Immersed membrane module

Abstract

The invention discloses an immersed membrane module, and belongs to the technical field of sewage treatment. The immersed membrane component comprises a gas inlet pipe, a gas collection component, a gas distribution component, an outer cover and an aeration base, and the gas collection component comprises a central pipe arranged in the outer cover and a gas collection cover arranged on the central pipe in a sleeving manner. The groove is formed in the top of the outer cover and communicated with the central pipe, the sealing frame is located at the bottom of the aeration base, the gas separation frame is installed in the sealing frame, and an aeration head communicated with the groove is installed on the aeration base. A plurality of sludge discharge pipes in one-to-one correspondence with the aeration heads are also arranged below the outer cover. The sludge discharge pipe is directly arranged below the air distribution assembly, sludge in the aerator can enter the sludge discharge pipe through the groove and then is discharged out of the aerator, the sludge cannot be accumulated in the aerator, the air inlet end of the central pipe is higher than the outlet end of the sludge discharge pipe, the sludge cannot be sucked into the aerator again, and the sludge discharge effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an immersed membrane assembly. Background Art

[0002] In order to reduce membrane fouling, continuous aeration is generally used to continuously flush the membrane surface so that the membrane flux can be restored. The working principle of pulse aeration is to accumulate continuous and stable airflow. When the airflow accumulates to a set amount, aeration with high flow and large bubbles is instantly generated. This aeration can remove sludge, scale, microorganisms and other sediments accumulated on the membrane surface, and at the same time can more effectively remove pollutants on the membrane. Therefore, energy-saving and efficient pulse aeration has become the best choice for membrane scrubbing processes. However, in actual use, the aerator instantly generates a vacuum after aeration, which will quickly re-absorb the sludge and water into the aerator. Over time, the sludge will accumulate in the aerator, blocking the gas release channel and causing aeration failure.

[0003] CN112250170B discloses an immersed membrane assembly and a membrane assembly device including the immersed membrane assembly, wherein a mud discharge pipe is provided at the tail end of the air supply pipe, and the mud inlet of the mud discharge pipe is directly connected to the tail end opening of the air supply pipe for discharging sludge and other debris in the water pipe. However, in actual application, the air supply pipe is arranged horizontally, and the mud discharge pipe is arranged at the tail end of the air supply pipe. During the discharge process, a large part of the sludge will be deposited at the bottom of the horizontally arranged air supply pipe, and the mud discharge pipe is poor in effect; moreover, the sludge will be siphoned into the aerator after aeration. This patent does not design a mud discharge structure in the air outlet pipe, and the sludge is very easy to be deposited in the air outlet pipe, blocking the release of gas, causing the aeration channel to be blocked and the aeration to fail. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an immersed membrane assembly, which can effectively discharge the sludge in the aerator and avoid aeration failure of the aerator.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A submerged membrane module comprises an air inlet pipe, an air collecting assembly and an air distribution assembly, and also comprises an outer cover and an aeration base mounted on the top of the outer cover. The air collecting assembly comprises a central tube arranged in the outer cover and an air collecting cover sleeved on the central tube. The gas separation assembly includes a groove arranged at the top of the outer cover, a sealing frame installed at the bottom of the aeration base, and an air separation frame arranged in the sealing frame. The sealing frame and the groove are arranged opposite to each other to form an air storage cavity. The middle of the groove is provided with an air collecting hole connected to the central tube. The air separation frame evenly divides the air storage cavity into a plurality of air separation cavities. The aeration base is provided with air separation holes corresponding to the air separation cavities one by one. An aeration head is installed on the air separation holes. The outer cover is further provided with a plurality of mud discharge pipes corresponding to the air distribution holes one by one, the groove is provided with mud discharge holes matching the mud discharge pipes, the upper ends of the mud discharge pipes are connected to the air distribution cavity through the mud discharge holes, and the lower ends of the mud discharge pipes extend downwardly from the outer cover; The lower end of the air inlet pipe extends into the outer cover, and the part of the air inlet pipe located in the outer cover is provided with an air outlet hole, the height of the air outlet hole is higher than the height of the air inlet end of the central pipe, and the height of the air inlet end of the central pipe is higher than the height of the outlet end of the mud discharge pipe.

[0006] Furthermore, the upper end of the air inlet pipe is used to connect to the air supply equipment, and the lower end of the air inlet pipe extends into the outer cover to supply air to the air collecting assembly. The number of air outlet holes on the air inlet pipe is 1-2.

[0007] Furthermore, the number of the aeration heads and the number of the mud discharge pipes are both four.

[0008] Furthermore, the aeration head is hollow inside and has an enlarged top, and a plurality of aeration holes are evenly arranged on the side wall of the upper end portion of the aeration head.

[0009] Furthermore, there is a gap between the inner wall of the air collecting hood and the outer wall of the central tube, and a drainage hole is provided at the bottom of the air collecting hood.

[0010] Furthermore, the air separator is cross-shaped.

[0011] Furthermore, a positioning seat that matches the air inlet pipe is provided on the top of the outer cover, and a positioning hole that matches the positioning seat is provided on the aeration base.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a mud discharge pipe directly below the gas separation component (gas release part). After aeration, the siphoned sludge can be directly discharged from the aerator through the mud discharge hole and the mud discharge pipe. The sludge will not accumulate in the aerator. In addition, the air inlet end of the central pipe is higher than the outlet end of the mud discharge pipe. The sludge will not be re-sucked into the aerator, and the mud discharge effect is good. 2. In the present invention, the air inlet pipe is arranged longitudinally, the air inlet is at the highest height, and a small amount of gas is continuously supplied in the positive pressure part, so the air inlet pipe will not be blocked; 3. The aeration holes of the aeration head of the present invention are arranged on the side wall, and the top of the aeration head is expanded, which can effectively prevent the sludge shaken off by the membrane fibers from naturally settling and clogging the aeration head; 4. In the present invention, the mud discharge pipe is located at the lowest position relative to the air outlet of the air inlet pipe and the air inlet end of the central pipe. In this way, the arrangement of the mud discharge pipe will not affect gas collection and aeration, and can also prevent the discharged sludge from being siphoned into the aerator after the next aeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1Schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic structural diagram of an aeration base in an embodiment of the present invention; Figure 3 This is a schematic structural diagram of the outer cover in an embodiment of the present invention; Figure 4 is a schematic top view of the structure of an embodiment of the present invention; Figure 5 yes Figure 4 AA cross-section of 1. Aeration base; 2. Outer cover; 3. Mud discharge pipe; 4. Air collecting cover; 5. Air inlet pipe; 6. Aeration head; 7. Center pipe; 100. Sealing frame; 101. Air distribution hole; 102. Air separator; 103. Positioning hole; 200. Groove; 201. Air collecting hole; 202. Positioning seat; 203. Mud discharge hole. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] like Figures 1 to 5 As shown, this embodiment is an immersed membrane assembly, including an outer cover 2, an air inlet pipe 5, an aeration base 1, an air collecting assembly and an air separation assembly. The outer cover 2 is arranged longitudinally, and the lower end of the outer cover 2 is open. The aeration base 1 is located above the outer cover 2, and the top of the outer cover 2 is provided with a groove 200 that cooperates with the bottom of the aeration base 1.

[0016] The upper end of the air inlet pipe 5 is used to connect to the air supply equipment, and the lower end of the air supply pipe extends into the outer cover 2 to supply air to the air collection assembly.

[0017] The gas collecting assembly includes a central tube 7 arranged in the outer cover 2 and a gas collecting hood 4 sleeved on the central tube 7. The central tube 7 is arranged longitudinally, and the lower end of the central tube 7 is the air inlet end. The upper end of the central tube 7 is connected to the lower side wall of the top of the gas collecting hood 4, and the top of the gas collecting hood 4 is provided with a gas collecting hole 201 that cooperates with the central tube 7.

[0018] like Figures 1 to 5As shown, the gas separation component includes a groove 200 provided at the top of the outer cover 2, a sealing frame 100 installed at the bottom of the aeration base 1, and an air separation frame 102 provided in the sealing frame 100. The groove 200 cooperates with the sealing frame 100, the upper end of the sealing frame 100 is connected to the bottom of the aeration base 1, and the lower end of the sealing frame 100 extends downward into the groove 200. The sealing frame 100 and the groove 200 are arranged relative to each other to form an air storage cavity. The air separation frame 102 evenly divides the air storage cavity into a plurality of air separation cavities. The aeration base 1 is provided with a plurality of air separation holes 101 corresponding to the air separation cavities. The air separation holes 101 are sealed with an aeration head 6, and the aeration head 6 is connected to the air separation cavity through the air separation holes 101.

[0019] Specifically, the air collecting hole 201 in this embodiment is provided in the middle of the groove 200 .

[0020] Specifically, in this embodiment, the groove 200 and the sealing frame 100 are in an X-shape.

[0021] The outer cover 2 is further provided with a plurality of mud discharge pipes 3 corresponding to the air distribution holes 101 one by one. The groove 200 is provided with mud discharge holes 203 that match the mud discharge pipes 3. The upper end of the mud discharge pipe 3 is connected to the groove 200 through the mud discharge holes 203, and the lower end of the mud discharge pipe 3 extends downward from the outer cover 2.

[0022] Furthermore, the portion of the air inlet pipe 5 located inside the outer cover 2 is provided with a plurality of air outlet holes, the height of the air outlet holes being higher than the air inlet end of the central pipe 7 , and the height of the air inlet end of the central pipe 7 being higher than the outlet end of the mud discharge pipe 3 .

[0023] Specifically, in this embodiment, the distance between the outlet end of the mud discharge pipe 3 and the air inlet end of the central pipe 7 is 3-7 centimeters.

[0024] Specifically, the air separator 102 in this embodiment is cross-shaped, which evenly divides the air storage cavity into four sub-cavities. There are four aeration heads 6 and four mud discharge pipes 3. The air collecting hole 201 is located at the center of the cross-shaped air separator 102.

[0025] Furthermore, the number of the air outlet holes on the air inlet pipe 5 in the outer cover 2 is 1-2, and specifically in this embodiment, the number of the air outlet holes is two.

[0026] Furthermore, the aeration head 6 is hollow inside and has an enlarged top, and a plurality of aeration holes are evenly arranged on the side wall of the upper end portion of the aeration head 6 .

[0027] Furthermore, there is a gap between the inner wall of the gas collecting hood 4 and the outer wall of the central tube 7, and a drainage hole is provided at the bottom of the gas collecting hood 4.

[0028] Furthermore, a positioning seat 202 cooperating with the air inlet pipe 5 is provided on the top of the outer cover 2, and a positioning hole 103 cooperating with the positioning seat 202 is provided on the aeration base 1.

[0029] Specifically, in this embodiment, the height of the groove 200 is the same as that of the sealing frame 100 , and the height of the air separator 102 is the same as that of the groove 200 .

[0030] During installation, the aeration base 1 is installed with its bottom facing downward into the groove 200 at the top of the outer cover 2. After installation, the sealing frame 100 at the bottom of the aeration base 1 extends into the groove 200, and the bottom of the aeration base 1 contacts the top of the outer cover 2. The sealing frame 100 and the groove 200 then form an air storage chamber, which is then divided into four sub-cavities by the air divider 102. The aeration base 1 has air holes 101 corresponding to each sub-cavity. The aeration head 6 is then sealed and mounted on the aeration base 1 through the air holes 101. After the gas collection assembly and mud discharge pipe 3 are installed in the outer cover 2, the air inlet pipe 5 extends downward through the positioning hole 103 and the positioning seat 202 and into the outer cover 2.

[0031] During aeration in this embodiment, the outlet holes at the lower end of the air inlet pipe 5 continuously deliver small amounts of air. The air enters the central tube 7 through the gap between the central tube 7 and the air collecting hood 4 for collection. During the collection process, the water level in the air collecting hood 4 drops. The air in the central tube 7 is separated by the air collecting holes 201 and the air separator 102, enters the air separation chamber, and then enters the aeration head 6 through the air separation holes 101 for aeration.

[0032] One of the sludge discharge effects of this embodiment is that a sludge discharge pipe 3 is longitudinally arranged in the gas release part. The sludge siphoned in after aeration will be discharged downward through the air separation cavity, the sludge discharge hole 203, and the sludge discharge pipe 3, and will not be accumulated in the air separation cavity. Since the sludge sucked in during the aeration process is discharged in time, it will not cause clogging of the aeration channel, effectively solving the aeration failure caused by sludge blockage.

[0033] The second mud discharge effect of this embodiment is that: the air inlet pipe 5 is arranged longitudinally, the air outlet is high, and a small amount of gas is continuously supplied in a positive pressure state, and the air inlet part will not be blocked.

[0034] The third mud discharge effect of this embodiment is that: since the air outlet of the air inlet pipe 5 and the air inlet end of the central pipe 7 are both higher than the mud discharge port height of the mud discharge pipe 3, the setting of the mud discharge pipe 3 will not affect the air collection and aeration, and the discharged sludge will not re-enter the air separation chamber with the water.

Claims

1. A submerged membrane assembly, comprising an air inlet pipe (5), an air collecting assembly and an air distributing assembly, characterized in that: It also includes an outer cover (2) and an aeration base (1) mounted on the top of the outer cover (2), and the gas collection assembly includes a central tube (7) arranged in the outer cover (2) and an air collection cover (4) sleeved on the central tube (7); The gas separation component comprises a groove (200) arranged at the top of the outer cover (2), a sealing frame (100) installed at the bottom of the aeration base (1), and an air separation frame (102) arranged in the sealing frame (100); the sealing frame (100) and the groove (200) are arranged opposite to each other to form an air storage cavity; a gas collecting hole (201) communicating with the central tube (7) is provided in the middle of the groove (200); the air separation frame (102) evenly divides the air storage cavity into a plurality of air separation cavities; the aeration base (1) is provided with air separation holes (101) corresponding to the air separation cavities one by one; an aeration head (6) is installed on the air separation hole (101); The outer cover (2) is further provided with a plurality of mud discharge pipes (3) corresponding one-to-one with the air distribution holes (101); the groove (200) is provided with mud discharge holes (203) matching the mud discharge pipes (3); the upper ends of the mud discharge pipes (3) are connected to the air distribution cavity through the mud discharge holes (203); and the lower ends of the mud discharge pipes (3) extend downwardly from the outer cover (2); The lower end of the air inlet pipe (5) extends into the outer cover (2), and the portion of the air inlet pipe (5) located inside the outer cover (2) is provided with an air outlet hole, the height of the air outlet hole being higher than the height of the air inlet end of the central pipe (7), and the height of the air inlet end of the central pipe (7) being higher than the height of the outlet end of the mud discharge pipe (3).

2. The submerged membrane module according to claim 1, wherein: The upper end of the air inlet pipe (5) is used to connect to the air supply equipment, and the lower end of the air inlet pipe (5) extends into the outer cover (2) to supply air to the air collection component. The number of air outlet holes on the air inlet pipe (5) is 1-2.

3. The submerged membrane module according to claim 1, wherein: The number of the aeration heads (6) and the number of the mud discharge pipes (3) are both four.

4. The submerged membrane module according to any one of claims 1 to 3, wherein: The aeration head (6) is hollow inside and has an enlarged top, and a plurality of aeration holes are evenly arranged on the side wall of the upper end portion of the aeration head (6).

5. The submerged membrane module according to claim 4, wherein: There is a gap between the inner wall of the gas collecting hood (4) and the outer wall of the central tube (7), and a drainage hole is provided at the bottom of the gas collecting hood (4).

6. The submerged membrane module according to claim 4, wherein: The air separator (102) is cross-shaped.

7. The submerged membrane module according to claim 4, wherein: A positioning seat (202) that matches the air inlet pipe (5) is provided on the top of the outer cover (2), and a positioning hole (103) that matches the positioning seat (202) is provided on the aeration base (1).

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