A device and method for treating municipal domestic sewage

Abstract

The present application relates to sewage treatment technical field, especially to a kind of for urban domestic sewage treatment device and method, to solve the problem that the garbage of no degradable contained in urban sewage is easy to cause the blockage interference of water treatment equipment, affect normal operation. Including water treatment pool, water collecting pipe and discharge pipe, water collecting pipe is located above water treatment pool, discharge pipe is set away from water collecting pipe and is communicated with water treatment pool, water treatment pool is respectively provided with filter and anti-blocking component along length direction, filter is set close to water collecting pipe;Anti-blocking component makes linear motion along water treatment pool, and anti-blocking component can intermittently clean filter in linear motion. After sewage enters water treatment pool, filter and cleaning of anti-blocking component, further reduce the volume of sundry garbage, reduce the risk of blockage.

Description

TECHNICAL FIELD

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

[0002] Urban domestic sewage mainly comes from residential households, commercial buildings and catering services, and typical components include oil, organic matter, inorganic matter and various solid impurities carried by kitchen wastewater, excrement and domestic water. With the acceleration of urbanization, the discharge of domestic sewage continues to grow, and the diversification of lifestyle has mixed a large amount of non-degradable foreign matter into the sewage, such as wet paper towels, plastic films, food packaging bags, hair, and fiber fabric debris. These high-adhesion or easily-winding solid substances often remain on the surface of the pipeline, grid and subsequent treatment units, causing pipeline blockage and frequent equipment shutdown for maintenance, which seriously affects the safe operation of the sewage treatment plant and the effluent quality.

[0003] Currently, most urban sewage networks and pretreatment facilities (such as grids and grit chambers) mainly rely on manual or mechanical cleaning to intercept large-particle impurities. However, wet paper towels tend to swell into clumps when they come into contact with water, hair and fiber impurities tend to wind around the screen bars or screw conveyors, and plastic film substances tend to adhere to the surface of the grid, making it difficult to clean. Although traditional coarse grids can intercept larger objects, they have low removal efficiency for wet paper towels, plastic films and hair. Fine grids or micro-sieve devices can intercept smaller impurities, but they are prone to blockage, have high cleaning frequency, high energy consumption and high maintenance costs.

[0004] In order to reduce the blockage phenomenon, the industry has attempted to install rotating brushes, vibrating screens or ultrasonic cleaning devices before the grid to strip or disperse the winding objects. However, rotating brushes have limited stripping effect on flexible materials such as wet paper towels, vibrating screens are prone to resonance and deformation of the screen holes under high load, and have high noise and energy consumption; ultrasonic technology can avoid mechanical friction, but it has insufficient processing capacity for large-sized impurities, and has high equipment cost and maintenance cost, which is not conducive to the promotion of small and medium-sized sewage plants. SUMMARY

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

[0006] The first technical aspect of the present application is achieved by the following technical solution:

[0007] The utility model provides a kind of device for treating urban domestic sewage, including water treatment pond, water collecting pipe and discharge pipe, the water collecting pipe is located above water treatment pond, the discharge pipe is set apart from water collecting pipe and is communicated with water treatment pond, the water treatment pond is provided with filter piece and anti-blocking component along length direction respectively, the filter piece is close to water collecting pipe setting;

[0008] The anti-blocking component moves linearly along the water treatment pond, and the anti-blocking component can intermittently clean the filter piece during linear motion.

[0009] In the above technical solution, the anti-blocking component moves linearly and reciprocally, which realizes intermittent mechanical cleaning of the filter piece, reduces the frequency of manual cleaning, ensures long-term stable operation of the filter piece and maintains smooth discharge, and avoids blockage of the water treatment equipment in the later stage.

[0010] Preferably, the filter piece is provided with a plurality of filter holes in the thickness direction.

[0011] In the above technical solution, the porous structure is arranged in the thickness direction of the filter piece to realize hierarchical or multi-channel flow, which not only ensures the filtration flux but also reduces the influence of single-hole blockage, thereby improving the overall filtration efficiency and stability.

[0012] Preferably, the anti-blocking component includes a limiting shell, a moving plate, and a plurality of cleaning rods, the moving plate is located in the limiting shell, the limiting shell is penetrated by a through hole in the thickness direction, the moving plate and the cleaning rods are fixedly connected, the cleaning rods are penetrated through the through hole and located on both sides of the limiting shell, and both ends of each cleaning rod are rotatably connected with a crushing head, and the crushing head can penetrate the filter hole.

[0013] In the above technical solution, the moving plate drives the cleaning rods and the crushing heads to penetrate the filter hole to mechanically crush and remove the blockage, which can handle the blockage of the card, fiber and agglomeration.

[0014] Preferably, the water treatment pond is provided with a driving member, the limiting shell is provided with a partition plate on the side facing the driving member, the moving plate is located on one side of the partition plate, the length of the partition plate is less than half the length of the limiting shell, and the side of the top surface of the limiting shell opposite to the partition plate forms an overflow channel with the water treatment pond.

[0015] In the above technical solution, the relative positioning of the driving member and the partition plate controls the cleaning stroke and avoids overshoot, and the overflow channel provides an overflow passage when the liquid level in the water treatment pond is high.

[0016] Preferably, the end of the crushing head is provided with a plurality of cleaning teeth, the circumferential radius formed by the plurality of cleaning teeth is less than the radius of the crushing head, the outer surface of the crushing head is provided with a cutting tooth, and the height of the cutting tooth is less than the height of the sliding block.

[0017] In the technical scheme, the end of the crushing head is provided with cleaning teeth for grabbing and stripping the blockage, and the outer surface is provided with cutting teeth for cutting the fibers or long-shaped impurities, so that the mechanical cleaning capacity is ensured, interference or damage with the sliding member is avoided, and the reliability and service life are improved.

[0018] Preferably, a filter residue component is arranged in the water treatment tank, and the filter residue component is located on the side of the anti-blocking assembly away from the filter component, and a plurality of filter holes are arranged on the filter residue component.

[0019] In the technical scheme, a second component is arranged behind the filter component for collecting small solid particles or crushed solid particles that still need to be discharged after being treated by the anti-blocking assembly, so that a multi-stage filtering and separating channel is formed, and the cumulative load on the subsequent water treatment equipment is reduced.

[0020] Preferably, a sleeve is rotatably connected in the filter hole, a spiral groove is arranged in the sleeve, a guide groove is arranged in the filter hole, transition grooves are arranged at both ends of the length direction of the guide groove, a sliding block is slidably connected in the guide groove, the sliding block is also slidably connected with the spiral groove and located in the filter hole at the end, and an elastic pad is arranged in the transition groove.

[0021] In the technical scheme, the sleeve is rotatable in cooperation with the annular boss and the sliding block, and the cleaning teeth and the cutting teeth of the crushing head can be used to clear the blockage.

[0022] Preferably, a groove is formed on the side of the filter residue component close to the limiting shell, a protrusion is formed on the side of the limiting shell facing the filter residue component, a guide rail is arranged on the water treatment tank between the filter residue component and the filter component, and a sliding groove is arranged at the bottom of the limiting shell and slidably connected with the guide rail.

[0023] In the technical scheme, the groove and the protrusion cooperate to generate a local attractive force after the limiting shell and the filter residue component are in contact and separated, so that the broken residue is removed and the cleaning capacity is improved.

[0024] Preferably, a collection tank is arranged on one side of the water treatment tank in the length direction, a collection component is arranged on the top of the water treatment tank, the collection component is rotatably connected with a rotating arm, a material collecting hopper is arranged at the end of the rotating arm, and the rotating path of the material collecting hopper passes through the side surface of the filter component.

[0025] In the technical scheme, the rotating collection component is arranged to collect and transfer large garbage along the side surface of the filter component, so that the large garbage is timely removed from the filter surface and concentrated in the collection tank, and the large garbage is prevented from flowing back or blocking the filter surface.

[0026] Preferably, the top surface of the filter and the filter residue 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 plate is higher than the height of the filter and the filter residue.

[0027] In the above technical solution, the top surface of the limiting shell is lower than the liquid level, ensuring that some cleaning and unblocking components or moving parts work in a sub-liquid environment to penetrate the filter hole; the height of the partition plate is higher than the height of the filter, forming an appropriate liquid level / isolation, and cooperating with the overflow groove to control the liquid flow path and the cleaning and unblocking working condition, so as to balance the interception efficiency and the effectiveness of cleaning and unblocking.

[0028] In a second technical aspect of the present application, a treatment method for urban domestic sewage is provided, which is realized by using the urban domestic sewage treatment device in the first technical aspect of the present application, and comprises the following steps:

[0029] S1, collecting sewage; collecting urban domestic sewage for centralized treatment and then discharging to the water treatment tank through a water collecting pipe;

[0030] S2, filtering and collecting residues;

[0031] S3, performing cleaning and crushing based on the filtering and collecting residues;

[0032] S4, discharging sewage.

[0033] In the above technical solution, the cleaning and crushing steps are simultaneously or periodically performed during the filtering process, so that the filtering process is not interrupted or interrupted less, continuous or semi-continuous treatment is realized, the treatment efficiency is improved, and manual intervention is reduced.

[0034] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0035] 1. In the present application, urban domestic sewage is discharged to the water treatment tank, and then passes through the filter and the filter residue, so that the content of impurities in the sewage is reduced, and the subsequent water treatment equipment is prevented from being blocked.

[0036] 2. In the present application, the limiting shell can reciprocally move towards the filter and the filter residue under the control of the moving plate, and in the moving process, the crushing head penetrates the filter hole, can crush and separate the garbage remaining in the filter hole and blocking the filter hole, reduce the volume, and pass through the filter hole, further reducing the risk of blocking the subsequent water treatment equipment. DETAILED DESCRIPTION

[0037] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and constitute a part of the application, illustrate embodiments of the present application and do not limit the present application. In the drawings:

[0038] Figure 1 Fig. 1 is a structural schematic view of the limiting shell located in the middle of the water treatment tank in the present application;

[0039] Figure 2 For Figure 1 partial enlarged view of A in the middle;

[0040] Figure 3 For the structure diagram when the limiting shell and the filter piece are attached in the application;

[0041] Figure 4 For Figure 3 partial enlarged view of B in the middle;

[0042] Figure 5 For the structure diagram when the limiting shell and the filter residue piece are attached in the application;

[0043] Figure 6 For Figure 5 partial enlarged view of C in the middle;

[0044] Figure 7 For the sectional view of the water treatment tank in the application;

[0045] Figure 8 For the structure diagram when the breaking head passes through the filter hole in the application;

[0046] Figure 9 For Figure 8 partial enlarged view of D in the middle;

[0047] Figure 10 For the structure diagram of the water treatment tank in the application;

[0048] Figure 11 For the exploded view of the limiting shell and the moving plate in the application;

[0049] Figure 12 For the exploded view of the clearing rod, the breaking head and the sleeve in the application.

[0050] The represented by the reference signs are:

[0051] 1, water treatment tank; 11, water collecting pipe; 12, discharge pipe; 13, guide rail; 2, filter piece; 21, filter hole; 22, guide groove; 23, transition groove; 24, sliding block; 3, filter residue piece; 31, groove; 4, limiting shell; 41, partition; 42, protrusion; 5, moving plate; 51, clearing rod; 6, breaking head; 61, annular boss; 62, cleaning tooth; 63, cutting tooth; 7, sleeve; 8, collection tank; 81, collection piece; 82, material collecting hopper. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0053] Example 1

[0054] 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 located away from the water collection pipe 11 and connected to the water treatment tank 1. The water treatment tank 1 is characterized by having a filter element 2 and an anti-clogging component respectively arranged along its length, with the filter element 2 located close to the water collection pipe 11.

[0055] The anti-clogging component moves in a straight line along the water treatment tank 1. During this linear movement, the anti-clogging component can intermittently clear the blockage of the filter element 2.

[0056] like Figures 1 to 6 , Figure 10 As shown, the filter element 2 has a plurality of filter holes 21 along the thickness direction.

[0057] like Figures 1 to 6 , Figure 11 As shown, the anti-blocking component includes a limiting housing 4, a movable plate 5, and several unblocking rods 51. The movable plate 5 is located inside the limiting housing 4. The limiting housing 4 has a through hole along its thickness direction. The movable plate 5 and the unblocking rods 51 are fixedly connected. The unblocking rods 51 pass through the through hole on both sides of the limiting housing 4. Both ends of the unblocking rods 51 are rotatably connected to a crushing head 6. The crushing head 6 can pass through the filter hole 21.

[0058] like Figures 1 to 7 , Figure 11 As shown, a driving component is provided on the water treatment tank 1, and a partition 41 is provided on the side of the top of the limiting housing 4 facing the driving component. The moving 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 housing 4. The side of the top surface of the limiting housing 4 opposite to the partition 41 forms an overflow trough with the water treatment tank 1.

[0059] like Figures 1 to 7 As shown, it also includes a filter cake 3 installed in the water treatment tank 1. The filter cake 3 is located on the side of the anti-clogging component away from the filter element 2, and a number of filter holes 21 are also provided on the filter cake 3.

[0060] like Figures 1 to 7 As shown, the top surfaces of filter element 2 and filter cake element 3 are higher than the maximum liquid level in water treatment tank 1, the top surface of limiting housing 4 is lower than the liquid level in water treatment tank 1, and the height of partition 41 is higher than the height of filter element 2 and filter cake element 3.

[0061] As shown in Figures 1 to 7 、 Figure 10 , the filter residue part 3 is formed with a groove 31 on the side close to the limiting shell 4, the limiting shell 4 is formed with a protrusion 42 on the side facing the filter residue part 3, the water treatment tank 1 between the filter residue part 3 and the filter part 2 is provided with a guide rail 13, and the bottom of the limiting shell 4 is provided with a sliding groove in sliding connection with the guide rail 13.

[0062] Specifically, before the municipal domestic sewage is discharged to the water treatment equipment, pretreatment is performed to reduce the non-degradable and easily clogging substances such as wet paper towels, plastic film, food packaging bags, hair, and fiber fabric debris in the sewage; the sewage is discharged through the water collecting pipe 11 to the water treatment tank 1, and the water entering the water treatment tank 1 passes through the filter part 2, the anti-clogging assembly, and the filter residue part 3, and is then discharged through the discharge pipe 12, which is provided with a valve for opening and closing the discharge pipe 12; when the sewage is initially discharged along the water collecting pipe 11, the discharge pipe 12 can be closed, and when the water level in the water treatment tank 1 is constant at the height of the filter part 2, the discharge pipe 12 can be slowly opened, so that the water surface height in the water treatment tank 1 is always maintained at the height of the filter part 2, and the minimum height is not lower than the height of the top of the limiting shell 4.

[0063] The filter part 2 and the filter residue part 3 form a water storage space, and the total length of the water storage space is greater than the length of the clearing rod 51; when the sewage passes through the filter part 2, the water body and small impurities enter the water storage space through the filter holes 21, pass through the filter residue part 3 along the top of the limiting shell 4, and then enter the discharge pipe 12, and large impurities are blocked by the filter part 2 and cannot pass through, thereby avoiding subsequent clogging of the water tank treatment equipment.

[0064] Specifically, the limiting shell 4 is formed with a containing groove, the sliding 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 part 2 and the filter residue part 3, the top of the limiting shell 4 is connected with a partition plate 41, the partition plate 41 is in U-shaped or rectangular structure, the maximum length of the partition plate 41 should be half of the length of the limiting shell 4, so as to provide a flow space for the sewage, the moving plate 5 is located in the containing groove of the limiting shell 4, and the top of the moving plate 5 extends to the partition plate 41, the water treatment tank 1 is provided with a driving part, the output end of the driving part is connected with the top of the moving plate 5, and preferably, the driving part can be a linear motion mechanism such as a pneumatic cylinder, a hydraulic cylinder, or a screw rod; the two side surfaces of the moving plate 5 in the limiting shell 4 are both fixedly connected with the clearing rod 51, and correspondingly, the two side surfaces of the limiting shell 4 are both provided with through holes for the clearing rod 51 to pass through, and the filter holes 21 on the filter part 2 and the filter residue part 3 also correspond to the clearing rod 51, so that the clearing rod 51 can pass through to realize clearing, and preferably, the filter holes 21 on the filter residue part 3 can be smaller than the filter holes 21 on the filter part 2, so as to further improve the clearing effect.

[0065] The sewage unblocking mode of the present embodiment is as follows: when the sewage discharged by the collecting pipe 11 continuously flows along the water treatment tank 1, the sewage enters the water storage space through the filter holes 21 of the filter 2, and the filter 2 filters out large impurities and leaves them in front. The sewage between the filter 2 and the limiting shell 4 flows to the filter residue 3 through the top of the limiting shell 4. The top surface of the limiting shell 4 is lower than the filter 2, and there is a flow space between the baffle 41 and the water treatment tank 1 for the sewage to pass through, so that the sewage can smoothly flow to the filter residue 3. The filter residue 3 then performs secondary filtration again to discharge the sewage to the discharge pipe 12.

[0066] During the sewage flow, the moving plate 5 can be driven to move by the driving member, thereby driving the limiting shell 4 to move. For example, when the moving plate 5 is controlled to move towards the filter 2, the moving plate 5 first moves in the baffle 41 until it is limited by the contact with the baffle 41, thereby driving the limiting shell 4 to move. The limiting shell 4 finally contacts the fixed filter 2. At this time, the unblocking rod 51 has already passed through the filter holes 21 on the filter 2, and the impurities such as hair in the sewage can be cleaned to avoid affecting the water yield of the filter holes 21. Conversely, when the limiting shell 4 moves away from the filter 2 towards the filter residue 3, the moving plate 5 moves in the same way, which will not be described here. The filter residue 3 is provided with a groove 31 on the side facing the limiting shell 4, and the limiting shell 4 is formed with a protrusion 42 on the side facing the filter residue 3. When the limiting shell 4 cooperates with the filter residue 3, the protrusion 42 presses the groove 31, the unblocking rod 51 passes through and blocks the filter holes 21, thereby achieving the effect of temporarily isolating the sewage flow at the filter residue 3. When the limiting shell 4 moves away from the filter residue 3 again towards the filter 2, the protrusion 42 and the unblocking rod 51 move away from the filter residue 3, and the sewage continues to flow. At this time, the filter residue 3 can generate an attractive force, which can not only take away the impurities on the filter holes 21 of the filter residue 3, but also take out the impurities floating in the water storage space, thereby enhancing the sewage treatment effect.

[0067] Embodiment 2

[0068] The present embodiment is based on the further cleaning and anti-blocking of the filter 2 and the filter residue 3 in embodiment 1.

[0069] As shown in Figures 1 to 9 , Figure 12 , the end of the crushing head 6 is provided with a plurality of cleaning teeth 62, and the cleaning teeth 62 form a smaller radius than the radius of the crushing head 6. The outer surface of the crushing head 6 is provided with cutting teeth 63, and the height of the cutting teeth 63 is smaller than the height of the sliding block 24.

[0070] As shown in Figures 1 to 9 , Figure 12As shown, the filter hole 21 is rotatably connected with a sleeve 7, the sleeve 7 is provided with a spiral groove, the filter hole 21 is provided with a guide groove 22, the two ends of the length direction of the guide groove 22 are provided with a transition groove 23, the guide groove 22 is slidably connected with a sliding block 24, the sliding block 24 is also slidably connected with the spiral groove and the end part is located in the filter hole 21, the transition groove 23 is provided with an elastic pad, and the outer surface of the crushing head 6 is provided with an annular boss 61.

[0071] Specifically, the end part of the clearing rod 51 is rotatably connected with a crushing head 6, the crushing head 6 can pass through the filter hole 21, the outer circumferential surface of the crushing head 6 is connected with an annular boss 61, the filter hole 21 is rotatably connected with a sleeve 7, the sleeve 7 is provided with a spiral groove, correspondingly, the filter hole 21 is provided with a guide groove 22, the guide groove 22 is a linear structure, and the two ends of the length direction of the guide groove 22 are provided with a transition groove 23, the transition groove 23 is provided with an elastic pad, when the annular boss 61 drives the sliding block 24 to move to the elastic pad close to the water collecting pipe 11, the sliding block 24 can be slidably connected in the guide groove 22 and the spiral groove, the sliding block 24 is pressed downward towards the elastic pad, the elastic pad is contracted, the sliding block is moved downward, the annular boss 61 passes through the sliding block as a whole, and then the crushing head is extended out of the filter hole, when returning, the sliding block 24 is located at the side of the annular boss 61 close to the limiting shell 4, and the annular boss 61 drives the sliding block to move from the transition groove to the guide groove 22, preferably, the connection part of the transition groove and the guide groove 22 is provided with an arc transition section, which facilitates the movement of the sliding block 24, and in the returning process of the annular boss 61, the sliding block 24 is driven to move, and the sleeve 7 is rotated again until the crushing head 6 leaves and the sliding block 24 returns to the original position.

[0072] As the moving mode in example 1, when the clearing rod 51 controls the crushing head 6 to enter the filter hole 21, the annular boss 61 pushes the sliding block 24 in the filter hole 21 to slide along the guide groove 22, in the process of moving the sliding block 24, the sliding block 24 will contact with the side wall of the spiral groove and produce a guiding effect, and then drive the sleeve 7 to rotate until the crushing head 6 is extended out of the moving plate 5 and stops moving; in the process of linear movement of the crushing head 6 and rotation of the sleeve 7, if there are hairs, films, fibers and other sundries in the sleeve 7, i.e. in the filter hole 21, the rotating sleeve 7 will cut and shred these sundries on the cutting teeth 63 of the crushing head 6 into smaller impurities, avoiding being blocked in the filter hole 21, and also facilitating subsequent sewage treatment equipment to treat sewage, avoiding blockage.

[0073] In addition, the sewage may also contain flexible large debris such as wet wipes, cloth, etc. Due to the flexibility of the debris itself and the tension of the sewage, the debris will adhere to the filter element 2, causing large-area blockage and affecting the normal operation of the water treatment tank 1. When the breaking head 6 is exposed to the filter element 2 through the filter hole 21, the large debris at the filter hole 21 will be lifted. The movement of multiple breaking 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 breaking head 6 are relatively sharp, which can cut or tear the large debris mentioned above to a certain extent, reducing the area of the large debris. In the multiple cycles of the limiting shell 4, the large debris at the front end of the filter element 2 can be effectively cut by the breaking head 6, avoiding blockage.

[0074] In the process of cleaning the filter residue element 3, the same as the above, when the limiting shell 4 is away, a large amount of cut debris is sucked away by the suction force at the filter residue element 3, including the debris in the water storage space and the filter hole 21 of the filter residue element 3. It should be noted that the length in the water storage space should meet the reciprocating movement of the limiting shell 4, and when the limiting shell 4 is centered, the two sides of the unblocking rod 51 neither contact the filter element 2 nor contact the filter residue element 3. In several reciprocating cycles, the small impurities broken in the water storage space can be disturbed by the fluid by the sewage with the help of the several arranged breaking heads 6, thereby reducing the deposition of small impurities in the water storage space. It can move to the filter residue element 3 with the disturbed water flow and be discharged, and when the limiting shell 4 contacts the filter element 2 and the filter residue element 3, it can also extrude the broken debris. Thus, the cycle of extrusion and breaking is realized in the water storage space until it enters the filter residue element 3 and is discharged, realizing further breaking and unblocking, reducing the volume and preventing blockage.

[0075] Embodiment 3

[0076] As shown in Figures 1 to 6 The water treatment tank 1 is provided with a collecting tank 8 on one side in the length direction, and the top of the water treatment tank 1 is provided with a collecting element 81. The collecting element 81 is rotationally connected with a rotating arm, and the end of the rotating arm is provided with a material collecting hopper 82. The rotating path of the material collecting hopper 82 passes through the side of the filter element 2.

[0077] Specifically, the collecting element 81 is connected with a motor, which can control the rotating arm to make reciprocating motion along the collecting tank 8 and the water treatment tank 1. When there are large debris such as mentioned in Embodiment 2 at the front end of the filter element 2, the material collecting hopper 82 can capture these large debris, as well as other captured debris and cut debris into the collecting tank 8.

[0078] It should be noted that the present application is a pretreatment for sewage treatment, the purpose is to reduce the sundries in municipal domestic sewage, to avoid the sewage treatment in later stage, blockage of water treatment equipment; part of the sundries left in the front end of the filter 2 is taken away by the collecting hopper 82 into the collection tank 8, part of the sundries is broken into smaller and less likely to be blocked after multiple cycles of the limiting shell 4, and finally discharged into the discharge pipe 12, there is still a part of the sundries left in the front end of the filter 2.

[0079] When the municipal domestic sewage treatment device of the present application works, the collecting pipe 11 will continuously discharge sewage into the water treatment tank 1, so the water in the water treatment tank 1 is flowing, so the sundries in the front end of the filter 2 in the water treatment tank 1 will keep rolling in the water under the action of the water discharge of the collecting pipe 11, when the sundries approach the filter 2, the sundries which are not easy to block pass through the filter hole 21; the sundries which are easy to block are broken and cut by the breaking head 6, part of the sundries are captured by the collecting hopper 82 into the collection tank 8, thereby reducing the risk of blockage.

[0080] Preferably, the collecting hopper 82 in the present application is not only a hopper structure, but also can be a plate, a block, or even a brush structure, and the effect is to brush off and take away the sundries attached to the filter 2.

[0081] Embodiment 4

[0082] A method for treating municipal domestic sewage, based on the municipal domestic sewage treatment device provided in embodiments 1 to 3 to realize sewage treatment, comprising:

[0083] S1, collecting sewage; collecting municipal domestic sewage after centralized treatment and discharging through the collecting pipe 11 to the water treatment tank 1;

[0084] S2, filtering and collecting residues;

[0085] S21, the domestic sewage flows through the filter 2, small impurities pass through the filter hole 21, and large impurities are left at the filter 2;

[0086] S22, the small impurities pass through the filter residue part 3 after the anti-blocking assembly;

[0087] S23, the collecting part 81 collects large garbage outside the filter 2 to the collection tank 8 during movement;

[0088] S3, performing unblocking and crushing based on the process of filtering and collecting residues;

[0089] S31, the moving plate 5 drives the limiting shell 4 to move towards the filter 2, and the breaking head 6 penetrates the filter hole 21 of the filter 2;

[0090] S32, the moving plate 5 drives the limiting shell 4 to move towards the filter residue part 3, and the breaking head 6 penetrates the filter hole 21 of the filter residue part 3.

[0091] S33, repeating S31 and S32;

[0092] S4, sewage discharge.

[0093] Specifically, the municipal domestic sewage is discharged to the water treatment tank 1 through the water collecting pipe 11, and the sewage is filtered by the filter 2, the limiting shell 4 and the filter residue 3 in stages, and finally discharged by the discharge pipe 12 for sewage treatment 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 contacting with the filter 2 or the filter residue 3, the breaking head 6 passes through the corresponding filter hole 21, and the garbage in the filter hole 21 is separated, reduced in volume and reduced in the risk of subsequent water treatment tank 1 blockage.

[0094] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A device for treating urban domestic sewage, comprising a water treatment tank (1), a collection pipe (11), and a discharge pipe (12), wherein the collection pipe (11) is located above the water treatment tank (1), and the discharge pipe (12) is disposed away from the collection pipe (11) and connected to the water treatment tank (1), characterized in that: The water treatment tank (1) is provided with a filter element (2) and an anti-clogging component along its length, and the filter element (2) is located close to the water collection pipe (11); The anti-clogging component moves in a straight line along the water treatment tank (1), and the anti-clogging component can intermittently clear the filter element (2) during the straight line movement; The filter element (2) has a plurality of filter holes (21) along the thickness direction; The anti-blocking component includes a limiting shell (4), a movable plate (5), and several unblocking rods (51). The movable plate (5) is located inside the limiting shell (4). The limiting shell (4) has a through hole along its thickness direction. The movable plate (5) and the unblocking rods (51) are fixedly connected. The unblocking rods (51) pass through the through hole on both sides of the limiting shell (4). Both ends of the unblocking rods (51) are rotatably connected to a crushing head (6). The crushing head (6) can pass through the filter hole (21). The water treatment tank (1) is equipped with a driving component, and the output end of the driving component is connected to the top of the moving plate (5). 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); It also includes a filter cake (3) installed in the water treatment tank (1). The filter cake (3) is located on the side of the anti-clogging component away from the filter element (2). The filter cake (3) is also provided with a number of filter holes (21). A sleeve (7) is rotatably connected inside the filter hole (21). A spiral groove is provided inside the sleeve (7). A guide groove (22) is provided inside the filter hole (21). Transition grooves (23) are provided at both ends of the guide groove (22) along its length. A slider (24) is slidably connected inside the guide groove (22). The slider (24) is also slidably connected to the spiral groove and its end is located inside the filter hole (21). An elastic pad is provided inside the transition groove (23). An annular boss (61) is provided on the outer surface of the crushing head (6).

2. The device for treating urban domestic sewage according to claim 1, characterized in that: The top of the limiting housing (4) is provided with a partition (41) on the side facing the drive member. The moving 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 housing (4). The top surface of the limiting housing (4) relative to the partition (41) forms an overflow trough with the water treatment tank (1).

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

4. The device for treating urban domestic sewage according to claim 1, characterized in that: A collection tank (8) is also provided on one side of the water treatment tank (1) along its length. A collection component (81) is provided on the top of the water treatment tank (1). The collection component (81) is rotatably connected to a rotating arm. A material collection hopper (82) is provided at the end of the rotating arm. The rotation path of the material collection hopper (82) passes through the side of the filter element (2).

5. A device for treating urban domestic sewage according to claim 2, characterized in that: The top surfaces of the filter element (2) and filter residue element (3) are higher than the maximum liquid level in the water treatment tank (1), the top surface of the limiting 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 filter residue element (3).

6. A device for treating urban domestic sewage according to claim 2, characterized in that: The filter holes (21) of the filter element (3) are smaller than the filter holes (21) of the filter element (2).

7. A method for treating urban domestic sewage, based on the urban domestic sewage treatment device according to claim 4, characterized in that: include: S1. Collect sewage; After centralized treatment, urban domestic sewage is collected and discharged into the water treatment pond (1) through the collection pipe (11). S2, Filter and collect residue; S3. Perform unblocking and crushing during the filtration and slag collection process; S4. Wastewater discharge.

8. A method for treating urban domestic sewage according to claim 7, characterized in that: S2 includes: S21. Domestic sewage flows through the filter element (2), small impurities pass through the filter holes (21), and large impurities remain at the filter element (2); S22. Small impurities are discharged through the filter cake (3) after passing through the anti-clogging component; S23. During the movement of the collecting component (81), the large garbage outside the filter component (2) is collected into the collection pool (8). S3 includes: S31, The moving plate (5) drives the limiting housing (4) to move toward the filter element (2), and the crushing head (6) passes through the filter hole (21) of the filter element (2). S32, The moving plate (5) drives the limiting housing (4) to move toward the filter cake (3), and the crushing head (6) passes through the filter hole (21) of the filter cake (3). S33, repeat S31 and S32.

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