MOBR membrane bioreactor for wastewater treatment

Abstract

The invention relates to the field of wastewater treatment, in particular to an MOBR membrane bioreactor for wastewater treatment. Comprising a processing box and rectangular frames arranged in the processing box at equal intervals; a first water inlet pipe and a first water outlet pipe are arranged on the treatment box; film bodies are arranged on two sides of the rectangular frame; a cleaning mechanism for cleaning the film body is arranged in the rectangular frame; a strip-shaped through groove is formed in the upper end of the rectangular frame, the cleaning mechanism comprises a strip-shaped box arranged in the corresponding strip-shaped through groove in a sliding mode, a plurality of vertically-downward exhaust barrels are arranged on the strip-shaped box, exhaust holes are formed in the exhaust barrels, a plurality of sleeves arranged on the exhaust barrels in a sleeving mode are arranged in the rectangular frame, and closed air holes are formed in the sleeves; and a pollution discharge mechanism for blocking and opening gaps between the adjacent rectangular frames and between the rectangular frames and the inner wall of the processing box is also arranged in the processing box. The membrane body can be cleaned through the exhaust hole, and impurities are isolated through the pollution discharge mechanism, so that the wastewater treatment effect of the membrane body is ensured.

Description

Technical Field

[0001] The present invention relates to the field of wastewater treatment, in particular to a MOBR membrane bioreactor for wastewater treatment. Background Art

[0002] The MOBR membrane can achieve membrane water outlet by alternating the arrangement of MBR and MABR membrane fibers. The aeration of the MABR membrane fibers can also efficiently flush the surface of the MBR membrane fibers, achieving precise membrane cleaning, delaying membrane fouling, and improving membrane flux.

[0003] Chinese patent: CN222631196U discloses a MOBR membrane bioreactor, which belongs to the field of MOBR membrane technology. The key points of its technical solution include a shell, a shell cover is provided on the top of the shell, an adjustment mechanism is provided inside the shell, and a membrane body is provided inside the shell; the adjustment mechanism includes two limit plates, an adjustment plate and a plurality of pull rods, the rear side of the adjustment plate contacts the rear side of the inner wall of the shell, the rear side of the limit plate is fixedly connected to the front side of the adjustment plate, the rear side of the pull rod is fixedly connected to the front side of the adjustment plate, the top of the adjustment plate is rotatably connected to a threaded column, and the rear side of the top of the shell is fixedly connected to a fixing plate.

[0004] In this patent, when the membrane body is treating sewage, impurities will accumulate in the concave part of the membrane body, which will cause the membrane body to be blocked more seriously and affect the sewage treatment effect. Summary of the Invention

[0005] The main purpose of the present invention is to provide a MOBR membrane bioreactor for wastewater treatment, which cleans the membranes on both sides of the rectangular frame through exhaust pipes and isolates impurities through horizontal sealing plates, thereby ensuring the treatment effect of the membrane on wastewater.

[0006] To achieve the above-mentioned purpose, the present invention provides a MOBR membrane bioreactor for wastewater treatment, comprising a treatment box, a rectangular frame, a cleaning mechanism, an air supply mechanism and a sewage discharge mechanism; the treatment box is convex in shape, and the outer walls on both sides above the treatment box are respectively provided with a first water inlet pipe and a first drainage pipe at diagonals; there are multiple rectangular frames, and the multiple rectangular frames are vertically arranged above the interior of the treatment box; both end openings of each rectangular frame are provided with a membrane body; there are multiple groups of cleaning mechanisms, and the cleaning mechanisms are arranged inside the corresponding rectangular frames and are used to clean the membrane body; a strip through groove is provided above each rectangular frame, and the cleaning mechanism includes a strip box slidably arranged in the corresponding strip through groove, and the strip box can move back and forth in the vertical direction; a plurality of connecting strip boxes are equidistantly provided at the lower end of the strip box The exhaust pipe at the top is provided with a plurality of exhaust holes in the circumferential direction of the axis, and a plurality of sleeves are equidistantly provided inside the rectangular frame. The exhaust pipe is located inside the corresponding sleeve, and each sleeve is circumferentially provided with a plurality of closed air holes cooperating with the exhaust holes in the circumferential direction of the axis; the air supply mechanism is provided at the top of the processing box and is used to input gas into the plurality of strip boxes; the sewage discharge mechanism is provided at the bottom of the processing box and is used to seal and open the gaps between adjacent rectangular frames and between the rectangular frame and the inner wall of the processing box; the closing mechanism includes a plurality of horizontal sealing plates equidistantly slidably arranged inside the processing box, and the plurality of horizontal sealing plates can move back and forth in the vertical direction and are sequentially arranged between the processing box and the plurality of rectangular frames; a sewage discharge pipe is provided on the outer wall of the lower end of the processing box, and a one-way valve is provided on the sewage discharge pipe.

[0007] Preferably, a strip-shaped accommodating cavity is provided at the lower end of each rectangular frame, and a plurality of sliding holes for accommodating the exhaust pipe are provided on the accommodating cavity. The lower end of the exhaust pipe extends into the strip-shaped accommodating cavity through the corresponding sliding holes, and a plurality of V-shaped exhaust pipes connecting the strip-shaped accommodating cavity are provided on both sides of the lower end of the rectangular frame along the length direction.

[0008] Preferably, an L-shaped connecting plate is provided on the upper end of each bar box, two hydraulic rods are mirror-imaged on the top of the processing box, a connecting bar is provided between the two hydraulic rods, and the connecting bar is interconnected with multiple L-shaped connecting plates.

[0009] Preferably, the air supply mechanism includes a connecting tube and a telescopic tube; a telescopic tube connecting to the interior of each strip box is provided at the center of the top of each strip box, and multiple telescopic tubes are interconnected through the connecting tube. Both ends of the connecting tube are blocked and are provided on the top of the processing box through fixing parts, and an air inlet pipe is provided at the center of the connecting tube.

[0010] Preferably, the sewage discharge mechanism also includes a rotating shaft and a drive motor; the rotating shaft is rotatably arranged inside the processing box and is located below multiple horizontal sealing plates, and multiple interference blocks that cooperate with the horizontal sealing plates are equidistantly arranged on the rotating shaft; the outer wall of the processing box is also provided with a drive motor for driving the rotating shaft to rotate.

[0011] Preferably, a second water inlet pipe and a second drain pipe are diagonally provided on the outer walls on both sides above the processing box, and solenoid valves are provided on the first drain pipe and the second drain pipe.

[0012] Preferably, each horizontal sealing plate is further provided with a triangular guide portion.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present application uses the cooperation of multiple rectangular frames to filter and adsorb wastewater multiple times, and through the cooperation of the exhaust pipe and the horizontal sealing plate, by opening the exhaust holes on the exhaust pipe, the membrane bodies on both sides of the rectangular frame are impacted from the inside of the rectangular frame to clean the impurities remaining on the surface; and through the movement of the horizontal sealing plate, the impurities can fall to the area below the processing box and be discharged through the sewage pipe, thereby avoiding the accumulation of impurities and causing clogging of the membrane body; and improving the service life of the membrane body.

[0015] 2. The present application provides a first water inlet pipe and a second water inlet pipe on both sides of the processing box, thereby changing the flow direction of the wastewater, so that the membrane bodies on the rectangular frames at both ends inside the processing box can be fully utilized, avoiding different degrees of use of the membrane bodies in the processing box; not only can the treatment effect be improved, but also the flow of wastewater can be used to perform secondary impact cleaning on the membrane body, thereby increasing the service life of the membrane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention and to make other features, objects, and advantages of the present invention more apparent. The accompanying drawings and descriptions of the exemplary embodiments of the present invention are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 is a perspective view of the present invention;

[0018] Figure 2 is a side view of the present invention;

[0019] Figure 3 yes Figure 2 Plane cross-sectional view along AA direction;

[0020] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0021] Figure 5 It is a partial stereogram of the present invention;

[0022] Figure 6 It is a partial three-dimensional exploded view of the present invention.

[0023] The numbers in the above figure are:

[0024] 1-processing box; 11-first water inlet pipe; 12-first drain pipe; 13-drain pipe; 131-one-way valve; 14-hydraulic rod; 15-connecting bar; 16-second water inlet pipe; 17-second drain pipe; 18-solenoid valve;

[0025] 2- rectangular frame; 21- membrane body; 22- strip-shaped through groove; 23- sleeve; 231- air-blocking hole; 24- strip-shaped accommodating cavity; 25- sliding hole; 26- V-shaped outlet pipe;

[0026] 3-cleaning mechanism; 31-bar box; 32-exhaust cylinder; 321-exhaust hole; 33-L-shaped connecting plate;

[0027] 4-air supply mechanism; 41-connecting pipe; 42-telescopic pipe; 43-fixing member; 44-intake pipe;

[0028] 5-sewage discharge mechanism; 51-horizontal blocking plate; 511-triangular guide portion; 52-rotating shaft; 53-resistance block; 54-driving motor. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 efforts should fall within the scope of protection of the present invention.

[0030] See also Figures 1 to 6As shown, a MOBR membrane bioreactor for wastewater treatment includes a treatment box 1, a rectangular frame 2, a cleaning mechanism 3, an air supply mechanism 4 and a sewage discharge mechanism 5; the treatment box 1 is convex in shape, and the outer walls on both sides above the treatment box 1 are diagonally provided with a first water inlet pipe 11 and a first drain pipe 12 respectively; there are multiple rectangular frames 2, and multiple rectangular frames 2 are vertically arranged above the interior of the treatment box 1; each rectangular frame 2 has a membrane body 21 at both end openings; there are multiple groups of cleaning mechanisms 3, and the cleaning mechanisms 3 are arranged inside the corresponding rectangular frames 2 and are used to clean the membrane body 21; a strip through groove 22 is provided above each rectangular frame 2, and the cleaning mechanism 3 includes a strip box 31 slidably arranged in the corresponding strip through groove 22, and the strip box 31 can move back and forth in the vertical direction; a plurality of exhaust pipes 32 connected to the interior of the strip box 31 are equidistantly provided at the lower end of the strip box 31, each The exhaust pipe 32 is circumferentially provided with a plurality of exhaust holes 321 along the axial direction, and a plurality of sleeves 23 are equidistantly provided inside the rectangular frame 2. The exhaust pipe 32 is located inside the corresponding sleeve 23, and each sleeve 23 is circumferentially provided with a plurality of closed air holes 231 cooperating with the exhaust holes 321 along the axial direction; the air supply mechanism 4 is arranged at the top of the processing box 1 and is used to input gas into the plurality of strip boxes 31; the sewage discharge mechanism 5 is arranged at the bottom inside the processing box 1 and is used to seal and open the gaps between adjacent rectangular frames 2 and between the rectangular frame 2 and the inner wall of the processing box 1; the closing mechanism includes a plurality of horizontal sealing plates 51 equidistantly slidably arranged inside the processing box 1, and the plurality of horizontal sealing plates 51 can move back and forth in the vertical direction and are sequentially arranged between the processing box 1 and the plurality of rectangular frames 2; a sewage discharge pipe 13 is provided on the outer wall of the lower end of the processing box 1, and a one-way valve 131 is provided on the sewage discharge pipe 13.

[0031] In order for the MBR membrane to produce water, it must ensure sufficient membrane flux, that is, the pores on the membrane cannot be blocked. However, impurities in the wastewater will be adsorbed to the membrane surface during the filtration process, causing membrane clogging; MABR directly supplies oxygen to the biofilm attached to the membrane surface through breathable membrane materials (such as hollow fiber membranes), while the sewage flows outside the membrane. Microorganisms form a biofilm on the membrane surface, degrading organic pollutants in the water and achieving efficient nitrogen and phosphorus removal; the MABR membrane is an alternating arrangement of MBR and MABR membrane fibers, which can not only achieve membrane water outlet, but also the aeration of the MABR membrane fibers can efficiently flush the surface of the MBR membrane fibers, achieving precise membrane cleaning, delaying membrane fouling, and increasing membrane flux. At the same time, the lower dissolved oxygen has less impact on the activated sludge; the present invention transports wastewater to the inside of the treatment box 1 through the first water inlet pipe 11, and multiple horizontal sealing plates 51 are sequentially located between the multiple rectangular frames 2 and the inner wall of the treatment box 1. The treatment box 1 is convex in shape, so that the interior of the treatment box is divided into upper and lower areas by the multiple horizontal sealing plates 51 and the multiple rectangular frames 2; the upper area is used to treat the wastewater, and the lower area is used to collect the treated impurities. The wastewater can be processed in turn from the upper area through the membrane bodies 21 on both sides of the multiple rectangular frames 2. At this time, the treated wastewater is discharged from the treatment box 1 through the first drain pipe 12, thereby realizing the treatment of the wastewater; during the wastewater treatment process, the closed air holes 231 on the sleeve 23 are staggered with the exhaust holes 321 on the corresponding exhaust pipe 32, so that the exhaust holes 321 on the exhaust pipe 32 can be blocked, thereby avoiding the impurities adsorbed on the membrane body 21 from mixing with the treated wastewater, causing secondary pollution; after a period of treatment, The filter element 32 is a kind of filter element which is widely used in the industry, and the filter element 32 is a kind of filter element which is widely used in the industry.

[0032] See also Figure 3 and Figure 4As shown, a strip-shaped accommodating cavity 24 is provided at the lower end of each rectangular frame 2, and a plurality of sliding holes 25 for accommodating the exhaust pipe 32 are provided on the accommodating cavity. The lower end of the exhaust pipe 32 extends into the strip-shaped accommodating cavity 24 through the corresponding sliding holes 25, and a plurality of V-shaped exhaust pipes 26 connecting to the strip-shaped accommodating cavity 24 are provided on both sides of the lower end of the rectangular frame 2 along the length direction.

[0033] The exhaust pipe 32 is provided with a strip accommodating chamber 24 at the lower end of the rectangular frame 2, and the exhaust pipe 32 is extended into the corresponding strip accommodating chamber 24 through the sliding hole 25. At this time, the exhaust hole 321 in the lower end area of ​​the exhaust pipe 32 is connected to the strip accommodating chamber 24. At this time, the gas is transported into the strip box 31 by the air supply mechanism 4, and the gas enters the strip accommodating chamber 24 through the exhaust hole 321 in the lower end area of ​​the exhaust pipe 32, and aerates the wastewater inside the treatment box through the V-shaped air outlet pipe 26 on both sides of the rectangular frame 2, thereby improving the treatment effect of the membrane body 21 on the wastewater; when it is necessary to clean the membrane body 21 and the impurities in the treatment box, the exhaust pipe 32 is moved so that the lower end of the exhaust pipe 32 is flush with the upper plane inside the strip accommodating chamber 24. At this time, the gas cannot enter the strip accommodating chamber 24, and the gas impacts the membrane body 21 through the exhaust hole 321 and the air closing hole 231 on the exhaust pipe 32 and the sleeve 23, thereby cleaning the membrane body 21.

[0034] See also Figure 2 、 Figure 5 and Figure 6 As shown, an L-shaped connecting plate 33 is provided on the upper end of each bar box 31, and two hydraulic rods 14 are mirror-imaged on the top of the processing box 1. A connecting bar 15 is provided between the two hydraulic rods 14, and the connecting bar 15 is interconnected with multiple L-shaped connecting plates 33.

[0035] After the wastewater is treated for a period of time, the two hydraulic rods 14 are driven synchronously to enable the multiple strip boxes 31 to move back and forth in the vertical direction. During this process, the exhaust holes 321 on the exhaust pipe 32 and the air-closing holes 231 on the corresponding sleeve 23 can be staggered or coaxially arranged, so that the gas in the strip box 31 can be discharged through the exhaust holes 321, and impact the membrane bodies 21 on both sides of the rectangular frame 2 from the inside of the rectangular frame 2, thereby cleaning the impurities remaining on the surface of the membrane body 21, and improving the wastewater treatment effect of the membrane body 21.

[0036] See also Figures 1 to 3 As shown, the air supply mechanism 4 includes a connecting pipe 41 and a telescopic pipe 42; a telescopic pipe 42 connecting to the interior of the strip box 31 is provided at the top center of each strip box 31, and multiple telescopic pipes 42 are interconnected through the connecting pipe 41. Both ends of the connecting pipe 41 are blocked and are set on the top of the processing box through a fixing part 43. An air intake pipe 44 is provided at the center of the connecting pipe 41.

[0037] The air inlet pipe 44 is connected to an external air source, so that the gas can enter the connecting pipe 41 through the air inlet pipe 44, and then enter the corresponding box through the telescopic tube 42. Secondly, when the box 31 moves in the vertical direction, the telescopic tube 42 can cooperate with the movement of the box 31, thereby ensuring that the gas can impact the membrane body 21.

[0038] See also Figure 1 、 Figures 4 to 6 As shown, the sewage discharge mechanism 5 also includes a rotating shaft 52 and a driving motor 54; the rotating shaft 52 is rotatably arranged inside the processing box 1 and is located below multiple horizontal sealing plates 51, and multiple interference blocks 53 that cooperate with the horizontal sealing plates 51 are equidistantly arranged on the rotating shaft 52; the outer wall of the processing box 1 is also provided with a driving motor 54 for driving the rotating shaft 52 to rotate.

[0039] The interference block 53 on the rotating shaft 52 can contact the corresponding horizontal sealing plate 51, so that the multiple horizontal sealing plates 51 are in the same horizontal plane; the multiple horizontal sealing plates 51 can cooperate with the corresponding rectangular frame 2, so as to divide the processing box 1 into upper and lower layers. When impurities need to be cleaned, the rotating shaft 52 is driven by the driving motor 54 to rotate, so that the interference block 53 is separated from the corresponding horizontal sealing plate 51. At this time, the impurities can be deposited in the lower area of ​​the processing box 1. Subsequently, the driving shaft is rotated to reset the horizontal sealing plate 51, thereby isolating the upper and lower areas of the processing box 1, and treating the sludge through the sewage pipe 13, so as to avoid excessive impurities during wastewater treatment, which may cause blockage of the membrane body 21.

[0040] See also Figure 1 and Figure 3 As shown, a second water inlet pipe 16 and a second drain pipe 17 are provided diagonally on the outer walls on both sides of the upper side of the processing box 1 , and a solenoid valve 18 is provided on both the first drain pipe 12 and the second drain pipe 17 .

[0041] Due to the long-term one-way flow of wastewater, the degree of use of the membrane body 21 set in the processing box 1 will be different, and the membrane body 21 close to the first drain pipe 12 will be cleaner. Based on this situation, the second water inlet pipe 16 and the second drain pipe 17 are set to change the flow direction of the wastewater, and the membrane body 21 close to the first drain pipe 12 can be fully utilized, which not only improves the treatment effect; but also can use the flow of wastewater to perform secondary impact cleaning on the membrane body 21, thereby increasing the service life of the membrane body 21.

[0042] See also Figure 4 As shown, each horizontal blocking plate 51 is further provided with a triangular guide portion 511 .

[0043] The triangular guide portion 511 is provided to prevent impurities from accumulating on the horizontal blocking plate 51 and ensure that the impurities can enter the bottom of the processing box 1.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A MOBR membrane bioreactor for wastewater treatment, characterized in that: It includes a processing box, a rectangular frame, a cleaning mechanism, an air supply mechanism and a sewage discharge mechanism; The processing box is convex in shape, and the outer walls on both sides above the processing box are respectively provided with a first water inlet pipe and a first drain pipe at diagonal angles; there are multiple rectangular frames, and the multiple rectangular frames are vertically arranged above the interior of the processing box; each of the two end openings of the rectangular frame is provided with a membrane body; There are multiple groups of cleaning mechanisms, which are arranged inside corresponding rectangular frames and are used to clean the membrane body; a strip-shaped through-groove is provided above each rectangular frame, and the cleaning mechanism includes a strip box slidably provided in the corresponding strip-shaped through-groove, and the strip box can move back and forth in the vertical direction; a plurality of exhaust pipes connected to the interior of the strip box are equidistantly provided at the lower end of the strip box, and each exhaust pipe is circumferentially provided with a plurality of exhaust holes along the axial direction; a plurality of sleeves are equidistantly provided inside the rectangular frame, and the exhaust pipes are located inside the corresponding sleeves, and each sleeve is circumferentially provided with a plurality of closed air holes that cooperate with the exhaust holes along the axial direction; The gas supply mechanism is arranged on the top of the processing box and is used to supply gas into the plurality of strip boxes; The sewage discharge mechanism is arranged at the lower part of the processing box and is used to seal and open the gaps between adjacent rectangular frames and between the rectangular frames and the inner wall of the processing box; the closing mechanism includes a plurality of horizontal sealing plates equidistantly slidably arranged inside the processing box, and the plurality of horizontal sealing plates are capable of moving back and forth in the vertical direction and are arranged in sequence between the processing box and the plurality of rectangular frames; a sewage discharge pipe is provided on the outer wall of the lower end of the processing box, and a one-way valve is provided on the sewage discharge pipe.

2. A MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, A strip-shaped accommodating cavity is provided at the lower end of each rectangular frame, and a plurality of sliding holes for accommodating the exhaust pipe are provided on the accommodating cavity. The lower end of the exhaust pipe extends into the strip-shaped accommodating cavity through the corresponding sliding holes. A plurality of V-shaped exhaust pipes connecting the strip-shaped accommodating cavity are provided on both sides of the lower end of the rectangular frame along the length direction.

3. A MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, An L-shaped connecting plate is provided on the upper end of each bar box, and two hydraulic rods are mirror-imaged on the top of the processing box. A connecting strip is provided between the two hydraulic rods, and the connecting strip is connected to multiple L-shaped connecting plates.

4. A MOBR membrane bioreactor for wastewater treatment according to claim 3, characterized in that, The air supply mechanism includes a connecting pipe and a telescopic pipe; A telescopic tube connected to the interior of each bar box is provided at the center of the top of each bar box. Multiple telescopic tubes are connected to each other through a connecting tube. Both ends of the connecting tube are blocked and are set on the top of the processing box through a fixing piece. An air inlet pipe is provided at the center of the connecting tube.

5. A MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, The sewage discharge mechanism also includes a rotating shaft and a driving motor; The rotating shaft is rotatably arranged inside the processing box and is located below multiple horizontal sealing plates. Multiple interference blocks that cooperate with the horizontal sealing plates are equidistantly arranged on the rotating shaft; a driving motor for driving the rotating shaft to rotate is also arranged on the outer wall of the processing box.

6. A MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that: A second water inlet pipe and a second drain pipe are diagonally arranged on the outer walls on both sides above the processing box, and electromagnetic valves are arranged on the first drain pipe and the second drain pipe.

7. A MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that: Each horizontal blocking plate is also provided with a triangular guide portion.

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