A landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device

Abstract

The invention discloses a device for integrating nanofiltration membrane and reverse osmosis treatment of landfill leachate, and relates to the technical field of membrane filtration system. The technical scheme mainly comprises a component support base and a corresponding lifting bracket; a nanofiltration membrane filtration module is arranged on the upper surface of the lifting bracket on one side; a reverse osmosis membrane filtration module is arranged on the upper surface of the lifting bracket on the other side, and a corresponding connecting conduit is arranged between the nanofiltration membrane filtration module and the reverse osmosis membrane filtration module. An integrated membrane filtration system is formed by combining the nanofiltration membrane filtration module and the reverse osmosis membrane filtration module in a front-to-rear manner. In the process of treating landfill leachate, not only the efficiency and quality of treating the landfill leachate can be improved, but also the pressure requirement at one end of the reverse osmosis membrane can be reduced. The corresponding cleaning reagent is injected into the cleaning reagent storage box arranged on the filter modules on both sides, and can be injected into the inside of the filter module during the cleaning process for auxiliary cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of membrane filtration systems, and more specifically to a garbage leachate nanofiltration membrane and reverse osmosis integrated treatment device. Background Art

[0002] Leachate is a high-concentration, difficult-to-degrade wastewater generated by rainwater leaching, surface and groundwater immersion, and the biochemical reaction of the garbage itself during garbage disposal. Due to its high BOD5, COD, metal and ammonia nitrogen content, and large fluctuations in water quality and quantity, it is necessary to introduce a membrane product treatment system into the existing treatment process. The existing membrane filtration system technology generally includes three main processes: pretreatment, biochemical treatment, and deep treatment. Among them, nanofiltration (NF) and reverse osmosis (RO) technologies are highly favored due to their excellent separation performance.

[0003] Among them, nanofiltration membrane is a selective semipermeable membrane, which is mainly used to remove divalent ions and small molecular organic matter in water, while reverse osmosis membrane is a semipermeable membrane with extremely high selectivity, which is mainly used to remove almost all soluble solids, organic matter, bacteria and viruses in water. Although the two are similar in structure, their design and performance are different. Therefore, in the membrane filtration system, the nanofiltration membrane and the reverse osmosis structure are usually not integrated. This not only increases the overall processing cost, but also affects its economy. However, the corresponding landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device with a public notification number of CN214031961U solves this problem well. It combines the nanofiltration tube with the reverse osmosis tube in the component, and uses the dual filtration performance to purify and adsorb harmful components in the landfill leachate, thereby forming an integrated process treatment equipment.

[0004] However, the leachate contains water with a high concentration of soluble calcium and magnesium compounds, namely the so-called hard water. When the hard water passes through the nanofiltration membrane or the reverse osmosis membrane, the concentration of calcium and magnesium ions in the water will gradually increase due to the retention effect of the membrane. Under certain conditions, these ions will react with the carbonate ions in the water to form insoluble precipitates such as calcium carbonate or magnesium carbonate. These precipitates will adhere to the membrane surface, which will not only hinder the flow of water through the membrane layer, resulting in a decrease in membrane flux, but also increase water flow resistance due to scaling, thereby increasing the pressure difference on both sides of the membrane and affecting its stable use. The nanofiltration membrane and reverse osmosis integrated treatment device in the above-mentioned technology do not have the ability to effectively deal with its scaling layer, resulting in more and more scaling sites on the membrane layer of the treatment device, thereby blocking the membrane pores and reducing the effective filtration area of ​​the nanofiltration membrane and reverse osmosis membrane. Summary of the invention

[0005] In view of the shortcomings of the above-mentioned technologies, the purpose of the present invention is to provide a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device, comprising a component support base, wherein both sides of the upper surface of the component support base are fixedly installed with lifting brackets; and a nanofiltration membrane filtration module is arranged on the upper surface of one lifting bracket; and a reverse osmosis membrane filtration module is arranged on the upper surface of the other lifting bracket, and a communicating conduit is arranged between the nanofiltration membrane filtration module and the reverse osmosis membrane filtration module, and a cleaning reagent storage box is arranged at the upper side of the nanofiltration membrane filtration module and the reverse osmosis membrane filtration module;

[0008] The nanofiltration membrane filtration module is provided with a nanofiltration membrane filtration assembly and a first central tube, and the reverse osmosis membrane filtration module is provided with a reverse osmosis membrane filtration assembly and a second central tube; an inner filter element cleaning mechanism is provided at the outer sides of the first central tube and the second central tube; an outer filter element cleaning mechanism is provided at the outer sides of the nanofiltration membrane filtration assembly and the reverse osmosis membrane filtration assembly;

[0009] Among them, the outer filter element cleaning mechanism includes a second circular ring frame and an auxiliary circular ring frame, and the inner wall side of the auxiliary circular ring frame is fixedly installed with a brushing circular plate for cleaning scale. The spray end of the cleaning reagent storage box extends to the outside of the two brushing circular plates for spraying scale dissolving liquid for auxiliary cleaning.

[0010] As a further solution of the present invention: the nanofiltration membrane filtration module includes a first filter shell, and the reverse osmosis membrane filtration module includes a second filter shell, the second filter shell has the same shell structure as the first filter shell; both are provided with an extrusion cavity, a filtration cavity, and a driving cavity from top to bottom; and a sleeve cover mechanism is arranged on one side of the opposite sides of the two shells, a nanofiltration membrane filtration component is inserted and installed in the filtration cavity of the first filter shell, a reverse osmosis membrane filtration component is inserted and installed in the filtration cavity of the second filter shell, a first center tube is fixedly installed at the center of the nanofiltration membrane filtration component in the interior of the first filter shell, and a second center tube is fixedly installed at the center of the reverse osmosis membrane filtration component in the interior of the second filter shell.

[0011] As a further solution of the present invention: the sleeve cover plate mechanism includes a cover plate with a mouth, and the opening reserved on the surface of the cover plate with a mouth coincides with the axis of the extrusion cavity, the filter cavity and the drive cavity on the corresponding shell side; a reciprocating threaded rod is movably installed at the internal axis position of the drive cavity; and the reciprocating threaded rods in the drive cavities on both sides pass outward through the openings on the surface of the cover plate with a mouth; and external support rods are fixedly connected to the two passing ends, and a second gear sleeve is fixedly connected at the middle position on the surface of the external support rod; a servo motor with an output end corresponding to the second gear sleeve above and below is fixedly installed at the middle position of the upper surface of the component support base, and the output end of the servo motor is meshingly installed with a second crawler meshing with the outer side of the second gear sleeve.

[0012] As a further solution of the present invention: the second circular ring frame as a whole is a circular plate structure of two pieces separated from each other; and the inner wall sides of the two circular ring plates are fixedly connected with a supporting skeleton plate every 90 degrees, and the auxiliary circular ring frame is movably installed at the positions on both sides of the inner wall of the second circular ring frame; and a fourth gear sleeve is fixedly installed on the outer edge surface of the auxiliary circular ring frame, and a column rod is movably installed at the middle position of the upper surface of the supporting skeleton plate at the bottom of the second circular ring frame, and a bevel gear corresponding to the fourth gear sleeves on both sides is fixedly installed on the upper side of the column rod, and a gear piece is fixedly installed on the lower side of the column rod, and a sleeve frame is movably installed at the bottom center position of the gear piece, and the sleeve frame is meshed with the reciprocating threaded rod in the driving cavity, and the gear piece is placed in the driving cavity as a whole; and a toothed side plate meshing with the side surface of the gear piece is fixedly installed on one side of the driving cavity.

[0013] As a further solution of the present invention: second ducts are fixedly installed on the support frame plates at the left and right positions and the upper position of the inner wall of the second circular ring frame; and the bottom of each second duct is fixedly connected to an outward-expanding spray pipe, and the outward-expanding spray pipe as a whole is in the shape of two branch pipes that are inclined outward to align with the auxiliary circular ring frame, and a number of reserved openings that are connected to the inner wall end brushing circular ring plate are sequentially opened on the outer circular surface of the second circular ring frame. A third duct that is connected to the second duct on each side is fixedly installed on the outer circular surface of the second circular ring frame.

[0014] As a further solution of the present invention: a cavity cylindrical sleeve is fixedly connected to the middle position on the upper side of the second circular ring frame, a folding airbag tube is fixedly installed at the position of the extrusion cavity on the inner side surface of the cover plate with a mouth, the cavity cylindrical sleeve is open towards the side where the folding airbag tube is provided, and a fourth conduit connected to the third conduit is fixedly installed on the side surface of the unopened end of the cavity cylindrical sleeve; and a threaded conduit connected to the fourth conduit is fixedly connected in each cavity cylindrical sleeve, and the outer side of the threaded conduit is connected to the folding airbag tube, and a first conduit is fixedly connected to the bottom output end of the cleaning reagent storage box, and the first conduit is connected to the folding airbag tube on the corresponding side.

[0015] As a further solution of the present invention: a limited circular ring sleeve is fixedly connected to the inner wall of the circular opening corresponding to the axis of the filter cavity reserved on the surface of the cover plate with opening, second circular ring fitting grooves are opened on both sides of the connecting conduit, and double circular ring frames are movably sleeved on the outer sides of the second circular ring fitting grooves, and the circular ring of the double circular ring frame close to the side of the cover plate with opening is fixedly installed with a first circular ring fitting groove that movably fits with the limited circular ring sleeve, and the circular ring of the double circular ring frame away from the side of the cover plate with opening is fixedly installed with a first gear sleeve, and third gear sleeves are fixedly installed at positions directly below the first gear sleeve on both sides of the external support rod, and the third gear sleeves on both sides of the external support rod are meshed with the first gear sleeve and sleeved with a first crawler.

[0016] As a further solution of the present invention: the inner filter element cleaning mechanism includes a first circular ring frame fixedly connected to a first circular ring fitting groove and extending from an end face of one side in the filter cavity, and the first circular ring frame is in the shape of a hollow bracket as a whole; and is sleeved on the outer sides of the first center tube and the second center tube on the corresponding sides, and a double-head scraper is fixedly installed on the first circular ring frame.

[0017] As a further solution of the present invention: the outer scraper end of the double-headed scraper is fitted with the inner circle of the nanofiltration membrane filtration component and the reverse osmosis membrane filtration component, and the inner scraper end of the double-headed scraper is fitted with the outer circular surface of the first central tube and the second central tube.

[0018] As a further solution of the present invention: corresponding waterproof sealing rings are arranged on the movable fitting ends of the limiting circular ring sleeve, the first circular ring fitting notch, and the second circular ring fitting notch.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. An integrated membrane filtration system is formed by combining the nanofiltration membrane filtration module and the reverse osmosis membrane filtration module in a front-and-rear manner. In the process of treating landfill leachate, it can not only improve the efficiency and quality of treating landfill leachate, but also reduce the pressure demand at one end of the reverse osmosis membrane, reduce the risk of contamination of the reverse osmosis membrane, and reduce its cleaning frequency and maintenance cost. In addition, the cleaning reagent storage boxes configured on the filter modules on both sides are injected with corresponding cleaning reagents, which can be injected into the interior of the filter module during the cleaning process for auxiliary cleaning, thereby further improving its cleaning quality.

[0021] 2. Through the rotation of the reciprocating threaded rod at the output end of the servo motor, the meshing outer filter element cleaning mechanisms on both sides can be driven to reciprocate along the driving cavity, so as to cooperate with the brushing circular plates on both sides of the inner wall of the second circular ring frame to be attached to the outer surface of the nanofiltration membrane filtration component and the reverse osmosis membrane filtration component for brushing, effectively removing the scaling layer on the membrane surface, reducing the resistance of the membrane surface, thereby improving the flux of the membrane, and the membranes of the two groups of filtration modules can work under the action of a single driving force, reducing maintenance downtime and reducing the complexity of maintenance work.

[0022] 3. By setting the toothed side plate in the driving cavity, the gear plate can be rotated during the overall reciprocating motion of the outer filter element cleaning mechanism, so that the conical gear drives the auxiliary circular ring frames meshing on the front and rear sides to rotate clockwise and counterclockwise respectively, so that the brushing circular ring plates on both sides form a twisting and brushing force, further enhancing the cleaning effect of the cleaning end, so that it can handle stubborn scaling layers.

[0023] 4. The outer filter element cleaning mechanism reciprocates along the driving cavity, so that the cavity cylinder sleeve on the second circular ring frame reciprocates to squeeze the folding air bag tube set in the extrusion cavity. In the process of folding and rebounding of the folding air bag tube, a negative pressure cavity is formed, and the cleaning reagent in the cleaning reagent storage box is transported to the outward expansion spray pipe through the corresponding conduit, so that the cleaning reagent is evenly applied to the scrubbing end of the scrubbing circular ring plate. Not only does it not need to manually inject the cleaning reagent, but it can also further improve the cleaning effect of the cleaning end.

[0024] 5. By setting the third gear sleeve on both sides of the external support rod and utilizing the meshing driving effect of the first crawler, during the process of the outer filter element cleaning mechanism cleaning the membrane layer, the first circular ring frame of the inner filter element cleaning mechanism can also be driven to clean one end of the water production network outside the central tube. Without configuring additional driving components, the double-headed scrapers fitted on both sides can be used to synchronously scrape and clean the stains on the central tube, thereby further improving the cleaning effect of the cleaning end. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the working state structure of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0027] Figure 2 It is a front view of an integrated treatment device for landfill leachate nanofiltration membrane and reverse osmosis;

[0028] Figure 3 It is a structural schematic diagram of a nanofiltration membrane filtration module of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0029] Figure 4 It is a schematic structural diagram of a half-section view of a first filter housing of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0030] Figure 5 It is a schematic structural diagram of a half-section view of a second filter housing of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0031] Figure 6 It is a schematic diagram of the disassembly effect of the sleeve cover plate mechanism of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0032] Figure 7 It is a schematic diagram of the splitting effect of a double-ring frame of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0033] Figure 8 It is a partial structural schematic diagram of a filter element cleaning mechanism in a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0034] Fig. 9 It is a structural schematic diagram of an external filter element cleaning mechanism of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0035] Fig.10 It is a structural schematic diagram of the bottom of the outer filter element cleaning mechanism of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device;

[0036] Fig.11 The present invention is a partial structural schematic diagram of the tooth side plate of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device.

[0037] Reference numerals:

[0038] 1. Component support base; 2. Lifting bracket;

[0039] 3. Nanofiltration membrane filtration module; 31. First filtration housing; 32. filtration cavity; 33. Nanofiltration membrane filtration assembly; 34. First central tube; 35. Extrusion cavity; 36. Drive cavity;

[0040] 37. Cover plate mechanism; 371. Cover plate with opening; 372. Position-limiting circular ring; 373. Double circular ring frame; 374. First circular ring fitting notch; 375. First gear sleeve; 376. Second circular ring fitting notch;

[0041] 38, reciprocating threaded rod; 39, external support rod; 310, second gear sleeve; 311, folding airbag tube; 312, third gear sleeve;

[0042] 313, inner filter element cleaning mechanism; 3131, first circular ring frame; 3132, double-head scraper;

[0043] 314, tooth side plate; 315, first crawler track;

[0044] 4. Reverse osmosis membrane filtration module; 41. Second filtration housing; 42. Second central tube; 43. Reverse osmosis membrane filtration assembly;

[0045] 5. connecting conduit; 6. servo motor; 7. second crawler; 8. cleaning reagent storage box; 9. first conduit;

[0046] 10. External filter element cleaning mechanism; 101. Second circular ring frame; 102. Support frame plate; 103. Auxiliary circular ring frame; 104. Fourth gear sleeve; 105. Scrubbing circular ring plate; 106. Reserved opening; 107. Column rod; 108. Conical gear; 109. Gear sheet; 1010. Sleeve mouth frame; 1011. Second conduit; 1012. Outward expansion spray pipe; 1013. Third conduit; 1014. Cavity cylinder sleeve; 1015. Fourth conduit; 1016. Threaded conduit. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0048] Reference Figures 1 to 11 An embodiment of a landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device of the present invention is further described.

[0049] A landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device, comprising a component support base 1, wherein both sides of the upper surface of the component support base 1 are fixedly mounted with lifting brackets 2; and a nanofiltration membrane filtration module 3 is disposed on the upper surface of the lifting bracket 2 on one side; and a reverse osmosis membrane filtration module 4 is disposed on the upper surface of the lifting bracket 2 on the other side, and a communicating conduit 5 is disposed between the nanofiltration membrane filtration module 3 and the reverse osmosis membrane filtration module 4, and a cleaning agent storage box 8 is disposed at the upper side of the nanofiltration membrane filtration module 3 and the reverse osmosis membrane filtration module 4;

[0050] The nanofiltration membrane filtration module 3 is provided with a nanofiltration membrane filtration component 33 and a first central tube 34, and the reverse osmosis membrane filtration module 4 is provided with a reverse osmosis membrane filtration component 43 and a second central tube 42; an inner filter element cleaning mechanism 313 is provided at the outer side of the first central tube 34 and the second central tube 42; an outer filter element cleaning mechanism 10 is provided at the outer side of the nanofiltration membrane filtration component 33 and the reverse osmosis membrane filtration component 43;

[0051] Among them, the outer filter element cleaning mechanism 10 includes a second circular frame 101 and an auxiliary circular frame 103, and the inner wall side of the auxiliary circular frame 103 is fixedly installed with a brushing circular plate 105 for cleaning scale, and the spray end of the cleaning reagent storage box 8 extends to the outside of the two brushing circular plates 105 for spraying scale dissolving liquid for auxiliary cleaning.

[0052] In view of the fact that the nanofiltration membrane and reverse osmosis integrated treatment device in the prior art does not have the ability to effectively treat its scaling layer, resulting in more and more scaling sites on the membrane layer of the treatment device, thereby blocking the membrane pores and reducing the effective filtration area of ​​the nanofiltration membrane and the reverse osmosis membrane, the problem is now solved by adopting the above-mentioned technical scheme, which is mainly composed of a component support base 1, a lifting bracket 2, a nanofiltration membrane filtration module 3, a reverse osmosis membrane filtration module 4, a connecting conduit 5 and a corresponding cleaning reagent storage box 8. The component support base 1 and the lifting bracket 2 are used as supporting components of the device, and mainly play a supporting role to stably support the nanofiltration membrane filtration module 3 and the reverse osmosis membrane filtration module 4 on both sides. The garbage leachate to be purified enters from one side of the nanofiltration membrane filtration module 3, and after being filtered by the nanofiltration membrane filtration component 33 and the first central tube 34, it enters the reverse osmosis membrane filtration module 4 through the connecting conduit 5, and then is filtered and discharged through the reverse osmosis membrane filtration component 43 and the second central tube 42. Since the garbage leachate is A high-concentration, difficult-to-degrade hard wastewater, which is mainly permanent hard wastewater composed of salts that are not easy to decompose, such as calcium sulfate and calcium chloride, and also includes temporary hard wastewater composed of some calcium bicarbonate and magnesium bicarbonate. Therefore, the corresponding diluted hydrochloric acid or citric acid or other acidic solutions can be injected into the washing reagent storage box 8 separately configured on the upper side of the nanofiltration membrane filtration module 3 and the reverse osmosis membrane filtration module 4 for cleaning to dissolve the carbonate scale, and in the process of reciprocating cleaning of the outer filter element cleaning mechanism 10, due to the effect of its contact friction, a certain amount of heat will be generated at the scrubbing end. The heat source formed by this part can heat and decompose the temporary hard wastewater into calcium carbonate and magnesium carbonate to form a precipitate, which is then washed away with the acidic solution such as hydrochloric acid or citric acid to solve the problem that the nanofiltration membrane and reverse osmosis integrated treatment device in the prior art do not have the ability to effectively treat its scaling layer, resulting in more and more scaling sites on the membrane layer of the treatment device, thereby blocking the membrane pores and reducing the effective filtration area of ​​the nanofiltration membrane and the reverse osmosis membrane.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the nanofiltration membrane filtration module 3 includes a first filter housing 31, and the reverse osmosis membrane filtration module 4 includes a second filter housing 41. The second filter housing 41 has the same housing structure as the first filter housing 31; both are provided with an extrusion cavity 35, a filter cavity 32, and a drive cavity 36 in sequence from top to bottom; and a sleeve cover mechanism 37 is disposed on one side of the opposite side of the two housings, a nanofiltration membrane filtration component 33 is inserted and installed in the filter cavity 32 of the first filter housing 31, and a reverse osmosis membrane filtration component 43 is inserted and installed in the filter cavity 32 of the second filter housing 41, a first central tube 34 is fixedly installed at the center of the nanofiltration membrane filtration component 33 in the interior of the first filter housing 31, and a second central tube 42 is fixedly installed at the center of the reverse osmosis membrane filtration component 43 in the interior of the second filter housing 41;

[0054] Among them, the configured nanofiltration membrane filtration component 33 and reverse osmosis membrane filtration component 43 are both membrane filtration components in the prior art, both of which include a membrane layer and a central tube in the center. After adsorption by the porous material composed of the polymer film on the membrane layer, the water can be purified through the water production layer located inside the membrane component and close to the central tube and introduced into the central tube. This belongs to the existing membrane filtration technology. Because in the actual working process, the membrane layer is responsible for intercepting soluble solids, organic matter, etc. in the water, especially in hard water, calcium, magnesium and other ions are easy to form precipitation on the surface of the membrane layer, resulting in the most serious scaling phenomenon. The main function of the corresponding water production network on the central tube is to collect water that has passed through the membrane filtration. Since the water production network is inside the membrane component, the water flow reaches the water production network after being filtered through the membrane layer. Therefore, the scaling phenomenon on the water production network is relatively less, so the treatment end is divided into The inner filter element cleaning mechanism 313 and the outer filter element cleaning mechanism 10 are configured with the same structure of the first filter housing 31 and the second filter housing 41. The difference is that the filter membrane cores configured therein are different. The opening on the side of the first filter housing 31 is a circular opening, so that the entering garbage leachate only enters its filter cavity 32, and the first central tube 34 and the second central tube 42 are connected by the connecting conduit 5. Therefore, the purification path of the garbage leachate is specifically as follows: entering from the nanofiltration membrane filtration module 3, first to the filter cavity 32 of the first filter housing 31, and then entering the first central tube 34 after initial filtration by the nanofiltration membrane filtration component 33 in the first filter housing 31, and then entering the second central tube 42 in the reverse osmosis membrane filtration module 4 through the first central tube 34 and the connecting conduit 5, and then filtered and discharged through the second central tube 42 and the reverse osmosis membrane filtration component 43.

[0055] like Figure 1 , Figure 2, Figure 3 , Figure 6 As shown, the sleeve cover mechanism 37 includes a cover plate 371 with a mouth, and the reserved opening on the surface of the cover plate 371 with a mouth coincides with the axis of the extrusion cavity 35, the filter cavity 32, and the drive cavity 36 on the corresponding shell side. A reciprocating threaded rod 38 is movably installed at the internal axis position of the drive cavity 36; and the reciprocating threaded rods 38 in the drive cavities 36 on both sides pass outward through the openings on the surface of the cover plate 371 with a mouth; and an external support rod 39 is fixedly connected to the two passing ends, and a second gear sleeve 310 is fixedly connected at the middle position on the surface of the external support rod 39, and a servo motor 6 with an output end corresponding to the second gear sleeve 310 above and below is fixedly installed at the middle position on the upper surface of the component support base 1, and the output end of the servo motor 6 is meshingly installed with a second crawler 7 meshing with the outer side of the second gear sleeve 310.

[0056] The reciprocating threaded rod 38 and the external support rod 39 are integrally formed into an integrated structure, and are movably sleeved on the first filter housing 31 and the second filter housing 41 , and corresponding waterproof sealing rings are arranged on the sleeve ends to ensure the sealing of the sleeve ends.

[0057] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 As shown, the second annular frame 101 as a whole is a structure of two annular plates separated from each other; and a supporting frame plate 102 is fixedly connected to the inner wall side of the two annular plates every 90 degrees, and the auxiliary annular frame 103 is movably installed at the positions on both sides of the inner wall of the second annular frame 101; and a fourth gear sleeve 104 is fixedly installed on the outer edge surface of the auxiliary annular frame 103, and a column 107 is movably installed at the middle position of the upper surface of the supporting frame plate 102 at the bottom of the second annular frame 101, and the column 107 A bevel gear 108 is fixedly installed on the upper side and meshes with the fourth gear sleeve 104 on both sides. A gear piece 109 is fixedly installed on the lower side of the column rod 107. A sleeve frame 1010 is movably installed at the bottom center position of the gear piece 109. The sleeve frame 1010 meshes with the reciprocating threaded rod 38 in the driving cavity 36. The gear piece 109 is placed in the driving cavity 36 as a whole; and a toothed side plate 314 meshing with the side of the gear piece 109 is fixedly installed on one side of the driving cavity 36.

[0058] like Figure 2 , Fig. 9 , Fig.10 , Fig.11As shown, second conduits 1011 are fixedly installed on the supporting skeleton plates 102 at the left and right positions and the upper position of the inner wall of the second circular ring frame 101; and the bottom of each second conduit 1011 is fixedly connected to an outward-expanding spray pipe 1012, and the outward-expanding spray pipe 1012 is generally in the shape of two branch pipes that are tilted outward to align with the auxiliary circular ring frame 103, and a plurality of reserved openings 106 that are communicated with the inner wall end brushing circular ring plate 105 are sequentially opened on the outer circular surface of the second circular ring frame 101. A third conduit 1013 that is communicated with the second conduit 1011 on each side is fixedly installed on the outer circular surface of the second circular ring frame 101.

[0059] The configured scrubbing annular plate 105 is a flexible rubber scrubbing end, and the reserved opening 106 is provided to allow the cleaning agent sprayed from the outwardly expanded spray pipe 1012 to flow into the scrubbing end of the scrubbing annular plate 105;

[0060] The specific cleaning process is as follows: before the cleaning process, clean water is injected from the liquid inlet end of the first filter housing 31, and then the servo motor 6 is turned on, and the second crawler 7 meshed on the output end of the servo motor 6 drives the second gear sleeve 310 to rotate, so that the reciprocating threaded rods 38 on both sides of the external support rod 39 rotate, and the sleeve frame 1010 meshed on the reciprocating threaded rod 38 in the driving cavity 36 is controlled to drive the second annular frame 101 to reciprocate along the driving cavity 36. Since the sleeve frame 1010 is movably mounted with a gear piece 109, one side of the side wall of the driving cavity 36 has a toothed side plate 314 meshed with the gear piece 109. Therefore, during the reciprocating movement of the second annular frame 101, The gear piece 109 will also rotate, and the gear piece 109, the bevel gear 108, and the column rod 107 are an integral structure, so the bevel gear 108 will also rotate synchronously, thereby driving the fourth gear sleeves 104 on both sides of the bevel gear 108 to rotate. Since the fourth gear sleeves 104 are movably arranged on both sides, one fourth gear sleeve 104 will rotate counterclockwise, and the fourth gear sleeve 104 on the other side will rotate clockwise. The brushing annular plate 105 on the inner wall of the fourth gear sleeve 104 fits with the outer surface of the nanofiltration membrane filtration component 33 and the reverse osmosis membrane filtration component 43, so a forward and reverse rotating twisting and brushing force can be formed on the outside of the membrane layer to effectively remove the stubborn scaling layer on the outside.

[0061] like Figure 2 , Fig. 9 , Fig.10 , Fig.11As shown, a cavity cylindrical sleeve 1014 is fixedly connected to the middle position on the upper side of the second circular ring frame 101, and a folding airbag tube 311 is fixedly installed on the inner side surface of the cover plate 371 with a mouth at the position of the extrusion cavity 35. The cavity cylindrical sleeve 1014 is open toward the side where the folding airbag tube 311 is provided, and a fourth conduit 1015 communicated with the third conduit 1013 is fixedly installed on the side surface of the unopened end of the cavity cylindrical sleeve 1014; and a threaded conduit 1016 communicated with the fourth conduit 1015 is fixedly connected to each cavity cylindrical sleeve 1014, and the outer side of the threaded conduit 1016 is communicated with the folding airbag tube 311, and the first conduit 9 is fixedly connected to the bottom output end of the cleaning reagent storage box 8, and the first conduit 9 is communicated with the folding airbag tube 311 on the corresponding side.

[0062] The specific feeding process of the configured folding airbag tube 311 is as follows: during the reciprocating motion of the outer filter element cleaning mechanism 10, the cavity cylindrical sleeve 1014 on the upper side of the second circular ring frame 101 will synchronously move in the extrusion cavity 35. When the cavity cylindrical sleeve 1014 moves to the innermost side of the extrusion cavity 35, since the side of the cavity cylindrical sleeve 1014 facing the folding airbag tube 311 is open, when the cavity cylindrical sleeve 1014 gradually approaches one side of the folding airbag tube 311, the outer edge of the cavity cylindrical sleeve 1014 will squeeze the folding airbag tube 311, so that the reagent in the folding airbag tube 311 is squeezed out through one end of the threaded conduit 1016, and then enters the third conduit 1013 through the fourth conduit 1015. Finally, the reagent is outputted through the third conduit 1013 to the second conduit 1011 on each side, and is sprayed out by the outward-expanding spray pipe 1012. The outward-expanding spray pipe 1012 is similar to an outer eight-shaped structure as a whole, and can be aligned with the surface of the auxiliary circular ring frame 103 for spraying, so that the reagent is evenly attached to the auxiliary circular ring frame 103. The auxiliary circular ring frame 103 is provided with a reserved opening 106 that communicates with the scrubbing circular ring plate 105, so that the reagent can be evenly and stably transported to the scrubbing end. In addition, since the second circular ring frame 101 and the upper cavity cylinder sleeve 1014 are both fitted in the corresponding filtering cavity 32 and the extrusion cavity 35, during the driving process of the gear plate 109, its structure can also move stably without deviation.

[0063] In order to ensure the stability of negative pressure adsorption, the first catheter 9 and the threaded catheter 1016 arranged on both sides of the folding airbag tube 311 need to be separately equipped with a one-way valve inside the catheter joint, so that only the reagent enters one end of the folding airbag tube 311 through the first catheter 9, while the outer threaded catheter 1016 only discharges the reagent.

[0064] like Figure 6 , Figure 7 , Fig.10 , Fig.11As shown, a limited circular ring sleeve 372 is fixedly connected to the inner wall of the circular opening corresponding to the axis of the filter cavity 32 reserved on the surface of the opening cover plate 371, and a second circular ring fitting notch 376 is opened on both sides of the connecting conduit 5, and a double circular ring frame 373 is movably sleeved on the outer side of the second circular ring fitting notch 376, and a first circular ring fitting notch 374 movably sleeved with the limited circular ring sleeve 372 is fixedly installed on the circular ring of the double circular ring frame 373 close to the side of the opening cover plate 371, and a first gear sleeve 375 is fixedly installed on the circular ring of the double circular ring frame 373 away from the side of the opening cover plate 371, and a third gear sleeve 312 is fixedly installed at a position directly below the first gear sleeve 375 on both sides of the external support rod 39, and the third gear sleeve 312 on both sides of the external support rod 39 is meshed with the first gear sleeve 375 and sleeved with a first crawler 315.

[0065] like Figure 6 , Figure 7 , Fig.10 , Fig.11 As shown, the inner filter element cleaning mechanism 313 includes a first circular frame 3131 fixedly connected to the first circular ring fitting groove 374 and extending on one side end face of the filter cavity 32. The first circular frame 3131 is in the shape of a hollow bracket as a whole; and is sleeved on the outer sides of the first center tube 34 and the second center tube 42 on the corresponding sides. A double-head scraper 3132 is fixedly installed on the first circular frame 3131.

[0066] like Figure 6 , Figure 7 , Fig.10 , Fig.11 As shown, the outer scraper end of the double-headed scraper 3132 fits with the inner circle of the nanofiltration membrane filtration component 33 and the reverse osmosis membrane filtration component 43, and the inner scraper end of the double-headed scraper 3132 fits with the outer circular surface of the first center tube 34 and the second center tube 42.

[0067] like Figure 6 , Figure 7 , Fig.10 , Fig.11 As shown, corresponding waterproof sealing rings are arranged on the movable fitting ends of the limiting circular ring sleeve 372 , the first circular ring fitting notch 374 , and the second circular ring fitting notch 376 .

[0068] The specific working process of the inner filter element cleaning mechanism 313 disposed on the first central tube 34 and the second central tube 42 is as follows: when the second crawler 7 at the output end of the servo motor 6 drives the external support rod 39 to rotate, the third gear sleeves 312 on both sides of the external support rod 39 will control the first gear sleeves 375 on both sides of the connecting conduit 5 to rotate under the driving action of the first crawler 315, thereby causing the double-ring sleeve 373 to rotate synchronously, and the double-ring sleeve 373 will rotate through the first ring frame 3131 in the filter cavity 32 that is movably clamped by the limiting ring sleeve 372, so as to utilize The double-headed scraper 3132 arranged on the first circular frame 3131 performs 360-degree rotating scraping. Since one side of the double-headed scraper 3132 is in contact with the inner circle of the nanofiltration membrane filtration component 33 and the reverse osmosis membrane filtration component 43, and the other side is in contact with the first center tube 34 and the second center tube 42, the filtration surfaces on both sides can be cleaned at one time during its rotation, and no additional drive configuration is required to work, so that the outer filter element cleaning mechanism 10 can be cleaned while the inside is cleaned with chemical reagents, and the cleaning reagents of the previous stage can also be used to further improve the fault tolerance and stability of the cleaning end.

[0069] Cleaning process: First, the reciprocating threaded rod 38 configured in the nanofiltration membrane filtration module 3 and the reverse osmosis membrane filtration module 4 is controlled to rotate through the driving action of the servo motor 6, so that the outer filter element cleaning mechanism sleeved on the outside of the nanofiltration membrane filtration component 33 and the reverse osmosis membrane filtration component 43; 10 reciprocates along the driving cavity 36. During the reciprocating movement, the meshing driving relationship between the toothed side plate 314 and the gear plate 109 is coordinated so that the brushing annular plates 105 on both sides can be scrubbed forward and backward, and when each side moves to the side of the extrusion cavity 35 equipped with a folded air bag tube 311, the cleaning agent can be transported to the outward expansion spray pipe 1012 end by the effect of negative pressure adsorption, so that the cleaning agent can be stably output without manual control and can also act evenly on the scrubbing end, further ensuring the cleaning effect of its scaling layer.

[0070] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A landfill leachate nanofiltration membrane and reverse osmosis integrated treatment device, comprising a component support base (1), characterized in that: Lifting brackets (2) are fixedly mounted on both sides of the upper surface of the component support base (1); and a nanofiltration membrane filtration module (3) is arranged on the upper surface of one lifting bracket (2); and a reverse osmosis membrane filtration module (4) is arranged on the upper surface of the other lifting bracket (2); a communicating conduit (5) is arranged between the nanofiltration membrane filtration module (3) and the reverse osmosis membrane filtration module (4); and a cleaning reagent storage box (8) is arranged at the upper side of the nanofiltration membrane filtration module (3) and the reverse osmosis membrane filtration module (4); The nanofiltration membrane filtration module (3) is provided with a nanofiltration membrane filtration assembly (33) and a first central tube (34), and the reverse osmosis membrane filtration module (4) is provided with a reverse osmosis membrane filtration assembly (43) and a second central tube (42); an inner filter element cleaning mechanism (313) is provided at an outer position of the first central tube (34) and the second central tube (42); and an outer filter element cleaning mechanism (10) is provided at an outer position of the nanofiltration membrane filtration assembly (33) and the reverse osmosis membrane filtration assembly (43); The outer filter element cleaning mechanism (10) comprises a second annular frame (101) and an auxiliary annular frame (103), the inner wall side of the auxiliary annular frame (103) is fixedly mounted with a scrubbing annular plate (105) for cleaning scale, and the spray end of the cleaning reagent storage box (8) extends outside the two scrubbing annular plates (105) for spraying a scale dissolving liquid for auxiliary cleaning; The nanofiltration membrane filtration module (3) comprises a first filtration housing (31), and the reverse osmosis membrane filtration module (4) comprises a second filtration housing (41). The second filtration housing (41) has the same housing structure as the first filtration housing (31); both are provided with an extrusion cavity (35), a filtration cavity (32), and a drive cavity (36) in order from top to bottom; and a sleeve cover mechanism (37) is disposed on one side of the two housings on opposite sides; a nanofiltration membrane filtration assembly (33) is inserted and installed in the filtration cavity (32) of the first filtration housing (31), and a reverse osmosis membrane filtration assembly (43) is inserted and installed in the filtration cavity (32) of the second filtration housing (41); a first central tube (34) is fixedly installed inside the first filtration housing (31) at the center of the nanofiltration membrane filtration assembly (33), and a second central tube (42) is fixedly installed inside the second filtration housing (41) at the center of the reverse osmosis membrane filtration assembly (43); The sleeve cover plate mechanism (37) comprises a cover plate with an opening (371), the opening reserved on the surface of the cover plate with an opening (371) coincides with the axis of the extrusion cavity (35), the filter cavity (32), and the drive cavity (36) on the corresponding shell side, and a reciprocating threaded rod (38) is movably installed at the internal axis position of the drive cavity (36); and the reciprocating threaded rods (38) in the drive cavities (36) on both sides pass outward through the openings on the surface of the cover plate with an opening (371); and external support rods (39) are fixedly connected to the two passing ends, and a second gear sleeve (310) is fixedly connected to the middle position on the surface of the external support rod (39); a servo motor (6) whose output end corresponds to the second gear sleeve (310) at the top and bottom is fixedly installed at the middle position on the upper surface of the component support base (1), and a second crawler (7) meshing with the outer side of the second gear sleeve (310) is meshedly installed at the output end of the servo motor (6); The second annular frame (101) is a structure of two annular plates separated from each other; and the inner wall sides of the two annular plates are fixedly connected with a supporting frame plate (102) at intervals of 90 degrees; the auxiliary annular frame (103) is movably installed at positions on both sides of the inner wall of the second annular frame (101); and a fourth gear sleeve (104) is fixedly installed on the outer edge surface of the auxiliary annular frame (103); a column (107) is movably installed at the middle position of the upper surface of the supporting frame plate (102) at the bottom of the second annular frame (101); and the upper side of the column (107) is fixedly installed A bevel gear (108) is provided which meshes with the fourth gear sleeves (104) on both sides; a gear sheet (109) is fixedly installed on the lower side of the column rod (107); a sleeve frame (1010) is movably installed at the bottom center of the gear sheet (109); the sleeve frame (1010) meshes with the reciprocating threaded rod (38) in the driving cavity (36); the gear sheet (109) is placed in the driving cavity (36); and a toothed side plate (314) which meshes with the side surface of the gear sheet (109) is fixedly installed on one side of the driving cavity (36); Second conduits (1011) are fixedly mounted on the support frame plates (102) at the left and right sides and upper positions of the inner wall of the second circular ring frame (101); and the bottom of each second conduit (1011) is fixedly connected to an outward-expanding spray pipe (1012), the outward-expanding spray pipe (1012) as a whole is in the shape of two branch pipes that are tilted outward to align with the auxiliary circular ring frame (103), and a plurality of reserved openings (106) that communicate with the inner wall end brush circular ring plate (105) are sequentially opened on the outer circular surface of the second circular ring frame (101), and a third conduit (1013) that communicates with the second conduit (1011) on each side is fixedly mounted on the outer circular surface of the second circular ring frame (101); A cavity cylindrical sleeve (1014) is fixedly connected to the middle position of the upper side of the second annular frame (101), and a folding airbag cylinder (311) is fixedly installed on the inner side surface of the cover plate (371) corresponding to the position of the extrusion cavity (35), and the cavity cylindrical sleeve (1014) is open on the side facing the folding airbag cylinder (311), and a third conduit (1014) is fixedly installed on the side surface of the non-open end of the cavity cylindrical sleeve (1014). 013); and each hollow cylindrical sleeve (1014) is fixedly connected with a threaded conduit (1016) which is in communication with the fourth conduit (1015), the outer side of the threaded conduit (1016) is in communication with the folding airbag tube (311), and the bottom output end of the cleaning reagent storage box (8) is fixedly connected with a first conduit (9), and the first conduit (9) is in communication with the folding airbag tube (311) on the corresponding side; A limited circular ring sleeve (372) is fixedly connected to the inner wall of a circular opening corresponding to the axis of the filter cavity (32) reserved on the surface of the opening cover plate (371), and second circular ring sleeve grooves (376) are provided on both sides of the connecting conduit (5). A double circular ring sleeve frame (373) is movably sleeved on the outer side of the second circular ring sleeve groove (376), and a circular ring on the side of the double circular ring sleeve frame (373) close to the opening cover plate (371) is fixedly mounted with a movably sleeved ring that is movably sleeved with the limited circular ring sleeve (372). The first circular ring is movably sleeved with a notch (374), a first gear sleeve (375) is fixedly mounted on the circular ring of the double circular ring frame (373) away from the cover plate (371) with a mouth, and a third gear sleeve (312) is fixedly mounted on both sides of the external support rod (39) at a position directly below the first gear sleeve (375), and the third gear sleeves (312) on both sides of the external support rod (39) are meshed with the first gear sleeve (375) and sleeved with a first crawler (315).

2. The integrated landfill leachate nanofiltration membrane and reverse osmosis treatment device according to claim 1, characterized in that: The inner filter element cleaning mechanism (313) comprises a first circular ring frame (3131) fixedly connected to a first circular ring sleeve notch (374) and extending from an end surface of one side in the filter cavity (32); the first circular ring frame (3131) is in the shape of a hollow bracket as a whole; and is sleeved on the outer sides of the first center tube (34) and the second center tube (42) on the corresponding sides; a double-head scraper (3132) is fixedly mounted on the first circular ring frame (3131).

3. The integrated landfill leachate nanofiltration membrane and reverse osmosis treatment device according to claim 2, characterized in that: The outer scraper end of the double-headed scraper (3132) fits with the inner ring of the nanofiltration membrane filtration component (33) and the reverse osmosis membrane filtration component (43), and the inner scraper end of the double-headed scraper (3132) fits with the outer circumferential surface of the first central tube (34) and the second central tube (42).

4. The integrated landfill leachate nanofiltration membrane and reverse osmosis treatment device according to claim 3, characterized in that: Corresponding waterproof sealing rings are arranged on the movable fitting ends of the limiting circular ring sleeve (372), the first circular ring fitting notch (374) and the second circular ring fitting notch (376).

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