Pulse aeration device and membrane module device

Abstract

The invention relates to the technical field of environment-friendly water treatment, and provides a pulse aeration device and a membrane module, the pulse aeration device comprises: a housing forming an accommodating space with an opening at the bottom, and forming an air inlet and a plurality of air outlets communicated with the accommodating space at the top; the separation structure is connected with the inner wall of the housing and is arranged in the accommodating space, an annular continuous air supply cavity is formed by a gap between the separation structure and the inner side wall of the housing, and a plurality of aeration cavities which are surrounded by the air supply cavity and are mutually spaced are defined; the plurality of aeration assemblies are respectively arranged in the plurality of aeration cavities, each aeration assembly comprises an air outlet pipe, one end of the air outlet pipe is connected with the inner top wall of the housing and is communicated with the air outlet hole, and the other end far away from the inner top wall of the housing is provided with an air inlet hole; the gas collecting hood is sleeved outside the gas outlet pipe, a gap is kept between the upper end of the gas collecting hood and the inner top wall of the housing to form a gas collecting port, and a discharge hole is formed in the bottom end of the gas collecting hood; a ventilation structure communicated with the air supply cavity is formed in a preset height position of the side wall of each aeration cavity. And air is uniformly supplied to each aeration cavity through the annular continuous air supply cavity, so that the problems in the related technology are solved.

Description

Technical Field

[0001] This disclosure relates to the field of environmental water treatment technology, and in particular to pulse aeration devices and membrane modules. Background Technology

[0002] Membrane bioreactor (MBR) technology is a novel and highly efficient wastewater treatment process that combines efficient membrane separation technology with the traditional activated sludge process. The MBR achieves efficient sludge-water separation through hollow fiber membranes. Simultaneously, due to its effective retention capacity, it can retain microorganisms with long generation cycles, achieving deep wastewater purification. Furthermore, nitrifying bacteria can proliferate fully within the system, resulting in significant nitrification and enabling advanced phosphorus and nitrogen removal.

[0003] In related technologies, MBRs can be used in conjunction with aerators to continuously flush the membrane fibers using the gas-liquid two-phase flow generated by aeration, thereby removing sludge adsorbed on the membrane fiber surface. Some related technologies use pulse aerators with multiple aeration chambers, each dispensing air separately, to clean the membrane. However, current pulse aerators cannot achieve uniform air supply between the chambers, resulting in inconsistent aeration frequencies and significant errors, which is detrimental to the membrane cleaning requirements of the membrane module. This leads to reduced membrane cleaning effectiveness, uneven cleaning of the membrane area, and consequently, different pressures on the membrane fibers at different locations. This causes some membrane fibers to bear the majority of the permeate flow, leading to uneven pressure distribution and rapid fatigue over time, resulting in decreased flux or even attenuation, ultimately affecting the filtration performance of the membrane fibers. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide a pulse aeration device and membrane module to solve the problem of poor membrane cleaning effect caused by uneven air supply between the aeration chambers of the pulse aerator in the related art.

[0005] The first aspect of this disclosure provides a pulse aeration device, comprising: a housing forming a receiving space with a bottom opening, and a top forming an air inlet and a plurality of air outlets communicating with the receiving space; a partition structure disposed in the receiving space, forming an annular continuous air supply chamber with a gap between it and the inner wall of the housing, and surrounding a plurality of mutually spaced aeration chambers; the aeration chambers and air outlets are arranged in pairs; a plurality of aeration components are respectively disposed in each of the aeration chambers and communicating with the paired aeration chambers and air outlets; each aeration component includes: an air outlet pipe, one end of which is connected to the inner top wall of the housing and communicates with the air outlets, and the other end away from the inner top wall of the housing has an air inlet; an air collecting hood, sleeved outside the air outlet pipe, with a gap between its upper end and the inner top wall of the housing to form an air collecting port, and a discharge hole at its bottom end; wherein, the partition structure forms a ventilation structure communicating with each aeration chamber at at least two predetermined height positions on opposite sides.

[0006] In an embodiment of the first aspect, the ventilation structure includes: at least one ventilation opening formed at the bottom end of the partition structure; at least one air supply hole unit formed on the wall of the partition structure; the air supply hole unit is positioned higher than the ventilation opening.

[0007] In an embodiment of the first aspect, at least one pair of ventilation openings are provided between a pair of opposite sidewalls of each aeration chamber; and / or, there are at least two ventilation openings, which are symmetrically distributed on a pair of opposite chamber walls adjacent to the air supply chamber relative to the central axis of the aeration chamber.

[0008] In an embodiment of the first aspect, the air supply hole unit has at least two holes, which are symmetrically distributed on a pair of opposing cavity walls adjacent to the air supply cavity relative to the central axis of the aeration cavity; and / or, at least one air supply hole included in the air supply hole unit has a variable diameter section with an increasing cross-sectional area from the air supply cavity to the aeration cavity.

[0009] In the first aspect of the embodiment, the vent pipe is a pipe with a straight central axis that is coaxial with the vent hole, and the vent hood is a hood with a straight central axis that is coaxial with or eccentrically positioned with the vent pipe.

[0010] In an embodiment of the first aspect, the partition structure includes: a set of first partition members connected to the inner wall of the cover and spaced apart according to the arrangement of the aeration chambers to separate the aeration chambers, and forming an annular continuous gap with the inner peripheral sidewall of the cover; a set of second partition members that surround and cooperate with the set of first partition members to form each of the aeration chambers on the side away from the gap, and to form the air supply chamber on the side facing the gap; the second partition members are provided with the ventilation structure.

[0011] In an embodiment of the first aspect, one end of the first separator is connected to the inner top wall of the housing and two adjacent inner side walls of the housing, and a notch is formed on the opposite side of the end away from the top of the housing to form an edge portion that maintains the gap between the edge portion and the adjacent inner side walls of the housing. The edge portion is fixedly connected to the second separator. The edge portion and the second separator have a curved shape extending from the gap position to the adjacent inner side walls of the housing to define the air supply chamber and the aeration chamber on both sides of the second separator.

[0012] In an embodiment of the first aspect, the edge and the second partition connected thereto extend obliquely upward to the inner wall of the housing.

[0013] In the first aspect of the embodiment, the first partition and the second partition are engaged in a snap-fit ​​configuration.

[0014] In the first aspect of the embodiment, the first partition and the second partition are engaged by a strip and a groove, the strip protruding from the groove toward the bottom of the cover to form a hot melt weld point for hot melt welding to fix the first partition and the second partition.

[0015] In an embodiment of the first aspect, a flow baffle is provided in the flow channel connecting the air inlet to the air supply chamber.

[0016] In an embodiment of the first aspect, the surface of the gas collection hood is provided with at least a pair of extension feet, and the extension feet are fixedly connected to the inner wall of the hood by a fastening structure.

[0017] In an embodiment of the first aspect, the locking structure includes: a locking groove, disposed along the vertical direction; and a locking member, which engages and is fixed to the locking groove; wherein, one of the locking groove and the locking member is located on the extension foot, and the other is located on the inner top wall or inner side wall of the cover.

[0018] In the first aspect of the embodiment, the cross-section of the snap-fit ​​groove and the snap-fit ​​member is a broken line structure, a curved structure, or a broken line connected to a curved structure; and / or, the snap-fit ​​member and the snap-fit ​​groove are heat-fused together.

[0019] The first aspect of this disclosure provides a membrane module, characterized in that it includes: a pulse aeration device as described in any one of the second aspects and a filter membrane located above the pulse aeration device.

[0020] As described above, this disclosure relates to the field of environmental water treatment technology, providing a pulse aeration device and membrane module. The device includes: a housing forming a receiving space with a bottom opening, and a top forming an air inlet and multiple air outlets communicating with the receiving space; a partition structure connected to the inner wall of the housing and disposed in the receiving space, with a gap between the partition structure and the inner sidewall of the housing forming a continuous annular air supply chamber, and surrounding multiple mutually spaced aeration chambers; multiple aeration components, respectively disposed in the multiple aeration chambers, including: an air outlet pipe, one end connected to the inner top wall of the housing and communicating with the air outlet, and the other end away from the inner top wall of the housing having an air inlet; a gas collecting hood, sleeved outside the air outlet pipe, with a gap between its upper end and the inner top wall of the housing to form a gas collecting port, and a discharge hole at its bottom end; wherein, a predetermined height position of the sidewall of each aeration chamber forms a ventilation structure for communicating with the air supply chamber. The continuous annular air supply chamber uniformly supplies air to each aeration chamber, thereby solving the problems in related technologies. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of the pulse aeration device in an embodiment of this disclosure is shown.

[0022] Figure 2 A three-dimensional structural diagram showing the separation of the pulse aeration device cover and the gas diversion component in an embodiment of this disclosure is provided.

[0023] Figure 3 This diagram illustrates a three-dimensional structure of the pulse aeration device hood from an inverted perspective, as shown in an embodiment of this disclosure.

[0024] Figure 4 This is a three-dimensional structural diagram of the pulse aeration device hood from another inverted perspective in an embodiment of this disclosure.

[0025] Figure 5 The diagram shown is a top view of the pulse aeration device in an embodiment of this disclosure.

[0026] Figure 6 exhibit Figure 5 A schematic diagram of the cross-sectional view along the EE direction.

[0027] Figure 7 A side view of the pulse aeration device in an embodiment of this disclosure is shown.

[0028] Figure 8 exhibit Figure 7 A cross-sectional schematic diagram of the pulse aeration device along the FF direction.

[0029] Figure 9 This diagram illustrates the exploded structure of the partition structure in an embodiment of the present disclosure.

[0030] Figure 10 A side view of the second separator in an embodiment of this disclosure is shown.

[0031] Figure 11 It shows Figure 2 A magnified view of the structure of part H in the middle.

[0032] Figure 12 A schematic diagram showing the structure of the gas collection hood being detached from the housing in an embodiment of this disclosure.

[0033] Figure 13 exhibit Figure 7 A schematic diagram of the cross-sectional structure along the GG direction. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can be modified or changed according to different viewpoints and application modules without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0035] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0036] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0037] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0038] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0039] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0040] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, module, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0041] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0042] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0043] In current pulse aerators with multiple aeration chambers, the uniform air supply between chambers cannot be achieved, resulting in inconsistent aeration frequencies and significant errors, which is detrimental to the membrane cleaning requirements of membrane modules. This leads to reduced membrane cleaning efficiency, uneven cleaning of the membrane area, and consequently, different pressures on the membrane fibers at different locations. Consequently, some localized membrane fibers may bear the majority of the permeate flow, failing to fully utilize the membrane's filtration capacity.

[0044] In view of this, the present disclosure provides a pulse aeration device, which solves the problems in the related art by designing a structure that uniformly supplies air to the aeration chamber through the air supply chamber.

[0045] Please refer to the following: Figures 1 to 4 . Figure 1 A three-dimensional structural schematic diagram of the pulse aeration device in an embodiment of this disclosure is shown. Figure 2 A three-dimensional structural diagram showing the separation of the pulse aeration device cover and the gas diversion component in an embodiment of this disclosure is provided. Figure 3 This diagram illustrates a three-dimensional structure of the pulse aeration device hood from an inverted perspective, as shown in an embodiment of this disclosure. Figure 4 This is a three-dimensional structural diagram of the pulse aeration device hood from another inverted perspective in an embodiment of this disclosure.

[0046] The pulse aeration device 100 includes a cover 110, a partition structure 120, and an aeration component 130.

[0047] The cover 110 forms a receiving space 1100 with a bottom opening 1101. As an example, the cover 110 includes a top wall and peripheral sidewalls adjoining the edge of the top wall, with no bottom wall forming the opening 1101. The cover 110 is exemplary implemented as a cuboid, having a length direction (X direction) and a width direction (Y direction). The shape of the cover 110 can also vary depending on the layout of the aeration chamber 1103. The top of the cover 110 forms an air inlet 111 communicating with the receiving space 1100 and a plurality of air outlets 112. In some embodiments, the air inlet 111 is located at one end along the length direction of the cover 110. The air inlet 111 can be connected to an air source to allow air to enter the cover 110. In some embodiments, the plurality of air outlets 112 can be linearly spaced along one extending direction of the cover 110.

[0048] Optionally, in Figure 1 and Figure 2 In this system, each vent 112 is connected to a gas diversion component 140. The gas diversion component 140 is fixedly mounted on the outer top wall of the housing 110. The gas diversion component 140 has a central cavity communicating with the vent 112, and diversion ports extending laterally and evenly around the central cavity. Large air bubbles discharged from the vent 112 are broken into multiple smaller air bubbles by the gas diversion component 140 and output through the diversion ports. These smaller air bubbles can uniformly scrub the membrane module within its coverage area and also agitate the nearby water, achieving the agitation effect of a sludge mixing pump.

[0049] Please see Figure 3 and Figure 4The pulse aeration device 100 includes a partition structure 120 disposed in the receiving space 1100, forming an annular continuous air supply chamber 1102 between the partition structure 120 and the inner wall of the housing 110, and surrounding a plurality of mutually spaced aeration chambers 1103. The partition structure 120 forms ventilation structures 160 at at least two opposite sides at predetermined height positions, connecting the air supply chamber 1102 and each aeration chamber 1103. That is, through the annular continuous air supply chamber 1102 surrounding the plurality of aeration chambers 1103, communication between the aeration chamber 1103 and the air supply chamber 1102 is formed at least on both sides of each aeration chamber 1103, allowing the air supply chamber 1102 to uniformly supply air to each aeration chamber 1103. Preferably, the air inlet 111 can also be connected to an air storage tank (not shown) at the far end of the air source. The air storage tank can store or supply air according to the internal and external pressure difference, which also helps to balance the air distribution between each aeration chamber 1103, thereby helping to improve the uniformity of air volume between each aeration chamber 1103. This ensures that the air volume in each aeration chamber 1103 changes uniformly during pulse aeration, and the aeration frequency can also remain consistent. As a result, the wiping of different parts of the membrane fibers is also very uniform, effectively avoiding the problem of flux reduction or even attenuation caused by different cleanliness of membrane fibers in different parts.

[0050] The aeration chamber 1103 and the air outlet 112 (see...) Figure 2 (Set in pairs) Figure 2 The example shows four air vents 112. Figure 4 The image shows an aeration chamber 1103 corresponding to each air outlet 112. Each aeration chamber 1103 is equipped with an aeration component 130, which connects to the corresponding air outlet 112. Optionally, the plurality of air outlets 112 can be arranged at equal intervals. Each aeration chamber 1103 can be coaxially arranged with the corresponding air outlet 112. The plurality of aeration chambers 1103 have the same dimensions, thus having the same capacity for uniform air output.

[0051] See also Figure 3 and Figure 4 The ventilation structure 160 may include at least one ventilation opening 162 formed at the bottom end of the partition structure 120, and at least one air supply hole unit 161 formed on the wall surface of the partition structure 120. As an example, the air supply hole unit 161 may be positioned above the ventilation opening 162.

[0052] As an example, the cavity wall of each aeration chamber 1103 (i.e., the portion of the aeration chamber 1103 enclosed by the partition structure 120) can be provided with multiple ventilation openings 162, for example... Figure 3 and Figure 4The four ventilation openings 162 shown are evenly distributed in pairs on a pair of opposing cavity walls of the aeration chamber 1103, cooperating with the annular continuous air supply chamber 1102 to uniformly introduce air into each aeration chamber 1103. Optionally, the four ventilation openings 162 can be arranged symmetrically around the central axis of the corresponding aeration chamber 1103. It is understood that in other embodiments, the number of ventilation openings 162 can vary; for example, a pair of ventilation openings 162 may be symmetrically distributed relative to the central axis of the aeration chamber 1103 on a pair of opposing cavity walls adjacent to the air supply chamber 1102. For example, in Figure 4 In this configuration, a pair of ventilation openings 162 can be arranged radially along the center of the aeration chamber 1103 on the pair of chamber walls, such as at positions A and B on the pair of chamber walls along the width direction perpendicular to the cover 110. Alternatively, they can be staggered in the width direction, such as at positions C and D on the pair of chamber walls at an angle.

[0053] In some embodiments, at least two air supply hole units 161 are symmetrically distributed on a pair of opposing cavity walls adjacent to the air supply cavity 1102 of the aeration cavity 1103, relative to the central axis of the aeration cavity 1103. Figure 3 and Figure 4 The diagram shows that there is a pair of air supply hole units 161, which are staggered in the width direction and symmetrically arranged on the walls of the pair of chambers relative to the central axis of the aeration chamber 1103, so as to cooperate with the annular continuous air supply chamber 1102 to uniformly ventilate each aeration chamber 1103.

[0054] The air supply unit 161 may include at least one air supply hole 1611, and two air supply holes 1611 are shown in the figure. The size and number of air supply holes 1611 in each air supply unit 161 are related to the air supply volume from the air supply chamber 1102 to the aeration chamber 1103. Since the pulse aeration device 100 is placed in the wastewater to be treated, if the air supply holes 1611 are too small, they are easily blocked by sludge; if the air supply holes 1611 are too large or there are too many, it can cause gas fluctuations. Therefore, the appropriate size and number of air supply holes 1611 can be selected according to the required air supply effect.

[0055] In other embodiments, the number of air supply port units 161 and the number of air supply ports 1611 included can also vary. In one example, there may be four air supply port units 161, located one-to-one in... Figure 2 and Figure 4 Above each vent opening 162, each air supply unit 161 may include only one air supply port 1611, which is consistent with... Figure 2 and Figure 4In the embodiment, four ventilation openings 162 are used in conjunction with four air supply holes 1611 for ventilation. The ventilation volume is similar, but the structure can be different, and the uniformity may be better.

[0056] Optionally, in Figure 11 The diagram shows that the air supply hole 1611 in the air supply hole unit 161 may have a variable diameter section 16111 with an increasing cross-sectional area from the air supply chamber 1102 to the aeration chamber 1103. As an example, the end of the air supply hole 1611 facing the aeration chamber 1103 may be made into a chamfered structure to form the variable diameter section 16111. Since the air pressure in the air supply hole unit 161 is relatively low, it is not easy to wash away the accumulated material in the hole. Therefore, when the water / air flow flows from the air supply chamber 1102 to the aeration chamber 1103, it can obtain a larger movement space through the variable diameter section 16111 after passing through the air supply hole 1611. This can effectively prevent the accumulation of debris in the air supply hole 1611, such as effectively preventing fibrous debris or even aquatic parasites (such as red nematodes) from getting stuck in the air supply hole 1611, thereby improving the reliability of the aeration device.

[0057] In addition, the ventilation structure 160 includes a higher-positioned air supply hole unit 161 and a lower-positioned ventilation opening 162. According to the aeration principle of the pulse aeration device, gas introduced into the air inlet 111 flows downwards into the air supply chamber 1102, lowering the water level in the air supply chamber 1102 so that the gas first connects to the higher-positioned air supply hole unit 161. Therefore, the ventilation unit is preferentially used to supply air from the air supply chamber 1102 to the aeration chamber 1103. When the air supply hole unit 161 is blocked and cannot supply air, the water level can be further lowered to connect the gas and the ventilation opening 162, still allowing air supply from the air supply chamber 1102 to the aeration chamber 1103. That is to say, the ventilation opening 162 serves as a backup for the air supply hole unit 161 to supply air from the air supply chamber 1102 to the aeration chamber 1103, achieving a "main-backup" redundant air supply design, which can effectively improve the reliability of the pulse aeration device 100.

[0058] It should be noted that, since each aeration chamber 1103 is equipped with a corresponding ventilation structure 160, therefore Figure 3 and Figure 4 Only some parts are marked, not all of them. In other embodiments, the plurality of air outlets 112 and aeration chambers 1103 may not be arranged in a straight line, but may be arranged in an array such as a square, ring, or circle, and are not limited to the structure in this embodiment.

[0059] like Figure 4 As shown, multiple aeration components 130 are respectively disposed in each of the aeration chambers 1103, for connecting the paired aeration chambers 1103 and the air outlets 112. For example... Figure 5 and Figure 6The structure of the aeration component 130 is described in detail below. Figure 5 The diagram shown is a top view of the pulse aeration device 100 in an embodiment of this disclosure. Figure 6 exhibit Figure 5 A schematic diagram of the cross-sectional view along the EE direction.

[0060] like Figure 6 As shown, the aeration assembly 130 includes an air outlet pipe 131 and an air collection hood 132. One end of the air outlet pipe 131 is connected to the inner top wall of the cover 110 and communicates with the air outlet 112, while the other end, away from the inner top wall of the cover 110, has an air inlet 1311. The air collection hood 132 is fitted upwards around the air outlet pipe 131, with a gap between its upper end and the inner top wall of the cover 110, forming an air collection port 1321, and a discharge port 1322 at its bottom end. The discharge port 1322 is used to allow sludge sedimentation in the air collection chamber 1323 of the air collection hood 132 to be discharged from the discharge port 1322 into the aeration chamber 1103.

[0061] Referring to the airflow arrows in the diagram, the working principle of the pulse aeration device 100 is explained. Gas is introduced through the air inlet 111 and flows downwards into the air supply chamber 1102. As the gas enters and rises in the air supply chamber 1102, it forces water out from the bottom of the cover 110, thus lowering the water level in the air supply chamber 1102. When the water level drops to expose the air supply hole unit 161, the air supply chamber 1102 connects to the aeration chamber 1103 through the air venting unit to supply air to the aeration chamber 1103. Similarly, as gas is continuously introduced into the aeration chamber 1103, the water level in the aeration chamber 1103 decreases. Since the gas collection hood 132 is connected to the aeration chamber 1103 through the gas collection port 1321, the water level also decreases until the water level drops to expose the air inlet 1311 at the bottom of the gas collection hood 132. The gas can enter the gas collection hood 132 through the gas collection port 1321 and enter the air outlet pipe 131 through the air inlet 1311 to be sent out through the air outlet 112, so that it can be diverted and output by the gas diverter 140 to form aeration. After aeration is formed, the sewage in the aeration chamber 1103 rises and refills the aeration chamber 1103. Subsequently, by continuously filling the gas collection chamber 1323 of the gas collection hood 132 with air, the pulse aeration device 100 will continuously repeat the above aeration process. Thus, the pulse aeration device 100 will form an intermittent aeration. To facilitate the sewage being pushed out of the air supply chamber 1102 and the aeration chamber 1103, it can be as follows: Figure 4 As shown in the figure, the cover 110 may also be provided with overflow grooves 1104 for water to overflow at the bottom of the two inner side walls.

[0062] exist Figure 6In this process, the vent pipe 131 can be integrally formed with the cover 110, or the vent pipe 131 can be fixedly connected to the inner top wall of the cover 110 by means of snap-fit, heat fusion or other methods.

[0063] like Figure 6 As can be seen, the air outlet pipe 131 is a pipe with a straight central axis that is coaxial with the air outlet 112, and the air collection hood 132 is a hood that is coaxial with the air outlet pipe 131 and extends in a straight line.

[0064] Alternatively, in other optional embodiments, the gas collecting hood 132 and the gas outlet pipe 131 may be eccentrically positioned along one extension direction of the housing 110, i.e., their central axes are not collinear. Alternatively, the gas outlet pipe 131 and the gas outlet hole 112 may be eccentrically positioned along the width direction of the housing 110. Alternatively, the gas outlet pipe 131 and the gas outlet hole 112 may be eccentrically positioned along both the length and width directions of the housing 110. The gas outlet pipe 131 is more conducive to breaking the instantaneous balance of pulse aeration, making pulse aeration easier to occur and more uniform, unaffected by environmental factors.

[0065] For example Figure 4 and Figure 6As shown, optionally, a baffle 150 may be provided in the flow channel connecting the air inlet 111 of the cover 110 to the air supply chamber 1102. When gas flows into the air inlet 111, the flow velocity may be too fast and it may directly rush out of the air supply chamber 1102. Furthermore, the downward rush of gas may also create turbulence, affecting the uniformity of air supply to the aeration chamber 1103 and potentially causing local disturbances. The baffle 150 can mitigate the impact force of the gas rushing down, so that the gas impacting the baffle 150 is blocked and slowed down before flowing into the side air supply chamber 1102, allowing the gas to supply the air supply chamber 1102 smoothly, effectively balancing and stabilizing the supply / aeration of the pulse aeration device 100. As an example, the flow channel may be vertical, in which case the baffle 150 may be located below the air inlet 111, either directly below or offset from directly below. Alternatively, in other embodiments, the flow channel may be of other shapes or segments, and is not limited thereto. For example, the baffle 150 may be a planar, polygonal, or arc-shaped baffle, etc. For example, the baffle 150 may be integrally connected to the housing 110. Further optionally, the baffle 150 may be integrally connected to the sidewall of the housing 110 adjacent to the air inlet 111 (for example, one end sidewall of the housing 110 in one extending direction). To enhance the strength of the baffle 150, its opposite ends may be respectively connected to the end sidewall and a first separator 121 adjacent to the end sidewall, while the other two ends of the baffle 150 maintain a distance from the corresponding inner sidewall of the housing 110 to allow gas to enter the air supply chamber 1102.

[0066] Please see Figure 4 , Figure 7 , Figure 8 and Figure 9 The diagram illustrates an embodiment of the partition structure 120. Figure 7 A side view of the pulse aeration device in an embodiment of this disclosure is shown. Figure 8 exhibit Figure 7 A cross-sectional schematic diagram of the pulse aeration device along the FF direction. Figure 9 A schematic diagram showing the exploded structure of the partitioned structure.

[0067] The partition structure 120 includes a set of first partitions 121 and a set of second partitions 122. The first partitions 121 and the second partitions 122 can be overlapped to separate the aeration chamber 1103 and the air supply chamber 1102, which is simple to assemble, highly efficient, and reliable.

[0068] The set of first separators 121 are connected to the inner wall of the cover 110 and are spaced apart according to the arrangement of the aeration chambers 1103 to separate the aeration chambers 1103, forming a continuous annular gap with the inner peripheral sidewall of the cover 110. In the example shown above, the first separators 121 can be arranged parallel to each other along the length of the cover 110 to form a linear arrangement of aeration chambers 1103. Of course, in other embodiments, the arrangement can be varied depending on the number and arrangement of the aeration chambers 1103.

[0069] from Figure 4 and Figure 9 As can be seen, the portion of the edge of the first separator 121 near the top of the cover 110 forms a continuous, sealed connection with the inner top wall and the inner side walls of the cover 110, respectively. This prevents air / water exchange between the air supply chamber 1102 and the aeration chamber 1103 (and between the aeration chamber 1103) at the continuous, sealed connection, thus limiting the gas transport between the air supply chamber 1102 and the aeration chamber 1103 via the ventilation structure 160. In a set of first separators 121, the first and last two separators 121 in the arrangement direction form gaps with the inner side walls of the corresponding two covers 110, while the opposite side edges 1211 of the first separator 121 at the end away from the top wall of the cover 110 also form gaps with the inner side walls of the other two covers 110, thereby creating a continuous annular gap, as... Figure 4 As shown, after connecting a set of the second separators 122, the annular continuous air supply chamber 1102 can be formed in the annular continuous gap.

[0070] Optionally, the first partition 121 may be provided with a reinforcing structure, such as one or more reinforcing ribs 1212 connecting the first partition 121 and the inner top wall / inner side wall of the cover 110.

[0071] The set of second separators 122, in conjunction with the set of first separators 121, surrounds each of the aeration chambers 1103 on the side opposite to the gap (i.e., the inner side). Figure 4 and Figure 9In [the figure], the first partition members 121 are arranged at intervals along a straight line. Open sides will be formed on the opposite sides of the arrangement direction between them. Then, there may be two second partition members 122, which are respectively fixedly connected to the edge portions 1211 of the first partition members 121 on the same side at both sides to form an enclosure to fill the open sides, thereby enclosing each of the aeration chambers 1103. It can be understood that in other examples, since the arrangement mode of the first partition members 121 changes based on the required arrangement mode of the aeration chambers 1103, the number, size of each second partition member 122, and the number of the first partition members 121 connected thereto may all change. For example, for several aeration chambers 1103 in a "field" - shaped layout, the "cross" in the middle can be formed by the first partition members 121, and the "outer rectangle" can be formed by the second partition members 122. Therefore, the embodiment of the partition structure 120 shown in the present disclosure is only an example and is not limited thereto. And, the group of second partition members 122 can define the annular continuous air supply chamber 1102 on the side facing the gap (i.e., the outer side). Thus, the structure of multiple aeration chambers 1103 of the pulse aeration device 100 and the air supply chamber 1102 surrounding the aeration chambers 1103 is formed. The second partition member 122 can be provided with the ventilation structure 160 to connect the air supply chamber 1102 and each aeration chamber 1103.

[0072] As Figure 9 shown, the edge portion 1211 of the first partition member 121 at the end far from the top of the housing 110 is formed by concave depressions on the opposite sides at this end, and a gap is maintained between it and the inner side wall of the adjacent housing 110. The contour of the edge portion 1211 is exemplified as a curved shape, such as a broken line, a curve, or a shape formed by connecting a straight line and a curve. In the figure, it is exemplified as a broken - line shape. The edge portion 1211 bends upward from the gap position where it maintains a gap with the inner side wall of the adjacent housing 110 and extends to abut against the inner side wall of the adjacent housing 110. The second partition member 122 can be engaged with the edge portion 1211 in a shape - matching manner to as Figure 8The spacer divides the space into an air supply chamber 1102 and an aeration chamber 1103 located on opposite sides. The advantage of this design is that the volume ratio between the aeration chamber 1103 and the air supply chamber 1102 can be adjusted. Specifically, if the first separator 121 is designed to be completely separated from the inner wall of the adjacent housing 110, the volume of the gap increases, meaning the volume of the air supply chamber 1102 increases while the volume of the aeration chamber 1103 decreases. Because the ventilation structure 160 is relatively low, a large portion of the upper volume of the air supply chamber 1102 becomes unusable, instead encroaching on and sacrificing the volume of the aeration chamber 1103, thus resulting in a lower aeration intensity for an aeration device of the same size. By designing the curved edge 1211 of the first separator 121 and the cooperating second separator 122, the space above the portion of the second separator 122 that bends to the inner wall of the adjacent housing 110 becomes the volume of the aeration chamber 1103. With the same volume of pulse aeration device 100, the volume of the aeration chamber 1103 can be effectively increased, thereby increasing the aeration intensity. It is understood that different volume ratios of the aeration chamber 1103 and the air supply chamber 1102 can be obtained based on the different degrees of curvature of the edge 1211 and the second separator 122.

[0073] Please refer to them together. Figure 9 and Figure 10 , Figure 10 The diagram shows a side view of the second separator in an embodiment of this disclosure.

[0074] As can be seen, the edge 1211 and the second partition 122 connected thereto extend upwardly at an angle to the inner wall of the housing 110. In other embodiments, the edge 1211 and the second partition 122 connected thereto may also be a right-angled curved structure, and are not limited thereto.

[0075] exist Figure 9 In this configuration, the first partition 121 and the second partition 122 can be engaged with each other. The first partition 121 and the second partition 122 can also be engaged with each other via a strip and a groove 1221, meaning the strip can be inserted into the groove 1221. Optionally, the strip and the groove 1221 can be interference-fitted for mutual locking and positioning. For example, the strip is formed on the edge 1211 of the first partition 121, and the groove 1221 is formed on the second partition 122. Alternatively, in other embodiments, the objects on which the strip and the groove 1221 are located can be interchanged, and this is not a limitation.

[0076] In addition, Figure 2 It shows Figure 9 The state after the first separator 121 and the second separator 122 are engaged. Figure 11 It shows Figure 2 A magnified view of the structure of part H in the middle. From Figure 11 As can be seen, a portion of the insert protrudes from the groove 1221 towards the bottom of the cover 110. Since the first separator 121 and the second separator 122 can be made of a thermoplastic material, the protruding portion of the insert can serve as a thermoplastic weld point 12111, which is melted away by thermoplastic welding to fix the first separator 121 and the second separator 122 at a single point. Utilizing the protruding portion of the thermoplastic material after interlocking as a weld point for thermoplastic welding to form a fixed connection eliminates the need for metal screws, reduces the risk of sewage corrosion, and provides a more robust thermoplastic fixation, effectively extending the lifespan of the pulse aeration device.

[0077] For example Figure 12 and Figure 13 The diagram illustrates the mounting structure of the gas collection hood 132. Figure 12 This is a schematic diagram showing the structure of the gas collection hood 132 being detached from the housing 110 in an embodiment of this disclosure. Figure 13 exhibit Figure 7 Schematic diagram of the cross-sectional structure along the GG direction.

[0078] like Figure 12 As shown, the surface of the gas collecting hood 132 may be provided with at least a pair of extension legs 1324, and the extension legs 1324 are fixedly connected to the inner wall of the housing 110 by a locking structure. The locking structure includes a locking groove 1103 and a locking member 13241. The locking member 13241 may be provided on the extension leg 1324, and may be located at the end of the extension leg 1324. The locking groove 1103 may be provided on the inner wall of the housing 110, for example, on the inner top wall or inner side wall of the housing 110 and extend in the vertical direction. The locking member 13241 and the locking groove 1103 are shaped to fit together, so as to define the position of the gas collecting hood 132 in the lateral direction. To facilitate viewing the combined state of the locking member 1241 and the locking groove 1103, Figure 13 The cap at the top of the snap-fit ​​component 13241 is made transparent. As an example, the cross-section of the snap-fit ​​groove 1103 and the snap-fit ​​component 13241 has a broken line structure, a curved structure, or a broken line connected to a curved structure. For example, T-shaped, Y-shaped, dovetail-shaped, etc. Furthermore, the air collection hood 132 can be fixed by fixing the snap-fit ​​component 13241 and the snap-fit ​​groove 1103. As an example, the snap-fit ​​component 13241 and the snap-fit ​​groove 1103 can be made of a heat-fusible material. The portion of the snap-fit ​​component 13241 exposed in the snap-fit ​​groove 1103 forms a fixing point for heat fusion welding, and the air collection hood 132 can be fixed by heat fusion welding. The advantage is that the air collection hood does not need to be fixed with metal screws, avoiding metal corrosion problems of the pulse aeration device 100 in various wastewater applications, and the heat fusion fixation is more secure, greatly improving the service life of the pulse aeration device 100.

[0079] In some embodiments, a pair of extension legs 1324 may be arranged back-to-back to connect to opposite positions on the inner wall of the housing 110. In some embodiments, the number of extension legs 1324 may also be more than two or more pairs, and is not limited to this embodiment.

[0080] In some embodiments, the cover 110, the air outlet pipe 131 which can be integrally connected to the cover 110, the first partition 121, the second partition 122, and the air collection cover 132, etc., can all be made of thermoplastic materials. This allows for the convenient use of thermoplastic welding to fix these parts, eliminating the need for screws or other metal parts, reducing the risk of corrosion by sewage, and also improving the reliability between parts and reducing the internal vibration of the pulse aeration device 100 underwater.

[0081] After repeated verification and testing by the applicant, the pulse aeration device 100 in this embodiment, which employs a ring-shaped continuous air supply chamber 1102 surrounding each aeration chamber 1103, achieves optimal air supply and effectively ensures the consistency of the air volume of each aeration chamber 1103 at the same time, thereby ensuring that the aeration frequency error of each aeration chamber 1103 is within 5%, effectively improving the shortcomings of pulse aerators in related technologies.

[0082] In another embodiment of this disclosure, a membrane module may also be provided. The membrane module includes a pulse aeration device 100 as described in any of the previous embodiments, and a filter membrane located above the pulse aeration device 100. The pulse aerator performs a scrubbing and cleaning action on the filter membrane during aeration. The membrane module using the pulse aeration device 100 in this embodiment reduces energy consumption by more than 50% compared to conventional perforated tube aeration.

[0083] In summary, this disclosure relates to the field of environmental water treatment technology, providing a pulse aeration device and membrane module. The device includes: a housing forming a receiving space with a bottom opening, and a top forming an air inlet and multiple air outlets communicating with the receiving space; a partition structure connected to the inner wall of the housing and disposed in the receiving space, with a gap between the partition structure and the inner sidewall of the housing forming a continuous annular air supply chamber, and surrounding multiple mutually spaced aeration chambers; multiple aeration components, respectively disposed in the multiple aeration chambers, including: an air outlet pipe, one end connected to the inner top wall of the housing and communicating with the air outlet, and the other end away from the inner top wall of the housing having an air inlet; a gas collecting hood, sleeved outside the air outlet pipe, with a gap between its upper end and the inner top wall of the housing to form a gas collecting port, and a discharge hole at its bottom end; wherein, a predetermined height position of the sidewall of each aeration chamber forms a ventilation structure for communicating with the air supply chamber. The continuous annular air supply chamber uniformly supplies air to each aeration chamber, thereby solving the problems in related technologies.

[0084] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A pulse aeration device, characterized in that, include: The cover forms a receiving space with an opening at the bottom, and an air inlet and multiple air outlets at the top that connect to the receiving space; A partition structure is provided in the accommodating space, and the gap between it and the inner wall of the cover forms a continuous annular air supply chamber, which surrounds a plurality of mutually spaced aeration chambers. The aeration chamber and the air outlet are arranged in pairs; Multiple aeration components are respectively disposed in each of the aeration chambers and connected to the paired aeration chambers and air outlets; The aeration assembly includes: an air outlet pipe, one end of which is connected to the inner top wall of the housing and communicates with the air outlet hole, and the other end away from the inner top wall of the housing has an air inlet hole; an air collection hood, which is sleeved outside the air outlet pipe, with a gap between its upper end and the inner top wall of the housing to form an air collection port, and a discharge hole at its bottom end; wherein, the partition structure forms a ventilation structure connecting the air supply chamber and each aeration chamber at at least two preset height positions on opposite sides.

2. The pulse aeration device according to claim 1, characterized in that, The ventilation structure includes: at least one ventilation opening formed at the bottom end of the partition structure; at least one air supply hole unit formed on the wall of the partition structure; the air supply hole unit is positioned higher than the ventilation opening.

3. The pulse aeration device according to claim 2, characterized in that, Each aeration chamber has at least one pair of ventilation openings between its opposite sidewalls; and / or, there are at least two ventilation openings, which are symmetrically distributed on a pair of opposite chamber walls adjacent to the air supply chamber relative to the central axis of the aeration chamber.

4. The pulse aeration device according to claim 2, characterized in that, The air supply hole unit has at least two holes, which are symmetrically distributed on a pair of opposing cavity walls adjacent to the air supply cavity relative to the central axis of the aeration cavity; and / or, at least one air supply hole included in the air supply hole unit has a variable diameter section with an increasing cross-sectional area from the air supply cavity to the aeration cavity.

5. The pulse aeration device according to claim 1, characterized in that, The vent pipe is a tube with a straight central axis that is coaxial with the vent hole, and the vent hood is a hood with a straight central axis that is coaxial with or eccentrically positioned with the vent pipe.

6. The pulse aeration device according to claim 1, characterized in that, The partition structure includes: A set of first separators is connected to the inner wall of the cover and is spaced apart according to the arrangement of the aeration chambers to separate the aeration chambers, and forms a continuous annular gap with the inner peripheral side wall of the cover. A set of second partitions, which are connected and cooperate with the set of first partitions, to form each of the aeration chambers on the side away from the gap and to form the air supply chamber on the side facing the gap; the second partitions are provided with the ventilation structure.

7. The pulse aeration device according to claim 6, characterized in that, One end of the first separator is connected to the inner top wall of the cover and the inner side walls of two adjacent covers respectively, and a notch is formed on the opposite side of the end away from the top of the cover to maintain the gap between it and the adjacent inner side walls of the cover. The edge is fixedly connected to the second separator. The edge and the second separator have a curved shape extending from the gap position to the adjacent inner side walls of the cover to define the air supply chamber and the aeration chamber on both sides of the second separator.

8. The pulse aeration device according to claim 7, characterized in that, The edge and the second partition connected thereto extend upward at an angle to the inner wall of the housing.

9. The pulse aeration device according to claim 6, characterized in that, The first separator and the second separator are engaged in a snap-fit ​​configuration.

10. The pulse aeration device according to claim 9, characterized in that, The first and second partitions are engaged by insert strips and grooves, with the insert strips protruding from the grooves toward the bottom of the cover to form a hot melt weld point for fixing the first and second partitions by heat fusion welding.

11. The pulse aeration device according to claim 1, characterized in that, A flow baffle is provided in the flow channel connecting the air inlet to the air supply chamber.

12. The pulse aeration device according to claim 1, characterized in that, The surface of the gas collection hood is provided with at least one pair of extension feet, and the extension feet are fixedly connected to the inner wall of the hood by a fastening structure.

13. The pulse aeration device according to claim 12, characterized in that, The locking structure includes: The snap-fit ​​slot is positioned along the vertical direction. A snap-fit ​​component is snapped into and fixed to the snap-fit ​​groove; The snap-fit ​​groove and the snap-fit ​​element are located on the extension foot and the other is located on the inner top wall or inner side wall of the cover.

14. The pulse aeration device according to claim 13, characterized in that, The cross-section of the snap-fit ​​groove and the snap-fit ​​component is a broken line structure, a curved structure, or a broken line connected to a curved structure; and / or, the snap-fit ​​component and the snap-fit ​​groove are fixed by heat fusion.

15. A membrane module, characterized in that, include: The pulse aeration device and the filter membrane located above the pulse aeration device as described in any one of claims 1 to 14.

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