Sewage treatment plant

Abstract

The sewage treatment device comprises a first barrel wall, a second barrel wall, a third barrel wall and a liquid inlet unit which are sequentially sleeved; the first barrel wall is configured to enclose a first chamber, the second barrel wall and the first barrel wall enclose a transition chamber, and the third barrel wall and the second barrel wall enclose a second chamber; the first chamber is communicated with the transition chamber through a first through hole, and liquid in the transition chamber flows into the second chamber through a second through hole; the liquid inlet unit is configured to be communicated with the bottom of the first chamber and the second chamber respectively, and configured to supply liquid to the bottom of the first chamber and the second chamber respectively. The sewage treatment device of the present disclosure can effectively improve the mass transfer efficiency of sewage by the integrated chamber nesting design; the transition chamber can change the flow direction of the liquid, avoid the formation of short flow, reduce the impact load in sewage treatment, and thus improve the reaction stability and sludge circulation effect.

Description

Technical Field

[0001] The embodiments in this specification relate to the field of wastewater treatment technology, specifically to a wastewater treatment device. Background Technology

[0002] Anaerobic ammonia oxidation (AAO) is a novel autotrophic biological nitrogen removal technology. The two-stage AAO process separates short-cut nitrification and AAO into two phases, offering advantages such as no need for external carbon sources, low sludge production, and reduced aeration energy consumption. Conventional two-stage processes require two independent reaction tanks. While some integrated two-stage processes combine the two stages into a single unit, their construction is complex, resulting in poor sludge-water contact efficiency and mediocre activated sludge recycling.

[0003] Reactor structure is a crucial factor influencing biological nitrogen removal; different structures directly affect mass transfer efficiency, nitrogen removal efficiency, and stability by creating differentiated flow fields. With increasingly stringent emission standards and rising demands for resource utilization, developing efficient and synergistic nitrogen removal technologies has become a focus of the industry, urgently requiring faster and more reliable solutions. Utility Model Content

[0004] In view of this, in order to solve the problems existing in the prior art, this disclosure provides a wastewater treatment device.

[0005] According to a first aspect of this disclosure, a wastewater treatment apparatus is provided, comprising:

[0006] The first cylindrical wall is configured to form a first chamber, and a first through hole is provided in the upper part of the first cylindrical wall in the thickness direction.

[0007] The second cylindrical wall is sleeved on the outside of the first cylindrical wall and is configured to form a transition chamber with the first cylindrical wall; the first chamber is configured to communicate with the transition chamber through the first through hole, and the liquid in the upper part of the first chamber is configured to flow into the transition chamber through the first through hole; a second through hole is provided in the lower part of the second cylindrical wall.

[0008] The third cylindrical wall is sleeved on the outside of the second cylindrical wall and is configured to form a second chamber with the second cylindrical wall; the transition chamber is configured to communicate with the second chamber through a second through hole, and the liquid in the transition chamber is configured to flow into the second chamber through the second through hole;

[0009] The liquid inlet unit is configured to communicate with the bottom of the first chamber and the second chamber respectively, and is configured to supply liquid from the bottom to the bottom of the first chamber and the second chamber respectively.

[0010] In one embodiment of this disclosure, the liquid inlet unit includes a liquid inlet chamber surrounded by a liquid inlet wall and a liquid inlet communicating with the liquid inlet chamber. The liquid inlet chamber is configured to communicate with the bottom openings of the first chamber and the second chamber.

[0011] In one embodiment of this disclosure, the inlet chamber is configured to completely cover the bottom regions of the first chamber and the second chamber, with a portion of the liquid located in the inlet chamber configured to enter the first chamber and a portion of the liquid configured to enter the second chamber.

[0012] In one embodiment of this disclosure, the inlet wall is configured as a cone, and the inlet port is configured to communicate with the center of the inlet wall.

[0013] In one embodiment of this disclosure, the wastewater treatment device further includes an aeration unit, which includes an aeration disc and an aeration pipe. The aeration disc is disposed at the bottom of the first chamber and configured to aerate the first chamber. One end of the aeration pipe is connected to the aeration disc, and the other end is configured to extend to the outside of the wastewater treatment device for connection with an external air source.

[0014] In one embodiment of this disclosure, the wastewater treatment device further includes a stirring unit, which includes a paddle structure, a stirring rod, and a stirring motor. The paddle structure is disposed on the stirring rod, and the stirring rod extends upward along the first chamber to connect with the stirring motor located at the top of the wastewater treatment device.

[0015] In one embodiment of this disclosure, the wastewater treatment device further includes a constant temperature water bath layer; the constant temperature water bath layer covers the outer side of the third cylinder wall, and a circulating water passage is provided inside the constant temperature water bath layer, the circulating water passage having a constant temperature layer inlet and a constant temperature layer outlet.

[0016] In one embodiment of this disclosure, a plurality of first through holes are provided, and the plurality of first through holes are configured to be distributed in a circumferential direction on the upper part of the first cylinder wall, and a first screen is covered on the first through holes;

[0017] And / or,

[0018] Multiple second through holes are provided, and the multiple second through holes are configured to be distributed in the circumferential direction of the lower part of the second cylinder wall, and the second through holes are covered with a second screen.

[0019] In one embodiment of this disclosure, the bottom of the first chamber is configured to have a first sludge discharge port communicating with the outside of the wastewater treatment device, the first sludge discharge port being configured to open when the wastewater treatment device is in a shutdown state to discharge sludge;

[0020] And / or,

[0021] In one embodiment of this disclosure, the bottom of the second chamber is configured to have a second sludge discharge port communicating with the outside of the wastewater treatment device, the second sludge discharge port being configured to open when the wastewater treatment device is in a powered-off state to discharge sludge.

[0022] In one embodiment of this disclosure, the wastewater treatment apparatus further includes an outlet pipe configured to communicate with the upper part of the second chamber to discharge treated liquid.

[0023] One beneficial effect of this disclosure is that the first chamber, transition chamber, and second chamber are nested together in sequence. The first and second chambers share a single inlet unit. Wastewater enters from the bottom of both the first and second chambers through the inlet unit, undergoes appropriate treatment in the first chamber, and then flows into the transition chamber through the first through-hole. From there, it flows into the bottom of the second chamber through the second through-hole, where it mixes with the raw wastewater from the inlet unit and is further treated. This integrated, nested chamber design effectively improves wastewater mass transfer efficiency. The transition chamber changes the liquid flow direction, preventing short-circuiting and reducing shock loads in wastewater treatment, thereby improving reaction stability and sludge recycling efficiency. The shared inlet unit at the bottom of the first and second chambers creates an upward flow field within the chambers, enhancing sludge-water contact efficiency and strengthening the wastewater treatment device's resistance to hydraulic shock.

[0024] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0026] Figure 1 This is a cross-sectional schematic diagram of the wastewater treatment device provided in the embodiments of this disclosure;

[0027] Figure 2 This is a schematic diagram of the structure of the first cylindrical wall of the wastewater treatment device provided in the embodiments of this disclosure;

[0028] Figure 3 This is a schematic diagram of the structure of the second cylindrical wall of the wastewater treatment device provided in the embodiments of this disclosure;

[0029] Figure 4 This is a schematic diagram of the structure of the third cylindrical wall and the constant temperature water bath layer of the sewage treatment device provided in the embodiments of this disclosure.

[0030] Figures 1 to 4The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0031] 1. First cylinder wall; 11. First chamber; 12. First through hole; 13. First sludge discharge port; 2. Second cylinder wall; 21. Transition chamber; 22. Second through hole; 3. Third cylinder wall; 31. Second chamber; 32. Second sludge discharge port; 33. Liquid outlet pipe; 34. Top plate; 35. Flange connection; 36. Sampling port; 4. Liquid inlet unit; 41. Liquid inlet wall; 42. Liquid inlet chamber; 43. Liquid inlet; 5. Aeration unit; 51. Aeration disc; 52. Aeration pipe; 6. Stirring unit; 61. Paddle structure; 62. Stirring rod; 63. Stirring motor; 7. Constant temperature water bath layer; 71. Constant temperature layer inlet; 72. Constant temperature layer outlet. Detailed Implementation

[0032] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless specifically stated otherwise, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] Numerous specific details are set forth in the following description to provide a full understanding of this disclosure. However, this disclosure can be implemented in many other ways than those described herein, and similar extensions can be made by those skilled in the art without departing from the spirit of this disclosure; therefore, this disclosure is not limited to the specific implementations disclosed below. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0034] The terminology used in one or more embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this disclosure. The singular forms “a,” “the,” and “the” as used in one or more embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this disclosure refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this disclosure, and similarly, second may also be referred to as first. Depending on the context, the word “if” as used herein may be interpreted as “when”, “in response to a determination”, or “upper”, “lower”, “front”, “back”, “left”, “right”, etc., are used only to indicate the relative positional relationship between related parts, and not to define the absolute position of these related parts. In this document, “equal”, “same”, etc., are not strict mathematical and / or geometric limitations, and also include errors that are understandable to those skilled in the art and permissible in manufacturing or use. Unless otherwise stated, numerical ranges in this document include not only the entire range within its two endpoints, but also several sub-ranges contained therein.

[0036] This disclosure provides a wastewater treatment device, comprising: a first cylindrical wall, a second cylindrical wall, a third cylindrical wall, and a liquid inlet unit. The first cylindrical wall forms a first chamber, and a plurality of first through holes are arranged circumferentially on the upper part of the first cylindrical wall. The second cylindrical wall is sleeved on the outside of the first cylindrical wall, forming a transition chamber with the first cylindrical wall, and a plurality of second through holes are arranged circumferentially on the lower part of the second cylindrical wall. The third cylindrical wall is sleeved on the outside of the second cylindrical wall, forming a second chamber with the second cylindrical wall. The transition chamber is connected to the first chamber through the first through holes and to the second chamber through the second through holes. The first chamber and the second chamber share a single liquid inlet unit, which is connected to the bottom openings of the first chamber and the second chamber. The wastewater to be treated enters the first chamber and the second chamber from the bottom, enters the transition chamber from the first chamber through the first through holes, and then flows into the second chamber from the transition chamber through the second through holes.

[0037] One beneficial effect of this disclosure is that the first chamber, transition chamber, and second chamber are nested together in sequence. The first and second chambers share a single inlet unit. Wastewater enters from the bottom of both the first and second chambers through the inlet unit, undergoes appropriate treatment in the first chamber, and then flows into the transition chamber through the first through-hole. From there, it flows into the bottom of the second chamber through the second through-hole, where it mixes with the raw wastewater from the inlet unit and is further treated. This integrated, nested chamber design effectively improves wastewater mass transfer efficiency. The transition chamber changes the liquid flow direction, preventing short-circuiting and reducing shock loads in wastewater treatment, thereby improving reaction stability and sludge recycling efficiency. The shared inlet unit at the bottom of the first and second chambers creates an upward flow field within the chambers, enhancing sludge-water contact efficiency and strengthening the wastewater treatment device's resistance to hydraulic shock.

[0038] For ease of understanding, specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, this disclosure provides a wastewater treatment device, including: a first cylindrical wall 1, a second cylindrical wall 2, and a third cylindrical wall 3. The first cylindrical wall 1 forms a first chamber 11, the second cylindrical wall 2 is fitted outside the first cylindrical wall 1, forming a transition chamber 21 with the first cylindrical wall 1, and the third cylindrical wall 3 is fitted outside the second cylindrical wall 2, forming a second chamber 31 with the second cylindrical wall 2. The shape formed by the first cylindrical wall 1, the second cylindrical wall 2, and the third cylindrical wall 3 can be a cylinder, a square cylinder, or other shapes, and is not specifically limited. In this embodiment, a cylinder is preferred. The first cylindrical wall 1, the second cylindrical wall 2, and the third cylindrical wall 3 are fitted at intervals, and the interval between adjacent cylindrical walls is set according to process requirements. In this embodiment, they are preferably fitted coaxially at intervals, that is, the distance between adjacent cylindrical walls is equal everywhere; and the heights of the first cylindrical wall 1, the second cylindrical wall 2, and the third cylindrical wall 3 are the same. In one embodiment of this disclosure, the first chamber 11, the transition chamber 21, and the second chamber 31 are arranged in a coaxial nested structure from the inside out. The second chamber 31 may contain activated sludge and biological packing material. Various microorganisms can adhere to the activated sludge and biological packing material, which can decompose organic matter, nitrogen, phosphorus, and other pollutants in the wastewater, purifying the water quality to meet discharge standards. No limitations are imposed here. The transition chamber 21 is located between the first chamber 11 and the second chamber 31, forming a transition area.

[0040] In one specific embodiment of this disclosure, such as Figure 1 As shown, the wastewater treatment device provided in this disclosure is suitable for integrated biological denitrification based on a two-stage anaerobic ammonia oxidation process. This two-stage anaerobic ammonia oxidation process is a novel autotrophic biological denitrification technology that separates nitrification and anaerobic ammonia oxidation into two stages. By physically separating these two key steps, reaction conditions (such as dissolved oxygen (DO) and pH) can be independently optimized, reducing bacterial competition and resulting in high operational stability. The first stage of the two-stage process oxidizes approximately 50% of the ammonia nitrogen in the wastewater into nitrite nitrogen under the action of ammonia-oxidizing bacteria (AOB), forming a mixture with an ammonia nitrogen to nitrite nitrogen ratio of approximately 1:1, meeting the influent requirements of the anaerobic ammonia oxidation process. The second stage utilizes anaerobic ammonia-oxidizing bacteria (AnAOB) to directly convert ammonia nitrogen and nitrite nitrogen into nitrogen gas.

[0041] Specifically, short-range nitrification occurs in the ammonia-oxidizing bacteria (AOB) in the first chamber 11; the second chamber 31 is filled with activated sludge and biological packing material loaded with anaerobic ammonia-oxidizing bacteria (AnAOB) to construct an anaerobic ammonia oxidation reaction zone.

[0042] like Figure 1As shown, the upper part of the first cylindrical wall 1 is provided with a first through hole 12 penetrating its thickness direction. The first chamber 11 is connected to the transition chamber 21 through the first through hole 12. The liquid in the upper part of the first chamber 11 flows into the transition chamber 21 through the first through hole 12. Specifically, the inner wall of the first cylindrical wall 1 defines the first chamber 11. Figure 1 From the perspective shown, a first through hole 12 is machined in the radial direction in the upper circumferential region of the first cylinder wall 1. This hole penetrates the wall thickness of the first cylinder wall 1. Typically, the first through hole 12 is designed as a circumferentially evenly distributed array or a group of holes arranged at a specific angle to control the flow rate and flow pattern. The transition chamber 21 is a semi-sealed annular region that is connected to other chambers through the through hole structure. Due to the axial height difference, when the liquid level accumulated in the first chamber 11 rises above the lower edge of the first through hole 12 under the action of gravity, the liquid enters the transition chamber 21 through the first through hole 12. Meanwhile, a second through hole 22 is provided at the lower part of the second cylinder wall 2. The transition chamber 21 is connected to the second chamber 31 through the second through hole 22. The liquid in the transition chamber 21 flows into the second chamber 31 through the second through hole 22. That is, in the lower region of the second cylinder wall 2, a second through hole 22 is also provided in the radial direction. The second cylinder wall 2 is usually coaxial with the first cylinder wall 1. Its bottom is positioned by axial displacement limiting structures such as flanges, which are not specifically limited. The inner wall of the second cylinder wall 2 defines the boundary of the transition chamber 21. Under the combined action of liquid level, gravity and internal pressure, the liquid inside the transition chamber 21 also flows into the second chamber 31 enclosed by the third cylinder wall 3 through the second through hole 22.

[0043] like Figure 1 As shown, the bottom of the transition chamber 21 is a closed structure. After sewage enters the first chamber 11, it undergoes decomposition by microorganisms in the activated sludge and biological packing material within the first chamber 11. The primary treated liquid flows into the transition chamber 21 through the first through hole 12 located on the upper part of the first cylinder wall 1. Under the action of gravity, the liquid forms a downward flow and then flows into the second chamber 31 through the second through hole 22 located on the lower part of the second cylinder wall 2. Thus, the main structure of the sewage treatment device adopts a three-stage axial concentric cylinder wall nesting design, which can achieve series flow of fluid according to the path of first chamber 11 → transition chamber 21 → second chamber 31. The annular layout of the transition chamber 21 physically isolates the first chamber 11 and the second chamber 31, while ensuring that the fluid is treated step by step according to the preset path, thereby improving the reaction efficiency. The existence of the transition chamber 21 changes the inlet direction, allowing the liquid that has been preliminarily purified in the first chamber 11 to enter from the bottom of the second chamber 31 through the transition chamber 21. On the other hand, it avoids the formation of short-circuiting, reduces the shock load in wastewater treatment, prevents the concentration of pollutants in the inlet from soaring, and avoids the phenomenon of imbalance in the sludge microbial community. It also improves the wastewater treatment device's ability to withstand liquid shock and increases the buffer zone.

[0044] Continue to refer to Figure 1 This disclosure provides a wastewater treatment device that also includes an inlet unit 4. The inlet unit 4 is configured to communicate with the bottoms of the first chamber 11 and the second chamber 31, respectively, and is configured to supply liquid from the bottom to the bottoms of the first chamber 11 and the second chamber 31, respectively. The inlet unit 4 is located in the lower part of the core structure of the device and serves as an independent fluid supply module. This bottom-inlet method creates an upward flow field (upflow) in the first chamber 11 and the second chamber 31, which can effectively enhance the sludge-water contact efficiency. When the treated wastewater in the first chamber 11 flows into the bottom of the second chamber 31 through the transition chamber 21, it mixes with the original wastewater from the inlet unit 4 and together forms an upflow in the second chamber 31, so that an anaerobic ammonia oxidation reaction zone can occur in the second chamber 31.

[0045] One beneficial effect of this disclosure is that the first chamber, transition chamber, and second chamber are nested together in sequence. The first and second chambers share a single inlet unit. Wastewater enters from the bottom of both the first and second chambers through the inlet unit, undergoes appropriate treatment in the first chamber, and then flows into the transition chamber through the first through-hole. From there, it flows into the bottom of the second chamber through the second through-hole, where it mixes with the raw wastewater from the inlet unit and is further treated. This integrated, nested chamber design effectively improves wastewater mass transfer efficiency. The transition chamber changes the liquid flow direction, preventing short-circuiting and reducing shock loads in wastewater treatment, thereby improving reaction stability and sludge recycling efficiency. The shared inlet unit at the bottom of the first and second chambers creates an upward flow field within the chambers, enhancing sludge-water contact efficiency and strengthening the wastewater treatment device's resistance to hydraulic shock.

[0046] In one embodiment of this disclosure, the liquid inlet unit 4 includes an inlet chamber 42 enclosed by an inlet wall 41, and an inlet 43 communicating with the inlet chamber 42. The inlet chamber 42 is configured to communicate with the bottom openings of the first chamber 11 and the second chamber 31. Wastewater flows into the inlet chamber 42 from the inlet 43 and then flows to the first chamber 11 and the second chamber 31 respectively. That is, part of the wastewater in the inlet chamber 42 enters the first chamber 11 to undergo short-range nitrification; part of the wastewater enters the second chamber 31 and mixes with the wastewater treated in the first chamber 11 to undergo anaerobic ammonium oxidation.

[0047] In one specific embodiment of this disclosure, the inlet chamber 42 is configured to completely cover the bottom regions of the first chamber 11 and the second chamber 31. A portion of the liquid located within the inlet chamber 42 is configured to enter the first chamber 11, and a portion of the liquid is configured to enter the second chamber 31, thereby distributing the waste liquid to the two chambers. (See reference...) Figure 1The inlet chamber 42 is located at the bottom of the first chamber and the second chamber, and the orthographic projection of the first chamber in the height direction is within the projection range of the inlet chamber 42, and the orthographic projection of the second chamber in the height direction is also within the projection range of the inlet chamber 42. The bottoms of the first chamber 11 and the second chamber 31 have openings to communicate with the inlet chamber 42. In one embodiment of this disclosure, the bottoms of the first chamber 11 and the second chamber 31 are constructed with a plurality of uniformly arranged inlet holes. This uniform hole arrangement design aims to ensure more uniform liquid inflow, effectively reduce local hydraulic impact, and avoid excessively high local flow velocities that could erode the biofilm.

[0048] In one embodiment of this disclosure, the inlet wall 41 is configured as a cone, and the inlet port 43 is configured to communicate with the center of the inlet wall 41, as shown in the reference. Figure 1 The inlet wall 41 forms a conical or frustum-shaped conical structure, which can also be understood as the inner diameter of the inlet chamber 42 gradually decreasing from top to bottom. The inlet port 43 is connected to the center of the bottom of the inlet chamber 42. This design is conducive to the natural diffusion of fluid in the conical cavity and prevents the formation of flow dead zones.

[0049] In the integrated biological denitrification process based on a two-stage anaerobic ammonia oxidation process, refer to Figure 1 The first chamber 11 receives liquid from the bottom. About 50% of the ammonia nitrogen in the wastewater to be treated is oxidized to nitrite nitrogen by ammonia-oxidizing bacteria (AOB) in the first chamber 11, and a short-range nitrification reaction occurs, forming a mixed liquid with an ammonia nitrogen to nitrosamine ratio of 1:1, thereby meeting the liquid inlet requirements of the anaerobic ammonia oxidation process.

[0050] The ammonia nitrogen to nitrosamine mixture in the first chamber 11, with a 1:1 ratio, flows into the transition chamber 21 through the first through-hole 12. Within the transition chamber 21, gravity causes a downward flow. The bottom of the transition chamber 21 is closed, allowing the liquid to flow into the second chamber 31 through the second through-hole 22, where it mixes with the wastewater entering from the bottom of the second chamber 31, ensuring a high nitrogen removal rate. Anaerobic ammonia-oxidizing bacteria (AnAOB) in the second chamber 31 convert the ammonia nitrogen and nitrosamine nitrogen in the mixture into nitrogen gas, undergoing an anaerobic ammonia oxidation reaction to purify the nitrogen in the wastewater.

[0051] In one embodiment of this disclosure, such as Figure 1 As shown, it also includes an aeration unit 5, which includes an aeration disc 51 and an aeration pipe 52. The aeration disc 51 is disposed at the bottom of the first chamber 11 and configured to aerate the first chamber 11. One end of the aeration pipe 52 is connected to the aeration disc 51, and the other end is configured to extend to the outside of the wastewater treatment device for connection with an external air source. Specifically, as... Figure 1As shown, the aeration disc 51 is placed at the bottom of the first chamber 11 and aerates the first chamber 11 along the axial direction (from bottom to top) to further enhance the turbulent mixing and contact efficiency between the reaction media. Simultaneously, it provides the necessary dissolved oxygen supply for the metabolic activities of the ammonia-oxidizing bacteria (AOB) attached to the activated sludge and biological packing material inside the first chamber 11, achieving a gradient distribution of dissolved oxygen and regulating the proportion of gas phase components within the first chamber 11. One end of the aeration pipe 52 is connected to the interface of the aeration disc 51 inside the first chamber 11, while the other end extends to the outside of the wastewater treatment device, connecting to an external air supply system.

[0052] In one embodiment of this disclosure, the wastewater treatment device further includes a stirring unit 6. The stirring unit 6 includes a paddle structure 61, a stirring rod 62, and a stirring motor 63. The paddle structure 61 is mounted on the stirring rod 62, which extends upward along the first chamber 11 to connect with the stirring motor 63 located at the top of the wastewater treatment device. Specifically, as... Figure 1 As shown, the impeller structure 61 is mounted on the stirring rod 62, and at least one set of impeller structures 61 is rigidly mounted on the stirring rod 62. The stirring rod 62 extends axially along the first chamber 11 and upwards to connect with the stirring motor 63 located at the top of the wastewater treatment device. The stirring unit 6 is arranged in the central area inside the first chamber 11. Driven by the stirring motor 63, it rotates at high speed, exerting strong shear and axial thrust on the reaction media (activated sludge, biological filler, and wastewater) in the chamber to achieve efficient turbulent mixing of multiphase substances, effectively breaking the concentration gradient and promoting full contact and mass transfer between sludge, water, and filler, preventing the deposition of biological filler and improving mass transfer efficiency, thus optimizing the purification reaction efficiency.

[0053] In one embodiment of this disclosure, the wastewater treatment device is provided with a top plate 34 to achieve overall sealing. The top plate 34 is fixed to the top of the device via a flange connection 35, which not only serves for sealing but also has a radial positioning function, ensuring that the top plate 34 accurately covers and completely seals the top openings of the first chamber 11, the transition chamber 21, and the second chamber 31. A stirring motor 63 is mounted externally above the top plate 34 and connected to a stirring rod 62 located inside the first chamber 11.

[0054] In one embodiment of this disclosure, a constant temperature water bath layer 7 is further included. The constant temperature water bath layer 7 covers the outer side of the third cylinder wall 3, and a circulating water passage is provided inside the constant temperature water bath layer 7. The constant temperature water bath layer 7 has a constant temperature layer inlet 71 and a constant temperature layer outlet 72. Specifically, as shown... Figure 1 and Figure 4As shown, the wastewater treatment device is equipped with a constant temperature water bath layer 7. The constant temperature water bath layer 7 is wrapped around the outside of the third cylinder wall 3 in an annular jacket structure. It has an independent circulating water passage inside, including a constant temperature layer inlet 71 and a constant temperature layer outlet 72. External hot water can enter the circulating water passage from the constant temperature layer inlet 71 and circulate out from the constant temperature layer outlet 72 to heat and keep the third cylinder wall 3 warm.

[0055] In one specific embodiment of this disclosure, the inlet 71 of the constant temperature layer is located at the bottom of the constant temperature water bath layer 7, and the outlet 72 of the constant temperature layer is located at the top of the constant temperature water bath layer 7. This design forms a forced convection path from bottom to top. Through the bottom-inlet and top-outlet flow configuration, it ensures that the water in the constant temperature water bath layer 7 is completely filled with water and there is no air gap retention. Driven by gravity and pressure difference, the water flow continuously rises, causing the outer surface of the third cylinder wall 3 to uniformly contact the heat medium, effectively eliminating local temperature differences. This structure maintains the axial temperature uniformity of the third cylinder wall 3 through continuous heat exchange, thereby ensuring that the temperature of the biological reaction zone inside the wastewater treatment device is stable within the optimal range of 25~35℃ for microbial activity.

[0056] In one specific embodiment of this disclosure, such as Figures 2 to 3 As shown, multiple first through holes 12 are provided, and the multiple first through holes 12 are configured to be distributed in the circumferential direction on the upper part of the first cylinder wall 1. The first through holes 12 are covered with a first screen, which is used to prevent the solid phase carrier in the first chamber 11 from leaking out. And / or, multiple second through holes 22 are provided, and the multiple second through holes 22 are configured to be distributed in the circumferential direction on the lower part of the second cylinder wall 2. The second through holes 22 are covered with a second screen, which is used to prevent the solid phase carrier in the second chamber 31 from leaking out to the transition chamber 21.

[0057] Specifically, multiple first through holes 12 are evenly distributed circumferentially along the upper part of the first cylinder wall 1, and multiple second through holes 22 are evenly distributed circumferentially along the lower part of the second cylinder wall 2. The first through holes 12 and the second through holes 22 typically have specific shapes, including but not limited to circular, rectangular, triangular, or other shapes. The first and second screens are independently configured with the same or different mesh structures to achieve graded filtration. The screens include, but are not limited to, porous screens, biological filter membranes, or composite filter layers. The pore size range of the porous screen is selected according to the diameter of the solid carrier particles. The biological filter membrane can be a microfiltration membrane, ultrafiltration membrane, etc. The composite filter layer is a stacked combination of porous screens and filter membranes.

[0058] In one embodiment of this disclosure, the wastewater treatment apparatus further includes an outlet pipe 33 configured to communicate with the upper part of the second chamber 31 to discharge treated liquid. Figure 1 and Figure 4As shown, the outlet pipe 33, located at the upper part of the second chamber 31, penetrates the third cylinder wall 3 and extends to the outside of the wastewater treatment device, serving as the outlet channel for the final purified liquid. The interface of the outlet pipe 33 is located at the upper part of the third cylinder wall 3. The second chamber 31 receives liquid from the bottom, which also creates an upward flow field, allowing the treated liquid in the second chamber 31 to be discharged from the outlet pipe 33 without stagnation, while avoiding the mixing of untreated wastewater in the chamber.

[0059] In one embodiment of this disclosure, such as Figure 1 and Figure 4 As shown, the wastewater treatment device also includes a sampling port 36 located on the upper part of the third cylindrical wall 3, which connects the second chamber 31 and the outside of the wastewater treatment device. The sampling port 36 includes, but is not limited to, sampling from inside pipes, preferably selecting vertical pipe sections to avoid turbulent areas, such as... Figure 1 As shown, a short pipe is installed on the third cylinder wall 3, which can be manually operated for sampling; as another optional implementation, the sampling port 36 can be configured for automatic flow sampling. The sampling port 36 integrates a flow sensor and an electric pump body, and takes mixed liquid samples according to the real-time flow ratio, which can accurately calculate the total daily discharge of purified wastewater.

[0060] In one embodiment of this disclosure, the sampling port 36, which is also located on the upper part of the third cylinder wall 3, is configured to collect mixed water samples from the upper part of the second chamber 31. By testing the nitrogen content in the mixed water sample, it is determined whether the liquid sample meets the discharge standard. If the discharge standard is met, the liquid outlet pipe 33 is opened; otherwise, the liquid outlet pipe 33 is not opened.

[0061] In one embodiment of this disclosure, the bottom of the first chamber 11 is configured to have a first sludge discharge port 13 communicating with the outside of the wastewater treatment device. The first sludge discharge port 13 is configured to open when the wastewater treatment device is in a shutdown state to discharge sludge; and / or, the bottom of the second chamber 31 is configured to have a second sludge discharge port 32 communicating with the outside of the wastewater treatment device. The second sludge discharge port 32 is configured to open when the wastewater treatment device is in a shutdown state to discharge sludge. Specifically, the first sludge discharge port 13 is located at the bottom of the first chamber 11, communicating with the outside of the wastewater treatment device. When the wastewater treatment device is in operation, the first sludge discharge port 13 is set to a closed state to ensure the sealing and isolation of the reaction volume of the first chamber 11 and the stable operation of the process. When the wastewater treatment device finishes operation and is in a shutdown state, the first sludge discharge port 13 is set to an open state to efficiently drain the remaining sludge and sediment accumulated at the bottom of the first chamber 11. And / or, the second sludge discharge port 32 is located at the bottom of the second chamber 31 and connects to the outside of the sewage treatment device. When the sewage treatment device is in operation, the second sludge discharge port 32 is set to the closed state to ensure the sealing of the second chamber 31 and the continuity of the water treatment process. When the sewage treatment device finishes operation and is in the shutdown state, the second sludge discharge port 32 is switched to the open state to discharge the sludge and solid residues deposited inside the second chamber 31.

[0062] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A wastewater treatment device, characterized in that, include: The first cylindrical wall (1) is configured to form a first chamber (11), and a first through hole (12) is provided in the upper part of the first cylindrical wall (1) through its thickness direction. The second cylindrical wall (2) is sleeved on the outside of the first cylindrical wall (1) and is configured to form a transition chamber (21) with the first cylindrical wall (1); the first chamber (11) is configured to communicate with the transition chamber (21) through the first through hole (12), and the liquid in the upper part of the first chamber (11) is configured to flow into the transition chamber (21) through the first through hole (12); a second through hole (22) is provided in the lower part of the second cylindrical wall (2). The third cylindrical wall (3) is sleeved on the outside of the second cylindrical wall (2) and is configured to form a second chamber (31) with the second cylindrical wall (2); the transition chamber (21) is configured to communicate with the second chamber (31) through a second through hole (22), and the liquid in the transition chamber (21) is configured to flow into the second chamber (31) through the second through hole (22); Liquid inlet unit (4) is configured to communicate with the bottom of the first chamber (11) and the second chamber (31) respectively, and is configured to supply liquid from the bottom to the bottom of the first chamber (11) and the second chamber (31) respectively.

2. The wastewater treatment device according to claim 1, characterized in that, The liquid inlet unit (4) includes a liquid inlet chamber (42) surrounded by a liquid inlet wall (41) and a liquid inlet (43) communicating with the liquid inlet chamber (42). The liquid inlet chamber (42) is configured to communicate with the bottom openings of the first chamber (11) and the second chamber (31).

3. The wastewater treatment device according to claim 2, characterized in that, The liquid inlet chamber (42) is configured to completely cover the bottom regions of the first chamber (11) and the second chamber (31), with a portion of the liquid in the liquid inlet chamber (42) configured to enter the first chamber (11) and a portion of the liquid configured to enter the second chamber (31).

4. The wastewater treatment device according to claim 2, characterized in that, The inlet wall (41) is constructed in a conical shape, and the inlet port (43) is constructed to connect to the center of the inlet wall (41).

5. The wastewater treatment device according to claim 1, characterized in that, It also includes an aeration unit (5), which includes an aeration disc (51) and an aeration pipe (52). The aeration disc (51) is located at the bottom of the first chamber (11) and is configured to aerate the first chamber (11). One end of the aeration pipe (52) is connected to the aeration disc (51), and the other end is configured to extend to the outside of the wastewater treatment device for connection with an external air source.

6. The wastewater treatment device according to claim 1, characterized in that, It also includes a stirring unit (6), which includes a paddle structure (61), a stirring rod (62) and a stirring motor (63). The paddle structure (61) is disposed on the stirring rod (62), and the stirring rod (62) extends upward along the first chamber (11) to connect with the stirring motor (63) located at the top of the wastewater treatment device.

7. The wastewater treatment device according to claim 1, characterized in that, It also includes a constant temperature water bath layer (7); the constant temperature water bath layer (7) covers the outside of the third cylinder wall (3), the constant temperature water bath layer (7) is provided with a circulating water passage, and the constant temperature water bath layer (7) has a constant temperature layer inlet (71) and a constant temperature layer outlet (72).

8. The wastewater treatment device according to claim 1, characterized in that, The first through hole (12) is provided in multiple ways, and the multiple first through holes (12) are configured to be distributed in the circumferential direction on the upper part of the first cylinder wall (1). The first through hole (12) is covered with a first screen. And / or, Multiple second through holes (22) are provided, and the multiple second through holes (22) are configured to be distributed in the circumferential direction of the lower part of the second cylinder wall (2), and a second screen is covered on the second through holes (22).

9. The wastewater treatment device according to claim 1, characterized in that, The bottom of the first chamber (11) is configured to have a first sludge discharge port (13) communicating with the outside of the wastewater treatment device. The first sludge discharge port (13) is configured to open when the wastewater treatment device is in the off state to discharge sludge. And / or, The bottom of the second chamber (31) is configured to have a second sludge discharge port (32) communicating with the outside of the wastewater treatment device. The second sludge discharge port (32) is configured to open when the wastewater treatment device is in the off state to discharge sludge.

10. The wastewater treatment apparatus according to claim 1, characterized in that, It also includes a liquid outlet pipe (33) configured to communicate with the upper part of the second chamber (31) to discharge the treated liquid.

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