Aeration device and aeration method

Abstract

The invention discloses an aeration device and an aeration method, and relates to the field of sewage aeration, and the aeration device comprises an aeration main body. Wherein the aeration main body is provided with an aeration cavity, an air inlet and a liquid outlet, the air inlet and the liquid outlet are communicated with the aeration cavity, and the liquid outlet is lower than the air inlet. A first aeration port and a second aeration port which are higher than the liquid outlet and lower than the air inlet are formed in the aeration main body by the aeration cavity, and the second aeration port is higher than the first aeration port; wherein the liquid level in the aeration cavity is pressed by inlet air so as to change, so that when the first aeration opening is immersed, the second aeration opening discharges air independently, or when the first aeration opening and the second aeration opening are not immersed, the first aeration opening and the second aeration opening discharge air together. The sewage treatment device has multiple working modes and is good in adaptability to multiple sewage treatment scenes.

Description

Technical Field

[0001] This disclosure relates to the field of aeration technology, and more particularly to aeration devices and aeration methods for wastewater treatment. Background Technology

[0002] Currently, membrane module technology is a novel and highly efficient wastewater treatment process that combines efficient membrane separation technology with the traditional activated sludge process. Membrane modules achieve efficient sludge-water separation through hollow fiber membranes. Simultaneously, due to their effective retention capacity, sludge can be recycled, achieving deep wastewater purification. Furthermore, nitrifying bacteria can proliferate fully within the system, resulting in significant nitrification and enabling deep phosphorus and nitrogen removal.

[0003] The aerators used in membrane modules mainly include perforated tube aerators and pulse aerators. Perforated tube aerators typically involve evenly perforating a tube, laying the tube flat beneath the membrane module, and then ventilating to create small bubbles at the outlets for aeration and cleaning of the membrane module. Pulse aerators are a more recent technology that can significantly increase bubble volume, creating large bubbles through intermittent aeration, resulting in a noticeably improved cleaning effect. However, both types of aerators have relatively limited operating modes and poor adaptability to different wastewater treatment scenarios. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide an aeration device and aeration method that have multiple working modes and good adaptability to various wastewater treatment scenarios.

[0005] This disclosure provides an aeration device, comprising: an aeration body, an aeration chamber, an air inlet and a liquid outlet communicating with the aeration chamber, wherein the liquid outlet is positioned lower than the air inlet; the aeration chamber forms at least one first aeration port and at least one second aeration port in the aeration body, which are higher than the liquid outlet and lower than the air inlet, wherein the second aeration port is positioned higher than the first aeration port; wherein the liquid level in the aeration chamber is changed by air pressure to form separate air output from the second aeration port when the first aeration port is submerged, or joint air output when neither the first nor the second aeration port is submerged.

[0006] According to some embodiments provided in this disclosure, the drain outlet is disposed facing downwards and openly on the bottom wall of the aeration body.

[0007] According to some embodiments provided in this disclosure, the aeration body includes: an air inlet pipe with the air inlet; at least one aeration pipe located below the air inlet pipe and having the first aeration port and the drain port; and at least one connecting joint connecting the air inlet pipe and the aeration pipe and conducting the aeration pipe and the air inlet pipe, and having the second aeration port.

[0008] According to some embodiments provided in this disclosure, the connecting joint is detachably connected to the air inlet pipe and the aeration pipe.

[0009] According to some embodiments provided in this disclosure, there are multiple aeration pipes and multiple connecting joints that correspond one-to-one to form multiple aeration sections. The multiple aeration sections are spaced apart along the length direction of the air inlet pipe, and each aeration section has a first aeration port and a second aeration port on its opposite two sides.

[0010] According to some embodiments provided in this disclosure, the aeration pipe and the connecting joint are connected to form an aeration section, and two opposing first aeration ports and two opposing second aeration ports on each aeration section are arranged at the same height.

[0011] According to some embodiments provided in this disclosure, the air intake pipe includes: a plurality of air intake branch pipes arranged at intervals; both the aeration pipe and the connecting joint are multiple, and two adjacent air intake branch pipes are connected to the aeration pipe through the connecting joint.

[0012] According to some embodiments provided in this disclosure, the drain outlet is formed as a pipe opening on the bottom wall of the aeration pipe.

[0013] This disclosure also provides an aeration method using an aeration device as described in any of the preceding claims. The aeration method includes the following steps: inflating the air inlet with a first air inlet flow rate to compress the liquid level between the first aeration port and the second aeration port, so that the second aeration port emits air independently; and inflating the air inlet with a second air inlet flow rate greater than the first air inlet flow rate to compress the liquid level below the first aeration port, so that the second aeration port and the first aeration port emit air together.

[0014] According to some embodiments provided in this disclosure, the aeration device is used to aerate the wastewater treatment device, and the first air inlet flow rate and the second air inlet flow rate are determined based on the turbidity / volume of the wastewater to be treated by the wastewater treatment device.

[0015] Beneficial effects:

[0016] (1) The aeration device and aeration method provided in this disclosure have multiple working modes and are well adaptable to various sewage treatment scenarios.

[0017] (2) The aeration device and aeration method provided in this disclosure are not easily blocked by solid impurities such as sludge, thereby effectively reducing the frequency of maintenance.

[0018] (3) The aeration device and aeration method provided in this disclosure can adopt different air inlet flow rates according to different sewage treatment scenarios, so that the aeration device can switch to different working modes, while significantly reducing manufacturing costs and failure rates, making it easy to popularize. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the aeration device according to an embodiment of the present disclosure.

[0020] Figure 2 This is a schematic diagram of the aeration device in the low-speed aeration mode according to an embodiment of the present disclosure.

[0021] Figure 3 This is a schematic diagram of the aeration device in the high-speed aeration mode according to an embodiment of the present disclosure.

[0022] Figure 4 This is a cross-sectional schematic diagram of an aeration device according to an embodiment of the present disclosure.

[0023] Figure 5 This is a flowchart of an aeration method according to an embodiment of the present disclosure.

[0024] Figure 6 This is a schematic diagram of the connection of electronic components in the actual application of the aeration device according to the embodiments of this disclosure.

[0025] Figure 7 This is a schematic diagram of the aeration device of this disclosure installed on a pulse aerator at an angle.

[0026] Figure 8 This is a schematic diagram of the aeration device of this disclosure installed on a pulse aerator from another angle.

[0027] Figure 9 This is a cross-sectional schematic diagram of the aeration device of this disclosure installed after being mounted on a pulse aerator.

[0028] Figure label:

[0029] Aeration chamber 111; Air inlet 112; Liquid outlet 113; First aeration port 114; Second aeration port 115;

[0030] Intake pipe 12; Intake branch pipe 121;

[0031] Aeration pipe 13;

[0032] Connector 14;

[0033] Detection component 91; Flow regulating component 92; Control unit 93;

[0034] 81 outer shell; 811 aeration hole; 812 open opening; 813 aeration space; 814 partition wall; 82 gas collection hood; 821 gas collection inlet; 823 gas collection space; 84 gas outlet; 85 first fixed seat; 851 gas supply channel; 86 second fixed seat; 861 mounting part; 862 mounting port. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In related technologies, the aerators used in membrane modules mainly include perforated tube aerators and pulse aerators. Perforated tube aerators typically involve evenly perforated tubes, which are then laid flat beneath the membrane module. Aeration is then applied, creating small bubbles at each outlet to aerate and scrub the membrane module. However, current perforated tubes are laid flat, resulting in uniformly sized bubbles and insufficient scrubbing intensity. Pulse aerators, a more recent technology, can significantly increase bubble volume, creating large bubbles through intermittent aeration, thus improving the scrubbing effect. Furthermore, both of these aerators have relatively limited operating modes and poor adaptability to different wastewater treatment scenarios.

[0045] In addition, garbage and settled sludge can easily accumulate in the aeration pipes of perforated pipe aerators and the air supply pipes of pulse aerators, which can easily cause the aeration pipes of perforated pipe aerators and the air supply pipes of pulse aerators to be blocked by sludge, affecting the aeration function.

[0046] Therefore, this disclosure provides an aeration device that can form a low-speed aeration mode and a high-speed aeration mode according to high and low aeration requirements, exhibiting good adaptability. It is worth noting that the low-speed aeration mode and the high-speed aeration mode can be understood as the aeration device having two aeration modes with different aeration speeds, wherein the aeration speed of the high-speed aeration mode is greater than that of the low-speed aeration mode.

[0047] Figure 1 This is a schematic diagram of the aeration device according to an embodiment of the present disclosure. Figure 2 This is a schematic diagram of the aeration device in the low-speed aeration mode according to an embodiment of the present disclosure. Figure 3 This is a schematic diagram of the aeration device in the high-speed aeration mode according to an embodiment of the present disclosure.

[0048] See Figures 1 to 3 An aeration device according to an embodiment of this disclosure includes an aeration body. The aeration body has an aeration chamber 111 and an air inlet 112 and a drain outlet 113 communicating with the aeration chamber 111. The drain outlet 113 is positioned lower than the air inlet 112. Therefore, when the aeration device is placed in a liquid environment (e.g., a wastewater environment), gas (e.g., air) enters the aeration chamber 111 through the air inlet 112, and upon entering the aeration chamber 111, it compresses the liquid within the aeration chamber 111, thereby causing a change in the liquid level within the aeration chamber 111.

[0049] Optionally, the drain port 113 is disposed facing downwards on the bottom wall of the aeration body. Thus, solid impurities in the liquid, such as sludge in sewage, will fall out of the aeration device through the drain port 113 under gravity. This makes it difficult for solid impurities to deposit and clog the aeration chamber 111 when the aeration device is operating in the liquid, thereby effectively reducing the maintenance frequency of the aeration device.

[0050] Optionally, both the first aeration port 114 and the second aeration port 115 are located on the side of the aeration body. Therefore, compared to the second aeration port 115 being located on the top surface of the aeration body and opening upwards, the pressure effect on the liquid level inside the aeration body is better after the gas enters, preventing the gas from being completely aerated from the upward-opening first aeration port 114 and thus affecting the pressure effect on the liquid level.

[0051] The aeration chamber 111 forms a first aeration port 114 and a second aeration port 115 in the aeration body, which is higher than the drain port 113 and lower than the air inlet 112. The second aeration port 115 is positioned higher than the first aeration port 114. The liquid level in the aeration chamber 111 is changed by the pressure of incoming air, resulting in either separate air output from the second aeration port 115 when the first aeration port 114 is submerged, or joint air output when neither the first aeration port 114 nor the second aeration port 115 is submerged.

[0052] It is understood that the submersion / non-submersion of the first aeration port 114 and the second aeration port 115 is mainly relative to the liquid level inside them. If the first aeration port 114 is submerged in its internal liquid and the second aeration port 115 is not submerged in its internal liquid, that is, as... Figure 2 As shown, when the gas flowing into the aeration chamber 111 is aerated to the outside of the aeration device, the gas can only exit from the second aeration port 115 and cannot exit from the first aeration port 114. If neither the first aeration port 114 nor the second aeration port 115 is submerged in its internal liquid, i.e.... Figure 3 As shown, when the gas flowing into the aeration chamber 111 is aerated to the outside of the aeration device, the gas can be discharged not only from the second aeration port 115 but also from the first aeration port 114.

[0053] In other words, when the air intake compresses the liquid level in the aeration chamber 111 to be higher than the first aeration port 114 and lower than the second aeration port 115, thereby causing the first aeration port 114 to be submerged in liquid and the second aeration port 115 to be exposed alone, i.e. Figure 2As shown, the gas in the aeration chamber 111 is individually discharged from the second aeration port 115 and forms bubbles that rise at a certain rate. Thus, the gas can be aerated through the second aeration port 115 at a certain speed, enabling the aeration device to have a low-speed aeration mode.

[0054] When the air intake compresses the liquid level in the aeration chamber 111 to be lower than the first aeration port 114, thereby exposing both the first aeration port 114 and the second aeration port 115, that is... Figure 3 As shown, the gas entering the aeration chamber 111 is discharged from the second aeration port 115 and the first aeration port 114 respectively, forming rising bubbles. During the rising process, the bubbles discharged from the first aeration port 114 and the bubbles discharged from the second aeration port 115 mix and become larger bubbles, thereby increasing both the number and volume of bubbles formed by aeration. That is, not only does the number of bubbles increase, but the bubble volume also increases, and the larger bubbles rise faster in the external liquid environment outside the aeration device, significantly improving the aeration speed of the aeration device. Therefore, the aeration device of this embodiment can have multiple operating modes, which is beneficial for the aeration device to adapt to various wastewater treatment scenarios and has good adaptability.

[0055] For example, when a membrane module with hollow membrane filaments (such as an MBR membrane biofilm module with attached aerobic bacteria) is used to treat wastewater, the aeration device is used to aerate the membrane module. The aeration device can be placed in the wastewater and below the membrane module in the wastewater. It is used to provide oxygen to the membrane module and to use the mechanical disturbance energy generated by the gas flow to scrub the hollow membrane filaments of the membrane module, thereby reducing the deposition of pollutants on the surface of the hollow membrane filaments. Therefore, when the wastewater treated by the membrane module has a high turbidity level / a large volume of wastewater treated and a high permeate flow rate, resulting in a high aeration rate and mechanical disturbance energy required for the membrane module to operate, the aeration device can adopt the aforementioned high-speed aeration mode. In this mode, gas is drawn from the aeration device and flows through the external liquid environment outside the aeration device where the membrane module is located. This not only provides a large air volume to the membrane module, but the high flow velocity of the large bubbles also generates significant mechanical disturbance energy, creating a strong impact force on the hollow membrane fibers of the membrane module. This makes the mechanical disturbance amplitude and scrubbing effect on the hollow membrane fibers more significant. Conversely, when the wastewater treated by the membrane module has a low turbidity level / a large volume of wastewater treated and a high permeate flow rate, and the required aeration rate and mechanical disturbance energy for the membrane module to operate are normal, the aeration device can adopt the aforementioned low-speed aeration mode to meet the normal aeration rate and mechanical disturbance energy requirements of the membrane module.

[0056] Optionally, the opening areas of the first aeration port 114 and the second aeration port 115 are the same, so that the opening area for aeration of the aeration device can be increased several times in the high-speed aeration mode compared to the low-speed aeration mode. This is beneficial to achieve several times the change in the number of bubbles and the volume of bubbles after mixing. It is also beneficial to increase the mechanical disturbance effect of the aeration device several times in the high-speed aeration mode, which greatly meets the aeration requirements when the permeate flow rate of the membrane module is high or the turbidity of the sewage is high.

[0057] Optionally, the opening area of ​​the first aeration port 114 may also be larger than the area of ​​the second aeration port 115, which is beneficial for aerating larger volume bubbles from the first aeration port 114. Larger volume bubbles rise faster in the external liquid environment outside the aeration device, and can form larger bubbles after mixing with the bubbles aerated from the second aeration port 115, which is more conducive to improving the aeration speed and the mechanical disturbance energy of aeration.

[0058] Optionally, both the first aeration port 114 and the second aeration port 115 are circular holes, which facilitates the smooth passage of air bubbles through the circular holes and their exit from the circular holes.

[0059] Optionally, see Figure 1 The aeration unit includes an air inlet pipe 12, at least one aeration pipe 13, and at least one connecting joint 14. The air inlet pipe 12 is provided with an air inlet 112. The aeration pipe 13 is located below the air inlet pipe 12 and is provided with a first aeration port 114 and a drain port 113. The connecting joint 14 connects the air inlet pipe 12 and the aeration pipe 13, and conducts between them, and is provided with a second aeration port 115. Therefore, the aeration device can be formed by assembling pipes, without moving parts or fittings such as screws, resulting in a stable structure, longer service life, and easy placement in wastewater.

[0060] Optionally, the drain outlet 113 is formed as an opening in the bottom wall of the aeration pipe 13. This allows solid impurities, such as sludge, within the aeration pipe 13 to easily fall out through the opening, preventing sludge buildup and blockage within the aeration pipe 13, thus effectively reducing the maintenance frequency of the aeration device. However, it is understood that the drain outlet 113 can be configured in various ways, including but not limited to this, and other opening configurations, such as semi-opening configurations, are also within the scope of this disclosure.

[0061] Figure 4 This is a schematic cross-sectional view of an aeration device according to an embodiment of this disclosure. See also... Figure 1 and Figure 4The aeration pipe 13 and the connecting joint 14 are both single entities connected to form one aeration section. Alternatively, there are multiple aeration pipes 13 and connecting joints 14, each corresponding to the other to form multiple aeration sections. These multiple aeration sections are spaced apart along the length of the air inlet pipe 12, and each aeration section has a first aeration port 114 and a second aeration port 115 on opposite sides. Specifically, there are four aeration pipes 13 and four connecting joints 14, each corresponding to the other to form four aeration sections. These four aeration sections are spaced apart along the length of the air inlet pipe 12, and each aeration section has a first aeration port 114 and a second aeration port 115 on opposite sides. Thus, the multiple aeration sections can form multiple sets of first aeration ports 114 and second aeration ports 115 evenly distributed within a predetermined area, allowing gas to be aerated more evenly through the multiple first aeration ports 114 and second aeration ports 115, which helps to increase the aeration volume and the uniformity of aeration within the predetermined area.

[0062] In addition, it is worth mentioning that, compared to the second aeration port 115 being located on the top surface of the connecting joint 14 and opening upwards, after the gas enters the air intake pipe 12, it can be better transported along the air intake pipe 12 to the very end of the air intake pipe 12 away from the air inlet 112. This helps to ensure that the gas entering the air intake pipe 12 can reach the very end of the air intake pipe 12 and compress the liquid level in the aeration section at the very end, which helps to ensure the gas distribution in the aeration section at the very end.

[0063] For example, see Figure 4 Each aeration section has two opposing first aeration ports 114 and two opposing second aeration ports 115 arranged at the same height. That is, the two opposing first aeration ports 114 and the two opposing second aeration ports 115 on each aeration section are also arranged at the same height. Therefore, when gas flows through the aeration section, the two opposing first aeration ports 114 and the two opposing second aeration ports 115 on each aeration section can simultaneously release gas, allowing the formed bubbles to be simultaneously aerated from opposite sides of the aeration section. This ensures that the bubbles aerated from both sides of the aeration section can almost simultaneously reach the position beyond the air inlet pipe 12, and mix above the air inlet pipe 12 to form larger bubbles, which helps to increase the volume of the mixed bubbles and the aeration speed.

[0064] Optionally, the connecting joint 14 can be integrally formed with the air inlet pipe 12 and the aeration pipe 13. The connecting joint 14 can also be detachably connected to the air inlet pipe 12 and the aeration pipe 13. Therefore, the entire aeration device is easy to disassemble and assemble. Furthermore, if the first aeration port 114 and / or the second aeration port 115 becomes blocked, maintenance can be completed by replacing the corresponding connecting joint 14 and / or the aeration pipe 13, resulting in low maintenance and replacement costs for the aeration device.

[0065] For example, the air inlet pipe 12 includes multiple air inlet branch pipes 121. There are also multiple aeration pipes 13 and multiple connecting joints 14, and adjacent air inlet branch pipes 121 are connected and communicate with the aeration pipe 13 via the connecting joints 14. Therefore, the aeration device is easy to assemble and arrange.

[0066] Specifically, the connecting joint 14 includes a tee joint and / or a bend joint. Two adjacent air inlet branch pipes 121 are connected to the aeration pipe 13 via the tee joint. The air inlet branch pipe 121 located at the air inlet end is connected to the aeration pipe 13 via the bend joint. The tee joint and / or the bend joint can be connected to the aeration pipe 13 and the air inlet branch pipe 121 by assembly and bonding. Therefore, the aeration device is easy to assemble and has low assembly cost.

[0067] Figure 5 This is a flowchart of an aeration method according to an embodiment of this disclosure. See also... Figure 1 and Figure 5 This disclosure also discloses an aeration method utilizing an aeration device as exemplified above, the aeration method comprising the following steps:

[0068] S10: Inflate the air inlet 112 with a first air inlet flow rate so that the air inlet presses the liquid level between the first aeration port 114 and the second aeration port 115 so that the second aeration port 115 can discharge air independently.

[0069] S20: Air is introduced into the air inlet 112 at a second air inlet flow rate greater than the first air inlet flow rate, so that the air inlet compresses the liquid level below the first aeration port 114, so that the second aeration port 115 and the first aeration port 114 both emit air. Thus, by introducing gas with different air inlet flow rates into the air inlet 112, the aeration device can have a low-speed aeration mode where the second aeration port 115 emits air alone, and a high-speed aeration mode where the second aeration port 115 and the first aeration port 114 emit air simultaneously. This allows for flexible adoption of different aeration modes in different wastewater treatment scenarios, demonstrating good adaptability.

[0070] Optionally, as the foregoing analysis shows, the aeration device can be used to aerate membrane modules used for wastewater treatment. The first and second air inlet flow rates can be determined based on the turbidity / volume of the wastewater to be treated by the membrane module. For example, when the turbidity / volume of the wastewater to be treated by the membrane module is a lower value than a preset value, the aeration device uses a lower first air inlet flow rate to implement a low-speed aeration mode, with air exiting solely through the second aeration port 115. Conversely, when the turbidity / volume of the wastewater to be treated by the membrane module is a higher value than the preset value, the aeration device uses a higher second air inlet flow rate to implement a high-speed aeration mode, with air exiting simultaneously through the second aeration port 115 and the first aeration port 114.

[0071] Figure 6 This is a schematic diagram showing the connection of electronic components in the actual application of the aeration device according to an embodiment of this disclosure. (See also...) Figure 6 When the aeration device is used to aerate a membrane module in a wastewater, the aeration device may further include a flow regulating element 92, a detection element 91, and a control unit 93.

[0072] The flow regulator 92 is located at the air inlet 112 to control the air intake flow rate. Optionally, the flow regulator 92 can be a control valve. The control valve is located at the air inlet 112 and is used to adjust the air intake flow rate at the air inlet 112 by adjusting its own opening. The detection element 91 is installed in the sewage, such as a sewage tank, to detect the turbidity / volume of the sewage. Optionally, the detection element 91 can be an optical sensor, which measures the turbidity of the sewage based on the principle that the transmittance of light is proportional to the turbidity of water. The detection element 91 can also be a level detector, such as a level sensor, to detect the liquid level and determine the sewage volume. The control unit 93 is connected to the flow regulator 92 and the detection element 91 respectively, and is used to control the air intake flow rate according to the detected sewage turbidity / volume to change the liquid level in the aeration device. For example, when the detection element 91 detects high turbidity in the wastewater or a large volume of wastewater to be treated, the control unit 93 can control the control valve to a larger opening, allowing the air inlet 112 to intake air at a larger second airflow rate, thus enabling the first aeration port 114 and the second aeration port 115 to aerate simultaneously. When the detection element 91 detects low turbidity in the wastewater or a small volume of wastewater to be treated, the control unit 93 can control the control valve to a smaller opening, allowing the air inlet 112 to intake air at a smaller first airflow rate, thus enabling the second aeration port 115 to aerate independently.

[0073] The aeration device of this disclosure can also be used in a pulse aerator. Figure 7This is a schematic diagram of the aeration device of this disclosure installed on a pulse aerator at an angle. Figure 8 This is a schematic diagram of the aeration device of this disclosure installed on a pulse aerator from another angle. Figure 9 This is a cross-sectional schematic diagram of the aeration device of this disclosure installed after being mounted on a pulse aerator. Figure 9 The solid arrows in the text indicate the direction of gas flow in the aeration device and pulse aerator.

[0074] See Figure 7 and Figure 9 The pulse aerator includes a housing 81 and an air collection hood 82. At least one aeration space 813 is formed within the housing 81, and the top wall of the housing 81 has at least one aeration hole 811 communicating with the at least one aeration space 813. An open opening 812 communicating with the aeration space 813 is formed on the bottom surface of the housing 81. An air outlet 84 is formed on the top wall, extending vertically from the periphery of the aeration hole 811 towards the open opening 812. The gas collecting hood 82 surrounds the outer periphery of the air outlet cylinder 84, and a gas collecting space 823 is formed between the inner surface of the gas collecting hood 82 and the outer surface of the air outlet cylinder 84. The top surface of the gas collecting hood 82 is provided with a gas collecting inlet 821 that communicates with the gas collecting space 823. A gap is formed between the bottom surface of the gas collecting hood 82 and the bottom surface of the air outlet cylinder 84 so that the gas collecting space 823 can communicate with the aeration holes 811 through the air outlet cylinder 84. This allows the aeration holes 811 to aerate intermittently when the pulse aerator is placed in the sewage tank and gas is continuously injected into the gas collecting chamber. The aeration body is located below the aeration space 813 to supply air to the aeration space 813.

[0075] When the pulse aerator is working, it is placed in the sewage. The second aeration port 115 supplies air to the aeration space 813 individually and continuously, or the first aeration port 114 and the second aeration port 115 supply air to the aeration space 813 together and continuously. The introduced gas first enters the aeration space 813, then enters the space between the top of the air collection hood 82 and the top wall of the outer shell 81, and enters the air collection space 823 through the air collection inlet 821 at the top of the air collection hood 82, continuously lowering the water level in the air collection space 823 until the water level in the air collection hood 82 drops to be level with the bottom opening of the air outlet 84, and is then aerated through the aeration holes 811 at the top of the air outlet 84. At the same time, due to the siphon principle, the water level in the air collection hood 82 will rise again instantly, causing the air collection hood 82 to be backflowed and filled with sewage. During the above process, the gas will accumulate in the gas collection hood 82 for a period of time before being released. The released bubbles are large and have high kinetic energy, resulting in a good aeration and scrubbing effect on the membrane module.

[0076] Meanwhile, since the airflow rates are different when the second aeration port 115 aerates alone and when the first aeration port 114 and the second aeration port 115 aerate together, the airflow rate when the first aeration port 114 and the second aeration port 115 aerate together is larger. When the first aeration port 114 and the second aeration port 115 aerate together, the air volume in the gas collection hood 82 fills up and is aerated quickly. Therefore, when the first aeration port 114 and the second aeration port 115 aerate together, the frequency of intermittent aeration of the aeration hole 811 is high. Thus, when the aeration device of this disclosure is used to supply air to the pulse air box of the pulse aerator, the pulse air box can collect small bubbles and then release them intermittently to become large bubbles, and can realize high-frequency and high-speed pulse aeration as well as low-frequency and low-speed pulse aeration of the pulse aerator.

[0077] Optionally, the bottom of the gas collection hood 82 is provided with a sludge discharge port, so that the sludge can be discharged from the bottom of the gas collection hood 82, thereby preventing the sludge from clogging the bottom opening of the air outlet 84.

[0078] Optionally, see Figure 8 and Figure 9 The outer casing 81 has multiple partition walls 814 extending downwards from the top wall to divide and form multiple aeration spaces 813. The top surface of the outer casing 81 has multiple aeration holes 811 corresponding to the multiple aeration spaces 813. Multiple aeration sections are formed by the corresponding connection of the aeration pipe 13 and the connecting joint 14, and each aeration section is arranged to supply air to the multiple aeration spaces 813. This facilitates uniform air supply to the multiple aeration spaces 813 and ensures simultaneous and uniform aeration of the multiple aeration spaces 813.

[0079] Optionally, the outer shell of the pulse aerator is further provided with a first fixing seat 85 and a second fixing seat 86 on opposite sides. The first fixing seat 85 is provided with an air supply channel 851 for the air inlet pipe 12 to be connected to the ground to supply air to the air inlet pipe 12. The aeration section located at the end is connected to the second fixing seat 86.

[0080] Specifically, see Figure 8 The second fixing seat 86 has a mounting part 861 with a mounting port 862 on its side near the pulse aerator. The aeration part located at the end is installed in the mounting port 862, thereby fixing the aeration part located at the end.

[0081] 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. An aeration device, characterized in that, include: The aeration body is provided with an aeration chamber and an air inlet and a liquid outlet communicating with the aeration chamber, wherein the liquid outlet is set lower than the air inlet; The aeration chamber forms at least one first aeration port and at least one second aeration port in the aeration body, which are higher than the drain port and lower than the air inlet port, with the second aeration port being higher than the first aeration port; wherein, the liquid level in the aeration chamber is changed by the pressure of the incoming air, so as to form separate air output from the second aeration port when the first aeration port is submerged, or joint air output when neither the first aeration port nor the second aeration port is submerged.

2. The aeration device according to claim 1, characterized in that, The drain outlet is located on the bottom wall of the aeration body, facing downwards and open.

3. An aeration device according to claim 1, characterized in that, The aeration body includes: The air intake pipe is provided with the air intake port; At least one aeration pipe is provided below the air inlet pipe, and is provided with the first aeration port and the liquid outlet; and At least one connecting joint connects the air inlet pipe and the aeration pipe and conducts the air inlet pipe and the aeration pipe, and is provided with a second aeration port.

4. An aeration device according to claim 3, characterized in that, The connecting joint is detachably connected to the air inlet pipe and the aeration pipe.

5. An aeration device according to claim 3, characterized in that, The aeration pipes and the connecting joints are multiple and correspond one-to-one to form multiple aeration sections. The multiple aeration sections are spaced apart along the length of the air inlet pipe, and each aeration section has a first aeration port and a second aeration port on its opposite sides.

6. An aeration device according to claim 3, characterized in that, The aeration pipe and the connecting joint are connected to form an aeration section, and the two opposite first aeration ports and the two opposite second aeration ports on each aeration section are set at the same height.

7. An aeration device according to claim 3, characterized in that, The air intake pipe includes: Multiple air inlet branch pipes are spaced apart; wherein, there are multiple aeration pipes and multiple connecting joints, and two adjacent air inlet branch pipes are connected to the aeration pipe through the connecting joints.

8. An aeration device according to claim 3, characterized in that, The drain outlet is formed as a pipe opening on the bottom wall of the aeration pipe.

9. An aeration method, characterized in that, Aeration is performed using the aeration device as described in any one of claims 1 to 8, and the aeration method includes the following steps: Air is introduced into the air inlet at a first air flow rate so that the air pressure compresses the liquid level between the first aeration port and the second aeration port, so that the second aeration port can discharge air independently. Air is introduced into the air inlet at a second air inlet flow rate greater than the first air inlet flow rate, so that the air inlet pressures the liquid level below the first aeration port, so that the second aeration port and the first aeration port both release air.

10. The aeration method according to claim 9, characterized in that, The aeration device is used to aerate the wastewater treatment device, and the first air inlet flow rate and the second air inlet flow rate are determined based on the turbidity / volume of the wastewater to be treated by the wastewater treatment device.

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