Filter equipment with filter membrane for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to sewage treatment filter equipment with a filter membrane, which comprises a mixing tank, a filter tank, a clean water tank, a header pipe and a filter membrane body, and a first delivery pump is bolted at the top between the mixing tank and the filter tank; the first motor is started to drive the transmission column, the vertical cylinder and the barrel body to rotate, sewage and a flocculating agent enter the rotating barrel body and form relative movement with the stationary stirring rod and the vertical rod, premixing and stirring of the flocculating agent and the sewage are implemented, and then the flocculating agent and the sewage are discharged into a mixing tank through the discharging pipe doing circular motion. An annular feeding point is formed, the flocculant is prevented from being intensively fed at several points, the discharging pipe drives the stirring blades to rotate, and the flocculant and the sewage are uniformly mixed, so that the situation that the flocculant is not uniformly distributed locally in the mixing tank is avoided, the flocculant and the sewage are mixed more uniformly, and the sewage is treated more sufficiently.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically to a sewage treatment filtering device with a filter membrane. Background Art

[0002] The MBR filter membrane is an efficient sewage treatment process that combines biological treatment and membrane separation technologies. Its core is to intercept suspended solids, microorganisms, and colloidal substances in sewage through ultrafiltration (UF) or microfiltration (MF) membranes. At the same time, microorganisms are used to degrade organic matter. Sewage enters the bioreactor, and microorganisms decompose organic matter. The mixed liquid (sewage + activated sludge) is filtered through the MBR membrane, and clear water passes through the membrane pores into the water production pipe. Pollutants are retained in the reactor. With aeration at the bottom of the filter tank, regular backwashing or chemical cleaning is carried out to maintain the membrane flux. Although the MBR membrane itself can treat sewage through physical interception and biological degradation, under the following special water quality conditions, flocculants (such as PAC, PAM) need to be added to optimize the treatment effect. For example, for construction wastewater (containing sediment), sand washing wastewater, and food processing wastewater (containing starch particles), the flocculant aggregates fine suspended solids into large flocs to avoid directly blocking the membrane pores and reducing the membrane fouling rate. For printing and dyeing wastewater (containing dye colloids), oily wastewater (emulsified oil), and chemical industrial wastewater (colloidal silicon), flocculants are added to neutralize the colloidal charge, break the emulsified state, and promote the aggregation of pollutants into clusters for easy membrane interception. After the sewage is added with and mixed with the flocculant, it enters the filter tank. After being filtered by the MBR filter membrane, it is pumped into the clear water tank for subsequent disinfection and other operations to achieve multi-stage treatment of the sewage.

[0003] However, during the process of adding the flocculant into the mixing tank, the flocculant is only added through several fixed points. The concentration of the flocculant is too high near the dosing points, and the concentration of the flocculant is insufficient in the area far from the dosing points. Therefore, it is easy to cause uneven mixing, resulting in large differences in the size of the flocs. The unreacted flocculant cannot form dense flocs, and the sedimentation performance is poor. It may suspend in the water and block the membrane pores. The unflocculated fine particles and colloidal substances directly contact the membrane surface, accelerating the blockage of the membrane pores and the formation of the filter cake layer. At the same time, during aeration, the filter membrane swings randomly under the influence of bubbles. Although it can get rid of the attached dirt on the surface, there is insufficient aeration in some local areas of the membrane surface, aggravating the pollution. The random swing reduces the aeration efficiency, and a higher air volume is required to maintain the scouring effect. Moreover, large particles of impurities are easy to enter the interior of the filter tank. The large particles directly block the membrane pores (especially hollow fiber membranes), resulting in a decrease in the membrane flux. Harder particles (such as gravel) scratch the membrane surface under the scouring of aeration, shortening the membrane life. The particles accumulate at the bottom of the membrane tank, forming a dead sludge area, aggravating the anaerobic reaction and releasing odors. Summary of the Invention

[0004] The object of the present invention is to provide a filtering device for sewage treatment with a filter membrane, which can perform premixing and pre-stirring during the process of sewage and flocculant feeding. At the same time, during the process of sewage and flocculant entering the pool, a ring is formed through the feeding position, so that the feeding of the flocculant is more uniform, and stirring is carried out in the pool, so that the flocculant and sewage are mixed more evenly, and the sewage treatment is more sufficient.

[0005] To achieve the above object, the present invention provides the following technical solutions: A filtering device for sewage treatment with a filter membrane, including a mixing tank, a filtering tank, a clear water tank, a main pipe and a filter membrane body. A first delivery pump is bolted to the top between the mixing tank and the filtering tank. The inlet end of the first delivery pump is connected with an inlet pipe, and the outlet end of the first delivery pump is connected with a discharge pipe. It further includes: A support plate bolted to one side of the top of the mixing tank. A box body is bolted to the top of the support plate. A barrel is arranged on one side of the box body. A feeding pipe is connected to the lower side of the surface of the barrel. A vertical cylinder is also connected to the top of the barrel. The extending end of the main pipe is fixed to the inside of the vertical cylinder through a bearing; A third delivery pump bolted inside the box body. The outlet end of the third delivery pump is connected with a first connecting pipe, and one end of the first connecting pipe penetrates and extends into the inside of the main pipe. The inlet end of the third delivery pump is connected with a second connecting pipe, and one end of the second connecting pipe penetrates to the outside of the box body; An inner frame fixed inside the filtering tank. A fixing frame is arranged above the inner frame. A plurality of auxiliary frames are bolted to the bottom of the fixing frame, and the filter membrane body is located inside the auxiliary frames; A feeding and stirring mechanism for feeding flocculant; A preliminary filtering mechanism for blocking large-particle impurities; A reciprocating driving mechanism for driving the auxiliary frame to swing back and forth.

[0006] Preferably, the feeding and stirring mechanism includes a first motor, a transmission column and a vertical column. The first motor is bolted to one side inside the box body. The transmission column penetrates the box body and is rotatably connected to the surface of the support plate. The vertical column is bolted inside the mixing tank. The top of the vertical column is rotatably connected with a turntable, and the bottom of the barrel is fixed to the turntable. A vertical rod is bolted to the top of the vertical column. The vertical rod penetrates the barrel and is rotatably connected to the penetration part. A plurality of stirring rods are bolted to the surface of the vertical rod and inside the barrel. A plurality of stirring blades are also bolted to the lower side of the surface of the feeding pipe. The output shaft of the first motor is connected to the transmission column through a gear transmission, and the vertical column and the transmission column are connected through a belt transmission.

[0007] Preferably, the bottom inside the barrel is designed to be inclined.

[0008] Preferably, the preliminary filtration mechanism includes a second motor, a cross bar, and a vertical rotating rod. A support is also bolted to the top between the mixing tank and the filtration tank. The top of the support is bolted with a housing. The second motor is bolted inside the housing. The cross bar is fixed to the output shaft of the second motor. The other end of the cross bar is rotatably connected to the inner wall of the housing. The vertical rotating rod passes through the support and is rotatably connected to the penetration part. The vertical rotating rod and the cross bar are connected by bevel gears. A metal mesh barrel is bolted to the bottom end of the vertical rotating rod. The end of the discharge pipe away from the second delivery pump extends above the metal mesh barrel.

[0009] Preferably, the preliminary filtration mechanism further includes a sewage suction pump bolted to one side of the top of the filtration tank. The inlet end of the sewage suction pump is connected with a sewage suction pipe. A cover body is connected to the surface of the sewage suction pipe and is located inside the metal mesh barrel. The outlet end of the sewage suction pipe is connected with a discharge pipe.

[0010] Preferably, the reciprocating drive mechanism includes a vertical plate, a long rod, and a transmission gear. A plurality of cross beams are also bolted to the upper part of the inner wall of the filtration tank. The vertical plate is bolted to the top of the cross beam. The long rod is rotatably connected to the vertical plate. The number of transmission gears is several and they are bolted to the surface of the long rod. A support column is bolted to the top of the fixed frame. The top end of the support column is bolted with a movable rod. A fixed rod is also bolted to the top of the cross beam. One end of the fixed rod is bolted with a sliding sleeve, and the movable rod is slidably connected to the inner wall of the sliding sleeve. A rack is bolted to the top end of the movable rod, and the transmission gear meshes with the rack. The reciprocating drive mechanism further includes a first half gear and a first spur gear bolted to the surface of the vertical rotating rod. A transmission rod and a transmission shaft are also rotatably connected to the inner wall of the housing. A second half gear and a second spur gear are respectively fixed to the surface of the transmission rod, and the first spur gear meshes with the second spur gear. A driven gear is bolted to the surface of the transmission shaft. A driven gear is fixed to the surface of the transmission shaft. The driven gear and the first half gear are at the same height. The bottom end of the transmission shaft is connected to the long rod by bevel gears.

[0011] Preferably, the cross section of the movable rod is designed to be square, and the inner wall of the sliding sleeve is designed to be square.

[0012] Preferably, the teeth on the surface of the first half gear are designed in a semi-circular shape, and the teeth on the surface of the second half gear are designed in a semi-circular shape.

[0013] Preferably, a second delivery pump is bolted to the top of the filtration tank and the clear water tank.

[0014] Preferably, the auxiliary frame is designed in a folded line shape.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the first motor is started to drive the transmission column, the vertical cylinder and the barrel to rotate. Sewage and flocculant enter the rotating barrel, forming relative movement with the stationary stirring rod and vertical rod, implementing premixing and stirring of the flocculant and sewage, and then being discharged into the mixing tank through the feeding pipe moving in a circular motion, forming an annular feeding point to avoid concentrated feeding of the flocculant at several points. The feeding pipe drives the stirring blades to rotate, realizing uniform mixing of the flocculant and sewage, thus avoiding uneven distribution of the flocculant in the mixing tank locally, making the mixing of the flocculant and sewage more uniform, treating the sewage more fully, reducing the generation of unflocculated fine particles and colloidal substances, and reducing the possibility of clogging the membrane itself.

[0016] By starting the second motor to drive the cross bar and the vertical rotating rod to rotate, thereby driving the metal mesh barrel to rotate, implementing preliminary filtration of the sewage entering the inside of the filtration tank to prevent the entry of large particle impurities, and cooperating with the use of a sewage suction pump to discharge the impurities accumulated inside the metal mesh barrel to ensure the smoothness of the metal mesh barrel. The feeding and mixing of the flocculant inside the mixing tank, combined with the preliminary filtration of the metal mesh barrel and the filtration effect of the filter membrane body itself, are used to achieve multi-stage filtration treatment of the sewage.

[0017] During the rotation of the vertical rotating rod, by cooperating with the use of the first half gear, the second half gear, the transmission rod and the transmission shaft, the long rod is driven to rotate forward and backward alternately, and the rack, the movable rod, the support column, the fixed frame and the auxiliary frame are driven to swing back and forth through the transmission gear, and the filter membrane body is made to swing back and forth orderly, which is superimposed on the scouring action of the aeration bubbles, more efficiently peeling off the pollutants attached to the membrane surface. The reciprocating swing dynamically adjusts the position of the membrane, making different areas of the membrane surface alternately exposed to high-intensity aeration scouring, reducing dead zones and avoiding local pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is the sectional structural schematic diagram of the mixing tank and the filtration tank of the present invention; Figure 3 is the sectional structural schematic diagram of the box body of the present invention; Figure 4 is the sectional structural schematic diagram of the barrel of the present invention; Figure 5 is the structural schematic diagram of the barrel and the transmission column of the present invention; Figure 6 is the sectional view of the housing of the present invention; Figure 7 is the partial structural schematic diagram of the reciprocating drive mechanism of the present invention; Figure 8 is the schematic diagram of the first half gear and the second half gear of the present invention; Figure 9 It is a schematic structural diagram of the inner frame and its inside and outside in the present invention; Figure 10 It is a schematic structural diagram of the fixing frame and the auxiliary frame in the present invention; Figure 11 It is a schematic structural diagram of the sewage suction pipe and the cover body in the present invention; Figure 12 It is a schematic structural diagram of the auxiliary frame in the present invention.

[0019] In the figure: 1, mixing tank; 2, filtering tank; 3, clear water tank; 4, main pipe; 5, first delivery pump; 6, second delivery pump; 7, filter membrane body; 8, box body; 9, support plate; 10, barrel body; 11, blanking pipe; 12, inlet pipe; 13, discharge pipe; 14, vertical cylinder; 15, third delivery pump; 16, first connecting pipe; 17, second connecting pipe; 18, fixing frame; 19, auxiliary frame; 20, feeding and stirring mechanism; 201, first motor; 202, transmission column; 203, column; 204, turntable; 205, vertical rod; 206, stirring rod; 207, stirring blade; 21, housing; 22, support; 23, preliminary filtering mechanism; 231, second motor; 232, cross bar; 233, vertical rotating rod; 234, metal mesh barrel; 235, sewage suction pipe; 236, sewage suction pump; 237, discharge pipe; 238, cover body; 24, cross beam; 25, reciprocating driving mechanism; 251, vertical plate; 252, long rod; 253, driving gear; 254, rack; 255, fixing rod; 256, sliding sleeve; 257, movable rod; 258, support column; 259, transmission rod; 2510, transmission shaft; 2511, first half gear; 2512, second half gear; 2513, first straight gear; 2514, second straight gear; 2515, driven gear; 26, inner frame. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-12, A sewage treatment filtration device with a filter membrane, including a mixing tank 1, a filtration tank 2, a clear water tank 3, a main pipe 4, and a filter membrane body 7. The main pipe 4 is used for the entry of sewage. A first delivery pump 5 is bolted to the top between the mixing tank 1 and the filtration tank 2. The inlet end of the first delivery pump 5 is connected and provided with an inlet pipe 12, and the outlet end of the first delivery pump 5 is connected and provided with a discharge pipe 13. One end of the inlet pipe 12 extends into the mixing tank 1. A second delivery pump 6 is bolted to the top between the filtration tank 2 and the clear water tank 3. The pipe externally connected to the filter membrane body 7, that is, the MBR membrane module, and the pipe connecting the MBR membrane module to the suction pump (the second delivery pump 6 mentioned in this text) is usually called the product water pipe or the suction pipe. Through negative pressure suction, the clear water permeate after membrane filtration is transported to the clear water tank 3. The suction pipe externally connected to the filter membrane body 7 is interconnected with the second delivery pump 6 (not the focus of this invention, it is prior art, and the pipeline diagram is not shown in detail in the figure). This device also includes a dosing and stirring mechanism 20, a preliminary filtration mechanism 23, and a reciprocating drive mechanism 25. A support plate 9 is bolted to one side of the top of the mixing tank 1. A box body 8 is bolted to the top of the support plate 9. A barrel 10 is arranged on one side of the box body 8. A feed pipe 11 is connected and provided on one side below the surface of the barrel 10. A vertical cylinder 14 is also connected and provided at the top of the barrel 10. The main pipe 4 passes through the box body 8 and one end of it extends into the interior of the vertical cylinder 14. One end of the main pipe 4 extending into the interior of the vertical cylinder 14 is fixed to the interior of the vertical cylinder 14 through a bearing, enabling the surfaces of the vertical cylinder 14 and the main pipe 4 to rotate. A third delivery pump 15 is bolted to the interior of the box body 8. The outlet end of the third delivery pump 15 is connected and provided with a first connecting pipe 16, and one end of the first connecting pipe 16 passes through and extends into the interior of the main pipe 4. The inlet end of the third delivery pump 15 is connected and provided with a second connecting pipe 17. The end of the second connecting pipe 17 away from the third delivery pump 15 penetrates to the outside of the box body 8. The second connecting pipe 17 is connected to an external medicine box or inlet containing flocculant (not shown in the figure). The third delivery pump 15 is a metering pump. The staff pours the prepared flocculant into the medicine box or inlet externally connected to the second connecting pipe 17, and then starts the third delivery pump 15 to implement the delivery of the flocculant. An inner frame 26 is fixed to the interior of the filtration tank 2, and the filter membrane body 7 is located inside the inner frame 26. The aeration pipe is installed below the interior of the inner frame 26 during actual use. A fixing frame 18 is arranged above the inner frame 26. A number of auxiliary frames 19 are bolted to the bottom of the fixing frame 18, and the filter membrane body 7 is located inside the auxiliary frames 19. The auxiliary frames 19 are designed with a slightly zigzag shape, so that the filter membrane body 7 wrapped by the auxiliary frames 19 is slightly bent.

[0022] The feeding and stirring mechanism 20 includes a first motor 201, a transmission column 202 and a vertical column 203. The first motor 201 is bolted to one side inside the box body 8. The transmission column 202 penetrates through the box body 8 and is rotatably connected to the surface of the support plate 9. The vertical column 203 is bolted to the inside of the mixing tank 1. The top end of the vertical column 203 is rotatably connected to a turntable 204. The vertical column 203 penetrates through the turntable 204 and is fixedly connected to the penetration part of the turntable 204 through a bearing to achieve a rotational connection. Moreover, the bottom of the barrel body 10 is fixedly connected to the turntable 204. The top end of the vertical column 203 is bolted with a vertical rod 205. The vertical rod 205 penetrates through the barrel body 10 and is rotatably connected to its penetration part. A plurality of stirring rods 206 are bolted to the surface of the vertical rod 205 and inside the barrel body 10. A plurality of stirring blades 207 are also bolted to the lower part of the surface of the feeding pipe 11. The output shaft of the first motor 201 is connected to the transmission column 202 through a gear drive. A belt drive is provided between the vertical column 203 and the transmission column 202. When working, first, the sewage is fed through the main pipe 4. At the same time, the third delivery pump 15 and the first motor 201 are started. The third delivery pump 15 enables the flocculant to enter the first connecting pipe 16 through the third delivery pump 15, and then enters the part of the main pipe 4 extending to the vertical cylinder 14. The flocculant is preliminarily mixed with the sewage. At the same time, the first motor 201 is started to drive the transmission column 202 to rotate through a gear drive. Then, the transmission column 202 drives the vertical cylinder 14, the barrel body 10 and the lower turntable 204 to rotate through a belt. The sewage enters the inside of the barrel body 10 and, under the driving action of the barrel body 10, rotates passively. At the same time, combined with the stationary vertical rod 205 and stirring rods 206 below, the sewage and the flocculant are preliminarily stirred. The bottom inside the barrel body 10 is inclined and slopes towards the feeding pipe 11. After the preliminarily mixed sewage passes through the feeding pipe 11, it is discharged into the inside of the mixing tank 1. At the same time, the barrel body 10 drives the feeding pipe 11 and the stirring blades 207 below its surface to perform a circular motion, so that the flocculant is put in a circular motion, preventing the flocculant from being put in the same position. Under the action of the stirring blades 207 in the circular motion, the mixing between the flocculant and the sewage is accelerated, thus avoiding the uneven distribution of the flocculant in the mixing tank 1, making the mixing of the flocculant and the sewage more uniform, treating the sewage more fully, and reducing the generation of unflocculated fine particles and colloidal substances.

[0023] The preliminary filtration mechanism 23 includes a second motor 231, a cross bar 232 and a vertical rotating rod 233. A bracket 22 is also bolted to the top between the mixing tank 1 and the filtration tank 2. A housing 21 is bolted to the top of the bracket 22. The second motor 231 is bolted inside the housing 21. The cross bar 232 is fixed to the output shaft of the second motor 231. The other end of the cross bar 232 is rotatably connected to the inner wall of the housing 21. The vertical rotating rod 233 passes through the bracket 22 and is rotatably connected to the penetrating part thereof, which enables the vertical rotating rod 233 to have the condition of rotation. The vertical rotating rod 233 is connected to the cross bar 232 through bevel gears. A metal mesh barrel 234 is bolted to the bottom end of the vertical rotating rod 233. One end of the discharge pipe 13 far from the second delivery pump 6 extends above the metal mesh barrel 234. The metal mesh barrel 234 is composed of a metal mesh and a frame designed in a barrel shape. After the flocculant and sewage enter the inside of the mixing tank 1 and are stirred, flocs are generated. By turning on the second delivery pump 6, the sewage, flocs and other impurities inside the mixing tank 1 enter above the metal mesh barrel 234 after passing through the inlet pipe 12, the second delivery pump 6 and the discharge pipe 13. Large particle impurities and larger flocs in the sewage are intercepted by the metal mesh barrel 234 and concentrated and accumulated inside the metal mesh barrel 234, avoiding the situation that a large amount of large particle impurities enter the inside of the filtration tank 2 and easily block the membrane pores, resulting in a decrease in the membrane flux.

[0024] The preliminary filtration mechanism 23 further includes a sewage suction pump 236 bolted to one side of the top of the filtration tank 2. The inlet end of the sewage suction pump 236 is connected in a communicating way with a sewage suction pipe 235. A cover body 238 is connected in a communicating way on the surface of the sewage suction pipe 235, and the cover body 238 is located inside the metal mesh barrel 234. The cover body 238 is close to the inside of the metal mesh barrel 234. The outlet end of the sewage suction pipe 235 is connected in a communicating way with a discharge pipe 237. When a large amount of impurities or dirt are concentrated inside the metal mesh barrel 234, the sewage suction pump 236 can be turned on, so that the impurities and dirt inside the metal mesh barrel 234 are discharged to the outside after passing through the cover body 238, the sewage suction pipe 235, the sewage suction pump 236 and the discharge pipe 237, and are collected by the staff. For the sewage entering the inside of the filtration tank 2, by turning on the second delivery pump 6, the water flows towards the inside of the filter membrane body 7. The sewage is filtered through the filter membrane body 7 and is pumped into the inside of the clean water tank 3 by the second delivery pump 6 for subsequent treatment.

[0025] The reciprocating drive mechanism 25 includes a vertical plate 251, a long rod 252 and a transmission gear 253. Above the inner wall of the filter tank 2, a number of cross beams 24 are also bolted. The vertical plate 251 is bolted to the top of the cross beam 24. The long rod 252 is rotatably connected to the vertical plate 251. The number of transmission gears 253 is several and they are bolted to the surface of the long rod 252. A support column 258 is bolted to the top of the fixed frame 18. The top end of the support column 258 is bolted with a movable rod 257. A fixed rod 255 is also bolted to the top of the cross beam 24. One end of the fixed rod 255 is bolted with a sliding sleeve 256, and the movable rod 257 is slidably connected to the inner wall of the sliding sleeve 256. The cross section of the movable rod 257 is square-shaped, and the inner wall of the sliding sleeve 256 is square-shaped. In this way, the movable rod 257 can only reciprocate back and forth on the inner wall of the sliding sleeve 256 and will not rotate and tilt. At the same time, it enables the movable rod 257, the support column 258, the fixed frame 18 and the auxiliary frame 19 to have the condition of reciprocating motion. The top end of the movable rod 257 is bolted with a rack 254, and the transmission gear 253 meshes with the rack 254. The reciprocating drive mechanism 25 further includes a first half gear 2511 and a first spur gear 2513 bolted to the surface of the vertical rotating rod 233. A transmission rod 259 and a transmission shaft 2510 are also rotatably connected to the inner wall of the housing 21. A second half gear 2512 and a second spur gear 2514 are respectively fixed on the surface of the transmission rod 259, and the first spur gear 2513 meshes with the second spur gear 2514. A driven gear 2515 is bolted to the surface of the transmission shaft 2510. The teeth on the surface of the first half gear 2511 are designed in a semi-circular shape, and the teeth on the surface of the second half gear 2512 are designed in a semi-circular shape. The teeth on the surface of the first half gear 2511 and the teeth on the surface of the second half gear 2512 are symmetrically distributed and are not on the same side. A driven gear 2515 is fixed on the surface of the transmission shaft 2510. The driven gear 2515 and the first half gear 2511 are at the same height. The bottom end of the transmission shaft 2510 is connected to the long rod 252 through bevel gear transmission.

[0026] During the process that the vertical rotating rod 233 in the preliminary filtering mechanism 23 drives the metal mesh barrel 234 to rotate and intercepts large-particle impurities, the vertical rotating rod 233 can drive the first half gear 2511 and the first spur gear 2513 to rotate. At the same time, the first spur gear 2513 drives the transmission rod 259 to rotate through the meshing second spur gear 2514, making the rotation directions of the transmission rod 259 opposite. At this time, the first half gear 2511 and the second half gear 2512 rotate in different directions and alternately mesh with the driven gear 2515. For example, during the process that the vertical rotating rod 233 rotates clockwise (taking Figure 7Taking the perspective as an example, the first spur gear 2513 and the first half gear 2511 rotate clockwise, while the transmission rod 259, the second half gear 2512 and the second spur gear 2514 rotate counterclockwise. When the first half gear 2511 meshes with the passive gear 2515, the transmission shaft 2510 and the passive gear 2515 rotate counterclockwise. When the first half gear 2511 rotates to the moment when the teeth disengage from the passive gear 2515, the second half gear 2512 meshes with the passive gear 2515, causing the transmission shaft 2510 to rotate clockwise. Thus, the transmission shaft 2510 can rotate back and forth alternately in the clockwise and counterclockwise directions. The transmission shaft 2510 drives the long rod 252 to rotate back and forth alternately through bevel gears, and drives the transmission gear 253 to rotate back and forth alternately, causing the rack 254 to reciprocate in a short distance on the horizontal plane, driving the lower movable rod 257, support column 258, fixed frame 18 and auxiliary frame 19 to be arranged back and forth in an orderly manner, causing the filter membrane body 7 to swing orderly. Combined with aeration, it can clean the surface of the filter membrane more effectively. The folded MBR membrane combined with the reciprocating swing design, the dynamic swing will directly apply physical shear force to the membrane surface, superimposed with the scouring effect of aeration bubbles, more efficiently stripping the pollutants attached to the membrane surface. Synergistic effect, the turbulence generated by the swing interacts with the upward movement of the bubbles, forming a more complex flow field, further destroying the attachment stability of the dirt. The reciprocating swing dynamically adjusts the position of the membrane, making different areas of the membrane surface alternately exposed to high-intensity aeration scouring, reducing dead zones and avoiding local pollution. During the swing process, the movement of the membrane module changes the rising path of the bubbles, prolonging the residence time of the bubbles on the membrane surface and improving the gas-liquid-solid three-phase contact efficiency.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0028] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filtering device for sewage treatment with a filter membrane, comprising a mixing tank (1), a filtering tank (2), a clear water tank (3), a main pipe (4) and a filter membrane body (7). A first delivery pump (5) is bolted to the top between the mixing tank (1) and the filtering tank (2). An inlet pipe (12) is communicatively connected to the inlet end of the first delivery pump (5), and a discharge pipe (13) is communicatively connected to the outlet end of the first delivery pump (5). It is characterized in that, It also includes: A support plate (9) bolted to one side of the top of the mixing tank (1). A box body (8) is bolted to the top of the support plate (9). A barrel body (10) is arranged on one side of the box body (8). A feeding pipe (11) is communicated and arranged on one side below the surface of the barrel body (10). A vertical cylinder (14) is also communicated and arranged on the top of the barrel body (10). The extending end of the main pipe (4) is fixedly connected to the inside of the vertical cylinder (14) through a bearing. A third delivery pump (15) bolted inside the box body (8). The outlet end of the third delivery pump (15) is communicated and arranged with a first connecting pipe (16), and one end of the first connecting pipe (16) penetrates and extends into the inside of the main pipe (4). The inlet end of the third delivery pump (15) is communicated and arranged with a second connecting pipe (17), and one end of the second connecting pipe (17) penetrates to the outside of the box body (8). An inner frame (26) fixed inside the filtration tank (2). A fixing frame (18) is arranged above the inner frame (26). A plurality of auxiliary frames (19) are bolted to the bottom of the fixing frame (18), and the filter membrane body (7) is located inside the auxiliary frames (19). A feeding and stirring mechanism (20) for feeding a flocculant. A preliminary filtration mechanism (23) for blocking large-particle impurities. A reciprocating driving mechanism (25) for driving the auxiliary frame (19) to swing back and forth.

2. The filtering device for sewage treatment with a filter membrane according to claim 1, wherein: The feeding and stirring mechanism (20) includes a first motor (201), a transmission column (202), and a vertical column (203). The first motor (201) is bolted to one side inside the box body (8). The transmission column (202) penetrates the box body (8) and is rotatably connected to the surface of the support plate (9). The vertical column (203) is bolted inside the mixing tank (1). The top end of the vertical column (203) is rotatably connected to a turntable (204), and the bottom of the barrel body (10) is fixedly connected to the turntable (204). A vertical rod (205) is bolted to the top end of the vertical column (203). The vertical rod (205) penetrates the barrel body (10) and is rotatably connected to the penetrating part thereof. A plurality of stirring rods (206) are bolted to the surface of the vertical rod (205) and inside the barrel body (10). A plurality of stirring blades (207) are also bolted below the surface of the feeding pipe (11). The output shaft of the first motor (201) is connected to the transmission column (202) through a gear. The vertical column (203) and the transmission column (202) are connected through a belt.

3. A sewage treatment filtration device with a filter membrane according to claim 1, characterized in that: The bottom inside the barrel body (10) is designed to be inclined.

4. A filtering device for sewage treatment with a filter membrane according to claim 1, characterized in that: The preliminary filtering mechanism (23) includes a second motor (231), a cross bar (232) and a vertical rotating rod (233). A bracket (22) is also bolted to the top between the mixing tank (1) and the filtering tank (2). A housing (21) is bolted to the top of the bracket (22). The second motor (231) is bolted inside the housing (21). The cross bar (232) is fixed to the output shaft of the second motor (231). The other end of the cross bar (232) is rotatably connected to the inner wall of the housing (21). The vertical rotating rod (233) passes through the bracket (22) and is rotatably connected to the passing-through part. The vertical rotating rod (233) is connected to the cross bar (232) through bevel gears. A metal mesh barrel (234) is bolted to the bottom end of the vertical rotating rod (233). One end of the discharge pipe (13) far from the second delivery pump (6) extends above the metal mesh barrel (234).

5. The filtering device for sewage treatment with a filter membrane according to claim 4, characterized in that: The preliminary filtering mechanism (23) further includes a sewage suction pump (236) bolted to one side of the top of the filtering tank (2). A sewage suction pipe (235) is connected to the inlet end of the sewage suction pump (236) in a communicating way. A cover body (238) is connected to the surface of the sewage suction pipe (235) in a communicating way, and the cover body (238) is located inside the metal mesh barrel (234). A discharge pipe (237) is connected to the outlet end of the sewage suction pipe (235) in a communicating way.

6. The filtering device for sewage treatment with a filter membrane according to claim 4, characterized in that: The reciprocating drive mechanism (25) includes a vertical plate (251), a long rod (252) and a transmission gear (253). Above the inner wall of the filter tank (2), several cross beams (24) are also bolted. The vertical plate (251) is bolted to the top of the cross beam (24). The long rod (252) is rotatably connected to the vertical plate (251). The number of the transmission gears (253) is several and they are bolted to the surface of the long rod (252). A support column (258) is bolted to the top of the fixed frame (18). The top of the support column (258) is bolted with a movable rod (257). A fixed rod (255) is also bolted to the top of the cross beam (24). One end of the fixed rod (255) is bolted with a sliding sleeve (256), and the movable rod (257) is slidably connected to the inner wall of the sliding sleeve (256). The top of the movable rod (257) is bolted with a rack (254), and the transmission gear (253) meshes with the rack (254). The reciprocating drive mechanism (25) further includes a first half gear (2511) and a first spur gear (2513) bolted to the surface of the vertical rotating rod (233). A transmission rod (259) and a transmission shaft (2510) are also rotatably connected to the inner wall of the housing (21). A second half gear (2512) and a second spur gear (2514) are respectively fixed to the surface of the transmission rod (259), and the first spur gear (2513) meshes with the second spur gear (2514). A driven gear (2515) is bolted to the surface of the transmission shaft (2510). A driven gear (2515) is fixed to the surface of the transmission shaft (2510). The driven gear (2515) and the first half gear (2511) are at the same height. The bottom end of the transmission shaft (2510) is connected to the long rod (252) through bevel gears.

7. The filtering device for sewage treatment with a filter membrane according to claim 6, characterized in that: The cross section of the movable rod (257) is designed to be square, and the inner wall of the sliding sleeve (256) is designed to be square.

8. The filtering device for sewage treatment with a filter membrane according to claim 6, wherein: The teeth on the surface of the first half gear (2511) are designed in a semi-circular shape, and the teeth on the surface of the second half gear (2512) are designed in a semi-circular shape.

9. The filtering device for sewage treatment with a filter membrane according to claim 1, characterized in that: A second delivery pump (6) is bolted to the tops of the filter tank (2) and the clean water tank (3).

10. A filtering device for sewage treatment with a filter membrane according to claim 1, characterized in that: The auxiliary frame (19) is designed in a zigzag shape.

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