Wastewater treatment device based on tubular membrane

Abstract

The invention discloses a wastewater treatment device based on a tubular membrane, and belongs to the technical field of wastewater treatment.The wastewater treatment device comprises an outer pipe and a tubular membrane body located in the outer pipe, a water inlet pipe and a water outlet pipe are arranged on the surface of the outer pipe, an end cover is arranged at one end of the outer pipe, and one end of the tubular membrane body is fixedly connected with the end cover; and a fixing ring for sleeving the other end of the tubular membrane body is arranged in the outer tube. The device has the beneficial effects that through cooperative work of the driving assembly and the closing assembly, under cooperation of a lead screw and a threaded cylinder, a communicating pipe is closed in the process of controlling a piston to move, and the piston moves to enable a cavity, close to one side of an outer pipe, of the connecting pipe to generate negative pressure; therefore, the filtering process of wastewater in the tubular membrane body is accelerated by using the transmembrane pressure difference, the wastewater treatment efficiency is improved, meanwhile, the membrane is prevented from being damaged due to overlarge pressure difference, and the service life of the tubular membrane body is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device based on a tubular membrane. Background Art

[0002] With the acceleration of industrialization and population growth, water shortage and water pollution are becoming increasingly serious. Wastewater treatment has become a key link in environmental protection and sustainable development. Among the many wastewater treatment technologies, membrane separation technology has attracted much attention due to its advantages such as high efficiency, energy saving, and no phase change. As an important form of membrane separation technology, tubular membrane can effectively remove hardness components in water and has broad application prospects in the field of wastewater treatment.

[0003] Most wastewater treatment methods, such as sedimentation, filtration, biological treatment, etc., often have problems such as unsatisfactory treatment effects, large footprint, and high operating costs when treating wastewater with complex components. Wastewater treatment devices based on tubular membranes usually have water flows in a static state. Impurities such as organic matter, inorganic matter, and microorganisms in the wastewater are easily adsorbed and deposited on the membrane surface to form a fouling layer, resulting in a decrease in membrane flux and an increase in filtration resistance, thereby affecting the treatment efficiency and the service life of the membrane. Summary of the invention

[0004] The purpose of the present invention is to propose a wastewater treatment device based on a tubular membrane in order to solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A wastewater treatment device based on a tubular membrane comprises an outer tube and a tubular membrane body located inside the outer tube, wherein a water inlet pipe and a water outlet pipe are respectively arranged on the surface of the outer tube, an end cap is arranged at one end of the outer tube, one end of the tubular membrane body is fixedly connected to the end cap, and a fixing ring for sleeve connection of the other end of the tubular membrane body is arranged inside the outer tube; The other end of the outer tube is provided with a connecting tube, a piston is slidably provided inside the connecting tube, a connecting tube is fixedly penetrated on the surface of the piston, and a drainage pipe is penetrated on the surface of the connecting tube; The utility model also comprises a driving component for driving the piston to move and a closing component for closing the connecting pipe.

[0006] As a further description of the above technical solution: The driving assembly includes a sealing cover arranged on one side of the connecting pipe and a threaded barrel rotatably arranged at the center of the piston, a screw rod rotatably matched with the threaded barrel is rotatably arranged on the inner side of the sealing cover, a motor for driving the screw rod to rotate is arranged on the outer side of the sealing cover, a mounting plate is arranged on the fixed sleeve on the outer side of the threaded barrel, a blocking member for limiting the forward rotation of the threaded barrel and matching with the connecting pipe is arranged on one side of the mounting plate, and a fixing rod for limiting the reverse rotation of the threaded barrel and matching with the mounting plate is arranged on the inner side of the sealing cover.

[0007] As a further description of the above technical solution: The sealing assembly includes a sealing plate for sealing one end of the connecting pipe, the sealing plate is hingedly matched with the mounting plate through a reset hinge, and the upper end of the mounting plate is elastically connected to an extrusion frame that cooperates with the fixing rod to squeeze the sealing plate to flip it and seal the connecting pipe.

[0008] As a further description of the above technical solution: A stirring blade is arranged inside the outer tube, and the stirring blades are multiple and distributed in a ring array. Both ends of the stirring blade are rotatably connected to the end cover and the fixing ring through a rotating shaft. A driving gear is arranged on the fixed sleeve outside the threaded cylinder, and a transmission member for driving the stirring blade to rotate and cooperating with the driving gear is arranged on the surface of the piston.

[0009] As a further description of the above technical solution: The transmission member includes a spline shaft and a spline sleeve that cooperate with each other. One end of the spline shaft is connected to the rotating shaft, and one end of the spline sleeve is closed. The spline sleeve is rotatably connected to the piston through a sealed bearing, and a driven gear that cooperates with the driving gear is fixedly sleeved on the outer side of the spline sleeve.

[0010] As a further description of the above technical solution: The blocking member comprises a limiting plate rotatably arranged on one side of the mounting plate, and one side of the mounting plate is fixedly arranged on a baffle plate used for limiting the unidirectional rotation of the limiting plate.

[0011] As a further description of the above technical solution: The water inlet pipe and the water outlet pipe are distributed diagonally on the surface of the outer pipe, the water inlet pipe is located on the lower surface of the outer pipe, and the drain pipe is located on the lower surface of the connecting pipe.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In the present invention, the driving component and the closing component work together, and under the cooperation of the screw rod and the threaded barrel, the connecting pipe is closed during the movement of the control piston, and the movement of the piston causes the cavity of the connecting pipe close to the outer pipe to generate negative pressure, thereby utilizing the trans-membrane pressure difference to accelerate the filtration process of wastewater in the tubular membrane body, improve the wastewater treatment efficiency, and avoid damage to the membrane due to excessive pressure difference, thereby extending the service life of the tubular membrane body; In the present invention, by arranging an outer tube, a tubular membrane, a water inlet pipe and a water outlet pipe, the tubular membrane body can effectively intercept suspended particles in wastewater based on a screening mechanism, and has a significant effect on removing hardness components of high-hardness wastewater, ensuring that the treated water quality reaches a higher standard, meets various water needs, and is conducive to the recycling of water resources; In the present invention, by controlling the forward and reverse rotation of the motor, on the one hand, the piston is driven to reciprocate, and on the other hand, the stirring blades are rotated to efficiently stir the water in the outer tube, change the direction of the water flow, and realize dynamic cleaning of the surface of the tubular membrane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The appearance diagram of a wastewater treatment device provided according to an embodiment of the present invention is shown; Figure 2 It shows a schematic diagram of a wastewater treatment device with hidden connecting pipes according to an embodiment of the present invention; Figure 3 It shows a schematic diagram of the explosion structure of a wastewater treatment device provided in an embodiment of the present invention; Figure 4 An exploded schematic diagram of the internal structure of a connecting pipe provided in an embodiment of the present invention is shown; Figure 5 An exploded schematic diagram of the transmission member and the blocking member structure provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the structure of a transmission member according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the structure of a stirring blade provided in an embodiment of the present invention is shown; Figure 8 It shows a schematic structural diagram of a sealing assembly provided according to an embodiment of the present invention; Fig. 9 A schematic structural diagram of an extrusion frame provided according to an embodiment of the present invention is shown.

[0014] Legend: 1. Outer tube; 2. End cover; 3. Water inlet pipe; 4. Water outlet pipe; 5. Connecting pipe; 6. Sealing cover; 7. Drain pipe; 8. Motor; 9. Agitating blade; 10. Tubular membrane body; 11. Fixing ring; 12. Lining ring; 13. Screw; 14. Fixing rod; 15. Piston; 16. Spline sleeve; 17. Connecting pipe; 18. Sealed bearing; 19. Driven gear; 20. Spline shaft; 21. Threaded cylinder; 22. Driving gear; 23. Limiting plate; 24. Baffle; 25. Mounting plate; 26. Pressure plate; 27. Sealing plate; 28. Extrusion rod; 29. ​​Guide rod; 30. Spring; 31. Rotating shaft; 32. Reset hinge. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1-Figure 9 As shown, a wastewater treatment device based on a tubular membrane comprises an outer tube 1 and a tubular membrane body 10 located inside the outer tube 1. The tubular membrane body 10 retains suspended particles in the wastewater on the membrane surface or inside the pores based on a screening mechanism, while clean water flows out through the membrane pores. The tubular membrane body 10 performs well in treating high-hardness wastewater and can effectively remove hardness components in the water. This process can be accelerated by applying a certain transmembrane pressure difference (TMP). The tubular membrane body 10 is coaxially arranged with the outer tube 1, and the surface of the outer tube 1 is provided with an inlet pipe 3 and an outlet pipe 4. Tube 4, water inlet pipe 3 and water outlet pipe 4 are integrally formed with outer tube 1, flanges are arranged at the ends of water inlet pipe 3 and water outlet pipe 4, one end of outer tube 1 is provided with end cap 2, end cap 2 is welded and fixed to outer tube 1, so as to achieve the effect of sealing the end of outer tube 1, one end of tubular membrane body 10 is fixedly connected with end cap 2, and a fixing ring 11 for sleeve connection of the other end of tubular membrane body 10 is arranged inside outer tube 1. During use, wastewater enters outer tube 1 through water inlet pipe 3, and then enters inside tubular membrane body 10, so as to achieve the effect of wastewater treatment, and then the remaining water is discharged through water outlet pipe 4; A connecting pipe 5 is provided at the other end of the outer tube 1. The connecting pipe 5 and the end of the outer tube 1 are both provided with flanges and are connected and fixed by bolts. A piston 15 is slidably provided inside the connecting pipe 5. A connecting pipe 17 is fixedly penetrated on the surface of the piston 15. A drain pipe 7 is penetrated on the surface of the connecting pipe 5. The clean water after being treated by the tubular membrane body 10 flows into the connecting pipe 5 from one end of the tubular membrane body 10, then circulates through the connecting pipe 17, and is discharged from the drain pipe 7. The invention also includes a driving assembly for driving the piston 15 to move and a sealing assembly for sealing the connecting pipe 17. After the connecting pipe 17 is sealed by the sealing assembly, the driving assembly drives the piston 15 to move (see the attached manual). Figure 1 And the instruction manual Figure 2 ), the driving assembly drives the piston 15 to move away from the outer tube 1, which will cause negative pressure to be generated in the cavity of the connecting tube 5 close to the outer tube 1, that is, a certain transmembrane pressure difference (TMP) is applied, which starts the effect of promoting water circulation, making it easier for wastewater to pass through the tubular membrane body 10 for treatment.

[0017] Further, the driving assembly includes a sealing cover 6 arranged on one side of the connecting pipe 5 and a threaded barrel 21 rotatably arranged at the center of the piston 15. An inner liner ring 12 is fixedly arranged on the inner side of the connecting pipe 5. The sealing cover 6 is connected and fixed to the inner liner ring 12 by bolts. A sealing gasket is arranged between the inner liner ring 12 and the sealing cover 6 to ensure the sealing of the connection between the sealing cover 6 and the inner liner ring 12. A screw rod 13 cooperating with the threaded barrel 21 is rotatably arranged on the inner side of the sealing cover 6. A motor 8 for driving the screw rod 13 to rotate is arranged on the outer side of the sealing cover 6. The motor 8 is fixedly connected to the sealing cover 6 by bolts. A mounting plate 25 is fixedly sleeved on the outer side of the threaded barrel 21. The mounting plate 25 is connected to the threaded barrel 21. 1 is welded and fixed on the outer surface, a blocking member cooperating with the connecting pipe 17 and used to limit the forward rotation of the threaded barrel 21 is provided on one side of the mounting plate 25, and a fixing rod 14 cooperating with the mounting plate 25 and used to limit the reverse rotation of the threaded barrel 21 is provided on the inner side of the sealing cover 6. When in use, the motor 8 starts to drive the screw rod 13 to rotate forward (counterclockwise). When the forward rotation of the threaded barrel 21 is not restricted, the rotation of the screw rod 13 will drive the threaded barrel 21 to rotate, and the rotation of the threaded barrel 21 will drive the mounting plate 25 to rotate. The rotation of the mounting plate 25 will drive the blocking member to move, so that the blocking member contacts the outer surface of the connecting pipe 17, and at this time, the forward rotation of the threaded barrel 21 is restricted (refer to the appendix of the specification). Figure 2 ), and then the screw rod 13 continues to rotate, which will drive the threaded barrel 21 to move, that is, drive the piston 15 to move to the side away from the outer tube 1. On the contrary, when the motor 8 starts to drive the screw rod 13 to reverse (clockwise rotation), and the reversal of the threaded barrel 21 is not restricted, the rotation of the screw rod 13 will drive the threaded barrel 21 to rotate, and the rotation of the threaded barrel 21 will drive the mounting plate 25 to rotate. The rotation of the mounting plate 25 will contact the surface of the fixed rod 14, and the reversal of the threaded barrel 21 is restricted. Then the screw rod 13 continues to reverse, which will drive the threaded barrel 21 to move in the opposite direction, that is, the reciprocating motion of the piston 15 is achieved through the forward and reverse rotation of the motor 8.

[0018] Further, the sealing assembly includes a sealing plate 27 for sealing one end of the connecting pipe 17. The sealing plate 27 is hingedly connected to the mounting plate 25 through a reset hinge 32. When the reset hinge 32 is reset, the sealing plate 27 is in an unfolded state (see the attached manual). Figure 2), at this time, the connecting pipe 17 is in a connected state, and the upper end of the mounting plate 25 is elastically connected with an extrusion frame that cooperates with the fixed rod 14 and is used to squeeze the sealing plate 27 to make it flip and close the connecting pipe 17. The extrusion frame includes a pressure plate 26 and a guide rod 29 fixedly arranged at the lower end of the pressure plate 26. The pressure plate 26 is semicircular and has a chamfered corner that cooperates with the fixed rod 14 at the edge. There are two guide rods 29. A guide groove that cooperates with the guide rod 29 is opened at the upper end of the mounting plate 25. The lower ends of the two guide rods 29 are connected to the inner bottom surface of the guide groove through a spring 30. An extrusion rod 28 that is in sliding contact with the outer surface of the mounting plate 25 is fixed at the lower end of the pressure plate 26. The extrusion rod 28 is used to squeeze the outer surface of the sealing plate 27, so that the sealing plate 27 flips and closes the connecting pipe 17. In use, when the motor 8 starts to drive the screw rod 13 to rotate forward (counterclockwise), the threaded cylinder 21 is driven to move after the forward rotation of the threaded cylinder 21 is restricted (the state at this time is as shown in the attached manual Figure 2 As shown in the figure, the movement of the threaded barrel 21 drives the extrusion frame to move. During this process, the pressure plate 26 gradually contacts and is squeezed with the end of the fixed rod 14, which causes the pressure plate 26 to move downward, thereby driving the extrusion rod 28 to move downward, squeezing the sealing plate 27, causing the sealing plate 27 to flip over and seal the connecting pipe 17. When the connecting pipe 17 is sealed, the threaded barrel 21 drives the piston 15 to continue to move, which causes the cavity of the connecting pipe 5 close to the outer pipe 1 to be pumped with negative pressure. Under the action of the negative pressure, the wastewater is better processed through the tubular membrane body 10. On the contrary, when the motor 8 starts to drive the screw rod 13 to reverse (rotate clockwise), it will first drive the threaded barrel 21 to reverse The threaded barrel 21 reverses and drives the mounting plate 25 to reverse, and the mounting plate 25 reverses and drives the extrusion frame to reverse, which will cause the pressure plate 26 to disengage from the fixing rod 14, and then under the reset action of the spring 30, the pressure plate 26 drives the extrusion rod 28 to move and reset, and then the sealing plate 27 flips open under the reset action of the reset hinge 32. At this time, the water sucked by the negative pressure will flow through the connecting pipe 17 and be discharged from the drain pipe 7. Secondly, the threaded barrel 21 reverses and drives the mounting plate 25 to reverse, which will cause the mounting plate 25 to contact the surface of the fixing rod 14, thereby limiting the reversal of the threaded barrel 21. Then the screw rod 13 continues to reverse and drives the threaded barrel 21 to move and reset, that is, drives the piston 15 to move and reset.

[0019] Furthermore, a stirring blade 9 is provided inside the outer tube 1. When the stirring blade 9 rotates, it will stir the water inside the outer tube 1. Under the stirring action of the stirring blade 9, the flow direction of the water flow relative to the tubular membrane body 10 is changed, so as to achieve the effect of dynamically cleaning the surface of the tubular membrane body 10 and reduce the adhesion of stains on the surface of the tubular membrane body 10. There are multiple stirring blades 9 and they are distributed in a ring array to improve the stirring effect of the water flow. The two ends of the stirring blade 9 are rotatably connected to the end cover 2 and the fixing ring 11 through the rotating shaft 31 respectively. The outer fixed sleeve of the threaded cylinder 21 is provided with a driving gear 22. The surface of the piston 15 is provided with a transmission member matched with the driving gear 22 for driving the stirring blade 9 to rotate. The rotation of the threaded cylinder 21 will drive the driving gear 22 to rotate, and the rotation of the driving gear 22 drives the stirring blade 9 to rotate through the transmission member.

[0020] Furthermore, the transmission member includes a spline shaft 20 and a spline sleeve 16 that cooperate with each other. One end of the spline shaft 20 is connected to the rotating shaft 31 through a coupling, and one end of the spline sleeve 16 is closed. The spline sleeve 16 is rotatably connected to the piston 15 through a sealed bearing 18. A driven gear 19 that cooperates with the driving gear 22 is fixedly sleeved on the outer side of the spline sleeve 16. The tooth ratio of the driving gear 22 to the driven gear 19 is 3:1. Then, for every rotation of the driving gear 22, the driven gear 19 will be driven to rotate three times, thereby improving the stirring efficiency of the stirring blade 9.

[0021] Further, the blocking member includes a limit plate 23 rotatably mounted on one side of the mounting plate 25, and a baffle 24 fixedly mounted on one side of the mounting plate 25 for limiting the unidirectional rotation of the limit plate 23. After the limit plate 23 contacts the surface of the connecting pipe 17 (see the appendix of the specification), Figure 2 And the instruction manual Figure 5 ), under the limiting action of the baffle 24, the rotation of the limit plate 23 is limited, and then the forward rotation (counterclockwise rotation) of the threaded barrel 21 is limited. When the threaded barrel 21 is reversed, after the limit plate 23 contacts the surface of the connecting pipe 17, the baffle 24 will not limit the rotation of the limit plate 23, and will not limit the reverse rotation of the threaded barrel 21. Therefore, during the reverse rotation of the threaded barrel 21, the stirring blade 9 will continue to rotate under the meshing action of the driving gear 22 and the driven gear 19.

[0022] Furthermore, the water inlet pipe 3 and the water outlet pipe 4 are diagonally distributed on the surface of the outer tube 1. The water inlet pipe 3 is located on the lower surface of the outer tube 1. The wastewater enters the outer tube 1 from the water inlet pipe 3, fills the outer tube 1, and is discharged from the water outlet pipe 4. The drain pipe 7 is located on the lower surface of the connecting pipe 5, which facilitates the clean water to be quickly discharged from the connecting pipe 5 and will not accumulate inside the connecting pipe 5.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wastewater treatment device based on a tubular membrane, comprising an outer tube (1) and a tubular membrane body (10) located inside the outer tube (1), wherein a water inlet pipe (3) and a water outlet pipe (4) are respectively provided on the surface of the outer tube (1), an end cap (2) is provided at one end of the outer tube (1), and one end of the tubular membrane body (10) is fixedly connected to the end cap (2), characterized in that: The outer tube (1) is provided with a fixing ring (11) inside for sleeve-connecting the other end of the tubular membrane body (10); The other end of the outer tube (1) is provided with a connecting tube (5), a piston (15) is slidably provided inside the connecting tube (5), a connecting tube (17) is fixedly penetrated through the surface of the piston (15), and a drainage pipe (7) is penetrated through the surface of the connecting tube (5); A threaded barrel (21) is coaxially arranged on one side of the piston (15); a sealing cover (6) is arranged on one side of the connecting pipe (5); a driving assembly is arranged on the sealing cover (6) and cooperates with the threaded barrel (21) to drive the piston (15) to move; a mounting plate (25) is arranged on the outer fixed sleeve of the threaded barrel (21); a blocking member is arranged on one side of the mounting plate (25) and cooperates with the connecting pipe (17) to limit the forward rotation of the threaded barrel (21); a fixing rod (14) is arranged on the inner side of the sealing cover (6) and cooperates with the mounting plate (25) to limit the reverse rotation of the threaded barrel (21); a sealing plate (27) is hingedly arranged at the lower end of the mounting plate (25) and is used to seal the connecting pipe (17); and an extrusion frame is elastically connected to the upper end of the mounting plate (25) and cooperates with the fixing rod (14) to squeeze the sealing plate (27) to make it turn over and seal the connecting pipe (17).

2. A wastewater treatment device based on tubular membrane according to claim 1, characterized in that: The driving assembly comprises a screw rod (13) matched with the threaded barrel (21) and a motor (8) driving the screw rod (13) to rotate, the screw rod (13) being rotatably connected to the inner side of the sealing cover (6), and the motor (8) being fixedly connected to the outer side of the sealing cover (6).

3. A wastewater treatment device based on tubular membrane according to claim 2, characterized in that: The sealing plate (27) is hingedly connected to the mounting plate (25) via a reset hinge (32).

4. A wastewater treatment device based on a tubular membrane according to claim 2 or 3, characterized in that: A stirring blade (9) is arranged inside the outer tube (1). The stirring blades (9) are in plurality and arranged in a ring array. Two ends of the stirring blade (9) are rotatably connected to the end cover (2) and the fixing ring (11) via a rotating shaft (31). A driving gear (22) is arranged on the outer fixing sleeve of the threaded cylinder (21). Transmission members for driving the stirring blade (9) to rotate and matching with the driving gear (22) are arranged on the surface of the piston (15).

5. A wastewater treatment device based on tubular membrane according to claim 4, characterized in that: The transmission member comprises a spline shaft (20) and a spline sleeve (16) which cooperate with each other. One end of the spline shaft (20) is connected to a rotating shaft (31). One end of the spline sleeve (16) is closed. The spline sleeve (16) is rotatably connected to a piston (15) via a sealing bearing (18). A driven gear (19) which cooperates with a driving gear (22) is fixedly sleeved on the outside of the spline sleeve (16).

6. A wastewater treatment device based on tubular membrane according to claim 2, characterized in that: The blocking member comprises a limiting plate (23) rotatably arranged on one side of a mounting plate (25); one side of the mounting plate (25) is fixedly arranged on a baffle (24) for limiting the unidirectional rotation of the limiting plate (23).

7. A wastewater treatment device based on tubular membrane according to claim 1, characterized in that: The water inlet pipe (3) and the water outlet pipe (4) are distributed diagonally on the surface of the outer pipe (1); the water inlet pipe (3) is located on the lower surface of the outer pipe (1); and the drainage pipe (7) is located on the lower surface of the connecting pipe (5).

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