods pass through the through hole and are located on both sides of the limiting shell, both ends of the clearing rods are rotatably connected to a crushing head, and the crushing head can pass through the filter hole.

[0011] In the above technical solution, the movable plate drives the clearing rod and the crushing head to penetrate the filter hole to mechanically crush and remove the blockage, which can handle obstructive, fibrous and agglomerated blockages.

[0012] Preferably, a driving member is provided on the water treatment pool, a partition is provided on the side of the top of the limiting shell facing the driving member, the movable plate is located on one side of the partition, the length of the partition is less than half the length of the limiting shell, and the top surface of the limiting shell forms an overflow trough with the water treatment pool on the side opposite to the partition.

[0013] In the above technical solution, the clearing stroke is controlled and overshoot is avoided by the relative positioning of the driving member and the partition; the overflow trough provides an overflow channel when the liquid level in the water treatment tank is high.

[0014] Preferably, the end of the crushing head is provided with a plurality of cleaning teeth, the radius of the circle formed by the plurality of cleaning teeth is smaller than the radius of the crushing head, and the outer surface of the crushing head is provided with cutting teeth, the height of the cutting teeth is smaller than the height of the slider.

[0015] In the above technical solution, cleaning teeth are provided at the end of the crushing head for grabbing and peeling off blockages, and cutting teeth on the outer surface are used to cut fibers or long strips of debris, ensuring sufficient mechanical cleaning capacity while avoiding interference or damage with the sliding parts, thereby improving reliability and life.

[0016] Preferably, it further comprises a filter residue piece arranged in the water treatment tank, the filter residue piece is located on a side of the anti-blocking component away from the filter piece, and a plurality of filter holes are also formed on the filter residue piece.

[0017] In the above technical solution, a second component is set after the filter element to collect fine solids or crushed solids that still need to be discharged after being processed by the anti-blocking component, forming a multi-stage filtration and separation path, which is convenient for reducing the cumulative load on subsequent water treatment equipment.

[0018] Preferably, a sleeve is rotatably connected in the filter hole, a spiral groove is provided in the sleeve, a guide groove is provided in the filter hole, transition grooves are provided at both ends of the guide groove in the length direction, a slider is slidably connected in the guide groove, the slider is also slidably connected to the spiral groove and the end is located in the filter hole, an elastic pad is provided in the transition groove, and an annular boss is provided on the outer surface of the crushing head.

[0019] In the above technical solution, the sleeve cooperates with the annular boss and the slider, so that the sleeve can rotate and the cleaning teeth and cutting teeth of the crushing head can be used to clear blockages.

[0020] Preferably, a groove is formed on one side of the filter residue piece close to the limit shell, and a protrusion that cooperates with the groove is formed on the side of the limit shell facing the filter residue piece. A guide rail is provided on the water treatment tank between the filter residue piece and the filter element, and a slide groove that is slidably connected to the guide rail is provided at the bottom of the limit shell.

[0021] In the above technical solution, the groove and the protrusion cooperate to generate local attraction after the limiting shell and the filter residue element come into contact and separate, thereby taking away the debris and improving the cleaning power.

[0022] Preferably, a collecting tank is further provided on one side of the length direction of the water treatment tank, a collecting piece is provided on the top of the water treatment tank, the collecting piece is rotatably connected to a rotating arm, a collecting hopper is provided at the end of the rotating arm, and the rotating path of the collecting hopper passes through the side of the filter element.

[0023] In the above technical solution, a rotating collection element is set up to collect and transfer large garbage along the side of the filter element, so that the large garbage is removed from the filter surface in time and concentrated in the collection pool to avoid backflow of large garbage or blocking the filter surface.

[0024] Preferably, the top surfaces of the filter element and the filter residue element are higher than the maximum liquid level in the water treatment tank, the top surface of the limiting shell is lower than the liquid level in the water treatment tank, and the height of the partition is higher than the height of the filter element and the filter residue element.

[0025] In the above technical solution, the top surface of the limit shell is lower than the liquid level, ensuring that certain clearing components or moving parts operate in a liquid environment so as to penetrate the filter holes; the partition height is higher than the filter element to form an appropriate liquid level / isolation, and the overflow tank and other designs are combined to control the liquid flow path and clearing conditions, thereby taking into account both the interception efficiency and the effectiveness of clearing.

[0026] The second technical aspect of the present invention provides a method for treating urban domestic sewage, which is based on the urban domestic sewage treatment device described in the first technical aspect of the present invention to achieve sewage treatment, including: S1. Collection and discharge of sewage: collect urban domestic sewage, treat it centrally and then discharge it to the water treatment pool through the collection pipe; S2, filtering and collecting slag; S3, performing blockage clearing and crushing based on the process of filtering and collecting slag; S4. Wastewater discharge.

[0027] In the above technical solution, the clearing and crushing steps are performed synchronously or periodically during the filtration process to ensure that the filtration process is uninterrupted or less interrupted, realize continuous or semi-continuous processing, improve processing efficiency and reduce manual intervention.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. In the present invention, urban domestic sewage is discharged into a water treatment pool and passes through filter elements and filter residue elements respectively, thereby reducing the content of impurities in the sewage and avoiding clogging of subsequent water treatment equipment; 2. The limiting shell in the present invention can move back and forth toward the filter element and the filter residue element respectively under the control of the movable plate. During the movement, the crushing head penetrates the filter holes, which can crush and separate the garbage remaining and blocked in the filter holes, reduce the volume, and pass through the filter holes, further reducing the risk of clogging of subsequent water treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 This is a schematic structural diagram of the present invention when the limiting housing is located in the middle of the water treatment tank; Figure 2 for Figure 1 A partial enlarged view of point A in the middle; Figure 3 This is a schematic structural diagram of the present invention when the limiting housing and the filter element are fitted together; Figure 4 for Figure 3 A partial enlarged view of point B in the middle; Figure 5 This is a schematic structural diagram of the present invention when the limiting housing and the filter element are fitted together; Figure 6 for Figure 5 A partial enlarged view of point C in the middle; Figure 7 is a cross-sectional view of the water treatment tank of the present invention; Figure 8 This is a schematic diagram of the structure of the crushing head when passing through the filter hole in the present invention; Figure 9 for Figure 8 A partial enlarged view of point D in the middle; Figure 10 It is a structural schematic diagram of the water treatment pool in the present invention; Figure 11 1 is an exploded view of the limiting housing and the movable plate in the present invention; Figure 12 This is an exploded view of the clearing rod, crushing head and sleeve in the present invention.

[0030] The reference numerals represent: 1. Water treatment tank; 11. Water collecting pipe; 12. Discharge pipe; 13. Guide rail; 2. Filter element; 21. Filter hole; 22. Guide groove; 23. Transition groove; 24. Slider; 3. Filter residue element; 31. Groove; 4. Limiting shell; 41. Partition; 42. Bump; 5. Moving plate; 51. Clearing rod; 6. Crushing head; 61. Annular boss; 62. Cleaning teeth; 63. Cutting teeth; 7. Sleeve; 8. Collection tank; 81. Collection element; 82. Aggregate hopper. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the examples and accompanying drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0032] Example 1 like Figures 1 to 7 As shown, this embodiment provides a treatment device for urban domestic sewage, including a water treatment tank 1, a water collection pipe 11 and a discharge pipe 12. The water collection pipe 11 is located above the water treatment tank 1, and the discharge pipe 12 is arranged away from the water collection pipe 11 and connected to the water treatment tank 1. The water treatment tank 1 is characterized in that a filter element 2 and an anti-blocking component are respectively provided along the length direction, and the filter element 2 is arranged close to the water collection pipe 11. The anti-blocking component moves linearly along the water treatment tank 1 , and can intermittently clear the filter element 2 during the linear movement.

[0033] like Figures 1 to 6 、 Figure 10 As shown, the filter element 2 is provided with a plurality of filter holes 21 along the thickness direction.

[0034] like Figures 1 to 6 、 Figure 11 As shown, the anti-blocking component includes a limiting shell 4, a movable plate 5 and several clearing rods 51. The movable plate 5 is located in the limiting shell 4. The limiting shell 4 has a through hole passing through it along the thickness direction. The movable plate 5 and the clearing rod 51 are fixedly connected. The clearing rod 51 passes through the through hole and is located on both sides of the limiting shell 4. Both ends of the clearing rod 51 are rotatably connected to a crushing head 6, and the crushing head 6 can pass through the filter hole 21.

[0035] like Figures 1 to 7 、 Figure 11 As shown, a driving member is provided on the water treatment pool 1, and a partition 41 is provided on the side of the top of the limiting shell 4 facing the driving member. The movable plate 5 is located on one side of the partition 41. The length of the partition 41 is less than half the length of the limiting shell 4. The top surface of the limiting shell 4 forms an overflow trough with the water treatment pool 1 on the side opposite to the partition 41.

[0036] like Figures 1 to 7 As shown, it also includes a filter residue piece 3 arranged in the water treatment tank 1. The filter residue piece 3 is located on the side of the anti-blocking component away from the filter element 2. A plurality of filter holes 21 are also opened on the filter residue piece 3.

[0037] like Figures 1 to 7 As shown, the top surfaces of the filter element 2 and the filter residue element 3 are higher than the maximum liquid level in the water treatment tank 1, the top surface of the limit shell 4 is lower than the liquid level in the water treatment tank 1, and the height of the partition 41 is higher than the height of the filter element 2 and the filter residue element 3.

[0038] like Figures 1 to 7 、 Figure 10 As shown, a groove 31 is formed on one side of the filter residue member 3 close to the limiting shell 4, and a protrusion 42 that cooperates with the groove 31 is formed on the side of the limiting shell 4 facing the filter residue member 3. A guide rail 13 is provided on the water treatment tank 1 between the filter residue member 3 and the filter member 2, and a sliding groove that is slidably connected to the guide rail 13 is provided at the bottom of the limiting shell 4.

[0039] Specifically, before discharging urban domestic sewage to the water treatment equipment, it is first pretreated to reduce the non-degradable and easily clogged substances in the sewage, such as wet wipes, plastic films, food packaging bags, hair, fiber fabric debris, etc.; the centralized sewage treatment is discharged to the water treatment tank 1 through the water collection pipe 11, and the water entering the water treatment tank 1 passes through the filter element 2, the anti-clogging component, and the filter residue element 3, and is discharged through the discharge pipe 12. A valve should be provided at the discharge pipe 12 to open and close the discharge pipe 12; when the sewage is discharged along the water collection pipe 11 for the first time, the discharge pipe 12 can be closed. When the water level in the water treatment tank 1 is constant at the height of the filter element 2, the discharge pipe 12 can be slowly opened, so that the water level in the water treatment tank 1 is always maintained at the height of the filter element 2, and the lowest height is not lower than the height of the top of the limit shell 4.

[0040] A water storage space is formed between the filter element 2 and the filter residue element 3, and the total length of the water storage space is greater than the rod length of the clearing rod 51; when the sewage passes through the filter element 2, the water and small impurities enter the water storage space through the filter holes 21, and enter the discharge pipe 12 along the top of the limiting shell 4 through the filter residue element 3, while large impurities are blocked by the filter element 2 and cannot pass through, thereby avoiding subsequent blockage of the pool treatment equipment.

[0041] Specifically, a receiving groove is formed in the limiting shell 4, and the slide groove at the bottom of the limiting shell 4 can slide along the guide rail 13 on the water treatment tank 1 to change the distance between the limiting shell 4 and the filter element 2 and the filter residue element 3. The top of the limiting shell 4 is connected to a partition 41, and the partition 41 is U-shaped or rectangular. The maximum length of the partition 41 should be half the length of the limiting shell 4 to provide flow space for sewage. The movable plate 5 is located in the receiving groove of the limiting shell 4, and the top of the movable plate 5 extends to the partition 41. A driving member is provided on the water treatment tank 1, and the output of the driving member The end is connected to the top of the movable plate 5. Preferably, the driving member can be a linear motion mechanism such as a cylinder, a hydraulic cylinder or a screw; the two side surfaces of the movable plate 5 in the limit shell 4 are fixedly connected with the clearing rods 51, and correspondingly, the two side surfaces of the limit shell 4 are provided with through holes for the clearing rods 51 to pass through one by one, and the filter holes 21 on the filter element 2 and the filter residue element 3 also correspond to the clearing rods 51, so that the clearing rods 51 can pass through to achieve clearing. Preferably, the filter holes 21 on the filter residue element 3 can be smaller than the filter holes 21 on the filter element 2, so as to further improve the filtering and clearing effect.

[0042] Regarding the sewage clearing method of this embodiment: when the sewage discharged from the water collecting pipe 11 continues to flow along the water treatment tank 1, the sewage enters the water storage space along the filter holes 21 of the filter element 2, and the filter element 2 filters out large impurities and leaves them in the front. The sewage between the filter element 2 and the limiting shell 4 flows to the filter residue element 3 through the top of the limiting shell 4. The top surface of the limiting shell 4 is lower than the filter element 2, and there is a flow space for sewage to pass between the partition 41 and the water treatment tank 1, which can smoothly allow the sewage to flow to the filter residue element 3, and the filter residue element 3 performs secondary filtration again to discharge the sewage to the discharge pipe 12.

[0043] During the flow of sewage, the movable plate 5 can be driven by the driving member to move, and then the limit housing 4 can be driven to move. For example, when the movable plate 5 is controlled to move toward the filter element 2, the movable plate 5 first moves in the partition 41 until the contact with the partition 41 is limited, and then the limit housing 4 is driven to move. The limit housing 4 will eventually contact the fixed filter element 2, and at this time, the blocking rod 51 has passed through the filter hole 21 on the filter element 2, and the hair and other easily blocked substances contained in the sewage will be cleared to avoid affecting the water output of the filter hole 21; on the contrary, when the limit housing 4 leaves the filter element 2 and moves toward the filter residue element 3, the movable plate 5 moves in the same way, which will not be repeated here. The filter residue element 3 moves toward A groove 31 is provided on one side of the limit shell 4, and a protrusion 42 that engages with the groove 31 is formed on the side of the limit shell 4 facing the filter element 3. When the limit shell 4 cooperates with the filter element 3, the protrusion 42 presses the groove 31, and the clearing rod 51 penetrates and blocks the filter hole 21, thereby temporarily isolating the flow of sewage at the filter element 3. When the limit shell 4 leaves the filter element 3 and moves toward the filter element 2 again, the protrusion 42 and the clearing rod 51 leave the filter element 3, and the sewage continues to pass through. At this time, attraction is generated at the filter element 3, which can not only take away impurities on the filter hole 21 of the filter element 3, but also take out impurities floating in the water storage space, thereby enhancing the sewage treatment effect.

[0044] Example 2 This embodiment is based on the further cleaning and anti-blocking of the filter element 2 and the filter residue element 3 in embodiment 1.

[0045] like Figures 1 to 9 、 Figure 12 As shown, a plurality of cleaning teeth 62 are provided at the end of the crushing head 6 , and the circumferential radius formed by the plurality of cleaning teeth 62 is smaller than the radius of the crushing head 6 . A cutting tooth 63 is provided on the outer surface of the crushing head 6 , and the height of the cutting tooth 63 is smaller than the height of the slider 24 .

[0046] like Figures 1 to 9 、 Figure 12As shown, a sleeve 7 is rotatably connected in the filter hole 21, a spiral groove is provided in the sleeve 7, a guide groove 22 is provided in the filter hole 21, and transition grooves 23 are provided at both ends of the guide groove 22 in the length direction. A slider 24 is slidably connected in the guide groove 22, and the slider 24 is also slidably connected to the spiral groove and the end portion is located in the filter hole 21. An elastic pad is provided in the transition groove 23, and an annular boss 61 is provided on the outer surface of the crushing head 6.

[0047] Specifically, the end of the clearing rod 51 is rotatably connected to the crushing head 6, and the crushing head 6 can pass through the filter hole 21. The outer peripheral surface of the crushing head 6 is connected to the sleeve 7, which is rotatably connected to the filter hole 21. The sleeve 7 is provided with a spiral groove. Correspondingly, a guide groove 22 is provided in the filter hole 21. The guide groove 22 is a linear structure, and transition grooves 23 are provided at both ends of the guide groove 22 in the length direction. An elastic pad is provided in the transition groove 23. When the annular boss 61 drives the slider 24 to move to the elastic pad close to the water collecting pipe 11, the slider 24 can be slidably connected to the guide groove 22 and The slider 24 in the spiral groove is pressed down toward the elastic pad, the elastic pad contracts, the slider moves down, and the annular boss 61 passes through the slider as a whole, thereby causing the crushing head to extend out of the filter hole. When returning, the slider 24 is located on the side of the annular boss 61 close to the limit shell 4, and the annular boss 61 drives the slider to move from the transition groove to the guide groove 22. Preferably, the connection between the transition groove and the guide groove 22 should be provided with an arc-shaped transition section to facilitate the movement and transition of the slider 24. During the return process of the annular boss 61, it will drive the slider 24 to move, and drive the sleeve 7 to rotate again until the crushing head 6 leaves and the slider 24 returns to its original position.

[0048] As in the moving mode of Example 1, when the clearing rod 51 controls the crushing head 6 to enter the filter hole 21, the annular boss 61 pushes the slider 24 in the filter hole 21 to slide along the guide groove 22. During the movement of the slider 24, it will contact the side wall of the spiral groove and produce a guiding effect, thereby driving the sleeve 7 to rotate until the crushing head 6 extends out of the moving plate 5 and stops moving; during the linear movement of the crushing head 6 and the rotational movement of the sleeve 7, if there are hair, film, fiber and other debris in the sleeve 7, that is, in the filter hole 21, the rotating sleeve 7 will rotate and chop these debris on the cutting teeth 63 of the crushing head 6 into smaller impurities, avoiding clogging in the filter hole 21, and also facilitating the subsequent water treatment equipment to treat sewage and avoid clogging by these impurities.

[0049] In addition, the sewage may also contain large flexible debris such as wet wipes and cloth. Because these debris are flexible and are in the sewage, the tension of the sewage will cause these debris to stick to the filter element 2, making it unable to enter the water storage space, thereby causing large-scale blockage and affecting the normal operation of the water treatment tank 1; and when the crushing head 6 exposes the filter element 2 through the filter hole 21, it will push up the large debris at the filter hole 21. The movement of multiple crushing heads 6 is simultaneous, which can effectively separate the large debris from the filter element 2. At the same time, the cleaning teeth 62 at the front end of the crushing head 6 are relatively sharp, which can to a certain extent chop or scratch the large debris mentioned above, reducing the area of ​​the large debris. In multiple cycles of the limit shell 4, the large debris at the front end of the filter element 2 can be effectively chopped by the crushing head 6 to avoid clogging.

[0050] When cleaning the filter element 3, the same as the above content, when the limiting shell 4 leaves, a large amount of cut debris is sucked away by the suction force at the filter element 3, including debris in the water storage space and the filter hole 21 of the filter element 3; it should be noted that the length in the water storage space should meet the reciprocating motion of the limiting shell 4, and when the limiting shell 4 is centered, the clearing rods 51 on both sides neither contact the filter element 2 nor the filter element 3. In several reciprocating cycles, the small impurities crushed in the water storage space can be fluidically disturbed by several arranged crushing heads 6 with the help of sewage, thereby reducing the deposition of small impurities in the water storage space, and can move to the filter element 3 with the disturbed water flow and be discharged, and when the limiting shell 4 contacts the filter element 2 and the filter element 3, the crushed debris can also be squeezed, so that a cycle of squeezing and crushing is realized in the water storage space until it enters the filter element 3 for discharge, thereby achieving further crushing and clearing, reducing the volume and preventing blockage.

[0051] Example 3 like Figures 1 to 6 As shown, a collecting tank 8 is also provided on one side of the length direction of the water treatment tank 1, and a collecting member 81 is provided on the top of the water treatment tank 1. The collecting member 81 is rotatably connected to a rotating arm, and a collecting hopper 82 is provided at the end of the rotating arm. The rotating path of the collecting hopper 82 passes through the side of the filter element 2.

[0052] Specifically, the collecting element 81 is connected to a motor, which can control the rotating arm to move back and forth along the collecting tank 8 and the water treatment tank 1. When there are large debris as mentioned in Example 2 at the front end of the filter element 2, the collecting hopper 82 can catch these large debris, as well as other debris that can be caught and chopped debris into the collecting tank 8.

[0053] It should be noted that the present invention is used for pre-treatment of sewage treatment, the purpose of which is to reduce the debris in urban domestic sewage and avoid clogging of water treatment equipment during later sewage treatment; part of the debris retained at the front end of the filter element 2 is taken away by the collecting hopper 82 and enters the collection tank 8, and part of it is broken into smaller and less clogging debris after multiple cycles of the limiting shell 4, and is finally discharged into the discharge pipe 12, and some of it will remain at the front end of the filter element 2.

[0054] When the urban domestic sewage treatment device of the present invention is working, the water collecting pipe 11 will continuously discharge sewage into the water treatment tank 1. Therefore, the water in the water treatment tank 1 is flowing, so the debris in the water treatment tank 1 in front of the filter element 2 will roll continuously in the water under the drainage effect of the water collecting pipe 11. When the debris approaches the filter element 2, the debris that is not easy to clog passes through the filter hole 21; some of the debris that is easy to clog remains in the filter hole 21 and is crushed and cut by the crushing head 6, and part of it is caught by the collecting hopper 82 and enters the collection tank 8, thereby reducing the risk of clogging.

[0055] Preferably, the collecting hopper 82 in the present invention is not only a bucket-shaped structure, but can also be a plate-shaped, block-shaped, or even a brush-like structure, and the effect is always to brush away the debris attached to the filter element 2.

[0056] Example 4 A method for treating urban domestic sewage, based on an urban domestic sewage treatment device provided in Examples 1 to 3, to achieve sewage treatment, comprising: S1, sewage collection and discharge: collect urban domestic sewage and treat it centrally, then discharge it to water treatment pool 1 through water collection pipe 11; S2, filtering and collecting slag; S21, domestic sewage flows through filter element 2, small impurities pass through filter pores 21, and large impurities remain in filter element 2; S22, small impurities are discharged through the filter element 3 after passing through the anti-blocking component; S23, the collecting element 81 collects the large garbage outside the filter element 2 into the collecting pool 8 during the movement; S3, performing blockage clearing and crushing based on the process of filtering and collecting slag; S31, the movable plate 5 drives the limiting housing 4 to move toward the filter element 2, and the crushing head 6 penetrates the filter hole 21 of the filter element 2; S32, the movable plate 5 drives the limiting housing 4 to move toward the filter element 3, and the crushing head 6 penetrates the filter hole 21 of the filter element 3; S33, repeat S31 and S32; S4. Wastewater discharge.

[0057] Specifically, after the urban domestic sewage is discharged into the water treatment tank 1 through the water collection pipe 11, the sewage passes through the filter element 2, the limiting shell 4, and the filter residue element 3, and is filtered step by step, and is finally discharged from the discharge pipe 12, and is treated by the water treatment equipment of the next process; during the filtration in the water treatment tank 1, the limiting shell 4 can realize reciprocating motion. When it contacts the filter element 2 or the filter residue element 3, the crushing head 6 passes through the corresponding filter hole 21, takes away or crushes and separates the garbage in the filter hole 21, reduces the volume, and reduces the risk of subsequent clogging of the water treatment tank 1.

[0058] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A treatment device for urban domestic sewage, comprising a water treatment tank (1), a water collecting pipe (11) and a discharge pipe (12), wherein the water collecting pipe (11) is located above the water treatment tank (1), and the discharge pipe (12) is arranged away from the water collecting pipe (11) and communicated with the water treatment tank (1), characterized in that: The water treatment pool (1) is provided with a filter element (2) and an anti-blocking component along the length direction, and the filter element (2) is provided close to the water collecting pipe (11); The anti-blocking component moves linearly along the water treatment tank (1), and the anti-blocking component can intermittently clear the filter element (2) during the linear movement.

2. The device for treating urban domestic sewage according to claim 1, characterized in that: The filter element (2) is provided with a plurality of filter holes (21) along the thickness direction.

3. The device for treating urban domestic sewage according to claim 2, characterized in that: The anti-blocking assembly comprises a limiting shell (4), a movable plate (5) and a plurality of clearing rods (51), wherein the movable plate (5) is located in the limiting shell (4), the limiting shell (4) is penetrated by a through hole along the thickness direction, the movable plate (5) and the clearing rods (51) are fixedly connected, the clearing rods (51) penetrate the through hole and are located on both sides of the limiting shell (4), and both ends of the clearing rods (51) are rotatably connected to a crushing head (6), and the crushing head (6) can pass through the filter hole (21).

4. The device for treating urban domestic sewage according to claim 3, characterized in that: The water treatment pool (1) is provided with a driving member, a partition (41) is provided on the side of the top end of the limiting shell (4) facing the driving member, the movable plate (5) is located on one side of the partition (41), the length of the partition (41) is less than half the length of the limiting shell (4), and the side of the top surface of the limiting shell (4) facing the partition (41) forms an overflow trough with the water treatment pool (1).

5. The device for treating urban domestic sewage according to claim 3, characterized in that: The end of the crushing head (6) is provided with a plurality of cleaning teeth (62), the circumferential radius formed by the plurality of cleaning teeth (62) is smaller than the radius of the crushing head (6), and the outer surface of the crushing head (6) is provided with cutting teeth (63), the height of the cutting teeth (63) is smaller than the height of the slider (24).

6. The device for treating urban domestic sewage according to claim 4, characterized in that: It also includes a filter residue piece (3) arranged in the water treatment pool (1), the filter residue piece (3) is located on a side of the anti-blocking component away from the filter element (2), and a plurality of filter holes (21) are also formed on the filter residue piece (3).

7. The device for treating urban domestic sewage according to claim 6, characterized in that: A sleeve (7) is rotatably connected in the filter hole (21), a spiral groove is provided in the sleeve (7), a guide groove (22) is provided in the filter hole (21), transition grooves (23) are provided at both ends of the guide groove (22) in the length direction, a slider (24) is slidably connected in the guide groove (22), the slider (24) is also slidably connected to the spiral groove and the end portion is located in the filter hole (21), an elastic pad is provided in the transition groove (23), and an annular boss (61) is provided on the outer surface of the crushing head (6).

8. The device for treating urban domestic sewage according to claim 6, characterized in that: A groove (31) is formed on one side of the filter residue member (3) close to the limiting shell (4), and a protrusion (42) that cooperates with the groove (31) is formed on one side of the limiting shell (4) facing the filter residue member (3). A guide rail (13) is provided on the water treatment tank (1) between the filter residue member (3) and the filter member (2), and a sliding groove that is slidably connected to the guide rail (13) is provided at the bottom of the limiting shell (4).

9. The device for treating urban domestic sewage according to claim 6, characterized in that: A collecting tank (8) is further provided on one side of the water treatment tank (1) in the longitudinal direction. A collecting member (81) is provided on the top of the water treatment tank (1). The collecting member (81) is rotatably connected to a rotating arm. A collecting hopper (82) is provided at the end of the rotating arm. The rotating path of the collecting hopper (82) passes through the side of the filter element (2).

10. The device for treating urban domestic sewage according to claim 6, characterized in that: The top surfaces of the filter element (2) and the filter residue element (3) are higher than the maximum liquid level in the water treatment tank (1), the top surface of the limit shell (4) is lower than the liquid level in the water treatment tank (1), and the height of the partition (41) is higher than the height of the filter element (2) and the filter residue element (3).

11. A method for treating urban domestic sewage, which is based on the urban domestic sewage treatment device according to claim 9 to achieve sewage treatment, characterized in that: include: S1, collect sewage; Collecting urban domestic sewage and then treating it centrally before discharging it to the water treatment pool (1) through the water collection pipe (11); S2, filtering and collecting slag; S3, performing blockage clearing and crushing based on the process of filtering and collecting slag; S4. Wastewater discharge.

12. A method for treating urban domestic sewage according to claim 11, characterized in that: The S2 includes: S21, domestic sewage flows through the filter element (2), small impurities pass through the filter holes (21), and large impurities remain in the filter element (2); S22, small impurities are discharged through the filter element (3) after passing through the anti-blocking component; S23, the collecting element (81) collects the large garbage outside the filter element (2) into the collecting pool (8) during the movement; The S3 includes: S31, the movable plate (5) drives the limiting housing (4) to move toward the filter element (2), and the crushing head (6) penetrates the filter hole (21) of the filter element (2); S32, the movable plate (5) drives the limiting housing (4) to move toward the filter residue piece (3), and the crushing head (6) penetrates the filter hole (21) of the filter residue piece (3); S33. Repeat S31 and S32.

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