Sludge deposition prevention membrane bioreactor membrane pool capable of uniformly distributing water

Abstract

The utility model relates to a sludge deposition prevention membrane bioreactor membrane tank capable of uniformly distributing water, which comprises a membrane tank body and further comprises a guide wall arranged in a cavity of the membrane tank body, the guide wall divides the interior of the cavity of the membrane tank body into a first unit tank and a second unit tank, a water inlet and distribution area is arranged in the first unit tank, and a membrane area is arranged in the second unit tank; a slope, a sludge collecting tank and a water inlet distribution culvert are arranged in the membrane area; the slope is arranged at the bottom of the second unit pool and gradually inclines downwards in the direction close to the first unit pool; an opening of the sludge collecting groove is butted with the bottom end of the slope; the water inlet distribution culverts are symmetrically arranged on the two sides of the slope, a plurality of water distribution holes are formed in the distribution surfaces, opposite to each other, of the water inlet distribution culverts on the two sides, cavity channels are formed in the water inlet distribution culverts, and the water distribution holes are communicated with the water inlet distribution area through the inner cavity channels of the water inlet distribution culverts. And the membrane tank can prevent bottom sludge accumulation and realize uniform water distribution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of membrane pool of bioreactor, in particular to a membrane pool of bioreactor for preventing sludge accumulation with uniform water distribution. BACKGROUND

[0002] With the development of MBR membrane bioreactor technology, it is gradually found that even if a structure for discharging sludge is arranged at the bottom of the membrane pool of bioreactor, the problem of sludge accumulation cannot be avoided. The accumulation of sludge at the bottom of the membrane pool will block the aeration head of the membrane group, so the bottom of the membrane pool must be cleaned frequently, consuming a lot of manpower and material resources. In addition, the uneven water distribution in the membrane pool will cause uneven pollution of the membrane group in the membrane pool, so that the membrane group far from the water distribution port in the traditional membrane pool is polluted quickly and severely. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a membrane pool of bioreactor for preventing sludge accumulation with uniform water distribution in view of the problem of sludge deposition at the bottom of the membrane pool of bioreactor.

[0004] A membrane pool of bioreactor for preventing sludge accumulation with uniform water distribution comprises a membrane pool body, and further comprises a flow guide wall arranged in the cavity of the membrane pool body, the flow guide wall separates the membrane pool body into a first unit pool and a second unit pool, the cavity in the first unit pool is arranged as a water inlet distribution area, and the cavity in the second unit pool is arranged as a membrane area.

[0005] A slope, a sludge collecting groove and a water inlet distribution culvert are arranged in the membrane area.

[0006] The sludge collecting groove is arranged at one end of the bottom of the second unit pool close to the first unit pool.

[0007] The slope is arranged at the bottom of the second unit pool, the slope gradually inclines downward along the direction close to the sludge collecting groove, and the bottom end of the slope is connected to the opening of the sludge collecting groove. The water inlet distribution culverts are symmetrically arranged on both sides of the slope, a plurality of water distribution holes are arranged on the distribution surfaces of the water inlet distribution culverts arranged oppositely, and a cavity is arranged in the water inlet distribution culvert. The water distribution holes are communicated with the water inlet distribution area through the cavity.

[0008] In one of the embodiments, the first unit pool and the second unit pool are both arranged as rectangles.

[0009] A backflow port is arranged on the pool wall of the second unit pool away from the first unit pool, and a water inlet port is arranged on the pool wall of the first unit pool away from the second unit pool.

[0010] In one of the embodiments, the water inlet distribution culverts are arranged on the two side walls of the second unit pool along the length direction of the second unit pool, and the water distribution holes are uniformly distributed on the distribution surfaces along the length direction of the water inlet distribution culverts.

[0011] In one embodiment, the distribution surface is gradually inclined downward along the direction close to the slope from the top of the water inlet distribution culvert, and the water distribution holes are uniformly arranged on the distribution surface.

[0012] In one embodiment, the water inlet distribution culvert is arranged in a right-angled trapezoid, and the slope of the right-angled trapezoid is arranged as the distribution surface, and the distribution surfaces on the two sides are oppositely arranged.

[0013] In one embodiment, the water distribution holes on the same distribution surface are all arranged on the same horizontal plane.

[0014] Alternatively, the water distribution holes on the same distribution surface are all arranged on an inclined plane, and the inclined plane is parallel to the surface of the slope.

[0015] In one embodiment, the water distribution holes on the two distribution surfaces are symmetrically arranged.

[0016] In one embodiment, the diameters of all the water distribution holes are consistent.

[0017] In one embodiment, the bottom wall of the second unit pool is higher than the bottom wall of the sludge collecting groove.

[0018] In one embodiment, the bottom wall of the first unit pool is consistent with the bottom wall of the second unit pool.

[0019] The above-mentioned uniform water distribution anti-sludge accumulation membrane bioreactor membrane pool comprises a membrane pool body, and further comprises a flow guide wall arranged in the cavity of the membrane pool body, which divides the cavity of the membrane pool body into a first unit pool and a second unit pool, the first unit pool is arranged as a water inlet distribution area, and the second unit pool is arranged as a membrane area; the membrane area is provided with a slope, a sludge collecting groove and a water inlet distribution culvert; the sludge collecting groove is arranged at one end of the bottom of the second unit pool close to the first unit pool. The slope is arranged at the bottom of the second unit pool and gradually inclined downward along the direction close to the sludge collecting groove; the opening of the sludge collecting groove is connected to the bottom end of the slope. The water inlet distribution culverts are symmetrically arranged on the two sides of the slope, a plurality of water distribution holes are arranged on the oppositely arranged distribution surfaces of the two water inlet distribution culverts, and a cavity is arranged in the water inlet distribution culvert, and the water distribution holes are communicated with the water inlet distribution area through the cavity. When the water is uniformly distributed through the water distribution holes, the water flow out of the water distribution holes has a certain flow rate, which can disturb and flush the sludge deposited on the bottom slope of the membrane area, the disturbance of the water flow makes the sludge resuspended, and the combination of the water flow and the bottom slope of the pool can flush the settled sludge into the sludge collecting groove, thereby preventing the accumulation of sludge at the bottom of the membrane pool. These two advantages make the aeration head of the membrane group not easy to be blocked, improve the aeration efficiency, inhibit the accumulation of sludge in the membrane group, and reduce the membrane pollution. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a side view of the uniform water distribution anti-sludge accumulation membrane bioreactor membrane pool provided by the embodiments of the present application.

[0021] Figure 2 A top view of a membrane pond of a uniform water distribution and sludge accumulation prevention membrane bioreactor provided by an embodiment of the present application.

[0022] Figure 3 A front view of a membrane pond of a uniform water distribution and sludge accumulation prevention membrane bioreactor provided by an embodiment of the present application.

[0023] Figure 4 A back view of a membrane pond of a uniform water distribution and sludge accumulation prevention membrane bioreactor provided by an embodiment of the present application.

[0024] Reference Signs:

[0025] 1 - membrane pond body, 2 - flow guide wall, 3 - first unit pond, 4 - second unit pond, 5 - water inlet distribution area, 6 - membrane area, 7 - slope, 8 - sludge collection tank, 9 - water distribution hole, 10 - water inlet distribution culvert, 11 - backflow port, 12 - water inlet port, 13 - distribution surface. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways beyond the specific embodiments described herein, and it is understood that similar improvements can be made by those skilled in the art without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if there are terms "a plurality of", the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0029] In the present application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixation" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If there is, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration, and do not represent the only implementation.

[0032] Referring to Figures 1-4 the drawings, Figure 1 a side view of a uniform water distribution and anti-sludge accumulation membrane bioreactor membrane tank provided by an embodiment of the present application, Figure 2 a top view of a uniform water distribution and anti-sludge accumulation membrane bioreactor membrane tank provided by an embodiment of the present application, Figure 3 a front view of a uniform water distribution and anti-sludge accumulation membrane bioreactor membrane tank provided by an embodiment of the present application,Figure 4 A back view of a uniform water distribution and sludge accumulation prevention membrane bioreactor membrane tank provided by an embodiment of the present application includes a uniform water distribution and sludge accumulation prevention membrane bioreactor membrane tank, which includes a membrane tank body 1 and further includes: a flow guide wall 2 arranged in the cavity of the membrane tank body 1, the flow guide wall 2 separates the membrane tank body 1 into a first unit tank 3 and a second unit tank 4, the first unit tank 3 is composed of the water inlet tank wall and part of the side wall of the membrane tank body 1, the second unit tank 4 is composed of the reflux inlet tank wall and part of the side wall, and the first unit tank 3 and the second unit tank 4 share the flow guide wall 2 as an intermediate wall. The cavity in the first unit tank 3 is arranged as a water inlet distribution area 5, and the cavity in the second unit tank 4 is arranged as a membrane area 6. The water inlet distribution area 5 is used to store the process water of the previous stage, and the membrane area 6 is used to realize the function of the membrane bioreactor tank.

[0033] A slope 7, a sludge collecting groove 8 and a water inlet distribution culvert 10 are arranged in the above-mentioned membrane area 6. The sludge collecting groove 8 is arranged at the bottom of the second unit tank 4 close to the end close to the first unit tank 3. The above-mentioned slope 7 is arranged at the bottom of the second unit tank 4, the slope 7 gradually inclines downward along the direction close to the sludge collecting groove 8, the opening of the sludge collecting groove 8 is connected to the bottom end of the slope 7, and is used to receive sludge. The slope 7 extends from the bottom end of the sludge collecting groove 8 to the surface of the tank wall of the membrane area 6 away from the water inlet distribution area 5. The specific arrangement structure of the sludge collecting groove 8 can refer to the prior art, and will not be described here.

[0034] The water inlet distribution culverts 10 are symmetrically arranged on both sides of the slope 7, and a membrane module is installed on the top surface of the water inlet distribution culvert 10. A plurality of water distribution holes 9 are arranged on the distribution surfaces 13 arranged oppositely on the water inlet distribution culverts 10 on both sides, and a cavity is arranged in the water inlet distribution culvert 10, the water distribution holes 9 are communicated with the water inlet distribution area 5 through the cavity, and the specific cavity is provided with a water inlet on the flow guide wall 2, so as to be communicated with the water inlet distribution area 5.

[0035] The above-mentioned water distribution holes 9 are uniformly distributed on the distribution surfaces 13 along the length direction of the water inlet distribution culvert 10, and the water distribution holes 9 on both sides are mirror-symmetric, so that the water is uniformly inlet into the membrane area 6, the outlet flow of the plurality of water distribution holes 9 is consistent, the water distribution of the membrane area 6 is uniform, the pollution of the internal membrane module is balanced, and the cleaning cycle and service life of the membrane module are prolonged.

[0036] And the distribution surfaces 13 on both sides are arranged above the slope 7 on both sides, the sludge deposited on the upper part of the slope 7 is disturbed and washed during water distribution, the sludge is prevented from being deposited on the bottom, and the aeration head at the bottom of the membrane module is prevented from being blocked.

[0037] The application separates the water inlet distribution area 5 from the membrane area 6, and distributes the water in the water inlet distribution area 5 through the water distribution holes 9 to the two sides of the membrane area 6. When the water is evenly distributed through the water distribution holes 9, the water flow out of the water distribution holes 9 has a certain flow rate, which can disturb and flush the sludge deposited on the slope 7 at the bottom of the membrane area 6. The disturbance of the water flow can resuspend the sludge, and the water flow combined with the slope 7 at the bottom of the pool can flush the settled sludge into the sludge collecting tank 8, preventing the accumulation of sludge at the bottom of the membrane pool 6.

[0038] In an embodiment of the application, the first unit pool 3 and the second unit pool 4 are both rectangular, which facilitates the assembly of the internal structure.

[0039] The end wall of the second unit pool 4 away from the first unit pool 3 (i.e. the backflow port pool wall) is provided with a backflow port 11, and the setting position of the backflow port 11 is higher than the highest end of the slope 7. The end wall of the first unit pool 3 away from the second unit pool 4 (i.e. the water inlet port pool wall) is provided with a water inlet port 12, and the lowest end of the water inlet port 12 is higher than the water passage of the connecting tunnel of the flow guide wall 2; the water inlet port 12 and the backflow port 11 are correspondingly provided with water inlet gates and backflow gates, and the specific structure of the gates can refer to the prior art, which will not be described herein.

[0040] In an embodiment of the application, the water inlet distribution culvert 10 is arranged on the two side walls of the second unit pool 4 along the length direction of the second unit pool 4, the tunnel is arranged inside, and the water distribution holes 9 are evenly distributed on the distribution surface 13 along the length direction of the water inlet distribution culvert 10. Optionally, the tunnel and the water inlet distribution culvert 10 are made of steel plate material, and the side of the water inlet distribution culvert 10 provided with the distribution surface 13 is realized by a cover plate which can be opened and closed relative to the tunnel, so that the water inlet distribution culvert 10 becomes a semi-closed structure, and the inside of the tunnel can be directly cleaned after the cover plate is opened.

[0041] In an embodiment of the application, the distribution surface 13 is gradually inclined downward from the top of the water inlet distribution culvert 10 along the direction close to the slope 7, and the water distribution holes 9 are evenly arranged on the distribution surface 13. The inclined surface of the distribution surface 13 is arranged to guide the direction of the water flow to achieve flushing, and the transverse interval of the distribution surface 13 on each water distribution hole 9 is consistent, so that the flushing water flow is uniformly discharged.

[0042] In an embodiment of the application, the water inlet distribution culvert 10 is arranged as a right-angled trapezoid, which is more convenient for standardization in the membrane area 6. The inclined surface of the right-angled trapezoid is arranged as the distribution surface 13, and the two side distribution surfaces 13 are oppositely arranged. In an embodiment of the application, the right angle side of the right-angled trapezoid is attached to the pool wall on both sides of the membrane area 6, the horizontal angle between the distribution surface 13 and the horizontal plane is 45 degrees, and the top plane of the right-angled trapezoid is used as the mounting plane of the membrane module.

[0043] In an embodiment of the present application, the water distribution holes 9 on the distribution surface 13 are provided with at least two distribution modes, one of which is that the water distribution holes 9 on the same distribution surface 13 are all located in the same horizontal plane. In actual use, the process water of the previous stage is injected into the water inlet distribution area 5, and the process water in the water inlet distribution area 5 enters the cavity from the water inlet, and each water distribution hole 9 is in the same horizontal plane on the distribution surface 13, and there is only a horizontal position difference between the water distribution holes 9 on the same distribution surface 13, and the two side distribution surfaces 13 are symmetrically arranged, that is, all the water distribution holes 9 are arranged in the same horizontal plane. Under the condition that the two side water inlet distribution culverts 10 are the same structure, the water flow state of the water distribution holes 9 is ensured to be consistent. The water flow distributed uniformly by the water distribution holes 9 on the several distribution surfaces 13 flushes the sludge on the slope 7, so that the sludge is discharged along the slope 7 to the sludge collecting tank 8.

[0044] In addition, there is another setting method that the water distribution holes 9 on the same distribution surface 13 are all located in a inclined plane which is parallel to the surface of the slope 7. There is a horizontal position difference and a vertical position difference between the water distribution holes 9. This difference causes the water distribution holes 9 to be arranged corresponding to the inclination of the slope 7, so that the absolute distance from each water distribution hole 9 to the surface of the slope 7 is equal to realize uniform water distribution.

[0045] It can be predicted that the distribution mode of the water distribution holes 9 on the distribution surface 13 is not limited to the above, and can be adjusted according to the sum of the diameter of each opening and the internal water flow, which will not be expanded here.

[0046] In an embodiment of the present application, the water distribution holes 9 on the two side distribution surfaces 13 are symmetrically arranged. The flow rate of the water distribution holes 9 is set to be at least 2 m / s, and the size and number of the water distribution holes 9 are determined according to the flow rate, which covers the bottom of the membrane area 6 to realize uniform water distribution of the cavity in the membrane area 6.

[0047] In an embodiment of the present application, the opening diameters of all the water distribution holes 9 are consistent, and the opening type of the water distribution holes 9 can be one of a square hole, a rectangular hole, a circular hole, an oval hole, a polygonal hole and an irregular shaped hole. It can be predicted that in other embodiments, the water distribution holes 9 can also be adjusted to be not uniform in opening diameter according to the factors of the distribution position and the water flow, which will not be described here.

[0048] In an embodiment of the present application, the bottom wall elevation of the above-mentioned second unit tank 4 is higher than the bottom wall elevation in the tank of the sludge collecting tank 8. It is ensured that the sludge can be smoothly guided to the sludge collecting tank 8 after the slope 7 is assembled, and the sludge collecting tank 8 is also provided with an opening for discharging the sludge outward.

[0049] In an embodiment of the present application, the bottom wall elevation of the first unit pool 3 is consistent with the bottom wall elevation of the second unit pool 4. The consistent elevation of the first unit pool 3 and the second unit pool 4 can facilitate the standardized configuration of the internal structure.

[0050] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not result in a contradiction, it shall be considered within the scope of the present disclosure.

[0051] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A membrane bioreactor with uniform water distribution and anti-sludge accumulation, comprising a membrane tank body, characterized in that, Also includes: A flow guide wall is installed inside the membrane tank body cavity, which divides the membrane tank body into a first unit tank and a second unit tank. The cavity inside the first unit tank is set as the water inlet and distribution area, and the cavity inside the second unit tank is set as the membrane area. A slope, a sludge collection trough, and a water inlet distribution culvert are provided within the membrane area; The sludge collection trough is located at the bottom of the second unit pool near one end of the first unit pool; The ramp is located at the bottom of the second unit pool, and the ramp gradually slopes downwards along the direction close to the sludge collection trough. The bottom end of the ramp is connected to the opening of the sludge collection trough. The water inlet distribution culverts are symmetrically arranged on both sides of the ramp. Several water distribution holes are opened on the distribution surfaces of the water inlet distribution culverts on both sides. A cavity is provided in the water inlet distribution culverts. The water distribution holes are connected to the water inlet distribution area through the cavity.

2. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, Both the first cell pool and the second cell pool are set to rectangles; The second unit pool has a reflux port on its wall opposite to the first unit pool, and the first unit pool has a water inlet on its wall opposite to the second unit pool.

3. The membrane bioreactor tank with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, The water inlet distribution culvert is fitted onto the two side walls of the second unit pool along the length of the second unit pool; the water distribution holes are evenly distributed on the distribution surface along the length of the water inlet distribution culvert.

4. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 3, characterized in that, The distribution surface gradually slopes downward from the top of the water inlet distribution culvert along the direction close to the slope, and the water distribution holes are evenly distributed on the distribution surface.

5. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 3, characterized in that, The water inlet distribution culvert is configured as a right-angled trapezoid, and the inclined surface of the right-angled trapezoid is configured as the distribution surface, with the two distribution surfaces on both sides being arranged opposite to each other.

6. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, All the water distribution holes located on the same distribution surface are located in the same horizontal plane. Alternatively, the water distribution holes located on the same distribution surface are all located in an inclined plane, which is parallel to the surface of the slope.

7. The membrane bioreactor tank with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, The water distribution holes located on the two sides of the distribution surface are symmetrically arranged.

8. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, All the water distribution holes have the same opening diameter.

9. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, The bottom wall elevation of the second unit pool is higher than the bottom wall elevation of the sludge collection trough.

10. The membrane bioreactor with uniform water distribution and anti-sludge accumulation as described in claim 1, characterized in that, The bottom wall elevation of the first unit pool is the same as that of the second unit pool.

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