A sewage treatment agent spraying device for sewage treatment

CN120423644BActive Publication Date: 2026-08-18ZHONGLING ADVANCED (NANJING) ENVIRONMENTAL TECH RES INST CO LTD
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Patent Information

Application Number
CN202510820041.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-19
Publication Date
2026-08-18
Estimated Expiration
2045-06-19

AI Technical Summary

Technical Problem

[0002]污水处理池在处理污水时,通常会采用喷淋的方式来投放药剂,然而污水在处理时表面会存在各类漂浮物,例如存在纤维、颗粒等固态杂物或油污浮沫等漂浮物,在喷淋药剂时,污水表面的漂浮物形成一层物理屏障,从而会阻碍药剂喷淋后与污水的接触,进而会导致药剂喷淋处理污水的效果降低

Benefits of technology

1、本发明在转动体带动三角板和凹形板刮除污水表面漂浮物的同时,转动体表面的喷淋头能够对刮除后的污水喷淋药剂,从而避免污水表面的漂浮物隔离药剂无法接触污水进行混合反应以及避免药剂喷洒时分布不均;并且,转动体两侧的喷淋头分别位于凹形板内部和外部,从而能够分别以射流和水雾状药剂进行喷淋,从而在快速沉降扩散并与刮除漂浮物后的污水快速混合的同时保证扩散范围和均匀性,提高药剂喷淋效果;并且,三角板和凹形板刮除污水表面漂浮物的同时还能够配合撇油器吸附油污,并通过滤体对污水进行过滤。

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Abstract

The present application relates to sewage treatment technical field, specifically a kind of sewage treatment agent spraying device for sewage treatment, including pool body and spraying structure, the spraying structure is rotatably installed in the middle part of pool body, the walkway is fixedly installed at the top of pool body, the spraying structure is installed below walkway, the impurity removal structure is fixedly installed in the front side of the rotating direction of spraying structure, the impurity removal structure is synchronously rotated and scraped off surface impurities in the rotating process of spraying structure, facilitate subsequent spraying structure to spray reagent;The problem that the floating impurities on the surface of sewage affect the contact between the sprayed reagent and sewage is solved.
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Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment agent spraying device. Background Technology

[0002] When treating sewage, wastewater treatment ponds typically use spraying to add chemicals. However, various floating objects, such as fibers, particles, or oil scum, are present on the surface of the sewage during treatment. When the chemicals are sprayed, these floating objects form a physical barrier on the surface of the sewage, which hinders the contact between the sprayed chemicals and the sewage, thus reducing the effectiveness of the chemical spraying in treating the sewage.

[0003] Therefore, the present invention provides a wastewater treatment agent spraying device for wastewater treatment to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that floating impurities on the surface of sewage affect the contact between the sprayed agent and the sewage.

[0005] This invention provides the following technical solution: a wastewater treatment agent spraying device for wastewater treatment, comprising a pool body and a spraying structure. The spraying structure is rotatably installed in the middle of the pool body, a walkway is fixedly installed on the top of the pool body, and the spraying structure is installed below the walkway. A debris removal structure is fixedly installed on the front side of the spraying structure in the direction of rotation. During the rotation of the spraying structure, the debris removal structure rotates synchronously to scrape away debris on the water surface, facilitating the subsequent spraying of the agent by the spraying structure.

[0006] As a preferred embodiment of the present invention, the spray structure includes a first driving body, a longitudinal body, a rotating body, and an extension body. A driving component is fixedly installed in the middle of the walkway, a longitudinal body is fixedly installed in the middle of the pool, a rotating body is rotatably installed above the longitudinal body, a driving component is coaxially fixed above the rotating body, and an extension body is horizontally connected to the surface of the rotating body. Interconnected flow channels are opened inside the longitudinal column, the rotating body, and the extension body, and multiple spray heads with interconnected flow channels are arrayed along the horizontal axis of the extension body.

[0007] As a preferred embodiment of the present invention, the impurity removal structure includes a concave plate and a triangular plate. The concave plate is fixedly installed on the surface of the rotating body in a horizontal direction. The concave plate is located in front of the extension body in the direction of rotation. The triangular plate is fixedly installed on the concave plate away from the rotating body. A filter body is fixedly installed inside the concave plate, and the bottom of the concave plate has a through-groove structure.

[0008] As a preferred embodiment of the present invention, a filter body is fixedly installed inside the concave plate, and a connecting hole is provided at the bottom of the concave plate.

[0009] As a preferred embodiment of the present invention, the concave plate is fixedly mounted on both sides of the extension body in a wrapping manner, and spray heads are fixedly mounted on both sides of the extension body located inside and outside the concave plate.

[0010] As a preferred embodiment of the present invention, a mounting plate is fixedly fixed at intervals inside the concave plate, and a stirring body is rotatably mounted inside the mounting plate. A second driving body is fixedly mounted coaxially on any one of the stirring bodies. Wheels are fixedly mounted on the output end of the second driving body and the surface of the stirring shaft, and connecting parts are installed between adjacent wheels.

[0011] As a preferred embodiment of the present invention, the concave plate has a communication opening on its side wall, one side of the triangular plate is fixedly installed on the surface of the communication opening, and an oil skimmer is fixedly installed on the upper part of the communication opening.

[0012] As a preferred embodiment of the present invention, an antifoaming body is fixedly installed on the surface of the stirring body.

[0013] As a preferred embodiment of the present invention, an annular body is fixedly installed on the inner surface of the pool, and one end of the rotating body, the concave plate and the triangular plate slides above the annular body.

[0014] As a preferred embodiment of the present invention, the filter body is installed at an angle.

[0015] The beneficial effects of this invention are as follows: 1. In this invention, while the rotating body drives the triangular plate and concave plate to scrape off floating debris from the surface of sewage, the spray head on the surface of the rotating body can spray the scraped sewage with a chemical agent. This avoids the floating debris on the sewage surface preventing the chemical agent from contacting the sewage and mixing, and also avoids uneven distribution of the chemical agent during spraying. Furthermore, the spray heads on both sides of the rotating body are located inside and outside the concave plate, respectively, so that the chemical agent can be sprayed in jet and water mist form, respectively. This ensures the diffusion range and uniformity while rapidly settling and spreading the chemical agent and mixing it with the sewage after the floating debris is scraped off, thereby improving the chemical spraying effect. In addition, while the triangular plate and concave plate scrape off the floating debris from the sewage surface, they can also work with the oil skimmer to adsorb oil and filter the sewage through the filter body.

[0016] 2. In this invention, while the rotating body drives the spray head to rotate and spray, and the triangular plate and concave plate scrape away floating matter on the surface of sewage, the stirring body can stir the agent sprayed by the corresponding spray head, thereby increasing the mixing speed of the agent and sewage, and thus improving the reaction effect after the agent is added; and while the stirring body rotates, the defoaming body located at the water surface rotates simultaneously, breaking up the floating matter on the sewage surface to facilitate agent spraying and stirring the agent, while mechanically beating the foam floating on the sewage surface, thereby eliminating the foam on the sewage surface and improving the agent spraying effect. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 3 This is a frontal cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the structure of the impurity removal component of the present invention; Figure 5 This is a side cross-sectional view of the impurity removal component of the present invention; Figure 6 This is a front cross-sectional view of the impurity removal component of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram at point B in the middle.

[0019] In the diagram: 1. Pool body; 11. Walkway; 2. Spray structure; 21. First drive body; 22. Longitudinal body; 23. Rotating body; 24. Extension body; 25. Flow channel; 26. Spray head; 3. Impurity removal structure; 31. Concave plate; 311. Connecting port; 312. Skimmer; 32. Triangular plate; 33. Filter body; 34. Mounting plate; 35. Stirring body; 36. Second drive body; 37. Wheel body; 38. Connecting piece; 4. Defoamer; 5. Annular body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention.

[0023] It should also be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Based on the existing technical problem of floating impurities on the wastewater surface affecting the contact between sprayed agents and wastewater, such as Figures 1 to 7 As shown in the figure, this embodiment of the present disclosure provides a wastewater treatment agent spraying device, including a tank body 1 and a spraying structure. The spraying structure is rotatably installed in the middle of the tank body 1. A walkway 11 is fixedly installed on the top of the tank body 1. The spraying structure is installed below the walkway 11. A debris removal structure 3 is fixedly installed on the front side of the spraying structure in the direction of rotation. During the rotation of the spraying structure, the debris removal structure 3 is driven to rotate synchronously to scrape away debris on the water surface, which is convenient for the subsequent spraying structure to spray the agent.

[0025] like Figures 1 to 3 , Figure 5 and Figure 7 As shown, the spray structure 2 includes a first driving body 21, a longitudinal body 22, a rotating body 23, and an extension body 24. A driving component is fixedly installed in the middle of the walkway 11. A longitudinal body 22 is fixedly installed in the middle of the pool body 1. A rotating body 23 is rotatably installed above the longitudinal body 22. A driving component is coaxially fixed above the rotating body 23. An extension body 24 is horizontally connected to the surface of the rotating body 23. Interconnected flow channels 25 are opened inside the longitudinal column, the rotating body 23, and the extension body 24. Multiple spray heads 26 connected to the flow channels 25 are arrayed along the horizontal axis of the extension body 24.

[0026] During the wastewater treatment process, the first driving body 21 drives the rotating body 23 and the extension body 24 to rotate relative to the longitudinal body 22. At the same time, the flow channels 25 inside the longitudinal body 22, the rotating body 23 and the extension body 24 deliver chemicals. The chemicals are sprayed onto the water surface through the spray head 26 from the flow channels 25. Thus, when the longitudinal body 22, the rotating body 23 and the extension body 24 drive the spray head 26 to rotate around the tank body 1 to spray chemicals, the surface of the tank body 1 can be sprayed evenly.

[0027] It should be noted that the way the rotating body 23 is rotatably installed on the longitudinal body 22 is existing technology, such as the contact dynamic seal in the prior art. The specific rotatable installation method will not be described in detail.

[0028] like Figure 2 , Figure 4 and Figure 5 As shown, the impurity removal structure 3 includes a concave plate 31 and a triangular plate 32. The concave plate 31 is fixedly installed on the surface of the rotating body 23 in the horizontal direction. The concave plate 31 is located in front of the extension body 24 in the rotation direction. The triangular plate 32 is fixedly installed on the concave plate 31 away from the rotating body 23. A filter body 33 is fixedly installed inside the concave plate 31. The bottom of the concave plate 31 is a through groove structure communicating with the inside of the pool body 1.

[0029] During the spraying process of the rotating body 23, the triangular plate 32 rotates and introduces the surface portion of the sewage in the pool 1 towards the concave plate 31 through its own inclined surface. This allows various floating impurities on the surface of the sewage to be introduced into the concave plate 31 for collection, thereby keeping the water surface clean and preventing impurities from floating and blocking the spraying of the agent, which in turn helps to improve the spraying effect of the agent.

[0030] like Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, a filter body 33 is fixedly installed inside the concave plate 31, and the bottom of the concave plate 31 is connected to the pool body 1.

[0031] After the portion of the sewage containing various floating objects on the surface of the wastewater in the pool 1 is introduced into the concave plate 31, the sewage and floating objects pass through the filter body 33, thereby filtering out the solid impurities in the floating objects. The remaining sewage then flows back into the pool 1 through the connecting hole, preventing solid impurities from floating and affecting the effect of the chemical spraying. This is conducive to the chemical dissolving into the sewage and spreading, and helps to improve the chemical spraying effect.

[0032] like Figure 5 As shown, the concave plate 31 is fixedly installed on one side of the extension body 24, and spray heads 26 are fixedly installed on both sides of the extension body 24, inside and outside the concave plate 31.

[0033] While the rotating body 23 drives the extension body 24 and the spray head 26 to rotate and spray, and the triangular plate 32 and the concave plate 31 scrape off the floating objects on the surface of the sewage, the spray heads 26 on both sides of the extension body 24 are located inside and outside the concave plate 31, respectively. The spray head 26 located inside the concave plate 31 sprays out a continuous columnar water flow and can come into contact with the sewage falling through the filter body 33 during spraying. This allows the continuous columnar water flow to enter the sewage and quickly settle and diffuse, and mix rapidly with the filtered sewage that is free of impurities, which is beneficial to improving the diffusion speed of the agent and the spraying effect. The spray head 26 located outside the concave plate 31 sprays atomized agent towards the surface of the sewage, thereby expanding the spraying range of the agent and achieving uniform spraying.

[0034] It should be noted that the spray head 26 located in the concave plate 31 adopts the direct-shot nozzle of the prior art, while the nozzle located outside the concave plate 31 adopts the pressure nozzle of the prior art. Furthermore, it should be specifically noted that both the direct-shot nozzle and the pressure nozzle can be driven by the flow channel 25 and the high-pressure pump, and the pressure is maintained at the pressure threshold of the pressure nozzle, which is maintained at 20 MPa in this embodiment. In addition, branch pipes can be fixedly extended in the extension body 24 and the flow channel 25, and pressure reducing valves can be fixedly installed in the branch pipes to ensure the stable operating pressure of the pressure nozzles.

[0035] It should also be noted that the spray head 26 located inside the concave plate 31 can also use a pressure nozzle to spray a mist of medicine, so as to better contact and mix with the sewage falling through the filter body 33 and evenly enter the sewage for diffusion, which is beneficial to improve the uniformity of diffusion.

[0036] like Figure 5 and Figure 7 As shown, mounting plates 34 are fixedly fixed at intervals inside the concave plate 31. A stirring body 35 is rotatably mounted inside the mounting plate 34. A second driving body 36 is fixedly mounted coaxially on any one of the stirring bodies 35. A wheel 37 is fixedly mounted on the output end of the second driving body 36 and the surface of the stirring shaft. A connecting piece 38 is installed between adjacent wheels 37.

[0037] While the rotating body 23 drives the extension body 24 and the spray head 26 to rotate and spray, and the triangular plate 32 and the concave plate 31 scrape off the floating objects on the surface of the sewage, the second driving body 36 drives the other wheels 37 to rotate synchronously through the wheel body 37 and the connecting piece 38, thereby driving multiple stirring bodies 35 to rotate and stir. In this way, after the spray head 26 sprays the agent, the stirring body 35 stirs the agent sprayed by the spray head 26, thereby increasing the mixing speed of the agent and the sewage, and thus improving the reaction effect after the agent is added.

[0038] like Figure 4 , Figure 5 and Figure 7As shown, the concave plate 31 has a connecting opening 311 on its side wall. One side of the triangular plate 32 is fixedly installed on the surface of the connecting opening 311, and an oil skimmer 312 is fixedly installed on the upper part of the connecting opening 311. During the process of the triangular plate 32 scraping the water flow on the surface of the sewage into the concave plate 31 to filter floating objects, the oil skimmer 312 located above the connecting opening 311 can adsorb the oil on the surface of the sewage, thereby preventing the oil from affecting the spraying effect of the agent.

[0039] It should be noted that the oil skimmer 312 can be any structure in the prior art that can absorb oil stains, such as an oil-absorbing felt.

[0040] like Figure 2 , Figure 5 and Figure 7 As shown, a defoamer 4 is fixedly installed on the surface of the stirring body 35, and the defoamer 4 is located at the water surface. During the rotation of the stirring body 35, the defoamer 4 located at the water surface can rotate and mechanically beat the foam on the water surface, and use shear force and impact force to break the bubbles, thereby avoiding excessive foam on the sewage surface from affecting the spraying of the agent.

[0041] It should be noted that the defoaming body 4 can be a rotary defoaming paddle as described in the prior art.

[0042] like Figure 1 As shown, an annular body 5 is fixedly installed on the inner surface of the pool body 1. One end of the rotating body 23, the concave plate 31, and the triangular plate 32 slides above the annular body 5. The annular body 5 can support one end of the rotating body 23, the concave plate 31, and the triangular plate 32, thereby facilitating stable rotation of the rotating body 23, the concave plate 31, and the triangular plate 32. It should be noted that multiple ball bearings can be installed on the surface of the annular body 5 to facilitate the rotation of the rotating body 23, the concave plate 31, and the triangular plate 32.

[0043] like Figure 6 and Figure 7 As shown, the filter body 33 is installed at an angle, with the end of the filter body 33 closest to the pool body 1 being the horizontal lower end. The angled installation of the filter body 33 can guide the filtered floating matter, so that during the rotation of the concave plate 31, the floating matter is caused to converge towards the horizontal lower end by the combination of the angle of the filter body 33 itself and centrifugal force, thereby collecting the floating matter for subsequent discharge.

[0044] During the process of spraying chemicals for wastewater treatment: the first driving body 21 drives the rotating body 23 to rotate relative to the longitudinal body 22. At the same time, the rotating body 23 also drives the triangular plate 32 and the concave plate 31 to rotate, so that the triangular plate 32 scrapes the floating objects on the surface of the wastewater into the concave plate 31 and filters them through the filter body 33. In addition, as the wastewater enters the concave plate 31 from the triangular plate 32, it passes through the connecting port 311, and the oil skimmer 312 above the connecting port 311 adsorbs the oil on the surface of the wastewater. Simultaneously, the flow channels 25 inside the longitudinal body 22, the rotating body 23, and the extension body 24 deliver the agent and spray it onto the water surface through the spray head 26. Thus, while the rotating body 23 drives the triangular plate 32 and the concave plate 31 to rotate and scrape off the floating objects on the water surface, the rotating body 23 drives the extension body 24 and the spray head 26 to rotate around the pool body 1 to spray the agent. This allows the floating objects on the surface of the sewage to be scraped off first and then the agent to be sprayed, avoiding the floating objects on the surface of the sewage from preventing the agent from contacting the sewage for mixing and reaction, and avoiding uneven distribution of the agent during spraying.

[0045] Meanwhile, the spray heads 26 on both sides of the extension body 24 are located inside and outside the concave plate 31, respectively. This allows the spray heads 26 inside the concave plate 31 to spray a continuous columnar water stream into the sewage, where it quickly settles and diffuses, mixing rapidly with the filtered, impurity-free sewage. This improves the diffusion rate of the agent and the spraying effect. The spray heads 26 outside the concave plate 31, on the other hand, deliver atomized agents towards the surface of the sewage, thus expanding the spraying range and achieving uniform spraying. The rapid settling and mixing of the jet combined with atomized spraying enhances the spraying range and uniformity, thereby improving the spraying effect of the agent.

[0046] While the rotating body 23 drives the extension body 24 and the spray head 26 to rotate and spray, and the triangular plate 32 and the concave plate 31 scrape away floating debris on the surface of the sewage, the second driving body 36 drives the other wheels 37 to rotate synchronously through the wheel body 37 and the connecting piece 38. This drives multiple stirring bodies 35 to rotate and stir, so that after the spray head 26 sprays the agent, the stirring body 35 stirs the agent sprayed by the spray head 26, thereby increasing the mixing speed of the agent and the sewage, and thus improving the reaction effect after the agent is added. At the same time as the stirring body 35 rotates, the defoaming body 4 located at the water surface rotates synchronously. While breaking up the floating debris on the sewage surface to facilitate agent spraying and stirring the agent, it also mechanically beats the foam floating on the sewage surface, thereby eliminating the foam on the sewage surface and improving the agent spraying effect.

[0047] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment agent spraying device for wastewater treatment, comprising a tank (1) and a spraying structure, wherein the spraying structure is rotatably mounted in the middle of the tank (1), characterized in that: A walkway (11) is fixedly installed on the top of the pool body (1), and a spraying structure is installed below the walkway (11). A debris removal structure (3) is fixedly installed on the front side of the spraying structure in the direction of rotation. During the rotation of the spraying structure, the debris removal structure (3) is driven to rotate synchronously to scrape away debris on the water surface, which is convenient for the subsequent spraying structure to spray the agent. The spraying structure (2) includes a first driving body (21), a longitudinal body (22), a rotating body (23), and an extension body (24). The first driving body (21) is fixedly installed in the middle of the walkway (11). The longitudinal body (22) is fixedly installed in the middle of the pool body (1). The rotating body (23) is rotatably installed above the longitudinal body (22). The first driving body (21) is coaxially fixed above the rotating body (23). The extension body (24) is horizontally connected to the surface of the rotating body (23). The longitudinal body (22), the rotating body (23), and the extension body (24) have interconnected flow channels (25) inside. The extension body (24) has multiple spray heads (26) connected to the flow channels (25) arranged along the horizontal axis. The impurity removal structure (3) includes a concave plate (31) and a triangular plate (32). The concave plate (31) is fixedly installed on the surface of the rotating body (23) in the horizontal direction. The concave plate (31) is located in front of the extension body (24) in the rotation direction. The triangular plate (32) is fixedly installed on the concave plate (31) away from the rotating body (23). A filter body (33) is fixedly installed inside the concave plate (31). The bottom of the concave plate (31) is a through groove structure. A filter body (33) is fixedly installed inside the concave plate (31), and a connecting hole is provided at the bottom of the concave plate (31); The concave plate (31) is wrapped and fixedly installed on both sides of the extension body (24), and the extension body (24) is fixedly installed with spray heads (26) on both sides inside and outside the concave plate (31). The concave plate (31) is fixed with a mounting plate (34) at intervals. The mounting plate (34) is rotatably mounted with a stirring body (35). Any one of the stirring bodies (35) is fixedly mounted with a second driving body (36) on the same axis. The output end of the second driving body (36) and the surface of the stirring body (35) are respectively fixedly mounted with a wheel (37). A connecting piece (38) is installed between adjacent wheels (37). The concave plate (31) has a connecting opening (311) on its side wall. One side of the triangular plate (32) is fixedly installed on the surface of the connecting opening (311). An oil skimmer (312) is fixedly installed on the upper part of the connecting opening (311). The surface of the stirring body (35) is fixedly fitted with a defoaming body (4); An annular body (5) is fixedly installed on the inner surface of the pool body (1), and one end of the rotating body (23), the concave plate (31) and the triangular plate (32) slides above the annular body (5).

2. The wastewater treatment agent spraying device for wastewater treatment according to claim 1, characterized in that: The filter element (33) is installed at an angle.

Citation Information

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