Aeration structure of membrane module and membrane module comprising aeration structure

Abstract

The utility model provides an aeration structure of a membrane module and the membrane module comprising the aeration structure, which can improve the cleaning effect on the middle and upper parts of membrane filaments on the premise of ensuring that aeration holes are not blocked. The aeration structure of the membrane module comprises an outer cover and an aeration pipe, the upper end of the aeration pipe penetrates through the top of the outer cover and then is communicated with a gas distributor, a gas distribution channel is arranged on the gas distributor, a gas distribution through hole is formed in an outlet of the gas distribution channel, an aeration head is fixed at the upper end of the gas distribution through hole, the aeration head is provided with a hollow body, the top of the body is closed, and aeration holes are formed in the side wall of the body. The top of the body is closed, air is discharged from the side face of the body, and sludge or pollutants can be prevented from falling to block the aeration holes. By arranging the aeration head and forming the aeration holes in the side wall of the aeration head, sludge scaling, microorganisms and other sediments are prevented from easily falling down to block the aeration holes, meanwhile, the height of the aeration holes is increased, the middle-upper parts of the membrane filaments are more easily in contact with bubbles, and the cleaning effect of the middle-upper parts of the membrane filaments is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aeration structure technical field of membrane module, concretely relates to aeration structure of membrane module and contain the aeration structure of membrane module. BACKGROUND

[0002] In order to reduce membrane pollution, generally adopt the way of continuous aeration to the surface of membrane filament is not interrupted flushing, so that the membrane flux can be recovered, the working principle of pulse aeration is, the continuous stable airflow is accumulated, when the airflow accumulation is set amount, the high flow big bubble aeration of instant is generated, the aeration can make the sludge scale, microorganism and other deposits on the membrane surface fall off, and can remove the pollutant on the membrane more effectively, therefore energy-saving high efficiency pulse aeration becomes the best choice of membrane scrubbing process, but in the actual use process, aeration port is usually set to the direction of membrane filament, so that sludge scale, microorganism and other deposits are easy to fall and block the aeration port when aeration flushing, causes aeration failure.

[0003] CN218810815U discloses a kind of pulse aeration device of membrane module, including gas supply device, gas collection device and aeration device;Gas collection device includes the gas collection cavity of bottom open, gas collection cavity is separated into several gas collection units by baffle, one aeration pipe is arranged in each gas collection unit, the upper opening of aeration pipe is arranged on top plate, and lower opening is communicated with gas collection cavity;Gas supply device includes vertically connected gas supply pipe, horizontal gas supply pipe and vertically downward extending sludge discharge pipe, horizontal gas supply pipe is arranged at the bottom of gas collection cavity, and its upper side is provided with a plurality of gas supply holes communicated with gas collection cavity, and the bottom of sludge discharge pipe is provided with sludge discharge port.The utility model adopts aeration and sludge discharge integrated design, not only realizes the effect of pulse aeration scrubbing membrane filament, and solves the problem of existing technology gas supply channel, aeration port exists mud blockage risk, and makes sludge discharge intensity higher, and sludge discharge effect is better.

[0004] But in the above structure, to ensure aeration effect, the size of each outlet of gas distributor should not be too large, which causes the height of each outlet of gas distributor to be set lower, the height of bubble generation to be lower, and it is difficult to ensure that bubbles can reach the middle or even top of membrane filament, so as to affect the cleaning effect of middle or upper part of membrane filament. Utility model content

[0005] The utility model discloses a kind of aeration structure of membrane module and contain the aeration structure of membrane module to solve the problems in the background art, improve the cleaning effect of middle or upper part of membrane filament under the premise of ensuring that aeration hole is not blocked.

[0006] The technical scheme adopted by the utility model is:

[0007] The aeration structure of the membrane module comprises an outer cover 55, an aeration pipe 53 and a gas distributor 57, the upper end of the aeration pipe 53 penetrates the top of the outer cover 55 and communicates with the gas distributor 57, and the gas distributor 57 is provided with a gas distribution hole 571, characterized in that the upper end of the gas distribution hole 571 is fixed with an aeration head 54, the aeration head 54 has a hollow body, the top of the body is closed, and the side wall is provided with an aeration hole 541. The top of the body is closed, and the side of the body is provided with the aeration hole 541, which can prevent the silt or pollutants from falling and blocking the aeration hole 541.

[0008] Preferably, the aeration hole 541 on each aeration head 54 is 2-4, uniformly distributed along the body. Preferably, there are four, which can aerate in four directions.

[0009] Preferably, the top of the body of the aeration head 54 is enlarged. It can block the silt or pollutants, preventing the silt or pollutants from falling and blocking the aeration hole 541.

[0010] Preferably, the outer wall of the body of the aeration head 54 is provided with a groove 542. When pouring resin between the middle assembly body and the base 2, the groove can increase the firmness between the body of the aeration head 54 and the resin, preventing delamination.

[0011] Preferably, the outer edge of the bottom of the aeration head 54 is provided with a positioning hole 543, and the gas distributor 57 is clamped at the positioning hole 543.

[0012] Preferably, the outer cover 55 has a top and a side wall, the bottom of the outer cover 55 is open, and the outer cover 55 and the aeration pipe 53 are provided with a gas collecting cover 51 fixed to the lower surface of the top of the outer cover 55, the top of the gas collecting cover 51 and the outer cover 55 have a gap, the lower part of the gas collecting cover 51 has a drain hole, and the bottom of the aeration pipe 53 communicates with the gas collecting cover 51. The drain hole is used to quickly drain the water inside the gas collecting cover 51, otherwise the water inside the gas collecting cover 51 can only be drained from the upper part of the gas collecting cover 51, and the bottom of the aeration pipe 53 communicates with the gas collecting cover 51.

[0013] Preferably, the outer wall of the aeration pipe 53 is fixed with a supporting lug 531 to keep the relative position between the gas collecting cover 51 and the aeration pipe 53 stable, preventing the gas collecting cover 51 and the aeration pipe 53 from deforming or shifting due to uneven water pressure and air pressure.

[0014] Preferably, the inner wall or outer wall of the outer cover 55 is provided with a reinforcing rib 52 to increase the strength of the outer cover.

[0015] Preferably, the outer cover 55 is provided with an aeration structure air inlet passage 44; the aeration structure air inlet passage 44 penetrates the top of the outer cover 55.

[0016] Preferably, the top of the outer cover 55 has a containing space 59 matched with the shape of the gas distributor 57 for containing the gas distributor 57, avoiding occupying too much longitudinal space, and the longitudinal structure is more compact.

[0017] Preferably, the gas distributor 57 is provided with a gas distribution channel, and the gas distribution channel is provided with a gas distribution hole 571 at the outlet thereof.

[0018] The utility model discloses still provide a kind of membrane module comprising the aeration structure described above, the membrane module includes the integral connection big lid 6, middle component main body and aeration structure, the middle component main body includes the integral connection upper cover 1, sleeve rod 7 and base 2, gas distributor 57 is located between base 2 and the outer cover 55 of aeration structure.

[0019] Preferably, sleeve rod 7 is provided with positioning rod 3, and there is gap between positioning rod 3 and sleeve rod 7, and sleeve rod 7 can be removed from positioning rod 3;Thread is provided on both ends of positioning rod 3.

[0020] Big lid 6 is provided with hole for positioning rod 3 to pass through, and upper cover 1 and base 2 are provided with hole for sleeve rod 7 to fix, and the outer cover 55 of aeration structure is provided with thread hole matched with the bottom thread of positioning rod 3;The lower part of positioning rod 3 is sequentially threaded through big lid 6, upper cover 1 and base 2, and then is threadedly connected with the outer cover 55 of aeration structure, and the upper part of positioning rod 3 is threaded through big lid 6 and then is fastened by nut.

[0021] Positioning rod 3 and / or sleeve rod 7 are made of glass fiber reinforced plastic or stainless steel, and other materials can also be selected.

[0022] Preferably, when the membrane module is square column, there are four positioning rods 3, and the four positioning rods 3 are installed at the four corners of upper cover.

[0023] Preferably, the membrane module further comprises air inlet channel, and the air inlet channel comprises upper cover air inlet channel 41, hose 42, base air inlet channel 43 and aeration structure air inlet channel 44 connected in sequence, the upper cover air inlet channel 41 penetrates through upper cover 1, the base air inlet channel 43 penetrates through base 2, and the aeration structure air inlet channel 44 penetrates through the top of outer cover 55.

[0024] Preferably, the hose 42 is smooth hose 42 or corrugated hose.

[0025] The utility model discloses have the advantage that (1) by setting up aeration head and the mode of setting up aeration hole in the lateral wall of aeration head, prevent sludge scale, and the sediment such as microorganism is easy to fall and block aeration hole, simultaneously, increase the height of aeration hole, and the upper part of membrane filament is more easy to contact to bubble, improve the cleaning effect of the upper part of membrane filament.

[0026] The top of aeration head body is expanded, and further plays the effect of preventing blockage.

[0027] The outer wall of aeration pipe is fixed with supporting lug, which can keep the relative position relationship between gas collecting cover and aeration pipe stable, prevent the deformation or displacement of gas collecting cover and aeration pipe caused by uneven water pressure and air pressure.

[0028] The air inlet channel extends from the upper cover of the membrane assembly to the aeration structure, compared with the prior art of arranging the air inlet pipeline at the bottom of the aeration structure, the uneven bottom of the membrane pool does not need to be considered, uniform aeration can be achieved without leveling, the occupation of the space at the bottom of the membrane assembly is reduced, especially suitable for use in the case that the water level is low in the pool, and the overall structure is neat, compact and beautiful. BRIEF DESCRIPTION OF DRAWINGS

[0029] The structure, further purposes and advantages of the utility model will be better understood through the following description in combination with the drawings, wherein the same reference signs identify the same elements:

[0030] Figure 1 is the main view of the aeration structure of example 1;

[0031] Figure 2 is the three-dimensional structure schematic diagram of the aeration head of example 1;

[0032] Figure 3 is the three-dimensional split view of the membrane assembly of example 2 from the bottom upward;

[0033] Figure 4 is the air distributor schematic diagram of example 2;

[0034] Figure 5 is the main view of the membrane assembly of example 2.

[0035] Wherein: 1, upper cover; 2, base; 3, positioning rod; 41, upper cover air inlet channel; 42, hose; 43, base air inlet channel; 44, aeration structure air inlet channel; 51, gas collecting cover; 52, reinforcing rib; 53, aeration pipe; 531, supporting lug; 54, aeration head; 541, aeration hole; 542, groove; 543, positioning hole; 55, outer cover; 57, air distributor; 571, air distribution through hole; 59, containing space; 6, large cover; 7, sleeve rod. DETAILED DESCRIPTION

[0036] The utility model will be further described in detail in combination with the drawings.

[0037] Example one

[0038] As Figures 1-2The aeration structure of the membrane assembly comprises an outer cover 55, an aeration pipe 53 and a gas distributor 57. The upper end of the aeration pipe 53 penetrates the top of the outer cover 55 and is communicated with the gas distributor 57. The lower surface of the gas distributor 57 is provided with a gas distribution channel. The outlet of the gas distribution channel is provided with a gas distribution hole 571. The upper end of the gas distribution hole 571 is fixed with an aeration head 54. The aeration head 54 has a hollow body. The top of the body is closed. The side wall of the body is provided with an aeration hole 541. By setting the aeration head and the aeration hole in the side wall of the aeration head, the aeration hole is prevented from being blocked by sludge, microbial deposits and the like. At the same time, the height of the aeration hole is increased. The upper part of the membrane filament is more easily contacted with the bubbles. The cleaning effect of the upper part of the membrane filament is improved.

[0039] Preferably, the aeration hole 541 on each aeration head 54 is 2-4, uniformly distributed along the body. Preferably, there are four, which can aerate in four directions.

[0040] Preferably, the top of the body of the aeration head 54 is enlarged. It can block the sludge or pollutants and prevent the sludge or pollutants from falling and blocking the aeration hole 541.

[0041] Preferably, the outer wall of the body of the aeration head 54 is provided with a groove 542. When pouring resin between the main body of the middle assembly and the base 2, the groove can increase the firmness between the body of the aeration head 54 and the resin, preventing delamination.

[0042] Preferably, the outer edge of the bottom of the aeration head 54 is provided with a positioning hole 543. The gas distributor 57 is clamped at the positioning hole 543.

[0043] Preferably, the outer cover 55 has a top and a side wall. The bottom of the outer cover 55 is open. The outer cover 55 and the aeration pipe 53 are provided with a gas collecting cover 51 fixed to the lower surface of the top of the outer cover 55. The gap between the top of the gas collecting cover 51 and the outer cover 55. The lower part of the gas collecting cover 51 has a drain hole. The bottom of the aeration pipe 53 is communicated with the gas collecting cover 51. The drain hole is used to quickly drain the water inside the gas collecting cover 51. Otherwise, the water inside the gas collecting cover 51 can only be drained from the upper part of the gas collecting cover 51. The bottom of the aeration pipe 53 is communicated with the gas collecting cover 51.

[0044] Preferably, the outer wall of the aeration pipe 53 is fixed with a supporting lug 531 to keep the relative position between the gas collecting cover 51 and the aeration pipe 53 stable, preventing the gas collecting cover 51 and the aeration pipe 53 from being deformed or displaced due to uneven water pressure and air pressure.

[0045] Preferably, the inner wall or outer wall of the outer cover 55 is provided with a reinforcing rib 52 to increase the strength of the outer cover.

[0046] Preferably, the outer cover 55 is provided with an aeration structure air inlet channel 44. The aeration structure air inlet channel 44 penetrates the top of the outer cover 55.

[0047] Preferably, the top of the cover 55 has a receiving space 59 matching the shape of the air distributor 57 for accommodating the air distributor 57, avoiding occupying too much overall longitudinal space, and the longitudinal structure is more compact.

[0048] Preferably, the air distributor 57 is a four-part air distributor 57, and the shape and structure of the air distributor 57 can also adopt other existing forms.

[0049] Embodiment two

[0050] As Figures 3-5 is a square immersed hollow fiber membrane module including the aeration structure in embodiment one, further including a large cover 6, a middle module body and the aeration structure, the middle module body including an upper cover 1, a sleeve rod 7 and a base 2 connected as a whole, and the air distributor 57 is located between the base 2 and the cover 55 of the aeration structure.

[0051] Preferably, the sleeve rod 7 is provided with a positioning rod 3, and there is a gap between the positioning rod 3 and the sleeve rod 7, and the sleeve rod 7 can be removed from the positioning rod 3; both ends of the positioning rod 3 are provided with threads; the large cover 6 is provided with a hole for the positioning rod 3 to pass through, and the upper cover 1 and the base 2 are provided with holes for fixing the sleeve rod 7, and the cover 55 of the aeration structure is provided with a threaded hole matching the threads at the bottom of the positioning rod 3; the lower part of the positioning rod 3 passes through the large cover 6, the upper cover 1 and the base 2 in sequence and is threadedly connected with the cover 55 of the aeration structure, and the upper part of the positioning rod 3 passes through the large cover 6 and is fastened by a nut. The positioning rod 3 and / or the sleeve rod 7 are made of glass fiber reinforced plastic or stainless steel, and other materials can also be selected.

[0052] Preferably, the positioning rod 3 is 4, and when the membrane module is square column-shaped, the four positioning rods 3 are installed at the four corners of the upper cover. The number of positioning rods 3 can also be 2-3, which can also be applicable to membrane modules of other shapes except square column-shaped.

[0053] With this detachable split structure, when the membrane module body is replaced, the water in the pool does not need to be drained, only the nut at the large cover 6 is removed, and the middle module body is pulled up along the positioning rod. When replacing, only the middle module body needs to be replaced, the new middle module body is placed along the positioning rod, the four holes of the large cover 6 are passed through the positioning rod and fastened by a nut, and the new component is replaced. The new component is replaced, which is not only convenient to operate, but also greatly saves the production and manufacturing cost of the membrane shell and the replacement cost.

[0054] The split structure of the utility model is not only applicable to the immersed hollow fiber membrane module, but also applicable to other types of membrane modules according to the situation.

[0055] Preferably, the membrane assembly further comprises an air inlet channel, the air inlet channel comprising an upper cover air inlet channel 41, a hose 42, a base air inlet channel 43 and an aeration structure air inlet channel 44 connected in sequence, the upper cover air inlet channel 41 penetrating through the upper cover 1, the base air inlet channel 43 penetrating through the base 2, and the aeration structure air inlet channel 44 penetrating through the top of the outer cover 55, the aeration structure air inlet channel 44 further being connected with the elbow to guide the gas to the gas collecting cover. The hose 42 can be a smooth hose 42 or a corrugated hose. When the membrane assembly is transported or carried, the hose 42 can prevent the water inlet channel from being damaged by collision.

[0056] The air inlet channel extends from the upper cover of the membrane assembly to the aeration structure. In this way, compared with the prior art in which the air inlet channel is arranged at the bottom of the aeration structure, the unevenness of the bottom of the membrane tank does not need to be considered, uniform aeration can be achieved without leveling, the space at the bottom of the membrane assembly is reduced, it is especially suitable for use in a situation where the water level in the tank is low, and the overall structure is neat, compact and beautiful. The air is taken from the upper part, which avoids the situation that the air inlet is not uniform due to the unevenness of the tank.

[0057] The principle of the utility model is: the air inlet channel is connected with the air source outside, the gas enters the inside of the gas collecting cover 51 from the top of the gas collecting cover 51, gradually gathers and compresses, the increasing gas makes the water in the gas collecting cover 51 be discharged from the drain hole at the bottom of the gas collecting cover 51, the gas-liquid interface gradually moves downwards, until the gas enters the aeration pipe 53, then is released through the air distribution channel, the air distribution hole 571, the body of the aeration head 54 and the aeration hole 541. The gas forms a siphon phenomenon after entering the aeration pipe 53, so that the gas quickly reaches the air distributor and the aeration head, the aeration head releases large bubbles, which can flush and shake the hollow fiber membrane, so as to remove pollutants and sludge, clean the membrane and improve the anti-pollution property and operation life of the membrane assembly. The intermittent generation of large bubbles makes the membrane shake, slows down the adhesion on the surface of the hollow fiber membrane, and improves the performance and life of the membrane assembly. The occurrence of the siphon phenomenon also makes the liquid quickly flow into the gas collecting cover, so that the pulse type large bubbles can repeatedly form to scrub the membrane, the breaking of the large bubbles can cause local turbulent flow of the fluid, and shear force and disturbance force are formed on the surface of the membrane, the larger the volume of the bubbles, the greater the impact force, and the membrane can be better shaken and cleaned.

[0058] The technical content and technical features of the utility model have been disclosed above, however, it can be understood that, under the creative idea of the utility model, the person skilled in the art can make various changes and improvements on the above structure, including the combination of the technical features disclosed or claimed herein, and other combinations obviously including these features. These modifications and / or combinations all fall within the technical field involved by the utility model, and fall within the protection scope of the claims of the utility model.

Claims

1. An aeration structure of a membrane module, comprising an outer cover (55), an aeration pipe (53) and a gas distributor (57), the upper end of the aeration pipe (53) penetrating the top of the outer cover (55) and then communicating with the gas distributor (57), and the gas distributor (57) being provided with a gas distribution hole (571), characterized in that: The upper end of the gas distribution through hole (571) is fixed with an aeration head (54), the aeration head (54) has a hollow body, the top of the body is closed, and the side wall is provided with an aeration hole (541).

2. The aerator structure of a membrane module according to claim 1, wherein: The aeration hole (541) on each aeration head (54) is 2-4, which is uniformly distributed along the body.

3. The aerator structure of a membrane module according to claim 1, wherein: The top of the body of the aeration head (54) is expanded.

4. The aerator structure of a membrane module according to claim 1, wherein: The outer wall of the body of the aeration head (54) is provided with a groove (542).

5. The aerator structure of a membrane module according to claim 1, wherein: The bottom outer edge of the aeration head (54) is provided with a positioning hole (543), and the gas distributor (57) is clamped at the positioning hole (543).

6. An aerator structure for a membrane module according to any one of claims 1 to 5, wherein: The outer cover (55) has a top and a side wall, the bottom of the outer cover (55) is open, and the outer cover (55) and the aeration pipe (53) are provided with a gas collecting cover (51) fixed to the lower surface of the top of the outer cover (55), there is a gap between the top of the gas collecting cover (51) and the outer cover (55), the lower part of the gas collecting cover (51) has a drain hole, and the bottom of the aeration pipe (53) is communicated with the gas collecting cover (51).

7. The aerator structure of a membrane module according to claim 6, wherein: The outer wall of the aeration pipe (53) is fixed with a supporting ear (531); And / or the inner wall or outer wall of the outer cover (55) is provided with a reinforcing rib (52); And / or the outer cover (55) is provided with an aeration structure air inlet channel (44) penetrating through the top of the outer cover (55); And / or the top of the outer cover (55) has a containing space (59) matched with the shape of the gas distributor (57) for containing the gas distributor (57); And / or the outer cover (55) is provided with a standby hole (5) connected with an external air source.

8. Membrane module comprising an aeration structure according to any one of claims 1 to 7, characterized in that: The membrane assembly further comprises a large cover (6) and a middle component body, the large cover (6), the middle component body and the aeration structure are connected as a whole, the middle component body comprises an upper cover (1), a sleeve rod (7) and a base (2) connected as a whole, and the gas distributor (57) is located between the base (2) and the outer cover (55) of the aeration structure.

9. The membrane module of claim 8, wherein: The sleeve rod (7) is provided with a positioning rod (3) inside; there is a gap between the positioning rod (3) and the sleeve rod (7), and the sleeve rod (7) can be taken off from the positioning rod (3); the two ends of the positioning rod (3) are provided with threads; The large cover (6) is provided with a hole for the positioning rod (3) to pass through, the upper cover (1) and the base (2) are provided with holes for the sleeve rod (7) to fix, and the outer cover (55) of the aeration structure is provided with a threaded hole matched with the bottom thread of the positioning rod (3); the lower part of the positioning rod (3) passes through the large cover (6), the upper cover (1) and the base (2) in turn and is threadedly connected with the outer cover (55) of the aeration structure, and the upper part of the positioning rod (3) passes through the large cover (6) and is tightly clamped by a nut.

10. The membrane module of claim 9, wherein: The membrane assembly further comprises an air inlet channel, the air inlet channel comprises a large cover air inlet channel, an upper cover air inlet channel (41), a hose (42), a base air inlet channel (43) and an aeration structure air inlet channel (44) communicated in sequence, the large cover air inlet channel penetrates through the large cover (6), the upper cover air inlet channel (41) penetrates through the upper cover (1), the base air inlet channel (43) penetrates through the base (2), and the aeration structure air inlet channel (44) penetrates through the top of the outer cover (55).

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