CN114057306A - Closed sewage treatment lifting mobile aeration device and maintenance method - Google Patents
Closed sewage treatment lifting mobile aeration device and maintenance method Download PDFInfo
- Publication number
- CN114057306A CN114057306A CN202110893572.7A CN202110893572A CN114057306A CN 114057306 A CN114057306 A CN 114057306A CN 202110893572 A CN202110893572 A CN 202110893572A CN 114057306 A CN114057306 A CN 114057306A
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- aeration
- assembly
- suspension
- top wall
- sewage treatment
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- 238000005273 aeration Methods 0.000 title claims abstract description 146
- 239000010865 sewage Substances 0.000 title claims abstract description 37
- 238000012423 maintenance Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 241000561734 Celosia cristata Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention provides a closed sewage treatment lifting mobile aeration device and an overhauling method. The aeration tank comprises a bottom wall, a side wall intersecting with the bottom wall and a top wall opposite to the bottom wall, and the top wall is provided with an access hole; the aeration component is arranged in the aeration tank; the lifting assembly is connected with the aeration assembly and can drive the aeration assembly to reciprocate between the bottom wall and the top wall of the aeration tank; the suspension assembly is arranged on the top wall of the aeration tank and comprises a driving part and a suspension part, the driving part is connected with the suspension part and can drive the suspension part to move along the top wall, and the suspension part is used for suspending the aeration assembly close to the top wall and moving the aeration assembly to the access hole of the top wall. The closed sewage treatment device and the maintenance method provided by the embodiment of the invention can improve the mobile aeration device and reduce the maintenance difficulty of the aeration component.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a lifting mobile aeration device for closed sewage treatment and an overhauling method.
Background
In order to ensure that the domestic sewage or the industrial sewage meets the water quality requirement of being discharged into a certain water body or reused, the domestic sewage or the industrial sewage is purified. An aeration device is usually used in sewage treatment in a sewage treatment plant, and the aeration device is a fragile and consumable part and needs to be replaced periodically according to efficiency time. In the prior art, the replacement or the maintenance of an aeration device such as an aeration pipe of a sewage treatment plant needs drainage or submergence, and is troublesome in replacement or maintenance and consumes a large amount of time and physical strength. Particularly, in the closed sewage treatment facility, the replacement or maintenance of the aeration apparatus becomes an obstacle to the development of the closed or underground space sewage treatment facility.
Therefore, a new enclosed sewage treatment lifting mobile aeration apparatus and maintenance method are needed to solve the above technical problems.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a method for maintaining a closed sewage treatment system, which can improve the mobile aeration apparatus and an aeration tank, and aims to reduce the difficulty in maintaining and repairing the aeration apparatus.
The technical scheme of the invention is as follows:
in one aspect, the embodiment of the invention provides a closed type sewage treatment lifting mobile aeration device, which comprises an aeration tank, an aeration component, a lifting component and a suspension component. The aeration tank comprises a bottom wall, a side wall intersecting with the bottom wall and a top wall opposite to the bottom wall, and the top wall is provided with an access hole; the aeration component is arranged in the aeration tank; a lifting assembly connected to the aeration assembly and capable of driving the aeration assembly to reciprocate between the bottom wall and the top wall of the aeration tank; the suspension assembly is arranged on the top wall of the aeration tank and comprises a driving part and a suspension part, the driving part is connected with the suspension part and can drive the suspension part to move along the top wall, and the suspension part is used for suspending the aeration assembly close to the top wall and moving the aeration assembly to the access opening of the top wall.
According to an aspect of an embodiment of the present invention, the lifting assembly includes a guide rod, a pulley block, a connecting member, and a traction part, wherein the guide rod is disposed along a height direction of the aeration tank, the pulley block is slidably connected to the guide rod, the pulley block is connected to the aeration assembly through the connecting member, the traction part is disposed outside the aeration tank, and the traction part can drive the pulley block to move along the guide rod.
According to one aspect of the embodiment of the invention, the number of the guide rods is two, and the pulley block is two groups of connecting parts.
According to an aspect of an embodiment of the present invention, the lifting assembly includes a guide fixing part, and the guide is fixedly connected to the sidewall of the aeration tank by the guide fixing part.
According to an aspect of the embodiment of the present invention, the driving part comprises a guide rail, a motor and a driving wheel, wherein the guide rail is connected to the top wall of the aeration tank, the motor is slidably connected with the guide rail through the driving wheel, and the motor drives the driving wheel to realize reciprocating motion along the guide rail.
According to an aspect of an embodiment of the present invention, the suspension member includes a suspension body and two suspension arms, and the two suspension arms are oppositely disposed on both sides of the suspension body.
On the other hand, the embodiment of the invention also provides a maintenance method of the closed sewage treatment lifting mobile aeration device, which comprises the following steps:
lifting the aeration assembly to a predetermined area by using a lifting assembly, wherein the lifting assembly is the lifting assembly in any one of the embodiments;
and grabbing the aeration assembly by using a suspension assembly, and moving the aeration assembly to an access hole of the aeration tank, wherein the suspension assembly is the suspension assembly in any one of the embodiments.
The invention has the beneficial effects that: according to the closed sewage treatment lifting and moving aeration device and the maintenance method, when the aeration assembly is maintained, the lifting assembly is used for lifting the aeration assembly to the water surface, then the aeration assembly is grabbed by the hanging part, and the hanging part is driven by the driving part to move the aeration assembly to the maintenance port accessory of the aeration tank, so that the maintenance and the maintenance of the aeration assembly are facilitated, manual re-drainage or diving is not needed for maintenance and repair, the maintenance and the maintenance difficulty of the aeration assembly is reduced, and time and labor are saved.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
FIG. 1 is a schematic structural diagram of a closed sewage treatment lifting mobile aeration device provided by an embodiment of the invention;
FIG. 2 is a schematic structural view of a suspension assembly of the closed sewage treatment liftable mobile aeration apparatus shown in FIG. 1;
fig. 3 is a schematic structural view of a lifting assembly in the closed sewage treatment liftable mobile aeration apparatus shown in fig. 1.
The components represented by the reference numerals in the figures are:
10. the aeration tank 11, the bottom wall 12, the side walls 13, the bottom wall 131 and the access hole;
20. an aeration assembly;
30. the device comprises a lifting assembly 31, a guide rod 32, a pulley block 321, a first pulley 322, a second pulley 33, a connecting component 34, a traction part 35, a pulley fixing component 36 and a guide rod fixing component;
40. suspension assembly, 41, drive unit, 411, guide rail, 412, motor, 413, drive wheel, 414, connecting part motor mounting part, 42, suspension unit, 421, suspension body, 422, suspension arm, 43, protection rope.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Referring to fig. 1-3, fig. 1 is a schematic structural view of a closed sewage treatment liftable mobile aeration apparatus according to an embodiment of the present invention, fig. 2 is a schematic structural view of a suspension assembly in the closed sewage treatment liftable mobile aeration apparatus shown in fig. 1, and fig. 3 is a schematic structural view of a lifting assembly in the closed sewage treatment liftable mobile aeration apparatus shown in fig. 1.
The closed sewage treatment lifting mobile aeration device 10 provided by the embodiment of the invention comprises an aeration tank 10, an aeration assembly 20, a lifting assembly 30 and a suspension assembly 40.
The aeration tank 10 includes a bottom wall 11, a side wall 12 intersecting the bottom wall 11, and a top wall 13 opposite to the bottom wall 11, the top wall 13 being provided with a service opening 131. The aeration assembly 20 is disposed in the aeration tank 10. The lifting assembly 30 is connected to the aeration assembly 20 and is capable of driving the aeration assembly 20 to reciprocate between the bottom wall 11 and the top wall 13 of the aeration tank 10. The suspension assembly 40 is disposed on the top wall 13 of the aeration tank 10, the suspension assembly 40 includes a driving part 41 and a suspension part 42, the driving part 41 is connected with the suspension part 42 and can drive the suspension part 42 to move along the top wall 13, and the suspension part 42 is used for suspending the aeration assembly 20 close to the top wall 13 and moving the aeration assembly 20 to the access opening 131 of the top wall 13.
It should be noted that the access opening 131 may be square, circular or other shapes, and the size of the access opening 131 may be selected according to actual requirements. In addition, a door body can be arranged on the access hole 131 to increase safety. The aeration assembly 20 may include a plurality of air distribution pipes and a plurality of aeration pipes connected to the air distribution pipes, and the plurality of aeration pipes may be in a zigzag shape or an antenna shape so as to facilitate grasping by the hanging part 42 of the hanging assembly 40.
According to the closed sewage treatment lifting and moving aeration device 10 provided by the embodiment of the invention, when the aeration component 20 is maintained, the lifting component 30 is used for lifting the aeration component 20 to the water surface, then the suspension component 42 is used for grabbing the aeration component 20, and the driving component 41 is used for driving the suspension component 42 to move the aeration component 20 to the access hole 131 of the aeration tank 10, so that the aeration component 20 is conveniently maintained and maintained, the manual operation for maintaining and maintaining the aeration component 20 under water is not needed, the maintenance and maintenance difficulty of the aeration component 20 is reduced, and the time and labor are saved.
In some alternative embodiments, the lifting assembly 30 comprises a guide rod 31, a pulley block 32, a connecting member 33 and a traction part 34, wherein the guide rod 31 is disposed along the height direction of the aeration tank 10, and the length of the guide rod 31 can be selected according to actual requirements. The pulley block 32 is slidably connected to the guide rod 31, the pulley block 32 is connected to the aeration assembly 20 through a connecting member 33, a traction part 34 is disposed outside the aeration tank 10, and the traction part 34 can drive the pulley block 32 to move along the guide rod 31. Through the arrangement, the aeration assembly 20 can be easily pulled out of the water surface, and time and labor are saved.
Alternatively, the traction part 34 may be a traction device such as a winch or a crane. The connecting member 33 may be a plate-shaped structure or an L-shaped structure, and the connecting member 33 and the aeration assembly 20 may be detachably connected, so that the aeration assembly 20 can be conveniently detached from the connecting member 33 for maintenance.
Alternatively, the traction portion 34 of the lifting assembly 30 may be connected with the aeration assembly 20 through the connection member 33. Further, the traction portion 34 and the connection member 33 may be connected by a rope such as a wire rope.
In some alternative embodiments, the number of the guide rods 31 is two, the number of the pulley blocks 32 is two, and the two guide rods 31 are respectively provided with the pulley blocks 32, so that the traveling stability of the pulley blocks 32 can be improved by increasing the number of the guide rods 31 and the pulley blocks 32, and the connection stability between the pulley blocks and the aeration assembly 20 can be improved.
The two sets of pulley blocks 32 are connected by pulley mounts 35 to which the connecting members 33 are connected, thereby increasing the structural stability of the pulley block 32 as a whole.
In some embodiments, the pulley fixing member 35 may be detachably connected to the connecting member 33, and of course, in other embodiments, the pulley fixing member 34 and the connecting member 33 may be integrally formed to increase structural stability and reduce difficulty in forming.
In some alternative embodiments, the pulley assembly 32 includes a first pulley 321 and a second pulley 322, the first pulley 321 and the second pulley 322 are respectively disposed on two sides of the guide rod 31 and are slidably connected to the guide rod 31, and the first pulley 321 and the second pulley 322 are rotatably connected to the pulley fixing member 35. The first pulley 321 and the second pulley 322 form a hoop structure on two sides of the guide rod 31, and are tightly attached to two sides of the guide rod 31, so that the traveling stability of the pulley block 32 can be improved, the pulley block 32 can be prevented from being separated from the guide rod 31, and the stability of the sliding connection between the pulley block 32 and the guide rod 31 can be improved. Alternatively, the set of pulley assemblies 32 may include three pulleys, one of which is disposed near the connecting member 33 and the other two of which are disposed far from the connecting member 33, and since the connecting member 33 is connected to the aeration assembly 20, the two pulleys far from the connecting member 33 can provide a more stable supporting force to prevent the aeration assembly 20 from being separated from the guide rod 31.
Further, in order to further increase the stability of the sliding connection between the pulley block 32 and the guide rod 31 and simultaneously improve the stability of the travel of the pulley block 32, the lifting assembly 30 further includes a guide rod fixing part 36, and the guide rod 31 is fixedly connected to the side wall 12 of the aeration tank 10 through the guide rod fixing part 36.
In some alternative embodiments, the driving unit 41 comprises a guide rail 411, a motor 412 and a driving wheel 413, wherein the guide rail 411 is connected to the top wall 13 of the aeration tank 10, the motor 412 is slidably connected with the guide rail 411 through the driving wheel 413, and the motor 412 drives the driving wheel 413 to realize reciprocating motion along the guide rail 411. Alternatively, the guide rail 411 may be a bar-shaped guide rail 411 provided with a rack structure, and the driving wheel 413 may be a gear, and the gear and the rack are engaged with each other, so that the motor 412 can stably travel on the guide rail 411. Alternatively, the motor 412 may be a stepper motor.
Further, the number of the guide rails 411 is two, the number of the motors 412 is two, the two motors 412 are respectively slidably connected to the two guide rails 411, and the two motors 412 are connected by a connecting member motor mounting member 414. The two motors 412 can increase the traveling power and improve the moving efficiency. Alternatively, both ends of the coupling member motor mount 414 may be rotatably coupled to output shafts of the two motors 412, respectively. Alternatively, two motors 412 are fixed to the connecting member on the opposite outer sides of the motor mounting member 414, respectively, and the motors 412 are connected to the driving wheels 413 through a gear train.
In some alternative embodiments, a protective rope 43 is disposed between the hanging assembly 40 and the top wall 13 of the aeration tank 10, and the protective rope 43 is slidably connected to the top wall 13, so that the hanging assembly 40 is prevented from falling into the water when the hanging assembly 40 is separated from the top wall 13 of the aeration tank 10, and the safety of the hanging assembly 40 is increased. Alternatively, the protective cords 43 may be fixedly coupled to the coupling member motor mount 414 of the suspension assembly 40.
In some alternative embodiments, the suspension member 42 includes a suspension body 421 and two suspension arms 422, the two suspension arms 422 are oppositely disposed at two sides of the suspension body 421, and the two suspension arms 422 are both curved to be able to grab the aeration assembly 20. In some embodiments, the suspension arm 422 can be detachably connected to the suspension body 421, and of course, in other embodiments, the suspension arm 422 and the suspension body 421 can be an integral structure to increase the structural stability and reduce the molding difficulty.
In addition, the embodiment of the invention also provides a maintenance method of the closed sewage treatment lifting mobile aeration device, which comprises the following steps:
s1: and lifting the aeration assembly to a predetermined area by using a lifting assembly, wherein the lifting assembly is the lifting assembly in any one of the embodiments.
Alternatively, the predetermined area may be any area where the aeration assembly curves to float above the water surface of the aeration tank.
S2: and grabbing the aeration assembly by using the suspension assembly, and moving the aeration assembly to the access hole of the aeration tank, wherein the suspension assembly is the suspension assembly in any one of the embodiments.
Optionally, the access opening may be square, circular or other shapes, and the size of the access opening may be selected according to actual requirements. Aeration components can include the gas-distributing pipe and the aeration pipe of being connected with the gas-distributing pipe, and the number of aeration pipe can be a plurality ofly, and a plurality of aeration pipes can be "cockscomb structure" or "antenna form" to the hang parts that make things convenient for hang the subassembly and snatch.
According to the maintenance method of the closed sewage treatment lifting and moving aeration device, when the aeration component is maintained, the lifting component is used for lifting the aeration component to the water surface, then the suspension component grabs the aeration component, and the driving component drives the suspension component to move the aeration component to the maintenance port accessory of the aeration tank, so that the maintenance of the aeration component is facilitated, the aeration component does not need to enter the water again manually for maintenance, and the maintenance difficulty of the aeration component is reduced, and time and labor are saved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A closed sewage treatment can promote and remove aeration equipment, its characterized in that includes:
the aeration tank comprises a bottom wall, a side wall intersecting with the bottom wall and a top wall opposite to the bottom wall, wherein the top wall is provided with an access hole;
the aeration component is arranged in the aeration tank;
a lifting assembly connected to the aeration assembly and capable of driving the aeration assembly to reciprocate between the bottom wall and the top wall of the aeration tank;
the suspension assembly is arranged on the top wall of the aeration tank and comprises a driving part and a suspension part, the driving part is connected with the suspension part and can drive the suspension part to move along the top wall, and the suspension part is used for suspending the aeration assembly close to the top wall and moving the aeration assembly to the access opening of the top wall.
2. The closed sewage treatment liftable mobile aeration apparatus according to claim 1, wherein the lifting assembly comprises a guide bar, a pulley block, a connecting member, and a traction part, wherein the guide bar is disposed along a height direction of the aeration tank, the pulley block is slidably connected to the guide bar, the pulley block is connected to the aeration assembly through the connecting member, the traction part is disposed outside the aeration tank, and the traction part can drive the pulley block to move along the guide bar.
3. The enclosed sewage treatment lifting and moving aeration device according to claim 2, wherein the number of said guide rods is two, and said pulley block is two sets of connecting members.
4. The closed sewage treatment liftable mobile aeration apparatus according to claim 2, wherein the lifting assembly comprises a guide rod fixing part, and the guide rod is fixedly connected with the side wall of the aeration tank through the guide rod fixing part.
5. The enclosed sewage treatment liftable mobile aeration apparatus according to claim 1, wherein the driving means comprises a guide rail, a motor, and a driving wheel, wherein the guide rail is connected to the top wall of the aeration tank, the motor is slidably connected with the guide rail through the driving wheel, and the motor drives the driving wheel to perform reciprocating motion along the guide rail.
6. The enclosed sewage treatment liftable mobile aeration apparatus of claim 1, wherein the suspension member comprises a suspension body and two suspension arms disposed opposite to each other on both sides of the suspension body.
7. A maintenance method of a closed sewage treatment lifting mobile aeration device is characterized by comprising the following steps:
lifting an aeration assembly to a predetermined area using a lifting assembly, the lifting assembly being as claimed in any one of claims 1 to 6;
grasping the aeration assembly by a suspension assembly and moving the aeration assembly to an access opening of an aeration tank, the suspension assembly being the suspension assembly of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110893572.7A CN114057306A (en) | 2021-08-04 | 2021-08-04 | Closed sewage treatment lifting mobile aeration device and maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110893572.7A CN114057306A (en) | 2021-08-04 | 2021-08-04 | Closed sewage treatment lifting mobile aeration device and maintenance method |
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| Publication Number | Publication Date |
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| CN114057306A true CN114057306A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110893572.7A Pending CN114057306A (en) | 2021-08-04 | 2021-08-04 | Closed sewage treatment lifting mobile aeration device and maintenance method |
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| Country | Link |
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| CN (1) | CN114057306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115072888A (en) * | 2022-07-06 | 2022-09-20 | 山东恒坤环境工程有限公司 | Sewage treatment aeration equipment and sewage treatment system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060180546A1 (en) * | 2005-02-15 | 2006-08-17 | William L. Stuth, Sr. | Wastewater treatment system and method |
| CN109867369A (en) * | 2019-04-16 | 2019-06-11 | 江苏鑫汇林环境工程有限公司 | One kind can promote suspension cannula type aerator and working method |
-
2021
- 2021-08-04 CN CN202110893572.7A patent/CN114057306A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060180546A1 (en) * | 2005-02-15 | 2006-08-17 | William L. Stuth, Sr. | Wastewater treatment system and method |
| CN109867369A (en) * | 2019-04-16 | 2019-06-11 | 江苏鑫汇林环境工程有限公司 | One kind can promote suspension cannula type aerator and working method |
Non-Patent Citations (1)
| Title |
|---|
| 唐玉斌 等: "《水污染控制工程》", vol. 1, 哈尔滨工业大学出版社, pages: 183 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115072888A (en) * | 2022-07-06 | 2022-09-20 | 山东恒坤环境工程有限公司 | Sewage treatment aeration equipment and sewage treatment system |
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