Device for reducing concentration of suspended solids in mixed liquor in MBR (Membrane Bioreactor) system

Abstract

The utility model discloses a device for reducing the suspended solid concentration of mixed liquor in an MBR (Membrane Biological Reactor) system, which comprises a membrane tank, a degassing tank, an anoxic tank and an aerobic tank which are fixedly connected in sequence, the aerobic tank is arranged on one side of the membrane tank, a middle tank is fixedly connected to one side of the aerobic tank facing the membrane tank, a water inlet hole communicated with the aerobic tank is formed in the bottom of one side of the middle tank, and a water outlet hole communicated with the anoxic tank is formed in the bottom of one side of the middle tank. The inclined plates are fixedly mounted in the middle of the inner cavity of the middle tank in an inclined state, an inclined upward water flow channel is formed between every two adjacent inclined plates, and the concentration reducing assembly is mounted in the water flow channels. According to the utility model, the middle tank, the inclined plates, the concentration reducing assembly and the membrane tank are matched for use, the inclined plates form the water flow channel which is inclined upwards in the middle tank, and when water flows through the water flow channel which is inclined upwards, a large amount of suspended solids can be settled, so that the concentration of the suspended solids entering the membrane tank is reduced; and the concentration of resistance solids of suspended particles in the membrane tank entering the water flow is reduced.

Description

Technical Field

[0001] The utility model relates to the field of MBR systems, and particularly relates to a device for reducing the concentration of mixed liquor suspended solids in an MBR system. Background Technique

[0002] The membrane bioreactor (MBR) is a water treatment technology that combines membrane separation technology with biological treatment technology. It replaces the secondary sedimentation tank in the traditional activated sludge method through the separation function of the membrane, realizes solid-liquid separation, thereby improving the effluent quality and the treatment efficiency of the system. The MBR process can maintain a high sludge concentration, extend the residence time of microorganisms, enhance the shock load resistance of the system, and reduce the production of excess sludge.

[0003] When treating sewage, usually after sewage filtration, through the treatment of the degassing tank, anoxic tank and aerobic tank, the water flow is directly sent to the membrane tank for treatment through the conveying pipeline. However, the concentration of mixed liquor suspended solids is as high as 30 - 40 g / L. Due to the high sludge concentration, the membrane flux decreases, affecting the overall treatment effect and reducing the sewage treatment efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for reducing the concentration of mixed liquor suspended solids in an MBR system to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for reducing the concentration of mixed liquor suspended solids in an MBR system, including a membrane tank, including:

[0006] A degassing tank, anoxic tank and aerobic tank, the degassing tank, anoxic tank and aerobic tank are fixedly connected in sequence, and the aerobic tank is arranged on one side of the membrane tank;

[0007] An intermediate tank, the intermediate tank is fixedly connected to the side of the aerobic tank facing the membrane tank, and a water inlet hole communicating with the aerobic tank is opened at the bottom of one side of the intermediate tank;

[0008] Inclined plates and a concentration reduction component, the inclined plates are fixedly installed in the middle of the inner cavity of the intermediate tank in an inclined state, and an inclined upward water flow channel is formed between adjacent inclined plates, and the concentration reduction component is installed inside the water flow channel.

[0009] Preferably, a second water outlet hole is opened at the top of one side of the intermediate tank, a water flow pipeline is installed between the second water outlet hole and the membrane tank, a water outlet pipe is installed on one side of the membrane tank, and a water outlet pump is arranged on the water outlet pipe.

[0010] Preferably, a water inlet pipe is arranged at the top of the degassing tank, a first reflux component is arranged between the intermediate tank and the degassing tank, and a second reflux component is arranged between the membrane tank and the aerobic tank.

[0011] Preferably, the first reflux assembly includes:

[0012] An internal reflux pipe installed between the intermediate tank and the degassing tank, and a first water outlet hole matching the internal reflux pipe is provided at the bottom of one side of the intermediate tank;

[0013] An internal reflux pump installed on the internal reflux pipe.

[0014] Preferably, the second reflux assembly includes:

[0015] A sludge reflux pipe and a dust suction hood. The sludge reflux pipe is installed between the membrane tank and the aerobic tank, the dust suction hood is installed at the end of the sludge reflux pipe, and the dust suction hood is located at the bottom of the inner cavity of the membrane tank;

[0016] A sludge reflux pump installed on the sludge reflux pipe.

[0017] Preferably, the concentration reduction assembly includes:

[0018] An installation frame and an adsorption mesh plate. The adsorption mesh plate is installed inside the installation frame, and the installation frame is slidably sleeved inside the water flow channel;

[0019] A positioning block, one side of which is fixedly connected to the inclined plate, and the top of which is in contact with the installation frame.

[0020] Preferably, a fixed support is fixedly connected to the top of the installation frame, a positioning rod is fixedly connected to the top of the fixed support, a positioning collar is slidably sleeved on the top of the outer wall of the positioning rod, and the top of the positioning collar is fixedly connected to the top of the inner wall of the intermediate tank.

[0021] The technical effects and advantages of the present utility model:

[0022] The present utility model utilizes the cooperation of the intermediate tank, the inclined plate, the concentration reduction assembly and the membrane tank. A plurality of inclined plates form an inclined upward water flow channel in the intermediate tank. When the water flow passes through the inclined upward water flow channel, a large amount of suspended solids can settle down, thereby reducing the concentration of suspended solids entering the membrane tank and reducing the resistance of suspended particles in the water flow entering the membrane tank. Brief Description of the Drawings

[0023] Figure 1 It is a front structure schematic diagram of the present utility model.

[0024] Figure 2 It is a front internal structure schematic diagram of the intermediate tank of the present utility model.

[0025] In the figure: 1. Degassing tank; 2. Anoxic tank; 3. Aerobic tank; 4. Intermediate tank; 41. Inlet hole; 42. First outlet hole; 43. Second outlet hole; 44. Internal reflux pipe; 45. Internal reflux pump; 5. Membrane tank; 51. Outlet pipe; 52. Outlet water pump; 53. Sludge reflux pipe; 54. Sludge reflux pump; 6. Inclined plate; 7. Concentration reduction component; 71. Installation frame; 72. Adsorption mesh plate; 73. Positioning block; 74. Fixed support; 75. Positioning rod; 76. Positioning collar. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides a device for reducing the concentration of mixed liquor suspended solids in an MBR system as shown in Figure 1-2 Figure 10, which includes a membrane tank 5, a degassing tank 1, an anoxic tank 2, an aerobic tank 3, an intermediate tank 4, an inclined plate 6, and a concentration reduction component 7. The degassing tank 1, the anoxic tank 2, and the aerobic tank 3 are fixedly connected in sequence. The aerobic tank 3 is arranged on one side of the membrane tank 5. The degassing tank 1, the anoxic tank 2, and the aerobic tank 3 can respectively perform degassing, anoxic, and oxygenation treatments on the treated sewage, and then perform secondary treatment on the sewage. The intermediate tank 4 is fixedly connected to the side of the aerobic tank 3 facing the membrane tank 5. An inlet hole 41 communicating with the aerobic tank 3 is opened at the bottom of one side of the intermediate tank 4. A second outlet hole 43 is opened at the top of one side of the intermediate tank 4. A water flow pipeline is installed between the second outlet hole 43 and the membrane tank 5. An outlet pipe 51 is installed on one side of the membrane tank 5, and an outlet water pump 52 is arranged on the outlet pipe 51. The outlet water pump 52 can pump out the water flow filtered by the membrane inside the membrane tank 5 through the outlet pipe 51. The inclined plate 6 is fixedly installed in the middle of the inner cavity of the intermediate tank 4 in an inclined state. An inclined upward water flow channel is formed between adjacent inclined plates 6. The inclined plate 6 can increase the resistance of the particles in the water flow, thereby reducing the passing rate of the particles in the water flow, and thus reducing the content of the water flow particles entering the membrane tank 5. The concentration reduction component 7 is installed inside the water flow channel.

[0028] In particular, a water inlet pipe is provided at the top of the degassing tank 1. A first reflux assembly is provided between the intermediate tank 4 and the degassing tank 1, and a second reflux assembly is provided between the membrane tank 5 and the aerobic tank 3. The first reflux assembly includes an internal reflux pipe 44 and an internal reflux pump 45. The internal reflux pipe 44 is installed between the intermediate tank 4 and the degassing tank 1. A first water outlet hole 42 matching the internal reflux pipe 44 is opened at the bottom of one side of the intermediate tank 4. The internal reflux pump 45 is installed on the internal reflux pipe 44. When the water flow from the aerobic tank 3 enters the intermediate tank 4 and the particle content is greater than the specified value, the internal reflux pump 45 transports the water flow at the bottom of the inner cavity of the intermediate tank 4 to the degassing tank 1 for reprocessing through the internal reflux pipe 44. The second reflux assembly includes a sludge reflux pipe 53, a sludge reflux pump 54 and a dust suction hood. The sludge reflux pipe 53 is installed between the membrane tank 5 and the aerobic tank 3. The dust suction hood is installed at the end of the sludge reflux pipe 53. The dust suction hood is located at the bottom of the inner cavity of the membrane tank 5. The sludge reflux pump 54 is installed on the sludge reflux pipe 53. When the particle content in the water flow passing through the membrane filtration in the membrane tank 5 rises to the specified value, the sludge reflux pump 54 can transport the water flow in the membrane tank 5 to the aerobic tank 3 for reprocessing through the sludge reflux pipe 53 and the dust suction hood.

[0029] Furthermore, the concentration reduction assembly 7 includes a mounting frame 71, an adsorption mesh plate 72 and a positioning block 73. The adsorption mesh plate 72 is installed inside the mounting frame 71. The mounting frame 71 is slidably sleeved inside the water flow channel. The aperture of the adsorption mesh plate 72 is 10 to 15 millimeters. The aperture of the adsorption mesh plate 72 is larger than the diameter of the particles in the water flow, and it cannot filter the particles, thus not affecting the water flow rate in the water flow channel. However, the adsorption mesh plate 72 is woven from threads made of carbon fiber, cotton fiber, and polyester fiber, so that it has a certain adsorption property, thereby reducing the concentration of solid particles in the liquid again, and further reducing the particle content of the water flow entering the membrane tank 5. One side of the positioning block 73 is fixedly connected to the inclined plate 6, the top of the positioning block 73 is fitted with the mounting frame 71, the top of the mounting frame 71 is fixedly connected with a fixing bracket 74, the top of the fixing bracket 74 is fixedly connected with a positioning rod 75, the top of the outer wall of the positioning rod 75 is slidably sleeved with a positioning collar 76, and the top of the positioning collar 76 is fixedly connected to the top inner wall of the intermediate tank 4, that is, the positioning collar 76 is fixedly connected to the plate cover at the top of the intermediate tank 4. By removing the plate cover, the concentration reduction assembly 7 can be taken out for disassembly and maintenance.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for reducing the concentration of mixed liquor suspended solids in an MBR system, comprising a membrane tank (5), characterized in that, Including: A degassing tank (1), an anoxic tank (2) and an aerobic tank (3), the degassing tank (1), the anoxic tank (2) and the aerobic tank (3) are fixedly connected in sequence, and the aerobic tank (3) is arranged on one side of the membrane tank (5); An intermediate tank (4), the intermediate tank (4) is fixedly connected to the side of the aerobic tank (3) facing the membrane tank (5), and a water inlet hole (41) communicating with the aerobic tank (3) is opened at the bottom of one side of the intermediate tank (4); An inclined plate (6) and a concentration reduction component (7), the inclined plate (6) is fixedly installed in the middle of the inner cavity of the intermediate tank (4) in an inclined state, and an inclined upward water flow channel is formed between adjacent inclined plates (6), and the concentration reduction component (7) is installed inside the water flow channel.

2. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 1, wherein A second water outlet hole (43) is opened at the top of one side of the intermediate tank (4), a water flow pipeline is installed between the second water outlet hole (43) and the membrane tank (5), and a water outlet pipe (51) is installed on one side of the membrane tank (5), and a water outlet pump (52) is arranged on the water outlet pipe (51).

3. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 1, wherein A water inlet pipe is arranged at the top of the degassing tank (1), a first reflux component is arranged between the intermediate tank (4) and the degassing tank (1), and a second reflux component is arranged between the membrane tank (5) and the aerobic tank (3).

4. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 3, characterized in that, The first reflux component includes: An internal reflux pipe (44), the internal reflux pipe (44) is installed between the intermediate tank (4) and the degassing tank (1), and a first water outlet hole (42) matching the internal reflux pipe (44) is opened at the bottom of one side of the intermediate tank (4); An internal reflux pump (45), the internal reflux pump (45) is installed on the internal reflux pipe (44).

5. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 3, wherein The second reflux component includes: A sludge reflux pipe (53) and a dust suction hood, the sludge reflux pipe (53) is installed between the membrane tank (5) and the aerobic tank (3), the dust suction hood is installed at the end of the sludge reflux pipe (53), and the dust suction hood is located at the bottom of the inner cavity of the membrane tank (5); A sludge reflux pump (54), the sludge reflux pump (54) is installed on the sludge reflux pipe (53).

6. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 1, characterized in that, The concentration reduction component (7) includes: An installation frame (71) and an adsorption mesh plate (72), the adsorption mesh plate (72) is installed inside the installation frame (71), and the installation frame (71) is slidably sleeved inside the water flow channel; A positioning block (73), one side of the positioning block (73) is fixedly connected to the inclined plate (6), and the top of the positioning block (73) is attached to the installation frame (71).

7. The device for reducing the concentration of mixed liquor suspended solids in an MBR system according to claim 6, wherein A fixed support (74) is fixedly connected to the top of the installation frame (71), a positioning rod (75) is fixedly connected to the top of the fixed support (74), a positioning collar (76) is slidably sleeved on the top of the outer wall of the positioning rod (75), and the top of the positioning collar (76) is fixedly connected to the top of the inner wall of the intermediate tank (4).

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