A filtering device for leachate

Abstract

This application relates to the technical field of wastewater treatment, and particularly to a filtration device for leachate, which includes a box body, a partition plate, a liquid inlet pipe, and a filtration mechanism; the partition plate is fixedly arranged inside the box body, and the partition plate divides the accommodation chamber of the box body into a clear liquid chamber and a debris chamber; the filtration mechanism includes a filter plate, a rotating shaft, and a fixing member; the rotating shaft is arranged above the partition plate, and the rotating shaft is rotatably connected to the box body; the filter plate is fixedly connected to the rotating shaft; the fixing member is arranged between the filter plate and the inner peripheral wall of the box body, and the fixing member is used to force the filter plate to approach the inner peripheral wall of the box body; the liquid inlet pipe is fixedly arranged in the accommodation chamber of the box body, and the liquid inlet pipe is arranged above the clear liquid chamber, and the liquid inlet pipe conveys the original leachate into the accommodation chamber. In this application, through the coordinated cooperation of the fixing member and the filter plate, while the filter plate filters out the impurities in the original leachate, the automatic collection of the impurities on the filter plate is realized, and the use efficiency of the filtration device for leachate is improved.

Description

Technical Field

[0001] This 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 will generate waste leachate, which mainly comes from the waste pit and is the water seeping out of the waste in the waste pit. The leachate of waste incineration power plants is a kind of high-concentration organic wastewater that is difficult to treat, and the leachate contains a large amount of pollutants such as organic matter, ammonia nitrogen, and heavy metals; if the leachate is directly discharged, it will cause serious pollution to the soil, water body and atmosphere.

[0003] In the prior art, the leachate can be treated by incineration. That is, the leachate in the waste pit is preliminarily filtered by the waste cushion layer and collected into the foundation pit through the leachate corridor. Subsequently, the leachate is transported to the leachate treatment system and the leachate recirculation spraying system by the discharge pump. The leachate treatment system further treats the leachate, and the leachate recirculation spraying system sprays the leachate back into the incinerator, thereby incinerating the leachate.

[0004] After the leachate is treated by the leachate treatment system, there are still impurities in the leachate, which will affect the leachate recirculation spraying 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 recirculation spraying system to filter the impurities in the leachate. However, impurities are easily accumulated on the filter plate in the filter, causing the filter to malfunction or break down, 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 influence of impurity accumulation on the filtering device, this application provides a filtering device for leachate.

[0006] A filtering device for leachate provided by this application adopts the following technical solutions:

[0007] A filtering device for leachate, comprising a box body, a partition plate, a liquid inlet pipe and a filtering mechanism; an accommodation chamber is provided inside the box body, the partition plate is fixedly arranged inside the box body, and the partition plate divides the accommodation 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 communicated with the clear liquid chamber, and the debris outlet is communicated with the debris chamber; the filtering mechanism includes 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 on the same vertical plane, and the rotating shaft is rotatably connected with the box body; the filter plate is fixedly connected with the rotating shaft, and a plurality of filtering holes are formed in the entire filter plate. Along the direction from the clear liquid chamber to the debris chamber, the filter plate includes a first side and a second side arranged opposite to each other, and the elevation of the first side is higher than that of the second side; under normal conditions, the vertical projection surface of the filter plate covers the accommodation 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 approach the inner wall of the box body; the liquid inlet pipe is fixedly arranged in the accommodation chamber of the box body, and the liquid inlet pipe is arranged above the clear liquid chamber, and the liquid inlet pipe conveys the original leachate into the accommodation chamber; the original leachate is filtered by the filter plate into the clear liquid chamber, and the impurities in the original leachate accumulate on the filter plate, and the impurities accumulate 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.

[0008] By adopting the above technical solution, after the original leachate drops onto the filter plate, the original leachate will flow along the filter plate, and most of the original leachate will drop into the clear liquid chamber; while the impurities in the original leachate will be intercepted on the filter plate, and under the combined action of the original leachate and gravity, the impurities will accumulate on the filter plate above the debris chamber.

[0009] 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 and inclines; the inclination angle of the filter plate is relatively 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 inclined state to complete the process of impurity collection.

[0010] In this technical solution, through the coordinated cooperation of the fixing member and the filter plate, while the filter plate filters out the impurities in the original leachate, the automatic collection of the impurities on the filter plate is realized; thereby reducing the failure rate of the filtering device for leachate, facilitating the maintenance of the filtering device for leachate, and improving the use efficiency of the filtering device for leachate; and the impurities on the filter plate do not need to be manually blocked or cleaned, reducing the labor input.

[0011] Optionally, the distance from the rotating shaft to the first side is greater than the distance from the rotating shaft to the second side.

[0012] By adopting the above technical solution, the distance from the rotating shaft to the first side is greater than the distance from the rotating shaft to the second side; that is, the designed length of the clear liquid chamber is greater than the designed length of the debris chamber, so that most of the original leachate flows into the clear liquid chamber, reducing the inflow of the original leachate into the debris chamber, thereby improving the filtering effect of the filtering device.

[0013] Optionally, the fixing member includes a first magnetic member and a second magnetic member which are oppositely arranged. The first magnetic member is fixed on the second side of the filter plate, and the second magnetic member is fixed on the inner wall of the box body. The first magnetic member and the second magnetic member attract each other; the filtering device further includes a first flexible limiting member and a second flexible limiting member. The first flexible limiting member and the first magnetic member are in the same plane, and the first flexible limiting member is arranged on the side of the first magnetic member close to the filter plate and abuts against the filter plate; the second flexible limiting member is fixedly connected to the inner wall of the box body, and the second flexible limiting member is arranged on the moving path of the filter plate and is used to limit the rotation of the filter plate.

[0014] By adopting the above technical solution, when the force exerted by 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 impurities to fall is provided between the second side of the filter plate and the box body. When the impurities on the filter plate fall into the debris chamber, the filter plate abuts against the second flexible limiting member, so that the filter plate rotates towards the first flexible limiting member. Under the action of the first magnetic member and the second magnetic member, the filter plate collides with the second flexible limiting member to shake the impurities remaining on the filter plate, facilitating the subsequent cleaning of the impurities.

[0015] Optionally, it further includes a collection mechanism, which includes a housing and a filtering component. The housing is fixedly arranged on the inner wall of the box body and is used to accommodate the filtering component. The filtering component includes a number of collection pieces, and several of the collection pieces are connected in sequence. The collection piece includes a first filter cloth, a second filter cloth and an expansion piece. When the first filter cloth is laid on the filter plate, the first filter cloth is arranged on the side of the second filter cloth away from the filter plate. The second filter cloth and the first filter cloth enclose a containing bag, and the opening of the containing bag is arranged towards the first side edge of the filter plate. The expansion piece is arranged between the first filter cloth and the second filter cloth, and the expansion piece forces the second filter cloth to be separated from the first filter cloth, so that the opening of the containing bag is opened. The containing bag is used to collect impurities. Along the conveying direction of the collection piece, the adjacent collection pieces are sequentially named the first collection piece and the second collection piece, and the first collection piece is laid on the filter plate. When the acting force of the impurities on the filter plate is greater than the acting force of the fixing piece on the filter plate, the first collection piece penetrates through the gap between the filter plate and the box body and drops into the debris chamber, and the first collection piece pulls the second collection piece to be laid on the filter plate.

[0016] By adopting the above technical solution, the first filter cloth of the collection piece is laid on the filter plate to improve the filtering effect of impurities in the leachate. At the same time, the filter bag formed by enclosing the first filter cloth and the second filter cloth will collect most of the impurities.

[0017] When enough impurities are collected in the first collection piece, the impurities have a downward acting force on the filter plate, so that the second side edge of the filter plate is separated from the box body. Thus, the first collection piece penetrates through the channel between the second side edge and the box body and drops into the debris chamber. That is, the first collection piece clears the impurities accumulated on the filter plate into the debris chamber, reduces the influence of the impurities on the filtering device, and improves the use efficiency of the filtering device. And during the dropping process of the first collection piece, the second collection piece is pulled onto the filter plate to repeat the above impurity cleaning process.

[0018] Optionally, a guiding roller is further arranged on the filter plate. The guiding roller is arranged on the first side edge of the filter plate, and there is a gap for the collection piece to pass through between the guiding roller and the filter plate.

[0019] By adopting the above technical solution, by arranging the guiding roller on the filter plate, it plays a guiding role for the collection piece, so as to improve the fitting degree between the collection piece and the filter plate and improve the collection effect of the collection piece on impurities.

[0020] Optionally, a tear line is provided between several collecting members, and two adjacent collecting members are separated along the tear line; when the first collecting member drops into the debris chamber, the second collecting member is laid on the filter plate, and when the filter plate returns to its normal state, the force exerted by the impurities on the first collecting member forces the first collecting member and the second collecting member to separate along the tear line.

[0021] By adopting the above technical solution, the adjacent collecting members are separated by the tear line to reduce the mutual interference between the collecting members, which is beneficial to laying the collecting members on the filter plate and improving the collection effect of the collecting members on impurities.

[0022] Optionally, it further includes an intercepting mechanism, which is fixedly arranged on the inner peripheral wall of the box body, and the intercepting mechanism is arranged in the debris chamber and on the moving path of the collecting member; the intercepting mechanism includes several support columns, the support columns are arranged obliquely downward, and along the moving direction of the collecting member, the length of the support columns increases; the first collecting member is separated from the intercepting mechanism, and the second collecting member is laid on the second side edge of the filter plate.

[0023] By adopting the above technical solution, when the first collecting member drops, several support columns have an upward force on the first collecting member, making the first collecting member fall slowly; during this process, the first collecting member pulls the second collecting member, making the second collecting member laid on the filter plate.

[0024] Subsequently, the filter plate is reset under the action of the fixing member to reduce the distance between the second side edge and the box body. When the first collecting member is separated from the intercepting mechanism, the second collecting member is laid on the second side edge of the filter plate; at this time, the gap between the filter plate and the box body is smaller than the opened collecting bag, that is, the filter plate and the box body have a limiting effect on the second collecting member; after the first collecting member is separated from the intercepting component, the force exerted by the first collecting member on the second collecting member becomes larger, so that the first collecting member and the second collecting member are separated. Thus, the first collecting member is collected into the debris chamber, and the second collecting member is laid on the filter plate to repeat the above operation.

[0025] 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.

[0026] By adopting the above technical solution, the automatic reset of the filter plate is realized through the elastic force of the spring.

[0027] Optionally, the included angle between the filter plate and the vertical plane is 55°.

[0028] By adopting the above technical solution, the filter plate is inclined at 55°, so that when the original leachate flows on the filter plate, the impurities on the filter plate are washed to the filter plate above the debris chamber.

[0029] Optionally, the angle between the liquid outlet direction of the liquid inlet pipe and the horizontal plane is 45°.

[0030] By adopting the above technical solution, when the original leachate is washed onto the filter plate, the original leachate can wash the impurities on the filter plate to above the debris chamber.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. Through the cooperative cooperation of the fixing member and the filter plate, while the filter plate filters out the impurities in the original leachate, the automatic collection of the impurities on the filter plate is realized, and the use efficiency of the leachate filtering device is improved;

[0033] 2. When enough impurities are collected in the first collection member, the impurities have a downward acting force on the filter plate, so that the second side of the filter plate is separated from the box body; thus, the first collection member passes through the channel between the second side and the box body and falls into the debris chamber. That is, the first collection member clears the impurities accumulated on the filter plate into the debris chamber, reduces the influence of the impurities on the filtering device, and improves the use efficiency of the filtering device. And during the falling process of the first collection member, the second collection member is pulled onto the filter plate to repeat the above impurity cleaning process;

[0034] 3. The adjacent collection members are separated by the tearable line to reduce the mutual interference between the collection members, which is beneficial to laying the collection members on the filter plate and improving the collection effect of the collection members on the impurities. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the filtering device in Embodiment 1.

[0036] Figure 2 is a schematic internal structural diagram of the filtering device in Embodiment 1.

[0037] Figure 3 is Figure 2 an enlarged view of A in

[0038] Figure 4 is a schematic structural diagram of the first state of the filtering mechanism in Embodiment 1.

[0039] Figure 5 is Figure 4 an enlarged view of B in

[0040] Figure 6 is a schematic structural diagram of the second state of the filtering mechanism in Embodiment 1.

[0041] Figure 7 It is a schematic structural diagram of the first state of the filtering mechanism in Embodiment 2.

[0042] Figure 8 It is Figure 7 An enlarged view of part C in

[0043] Figure 9 It is a schematic internal structure diagram of the filtering device in Embodiment 3.

[0044] Figure 10 It is Figure 9 An enlarged view of part D in

[0045] Figure 11 It is a schematic structural diagram of the first state of the filtering component in Embodiment 3.

[0046] Figure 12 It is a schematic structural diagram of the second state of the filtering component in Embodiment 3.

[0047] Figure 13 It is Figure 9 An enlarged view of part E in

[0048] Figure 14 It is a schematic internal structure diagram of the filtering device in Embodiment 3.

[0049] Description of reference numerals: 1. Box body; 11. Box body main body; 111. Clear liquid outlet; 112. Debris outlet; 12. Upper cover; 13. Accommodating chamber; 131. Clear liquid chamber; 132. Debris chamber; 2. Partition board; 3. Liquid inlet pipe; 31. Liquid inlet; 4. Filtering mechanism; 41. Filtering plate; 411. Filtering holes; 412. First side edge; 413. Second side edge; 414. Guide roller; 42. Rotating shaft; 43. Spring; 44. First magnetic member; 45. Second magnetic member; 46. First flexible limiting member; 47. Second flexible limiting member; 5. Collection mechanism; 51. Rewinding roller; 52. Filtering component; 521. Collection member; 5211. First filter mesh; 5212. Second filter mesh; 5213. Expansion member; 522. Easy tear line; 523. First collection member; 524. Second collection member; 6. Interception mechanism; 61. Support column; 7. Self-sealing bearing; 8. Impurities; 9. Collection plate. Detailed implementation manners

[0050] The following further describes the present application in detail with reference to Figure 1 -14.

[0051] An embodiment of the present application discloses a filtering device for leachate. Refer to Figure 1 and Figure 2, the filtration device of the present application is arranged between the leachate treatment system and the leachate re-spraying system. The filtration device is used to filter out impurities 8 in the raw leachate, so that the leachate re-spraying system can re-spray the leachate into the incinerator for treatment. The filtration device of the leachate includes a box body 1, a partition plate 2, a liquid inlet pipe 3 and a filtration mechanism 4.

[0052] Referring to Figure 1 and Figure 2 , the box body 1 includes a box body main body 11 and an upper cover 12 that are covered with each other. The box body main body 11 is provided with an accommodation chamber 13. The partition plate 2 is fixedly arranged inside the box body main body 11. The partition plate 2 divides the accommodation chamber 13 into a clear liquid chamber 131 and a sundry chamber 132. The box body main body 11 is provided with a clear liquid outlet 111 and a sundry outlet 112. The clear liquid outlet 111 is communicated with the clear liquid chamber 131; the sundry outlet 112 is communicated with the sundry chamber 132. In this embodiment, the area of the sundry 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 re-spraying system, so as to re-spray the leachate into the incinerator. The leachate discharged through the sundry outlet 112 contains more impurities 8 and needs secondary treatment.

[0053] Referring to Figures 2 to 5 , the filtration mechanism 4 includes a filter plate 41, a rotating shaft 42 and a fixing member.

[0054] Referring to Figure 2 and Figure 3 , the rotating shaft 42 is arranged above the partition plate 2, and the rotating shaft 42 and the partition plate 2 are located in the same vertical plane. The rotating shaft 42 is rotatably connected to the box body 1. Referring to Figure 3 and Figure 5 , in this embodiment, fixing holes are provided inside the box body 1, and a self-sealing bearing 7 is installed in the fixing holes. The rotating shaft 42 is connected to the self-sealing bearing 7 to realize the rotational connection between the rotating shaft 42 and the box body 1.

[0055] Referring to Figure 2 and Figure 3, the filter plate 41 is fully opened with a number of filter holes 411, and the filter plate 41 is fixedly connected to the rotating shaft 42. Under normal conditions, the vertical projection plane of the filter plate 41 covers the accommodation chamber 13. Along the direction from the clear liquid chamber 131 to the debris chamber 132, the filter plate 41 includes a first side 412 and a second side 413 which are oppositely arranged, and the elevation of the first side 412 is higher than that of the second side 413; that is, the filter plate 41 is inclined. When the original leachate is on the filter plate 41, the original leachate flows along the direction from the clear liquid chamber 131 to the debris chamber 132. The distance from the rotating shaft 42 to the first side 412 is greater than the distance from the rotating shaft 42 to the second side 413; so that the area of the filter plate 41 above the clear liquid chamber 131 is larger than the area above the debris chamber 132, in order to improve the filtration efficiency of the filter plate 41 for the original leachate.

[0056] Refer to Figure 3 and Figure 5 , 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 413 of the filter plate 41 to be close to 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. Thus, under the elastic force of the spring 43, the second side 413 of the filter plate 41 always has a tendency to abut against the box body 1.

[0057] Refer to Figure 2 , the liquid inlet pipe 3 is fixedly arranged in the accommodation 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 number of liquid inlet openings 31, and the liquid inlet pipe 3 conveys the original leachate into the accommodation chamber 13.

[0058] Refer to Figure 2 and Figure 4 , the original leachate is filtered by the filter plate 41 into the clear liquid chamber 131, and the impurities 8 in the original leachate accumulate on the filter plate 41, and the impurities 8 accumulate above the debris chamber 132; when the acting force of the impurities 8 on the filter plate 41 is greater than the acting force of 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.

[0059] Refer to Figure 2 and Figure 4 , in this embodiment, the included angle between the filter plate 41 and the vertical plane is 55°, and the included angle between the liquid outlet direction of the liquid inlet pipe 3 and the horizontal plane is 45°; thus, when the original leachate flows on the filter plate 41, the impurities 8 on the filter plate 41 can be washed to the filter plate 41 above the debris chamber 132.

[0060] The implementation principle of the leachate filtering device in the embodiment of the present application is as follows:

[0061] Reference Figure 4 and Figure 5 When the original leachate drops onto the filter plate 41, the original leachate will flow along the filter plate 41, and most of the original leachate will drop into the supernatant chamber 131; while the impurities 8 in the original leachate will be intercepted on the filter plate 41, and under the combined action of the original leachate and gravity, the impurities 8 will accumulate on the filter plate 41 above the debris chamber 132.

[0062] Reference Figure 6 When the acting force of the impurities 8 on the filter plate 41 is greater than the acting force of the fixing member on the filter plate 41, the filter plate 41 rotates downward and tilts; the tilt angle of the filter plate 41 becomes larger, and the distance between the second side 413 and the box body 1 becomes larger, so that the impurities 8 on the filter plate 41 drop 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.

[0063] Reference Figure 4 Since the designed length of the supernatant chamber 131 is greater than the designed length of the debris chamber 132, most of the original leachate flows into the supernatant chamber 131, reducing the inflow of the original leachate into the debris chamber 132, so as to improve the filtering effect of the filtering device.

[0064] Reference Figure 4 and Figure 6 In this technical solution, through the coordinated cooperation of the spring 43 and the filter plate 41, while the filter plate 41 filters out the impurities 8 in the original leachate, automatic collection of the impurities 8 on the filter plate 41 is realized; 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 blocked or cleaned manually, reducing the labor input.

[0065] Embodiment 2

[0066] The difference between this Embodiment 2 and Embodiment 1 is that:

[0067] Reference Figure 7 and Figure 8 The fixing member includes a first magnetic member 44 and a second magnetic member 45 which are oppositely arranged. The first magnetic member 44 is fixed on the second side 413 of the filter plate 41, and the second magnetic member 45 is fixed on the inner peripheral wall of the box body 1. The first magnetic member 44 and the second magnetic member 45 attract each other.

[0068] The filtering device further includes a first flexible limiting member 46 and a second flexible limiting member 47. The first flexible limiting member 46 and the first magnetic member 44 are located on the same plane, and the first flexible limiting member 46 is disposed on the side of the first magnetic member 44 close to the filter plate 41, and the first flexible limiting member 46 abuts against the filter plate 41; the second flexible limiting member 47 is fixedly connected to the inner peripheral wall of the box body 1, and the second flexible limiting member 47 is disposed on the moving path of the downward rotation of the filter plate 41, and the second flexible limiting member 47 is used to limit the rotation of the filter plate 41.

[0069] The implementation principle of a leachate filtering device according to an embodiment of the present application is as follows:

[0070] Referring to Figure 7 and Figure 8 , when the acting force of the impurity 8 on the filter plate 41 is greater than the suction force of the second magnetic member 45 on the first magnetic member 44, when the filter plate 41 rotates downward, a channel for the impurity 8 to fall is provided between the second side 413 of the filter plate 41 and the box body 1. When the impurity 8 on the filter plate 41 falls into the debris chamber 132, the filter plate 41 abuts against the second flexible limiting member 47, so that the filter plate 41 rotates towards the first flexible limiting member 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 limiting member 47 to shake the residual impurities 8 on the filter plate 41, so as to facilitate the subsequent cleaning of the impurities 8.

[0071] Embodiment 3

[0072] The difference between this Embodiment 3 and Embodiment 2 is that:

[0073] Referring to Figures 9 to 11 , the filtering device further includes a collection mechanism 5 and an interception mechanism 6.

[0074] The collection mechanism 5 includes a receiving member and a filtering component 52. The receiving member is fixedly provided on the inner peripheral wall of the box body 1, and the receiving member is used to receive the filtering component 52. In this embodiment, the receiving member is a winding roller 51, the filtering component 52 is a continuous sheet structure, and the collecting member 521 is wound on the winding roller 51. In other embodiments, the receiving member may also be a collecting trough.

[0075] Referring to 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.

[0076] Reference Figure 10 and Figure 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.

[0077] Reference Figure 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. Figure 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.

[0078] Reference Figure 11, there is a tear line 522 between several collecting pieces 521, and two adjacent collecting pieces 521 are separated along the tear line 522. Thus, when the filtering component 52 is subjected to an external force, the adjacent collecting pieces 521 can be separated from each other to reduce the mutual interference between the collecting pieces 521, which is beneficial 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 arranged between two adjacent first filter meshes 5211; hot pressing, stamping or other methods can be used to make there be a weak connection position between two adjacent first filter meshes 5211 to form the tear line 522. In this embodiment, the tear line 522 is formed between two adjacent first filter meshes 5211 by hot pressing, and by controlling the temperature and time of hot pressing, the two adjacent first filter meshes 5211 are in a weakly bonded state.

[0079] Referring to Figure 10 , a guide roller 414 is further arranged on the filter plate 41. The guide roller 414 is arranged on the first side 412 of the filter plate 41, and there is a gap for the collecting piece 521 to pass through between the guide roller 414 and the filter plate 41; the guide roller 414 plays a guiding role on the collecting piece 521 to improve the fitting degree between the collecting piece 521 and the filter plate 41 and improve the collection effect of the collecting piece 521 on the impurities 8.

[0080] Referring to Figure 9 and Figure 13 , along the conveying direction of the collecting piece 521, two adjacent collecting pieces 521 are sequentially named as the first collecting piece 523 and the second collecting piece 524. When the acting force of the impurities 8 on the filter plate 41 is greater than the acting force of 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 drops into the debris chamber 132, and the first collecting piece 523 pulls the second collecting piece 524 to be re-laid on the filter plate 41.

[0081] Referring to Figure 13 , when the first collecting piece 523 drops into the debris chamber 132, the second collecting piece 524 is laid on the filter plate 41, and when the filter plate 41 returns to its normal state, the acting force of the impurities 8 on the first collecting piece 523 forces the first collecting piece 523 and the second collecting piece 524 to be separated along the tear line 522.

[0082] Referring to Figure 13, in this embodiment, the interception mechanism 6 is fixedly arranged on the inner peripheral wall of the box body 1, and the interception mechanism 6 is arranged in the sundry chamber 132 and on the moving path of the collecting member 521; the interception mechanism 6 includes a plurality of support columns 61 which are arranged obliquely downward, and along the moving direction of the collecting member 521, the length of the support column 61 increases; 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 column 61 is a flexible silica gel column.

[0083] The implementation principle of a leachate filtering device according to an embodiment of the present application is as follows:

[0084] Referring to Figure 10 and Figure 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, causing the second side 413 of the filter plate 41 to be separated from the box body 1; thus, the first collecting member 523 passes through the channel between the second side 413 and the box body 1 and falls into the sundry chamber 132. That is, the first collecting member 523 clears the impurities 8 accumulated on the filter plate 41 into the sundry chamber 132, reducing the influence of the impurities 8 on the filtering device and improving the use efficiency of the filtering device. And during the falling process of the first collecting member 523, the second collecting member 524 is pulled onto the filter plate 41 to repeat the above-mentioned impurity 8 cleaning process.

[0085] Referring to Figure 10 and Figure 13 , when the first collecting member 523 has fallen, a plurality of support columns 61 exert an upward force on the first collecting member 523, causing the first collecting member 523 to fall slowly; during this process, the first collecting member 523 slowly pulls the second collecting member 524, and the first collecting member 523 and the second collecting member 524 remain connected, so that the second collecting member 524 is laid on the filter plate 41.

[0086] Referring to Figure 10 and Figure 13 , subsequently, 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. When 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 open collecting 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 acting 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. Thus, the first collecting member 523 is collected into the sundry chamber 132, and the second collecting member 524 is laid on the filter plate 41 to repeat the above operation.

[0087] Example 4

[0088] The difference between this Example 4 and Example 3 lies in that:

[0089] Referring to Figure 14 , in the sundry chamber 132 of the box body 11, a collecting plate 9 with through holes can also be provided. The collecting plate 9 is used to intercept and collect the collecting member 521 with impurities. And an activity door is provided on the box body 11 to facilitate the staff to collect the collecting member 521 with impurities on the collecting plate 9.

[0090] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this 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 the 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 filtering plate (41), a rotating shaft (42) and a fixing member; the rotating shaft (42) is arranged on the partition plate (2). 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). 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 (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); in a normal state, the vertical projection surface of the filter plate (41) covers the accommodating chamber (13); the fixing member is arranged on the side of the filter plate (41) to prevent the filter plate (41) from leaking. The fixing member is used to force the second side edge (413) to approach the inner wall of the box (1) between the filter plate (41) and the inner wall of the box (1); the liquid inlet pipe (3) is fixedly arranged in the accommodating chamber (13) of the box (1), and the liquid inlet pipe (3) is arranged above the clear liquid chamber (131), and the liquid inlet pipe (3) transports the original leachate into the accommodating chamber (13); the original leachate is filtered through the filter plate (41) into the clear liquid chamber (131), and the impurities (8) in the original leachate are deposited on the filter plate (41), and the impurities (8) are deposited above the debris chamber (132); when the impurities (8) act on the filter plate (41), the impurities (8) are deposited on the impurities (8) above the debris chamber (132); The filter plate (41) is rotated downwards by a force greater than the force exerted by the fixing member on the filter plate (41), so that the impurities (8) on the filter plate (41) fall into the debris chamber (132); further comprising a collecting mechanism (5), the collecting mechanism (5) comprising a receiving member and a filter assembly (52), the receiving member being fixedly arranged on the inner peripheral wall of the box body (1), the receiving member being used to receive 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 the side of the second filter mesh cloth (5212) away from the filter plate (41), and the second filter mesh cloth (5212) and the first filter mesh cloth (5211) are surrounded by a receiving bag, and the bag opening of the receiving bag is arranged toward the first side edge (412) of the filter plate (41); the expansion member (5213) is arranged between the first filter mesh cloth (5211) and the second filter mesh cloth (5212), and the expansion member (5213) forces the second filter mesh cloth (5212) to separate from the first filter mesh cloth (5211), so that The bag mouth of the receiving bag is opened, and the receiving bag is used to collect impurities (8); along the conveying direction of the collecting piece (521), adjacent collecting pieces (521) are named as the first collecting piece (523) and the second collecting piece (524) in sequence, and the first collecting piece (523) is laid on the filter plate (41); 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). ; 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 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).

5. The leachate filtering device according to claim 1, 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).

6. The leachate filtering device according to claim 5, 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).

7. 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).

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

9. 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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