MBR Membrane Tank Pretreatment System for Sewage Treatment

Abstract

The present invention discloses a pretreatment system for an MBR membrane tank used in sewage treatment, which relates to the technical field of sewage treatment. The system includes a box body and a filter cylinder installed inside the box body, and also includes: a sewage guiding pool; a circulating flocculation mechanism, which includes a plurality of mixing cylinders installed inside the box body, a mixing component and a control component installed inside the mixing cylinders; a mixing flow mechanism, which includes a mixing pipe installed inside the box body and a feed bin installed at the bottom of the mixing pipe; a driving mechanism; a deep filtration mechanism, which includes a filter screen installed at the bottom of the box body, a discharge box arranged below the filter screen, a drain pipe installed on the front of the discharge box, and a cleaning component for cleaning the filter screen; by adding a flocculant in batches and quantitatively in sewage of the same capacity according to a proportion, and enabling the flocculant to be uniformly mixed with the sewage, and by ensuring the flocculation time of the sewage under the condition of continuous flocculation treatment of the sewage, the efficiency and effect of the sewage flocculation treatment are improved at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a pretreatment system for an MBR membrane tank used in sewage treatment. Background Art

[0002] When performing sewage treatment, in order to reduce the working burden of the MBR membrane module and optimize the usage efficiency of the MBR membrane module, it is necessary to pre-treat the sewage at the front stage of the MBR membrane tank to reduce the sludge concentration entering the MBR membrane tank, thereby reducing the sludge accumulation problem of the MBR membrane module.

[0003] Currently, when treating sewage, a sedimentation tank is usually set up and a flocculant is added to make the sewage flocculate and precipitate. However, when the flocculant is currently put in, since the sewage is flowing, it is difficult for the staff to quantitatively put in the flocculant according to the amount of sewage, resulting in poor flocculation effect of the sewage and it is difficult to fully flocculate the sewage. Secondly, it takes a certain amount of time for the sewage to flocculate and precipitate, and it is difficult for small-volume sewage pretreatment equipment to quickly reduce the sludge level of the sewage in a short time; in addition, after the existing sewage flocculates and precipitates, it is also necessary to manually clean the sludge at the bottom of the sedimentation tank. When cleaning the sedimentation tank, it is necessary to suspend the pretreatment of the sewage, and thus it is difficult to continuously pre-treat the sewage. Summary of the Invention

[0004] The purpose of the present invention is to provide a pretreatment system for an MBR membrane tank used in sewage treatment to solve the above deficiencies in the prior art.

[0005] In order to achieve the above purpose, the present invention provides the following technical solution: A pretreatment system for an MBR membrane tank used in sewage treatment, including a box body and a filter cylinder installed inside the box body, and further including:

[0006] A sewage guiding pool, which is installed on the top of the box body;

[0007] A circulating flocculation mechanism, which is connected to the sewage guiding pool. The circulating flocculation mechanism includes a plurality of mixing cylinders installed inside the box body, a mixing component and a control component installed inside the mixing cylinder;

[0008] A mixing flow mechanism, which includes a mixing pipe installed inside the box body and a feed bin installed at the bottom of the mixing pipe;

[0009] A driving mechanism, which is installed inside the box body and is used to drive the filter cylinder to rotate;

[0010] A deep filtration mechanism, which includes a filter screen installed at the bottom of the box body, a discharge box arranged below the filter screen, a drain pipe installed on the front of the discharge box, and a cleaning component for cleaning the filter screen.

[0011] Further, the tops of the plurality of mixing cylinders are all connected to the bottom of the sewage guiding pool;

[0012] An injection pipe is installed on the top of the mixing cylinder.

[0013] Further, the mixing assembly comprises a first transmission shaft rotatably connected to the inside of the mixing drum, a rotating disk slidably sleeved on the outside of the first transmission shaft, and a plurality of slide grooves provided inside the rotating disk;

[0014] The top end of the first transmission shaft extends to the outside of the mixing drum;

[0015] A stirring blade is slidably connected inside the slide groove, the top of the stirring blade slides and extends to the outside of the turntable, a plurality of springs are fixedly connected to the bottom of the stirring blade, and the bottom end of the spring is fixedly connected to the inner wall of the bottom of the slide groove;

[0016] The inside of the box is rotatably connected to a second transmission shaft, the outside of the second transmission shaft is sequentially fixedly sleeved with a plurality of worms along its length direction, the outside of the first transmission shaft is fixedly sleeved with a worm wheel, and the worm is meshed with the worm wheel.

[0017] Further, the control assembly includes a first reciprocating screw rotatably connected to the interior of the mixing drum, a sealing ring threadedly connected to the exterior of the first reciprocating screw, and a plurality of conduits installed inside the rotating disk;

[0018] The outer wall of the sealing ring abuts against the inner wall of the mixing drum, and the rotating disk is rotatably connected to the inside of the sealing ring;

[0019] The top end of the first reciprocating screw extends to the outside of the mixing barrel and is fixedly connected to a first gear;

[0020] The box body is rotatably connected with a screw rod inside, and a rack is screwed on the outside of the screw rod, and the rack meshes with each first gear in sequence when moving;

[0021] A guide rod is provided on one side of the screw rod, the guide rod is fixed to the inner wall of the box body, and the rack is also slidably sleeved on the outside of the guide rod;

[0022] A solenoid valve is installed on the conduit.

[0023] Furthermore, a first motor is installed on the outer wall of one side of the box body, and an output end of the first motor is fixedly connected to one end of the second transmission shaft;

[0024] The second transmission shaft and the screw rod are connected via a transmission member, which is located outside the box. The transmission member includes two synchronous wheels that are respectively fixedly sleeved on the outside of the second transmission shaft and the outside of the screw rod, and a synchronous belt that is connected to the outside of the two synchronous wheels.

[0025] Furthermore, a mud discharge pipe is installed on the outer wall of the other side of the box;

[0026] The filter cartridge is rotatably connected between the feed bin and the sludge discharge pipe;

[0027] A spiral guide rod is fixedly connected inside the filter cartridge.

[0028] Furthermore, the driving mechanism includes a second motor installed on the outer wall of the other side of the box body and a gear ring fixedly sleeved outside the filter cartridge;

[0029] The output end of the second motor is fixedly connected with a second gear, and the second gear meshes with the gear ring.

[0030] Furthermore, the aperture of the filter screen is smaller than that of the filter cartridge.

[0031] Furthermore, the cleaning assembly includes a third transmission shaft rotatably connected inside the box body, a second reciprocating screw fixedly sleeved outside the third transmission shaft, and slag guide channels respectively installed on both sides of the bottom of the box body;

[0032] A third gear is fixedly sleeved outside the third transmission shaft, and the third gear meshes with the gear ring;

[0033] A scraping bar is screwed outside the second reciprocating screw, and the bottom of the scraping bar abuts against the top of the filter screen;

[0034] A slag guide ramp is installed between the filter screen and the slag guide channel.

[0035] Compared with the prior art, the MBR membrane tank pretreatment system for sewage treatment provided by the present invention has the following beneficial effects: By filling each mixing cylinder with sewage in sequence and adding a certain amount of flocculant, and at the same time making the flocculant and sewage mix evenly, by adding flocculant quantitatively in batches and proportionally in the same volume of sewage, and by ensuring the flocculation time of sewage under continuous flocculation treatment of sewage, the efficiency and effect of sewage flocculation treatment are improved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the internal structure of the box body of the present invention;

[0039] Figure 3 It is a schematic diagram of the structure of the circulating flocculation mechanism of the present invention;

[0040] Figure 4 Schematic diagram of the internal structure of the mixing cylinder of the present invention;

[0041] Figure 5 Schematic diagram of the structure of the mixing component of the present invention;

[0042] Figure 6 Schematic diagram of the structure of the conduit of the present invention;

[0043] Figure 7 Schematic diagram of the structures of the driving mechanism and the depth filtering mechanism of the present invention.

[0044] Explanation of the reference numerals in the drawings:

[0045] 1. Box body; 2. Filter cylinder; 3. Mixing cylinder; 4. First transmission shaft; 5. Turntable; 6. Chute; 7. Stirring blade; 8. Spring; 9. Worm; 10. Worm gear; 11. First reciprocating screw; 12. Sealing ring; 13. Conduit; 14. First gear; 15. Lead screw; 16. Rack; 17. Guide rod; 18. Solenoid valve; 19. First motor; 20. Second transmission shaft; 21. Transmission part; 22. Mixing pipe; 23. Feed bin; 24. Sludge discharge pipe; 25. Spiral guide rod; 26. Second motor; 27. Tooth ring; 28. Second gear; 29. Filter screen; 30. Discharge box; 31. Drain pipe; 32. Third transmission shaft; 33. Second reciprocating screw; 34. Slag guide channel; 35. Third gear; 36. Scraping bar; 37. Slag guide inclined platform; 38. Sewage guide pool; 39. Agent injection pipe. Detailed implementation manners

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the drawings.

[0047] Embodiment: Please refer to Figure 1 - Figure 7 , a pretreatment system for an MBR membrane tank for sewage treatment, including a box body 1 and a filter cylinder 2 installed inside the box body 1, and further including:

[0048] A sewage guide pool 38, which is installed on the top of the box body 1;

[0049] A circulating flocculation mechanism is connected to the sewage guide tank 38 and is used to control the quantitative mixing of the flocculant and the sewage and to control the time of mixing and flocculating the flocculant and the sewage. The circulating flocculation mechanism includes a plurality of mixing drums 3 installed inside the housing 1, a mixing assembly and a control assembly installed inside the mixing drum 3; the tops of the plurality of mixing drums 3 are connected to the bottom of the sewage guide tank 38; an injection tube 39 is installed on the top of the mixing drum 3, and the mixing assembly includes a first transmission shaft 4 rotatably connected to the inside of the mixing drum 3, a turntable 5 slidably sleeved on the outside of the first transmission shaft 4, and a plurality of slide grooves 6 opened inside the turntable 5; a key pin is fixed to the outside of the first transmission shaft 4, and the turntable 5 A key slot is provided inside the housing 1, and a key pin is slidably connected inside the key slot; the top end of the first transmission shaft 4 extends to the outside of the mixing drum 3; a stirring blade 7 is slidably connected inside the chute 6, and the top of the stirring blade 7 slides and extends to the outside of the turntable 5, and a plurality of springs 8 are fixedly connected to the bottom of the stirring blade 7, and the bottom end of the spring 8 is fixedly connected to the inner wall of the bottom of the chute 6; the inside of the housing 1 is rotatably connected to the second transmission shaft 20, and the outside of the second transmission shaft 20 is sequentially fixedly sleeved with a plurality of worms 9 along its length direction, and the outside of the first transmission shaft 4 is fixedly sleeved with a worm wheel 10, and the worm 9 is meshed with the worm wheel 10, and the control component includes a first transmission shaft 20 rotatably connected to the inside of the mixing drum 3 A reciprocating screw 11, a sealing ring 12 screwed to the outside of the first reciprocating screw 11, and a plurality of conduits 13 installed inside the turntable 5; the outer wall of the sealing ring 12 abuts against the inner wall of the mixing drum 3, and the turntable 5 is rotatably connected to the inside of the sealing ring 12; the top of the first reciprocating screw 11 extends to the outside of the mixing drum 3 and is fixedly connected to a first gear 14; a screw rod 15 is rotatably connected to the inside of the box body 1, and a rack 16 is screwed to the outside of the screw rod 15. The rack 16 meshes with each first gear 14 in sequence when moving, and the first gear 14 is a one-way gear; a guide rod 17 is provided on one side of the screw rod 15, and the guide rod 17 is fixedly connected to the inner wall of the box body 1. The rack 16 is also slidably sleeved on the outside of the guide rod 17; a solenoid valve 18 is installed on the guide tube 13, and when the turntable 5 moves upward, the solenoid valve 18 is opened, and when the turntable 5 moves downward, the solenoid valve 18 is closed. A first motor 19 is installed on the outer wall of one side of the box body 1, and the output end of the first motor 19 is fixedly connected to one end of the second transmission shaft 20; the second transmission shaft 20 and the screw rod 15 are connected by a transmission member 21, and the transmission member 21 is located outside the box body 1. The transmission member 21 includes two synchronous wheels that are respectively fixedly sleeved on the outside of the second transmission shaft 20 and the outside of the screw rod 15, and a synchronous belt that is connected to the outside of the two synchronous wheels;

[0050] By controlling the first motor 19 to drive the second transmission shaft 20 to rotate clockwise, multiple worm gears 9 rotate synchronously. Through the transmission connection of the transmission member 21, the lead screw 15 is driven to rotate synchronously. When the lead screw 15 rotates clockwise, it drives the rack 16 to move leftward along the outside of the guide rod 17. When the rack 16 moves leftward, it meshes with each first gear 14 in sequence, and the first reciprocating screw 11 rotates accordingly. Among them, during the process when the rack 16 meshes with the first gear 14 from the start to the loss of meshing, the sealing ring 12 first moves upward from the bottom to the top along the inner wall of the mixing cylinder 3, and the turntable 5 moves upward synchronously. The flocculated sewage at the top of the sealing ring 12 and the turntable 5 is discharged downward through the conduit 13. Then, the sealing ring 12 moves downward from the top to the bottom along the inner wall of the mixing cylinder 3, thereby pumping the sewage inside the sewage guiding pool 38 into the mixing cylinder 3. Then, a certain amount of flocculant is added into the mixing cylinder 3 through the dosing pipe 39. At the same time, when the worm gear 9 rotates, through the meshing action between the worm gear 9 and the worm wheel 10, the first transmission shaft 4 is driven to rotate, thereby driving the turntable 5 and each stirring blade 7 to rotate, so that the flocculant is evenly distributed in the sewage, and the sewage is fully flocculated. When the rack 16 continues to move leftward, it will mesh with the next first gear 14. Similarly, first, the flocculated sewage inside the mixing cylinder 3 is discharged, then the sewage is pumped into the next mixing cylinder 3, and a certain amount of flocculant is added into the mixing cylinder 3. This cycle continues. During the process of the rack 16 moving leftward, first, the flocculated sewage inside the mixing cylinder 3 is discharged, then each mixing cylinder 3 is filled with sewage in sequence, and a certain amount of flocculant is added. At the same time, the flocculant and the sewage are evenly mixed. Then, control the first motor 19 to drive the second transmission shaft 20 to rotate counterclockwise. Through the transmission connection of the transmission member 21, the lead screw 15 is driven to rotate counterclockwise synchronously, thereby driving the rack 16 to move rightward along the outside of the guide rod 17. When the rack 16 moves rightward, it also meshes with each first gear 14 in sequence. However, since the first gear 14 is a one-way gear, when the rack 16 moves rightward and meshes with the first gear 14, the first gear 14 rotates accordingly, but the first reciprocating screw 11 does not rotate accordingly. After the rack 16 moves rightward and resets, by controlling the first motor 19 to drive the lead screw 15 to rotate clockwise, the rack 16 is driven to move leftward again, and the above operations are repeated. By continuously flocculating the sewage, the flocculation time of the sewage is guaranteed, and at the same time, the efficiency and effect of sewage flocculation treatment are improved;

[0051] It is worth mentioning that when the stirring blade 7 abuts against the inner wall of the top of the mixing cylinder 3, as the turntable 5 continues to move upward, the stirring blade 7 moves into the chute 6 accordingly, and the spring 8 is compressed. When the turntable 5 moves downward, through the rebounding force of the spring 8, the stirring blade 7 is driven to move upward, and the subsequent sewage can be continuously stirred.

[0052] The mixed-flow mechanism is used to introduce the fully flocculated sewage into the interior of the filter cylinder 2. The mixed-flow mechanism includes a mixing pipe 22 installed inside the box body 1 and a feed bin 23 installed at the bottom of the mixing pipe 22; a sludge discharge pipe 24 is installed on the outer wall of the other side of the box body 1; the filter cylinder 2 is rotatably connected between the feed bin 23 and the sludge discharge pipe 24; a spiral guide rod 25 is fixedly connected inside the filter cylinder 2;

[0053] After the flocculated sewage is discharged downward through the conduit 13, it enters the interior of the filter cylinder 2 through the mixing pipe 22 and the feed bin 23. When the filter cylinder 2 rotates, the flocculated sewage is dehydrated. The agglomerated particulate matters flocculated together are filtered inside the filter cylinder 2. Through the arrangement of the spiral guide rod 25, the agglomerated particulate matters are successively driven to move leftward, enter the interior of the sludge discharge pipe 24, and are finally discharged through the sludge discharge pipe 24.

[0054] The driving mechanism is installed inside the box body 1 and is used to drive the filter cylinder 2 to rotate. The driving mechanism includes a second motor 26 installed on the outer wall of the other side of the box body 1 and a gear ring 27 fixedly sleeved outside the filter cylinder 2; the output end of the second motor 26 is fixedly connected with a second gear 28, and the second gear 28 meshes with the gear ring 27;

[0055] By controlling the second motor 26 to drive the second gear 28 to rotate, through the meshing action between the second gear 28 and the gear ring 27, the filter cylinder 2 is driven to rotate, and the flocculated sewage entering the interior of the filter cylinder 2 is dehydrated.

[0056] The deep filtration mechanism is used to filter the sewage thrown out from the interior of the filter cylinder 2. The deep filtration mechanism includes a filter net 29 installed at the bottom of the box body 1, a discharge box 30 arranged below the filter net 29, a drain pipe 31 installed on the front of the discharge box 30, and a cleaning component for cleaning the filter net 29; the aperture of the filter net 29 is smaller than the aperture of the filter cylinder 2. The cleaning component includes a third transmission shaft 32 rotatably connected inside the box body 1, a second reciprocating screw 33 fixedly sleeved outside the third transmission shaft 32, and slag guide channels 34 respectively installed on both sides of the bottom of the box body 1; a third gear 35 is fixedly sleeved outside the third transmission shaft 32, and the third gear 35 meshes with the gear ring 27; a scraping strip 36 is screwed outside the second reciprocating screw 33, and the bottom of the scraping strip 36 abuts against the top of the filter net 29; a slag guide slope 37 is installed between the filter net 29 and the slag guide channels 34;

[0057] The sewage thrown out by the filter cartridge 2 is filtered again through the filter screen 29 to perform a secondary filtration treatment on small particulate matters. Among them, when the toothed ring 27 rotates, it drives the third gear 35 to rotate synchronously, and then drives the second reciprocating screw 33 to rotate synchronously through the third transmission shaft 32. Accordingly, the scraping strip 36 reciprocates left and right along the top of the filter screen 29 to scrape the particulate impurities on the top of the filter screen 29 to the left and right. When the scraping strip 36 abuts against one side of the slag guiding inclined table 37, the particulate impurities are driven onto the inclined surface at the top of the slag guiding inclined table 37. The scraping strip 36 cleans the top of the filter screen 29 multiple times. When the accumulated particulate impurities become more and more, the particulate impurities cross over the slag guiding inclined table 37 and fall into the inside of the slag guiding channel 34 and are discharged through the slag guiding channel 34. The sewage passing through the filter screen 29 enters the inside of the discharge box 30 and reaches the next sewage treatment station through the drain pipe 31.

[0058] It should be noted that the device structure and the attached drawings of the present invention mainly describe the principle of the present invention. Based on the technical principle of this design, the settings of the power mechanism, power supply system, control system, etc. of the device are not fully described clearly. However, on the premise that those skilled in the art understand the principle of the above invention, the specific power mechanism, power supply system and control system can be clearly known. The control mode of the application document is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art; only some exemplary embodiments of the present invention are described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above attached drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A pretreatment system for an MBR membrane tank used in sewage treatment, comprising a box body and a filter cylinder installed inside the box body, characterized in that, Also includes: A sewage guide tank, which is installed on the top of the box; A circulating flocculation mechanism is connected to the sewage guide tank, and the circulating flocculation mechanism includes a plurality of mixing drums installed inside the box body, a mixing assembly installed inside the mixing drum, and a control assembly; The mixing mechanism is used to guide the fully flocculated sewage into the filter cartridge, and includes a mixing pipe installed inside the box body and a feed bin installed at the bottom of the mixing pipe; A driving mechanism, which is installed inside the box and is used to drive the filter cartridge to rotate; A deep filtering mechanism, which includes a filter screen installed at the bottom of the box body, a discharge box arranged below the filter screen, a drain pipe installed on the front of the discharge box, and a cleaning component for cleaning the filter screen; The tops of the multiple mixing cylinders are connected to the bottom of the sewage tank; an injection pipe is installed on the top of the mixing cylinder; The mixing assembly comprises a first transmission shaft rotatably connected to the inside of the mixing drum, a turntable slidably sleeved on the outside of the first transmission shaft, and a plurality of chutes provided inside the turntable; the top of the first transmission shaft extends to the outside of the mixing drum; a stirring blade is slidably connected to the inside of the chutes, the top of the stirring blade slides and extends to the outside of the turntable, a plurality of springs are fixedly connected to the bottom of the stirring blade, and the bottom end of the spring is fixedly connected to the inner wall of the bottom of the chutes; a second transmission shaft is rotatably connected to the inside of the box, a plurality of worms are fixedly sleeved on the outside of the second transmission shaft in sequence along its length direction, a worm wheel is fixedly sleeved on the outside of the first transmission shaft, and the worm and the worm wheel are meshed; The control assembly includes a first reciprocating screw rotatably connected to the inside of the mixing drum, a sealing ring screwed to the outside of the first reciprocating screw, and a plurality of conduits installed inside the turntable; the outer wall of the sealing ring abuts against the inner wall of the mixing drum, and the turntable is rotatably connected to the inside of the sealing ring; the top end of the first reciprocating screw extends to the outside of the mixing drum and is fixedly connected to the first gear; the inside of the box is rotatably connected to a lead screw, the outside of the lead screw is screwed to a rack, and the rack meshes with each first gear in sequence when moving; a guide rod is provided on one side of the lead screw, the guide rod is fixed to the inner wall of the box, and the rack is also slidably sleeved on the outside of the guide rod; an electromagnetic valve is installed on the conduit.

2. The pretreatment system for an MBR membrane tank used in sewage treatment according to claim 1, wherein, A first motor is installed on the outer wall of one side of the box body, and an output end of the first motor is fixedly connected to one end of the second transmission shaft; The second transmission shaft and the lead screw are connected via a transmission member.

3. The pretreatment system for an MBR membrane tank for sewage treatment according to claim 2, wherein, A mud discharge pipe is installed on the outer wall of the other side of the box; The filter cartridge is rotatably connected between the feed bin and the mud discharge pipe; A spiral material guide rod is fixedly connected inside the filter cylinder.

4. The pretreatment system for an MBR membrane tank used in sewage treatment according to claim 3, wherein, The driving mechanism includes a second motor mounted on the outer wall of the other side of the box body and a gear ring fixedly sleeved on the outside of the filter cartridge; A second gear is fixedly connected to the output end of the second motor, and the second gear is meshed with the ring gear.

5. The pretreatment system for an MBR membrane tank for sewage treatment according to claim 4, wherein, The pore size of the filter screen is smaller than the pore size of the filter cartridge.

6. The pretreatment system for an MBR membrane tank for sewage treatment according to claim 5, characterized in that, The cleaning assembly includes a third transmission shaft rotatably connected to the inside of the box body, a second reciprocating screw fixedly sleeved on the outside of the third transmission shaft, and slag guide channels respectively installed on both sides of the bottom of the box body; The third transmission shaft is externally fixedly sleeved with a third gear, and the third gear is meshed with a gear ring; The exterior of the second reciprocating screw is threaded with a scraper bar, and the bottom of the scraper bar abuts against the top of the filter screen; A slag guiding ramp is installed between the filter screen and the slag guiding channel.

Images