MBR (Membrane Bioreactor) membrane backwashing tank

Abstract

The utility model provides an MBR (Membrane Bioreactor) membrane backwashing tank, which relates to the technical field of sewage treatment and comprises a tank body, the top of the tank body is provided with a seal head, the bottom of the tank body is provided with a water outlet, and the seal head is provided with a water inlet communicated with the inside of the tank body; the rotating rod is rotationally connected to the top of the sealing head, a plurality of through holes are formed in the top of the sealing head in the circumferential direction, a plurality of connecting ropes are arranged on the outer wall of the rotating rod in the circumferential direction, each connecting rope corresponds to the corresponding through hole, the free end of each connecting rope penetrates through the corresponding through hole and extends into the tank body, and a fixing rod is arranged at the free end of each connecting rope; scrapers making contact with the inner wall of the tank body are arranged on the fixing rods, and the multiple scrapers abut against one another end to end. And the limiting assembly is arranged on the rotating rod and used for limiting rotation of the rotating rod. According to the utility model, the inside of the backwashing tank can be cleaned, so that the influence on the washing efficiency of the MBR membrane caused by dirt generated due to long-term non-cleaning in the tank is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an MBR membrane backwash tank. Background Art

[0002] MBR, also known as membrane bioreactor, is a novel water treatment technology that combines multiple units and is primarily used in wastewater treatment and water resource reuse. Currently, during the use of MBR membranes, a large amount of dirt and impurities gradually accumulate on the membranes, reducing the MBR membrane's filtration efficiency. Therefore, the MBR membranes need to be regularly flushed to remove dirt and impurities from the membranes and avoid affecting their filtration efficiency. Flushing the MBR membranes includes backwashing, which is the reverse flushing of the MBR membranes to more thoroughly remove dirt and impurities. Backwashing requires the use of a backwash tank, which stores the flushing water used to flush the MBR membranes. If the flushing water in the backwash tank is stored for too long, dirt and impurities are likely to form on the inner walls of the tank. If this water is not cleaned, the flushing water in the backwash tank will be pumped out for use, and the dirt and other impurities contained in it will be washed onto the MBR membranes, thus affecting the performance of the MBR membranes. Utility Model Content

[0003] After the MBR membrane is fully submerged, the water in the MBR tank will be drained out, and the water in the MBR tank will be drained out quickly.

[0004] The technical solution adopted in this utility model is:

[0005] An MBR membrane backwash tank is provided, comprising:

[0006] The tank body is provided with a head on the top of the tank body and a drain outlet on the bottom. The head is provided with a water inlet connected to the interior of the tank body; the rotating rod is rotatably connected to the top of the head, and a plurality of through holes are circumferentially provided on the top of the head. A plurality of connecting ropes are circumferentially provided on the outer wall of the rotating rod, and each connecting rope corresponds to each through hole. The free end of each connecting rope passes through the through hole and extends to the interior of the tank body. A fixing rod is provided on the free end of each connecting rope, and a scraper in contact with the inner wall of the tank body is provided on the fixing rod, and the multiple scrapers are abutted against each other at the head and tail; a limiting assembly is provided on the rotating rod to limit the rotation of the rotating rod.

[0007] In some embodiments of the present invention, the limiting assembly includes a fixing ring, a slide cylinder and an insertion rod. The fixing ring is arranged on the outer wall of the rotating rod, and a socket is provided on the fixing ring. The insertion rod is inserted into the socket and can pass through the socket. A fixing hole that cooperates with the insertion rod is provided circumferentially on the top of the head.

[0008] In some embodiments of the present invention, a limiting rod is provided at one end of each fixing rod facing the central axis of the tank body, the multiple limiting rods are connected end to end in sequence, and both ends of each limiting rod are connected to each scraper.

[0009] In some embodiments of the present invention, a plurality of fixing seats are circumferentially provided on the top of the head, each fixing seat is arranged close to each through hole, each fixing seat is rotatably connected to a fixed pulley, and each connecting rope is wound around the corresponding fixed pulley.

[0010] In some embodiments of the present invention, the cross section of each scraper is trapezoidal.

[0011] In some embodiments of the present invention, a plurality of limiting blocks are provided circumferentially on the outer wall of the rotating rod to limit the sliding of the connecting rope on the rotating rod.

[0012] In some embodiments of the present invention, a float valve communicating with the interior of the tank is provided on the water inlet.

[0013] In some embodiments of the present invention, the vertical distance between each limiting rod and the inner wall of the tank body is smaller than the vertical distance between the water inlet and the inner wall of the tank body.

[0014] The beneficial effects of the utility model are:

[0015] By rotating the rotating rod, the rotating rod will drive the connecting rope arranged on the outer wall of the rotating rod to move. The moving connecting rope can pull the fixed rod located in the tank body to pull up the scraper in the tank body, and finally make the scraper be at the inner top position of the head. Then the rotating rod is rotated and limited by the limit assembly. At this time, it is not necessary to clean the inner wall of the tank body. That is, tap water is usually introduced into the water inlet on the head and then discharged through the drain port on the tank body to flush the MBR membrane. When the inner wall of the tank body needs to be cleaned, the limit assembly is first adjusted so that the rotation of the rotating rod is not restricted by the limit assembly. Then, the rotating rod is rotated. The rotation of the rotating rod can also loosen the connecting rope arranged on the outer wall of the rotating rod in the opposite direction of rotation. During the loosening of the connecting rope, the fixed rod at the other end of the connecting rope will gradually slide down inside the tank body as the connecting rope loosens. As the fixed rod slides down, the scraper on the fixed rod can clean the dirt on the inner wall of the tank body and finally discharge it from the drain port on the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a cross-sectional view of the MBR membrane backwash tank in the longitudinal section;

[0018] Figure 2 It is a cross-sectional view of the MBR membrane backwash tank;

[0019] Figure 3 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0020] Reference numerals:

[0021] 1-tank body, 10-drain outlet, 2-head, 20-water inlet, 21-rotating rod, 22-through hole, 23-connecting rope, 24-fixing rod, 25-scraper, 26-limiting rod, 27-fixing ring, 270-jack, 271-insertion rod, 28-fixing hole, 29-fixing seat, 290-fixed pulley. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0024] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0025] Example

[0026] like Figure 1As shown, this embodiment provides an MBR membrane backwash tank, comprising:

[0027] The tank body 1 has a head 2 on the top and a drain 10 on the bottom. The head 2 is provided with a water inlet 20 communicating with the interior of the tank body 1.

[0028] A rotating rod 21 is rotatably connected to the top of the head 2. A plurality of through holes 22 are circumferentially formed on the top of the head 2. A plurality of connecting ropes 23 are circumferentially formed on the outer wall of the rotating rod 21. Each connecting rope 23 corresponds to each through hole 22. The free end of each connecting rope 23 passes through the through hole 22 and extends into the interior of the tank body 1. A fixing rod 24 is provided on the free end of each connecting rope 23. The fixing rod 24 is provided with a scraper 25 that contacts the inner wall of the tank body 1. The multiple scrapers 25 abut against each other at their ends.

[0029] The limiting assembly is provided on the rotating rod 21 and is used to limit the rotation of the rotating rod 21 .

[0030] The head 2 is detachably mounted on the tank body 1, and a sealing ring can be used to connect the head 2 and the tank body 1. A water inlet 20 is provided on the head 2 for entering tap water for storage, and a drain outlet 10 discharges the tap water in the tank body 1 and flushes the MBR membrane. The rotating rod 21 is rotatably connected to the center of the top of the head 2, and the through holes 22 are circumferentially provided on the head 2, and each through hole 22 needs to be close to one side of the inner wall of the tank body 1, that is, the inner wall of the tank body 1 is extended in the vertical direction and will not intersect with the through holes 22 provided on the head 2, and each through hole 22 on the head 2 is located between the inner wall of the tank body 1 and the rotating rod 21 in the vertical direction. The main purpose is to prevent the fixed rod 24 connected by the connecting rope 23 from shaking greatly when it is in the tank body 1 and scraping the inner wall of the tank body 1. One end of the scraper 25 contacts the inner wall of the tank body 1 and is used to scrape off the dirt on the inner wall of the tank body 1. The two ends of the scraper 25 abut against the adjacent scrapers 25. The purpose is that when the adjacent scrapers 25 move inside the tank body 1, they can restrict each other to prevent deviation and affect the efficiency of removing dirt on the inner wall of the tank body 1.

[0031] When in use, the limiting effect of the rotating rod 21 is adjusted by the limiting component. For example, when the rotating rod 21 needs to be rotated to adjust the scraper 25 to clean the dirt on the inner wall of the tank body 1, the limiting component is adjusted to allow the rotating rod 21 to rotate. At this time, the initial state of the rotating rod 21 is that it has been restricted by the limiting component, and the scraper 25 in the tank body 1 is located at the top of the head 2. The rotating rod 21 is rotated again to make the rotating rod 21 rotate, and the scraper 25 is moved from the position at the head 2 to the top of the head 2 through the connecting rope 23. The scraper 25 is lowered to the position of the inner top. During the process of the scraper 25 descending, the scraper 25 will scrape the dirt on the inner wall of the tank body 1. After the rotating rod 21 cannot rotate, the scraper 25 is located at the inner bottom of the tank body 1. Then continue to rotate the rotating rod 21, and pull up the scraper 25 located at the inner bottom of the tank body 1 through the connecting rope 23, so that the scraper 25 is located at the inner top of the head 2. Then limit the rotating rod 21 through the limiting component to prevent the rotating rod 21 from rotating, and the scraping and cleaning of the dirt on the inner wall of the tank body 1 can be completed.

[0032] Further, such as Figure 1 and Figure 3 As shown, the limiting assembly includes a fixing ring 27, a slide cylinder and an insert rod 271. The fixing ring 27 is arranged on the outer wall of the rotating rod 21, and a socket 270 is provided on the fixing ring 27; the insert rod 271 is inserted into the socket 270, and the insert rod 271 can pass through the socket 270, and a fixing hole 28 is provided circumferentially on the top of the head 2 to cooperate with the insert rod 271.

[0033] The fixing ring 27 is arranged on the outer wall of the rotating rod 21 and close to the top of the rotating rod 21, that is, the fixing ring 27 and the top of the rotating rod 21 are arranged flush with each other, and a socket 270 is opened on the fixing ring 27, and the socket 270 is used to insert the plug rod 271, and the plug rod 271 inserted into the socket 270 can be adapted to the fixing hole 28 opened circumferentially on the head 2 to achieve the effect of limiting the rotation of the rotating rod 21.

[0034] During use, the rod 271 on the socket 270 is adjusted so that the rod 271 and the fixing hole 28 on the head 2 are adapted to each other. At this time, the rotating rod 21 will not rotate because the rod 271 is inserted into the fixing hole 28. This is mostly the case when the scraper 25 is at the top or bottom of the tank body 1 and no longer needs to be rotated. When the rod 271 is not inserted into the fixing hole 28, the rotating rod 21 will not be restricted by the rod 271 and can rotate on the head 2. This is mostly the case when the position of the scraper 25 needs to be adjusted by rotating the rotating rod 21. It is worth noting that during the rotation of the rotating rod 21, in order to prevent the rod 271 from affecting the connecting rope 23, the rod 271 needs to be removed from the socket 270 and reinserted after the rotation adjustment of the rotating rod is completed.

[0035] Further, such as Figure 1and Figure 2 As shown, a limiting rod 26 is provided at one end of each fixing rod 24 facing the central axis of the tank body 1 , and the plurality of limiting rods 26 are connected end to end in sequence, and both ends of each limiting rod 26 are connected to each scraper 25 .

[0036] A limiting rod 26 is provided at one end of the fixing rod 24, and a scraper 25 is provided at the other end. The scraper 25 contacts the inner wall of the tank body 1 and is used to remove dirt from the inner wall of the tank body 1. The overall shape is an I-shaped or I-shaped with the scraper 25 in an arc shape, which is specifically modified according to the shape of the tank body 1. The limiting rod 26 is used to limit the position of the scraper 25 within the tank body 1. The interconnection between adjacent limiting rods 26 can prevent the scraper 25, which is only suspended by the connecting rope 23, from wobbling inside the tank body 1, affecting the scraper 25's efficiency in cleaning the inner wall of the tank body 1.

[0037] Further, such as Figure 1 As shown, a plurality of fixing seats 29 are circumferentially provided on the top of the head 2. Each fixing seat 29 is arranged near each through hole 22. A fixed pulley 290 is rotatably connected to each fixing seat 29, and each connecting rope 23 is wound around the corresponding fixed pulley 290.

[0038] The number of fixing seats 29 corresponds to the number of through holes 22. The fixing seats 29 are arranged on the top of the head 2, close to the through holes 22, and on the connecting line between the connecting rope 23 and the through holes 22. That is, the portion of the connecting rope 23 from the rotating rod 21 to the through holes 22 will not deviate laterally when it is wound around the fixed pulley 290 on the fixing seat 29. It is worth noting that the lateral deviation of the connecting rope 23 described here refers to the vertical deviation of the connecting rope 23 toward the bottom of the tank body 1 after it is wound around the fixed pulley 290, not the lateral deviation. The purpose is to guide the connecting rope 23.

[0039] Further, such as Figure 1 As shown, the cross section of each scraper 25 is trapezoidal.

[0040] The scraper 25 has a trapezoidal shape when cut along the central axis of the can body 1 , and the trapezoid is an isosceles trapezoid.

[0041] During use, the rotation of the rotating rod 21 can drive the scraper 25 to move up and down along the central axis of the tank body 1 on the inner wall of the tank body 1 through the connecting rope 23, so that the scraper 25 can clean back and forth on the inner wall. Therefore, the cross-section of the scraper 25 is made into an isosceles trapezoidal cross-section so that both ends can scrape the inner wall of the tank body 1, thereby improving the efficiency of the scraper 25 in clearing dirt on the inner wall of the tank body 1.

[0042] Further, such as Figure 1As shown, a plurality of limit blocks are provided on the outer wall of the rotating rod 21 in the circumferential direction to limit the connecting rope 23 from sliding on the rotating rod 21 .

[0043] The number of limit blocks is the same as the number of connecting ropes 23. The position of the limit blocks on the rotating rod 21 should be such that when the rotating rod 21 rotates, the connecting ropes 23 driven by the rotating rod 21 are wound around the outer wall of the rotating rod 21. At this time, the limit blocks need to be below the connecting ropes 23. The purpose is to prevent the connecting ropes 23 from being entangled with each other during the rotation of the rotating rod 21, thereby affecting the movement of the scraper 25.

[0044] Furthermore, a float valve communicating with the interior of the tank body 1 is provided on the water inlet 20 .

[0045] A float valve is provided on the water inlet 20. The float valve is a valve composed of a crank arm and a float ball, and can be used to automatically control the level of the flushing water in the tank 1. It has the characteristics of simple maintenance, flexibility and durability, high liquid level control accuracy, the water level is not affected by water pressure, and it opens and closes tightly without leaking.

[0046] Furthermore, the vertical distance between each limiting rod 26 and the inner wall of the tank body 1 is smaller than the vertical distance between the water inlet and the inner wall of the tank body 1 .

[0047] When the scraper 25 moves inside the tank body 1 and cleans, and a float valve is used on the water inlet 20, the vertical distance between the limit rod 26 on the scraper 25 and the inner wall of the tank body 1 must be smaller than the vertical distance between the water outlet end of the float valve and the inner wall of the tank body 1 to avoid the scraper 25 being affected by the float valve during use.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. The embodiments and features of the embodiments of this application may be combined arbitrarily without conflict. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An MBR membrane backwash tank, characterized in that: include: A tank body, wherein the top of the tank body is provided with a head, the bottom is provided with a drain outlet, and the head is provided with a water inlet connected to the interior of the tank body; a rotating rod, wherein the rotating rod is rotatably connected to the top of the head, and a plurality of through holes are provided circumferentially on the top of the head, and a plurality of connecting ropes are circumferentially provided on the outer wall of the rotating rod, each of the connecting ropes corresponds to each of the through holes, and the free end of each connecting rope passes through the through hole and extends to the interior of the tank body, and a fixing rod is provided on the free end of each connecting rope, and a scraper is provided on the fixing rod to contact the inner wall of the tank body, and the multiple scrapers abut each other at the head and tail; a limit assembly, wherein the limit assembly is arranged on the rotating rod and is used to limit the rotation of the rotating rod.

2. The MBR membrane backwash tank according to claim 1, characterized in that: The limiting assembly includes a fixing ring and an insertion rod. The fixing ring is arranged on the outer wall of the rotating rod, and a socket is provided on the fixing ring. The insertion rod is inserted into the socket and can pass through the socket. A fixing hole that cooperates with the insertion rod is provided circumferentially on the top of the head.

3. The MBR membrane backwash tank according to claim 2, characterized in that: A limiting rod is provided at one end of each fixing rod facing the central axis of the tank body, and the plurality of limiting rods are connected end to end in sequence, and both ends of each limiting rod are connected to each scraper.

4. The MBR membrane backwash tank according to claim 3, characterized in that: A plurality of fixing seats are also circumferentially provided on the top of the head, each of the fixing seats is arranged close to each of the through holes, a fixed pulley is rotatably connected to each of the fixing seats, and each of the connecting ropes is wound around the corresponding fixed pulley.

5. The MBR membrane backwash tank according to claim 1 or 4, characterized in that: The cross section of each scraper is trapezoidal.

6. The MBR membrane backwash tank according to claim 1, characterized in that: A plurality of limiting blocks are provided on the outer wall of the rotating rod in the circumferential direction for limiting the sliding of the connecting rope on the rotating rod.

7. The MBR membrane backwash tank according to claim 5, characterized in that: The water inlet is provided with a float valve which is connected with the interior of the tank body.

8. The MBR membrane backwash tank according to claim 7, characterized in that: The vertical distance between each of the limiting rods and the inner wall of the tank body is smaller than the vertical distance between the water inlet valve and the inner wall of the tank body.

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