Leachate filtering device

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a leachate filtering device which comprises a box body, a partition plate, a liquid inlet pipe and a filtering mechanism, the partition plate is fixedly arranged in the box body and divides the accommodating chamber of the box body into a clear liquid chamber and a sundry chamber; the filtering mechanism comprises a filtering plate, a rotating shaft and a fixing piece; the rotating shaft is arranged above the partition plate, and the rotating shaft is rotationally connected with the box body; the filter plate is fixedly connected with the rotating shaft; the fixing piece is arranged between the filter plate and the inner peripheral wall of the box body and is used for forcing the filter plate to be close to the inner peripheral wall of the box body; the liquid inlet pipe is fixedly arranged in the containing cavity of the box body and arranged above the clear liquid cavity, and the liquid inlet pipe conveys a penetrating fluid stock solution into the containing cavity. According to the filtering device, through the cooperation of the fixing piece and the filtering plate, impurities on the filtering plate are automatically collected while the filtering plate filters out the impurities in the stock solution of the leachate, and the use efficiency of the filtering device for the leachate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and in particular to a filtering device for leachate. Background Art

[0002] Waste incineration power plants produce leachate, which mainly comes from garbage pits and is the water that seeps out of the garbage in the garbage pits. The leachate from waste incineration power plants is a kind of high-concentration organic wastewater that is difficult to treat. The leachate contains a large amount of organic matter, ammonia nitrogen, heavy metals and other pollutants; if the leachate is discharged directly, it will cause serious pollution to the soil, water and atmosphere.

[0003] In the prior art, incineration can be used to treat leachate. That is, the leachate in the garbage pit is initially filtered through the garbage cushion layer and collected in the foundation pit through the leachate gallery. Subsequently, the leachate is transported to the leachate treatment system and the leachate spray back system through the discharge pump. The leachate treatment system further treats the leachate, and the leachate spray back system sprays the leachate back into the incinerator, thereby incinerating the leachate.

[0004] After the leachate is treated by the leachate treatment system, the leachate still contains impurities, which will affect the leachate spray back system to spray the leachate back into the incinerator. In the prior art, a filter can be added between the leachate treatment system and the leachate spray back system to filter the impurities in the leachate. However, impurities are easily accumulated on the filter plate in the filter, causing the filter to be abnormal or malfunction, affecting the normal operation of the filter. Summary of the invention

[0005] In order to reduce the accumulation of impurities on the filter plate and reduce the impact of the impurity accumulation on the filter device, the present application provides a leachate filtering device.

[0006] The present application provides a leachate filtering device, which adopts the following technical solution: A filter device for leachate, comprising a box body, a partition plate, a liquid inlet pipe and a filter mechanism; a accommodating chamber is provided inside the box body, the partition plate is fixedly arranged inside the box body, and the partition plate divides the accommodating chamber into a clear liquid chamber and a debris chamber; the box body is provided with a clear liquid outlet and a debris outlet, the clear liquid outlet is connected to the clear liquid chamber, and the debris outlet is connected to the debris chamber; the filter mechanism comprises a filter plate, a rotating shaft and a fixing member; the rotating shaft is arranged above the partition plate, and the rotating shaft and the partition plate are located on the same vertical plane, and the rotating shaft is rotatably connected to the box body; the filter plate is fixedly connected to the rotating shaft, and the filter plate is fully provided with a plurality of filter holes, and along the direction from the clear liquid chamber to the debris chamber, the filter plate comprises a first side edge and a second side edge which are arranged oppositely. two sides, the elevation of the first side is greater than the elevation of the second side; under normal conditions, the vertical projection surface of the filter plate covers the accommodating chamber; the fixing member is arranged between the filter plate and the inner wall of the box body, and the fixing member is used to force the second side to be close to the inner wall of the box body; the liquid inlet pipe is fixed in the accommodating chamber of the box body, and the liquid inlet pipe is arranged above the clear liquid chamber, and the liquid inlet pipe transports the permeate stock liquid into the accommodating chamber; the permeate stock liquid is filtered into the clear liquid chamber through the filter plate, and the impurities in the permeate stock liquid are accumulated on the filter plate, and the impurities are accumulated above the debris chamber; when the force of the impurities on the filter plate is greater than the force of the fixing member on the filter plate, the filter plate rotates downward, so that the impurities on the filter plate fall into the debris chamber.

[0007] By adopting the above technical solution, when the leachate stock solution falls onto the filter plate, the permeate stock solution will flow along the filter plate, and most of the leachate stock solution will fall into the clear liquid chamber; while the impurities in the leachate stock solution will be retained on the filter plate, and the impurities will accumulate on the filter plate above the debris chamber under the combined effect of the leachate stock solution and gravity.

[0008] When the force exerted by the impurities on the filter plate is greater than the force exerted by the fixing member on the filter plate, the filter plate rotates and tilts downward; the inclination angle of the filter plate is large, and the distance between the second side and the box body becomes larger, so that the impurities on the filter plate fall into the debris chamber. Subsequently, under the action of the fixing member, the filter plate returns to its original tilted state to complete the impurity collection process.

[0009] In the present technical solution, through the coordinated cooperation of the fixing part and the filter plate, the filter plate can filter out impurities in the leachate raw liquid while realizing automatic collection of impurities on the filter plate; thereby reducing the failure rate of the leachate filtering device, facilitating the maintenance of the leachate filtering device, and improving the utilization efficiency of the leachate filtering device; and the impurities on the filter plate do not need to be manually cleared or cleaned, thereby reducing labor input.

[0010] Optionally, the distance from the rotation axis to the first side is greater than the distance from the rotation axis to the second side.

[0011] By adopting the above technical solution, the distance from the rotating axis to the first side is greater than the distance from the rotating axis to the second side; that is, the design length of the clear liquid chamber is greater than the design length of the debris chamber, so that most of the leachate stock liquid flows into the clear liquid chamber, and the leachate stock liquid flows into the debris chamber, thereby improving the filtering effect of the filtering device.

[0012] Optionally, the fixing member includes a first magnetic member and a second magnetic member arranged opposite to each other, the first magnetic member is fixedly arranged on the second side of the filter plate, the second magnetic member is fixedly arranged on the inner wall of the box, and the first magnetic member is attracted to the second magnetic member; the filtering device also includes a first flexible limit member and a second flexible limit member, the first flexible limit member and the first magnetic member are located on the same plane, and the first flexible limit member is arranged on the side of the first magnetic member close to the filter plate, and the first flexible limit member abuts against the filter plate; the second flexible limit member is fixedly connected to the inner wall of the box, the second flexible limit member is arranged on the moving path of the filter plate, and the second flexible limit member is used to limit the rotation of the filter plate.

[0013] By adopting the above technical solution, when the force exerted by the impurities on the filter plate is greater than the suction force of the second magnetic member on the first magnetic member, when the filter plate rotates downward, a channel for the impurities to fall is provided between the second side of the filter plate and the box body. After the impurities on the filter plate fall into the debris chamber, the filter plate abuts against the second flexible stopper, so that the filter plate rotates toward the first flexible stopper. Under the action of the first magnetic member and the second magnetic member, the filter plate collides with the second flexible stopper to shake the impurities remaining on the filter plate, so as to facilitate the subsequent cleaning of the impurities.

[0014] Optionally, it also includes a collecting mechanism, the collecting mechanism includes a container and a filter assembly, the container is fixed on the inner wall of the box, and the container is used to accommodate the filter assembly; the filter assembly includes a plurality of collecting members, and the plurality of collecting members are connected in sequence; the collecting member includes a first filter mesh cloth, a second filter mesh cloth and an expansion member; when the first filter mesh cloth is laid on the filter plate, the first filter mesh cloth is arranged on the side of the second filter mesh cloth away from the filter plate, the second filter mesh cloth and the first filter mesh cloth are surrounded by a container bag, and the bag opening of the container bag is arranged toward the first side of the filter plate; the expansion member It is arranged between the first filter mesh cloth and the second filter mesh cloth, the expansion piece forces the second filter mesh cloth to separate from the first filter mesh cloth, so that the bag mouth of the containing bag opens, and the containing bag is used to collect impurities; along the conveying direction of the collecting piece, the adjacent collecting pieces are named as the first collecting piece and the second collecting piece in sequence, and the first collecting piece is laid on the filter plate; when the force of the impurities on the filter plate is greater than the force of the fixing piece on the filter plate, the first collecting piece passes through the gap between the filter plate and the box body and falls into the debris chamber, and the first collecting piece pulls the second collecting piece to be laid on the filter plate.

[0015] By adopting the above technical solution, the first filter mesh cloth of the collecting element is laid on the filter plate to improve the filtering effect of impurities in the leachate; at the same time, the filter mesh bag formed by the first filter mesh cloth and the second filter mesh cloth will collect most of the impurities.

[0016] When enough impurities are collected in the first collecting member, the impurities exert a downward force on the filter plate, so that the second side of the filter plate is separated from the box body; thus, the first collecting member passes through the channel between the second side and the box body and falls into the debris chamber. That is, the first collecting member cleans the impurities accumulated on the filter plate into the debris chamber, reducing the impact of the impurities on the filter device and improving the use efficiency of the filter device. And during the falling process, the first collecting member pulls the second collecting member onto the filter plate to repeat the above impurity cleaning process.

[0017] Optionally, a guide roller is further provided on the filter plate, and the guide roller is arranged on the first side of the filter plate. A gap is provided between the guide roller and the filter plate for the collecting member to pass through.

[0018] By adopting the above technical solution, a guide roller is arranged on the filter plate to guide the collecting member, thereby improving the fit between the collecting member and the filter plate and improving the collection effect of the collecting member on impurities.

[0019] Optionally, a tear line is provided between several collecting pieces, and two adjacent collecting pieces are separated along the tear line; when the first collecting piece falls into the debris chamber, the second collecting piece is laid on the filter plate, and the filter plate returns to normal, the force exerted by impurities on the first collecting piece forces the first collecting piece and the second collecting piece to separate along the tear line.

[0020] By adopting the above technical solution, adjacent collecting pieces are separated by tear lines to reduce mutual interference between the collecting pieces, which is beneficial for laying the collecting pieces on the filter plate and improving the collecting effect of the collecting pieces on impurities.

[0021] Optionally, it also includes an intercepting mechanism, which is fixed on the inner wall of the box body, and the intercepting mechanism is arranged in the debris chamber, and the intercepting mechanism is arranged on the moving path of the collecting piece; the intercepting mechanism includes a plurality of support columns, and the support columns are arranged obliquely downward, and the length of the support columns increases along the moving direction of the collecting piece; the first collecting piece is separated from the intercepting mechanism, and the second collecting piece is laid on the second side of the filter plate.

[0022] By adopting the above technical solution, when the first collecting piece falls, several support columns exert an upward force on the first collecting piece, causing the first collecting piece to fall slowly; during this process, the first collecting piece pulls the second collecting piece, causing the second collecting piece to be laid on the filter plate.

[0023] Subsequently, the filter plate is reset under the action of the fixing member to reduce the distance between the second side and the box body. After the first collecting member is separated from the interception mechanism, the second collecting member is laid on the second side of the filter plate; at this time, the gap between the filter plate and the box body is smaller than the collection bag after the opening, that is, the filter plate and the box body have a limiting effect on the second collecting member; and after the first collecting member is separated from the interception assembly, the force of the first collecting member on the second collecting member becomes larger, so that the first collecting member and the second collecting member are separated. At this point, the first collecting member is collected in the debris chamber, and the second collecting member is laid on the filter plate to repeat the above operation.

[0024] Optionally, the fixing member is a spring, one end of the spring is fixedly connected to the filter plate, and the other end of the spring is fixedly connected to the inner peripheral wall of the box body.

[0025] By adopting the above technical solution, the filter plate can be automatically reset through the elastic force of the spring.

[0026] Optionally, the angle between the filter plate and the vertical plane is 55°.

[0027] By adopting the above technical solution, the filter plate is tilted at 55 degrees, so that when the leachate raw liquid flows on the filter plate, the impurities on the filter plate are washed to the filter plate above the debris chamber.

[0028] Optionally, the angle between the liquid outlet direction of the liquid inlet pipe and the horizontal plane is 45°.

[0029] By adopting the above technical solution, when the leachate raw liquid is flushed onto the filter plate, the leachate raw liquid can flush the impurities on the filter plate to above the debris chamber.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: Through the coordinated cooperation between the fixing member and the filter plate, the filter plate can filter out impurities in the original leachate solution while automatically collecting the impurities on the filter plate, thereby improving the use efficiency of the leachate filtering device; When enough impurities are collected in the first collecting piece, the impurities exert a downward force on the filter plate, so that the second side of the filter plate is separated from the box body; thus, the first collecting piece passes through the channel between the second side and the box body and falls into the debris chamber. That is, the first collecting piece cleans the impurities accumulated on the filter plate into the debris chamber, reducing the impact of the impurities on the filter device and improving the efficiency of the filter device. And during the falling process, the first collecting piece pulls the second collecting piece onto the filter plate to repeat the above impurity cleaning process; Adjacent collecting pieces are separated by tear lines to reduce mutual interference between the collecting pieces, which is beneficial for laying the collecting pieces on the filter plate and improving the collecting effect of the collecting pieces on impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the filtering device in Example 1.

[0032] Figure 2 Schematic diagram of the internal structure of the filtering device in Example 1.

[0033] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0034] Figure 4 It is a structural schematic diagram of the first state of the filtering mechanism in Example 1.

[0035] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0036] Figure 6 It is a structural schematic diagram of the second state of the filtering mechanism in Example 1.

[0037] Figure 7It is a structural schematic diagram of the first state of the filtering mechanism in Example 2.

[0038] Figure 8 yes Figure 7 Enlarged view of point C in the middle.

[0039] Fig. 9 It is a schematic diagram of the internal structure of the filtering device in Example 3.

[0040] Fig.10 yes Fig. 9 Enlarged view of point D in the middle.

[0041] Fig.11 It is a structural schematic diagram of the first state of the filter component in Example 3.

[0042] Fig.12 It is a structural schematic diagram of the second state of the filter component in Example 3.

[0043] Fig.13 yes Fig. 9 Enlarged view of point E in the middle.

[0044] Fig.14 It is a schematic diagram of the internal structure of the filtering device in Example 3.

[0045] Description of the reference numerals: 1, box body; 11, box body; 111, clear liquid outlet; 112, debris outlet; 12, upper cover; 13, accommodating chamber; 131, clear liquid chamber; 132, debris chamber; 2, partition plate; 3, liquid inlet pipe; 31, liquid inlet; 4, filtering mechanism; 41, filter plate; 411, filtering hole; 412, first side; 413, second side; 414, guide roller; 42, rotating shaft; 43, spring; 44, first magnetic Part; 45, second magnetic part; 46, first flexible limit part; 47, second flexible limit part; 5, collecting mechanism; 51, retracting roller; 52, filter assembly; 521, collecting part; 5211, first filter cloth; 5212, second filter cloth; 5213, expansion part; 522, easy tear line; 523, first collecting part; 524, second collecting part; 6, intercepting mechanism; 61, support column; 7, self-sealing bearing; 8, impurities; 9, collecting plate. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1 -Attached Fig.14 This application is described in further detail.

[0047] Example 1 The present application embodiment discloses a filter device for filtering leachate. Figure 1 and Figure 2The filtering device of the present application is arranged between the leachate treatment system and the leachate spray-back system, and the filtering device is used to filter out impurities 8 in the leachate raw liquid, so that the leachate spray-back system can spray the leachate back into the incinerator for treatment. The leachate filtering device includes a box body 1, a partition plate 2, a liquid inlet pipe 3 and a filtering mechanism 4.

[0048] Reference Figure 1 and Figure 2 The box body 1 includes a box body 11 and an upper cover 12 that cover each other. The box body 11 is provided with a accommodating chamber 13. The partition plate 2 is fixed inside the box body 11. The partition plate 2 divides the accommodating chamber 13 into a clear liquid chamber 131 and a debris chamber 132. The box body 11 is provided with a clear liquid outlet 111 and a debris outlet 112. The clear liquid outlet 111 is connected to the clear liquid chamber 131; the debris outlet 112 is connected to the debris chamber 132. In this embodiment, the area of ​​the debris outlet 112 is larger than the area of ​​the clear liquid outlet 111. The leachate discharged through the clear liquid outlet 111 can be directly transported to the leachate back-spraying system, so that the leachate is back-sprayed into the incinerator. The leachate discharged through the debris outlet 112 contains more impurities 8 and needs to be treated secondary.

[0049] Reference Figures 2 to 5 The filter mechanism 4 includes a filter plate 41, a rotating shaft 42 and a fixing member.

[0050] Reference Figure 2 and Figure 3 The rotating shaft 42 is disposed above the partition plate 2, and the rotating shaft 42 and the partition plate 2 are located on the same vertical plane, and the rotating shaft 42 is rotatably connected to the box body 1. Figure 3 and Figure 5 In this embodiment, a fixing hole is provided inside the housing 1, and the self-sealing bearing 7 is installed in the fixing hole, and the rotating shaft 42 is connected to the self-sealing bearing 7 to realize the rotational connection between the rotating shaft 42 and the housing 1.

[0051] Reference Figure 2 and Figure 3, the filter plate 41 is fully provided with a plurality of filter holes 411, and the filter plate 41 is fixedly connected to the rotating shaft 42. Under normal conditions, the vertical projection surface of the filter plate 41 covers the accommodating chamber 13. Along the direction from the clear liquid chamber 131 to the debris chamber 132, the filter plate 41 includes a first side edge 412 and a second side edge 413 arranged opposite to each other, and the elevation of the first side edge 412 is greater than the elevation of the second side edge 413; that is, the filter plate 41 is arranged obliquely, and when the original leachate is on the filter plate 41, the original leachate flows from the clear liquid chamber 131 to the debris chamber 132. The distance from the rotating shaft 42 to the first side edge 412 is greater than the distance from the rotating shaft 42 to the second side edge 413; so that the area of ​​the filter plate 41 located above the clear liquid chamber 131 is greater than the area located above the debris chamber 132, so as to improve the filtering efficiency of the filter plate 41 on the original leachate.

[0052] Reference Figure 3 and Figure 5 The fixing member is disposed between the filter plate 41 and the inner peripheral wall of the box body 1, and the fixing member is used to force the second side edge 413 of the filter plate 41 to approach the inner peripheral wall of the box body 1. In this embodiment, the fixing member is a spring 43, one end of the spring 43 is fixedly connected to the filter plate 41, and the other end of the spring 43 is fixedly connected to the inner peripheral wall of the box body 1. Therefore, under the elastic force of the spring 43, the second side edge 413 of the filter plate 41 always has a tendency to abut against the box body 1.

[0053] Reference Figure 2 The liquid inlet pipe 3 is fixed in the accommodating chamber 13 of the box body 1, and the liquid inlet pipe 3 is arranged above the clear liquid chamber 131. The liquid inlet pipe 3 is provided with a plurality of liquid inlet ports 31, and the liquid inlet pipe 3 transports the permeate raw liquid into the accommodating chamber 13.

[0054] Reference Figure 2 and Figure 4 The permeate stock solution is filtered through the filter plate 41 into the clear liquid chamber 131, and the impurities 8 in the permeate stock solution are accumulated on the filter plate 41, and the impurities 8 are accumulated above the debris chamber 132; when the force exerted by the impurities 8 on the filter plate 41 is greater than the force exerted by the fixing part on the filter plate 41, the filter plate 41 rotates downward, so that the impurities 8 on the filter plate 41 fall into the debris chamber 132.

[0055] Reference Figure 2 and Figure 4 In this embodiment, the angle between the filter plate 41 and the vertical plane is 55°, and the angle between the outlet direction of the liquid inlet pipe 3 and the horizontal plane is 45°; thus, the leachate raw liquid flows on the filter plate 41, and the impurities 8 on the filter plate 41 can be washed to the filter plate 41 above the debris chamber 132.

[0056] The implementation principle of a leachate filtering device in the embodiment of the present application is: Reference Figure 4 and Figure 5 When the leachate stock solution falls onto the filter plate 41, the permeate stock solution will flow along the filter plate 41, and most of the leachate stock solution will fall into the clear liquid chamber 131; and the impurities 8 in the leachate stock solution will be retained on the filter plate 41, and the impurities 8 will accumulate on the filter plate 41 above the debris chamber 132 under the combined effect of the leachate stock solution and gravity.

[0057] Reference Figure 6 When the force exerted by the impurities 8 on the filter plate 41 is greater than the force exerted by the fixing member on the filter plate 41, the filter plate 41 rotates and tilts downward; the inclination angle of the filter plate 41 increases, and the distance between the second side edge 413 and the housing 1 increases, so that the impurities 8 on the filter plate 41 fall into the debris chamber 132. Subsequently, under the action of the spring 43, the filter plate 41 returns to its original tilted state to complete the process of collecting the impurities 8.

[0058] Reference Figure 4 The design length of the clear liquid chamber 131 is greater than the design length of the debris chamber 132, so that most of the leachate flows into the clear liquid chamber 131, reducing the flow of leachate into the debris chamber 132, thereby improving the filtering effect of the filtering device.

[0059] Reference Figure 4 and Figure 6 In the present technical solution, through the coordinated cooperation of the spring 43 and the filter plate 41, the filter plate 41 filters out the impurities 8 in the original leachate solution, and at the same time realizes the automatic collection of the impurities 8 on the filter plate 41; thereby reducing the failure rate of the leachate filtering device, facilitating the maintenance of the leachate filtering device, and improving the use efficiency of the leachate filtering device; and the impurities 8 on the filter plate 41 do not need to be manually unblocked or cleaned, thereby reducing labor input.

[0060] Example 2 The difference between this embodiment 2 and embodiment 1 is that: Reference Figure 7 and Figure 8 The fixing member includes a first magnetic member 44 and a second magnetic member 45 which are arranged opposite to each other. The first magnetic member 44 is fixed to the second side edge 413 of the filter plate 41, and the second magnetic member 45 is fixed to the inner wall of the box body 1. The first magnetic member 44 and the second magnetic member 45 are attracted to each other.

[0061] The filtering device also includes a first flexible limiter 46 and a second flexible limiter 47. The first flexible limiter 46 and the first magnetic member 44 are located on the same plane, and the first flexible limiter 46 is arranged on the side of the first magnetic member 44 close to the filter plate 41, and the first flexible limiter 46 abuts against the filter plate 41; the second flexible limiter 47 is fixedly connected to the inner circumferential wall of the box body 1, and the second flexible limiter 47 is arranged on the moving path of the filter plate 41 rotating downward, and the second flexible limiter 47 is used to limit the rotation of the filter plate 41.

[0062] The implementation principle of a leachate filtering device in the embodiment of the present application is: Reference Figure 7 and Figure 8 When the force of the impurities 8 on the filter plate 41 is greater than the suction force of the second magnetic member 45 on the first magnetic member 44, the filter plate 41 rotates downward, so that a channel for the impurities 8 to fall is provided between the second side edge 413 of the filter plate 41 and the box body 1. After the impurities 8 on the filter plate 41 fall into the debris chamber 132, the filter plate 41 abuts against the second flexible stopper 47, so that the filter plate 41 rotates toward the first flexible stopper 46. Under the action of the first magnetic member 44 and the second magnetic member 45, the filter plate 41 collides with the second flexible stopper 47 to shake the impurities 8 remaining on the filter plate 41, so as to facilitate the subsequent cleaning of the impurities 8.

[0063] Example 3 The difference between this embodiment 3 and embodiment 2 is that: Reference Figures 9 to 11 The filtering device also includes a collecting mechanism 5 and an intercepting mechanism 6.

[0064] The collecting mechanism 5 includes a container and a filter assembly 52. ​​The container is fixed on the inner peripheral wall of the box body 1, and is used to accommodate the filter assembly 52. ​​In this embodiment, the container is a retractable roller 51, the filter assembly 52 is a continuous sheet structure, and the collecting member 521 is rolled and arranged on the retractable roller 51. In other embodiments, the container can also be a collecting tank.

[0065] Reference Figures 9 to 11The filter assembly 52 includes a plurality of collecting members 521, which are connected in sequence. The collecting members 521 include a first filter mesh 5211, a second filter mesh 5212 and an expansion member 5213; when the first filter mesh 5211 is laid on the filter plate 41, the second filter mesh 5212 is arranged on the side of the first filter mesh 5211 away from the filter plate 41, and the second filter mesh 5212 and the first filter mesh 5211 are surrounded to form a receiving bag, and the bag opening of the receiving bag is arranged toward the first side 412 of the filter plate 41; the expansion member 5213 is arranged between the first filter mesh 5211 and the second filter mesh 5212, and the expansion member 5213 forces the second filter mesh 5212 to separate from the first filter mesh 5211, so that the bag opening of the receiving bag is opened, and the receiving bag is used to collect impurities 8.

[0066] Reference Fig.10 and Fig.11 , the first filter mesh 5211 and the second filter mesh 5212 are nylon meshes, and the first filter mesh 5211 and the second filter mesh 5212 can be connected by hot pressing. The meshes of the first filter mesh 5211 and the second filter mesh 5212 are smaller than the filter holes 411, so that the first filter mesh 5211 and the second filter mesh 5212 have a better filtering effect on impurities 8. The expansion member 5213 can be a compression deformation structure such as a V-shaped spring piece, a V-shaped foam member, etc. In this embodiment, the expansion member 5213 is a V-shaped foam member, and the expansion member 5213 is bonded and fixed to the first filter mesh 5211 and the second filter mesh 5212.

[0067] Reference Fig.12 When the collecting member 521 is wound around the outer periphery of the retracting roller 51, the first filter mesh 5211 and the second filter mesh 5212 compress the V-shaped foam member, so that the collecting member 521 is wound around the retracting roller 51. Fig.11 When the collecting member 521 is pulled onto the filter plate 41, the V-shaped foam member expands to separate the second filter mesh cloth 5212 from the first filter mesh cloth 5211, so that the bag opening of the containing bag is opened.

[0068] Reference Fig.11, a tear line 522 is provided between several collecting pieces 521, and two adjacent collecting pieces 521 are separated along the tear line 522. Therefore, when the filter assembly 52 is subjected to external force, the adjacent collecting pieces 521 can be separated to reduce the mutual interference between the collecting pieces 521, which is conducive to laying the collecting pieces 521 on the filter plate 41 and improving the collection effect of the collecting pieces 521 on the impurities 8. In this embodiment, the tear line 522 is provided between two adjacent first filter meshes 5211; hot pressing, stamping and other methods can be used to make a weak position of connection between adjacent first filter meshes 5211 to form the tear line 522. In this embodiment, the tear line 522 is formed between adjacent first filter meshes 5211 by hot pressing, and by controlling the temperature and time of hot pressing, the adjacent first filter meshes 5211 are in a weak bonding state.

[0069] Reference Fig.10 A guide roller 414 is also provided on the filter plate 41. The guide roller 414 is arranged on the first side edge 412 of the filter plate 41. A gap is provided between the guide roller 414 and the filter plate 41 for the collecting member 521 to pass through. The guide roller 414 guides the collecting member 521 to improve the fit between the collecting member 521 and the filter plate 41, thereby improving the collection effect of the collecting member 521 on the impurities 8.

[0070] Reference Fig. 9 and Fig.13 , along the conveying direction of the collecting pieces 521, the adjacent collecting pieces 521 are named first collecting pieces 523 and second collecting pieces 524 in sequence. When the force exerted by the impurities 8 on the filter plate 41 is greater than the force exerted by the fixing piece on the filter plate 41, the first collecting piece 523 passes through the gap between the filter plate 41 and the box body 1 and falls into the debris chamber 132, and the first collecting piece 523 pulls the second collecting piece 524 to be laid on the filter plate 41 again.

[0071] Reference Fig.13 When the first collecting piece 523 falls into the debris chamber 132, the second collecting piece 524 is laid on the filter plate 41, and the filter plate 41 returns to normal, the force of the impurities 8 on the first collecting piece 523 forces the first collecting piece 523 and the second collecting piece 524 to separate along the tear line 522.

[0072] Reference Fig.13In this embodiment, the interception mechanism 6 is fixed on the inner peripheral wall of the box body 1, and the interception mechanism 6 is arranged in the debris chamber 132, and the interception mechanism 6 is arranged on the moving path of the collecting member 521; the interception mechanism 6 includes a plurality of support columns 61, and the support columns 61 are arranged obliquely downward, and the length of the support columns 61 increases along the moving direction of the collecting member 521; when the first collecting member 523 is separated from the interception mechanism 6, the second collecting member 524 is laid on the filter plate 41. In this embodiment, the support columns 61 are flexible silicone columns.

[0073] The implementation principle of a leachate filtering device in the embodiment of the present application is: Reference Fig.10 and Fig.13 When enough impurities 8 are collected in the first collecting member 523, the impurities 8 exert a downward force on the filter plate 41, so that the second side edge 413 of the filter plate 41 is separated from the box body 1; thus, the first collecting member 523 passes through the channel between the second side edge 413 and the box body 1 and falls into the debris chamber 132. That is, the first collecting member 523 cleans the impurities 8 accumulated on the filter plate 41 into the debris chamber 132, reducing the impact of the impurities 8 on the filter device and improving the use efficiency of the filter device. And during the falling process, the first collecting member 523 pulls the second collecting member 524 onto the filter plate 41 to repeat the above impurity 8 cleaning process.

[0074] Reference Fig.10 and Fig.13 When the first collecting piece 523 falls, a plurality of support columns 61 exert an upward force on the first collecting piece 523, causing the first collecting piece 523 to slowly fall; during this process, the first collecting piece 523 slowly pulls the second collecting piece 524, and the first collecting piece 523 and the second collecting piece 524 remain connected, so that the second collecting piece 524 is laid on the filter plate 41.

[0075] Reference Fig.10 and Fig.13 , then, the filter plate 41 is reset under the action of the fixing member to reduce the distance between the second side 413 and the box body 1. After the first collecting member 523 is separated from the interception mechanism 6, the second collecting member 524 is laid on the second side 413 of the filter plate 41; at this time, the gap between the filter plate 41 and the box body 1 is smaller than the opening of the collection bag, that is, the filter plate 41 and the box body 1 have a limiting effect on the second collecting member 524; and after the first collecting member 523 is separated from the interception assembly, the force of the first collecting member 523 on the second collecting member 524 becomes larger, so that the first collecting member 523 and the second collecting member 524 are separated along the tear line 522. At this point, the first collecting member 523 is collected in the debris chamber 132, and the second collecting member 524 is laid on the filter plate 41 to repeat the above operation.

[0076] Example 4 The difference between this embodiment 4 and embodiment 3 is that: Reference Fig.14 In the debris chamber 132 of the box body 11, a collecting plate 9 with through holes can also be provided, and the collecting plate 9 is used to intercept and collect the collecting piece 521 with impurities. And the box body 11 is provided with a movable door to facilitate the staff to collect the collecting piece 521 with impurities on the collecting plate 9.

[0077] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A leachate filtering device, characterized in that: The invention comprises a box body (1), a partition plate (2), a liquid inlet pipe (3) and a filtering mechanism (4); the partition plate (2) is fixedly arranged inside the box body (1), and the partition plate (2) divides a containing chamber (13) of the box body (1) into a clear liquid chamber (131) and a debris chamber (132); the box body (1) is provided with a clear liquid outlet (111) and a debris outlet (112); the clear liquid outlet (111) is connected to the clear liquid chamber (131), and the debris outlet (112) is connected to the debris chamber (132); the filtering mechanism (4) comprises a filter (13) and a filter (13) configured to filter the clear liquid chamber (131). The invention comprises a filter plate (41), a rotating shaft (42) and a fixing member; the rotating shaft (42) is arranged above the partition plate (2), and the rotating shaft (42) and the partition plate (2) are located on the same vertical plane, and the rotating shaft (42) is rotatably connected to the box body (1); the filter plate (41) is fixedly connected to the rotating shaft (42), and the filter plate (41) is fully provided with a plurality of filter holes (411), and along the direction from the clear liquid chamber (131) to the debris chamber (132), the filter plate (41) comprises a first side edge (412) and a second side edge (411) arranged opposite to each other. a second side edge (413), the elevation of the first side edge (412) being greater than the elevation of the second side edge (413); in a normal state, the vertical projection surface of the filter plate (41) covers the accommodating chamber (13); the fixing member is arranged between the filter plate (41) and the inner peripheral wall of the box body (1), and the fixing member is used to force the second side edge (413) to be close to the inner peripheral wall of the box body (1); the liquid inlet pipe (3) is fixedly arranged in the accommodating chamber (13) of the box body (1), and the liquid inlet pipe (3) is arranged above the clear liquid chamber (131) The liquid inlet pipe (3) transports the raw permeate liquid into the containing chamber (13); the raw permeate liquid is filtered through the filter plate (41) into the clear liquid chamber (131), and the impurities (8) in the raw permeate liquid are deposited on the filter plate (41), and the impurities (8) are deposited above the debris chamber (132); when the force exerted by the impurities (8) on the filter plate (41) is greater than the force exerted by the fixing member on the filter plate (41), the filter plate (41) rotates downward, so that the impurities (8) on the filter plate (41) fall into the debris chamber (132).

2. The leachate filtering device according to claim 1, characterized in that: The distance from the rotation axis (42) to the first side edge (412) is greater than the distance from the rotation axis (42) to the second side edge (413).

3. The leachate filtering device according to claim 2, characterized in that: The fixing member comprises a first magnetic member (44) and a second magnetic member (45) which are arranged opposite to each other, the first magnetic member (44) being fixedly arranged on the second side edge (413) of the filter plate (41), the second magnetic member (45) being fixedly arranged on the inner peripheral wall of the box body (1), and the first magnetic member (44) and the second magnetic member (45) being attracted to each other; the filtering device further comprises a first flexible stopper (46) and a second flexible stopper (47), the first flexible stopper (46) and the first magnetic member (44) being located on the same plane, and the first flexible stopper (46) being arranged on a side of the first magnetic member (44) close to the filter plate (41), and the first flexible stopper (46) being in contact with the filter plate (41); the second flexible stopper (47) being fixedly connected to the inner peripheral wall of the box body (1), the second flexible stopper (47) being arranged on the moving path of the filter plate (41), and the second flexible stopper (47) being used to limit the rotation of the filter plate (41).

4. The leachate filtering device according to claim 1, characterized in that: The housing (5) further comprises a collecting mechanism (5), the collecting mechanism (5) comprising a container and a filter assembly (52), the container being fixedly mounted on the inner peripheral wall of the housing (1), the container being used to accommodate the filter assembly (52); the filter assembly (52) comprising a plurality of collecting members (521), the plurality of collecting members (521) being connected in sequence; the collecting member (521) comprising a first filter mesh cloth (5211), a second filter mesh cloth (5212) and an expansion member (5213); when the first filter mesh cloth (5211) is laid on the filter plate (41), the first filter mesh cloth (5211) is arranged on a side of the second filter mesh cloth (5212) away from the filter plate (41), the second filter mesh cloth (5212) and the first filter mesh cloth (5211) are arranged to form a container bag, and the bag opening of the container bag is arranged towards the first side edge (412) of the filter plate (41); the expansion member (5213) The expansion member (5213) is arranged between the first filter mesh cloth (5211) and the second filter mesh cloth (5212), and forces the second filter mesh cloth (5212) to separate from the first filter mesh cloth (5211), so that the bag mouth of the containing bag is opened, and the containing bag is used to collect impurities (8); along the conveying direction of the collecting member (521), adjacent collecting members (521) are named as the first collecting member (523) and the second collecting member (524) in sequence, and the first collecting member (523) is laid on the filter plate (41); when the force of the impurities (8) on the filter plate (41) is greater than the force of the fixing member on the filter plate (41), the first collecting member (523) passes through the gap between the filter plate (41) and the box body (1) and falls into the debris chamber (132), and the first collecting member (523) pulls the second collecting member (524) to be laid on the filter plate (41).

5. The leachate filtering device according to claim 4, characterized in that: The filter plate (41) is further provided with a guide roller (414), the guide roller (414) being arranged on a first side edge (412) of the filter plate (41), and a gap for a collecting member (521) to pass through is provided between the guide roller (414) and the filter plate (41).

6. The leachate filtering device according to claim 4, characterized in that: A tear line (522) is provided between the plurality of collecting pieces (521), and two adjacent collecting pieces (521) are separated along the tear line (522); when the first collecting piece (523) falls into the debris chamber (132), the second collecting piece (524) is laid on the filter plate (41), and the filter plate (41) returns to normal, the force exerted by the impurities (8) on the first collecting piece (523) forces the first collecting piece (523) and the second collecting piece (524) to separate along the tear line (522).

7. The leachate filtering device according to claim 6, characterized in that: The invention also comprises an interception mechanism (6), the interception mechanism (6) being fixedly mounted on the inner wall of the box body (1), the interception mechanism (6) being arranged in the debris chamber (132), and the interception mechanism (6) being arranged on the moving path of the collecting member (521); the interception mechanism (6) comprising a plurality of support columns (61), the support columns (61) being arranged tilted downward, and the length of the support columns (61) increasing along the moving direction of the collecting member (521); when the first collecting member (523) is separated from the interception mechanism (6), the second collecting member (524) is laid on the filter plate (41).

8. The leachate filtering device according to claim 1, characterized in that: The fixing member is a spring (43), one end of the spring (43) is fixedly connected to the filter plate (41), and the other end of the spring (43) is fixedly connected to the inner peripheral wall of the box body (1).

9. The leachate filtering device according to claim 1, characterized in that: The angle between the filter plate (41) and the vertical plane is 55°.

10. The leachate filtering device according to claim 1, characterized in that: The angle between the liquid outlet direction of the liquid inlet pipe (3) and the horizontal plane is 45°.

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