Integrated MBR membrane tank wastewater treatment unit

Abstract

This invention provides an integrated MBR membrane tank wastewater treatment device that solves the problem of membrane tank concentration control. It includes a membrane tank with an inlet at the top and a outlet at the bottom. An opening and closing assembly is installed at the outlet, and sludge guiding assemblies are located above and below the outlet. An isolation assembly is installed inside the membrane tank. This invention has advantages such as good sludge concentration control and stable operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of membrane tank equipment, specifically relating to an integrated MBR membrane tank wastewater treatment device. Background Technology

[0002] Membrane separation technology has become a research hotspot due to its high efficiency. Existing membrane bioreactors are widely used to treat wastewater. However, in actual use, conventional sedimentation methods cannot control sludge concentration in real time, affecting membrane separation efficiency. Frequent aeration is required to maintain the membrane material's retention effect. In addition, existing MBR membrane tanks cannot maintain a stable sludge concentration when discharging sludge. During the discharge process, it has a significant impact on membrane filtration, resulting in not only large energy losses but also making it difficult to control the sludge in the process system.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a sludge cleaning device for MBR membrane tanks [202311771172.4], which includes a sludge tank and a sludge outlet fixedly installed on the top of the sludge tank. A sludge discharge mechanism is provided on the sludge tank for thoroughly cleaning the sludge. The sludge discharge mechanism includes a receiving frame slidably disposed on the inner side of the bottom of the sludge tank and a limiting shell fixedly disposed on the sludge tank. A lifting component is provided on the sludge tank for driving the receiving frame to move upward. A sludge scraping component is provided on the limiting shell for scraping the sludge on the receiving frame. The sludge discharge mechanism also includes a linkage component disposed at the bottom of the limiting shell.

[0004] The above-mentioned solution has solved the problem of existing sludge discharge to a certain extent, but it still has many shortcomings, such as the inability to guarantee the control of sludge concentration. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a reasonably designed membrane tank sludge concentration control device that effectively controls sludge concentration.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated MBR membrane tank wastewater treatment device, comprising a membrane tank, an inlet provided at the top of the membrane tank, a discharge outlet provided at the bottom of the membrane tank, an opening and closing component installed at the discharge outlet, sludge guiding components provided at the upper and lower ends of the discharge outlet, and a partition component provided inside the membrane tank.

[0007] In the aforementioned integrated MBR membrane tank wastewater treatment device, the membrane tank adopts a vertical closed structure, with an overflow port installed at the top of the membrane tank. The membrane tank is equipped with several membrane modules that are equidistantly arranged and extend vertically through a lifting assembly. The membrane modules are hollow fiber membrane tubes connected in parallel.

[0008] In the aforementioned integrated MBR membrane tank wastewater treatment device, an aeration pulse box is installed inside the membrane tank, and the aeration pulse box is connected to an aeration pipe located below the membrane module.

[0009] In the aforementioned integrated MBR membrane tank wastewater treatment device, the lifting assembly includes a lifting frame fixedly connected to the lifting frame, the lifting frame being slidably connected to the membrane tank and having a lifting rack on its inner side, and a lifting gear being installed at the upper end of the membrane tank that meshes with the lifting rack for transmission, the lifting gear being connected to the lifting motor via a speed-changing gear set.

[0010] In the aforementioned integrated MBR membrane tank wastewater treatment device, the bottom of the membrane tank is sloping and the sludge outlet is located at the lower end of the membrane tank. The sludge outlet is elongated and there is an outlet channel opposite to the sludge outlet below the membrane tank.

[0011] In the aforementioned integrated MBR membrane tank wastewater treatment device, the opening and closing assembly includes a pair of opening and closing connecting rods arranged in parallel on both sides of the sewage outlet. The opening and closing connecting rods are respectively connected to opening and closing flaps that can be closed and locked. The two ends of the opening and closing connecting rods are connected to the opening and closing motor through a synchronous gear set.

[0012] In the aforementioned integrated MBR membrane tank wastewater treatment device, the sludge guiding component includes a pair of rotating guide shafts. The two ends of the guide shafts are connected to the guide motor via a synchronous gear set, and the guide shafts are equipped with meshing guide screws.

[0013] In the aforementioned integrated MBR membrane tank wastewater treatment device, the partition assembly includes partition mesh panels arranged at equal intervals inside the membrane tank, and the partition mesh panels are connected to the pneumatic push rod via a synchronous connecting rod.

[0014] In the aforementioned integrated MBR membrane tank wastewater treatment device, a sliding cover is provided at the upper opening of the membrane tank.

[0015] In the aforementioned integrated MBR membrane tank wastewater treatment device, the membrane tank has built-in sensing elements.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the membrane module is equipped with a lifting component and an aeration structure, reducing its daily maintenance costs; the opening and closing component precisely controls the opening and closing of the sewage outlet, thereby achieving intermittent or quantitative sludge discharge, and the double sealing ensures the sealing effect; the internal inclined plate divides the membrane tank into a sludge zone and a sewage zone, and the sewage zone is equipped with an aeration device to provide intermittent aeration to clean the membrane module in the sewage zone. At the same time, due to the function of the inclined plate component, the aeration device does not affect the sludge zone, thereby stabilizing the sludge concentration in the sludge zone. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a structural cross-sectional view of the present invention; Figure 4 This is another structural schematic diagram of the present invention; In the diagram, the components are: membrane tank 1, inlet 11, outlet 12, overflow outlet 13, sliding cover 14, opening and closing assembly 2, opening and closing linkage 21, opening and closing flap 22, opening and closing motor 23, sludge guiding assembly 3, guide shaft 31, guide motor 32, guide screw 33, partition assembly 4, partition mesh 41, synchronous linkage 42, pneumatic push rod 43, lifting assembly 5, lifting frame 51, lifting rack 52, lifting gear 53, lifting motor 54, membrane module 6, aeration pulse box 61, and aeration pipe 62. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 As shown, the integrated MBR membrane wastewater treatment device includes a membrane tank 1. An inlet 11 is located at the top of the membrane tank 1, and a drain outlet 12 is located at the bottom. An opening / closing component 2 is installed at the drain outlet 12, and sludge guiding components 3 are installed at the upper and lower ends of the drain outlet 12. A partition component 4 is installed inside the membrane tank 1. After wastewater enters the membrane tank 1 through the inlet 11, it undergoes initial solid-liquid separation under gravity. The partition component 4 divides the flow area, slows down the water flow velocity, and promotes sludge flocculation and sedimentation, thereby optimizing the separation effect. The supernatant after sedimentation undergoes deep filtration through the membrane component 6, while the concentrated sludge accumulates at the bottom of the tank and is finally discharged through the controllable drain outlet 12. This dynamically maintains the optimal sludge concentration in the tank, ensuring membrane filtration efficiency and preventing membrane fouling.

[0020] Specifically, the membrane tank 1 adopts a vertical closed structure, and an overflow port 13 is installed on the top of the membrane tank 1. Several membrane modules 6 are installed in the membrane tank 1 through the lifting component 5, which are arranged at equal intervals and extend in the vertical direction. The membrane modules 6 are hollow fiber membrane tubes connected in parallel.

[0021] Specifically, an aeration pulse box 61 is installed inside the membrane tank 1, and the aeration pulse box 61 is connected to an aeration pipe 62 located below the membrane module 6.

[0022] Furthermore, unlike existing fixed membrane structures, the lifting frame 51 is slidably connected to the membrane tank 1 and has a lifting rack 52 on its inner side. A lifting gear 53, meshing with the lifting rack 52, is installed at the upper end of the membrane tank 1. The lifting gear 53 is connected to the lifting motor 54 via a gear set. The lifting motor 54 transmits power to the lifting gear 53 through the gear set. The meshing of the gear and rack precisely converts the rotational motion of the motor into the linear motion of the lifting frame 51, thereby driving the entire membrane assembly 6 to rise and fall smoothly. Simultaneously, the lifting motor 54 can self-lock when it stops.

[0023] Furthermore, the bottom of the membrane tank 1 is sloped, and the sludge outlet 12 is located at the lower end of the membrane tank 1. Gravity naturally guides the settling sludge to slide towards the sludge outlet 12, which is located at the lowest point, reducing the risk of sludge retention and caking at the bottom of the membrane tank 1. The sludge outlet 12 is elongated, increasing the discharge area and facilitating the rapid and uniform discharge of bottom sludge. Below the membrane tank 1, there is a discharge channel opposite the sludge outlet 12, used to smoothly guide the discharged sludge to subsequent treatment units.

[0024] In addition, the opening and closing assembly 2 includes a pair of opening and closing connecting rods 21 arranged in parallel on both sides of the sewage outlet 12. The opening and closing connecting rods 21 are respectively connected to the opening and closing flaps 22 that can be closed and locked. The two ends of the opening and closing connecting rods 21 are connected to the opening and closing motor 23 through a synchronous gear set. The opening and closing motor 23 drives the two opening and closing connecting rods 21 to rotate synchronously in opposite directions through the synchronous gear set, thereby driving the two opening and closing flaps 22 to realize the precise opening and sealing of the sewage outlet, and realize the on-demand and quantitative sludge discharge.

[0025] Meanwhile, the sludge guiding component 3 extrudes the sludge, including a pair of rotating guide shafts 31. The two ends of the guide shafts 31 are connected to the guide motor 32 through a synchronous gear set. The guide shafts 31 are provided with mutually meshing guide screws 33. The guide motor 32 drives the guide shafts 31 to rotate synchronously. The mutually meshing screws 33 on the shaft form a structure similar to a screw conveyor. When rotating, it generates directional thrust, which can actively agitate the deposited sludge near the discharge port and push it toward the discharge port.

[0026] As can be seen, the partition assembly 4 includes partition mesh panels 41 arranged at equal intervals inside the membrane tank 1. The partition mesh panels 41 are connected to the pneumatic push rod 43 via a synchronous connecting rod 42. The partition mesh panels 41 rotate synchronously to partition the interior of the membrane tank 1, thereby disrupting the inertia of the water flow and reducing the interference of bottom sludge discharge on the upper membrane assembly 6.

[0027] It is obvious that the upper opening of the membrane pool 1 is equipped with a sliding cover 14 for partial sealing, which can be slid open during routine maintenance and repair.

[0028] Preferably, the membrane tank 1 has built-in sensing elements, including but not limited to sludge concentration meters, level gauges, pressure sensors, etc., which are linked with drive components such as guide motor 32 and opening / closing motor 23 through a PLC unit to achieve sludge concentration feedback control.

[0029] In summary, the principle of this embodiment is as follows: through the synergistic action of the membrane tank 1 and the partition mesh 41, the water flow velocity is effectively reduced and the gravity settling and flocculation of sludge flocs are promoted, thereby completing the initial solid-liquid separation; subsequently, deep filtration is performed using the relative membrane module 6, and the lifting component 5 driven by the lifting motor 54, lifting gear 53 and rack 52 can lift the membrane module 6 at any time; for the concentrated sludge settling at the bottom of the slope, the opening and closing of the discharge port is realized by the opening and closing component 2 of the opening and closing flap 22 precisely controlled by the opening and closing motor 23, and the sludge guiding component 3 driven by the guiding motor 32 and equipped with mutually meshing guiding screws 33 actively stirs the sludge and pushes it towards the long strip discharge port 12 to ensure complete discharge.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as membrane tank 1, inlet 11, outlet 12, overflow 13, sliding cover 14, opening / closing assembly 2, opening / closing linkage 21, opening / closing flap 22, opening / closing motor 23, sludge guiding assembly 3, guide shaft 31, guide motor 32, guide screw 33, partition assembly 4, partition mesh 41, synchronous linkage 42, pneumatic push rod 43, lifting assembly 5, lifting frame 51, lifting rack 52, lifting gear 53, lifting motor 54, membrane assembly 6, aeration pulse box 61, and aeration pipe 62, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An integrated MBR membrane tank wastewater treatment device, comprising a membrane tank (1), wherein an inlet (11) is provided at the top of the membrane tank (1) and a drain outlet (12) is provided at the bottom of the membrane tank (1), characterized in that, An opening and closing component (2) is installed at the sewage outlet (12), and sludge guiding components (3) are respectively provided at the upper and lower ends of the sewage outlet (12). A partition component (4) is provided inside the membrane tank (1). The membrane tank (1) adopts a vertical closed structure. An overflow port (13) is installed at the top of the membrane tank (1). Several membrane components (6) are installed in the membrane tank (1) through a lifting component (5) and are arranged at equal intervals and extending in the vertical direction. The membrane components (6) are hollow fiber membrane tubes connected in parallel. An aeration pulse box (61) is installed inside the membrane tank (1). The aeration pulse box (61) is connected to an aeration pipe (62) located below the membrane component (6). The lifting component (5) includes a lifting frame (51). The lifting frame (51) is slidably connected to the membrane tank (1) and a lifting rack (52) is provided on the inner side. A lifting rack (52) is installed at the upper end of the membrane tank (1). The lifting gear (53) meshes with the strip (52), and the lifting gear (53) is connected to the lifting motor (54) through a speed-changing gear set; the bottom of the membrane tank (1) is inclined and the sewage outlet (12) is located at the lower end of the membrane tank (1). The sewage outlet (12) is long and narrow. The membrane tank (1) has an outlet channel opposite to the sewage outlet (12) at the bottom; the opening and closing assembly (2) includes a pair of opening and closing connecting rods (21) arranged in parallel on both sides of the sewage outlet (12). The opening and closing connecting rods (21) are respectively connected to the opening and closing flaps (22) that can be closed and locked. The two ends of the opening and closing connecting rods (21) are connected to the opening and closing motor (23) through a synchronous gear set; the partition assembly (4) includes partition mesh plates (41) arranged at equal intervals inside the membrane tank (1). The partition mesh plates (41) are connected to the pneumatic push rod (43) through a synchronous connecting rod (42).

2. The integrated MBR membrane tank wastewater treatment device according to claim 1, characterized in that, The sludge guiding assembly (3) includes a pair of rotating guide shafts (31), both ends of which are connected to the guide motor (32) via a synchronous gear set, and guide screws (33) meshing with each other are provided on the guide shafts (31).

3. The integrated MBR membrane tank wastewater treatment device according to claim 1, characterized in that, The membrane tank (1) has a sliding cover (14) at the upper opening.

4. The integrated MBR membrane tank wastewater treatment device according to claim 1, characterized in that, The membrane pool (1) has a built-in sensing element.

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