Novel aeration device for membrane module device

Abstract

The utility model relates to the field of membrane pool aeration, and provides a novel aeration device for a membrane module device, which comprises a membrane pool and a membrane module device, the membrane module device is detachably mounted in the membrane pool, and the membrane module device comprises membrane wires; the membrane module device further comprises a membrane frame, a membrane wire mounting cross beam is arranged on the membrane frame, and the membrane wires are vertically mounted on the membrane wire mounting cross beam on the membrane frame; according to the utility model, the aeration pipe at the bottom of the membrane module device is reconstructed and is arranged on the membrane frame, so that the problems that the PVC pipe is generally loosened and damaged due to the influence of aeration vibration during perforation aeration are solved; meanwhile, the strip-shaped hole is formed in the aeration pipe, so that the condition that the aeration pipe is easy to cause sludge hardening to block a perforated hole and the like is solved, the aeration efficiency of the membrane module device is improved, and the blowing air quantity is reduced; meanwhile, the aeration pipes are mounted at the upper and lower parts, so that the aeration efficiency is high, and membrane pollution is reduced.

Description

Technical Field

[0001] This utility model relates to the field of membrane tank aeration, and in particular to a novel aeration device for membrane modules. Background Technology

[0002] Currently, the 150,000-ton MBR membrane tank in the wastewater treatment plant has a total of 272 membrane modules. The purging aeration all uses a perforated PVC pipe at the bottom. The three main purging aeration methods are perforated aeration, trough aeration, and large-bubble pulse aeration. The PVC pipes are connected to the membrane frame via unions, and have downward-facing sludge discharge ports in the middle. After four years of operation and inspection, it was found that the PVC pipes are generally loose, damaged, and have sludge compaction clogging the perforations due to aeration vibrations. This leads to uneven aeration in the membrane modules, and even a complete lack of aeration, resulting in a sharp increase in membrane fouling. Specifically:

[0003] When the perforated aeration is directed upwards, the resistance of the pores is relatively small. However, the gas in the purge pipe floats on the surface of the mixed liquid. If the purge pores are too large or the airflow in the purge pipe is insufficient, the sludge cannot be completely discharged due to the gas not filling the purge pipe, causing some pores to become blocked. When the perforated aeration is directed downwards, the purge airflow first empties the sludge in the purge pipe and then overcomes the orifice resistance before entering the normal purge state. This design makes it easier to maintain uniform purge airflow. However, because the orifice is downwards, the initial driving force of the purge airflow is very large, requiring a long tailpipe to prevent air leakage caused by the impact of the airflow when the purge airflow starts.

[0004] The trough aeration is an aeration structure evolved from perforated pipe aeration. It has a square trough shape with an open bottom and purge air holes located on both sides of the trough. It completely solves the problem of sludge accumulation and clogging of aeration pipes. However, it is still the same as perforated pipe aeration in principle, and it has to overcome a large air intake resistance. It does not have an advantage in aeration energy consumption compared to perforated pipe aeration, and it cannot completely guarantee that the air will be evenly filled in the aeration trough.

[0005] Compared with traditional perforated pipe aeration or trough aeration, large bubble pulse aeration significantly improves the cleaning effect on the membrane and is a superior aeration method. However, the technology is not yet mature, the flipping component has a high risk of failure after long-term use, or the U-shaped connecting pipe has the risk of blockage and is not easy to clean. Utility Model Content

[0006] This utility model proposes a novel aeration device for membrane modules. By reconstructing the aeration pipe at the bottom of the membrane module and installing it on the membrane frame, it solves the common problem of loosening and damage caused by aeration vibration in PVC pipe perforated aeration. At the same time, it opens elongated holes in the aeration pipe to solve the problems of sludge caking, blockage, and perforation in the aeration pipe, thereby improving the aeration efficiency of the membrane module and reducing the purge air volume. In addition, aeration pipes are installed at both the top and bottom, resulting in high aeration efficiency and reducing membrane fouling.

[0007] The technical solution of this utility model is implemented as follows:

[0008] A novel aeration device for a membrane module includes: a membrane tank and a membrane module, wherein the membrane module is detachably installed in the membrane tank and the membrane module includes membrane fibers;

[0009] The membrane module also includes a membrane frame, on which a membrane fiber mounting beam is provided, and the membrane fibers are vertically mounted on the membrane fiber mounting beam on the membrane frame;

[0010] It also includes an aeration device, which includes a blower, an air supply pipe, an aeration pipe and a diffusion structure. The air supply pipe is connected to the blower, the aeration pipe is detachably connected to the air supply pipe, and the diffusion structure of the aeration pipe is connected to the aeration pipe.

[0011] The membrane frame includes a top frame, a bottom frame, and four side rods. The top frame is installed at the top of the four side rods, and the bottom frame is installed at the bottom of the four side rods.

[0012] The aeration pipes are installed on both the top frame and the bottom frame.

[0013] Furthermore, the diffusion structure is an air outlet;

[0014] The air outlet is elongated;

[0015] The air outlet is located on the aeration pipe.

[0016] Furthermore, the air outlet is parallel to the axis of the aeration pipe.

[0017] Furthermore, the air vents on the top frame and the air vents on the bottom frame are arranged in a staggered manner.

[0018] Furthermore, both the top frame and the bottom frame are mesh frames;

[0019] A fixing ring is provided on the grid frame, and the aeration pipe is installed inside the fixing ring.

[0020] Furthermore, a U-shaped buckle is provided at the bottom of the fixing ring. The U-shaped buckle is installed on the grid frame by means of a buckle, and at the same time, the U-shaped buckle is detachably installed on the grid frame by bolts.

[0021] Furthermore, the aeration pipe is coiled around the top or bottom frame in circles.

[0022] Furthermore, the aeration pipes are continuously wound around the top frame or bottom frame one by one.

[0023] Furthermore, the membrane fiber mounting beams are provided both below the top frame and above the bottom frame, with the upper and lower ends of the membrane fiber respectively mounted on the membrane fiber mounting beams.

[0024] This invention solves the common problem of loosening and damage caused by aeration vibration in PVC pipe perforated aeration units by reconstructing the bottom aeration pipe of the membrane module and installing it on the membrane frame. At the same time, it opens long holes in the aeration pipe to solve the problems of sludge caking, blockage and perforation in the aeration pipe, thereby improving the aeration efficiency of the membrane module and reducing the purge air volume. In addition, aeration pipes are installed at both the top and bottom, resulting in high aeration efficiency and reducing membrane fouling. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a novel aeration device for a membrane module according to a specific embodiment of the present utility model;

[0027] Figure 2 for Figure 1 The diagram shows the cooperation structure of a novel aeration device for membrane modules and a portion of the aeration structure.

[0028] Figure 3 for Figure 1 , Figure 2 A top view of the mating structure of the aeration pipe and the bottom frame of a novel aeration device for membrane modules.

[0029] Figure 4 for Figure 3 The diagram shows the structure of the base frame.

[0030] Figure 5 for Figure 3 The diagram shown is a schematic of the aeration pipe structure.

[0031] Figure 6 for Figure 5 The diagram shows the structure of the fixing ring used to install the aeration pipe on the bottom frame.

[0032] Figure 7 This is a schematic diagram of the cooperation structure between the membrane module and the aeration pipe of the aeration structure in a specific embodiment two of this utility model;

[0033] Figure 8 for Figure 7 The diagram shows a top view of the aeration pipe.

[0034] Explanation of reference numerals in the attached drawings: membrane module 1; membrane fiber 11; membrane frame 12; top frame 121; bottom frame 122; side rod 123; fixing ring 124; U-shaped buckle 125; bolt 126; membrane fiber mounting beam 13; aeration device 2; blower 21; air supply pipe 22; aeration pipe 23; air outlet 24. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0036] In a specific embodiment of this utility model, see Figures 1-6 A novel aeration device for a membrane module includes: a membrane tank and a membrane module 1, wherein the membrane module 1 is detachably installed in the membrane tank and the membrane module 1 includes membrane fibers 11.

[0037] The membrane module 1 also includes a membrane frame 12, on which a membrane fiber mounting beam 13 is provided, and the membrane fibers 11 are vertically mounted on the membrane fiber mounting beam 13 on the membrane frame 12;

[0038] It also includes an aeration device 2, which is set to prevent sludge and other debris from depositing on the membrane fibers 11. The aeration device 2 includes a blower 21, an air supply pipe 22, an aeration pipe 23 and a diffusion structure. The air supply pipe 22 is connected to the blower 21, the aeration pipe 23 is detachably connected to the air supply pipe 22, and the diffusion structure of the aeration pipe is connected to the aeration pipe.

[0039] To further improve the aeration effect and prevent sediment from clogging the air outlets, the aeration structure 2 was improved. First, the installation position of the aeration pipe 23 on the membrane frame 12 was modified, specifically as follows:

[0040] The membrane frame 12 includes a top frame 121, a bottom frame 122, and four side rods 123. The top frame 121 is installed at the top of the four side rods 123, and the bottom frame 122 is installed at the bottom of the four side rods 123.

[0041] The aeration pipe 23 is installed on both the top frame 121 and the bottom frame 122;

[0042] Therefore, air can be blown at both the top and bottom of the membrane fiber 11 simultaneously, improving the aeration effect, effectively preventing sludge deposition on the membrane fiber 11, and reducing membrane fouling.

[0043] In a specific embodiment of this utility model, see Figures 1-6 The membrane fiber mounting beam 13 is provided below the top frame 121 and above the bottom frame 122, and the upper and lower ends of the membrane fiber 11 are respectively mounted on the membrane fiber mounting beams at both ends.

[0044] In a specific embodiment of this utility model, see Figures 1-6 The diffusion structure is an air outlet 24, which eliminates the original aeration disc. The air outlet produces large air bubbles, which has a good aeration effect and can effectively prevent sludge accumulation on the membrane fibers and reduce membrane fouling.

[0045] The air outlet 24 is elongated, which makes it less prone to mud accumulation and effectively prevents the air outlet from being blocked.

[0046] The air outlet is located on the aeration pipe.

[0047] In a specific embodiment of this utility model, see Figures 1-6 The air outlet 24 is parallel to the axis of the aeration pipe 23, that is, the length of the air outlet 24 is the same as the length of the aeration pipe 23, which can effectively prevent the air outlet 24 from being blocked and increase the aeration volume.

[0048] In a specific embodiment of this utility model, see Figures 1-6 The air vents on the top frame 121 and the air vents on the bottom frame 122 are staggered. This staggered arrangement of the upper and lower air vents can improve the vibration of the membrane fibers 11, further prevent the accumulation of mud on the membrane fibers 11, and further reduce membrane fouling.

[0049] In a specific embodiment of this utility model, see Figures 1-6 Both the top frame 121 and the bottom frame 122 are grid frames;

[0050] A fixing ring 124 is provided on the grid frame, and the aeration pipe 23 is installed inside the fixing ring 124;

[0051] Setting the top frame 121 and the bottom frame 122 as a grid frame can facilitate the installation of the aeration pipe 23 and provide support for the aeration pipe 23.

[0052] In a specific embodiment of this utility model, see Figures 1-6 The bottom of the fixing ring 124 is provided with a U-shaped buckle 125. The U-shaped buckle 125 is installed on the grid frame by buckling. At the same time, the U-shaped buckle 125 is detachably installed on the grid frame by bolts 126.

[0053] Use U-shaped clips 125 to fix the aeration pipe 23 to ensure its stability.

[0054] In a specific embodiment of this utility model, see Figures 1-6 The aeration pipe 23 is coiled around the top frame 121 or the bottom frame 122 in a spiral pattern, such as a U-shape, or it can be continuously coiled. In this case, the airflow is stronger and the membrane fibers vibrate more comprehensively, which can further reduce membrane fouling.

[0055] In the second specific embodiment of this utility model, see Figures 7-8 The aeration pipes 23 are continuously wound around the top frame 121 or the bottom frame 122 in an S-shape. This type of pipe is easier to install, has stronger air output, and provides good membrane fiber vibration, which can effectively reduce membrane fouling.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel aeration device for membrane modules, comprising: A membrane tank and a membrane module, wherein the membrane module is detachably installed in the membrane tank and the membrane module includes membrane fibers; The feature is that the membrane module further includes a membrane frame, on which a membrane fiber mounting beam is provided, and the membrane fibers are vertically mounted on the membrane fiber mounting beam on the membrane frame; It also includes an aeration device, which includes a blower, an air supply pipe, an aeration pipe and a diffusion structure. The air supply pipe is connected to the blower, the aeration pipe is detachably connected to the air supply pipe, and the diffusion structure of the aeration pipe is connected to the aeration pipe. The membrane frame includes a top frame, a bottom frame, and four side rods. The top frame is installed at the top of the four side rods, and the bottom frame is installed at the bottom of the four side rods. The aeration pipes are installed on both the top frame and the bottom frame.

2. The novel aeration device for membrane modules as described in claim 1, characterized in that: The diffusion structure is an air outlet; The air outlet is elongated; The air outlet is located on the aeration pipe.

3. The novel aeration device for membrane modules as described in claim 2, characterized in that: The air outlet is parallel to the axis of the aeration pipe.

4. The novel aeration device for a membrane module as described in claim 2, characterized in that: The air vents on the top frame and the air vents on the bottom frame are arranged in a staggered manner.

5. The novel aeration device for a membrane module as described in claim 1, characterized in that: Both the top frame and the bottom frame are grid frames; A fixing ring is provided on the grid frame, and the aeration pipe is installed inside the fixing ring.

6. The novel aeration device for a membrane module as described in claim 5, characterized in that: The bottom of the fixing ring is provided with a U-shaped buckle, which is installed on the grid frame by means of a buckle. At the same time, the U-shaped buckle is detachably installed on the grid frame by bolts.

7. A novel aeration device for a membrane module as described in claim 1, characterized in that: The aeration pipe is coiled around the top or bottom frame in circles.

8. The novel aeration device for a membrane module as described in claim 1, characterized in that: The aeration pipes are continuously wound around the top frame or bottom frame one by one.

9. A novel aeration device for a membrane module as described in claim 1, characterized in that: The membrane fiber mounting beam is provided below the top frame and above the bottom frame, with the upper and lower ends of the membrane fiber respectively mounted on the membrane fiber mounting beam.

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