An MBR membrane structure for backwashing filtration and a filtration device with the same

Abstract

The present invention belongs to the field of MBR, and provides an MBR membrane structure for backwashing filtration and a filtration device with the same, including a support frame, a rear side plate, a front baffle, and a plurality of flat membranes. The rear side plate is fixedly installed on the rear side of the support frame by bolts. By setting a sealing component, when there is more sewage to be treated, the first electric telescopic rod drives the sealing plate to move outwards, so that the sealing plate is away from the side of the support frame, allowing sewage to enter the support frame through the gap between the sealing plate and the support frame, improving the sewage treatment efficiency; when there is less sewage to be treated, the first electric telescopic rod drives the sealing plate to move inwards, so that the sealing plate seals the upper half of the support frame again, allowing sewage to only enter the support frame from the water inlet, thereby preventing air from entering the support frame, reducing the volume of air inhaled by the flat membranes, increasing the pumping efficiency of the water production component from the flat membranes, and reducing the waste of water resources.

Description

Technical Field

[0001] The present invention belongs to the field of MBR, and particularly relates to an MBR membrane structure for backwashing filtration and a filtration device with the same. Background Art

[0002] A membrane bioreactor, with the English name Membrane Bio-Reactor, abbreviated as MBR, is a new water treatment technology that combines a membrane separation unit and a biological treatment unit. This process can be used as a deep treatment unit for traditional water treatment processes.

[0003] MBR is usually installed in a membrane tank. When treating sewage, it is necessary to submerge the sewage over the top of the MBR and continuously introduce sewage into the membrane tank to maintain the balance of water production and water conveyance.

[0004] However, for some small-scale sewage treatment work, MBR is not applicable. For example, in the backwashing operation of pipelines, after the pipeline is backwashed, the backwashed sewage is usually filtered so that this part of the water resources can be reused to reduce water resource waste. But after the backwashing work is completed, there will be no more sewage input. When the liquid level of the sewage is lower than the top of the MBR, part of the MBR membrane will be exposed to the air, and the water production pump will draw air through the MBR membrane, resulting in a decrease in its suction force on the sewage. When the liquid level of the sewage is lower than a certain height, the water production pump will no longer draw sewage, causing a large amount of water resources to be wasted and the remaining sewage cannot be filtered by the MBR. Summary of the Invention

[0005] The purpose of the present invention is to provide an MBR membrane structure for backwashing filtration and a filtration device with the same, aiming to solve the technical problem of a large amount of water resource waste caused when using MBR to treat a fixed amount of sewage in the prior art.

[0006] The present invention is realized as follows. An MBR membrane structure for backwashing filtration includes a support frame, a rear side plate, a front baffle, and a plurality of flat membranes. The rear side plate is fixedly installed on the rear side of the support frame by bolts. There is a water inlet with a width of 30 - 50 mm between the bottom of the rear side plate and the bottom of the support frame. The front baffle is fixedly installed on the front side of the support frame by bolts. A plurality of flat membranes are all installed inside the support frame. The flat membrane includes an MBR membrane. A sealing frame is fixedly installed on the outer periphery of the MBR membrane. The sealing frame is communicated with the MBR membrane. An upper water outlet pipe is communicated with the upper part of one side surface of the sealing frame. A lower water outlet pipe is communicated with the lower part of the other side surface of the sealing frame. Lower pipe holes adapted to a plurality of lower water outlet pipes are opened on the rear side plate. In order to make the installation of the flat membrane more stable, a plurality of membrane slots adapted to the sealing frame are fixedly connected to the rear side plate. Upper pipe holes adapted to a plurality of upper water outlet pipes are opened on the front baffle;

[0007] A water production component is also installed on the support frame. The water production component has two input ends, and the two input ends of the water production component are respectively communicated with a plurality of upper water outlet pipes and a plurality of lower water outlet pipes. The water production component is used to pump out the water filtered by the flat membrane.

[0008] A sealing component is also installed inside the support frame. The output end of the sealing component extends to the front side of the support frame. There is a water inlet with a width of 30 - 50 mm between the bottom of the output end of the sealing component and the bottom of the support frame. The sealing component is used to seal the upper part of the front side of the support frame, thereby preventing the water production component from extracting air and reducing water resource waste.

[0009] Further technical solution: The sealing component includes a mounting plate installed inside the support frame. A plate slot adapted to the mounting plate is fixedly connected to the side of the rear side plate. Two elastic telescopic rods are hinged to the side of the mounting plate close to the front baffle. The same sealing plate is hinged to one ends of the two elastic telescopic rods. A first electric telescopic rod is also hinged to the side of the mounting plate. The movable end of the first electric telescopic rod is hinged to the side of the sealing plate.

[0010] In order to prevent the front baffle from affecting the movement of the sealing plate and enable the sealing plate to be opened smoothly for sewage to enter the support frame, a second guiding inclined surface is provided at one end of the sealing plate close to the front baffle, and a first guiding inclined surface is provided at one end of the front baffle close to the sealing plate. The second guiding inclined surface and the first guiding inclined surface are in contact, and the first electric telescopic rod is arranged obliquely upward.

[0011] Further technical solution: The elastic telescopic rod includes a fixed sleeve, a movable rod, and a tension spring. The fixed sleeve is hinged to the side of the mounting plate. The movable rod is slidably installed at one end of the fixed sleeve. The tension spring is connected between the movable rod and the fixed sleeve.

[0012] Further technical solution: The water production component includes a water production pump installed on the support frame. The water outlet end of the water production pump is communicated with a main water production pipe. The water inlet end of the water production pump is communicated with a main water inlet pipe. One end of the main water inlet pipe is communicated with a second three-way pipe. One end of the second three-way pipe is communicated with an upper water production branch pipe through an upper water inlet branch pipe. The upper water production branch pipe is installed on the support frame. A plurality of the upper water outlet pipes are all communicated with the upper water production branch pipe through upper hoses. An upper valve is arranged on the upper water inlet branch pipe. The other end of the second three-way pipe is communicated with a lower water production branch pipe through a lower water inlet branch pipe. The lower water production branch pipe is installed on the rear side plate. A plurality of the lower water outlet pipes are all communicated with the lower water production branch pipe through lower hoses. A lower valve is arranged on the lower water inlet branch pipe.

[0013] Further technical solution: It further includes an aeration component, and the aeration component includes a blower installed on the support frame. The output end of the blower is communicated with an air outlet pipe. One end of the air outlet pipe is communicated with a first three-way pipe, and the first three-way pipe is installed on the support frame. Both output ends of the first three-way pipe are communicated with air diffuser pipes. The air diffuser pipes are located below all the flat membranes, and a plurality of exhaust holes are formed in the air diffuser pipes.

[0014] A filtering device with an MBR membrane structure for backwashing and filtering includes a filtering tank. A water inlet pipe is arranged on the side of the filtering tank. A liquid accumulation tank is formed at the inner bottom of the filtering tank, and the depth of the liquid accumulation tank is greater than the height of the water inlet. A drain pipe communicated with the liquid accumulation tank is arranged on the side of the filtering tank.

[0015] A lifting component is installed inside the filtering tank. The output end of the lifting component extends into the liquid accumulation tank. The MBR membrane structure for backwashing and filtering is installed at the output end of the lifting component, and the lifting component is used to drive the MBR membrane structure for backwashing and filtering to lift and lower.

[0016] Further technical solution: The lifting component includes a second electric telescopic rod fixedly installed in the filtering tank. The movable end of the second electric telescopic rod is fixedly connected with a lifting flat plate. The lifting flat plate is slidably connected in the liquid accumulation tank, and the MBR membrane structure for backwashing and filtering is installed on the lifting flat plate.

[0017] Further technical solution: An interception mechanism is further installed on the filtering tank. The interception mechanism includes an interception net slidably installed in the liquid accumulation tank. The interception net is located outside the lifting flat plate. An installation cavity is formed at the inner bottom of the filtering tank. One end of the interception net located in the installation cavity is fixedly connected with a first rack. An intermediate gear is rotatably connected in the installation cavity. The first rack and the intermediate gear are meshed and connected. A second rack is fixedly connected to the bottom of the lifting flat plate, and the end of the second rack extending into the installation cavity is meshed and connected with the intermediate gear.

[0018] Further technical solution: A filtering grille is arranged inside the filtering tank. The filtering grille is located at the outlet of the water inlet pipe. The filtering grille first performs primary filtration on the sewage coming out of the water inlet pipe to filter out large-particle impurities.

[0019] [[ID=IS]]Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, by providing a sealing assembly, when there is a large amount of sewage to be treated, the first electric telescopic rod drives the sealing plate to move outwards, so that the side of the sealing plate away from the support frame, allowing sewage to enter the support frame through the gap between the sealing plate and the support frame, improving the sewage treatment efficiency; when there is a small amount of sewage to be treated, the first electric telescopic rod drives the sealing plate to move inwards, so that the sealing plate seals the upper half of the support frame again, allowing sewage to only enter the support frame from the water inlet, thus preventing air from entering the support frame, reducing the volume of air inhaled by the flat membrane, increasing the efficiency of the water production assembly pumping water from the flat membrane, and reducing the waste of water resources;

[0021] 2. In the present invention, by providing a second guiding inclined surface at one end of the sealing plate close to the front baffle, a first guiding inclined surface at one end of the front baffle close to the sealing plate, and an elastic telescopic rod, the influence of the front baffle on the movement of the sealing plate can be avoided, and the sealing plate can be smoothly opened;

[0022] 3. In the present invention, by providing an upper water outlet pipe and a lower water outlet pipe on the MBR membrane, and providing an upper valve on the corresponding upper water inlet branch pipe and a lower valve on the lower water inlet branch pipe, when treating a large amount of sewage, both the upper valve and the lower valve are opened, so that both the lower water production branch pipe and the upper water production branch pipe can produce water; when treating a small amount of sewage, the upper valve is closed to avoid the upper water production branch pipe inhaling air, improving the water production per unit time;

[0023] 4. In the present invention, by providing a liquid accumulation tank in the filtration tank, and driving the MBR membrane structure for backwashing and filtration to lift and lower through a lifting assembly, when treating a small amount of sewage, the MBR membrane structure for backwashing and filtration is lowered into the liquid accumulation tank through the lifting assembly, and the water inlet is immersed in the liquid accumulation tank, so that the sewage in the filtration tank will flow into the liquid accumulation tank and enter the support frame from the water inlet, reducing the waste of water resources;

[0024] 5. In the present invention, by providing an interception mechanism, when the second electric telescopic rod drives the MBR membrane structure for backwashing and filtration to lower through the lifting flat plate, the lifting flat plate will drive the interception net to rise, so that the interception net surrounds the MBR membrane structure for backwashing and filtration, preventing the sediment in the filtration tank from being washed into the liquid accumulation tank and preventing impurities from blocking the water inlet, improving the sewage filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram of the MBR membrane structure for backwashing and filtration in the open state of the sealing plate of the present invention.

[0026] Figure 2 is the overall structural schematic diagram of the MBR membrane structure for backwashing and filtration in the closed state of the sealing plate of the present invention.

[0027] Figure 3This is a rear view structural schematic diagram of the MBR membrane structure for backwashing filtration in the present invention.

[0028] Figure 4 This is an exploded structural schematic diagram of the MBR membrane structure for backwashing filtration in the present invention.

[0029] Figure 5 This is a structural schematic diagram of the sealing assembly in the present invention.

[0030] Figure 6 This is a structural schematic diagram of the aeration assembly in the present invention.

[0031] Figure 7 This is a structural schematic diagram of the rear side plate in the present invention.

[0032] Figure 8 This is a structural schematic diagram of the flat membrane in the present invention.

[0033] Figure 9 This is a structural schematic diagram of the filtration device with the MBR membrane structure for backwashing filtration in the present invention.

[0034] Figure 10 This is a partial cross-sectional schematic diagram of the filtration device with the MBR membrane structure for backwashing filtration in the present invention.

[0035] Figure 11 This is a structural schematic diagram of the interception net in the present invention.

[0036] In the drawings: 1. Support frame; 2. Rear side plate; 21. Membrane slot; 22. Plate slot; 23. Lower pipe hole; 3. Aeration assembly; 31. Fan; 32. Air outlet pipe; 33. Aeration pipe; 34. First three-way pipe; 4. Water production assembly; 41. Second three-way pipe; 42. Upper water inlet branch pipe; 43. Water inlet main pipe; 44. Water production main pipe; 45. Upper water production branch pipe; 46. Water production pump; 47. Lower water inlet branch pipe; 48. Lower water production branch pipe; 49. Lower hose; 410. Upper hose; 5. Front baffle; 51. First guiding inclined surface; 52. Upper pipe hole; 6. Sealing assembly; 61. Mounting plate; 62. Second guiding inclined surface; 63. Elastic telescopic rod; 64. First electric telescopic rod; 65. Sealing plate; 7. Flat membrane; 71. Upper water outlet pipe; 72. Sealing frame; 73. MBR membrane; 74. Lower water outlet pipe; 8. Interception mechanism; 81. First rack; 82. Intermediate gear; 83. Interception net; 84. Second rack; 85. Installation cavity; 9. Lifting assembly; 91. Second electric telescopic rod; 92. Lifting flat plate; 10. Filter tank; 11. Drain pipe; 12. Water inlet pipe; 13. Filter grille. Detailed implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0039] As Figures 1 - 8 shown, a MBR membrane structure for backwashing filtration provided by the present invention includes a support frame 1, a rear side plate 2, a front baffle 5 and a plurality of flat membranes 7. The rear side plate 2 is fixedly installed on the rear side of the support frame 1 by bolts. There is a water inlet with a width of 30-50 mm between the bottom of the rear side plate 2 and the bottom of the support frame 1. The front baffle 5 is fixedly installed on the front side of the support frame 1 by bolts. A plurality of the flat membranes 7 are all installed inside the support frame 1. The flat membrane 7 includes a MBR membrane 73. A sealing frame 72 is fixedly installed on the outer side of the periphery of the MBR membrane 73. The sealing frame 72 is communicated with the MBR membrane 73. An upper water outlet pipe 71 is communicated with the upper part of one side surface of the sealing frame 72. A lower water outlet pipe 74 is communicated with the lower part of the other side surface of the sealing frame 72. Lower pipe holes 23 adapted to a plurality of the lower water outlet pipes 74 are formed on the rear side plate 2. In order to make the installation of the flat membrane 7 more stable, a plurality of membrane slots 21 adapted to the sealing frame 72 are fixedly connected to the rear side plate 2. Upper pipe holes 52 adapted to a plurality of the upper water outlet pipes 71 are formed on the front baffle 5;

[0040] A water production assembly 4 is further installed on the support frame 1. The water production assembly 4 has two input ends. The two input ends of the water production assembly 4 are respectively communicated with a plurality of the upper water outlet pipes 71 and a plurality of the lower water outlet pipes 74. The water production assembly 4 is used to pump out the water filtered by the flat membrane 7;

[0041] A sealing assembly 6 is further installed inside the support frame 1. The output end of the sealing assembly 6 extends to the front side of the support frame 1. There is a water inlet with a width of 30-50 mm between the bottom of the output end of the sealing assembly 6 and the bottom of the support frame 1. The sealing assembly 6 is used to seal the upper part of the front side of the support frame 1, thereby preventing the water production assembly 4 from sucking air and reducing the waste of water resources.

[0042] As Figures 1 - 5As shown in the figure, this is an MBR membrane structure for backwashing filtration provided by the present invention. In this embodiment, the sealing assembly 6 includes a mounting plate 61, the mounting plate 61 is installed inside the support frame 1, a plate slot 22 adapted to the mounting plate 61 is fixedly connected to the side of the rear side plate 2, two elastic telescopic rods 63 are hinged to the side of the mounting plate 61 close to the front baffle 5, one end of each of the two elastic telescopic rods 63 is hinged to the same sealing plate 65, and a first electric telescopic rod 64 is also hinged to the side of the mounting plate 61, and the movable end of the first electric telescopic rod 64 is hinged to the side of the sealing plate 65;

[0043] In order to prevent the front baffle 5 from affecting the movement of the sealing plate 65 and enable the sealing plate 65 to be smoothly opened for sewage to enter the support frame 1, a second guiding inclined surface 62 is provided at one end of the sealing plate 65 close to the front baffle 5, a first guiding inclined surface 51 is provided at one end of the front baffle 5 close to the sealing plate 65, the second guiding inclined surface 62 and the first guiding inclined surface 51 are in contact, and the first electric telescopic rod 64 is arranged obliquely upward.

[0044] When the amount of sewage to be treated is large (taking the standard that it can overflow the support frame 1), the first electric telescopic rod 64 drives the sealing plate 65 to move outwards, and the two elastic telescopic rods 63 play an auxiliary supporting role in the movement of the sealing plate 65, so that the side of the sealing plate 65 away from the support frame 1 is separated, so that sewage can enter the support frame 1 through the gap between the sealing plate 65 and the support frame 1, improving the sewage treatment efficiency;

[0045] When the amount of sewage to be treated is small (taking the standard that it is lower than the central plane of the sealing plate 65), the first electric telescopic rod 64 drives the sealing plate 65 to move inwards, so that the sealing plate 65 seals the upper half of the support frame 1 again. At this time, the sewage will overflow the water inlet, and a large amount of sewage will seal the water inlet, so that the sewage can only enter the support frame 1 through the water inlet between the sealing plate 65 and the bottom of the support frame 1, thereby preventing air from entering the support frame 1 and reducing the volume of air sucked by the flat membrane 7, and increasing the pumping efficiency of the water production assembly 4 from the flat membrane 7.

[0046] As Figures 1 - 5 shown in the figure, this is an MBR membrane structure for backwashing filtration provided by the present invention. In this embodiment, the elastic telescopic rod 63 includes a fixed sleeve, a movable rod and a tension spring. The fixed sleeve is hinged to the side of the mounting plate 61, the movable rod is slidably installed at one end of the fixed sleeve, and the tension spring is connected between the movable rod and the fixed sleeve.

[0047] When the first electric telescopic rod 64 drives the sealing plate 65 to move obliquely upward, the sealing plate 65 will slide along the first guiding inclined surface 51 on the front baffle 5 through the second guiding inclined surface 62. Under the extrusion of the front baffle 5, the sealing plate 65 will pull the movable rod to move outward. Under the action of the tension spring, the sealing plate 65 can move smoothly.

[0048] As Figures 1 - 3 and Figure 8 shown, a MBR membrane structure for backwashing filtration provided by the present invention. In this embodiment, the water production assembly 4 includes a water production pump 46 installed on the support frame 1. The water outlet end of the water production pump 46 is communicated with a main water production pipe 44, and the water inlet end of the water production pump 46 is communicated with a main water inlet pipe 43. One end of the main water inlet pipe 43 is communicated with a second three-way pipe 41. One end of the second three-way pipe 41 is communicated with an upper water production branch pipe 45 through an upper water inlet branch pipe 42. The upper water production branch pipe 45 is installed on the support frame 1. A plurality of the upper water outlet pipes 71 are all communicated with the upper water production branch pipe 45 through upper hoses 410. An upper valve is arranged on the upper water inlet branch pipe 42. The other end of the second three-way pipe 41 is communicated with a lower water production branch pipe 48 through a lower water inlet branch pipe 47. The lower water production branch pipe 48 is installed on the rear side plate 2. A plurality of the lower water outlet pipes 74 are all communicated with the lower water production branch pipe 48 through lower hoses 49. A lower valve is arranged on the lower water inlet branch pipe 47.

[0049] When treating a large amount of sewage, both the upper valve and the lower valve are opened so that both the lower water production branch pipe 48 and the upper water production branch pipe 45 can produce water. When treating a small amount of sewage, the upper valve is closed to prevent the upper water production branch pipe 45 from sucking in air and improve the water production per unit time.

[0050] As Figures 1 - 3 and Figure 6 shown, a MBR membrane structure for backwashing filtration provided by the present invention. In order to reduce the dirt deposited on the surface of the flat membrane 7, thereby reducing the pollution phenomenon of the flat membrane 7, maintaining the good flux of the flat membrane 7, prolonging its service life, and improving the sewage treatment effect, in this embodiment, it further includes an aeration assembly 3. The aeration assembly 3 includes a blower 31 installed on the support frame 1. The output end of the blower 31 is communicated with an air outlet pipe 32. One end of the air outlet pipe 32 is communicated with a first three-way pipe 34. The first three-way pipe 34 is installed on the support frame 1. Both output ends of the first three-way pipe 34 are communicated with an aeration pipe 33. The aeration pipe 33 is located below all the flat membranes 7. A plurality of exhaust holes are formed in the aeration pipe 33.

[0051] When treating a large amount of sewage, the blower 31 inputs air into the aeration pipe 33 through the air outlet pipe 32 and the first three-way pipe 34. The air is discharged into the sewage from the exhaust holes and forms bubbles, and the bubbles pass through between a plurality of flat membranes 7;

[0052] The oxygen contained in the bubbles can provide the necessary oxygen for the microorganisms in the sewage, promote the decomposition and transformation of the organic matter in the sewage, and improve the sewage treatment effect;

[0053] At the same time, the bubbles can increase the stirring effect of the sewage, prevent sludge deposition and clogging of the flat membrane 7, and through continuous bubble impact, the dirt deposited on the surface of the flat membrane 7 can be effectively reduced, thereby reducing the pollution phenomenon of the flat membrane 7, maintaining the good flux of the flat membrane 7 and extending its service life.

[0054] When less sewage is being treated, the blower 31 is turned off to prevent the water production assembly 4 from drawing too much air through the flat membrane 7.

[0055] Such as Figure 1 and Figures 9 - 10 As shown in

[0056] a filtering device with an MBR membrane structure for backwashing and filtering provided by the present invention. In this embodiment, it includes a filtering tank 10, a water inlet pipe 12 is arranged on the side of the filtering tank 10, a liquid accumulation tank is opened at the inner bottom of the filtering tank 10, the depth of the liquid accumulation tank is greater than the height of the water inlet, and a drain pipe 11 communicating with the liquid accumulation tank is arranged on the side of the filtering tank 10;

[0057] A lifting assembly 9 is installed inside the filtering tank 10, the output end of the lifting assembly 9 extends into the liquid accumulation tank, the MBR membrane structure for backwashing and filtering is installed at the output end of the lifting assembly 9, and the lifting assembly 9 is used to drive the MBR membrane structure for backwashing and filtering to lift and lower.

[0058] Such as Figure 1 and Figure 10 As shown in

[0059] Such as Figures 9 - 11As shown in the figure, a filtering device with an MBR membrane structure for backwashing filtration provided by the present invention. During the process of sewage in the filtering tank 10 flowing into the liquid accumulation tank, in order to prevent sediment from entering the liquid accumulation tank as well, in this embodiment, an interception mechanism 8 is further installed on the filtering tank 10. The interception mechanism 8 includes an interception net 83 slidably installed in the liquid accumulation tank. The interception net 83 is located outside the lifting flat plate 92. An installation cavity 85 is formed at the inner bottom of the filtering tank 10. One end of the interception net 83 located in the installation cavity 85 is fixedly connected to a first rack 81. An intermediate gear 82 is rotatably connected in the installation cavity 85. The first rack 81 is meshed with the intermediate gear 82. A second rack 84 is fixedly connected to the bottom of the lifting flat plate 92. One end of the second rack 84 extending into the installation cavity 85 is meshed with the intermediate gear 82.

[0060] When the second electric telescopic rod 91 drives the MBR membrane structure for backwashing filtration to descend through the lifting flat plate 92, the lifting flat plate 92 drives the intermediate gear 82 to rotate through the second rack 84. The intermediate gear 82 drives the first rack 81 to rise. The first rack 81 drives the interception net 83 to rise, so that the interception net 83 surrounds the MBR membrane structure for backwashing filtration, preventing the sediment in the filtering tank 10 from being washed into the liquid accumulation tank, avoiding blockage of the water inlet by impurities, and improving the sewage filtration efficiency.

[0061] As Figure 1 and Figure 9 As shown in the figure, a filtering device with an MBR membrane structure for backwashing filtration provided by the present invention. In order to reduce the blockage of the flat membrane 7 by large particle impurities, in this embodiment, a filtering grille 13 is arranged inside the filtering tank 10. The filtering grille 13 is located at the outlet of the water inlet pipe 12. The filtering grille 13 first performs primary filtration on the sewage flowing out of the water inlet pipe 12 to filter out large particle impurities.

[0062] Working principle:

[0063] Connect the water inlet pipe 12 to the pipeline to be backwashed. The sewage flowing out of the pipeline to be backwashed will directly flow into the filtering tank 10. The filtering grille 13 will first filter out the large particle impurities in the sewage;

[0064] When the sewage overflows the top of the sealing plate 65, start the water production pump 46 and the blower 31. The water production pump 46 extracts the sewage in the support frame 1 through the upper water production branch pipe 45 and the lower water production branch pipe 48. The sewage becomes clean water after being filtered by the flat membrane 7 and then is output from the water production main pipe 44. The blower 31 aerates the bottom of the flat membrane 7 through the aeration pipe 33. Then control the water output of the backwashing to keep the sewage entering the filtering tank 10 and the water extracted by the water production pump 46 in balance, and the sewage can be continuously filtered;

[0065] After the backwashing operation is completed, sewage is no longer introduced into the filtration tank 10, and the liquid level in the filtration tank 10 will gradually decrease. When the liquid level drops below the central plane of the sealing plate 65, the first electric telescopic rod 64 drives the sealing plate 65 to seal the side of the support frame 1. At the same time, the upper valve is closed and the blower 31 is turned off, so that the water production pump 46 only pumps water from the lower water outlet pipe 74, reducing the amount of air drawn by the water production pump 46 and improving the water production efficiency;

[0066] When the liquid level in the filtration tank 10 is lower than the water inlet, the second electric telescopic rod 91 drives the MBR membrane structure for backwashing filtration to descend through the lifting flat plate 92, so that the water inlet completely sinks into the liquid accumulation tank. The sewage in the filtration tank 10 will flow into the liquid accumulation tank and submerge the water inlet again. The water production pump 46 can continue to treat the sewage in the liquid accumulation tank, reducing the waste of water resources;

[0067] After the treatment is completed, the residual sewage in the liquid accumulation tank can be discharged through the drain pipe 11, and the MBR membrane structure for backwashing filtration is restored to its original position and state, waiting for the next use.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0069] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A filtering device with an MBR membrane structure for backwashing filtration, comprising an MBR membrane structure for backwashing filtration and a filtration tank (10), characterized in that, The MBR membrane structure for backwashing filtration includes a support frame (1), a rear side plate (2), a front baffle (5), and a plurality of flat membranes (7). The rear side plate (2) is fixedly installed on the rear side of the support frame (1), the front baffle (5) is fixedly installed on the front side of the support frame (1), and a plurality of the flat membranes (7) are all installed inside the support frame (1). There is a water inlet left between the bottom of the rear side plate (2) and the bottom of the support frame (1). The flat membrane (7) includes an MBR membrane (73). A sealing frame (72) is fixedly installed on the outer periphery of the MBR membrane (73). The sealing frame (72) is communicated with the MBR membrane (73). An upper water outlet pipe (71) is communicated with the upper part of one side surface of the sealing frame (72), and a lower water outlet pipe (74) is communicated with the lower part of the other side surface of the sealing frame (72). Lower pipe holes (23) adapted to a plurality of the lower water outlet pipes (74) are formed in the rear side plate (2). A plurality of membrane slots (21) adapted to the sealing frame (72) are fixedly connected to the rear side plate (2). Upper pipe holes (52) adapted to a plurality of the upper water outlet pipes (71) are formed in the front baffle (5). A water production assembly (4) is further installed on the support frame (1). The water production assembly (4) has two input ends. The two input ends of the water production assembly (4) are respectively communicated with a plurality of the upper water outlet pipes (71) and a plurality of the lower water outlet pipes (74). The water production assembly (4) is used for pumping out the water filtered by the flat membrane (7). A sealing assembly (6) is further installed inside the support frame (1). The output end of the sealing assembly (6) extends to the front side of the support frame (1). There is a water inlet left between the bottom of the output end of the sealing assembly (6) and the bottom of the support frame (1). The sealing assembly (6) is used for sealing the upper part of the front side of the support frame (1). The sealing assembly (6) includes a mounting plate (61). The mounting plate (61) is installed inside the support frame (1). A plate slot (22) adapted to the mounting plate (61) is fixedly connected to the side surface of the rear side plate (2). Two elastic telescopic rods (63) are hinged to the side surface of the mounting plate (61) close to the front baffle (5). The same sealing plate (65) is hinged to one ends of the two elastic telescopic rods (63). A first electric telescopic rod (64) is also hinged to the side surface of the mounting plate (61). The movable end of the first electric telescopic rod (64) is hinged to the side surface of the sealing plate (65). A second guiding inclined surface (62) is formed at one end of the sealing plate (65) close to the front baffle (5). A first guiding inclined surface (51) is formed at one end of the front baffle (5) close to the sealing plate (65). The second guiding inclined surface (62) contacts the first guiding inclined surface (51). The first electric telescopic rod (64) is arranged obliquely upward. The side of the filtration tank (10) is provided with a water inlet pipe (12). A liquid accumulation tank is formed at the inner bottom of the filtration tank (10). The depth of the liquid accumulation tank is greater than the height of the water inlet. The side of the filtration tank (10) is provided with a drain pipe (11) communicated with the liquid accumulation tank; A lifting assembly (9) is installed inside the filtration tank (10). The output end of the lifting assembly (9) extends into the liquid accumulation tank. The MBR membrane structure for backwashing filtration is installed at the output end of the lifting assembly (9). The lifting assembly (9) is used to drive the MBR membrane structure for backwashing filtration to lift and lower.

2. The filtration device with the MBR membrane structure for backwashing filtration according to claim 1, characterized in that, The elastic telescopic rod (63) includes a fixed sleeve, a movable rod and a tension spring. The fixed sleeve is hinged to the side of the mounting plate (61). The movable rod is slidably installed at one end of the fixed sleeve. The tension spring is connected between the movable rod and the fixed sleeve.

3. The filtering device with the MBR membrane structure for backwashing filtration according to claim 1, characterized in that, The water production assembly (4) includes a water production pump (46) installed on the support frame (1). The water outlet end of the water production pump (46) is communicated with a main water production pipe (44). The water inlet end of the water production pump (46) is communicated with a main water inlet pipe (43). One end of the main water inlet pipe (43) is communicated with a second three-way pipe (41). One end of the second three-way pipe (41) is communicated with an upper water production branch pipe (45) through an upper water inlet branch pipe (42). The upper water production branch pipe (45) is installed on the support frame (1). A plurality of the upper water outlet pipes (71) are all communicated with the upper water production branch pipe (45) through upper hoses (410). An upper valve is arranged on the upper water inlet branch pipe (42). The other end of the second three-way pipe (41) is communicated with a lower water production branch pipe (48) through a lower water inlet branch pipe (47). The lower water production branch pipe (48) is installed on the rear side plate (2). A plurality of the lower water outlet pipes (74) are all communicated with the lower water production branch pipe (48) through lower hoses (49). A lower valve is arranged on the lower water inlet branch pipe (47).

4. The filtering device with an MBR membrane structure for backwashing filtration according to claim 1, characterized in that, An aeration assembly (3) is further installed on the support frame (1). The aeration assembly (3) includes a fan (31) installed on the support frame (1). The output end of the fan (31) is communicated with an air outlet pipe (32). One end of the air outlet pipe (32) is communicated with a first three-way pipe (34). The first three-way pipe (34) is installed on the support frame (1). Both output ends of the first three-way pipe (34) are communicated with aeration pipes (33). The aeration pipes (33) are located below all the flat membranes (7). A plurality of exhaust holes are formed in the aeration pipes (33).

5. The filtration device with an MBR membrane structure for backwashing filtration according to claim 1, characterized in that, The lifting assembly (9) includes a second electric telescopic rod (91) fixedly installed in the filtration tank (10). The movable end of the second electric telescopic rod (91) is fixedly connected with a lifting flat plate (92). The lifting flat plate (92) is slidably connected in the liquid accumulation tank. The MBR membrane structure for backwashing filtration is installed on the lifting flat plate (92).

6. The filtration device with an MBR membrane structure for backwashing filtration according to claim 5, characterized in that, An interception mechanism (8) is further installed on the filter tank (10). The interception mechanism (8) includes an interception net (83) slidably installed in the liquid accumulation tank. The interception net (83) is located outside the lifting flat plate (92). An installation cavity (85) is formed in the inner bottom of the filter tank (10). A first rack (81) is fixedly connected to one end of the interception net (83) located in the installation cavity (85). An intermediate gear (82) is rotatably connected in the installation cavity (85). The first rack (81) is meshed with the intermediate gear (82). A second rack (84) is fixedly connected to the bottom of the lifting flat plate (92). One end of the second rack (84) extending into the installation cavity (85) is meshed with the intermediate gear (82).

7. The filtration device with an MBR membrane structure for backwashing filtration according to claim 1, characterized in that, A filter grille (13) is arranged inside the filter tank (10). The filter grille (13) is located at the outlet of the water inlet pipe (12).

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