A high-efficiency sewage treatment equipment based on membrane bioreactor

Abstract

The present invention relates to the field of sewage treatment technology, and more specifically to a high-efficiency sewage treatment device based on a membrane bioreactor, comprising a separation chamber and a reaction chamber; a rotating trough with a cylindrical structure is horizontally arranged at the lower part of the separation chamber, a rotating barrel is rotatably arranged in the rotating trough, the axis of the rotating barrel is collinear with the axis of the rotating trough, the rotating barrel separates the separation chamber and the reaction chamber, a delivery port is opened on the peripheral wall of the rotating barrel, the delivery port has two states: vertically facing upward and vertically facing downward. When the delivery port is vertically facing upward, the sludge in the separation chamber enters the rotating barrel through the delivery port, and when the delivery port is vertically facing downward, the sludge in the rotating barrel is discharged into the reaction chamber through the delivery port. The present invention not only avoids the situation where sludge remains in the rotating barrel and cannot be discharged, but also ensures that when the aeration pipe cleans the membrane assembly, there will be no sludge accumulation at the bottom of the separation chamber, thereby improving the cleaning effect of the membrane assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a high-efficiency sewage treatment device based on a membrane bioreactor. Background Art

[0002] During the treatment of wastewater through a membrane bioreactor, sludge will be deposited at the bottom of the reaction chamber, especially in the area below the membrane assembly. These areas are usually difficult to clean because they are blocked by the membrane assembly, resulting in obstruction of water flow in the reaction chamber, affecting the mixing and treatment process of the sewage, thereby reducing the stability and quality of the effluent water quality, and causing the accumulation of sludge at the bottom of the membrane assembly to gradually increase. On the one hand, the sludge will clog the filter membrane tube near the lower end of the membrane assembly, reducing the treatment effect of the membrane bioreactor on sewage. On the other hand, the deposition of sludge at the bottom will cause some sludge to lose contact area and biological activity, reducing the sludge concentration in the reaction chamber, resulting in insufficient biomass in the reaction chamber, thereby affecting the biological treatment effect of the sewage and the stability of water quality.

[0003] Chinese patent announcement number CN118637744B discloses a chemical wastewater treatment device based on a membrane bioreactor, comprising: a box body, a partition fixedly installed inside the box body; the partition divides the inside of the box body into three chambers; a delivery pump is installed in the box body; the three chambers are respectively a regulating chamber, a reaction chamber and a sludge chamber; a membrane assembly is installed in the reaction chamber; a liquid inlet connected to the regulating chamber is opened on one side of the box body; a feed pipe connected to an external dosing pump is fixedly installed on the upper end of the regulating chamber; a liquid outlet pipe connected to the membrane assembly is fixedly connected to the upper end of the box body; a mounting cylinder, a sewage cylinder is provided inside the reaction chamber; the sewage cylinder is fixedly connected to the bottom of the reaction chamber; the mounting cylinder is installed at the bottom of the sewage cylinder; the A support rod is fixedly connected in the mounting tube; the membrane assembly is fixedly mounted on the upper end of the support rod; a blade is provided under the support rod; the blade is in sliding contact with the mounting tube; a mud outlet is provided on the surface of the mounting tube; the mounting tube is connected with the sewage barrel through the mud outlet; the mud outlet is located under the support rod; a cavity is provided inside the box body; a drive motor is fixedly installed in the cavity; the drive motor is used to drive the blade to rotate; a spiral plate, the spiral plate is rotatably connected in the mounting tube; the spiral plate is in sliding and sealing contact with the mounting tube and the sewage barrel; a connecting unit is provided inside the mounting tube; the drive motor drives the spiral plate to rotate through the connecting unit; an aeration pipe is fixedly installed at the bottom of the reaction chamber; the aeration pipe surrounds the sewage barrel.

[0004] The above scheme provides a structure for discharging sludge from under the membrane assembly, but in the process of discharging the sludge, a large amount of sludge will accumulate in the spiral structure between the membrane assembly and the sewage bucket and cannot be discharged. The sludge accumulated under the membrane assembly is only scraped off by the blades, and it cannot be guaranteed that all the sludge is moved between the membrane assembly and the sewage bucket. At the same time, sludge will also accumulate on the upper part of the blades. The main function of the aeration pipe is to clean the membrane assembly, but the aeration pipe and the membrane assembly in the above scheme are separated, which makes it impossible for the aeration pipe to clean the membrane assembly normally. Summary of the Invention

[0005] In order to solve the above problems, a high-efficiency sewage treatment equipment based on membrane bioreactor is provided. By setting a separation chamber and a reaction chamber, and setting a rotating barrel that can separate the separation chamber and the reaction chamber at the bottom of the separation chamber, when the membrane component in the separation chamber is filtering, all the intercepted sludge falls into the rotating barrel through the delivery port. After the membrane component has been running for a period of time, the rotating barrel drives the delivery port to rotate 180 degrees, so that the delivery port is vertically downward. At this time, the rotating barrel still separates the separation chamber and the reaction chamber, and the sludge in the rotating barrel is discharged into the reaction chamber through the delivery port, so that the sludge content in the reaction chamber rises and is stirred. Stirring increases the sludge concentration, which can ultimately increase the biomass in the reaction chamber. At the same time, the aeration pipe aerates the membrane assembly. Since there is no sludge accumulation at the bottom of the separation chamber at this time, the sludge that is not accumulated is lifted up during aeration, ensuring that the sludge attached to the membrane assembly can be better cleaned off. Compared with the use of spiral blades for transportation, the use of a rotating barrel with a delivery port for sludge transportation avoids the situation where the sludge remains in the rotating barrel and cannot be discharged, and ensures that when the aeration pipe is cleaning the membrane assembly, there will be no sludge accumulation at the bottom of the separation chamber, thereby improving the cleaning effect of the membrane assembly.

[0006] In order to solve the problems of the existing technology, the present invention provides a high-efficiency sewage treatment equipment based on a membrane bioreactor, including a separation chamber and a reaction chamber arranged from top to bottom in a vertical direction; a rotating trough with a cylindrical structure is horizontally arranged at the lower part of the separation chamber, and a rotating barrel is rotatably arranged in the rotating trough, and the axis of the rotating barrel is collinear with the axis of the rotating trough. The rotating barrel separates the separation chamber and the reaction chamber, and a conveying port is opened on the peripheral wall of the rotating barrel. The conveying port has two states: vertically facing upward and vertically facing downward. When the conveying port is vertically facing upward, the sludge in the separation chamber enters the rotating barrel through the conveying port. When the conveying port is vertically facing downward, the sludge in the rotating barrel is discharged into the reaction chamber through the conveying port.

[0007] Preferably, a scraper is provided in the rotating barrel to rotate around the axis of the rotating barrel, and both ends of the scraper are in contact with the inner wall of the rotating barrel respectively. When the conveying port is in a vertical upward state, the scraper is in a vertical stationary state, and when the conveying port is in a conveying downward state, the scraper is in a rotating state.

[0008] Preferably, a first electromagnet is fixedly provided on the side wall of the rotating barrel. The first electromagnet and the conveying port are symmetrically arranged about the axis of the rotating barrel. When the conveying port is vertically facing upward, the first electromagnet is energized and attracts one end of the scraper.

[0009] Preferably, a driving unit for driving the rotating barrel to rotate is provided on one side of the rotating barrel, and the driving unit includes a driving sleeve that moves along the axial direction of the rotating groove, and the driving sleeve can rotate around its own axis. When the end of the driving sleeve contacts the rotating barrel, the rotating barrel and the scraper both rotate synchronously with the driving sleeve. When the end of the driving sleeve does not contact the rotating barrel, only the scraper rotates synchronously with the driving sleeve.

[0010] Preferably, a movable unit for driving the driving sleeve is provided on the periphery of the driving sleeve, the movable unit includes a pushing sleeve fixedly provided on the end of the driving sleeve, a first magnetic ring is provided on the periphery of the pushing sleeve, a second magnetic ring is provided on the periphery of the driving sleeve, and a second electromagnet and a third electromagnet are respectively provided on both sides away from each other of the first magnetic ring and the second magnetic ring.

[0011] Preferably, a contact assembly is fixedly provided at the end of the scraper, and a first friction ring capable of contacting and cooperating with an end of the contact assembly away from the scraper and a second friction ring capable of contacting and cooperating with the end of the rotating barrel are provided on the driving sleeve.

[0012] Preferably, the contact assembly includes a limiting ring arranged at one end of the scraper and rotating synchronously with the scraper, a sliding sleeve is arranged on the side of the limiting ring away from the scraper and moves along the axis of the rotating barrel, there is a gap between the sliding sleeve and the limiting ring, and a spring is arranged in the gap, when the second friction ring contacts and cooperates with the end of the rotating barrel, the first friction ring contacts and cooperates with the sliding sleeve and the spring is in a compressed state.

[0013] Preferably, a third friction ring is fixedly provided in the inner ring of the driving sleeve, and the third friction ring can be in contact with and cooperate with the limiting ring. After the third friction ring is in contact with and cooperates with the limiting ring, the limiting ring rotates synchronously with the third friction ring.

[0014] Preferably, a clamping unit for clamping the rotating barrel is provided on one side of the rotating groove, and the clamping unit includes a clamping plate arranged on one side of the rotating groove and movable in a horizontal direction. When the clamping plate contacts the side wall of the rotating barrel, the rotating barrel cannot rotate.

[0015] Preferably, a driving rod is slidably provided in the pushing sleeve along the extending direction of the pushing sleeve, a rotary driver for driving the driving rod is provided at the end of the driving rod, and the pushing sleeve rotates synchronously with the driving rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention sets a separation chamber and a reaction chamber, and sets a rotating barrel at the bottom of the separation chamber to separate the separation chamber and the reaction chamber, so that when the membrane assembly in the separation chamber is filtering, all the intercepted sludge falls into the rotating barrel through the delivery port. After the membrane assembly has been running for a period of time, the rotating barrel drives the delivery port to rotate 180 degrees, so that the delivery port is vertically downward. At this time, the rotating barrel still separates the separation chamber and the reaction chamber, and the sludge in the rotating barrel is discharged into the reaction chamber through the delivery port, so that the sludge content in the reaction chamber increases and with the stirring, the sludge concentration increases. Finally, the biomass in the reaction chamber can be increased. At the same time, the aeration pipe aerates the membrane assembly. Since there is no sludge accumulation at the bottom of the separation chamber at this time, the unaccumulated sludge is lifted up during aeration, ensuring that the sludge attached to the membrane assembly can be better cleaned off. Compared with the use of spiral blades for transportation, the use of a rotating barrel with a delivery port for sludge transportation can avoid the situation where the sludge remains in the rotating barrel and cannot be discharged, and ensures that when the aeration pipe is cleaning the membrane assembly, there will be no sludge accumulation at the bottom of the separation chamber, thereby improving the cleaning effect of the membrane assembly.

[0018] 2. The present invention provides a rotatable scraper on the rotating barrel. When the delivery port is vertically upward, the rotating barrel and the separation chamber are communicated with each other, and the sludge in the separation chamber falls into the rotating barrel through the delivery port, so that the scraper is in a vertical static state, ensuring that the sludge in the separation chamber can smoothly pass through the delivery port into the rotating barrel. When the delivery port needs to switch its state, the scraper rotates 180 degrees synchronously with the rotating barrel, and the scraper is in a relatively static state in the rotating barrel. When the delivery port is rotated to face vertically downward, the scraper starts to rotate in the rotating barrel. As the scraper rotates, part of the sludge remaining in the rotating barrel can be scraped off by the scraper, and the scraped off sludge is discharged into the reaction chamber through the delivery port. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention.

[0020] Figure 2 This is a cutaway perspective diagram of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention. Figure 1 .

[0021] Figure 3 This is a cutaway perspective diagram of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention. Figure 2 .

[0022] Figure 4 The present invention is a high-efficiency sewage treatment equipment based on membrane bioreactor Figure 3 A local enlarged schematic diagram of point A in the middle.

[0023] Figure 5It is a three-dimensional schematic diagram of a high-efficiency sewage treatment equipment based on a membrane bioreactor of the present invention with the separation chamber and the reaction chamber removed.

[0024] Figure 6 It is a three-dimensional schematic diagram of a sludge discharge unit of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention.

[0025] Figure 7 It is a side view of a sludge discharge unit of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention.

[0026] Figure 8 The present invention is a high-efficiency sewage treatment equipment based on membrane bioreactor Figure 7 Schematic cross-sectional view at the middle BB.

[0027] Figure 9 The present invention is a high-efficiency sewage treatment equipment based on membrane bioreactor Figure 8 A partial enlarged schematic diagram of point C in the middle.

[0028] Figure 10 It is a cutaway perspective schematic diagram of a sludge discharge unit of a high-efficiency sewage treatment device based on a membrane bioreactor according to the present invention.

[0029] The numbers in the figure are:

[0030] 1. Separation chamber; 11. Aeration tube; 12. Membrane assembly; 13. Water inlet pipe; 2. Reaction chamber; 3. Mud discharge unit; 31. Rotating barrel; 311. Delivery port; 32. Scraper; 33. First electromagnet; 4. Driving unit; 41. Driving sleeve; 411. First friction ring; 412. Second friction ring; 413. Contact assembly; 4131. Limiting ring; 4132. Sliding sleeve; 4133. Spring; 4134. Extension shaft; 414. Third friction ring; 42. Moving unit; 421. Pushing sleeve; 422. First magnetic ring; 423. Second magnetic ring; 424. Second electromagnet; 425. Third electromagnet; 43. Rotary drive; 44. Driving rod; 5. Clamping unit; 51. Clamping plate; 52. Linear drive. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1-Figure 4 and Figure 7: A high-efficiency sewage treatment equipment based on a membrane bioreactor, comprising a separation chamber 1 and a reaction chamber 2 arranged from top to bottom in a vertical direction; a rotating trough with a cylindrical structure is horizontally arranged at the lower part of the separation chamber 1, and a rotating barrel 31 is rotatably arranged in the rotating trough, and the axis of the rotating barrel 31 is colinear with the axis of the rotating trough. The rotating barrel 31 separates the separation chamber 1 and the reaction chamber 2, and a delivery port 311 is opened on the peripheral wall of the rotating barrel 31. The delivery port 311 has two states: vertically facing upward and vertically facing downward. When the delivery port 311 is vertically facing upward, the sludge in the separation chamber 1 enters the rotating barrel 31 through the delivery port 311. When the delivery port 311 is vertically facing downward, the sludge in the rotating barrel 31 is discharged into the reaction chamber 2 through the delivery port 311.

[0033] The reaction chamber 2 of the existing sewage treatment equipment is provided with an aeration pipe 11, a membrane assembly 12 and a water inlet pipe 13. The water inlet pipe 13 introduces wastewater into the reaction chamber 2. The membrane assembly 12 arranged in the reaction chamber 2 filters the wastewater. The filtered liquid is discharged through the membrane assembly 12, and the sludge in the wastewater is intercepted by the membrane assembly 12. Part of the sludge adheres to the membrane assembly 12, and part of the sludge directly settles to the bottom of the reaction chamber 2. The aeration pipe 11 is arranged below the membrane assembly 12. The aeration pipe 11 regularly aerates the membrane assembly 12 so that the sludge attached to the membrane assembly 12 is vibrated down. However, in the process of aerating the membrane assembly 12 by the aeration pipe 11, the sludge settled at the bottom of the reaction chamber 2 is stirred up, and the stirred up sludge will adhere to the membrane assembly 12 again, resulting in the cleaning of the membrane assembly 12. The treatment effect is reduced, and the sludge accumulated under the membrane assembly 12 will gradually approach the membrane assembly 12 over time, thereby causing the lower layer of the membrane assembly 12 to be blocked by the sludge. At the same time, in order to ensure the sludge concentration in the reaction chamber 2, the precipitated sludge needs to be stirred. However, although the contact area of ​​the sludge after stirring is increased, the biomass of the reaction chamber 2 is increased, but it will cause the membrane assembly 12 to be quickly blocked. In order to solve the above problems, Chinese patent announcement CN118637744B discloses a chemical wastewater treatment device based on a membrane bioreactor. The above device divides the reaction chamber 2 into two parts, one part is used to filter the sludge, and the other part is used to hold the sludge. However, during the sludge transportation process, a large amount of sludge is likely to accumulate in the spiral blades, and the sludge transportation efficiency is low.

[0034] In order to avoid the above situation, the structure of the existing sewage treatment equipment is redesigned to avoid using spiral blades to transport the separated sludge, thereby avoiding the situation where a large amount of sludge remains in the spiral blades. At the same time, when the aeration pipe 11 is performing the aeration operation, a large amount of sludge will not be raised, thereby improving the cleaning effect of the aeration pipe 11. The specific structure and working process of the sewage high-efficiency treatment equipment of the present invention are as follows:

[0035] The separation chamber 1 and the reaction chamber 2 are arranged vertically from top to bottom. A sludge discharge unit 3 is provided in the rotating trough at the lower part of the separation chamber 1 to separate the separation chamber 1 and the reaction chamber 2 from each other. The water inlet pipe 13, the aeration pipe 11 and the membrane assembly 12 are all located in the separation chamber 1. When in use, the water inlet pipe 13 introduces wastewater into the separation chamber 1, and then the membrane assembly 12 is started. The membrane assembly 12 extracts the filtered liquid, and the sludge is intercepted by the membrane assembly 12. At this time, the rotating barrel 31 in the sludge discharge unit 3 is in a stopped state, and the delivery port 311 provided on the rotating barrel 31 is The sludge is intercepted by the membrane assembly 12 and then settles. The settled sludge falls to the bottom of the separation chamber 1 and falls into the rotating barrel 31 through the conveying port 311. As the membrane assembly 12 continues to operate, more and more sludge is intercepted by the membrane assembly 12 and falls into the rotating barrel 31. In order to avoid the sludge in the rotating barrel 31 from overflowing, the rotation time of the rotating barrel 31 needs to be pre-set during use, that is, the holding time of the conveying port 311 on the rotating barrel 31 in the two states is set. When the conveying port 311 on the rotating barrel 31 is kept in the vertical upward state for a set time, the rotating barrel 31 drives the conveying port 311 to rotate 180 degrees, so that the conveying port 311 switches to the vertical downward state. Since the rotating barrel 31 is filled with sludge, when the conveying port 311 switches to the vertical downward state as the rotating barrel 31 rotates, the sludge in the rotating barrel 31 can be discharged through the conveying port 311. At this time, the rotating barrel 31 is connected to the reaction chamber 2 through the conveying port 311, and the sludge in the rotating barrel 31 is discharged into the reaction chamber 2 through the conveying port 311. During the process of discharging the sludge into the reaction chamber 2, the aeration pipe 11 is activated, and the aeration pipe 11 aerates the membrane assembly 12. The sludge attached to the membrane assembly 12 is shaken off and falls to accumulate at the bottom of the separation chamber 1. Since the separation chamber 1 and the reaction chamber 2 are separated by the rotating barrel 31, the sludge in the reaction chamber 2 cannot directly enter the separation chamber 1. At the same time, when the aeration pipe 11 is activated, there is no sludge accumulation at the bottom of the separation chamber 1. Therefore, when the aeration pipe 11 is aerated, the sludge accumulated at the bottom of the separation chamber 1 will not be lifted, thereby reducing the cleaning effect of the membrane assembly 12. After all the sludge has been discharged into the reaction chamber 2, the rotating barrel 31 rotates 180 degrees again, and the aeration pipe 11 stops aeration. The sludge that falls from the membrane assembly 12 accumulates at the bottom of the separation chamber 1 and falls into the rotating barrel 31 when the delivery port 311 rotates to a vertically upward state, and the cycle repeats.

[0036] By setting the separation chamber 1 and the reaction chamber 2, and setting a rotating barrel 31 at the bottom of the separation chamber 1 that can separate the separation chamber 1 and the reaction chamber 2, when the membrane assembly 12 in the separation chamber 1 is filtering, all the intercepted sludge falls into the rotating barrel 31 through the delivery port 311. After the membrane assembly 12 continues to operate for a period of time, the rotating barrel 31 drives the delivery port 311 to rotate 180 degrees, so that the delivery port 311 is vertically downward. At this time, the rotating barrel 31 still separates the separation chamber 1 and the reaction chamber 2, and the sludge in the rotating barrel 31 is discharged into the reaction chamber 2 through the delivery port 311, so that the sludge content in the reaction chamber 2 increases and with stirring, the sludge concentration increases. The sludge rises, which can eventually increase the biomass in the reaction chamber 2. At the same time, the aeration pipe 11 aerates the membrane assembly 12. Since there is no sludge accumulation at the bottom of the separation chamber 1 at this time, the sludge that has not accumulated is lifted up during aeration, ensuring that the sludge attached to the membrane assembly 12 can be better cleaned off. Compared with the use of spiral blades for transportation, the use of a rotating barrel 31 with a delivery port 311 for sludge transportation avoids the situation where the sludge remains in the rotating barrel 31 and cannot be discharged, and ensures that when the aeration pipe 11 cleans the membrane assembly 12, there is no sludge accumulation at the bottom of the separation chamber 1, thereby improving the cleaning effect of the membrane assembly 12.

[0037] Reference Figure 4 : A scraper 32 is provided in the rotating barrel 31 to rotate around the axis of the rotating barrel 31. The two ends of the scraper 32 are respectively in contact with the inner wall of the rotating barrel 31. When the conveying port 311 is in a vertically upward state, the scraper 32 is in a vertically stationary state. When the conveying port 311 is in a conveying downward state, the scraper 32 is in a rotating state.

[0038] When the delivery port 311 is vertically facing upward, the rotating barrel 31 and the separation chamber 1 are connected to each other, and the sludge in the separation chamber 1 falls into the rotating barrel 31 through the delivery port 311, so that the scraper 32 is in a vertically stationary state, ensuring that the sludge in the separation chamber 1 can smoothly pass through the delivery port 311 into the rotating barrel 31. When the delivery port 311 needs to switch its state, the scraper 32 rotates 180 degrees synchronously with the rotating barrel 31, that is, when the rotating barrel 31 drives the delivery port 311 to rotate from the vertical upward state to the vertical downward state, the scraper 32 is in a relatively stationary state in the rotating barrel 31. When the delivery port 311 rotates to the vertical downward state, the scraper 32 starts to rotate in the rotating barrel 31. As the scraper 32 rotates, some of the sludge remaining in the rotating barrel 31 can be scraped off by the scraper 32, and the scraped sludge is discharged into the reaction chamber 2 through the delivery port 311.

[0039] Reference Figure 4: A first electromagnet 33 is fixedly installed on the side wall of the rotating barrel 31. The first electromagnet 33 and the conveying port 311 are symmetrically arranged about the axis of the rotating barrel 31. When the conveying port 311 is vertically facing upward, the first electromagnet 33 is energized and attracts one end of the scraper 32.

[0040] The scraper 32 is kept in a vertical state. The scraper 32 in the vertical state divides the conveying port 311 into two parts evenly, ensuring that when the sludge falls from the conveying port 311 into the rotating barrel 31, it will not be stuck due to the tilt of the scraper 32, ensuring that the sludge can smoothly fall into the rotating barrel 31.

[0041] Reference Figure 5 and Figure 6 : A driving unit 4 for driving the rotating barrel 31 to rotate is provided on one side of the rotating barrel 31. The driving unit 4 includes a driving sleeve 41 that moves along the axial direction of the rotating groove. The driving sleeve 41 can rotate around its own axis. When the end of the driving sleeve 41 contacts the rotating barrel 31, the rotating barrel 31 and the scraper 32 rotate synchronously with the driving sleeve 41. When the end of the driving sleeve 41 does not contact the rotating barrel 31, only the scraper 32 rotates synchronously with the driving sleeve 41.

[0042] Reference Figures 8-10 : A moving unit 42 for driving the driving sleeve 41 is provided on the periphery of the driving sleeve 41. The moving unit 42 includes a pushing sleeve 421 fixedly provided at the end of the driving sleeve 41. A first magnetic ring 422 is provided on the periphery of the pushing sleeve 421. A second magnetic ring 423 is provided on the periphery of the driving sleeve 41. A second electromagnet 424 and a third electromagnet 425 are respectively provided on both sides away from each other of the first magnetic ring 422 and the second magnetic ring 423.

[0043] When the driving sleeve 41 is driven to move, one of the second electromagnet 424 and the third electromagnet 425 is energized. When the second electromagnet 424 is energized, the second electromagnet 424 attracts the first magnetic ring 422, and the driving sleeve 41 moves in the direction away from the rotating barrel 31. When the third electromagnet 425 is energized, the third electromagnet 425 attracts the second magnetic ring 423, and the driving sleeve 41 rotates in the direction of the rotating barrel 31.

[0044] Reference Figure 9 and Figure 10 : A contact assembly 413 is fixedly provided at the end of the scraper 32, and a first friction ring 411 that can contact and cooperate with the end of the contact assembly 413 away from the scraper 32, and a second friction ring 412 that contacts and cooperates with the end of the rotating barrel 31 are provided on the driving sleeve 41.

[0045] When the driving sleeve 41 moves along the axial direction of the rotating groove, after the second friction ring 412 contacts and cooperates with the end inside the rotating barrel 31, the first friction ring 411 also contacts and cooperates with the contact component 413. At this time, when the driving sleeve 41 rotates around its own axis, the first friction ring 411 and the second friction ring 412 use friction force to make the contact component 413 and the rotating barrel 31 rotate synchronously. Since the contact component 413 is fixedly connected to the scraper 32, the scraper 32 and the rotating barrel 31 also rotate synchronously.

[0046] Reference Figure 9 : The contact assembly 413 includes a limiting ring 4131 arranged at one end of the scraper 32 and rotating synchronously with the scraper 32. A sliding sleeve 4132 is provided on the side of the limiting ring 4131 away from the scraper 32 and moves along the axis of the rotating barrel 31. There is a gap between the sliding sleeve 4132 and the limiting ring 4131, and a spring 4133 is provided in the gap. When the second friction ring 412 contacts and cooperates with the end of the rotating barrel 31, the first friction ring 411 contacts and cooperates with the sliding sleeve 4132 and the spring 4133 is in a compressed state.

[0047] An extension shaft 4134 is fixedly provided at the end of the scraper 32 along the axial direction of the rotating barrel 31, a limiting ring 4131 is fixedly provided on the extension shaft 4134, a sliding sleeve 4132 is slidingly provided on the end of the extension shaft 4134 away from the scraper 32, and the sliding sleeve 4132 rotates synchronously with the extension shaft 4134, and the two ends of the spring 4133 are fixedly connected to the limiting ring 4131 and the sliding sleeve 4132 respectively. When the second friction ring 412 contacts and cooperates with the end of the rotating barrel 31, the first friction ring 411 contacts and cooperates with the sliding sleeve 4132 and the spring 4133 is in a compressed state, ensuring that the first friction ring 411 will not be unable to drive the scraper 32 to rotate due to wear after long-term use, thereby avoiding the situation where the scraper 32 cannot rotate synchronously with the rotating barrel 31.

[0048] Reference Figure 10 : A third friction ring 414 is fixedly arranged in the inner ring of the driving sleeve 41. The third friction ring 414 can contact and cooperate with the limiting ring 4131. After the third friction ring 414 contacts and cooperates with the limiting ring 4131, the limiting ring 4131 rotates synchronously with the third friction ring 414.

[0049] When the second friction ring 412 contacts and cooperates with the end of the rotating barrel 31, the driving sleeve 41 rotates around its own axis, and the second friction ring 412 drives the rotating barrel 31 to rotate synchronously. At the same time, the first friction ring 411 also contacts and cooperates with the end of the sliding sleeve 4132, and the first friction ring 411 drives the sliding sleeve 4132 to rotate synchronously. However, at this time, the third friction ring 414 and the limiting ring 4131 are in a non-contact state. Driven by the first friction ring 411 and the second friction ring 412, the rotating barrel 31 drives the conveying port 311 to rotate from a vertically upward state to a vertically downward state. At this time, the driving sleeve 41 stops rotating. The driving sleeve 41 moves toward the end away from the rotating sleeve under the action of the moving unit 42. At this time, the third friction ring 414 contacts and cooperates with the limiting ring 4131, while the first friction ring 411 is out of contact with the sliding sleeve 4132, and the second friction ring 412 is also out of contact with the end of the rotating barrel 31. At this time, the scraper 32 can rotate in the rotating barrel 31.

[0050] Reference Figure 4 and Figure 5 : A clamping unit 5 for clamping the rotating barrel 31 is provided on one side of the rotating groove. The clamping unit 5 includes a clamping plate 51 which is arranged on one side of the rotating groove and moves horizontally. When the clamping plate 51 contacts the side wall of the rotating barrel 31, the rotating barrel 31 cannot rotate.

[0051] The end surface of the clamping plate 51 that contacts the rotating barrel 31 is a curved surface. A linear actuator 52 is provided at the end of the clamping plate 51 for driving the clamping plate 51 to clamp the rotating barrel 31. When the rotating barrel 31 rotates normally, the end of the clamping plate 51 slides with the peripheral wall of the rotating barrel 31. When the delivery port 311 rotates to a vertically downward position, the linear actuator 52 drives the clamping plate 51 to extend and clamp the rotating barrel 31, preventing the rotating barrel 31 from rotating. At this time, when the scraper 32 rotates within the rotating barrel 31, the rotating barrel 31 no longer rotates. The linear actuator 52 is preferably a linear cylinder.

[0052] Reference Figure 10 A driving rod 44 is provided in the pushing sleeve 421 so as to slide along the extending direction of the pushing sleeve 421 . A rotary driver 43 for driving the driving rod 44 is provided at the end of the driving rod 44 . The pushing sleeve 421 rotates synchronously with the driving rod 44 .

[0053] The cross-section of the driving rod 44 is a non-circular structure, the internal cross-section of the pushing sleeve 421 fits with the cross-section of the driving rod 44, the rotary driver 43 and the driving rod 44 do not displace in the horizontal direction, and when the driving sleeve 41 moves under the action of the second electromagnet 424 and the third electromagnet 425, the pushing sleeve 421 is driven to move, and at this time, the pushing sleeve 421 and the driving rod 44 slide together.

[0054] Working principle: When in use, the water inlet pipe 13 introduces wastewater into the separation chamber 1, and then the membrane assembly 12 is started. The membrane assembly 12 extracts the filtered liquid, and the sludge is intercepted by the membrane assembly 12. At this time, the rotating barrel 31 in the sludge discharge unit 3 is in a stopped rotating state, and the conveying port 311 set on the rotating barrel 31 is vertically upward. The rotating barrel 31 is connected with the separation chamber 1 through the conveying port 311. After the sludge is intercepted by the membrane assembly 12, it settles. The settled sludge drops to the bottom of the separation chamber 1 and falls into the rotating barrel 31 through the conveying port 311. As the membrane assembly 12 continues to operate, more and more sludge is intercepted by the membrane assembly 12 and falls into the rotating barrel 31. In order to avoid the sludge in the rotating barrel 31 from overflowing, it is necessary to pre-set the rotation time of the rotating barrel 31 during use, that is, to set the holding time of the conveying port 311 on the rotating barrel 31 in the two states. When the conveying port 311 on the rotating barrel 31 is maintained in the vertical upward state for the set time, the rotating barrel 31 The conveying port 311 is driven to rotate 180 degrees, so that the conveying port 311 switches to a vertical downward state. Since the rotating barrel 31 contains sludge, when the conveying port 311 switches to a vertical downward state as the rotating barrel 31 rotates, the sludge in the rotating barrel 31 can be discharged through the conveying port 311. At this time, the rotating barrel 31 is connected to the reaction chamber 2 through the conveying port 311, and the sludge in the rotating barrel 31 is discharged into the reaction chamber 2 through the conveying port 311. During the process of the sludge being discharged into the reaction chamber 2, the aeration pipe 11 is started. The aeration tube 11 aerates the membrane assembly 12, and the sludge attached to the membrane assembly 12 is shaken off and falls to accumulate at the bottom of the separation chamber 1. Since the separation chamber 1 and the reaction chamber 2 are separated by the rotating barrel 31, the sludge in the reaction chamber 2 cannot directly enter the separation chamber 1. At the same time, when the aeration tube 11 is started, there is no sludge accumulation at the bottom of the separation chamber 1. Therefore, when the aeration tube 11 is aerated, the sludge accumulated at the bottom of the separation chamber 1 will not be lifted, thereby reducing the cleaning effect of the membrane assembly 12. After all the sludge has been discharged into the reaction chamber 2, the rotating barrel 31 rotates 180 degrees again, and the aeration tube 11 stops aeration. The sludge that has fallen from the membrane assembly 12 accumulates at the bottom of the separation chamber 1 and falls into the rotating barrel 31 when the delivery port 311 rotates to a vertically upward position, and the cycle repeats.

[0055] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A high-efficiency sewage treatment device based on a membrane bioreactor, comprising a separation chamber (1) and a reaction chamber (2) arranged vertically from top to bottom; It is characterized by: A rotating trough with a cylindrical structure is horizontally arranged at the lower part of the separation chamber (1), and a rotating barrel (31) is rotatably arranged in the rotating trough. The axis of the rotating barrel (31) is colinear with the axis of the rotating trough. The rotating barrel (31) separates the separation chamber (1) and the reaction chamber (2). A delivery port (311) is opened on the peripheral wall of the rotating barrel (31). The delivery port (311) has two states: vertically facing upward and vertically facing downward. When the delivery port (311) is vertically facing upward, the sludge in the separation chamber (1) enters the rotating barrel (31) through the delivery port (311). When the delivery port (311) is vertically facing downward, the sludge in the rotating barrel (31) is discharged into the reaction chamber (2) through the delivery port (311). A scraper (32) is provided in the rotating barrel (31) and rotates around the axis of the rotating barrel (31). Both ends of the scraper (32) are in contact with the inner wall of the rotating barrel (31). When the delivery port (311) is in a vertically upward state, the scraper (32) is in a vertically stationary state. When the delivery port (311) is in a vertically downward state, the scraper (32) is in a rotating state. A first electromagnet (33) is fixedly provided on the side wall of the rotating barrel (31). The first electromagnet (33) and the conveying port (311) are symmetrically arranged about the axis of the rotating barrel (31). When the conveying port (311) is vertically facing upward, the first electromagnet (33) is energized and attracts one end of the scraper (32). A driving unit (4) for driving the rotating barrel (31) to rotate is provided on one side of the rotating barrel (31). The driving unit (4) includes a driving sleeve (41) that moves along the axis of the rotating groove. The driving sleeve (41) can rotate around its own axis. When the end of the driving sleeve (41) contacts the rotating barrel (31), the rotating barrel (31) and the scraper (32) rotate synchronously with the driving sleeve (41). When the end of the driving sleeve (41) does not contact the rotating barrel (31), only the scraper (32) rotates synchronously with the driving sleeve (41). A moving unit (42) for driving the driving sleeve (41) is provided on the periphery of the driving sleeve (41), the moving unit (42) comprising a pushing sleeve (421) fixedly provided at the end of the driving sleeve (41), a first magnetic ring (422) provided on the peripheral fixed sleeve of the pushing sleeve (421), a second magnetic ring (423) provided on the peripheral fixed sleeve of the driving sleeve (41), and a second electromagnet (424) and a third electromagnet (425) provided on both sides of the first magnetic ring (422) and the second magnetic ring (423) away from each other. A contact assembly (413) is fixedly provided at the end of the scraper (32); a first friction ring (411) capable of contacting and cooperating with an end of the contact assembly (413) away from the scraper (32) and a second friction ring (412) capable of contacting and cooperating with the end of the rotating barrel (31) are provided on the driving sleeve (41); The contact assembly (413) includes a limiting ring (4131) provided at one end of the scraper (32) and rotating synchronously with the scraper (32); a sliding sleeve (4132) is provided on a side of the limiting ring (4131) away from the scraper (32) and movable along the axis of the rotating barrel (31); a gap exists between the sliding sleeve (4132) and the limiting ring (4131); a spring (4133) is provided in the gap; when the second friction ring (412) contacts and engages with the end of the rotating barrel (31), the first friction ring (411) contacts and engages with the sliding sleeve (4132), and the spring (4133) is in a compressed state; A third friction ring (414) is fixedly arranged in the inner ring of the drive sleeve (41). The third friction ring (414) can be in contact with the limiting ring (4131). After the third friction ring (414) and the limiting ring (4131) are in contact with each other, the limiting ring (4131) rotates synchronously with the third friction ring (414).

2. The high-efficiency sewage treatment equipment based on membrane bioreactor according to claim 1 is characterized in that: A clamping unit (5) for clamping the rotating barrel (31) is provided on one side of the rotating groove. The clamping unit (5) includes a clamping plate (51) that is arranged on one side of the rotating groove and moves in a horizontal direction. When the clamping plate (51) contacts the side wall of the rotating barrel (31), the rotating barrel (31) cannot rotate.

3. The high-efficiency sewage treatment equipment based on membrane bioreactor according to claim 1 is characterized in that: A driving rod (44) is slidably provided in the pushing sleeve (421) along the extending direction of the pushing sleeve (421), and a rotary driver (43) for driving the driving rod (44) is provided at the end of the driving rod (44). The pushing sleeve (421) rotates synchronously with the driving rod (44).

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