Accurate pulse aeration device of MBR (Membrane Bioreactor) membrane tank

Abstract

The utility model discloses an accurate pulse aeration device of an MBR membrane tank, which relates to the technical field of sewage treatment, and comprises a plurality of MBR membrane components distributed in the membrane tank, the water outlet end of the top of each MBR membrane component is connected with a water outlet pipe, the bottom of each MBR membrane component is provided with an aeration component, one side of each aeration component is connected to an aeration header pipe through an aeration branch pipe, and the other side of each aeration component is connected to an aeration header pipe through an aeration branch pipe. Each aeration branch pipe is provided with a flow meter and an electromagnetic valve which are used for realizing precise pulse aeration, the electromagnetic valve is connected with the flow meter through a controller, and a detection terminal of the dissolved oxygen analyzer is positioned in the membrane tank. According to the utility model, the accurate aeration of each MBR membrane component can be realized, the options of the fan are reduced, the energy consumption is reduced, the output of the air volume of the fan can be controlled and reduced by combining the accurate pulse aeration of the dissolved oxygen analyzer and the MBR membrane component, and the dissolved oxygen of the MBR membrane pool is reduced, so that the content of the dissolved oxygen in denitrification reflux liquid is reduced, and the denitrification efficiency is improved. And normal denitrification of the anoxic tank is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and specifically relates to a precise pulse aeration device for an MBR membrane pool. Background Art

[0002] MBR membrane bioreactor uses membrane separation technology to separate solid and liquid from sewage. Due to the advantages of stable effluent quality, small footprint, and convenient operation, MBR membrane bioreactor is widely used in the field of sewage treatment. In actual operation, the membrane filaments used in MBR membrane bioreactor are easily blocked when effluent, and continuous aeration is required to flush the membrane surface. With this continuous aeration method, on the one hand, continuous aeration has high requirements for fans and brings high energy consumption. At the same time, aeration does not flush the membrane surface thoroughly, and the membrane filaments are easy to clog. On the other hand, continuous aeration will also cause an increase in dissolved oxygen in the MBR membrane pool, which will lead to an increase in the dissolved oxygen content in the denitrification reflux liquid. In order to solve the above problems, we designed and proposed a precise pulse aeration device for MBR membrane pool. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art that continuous aeration of MBR membrane bioreactor leads to high energy consumption, incomplete aeration of the membrane surface, easy clogging of membrane fibers, and increased dissolved oxygen content, and proposes a precise pulse aeration device for MBR membrane pool. The precise pulse aeration device for MBR membrane pool can achieve precise aeration of each MBR membrane component, reduce the options of fans, reduce energy consumption, and effectively reduce the risk of membrane fiber clogging. In addition, the dissolved oxygen in the MBR membrane pool can be reduced, thereby reducing the dissolved oxygen content in the denitrification reflux liquid, and the denitrification of the anoxic pool can be carried out normally.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A precise pulse aeration device for an MBR membrane pool is designed, comprising a plurality of MBR membrane assemblies, wherein the plurality of MBR membrane assemblies are distributed in the membrane pool, the water outlet end at the top of the MBR membrane assembly is connected to the water outlet pipe, an aeration assembly is provided at the bottom of each of the MBR membrane assemblies, one side of the aeration assembly is connected to the aeration main pipe through an aeration branch pipe, each of the aeration branch pipes is provided with a flow meter and an electromagnetic valve for achieving precise pulse aeration, the electromagnetic valve is connected to the flow meter through a controller, and further comprising a dissolved oxygen analyzer, the dissolved oxygen analyzer is fixedly arranged on the membrane pool and connected to the controller, and the detection terminal of the dissolved oxygen analyzer is located in the membrane pool.

[0006] Furthermore, the plurality of MBR membrane modules perform step-by-step intermittent pulse aeration under the control of the controller.

[0007] Furthermore, the aeration assembly includes a pulse aeration bin and an aeration orifice plate, the aeration branch pipe is connected to one side of the pulse aeration bin, the aeration orifice plate is located at the top of the pulse aeration bin, one end of the MBR membrane wire is fixed on the aeration orifice plate and is staggered with the aeration holes of the aeration orifice plate.

[0008] Furthermore, the aeration hole plate is a movable component, ears are arranged on both sides of the aeration hole plate, movable supporting mechanisms are arranged on the ears, and the side wall of the pulse aeration bin is an elastic structure that supports the aeration hole plate to move.

[0009] Furthermore, the side wall of the pulse aeration bin is a corrugated sleeve made of rubber.

[0010] Furthermore, the movable supporting mechanism comprises an optical axis, the optical axis is arranged through the support ear, and a return spring is sleeved on the optical axis and located above the support ear.

[0011] Compared with the prior art, the utility model proposes a precise pulse aeration device for an MBR membrane pool, which has the following beneficial effects: the utility model can realize precise pulse aeration of each MBR membrane component, while improving the removal of attachments on the surface of membrane fibers, reducing the risk of clogging of membrane fibers, reducing the options of fans, and reducing energy consumption. The precise pulse aeration of the dissolved oxygen analyzer combined with the MBR membrane component can control the output of the fan to reduce the air volume, which is used to reduce the dissolved oxygen in the MBR membrane pool, thereby reducing the dissolved oxygen content in the denitrification reflux liquid and implementing the normal denitrification of the anoxic pool. Specifically:

[0012] (1) The utility model can realize accurate pulse aeration of multiple MBR membrane modules by setting a controller, a flow meter and an electromagnetic valve connected to the controller. The instantaneous impact generated by the pulse aeration can remove sludge and other debris attached to the MBR membrane modules to prevent the membrane fibers from being blocked.

[0013] (2) The utility model can reduce the options of fans and reduce energy consumption through pulse aeration of MBR membrane components, and can realize step-by-step intermittent pulse aeration of multiple MBR membrane components through a controller, and pulse aeration of each MBR membrane component separately, which can further reduce the options of fans and reduce energy consumption.

[0014] (3) The utility model detects the dissolved oxygen content in the membrane pool through a dissolved oxygen analyzer to control the aeration volume of each pulse aeration group, reduce the output of the fan air volume, reduce the dissolved oxygen in the MBR membrane pool, and thus reduce the dissolved oxygen content in the denitrification return liquid, so as to ensure the normal denitrification of the anoxic pool.

[0015] (4) The utility model can be provided with a movable aeration hole plate. When pulse aeration is performed, the aeration hole plate will vibrate up and down under the impact of aeration. While vibrating, the upper MBR membrane wires are driven to shake. The MBR membrane wires collide and rub against each other during the shaking process, causing sludge and other debris attached to the surface to fall off, thereby playing a certain dredging role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the MBR membrane assembly of the utility model in Example 1;

[0019] Figure 3 It is a schematic diagram of the structure of the MBR membrane assembly of the utility model in Example 2;

[0020] The markings in the figure are: 1. MBR membrane assembly; 11. Aeration assembly; 110. Pulse aeration chamber; 111. Aeration orifice plate; 112. Corrugated sleeve; 113. Support ear; 114. Optical axis; 115. Reset spring; 12. Water outlet; 13. MBR membrane wire; 2. Water outlet pipe; 3. Aeration main pipe; 31. Aeration branch pipe; 4. Flow meter; 5. Solenoid valve; 6. Dissolved oxygen analyzer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like 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 cannot be understood as a limitation on the present invention.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] The structural features of the present utility model are now described in detail with reference to the accompanying drawings of the specification.

[0025] Example 1

[0026] See also Figure 1-Figure 2 A precise pulse aeration device for an MBR membrane pool comprises a plurality of MBR membrane modules 1, wherein the plurality of MBR membrane modules 1 are distributed in the membrane pool, wherein a water outlet end 12 at the top of the MBR membrane module 1 is connected to a water outlet pipe 2, and an aeration module 11 is provided at the bottom of each MBR membrane module 1, wherein the MBR membrane module 1, the water outlet end 12 and the aeration module 11 are fixed on a membrane frame, wherein the aeration module 11 comprises a pulse aeration bin 110 and an aeration orifice plate 111, an aeration branch pipe 31 is connected to one side of the aeration bin 110, the aeration orifice plate 111 is located at the top of the pulse aeration bin 110, one end of an MBR membrane filament 13 is fixed to the aeration orifice plate 111, and the aeration holes of the aeration orifice plate 111 are staggered, and the aeration module 11 can perform pulse aeration on the MBR membrane filament 13.

[0027] One side of the aeration component 11 is connected to the aeration main pipe 3 through an aeration branch pipe 31. Each aeration branch pipe 31 is provided with a flow meter 4 and an electromagnetic valve 5 for realizing precise pulse aeration. The electromagnetic valve 5 is connected to the flow meter 4 through a controller. The flow meter 4 can monitor the aeration flow on each aeration branch pipe 31, and the electromagnetic valve 5 realizes precise pulse aeration for each MBR membrane component 1 according to the detected flow. It also includes a dissolved oxygen analyzer 6, which is fixedly arranged on the membrane pool and connected to the controller. The detection terminal of the dissolved oxygen analyzer 6 is located in the membrane pool. The dissolved oxygen analyzer 6 is combined with the precise pulse aeration of the MBR membrane component 1 to control the output of the fan air volume to reduce the dissolved oxygen in the MBR membrane pool, thereby reducing the dissolved oxygen content in the denitrification reflux liquid, and realizing the normal denitrification of the anoxic tank. The aeration component 11 adopts pulse aeration to aerate the MBR membrane component 1, wherein the controller is a programmable PLC, which can set the aeration volume of the precise aeration and the frequency of the pulse aeration, and the frequency of the pulse can be set according to the actual operation. The pulse aeration of the MBR membrane assembly can reduce the options of the fan, reduce the power of the fan and the running time, thereby reducing energy consumption. In order to further reduce the energy consumption of the fan, multiple MBR membrane assemblies 1 can adopt step-by-step intermittent pulse aeration under the control of the controller, and pulse aeration of each MBR membrane assembly 1 can be performed separately, which can further reduce the options of the fan and reduce energy consumption.

[0028] The precise pulse aeration device for the MBR membrane pool of the utility model has a simple structure. On the one hand, it can realize precise aeration of each MBR membrane component 1, reduce the options of the fan, and reduce energy consumption. On the other hand, it can effectively reduce the dissolved oxygen in the MBR membrane pool during use, thereby reducing the dissolved oxygen content in the denitrification reflux liquid and ensuring the normal denitrification of the anoxic pool.

[0029] Specifically, when in use, through the controller, the flow meter 4, the electromagnetic valve 5 and the dissolved oxygen analyzer 6 connected to the controller can realize precise pulse aeration of multiple MBR membrane components 1. Each group of MBR membrane components 1 is pulse-aerated by the aeration component 11 at the bottom, thereby reducing the aeration demand, reducing the fan options and reducing energy consumption. By controlling each group of pulse aeration, the dissolved oxygen in the MBR membrane pool can be reduced, thereby reducing the dissolved oxygen content in the denitrification reflux liquid.

[0030] Example 2

[0031] Reference Figure 3As another preferred embodiment of the utility model, the difference from Embodiment 1 is that the aeration hole plate 111 is a movable component, ears 113 are arranged on both sides of the aeration hole plate 111, and a movable supporting mechanism is arranged on the ears 113. The movable supporting mechanism includes an optical axis 114, and the optical axis 114 is arranged on the ears 113 through and through. A return spring 115 is sleeved on the optical axis 114 and above the ears 113. The side wall of the pulse aeration bin 110 is an elastic structure that supports the aeration hole plate 111 for movement, wherein the side wall of the pulse aeration bin 110 is a corrugated sleeve 112 made of rubber. By setting a movable aeration hole plate 111, when pulse aeration is performed, the aeration hole plate 111 will move upward under the impact of aeration, and will move downward under the action of the return spring 115 after the aeration stops. Repeated pulse aeration will cause the aeration hole plate 111 to vibrate up and down, and at the same time, drive the upper MBR membrane filaments 13 to shake. The MBR membrane filaments 13 collide and rub against each other during the shaking process, so that sludge and other debris attached to the surface fall off, which plays a certain dredging role and reduces the blockage of the MBR membrane assembly 1.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A precise pulse aeration device for an MBR membrane pool, comprising a plurality of MBR membrane modules (1), wherein the plurality of MBR membrane modules (1) are distributed in the membrane pool, and the water outlet end (12) at the top of the MBR membrane module (1) is connected to a water outlet pipe (2), characterized in that: An aeration assembly (11) is provided at the bottom of each of the MBR membrane assemblies (1); One side of the aeration assembly (11) is connected to the aeration main pipe (3) via an aeration branch pipe (31), and each of the aeration branch pipes (31) is provided with a flow meter (4) and an electromagnetic valve (5) for achieving precise pulse aeration, and the electromagnetic valve (5) is connected to the flow meter (4) via a controller; It also comprises a dissolved oxygen analyzer (6), which is fixedly arranged on the membrane pool and connected to the controller, and the detection terminal of the dissolved oxygen analyzer (6) is located in the membrane pool.

2. A precise pulse aeration device for an MBR membrane pool according to claim 1, characterized in that: The multiple MBR membrane modules (1) perform step-by-step intermittent pulse aeration under the control of a controller.

3. The precise pulse aeration device for an MBR membrane pool according to claim 1, characterized in that: The aeration assembly (11) comprises a pulse aeration chamber (110) and an aeration orifice plate (111), the aeration branch pipe (31) is connected to one side of the pulse aeration chamber (110), the aeration orifice plate (111) is located at the top of the pulse aeration chamber (110), and one end of the MBR membrane wire (13) is fixed on the aeration orifice plate (111) and is arranged in an alternating manner with the aeration holes of the aeration orifice plate (111).

4. A precise pulse aeration device for an MBR membrane pool according to claim 3, characterized in that: The aeration hole plate (111) is a movable component. Support ears (113) are arranged on both sides of the aeration hole plate (111). A movable supporting mechanism is arranged on the support ears (113). The side wall of the pulse aeration chamber (110) is an elastic structure that supports the aeration hole plate (111) to move.

5. A precise pulse aeration device for an MBR membrane pool according to claim 4, characterized in that: The side wall of the pulse aeration chamber (110) is a corrugated sleeve (112) made of rubber.

6. A precise pulse aeration device for an MBR membrane pool according to claim 4, characterized in that: The movable support mechanism comprises an optical axis (114), the optical axis (114) is arranged through the support ear (113), and a return spring (115) is sleeved on the optical axis (114) and located above the support ear (113).

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