Chemically strengthened primary precipitation-based urban sewage carbon source capturing device
By using multiple diversion pipes and baffles in the reaction tank, the problems of uneven reagent addition and disturbance in the sedimentation zone were solved, achieving more efficient reagent mixing and sedimentation, and improving carbon source capture efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN SHENSHUI WATER RESOURCES CONSULTING CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-03
AI Technical Summary
In traditional chemically enhanced primary precipitation processes, the reagents are added at concentrated locations, resulting in poor mixing time. Furthermore, the stirring mechanism in the reaction tank causes significant disturbance in the precipitation zone, which affects the carbon source capture efficiency.
Multiple diversion pipes are used to uniformly add coagulant around the periphery. Combined with the design of baffles and stirring mechanism, a stable flow zone is formed, which reduces disturbance in the sedimentation zone and improves the uniformity of agent mixing and sedimentation effect.
It improves the mixing efficiency of the reagent and the wastewater, reduces disturbance to the sedimentation zone, and enhances the carbon source capture efficiency and sedimentation effect.
Smart Images
Figure CN224450400U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of urban sewage treatment technology, and in particular to a carbon source capture device for urban sewage based on chemically enhanced primary sedimentation. Background Technology
[0002] The organic carbon sources contained in urban wastewater are valuable recyclable resources. Traditional primary sedimentation processes have limited carbon source capture rates. Chemically enhanced primary sedimentation technology, by adding coagulants, improves the capture efficiency of suspended solids and some dissolved organic matter, and is an effective way to achieve carbon source recovery and energy conservation in wastewater treatment plants. However, existing chemically enhanced primary sedimentation technologies still have some problems in practical applications:
[0003] (1) The reagents are added to the reaction tank by single-point dosing. The dosing location is concentrated, resulting in poor mixing time with the sewage, which affects the overall flocculation effect and carbon source capture efficiency.
[0004] (2) Because there is a stirring mechanism in the reaction tank to stir the water flow, when the water in the reaction tank flows into the sedimentation zone, it causes great disturbance to the sedimentation zone and reduces the sedimentation performance.
[0005] To address this, a carbon source capture device for urban wastewater based on chemically enhanced primary sedimentation is proposed. Utility Model Content
[0006] The purpose of this invention is to provide a carbon source capture device for urban sewage based on chemically enhanced primary sedimentation, aiming to solve or improve at least one of the above-mentioned technical problems.
[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a carbon source capture device for urban sewage based on chemically enhanced primary sedimentation, including a reaction tank, a sewage inlet pipe connected to the reaction tank, a coagulant dosing device above the reaction tank, and multiple diversion pipes connected to the bottom of the coagulant dosing device. The multiple diversion pipes are evenly arranged circumferentially above the reaction tank and connected to the inner cavity of the reaction tank.
[0008] The reaction tank is equipped with a stirring mechanism. A first water outlet pipe is fixedly connected to and connected to the bottom of the side wall of the reaction tank. The first water outlet pipe is located below the stirring mechanism. A baffle plate is fixedly connected to the reaction tank. The baffle plate is located between the stirring mechanism and the first water outlet pipe and below the sewage inlet pipe. There is a gap between one side of the baffle plate and the inner side wall of the reaction tank. The gap is located on the side of the reaction tank away from the first water outlet pipe.
[0009] A sedimentation tank is connected to one side of the reaction tank via the first outlet pipe.
[0010] Preferably, the stirring mechanism includes a motor fixed to the top wall of the reaction tank, a rotating shaft fixed to the output shaft of the motor, and a plurality of stirring blades fixed to the bottom of the rotating shaft in a circumferential direction, the stirring blades being located above the baffle plate.
[0011] Preferably, the sewage inlet pipe is fixedly connected to the top of the side wall of the reaction tank, and the end of the sewage inlet pipe extends into the interior of the reaction tank, with the end of the sewage inlet pipe being offset from the gap.
[0012] Preferably, the baffle is inclined, and the side of the baffle closest to the gap is the lower end.
[0013] Preferably, the coagulant dosing device includes a reagent tank fixed to the top of the reaction tank, a reagent outlet pipe fixed to and connected to the bottom of the reagent tank, a valve fixed to the reagent outlet pipe, and the bottom of the reagent outlet pipe fixed to and connected to multiple of the diversion pipes.
[0014] Preferably, a baffle plate is fixed to the inner bottom wall of the reaction tank, the baffle plate is positioned opposite to the first water outlet pipe, there is a gap between the baffle plate and the first water outlet pipe, and the height of the baffle plate is higher than the height of the first water outlet pipe.
[0015] Preferably, the inner diameter of the first outlet pipe is gradually expanding, with the smaller diameter end of the first outlet pipe facing the reaction tank and the larger diameter end facing the sedimentation tank.
[0016] Preferably, the end of the first outlet pipe away from the reaction tank is fixedly connected to and communicates with the bottom of the side wall of the sedimentation tank, and a clean water outlet pipe is fixedly connected to and communicates with the side of the sedimentation tank away from the first outlet pipe. The clean water outlet pipe is located above the first outlet pipe, and a sewage outlet is provided at the bottom of the sedimentation tank. A valve is provided on the sewage outlet.
[0017] This utility model discloses the following technical effects: wastewater and chemicals are added to a reaction tank and mixed by a stirring mechanism. The chemicals are added through multiple circumferentially evenly arranged diversion pipes at the top of the reaction tank, which improves the uniformity of chemical addition and the mixing efficiency of wastewater and chemicals. Furthermore, because a baffle is set between the stirring mechanism and the outlet pipe, the stirring mechanism causes significant disturbance to the water above the baffle, while a relatively stable flow zone is formed below the baffle. That is, the stirred water first flows through the gap into the stable flow zone below the baffle, and then flows into the sedimentation tank through the first outlet pipe, thereby reducing disturbance to the sedimentation zone and improving the sedimentation effect. In addition, the setting of the baffle increases the flow path of the water, which facilitates further improvement of the mixing effect of wastewater and chemicals. Attached Figure Description
[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a top view of the reaction tank in this utility model.
[0021] In the diagram: 1. Reaction tank; 2. Sewage inlet pipe; 3. Diversion pipe; 4. First outlet pipe; 5. Baffle plate; 6. Gap; 7. Sedimentation tank; 8. Rotating shaft; 9. Agitator; 10. Conical diffuser; 11. Chemical tank; 12. Chemical outlet pipe; 13. Baffle plate; 14. Clear water outlet pipe. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Reference Figures 1-2 This utility model provides a carbon source capture device for urban sewage based on chemically enhanced primary sedimentation, including a reaction tank 1, a sewage inlet pipe 2 connected to the reaction tank 1, a coagulant dosing device above the reaction tank 1, and multiple diversion pipes 3 connected to the bottom of the coagulant dosing device. The multiple diversion pipes 3 are evenly arranged around the top of the reaction tank 1, fixed to the top of the reaction tank 1, and connected to the inner cavity of the reaction tank 1.
[0025] A stirring mechanism is installed inside the reaction tank 1. A first water outlet pipe 4 is fixedly connected to and connected to the bottom of the side wall of the reaction tank 1. The first water outlet pipe 4 is located below the stirring mechanism. A baffle plate 5 is fixedly connected inside the reaction tank 1. The baffle plate 5 is located between the stirring mechanism and the first water outlet pipe 4 and below the sewage inlet pipe 2. There is a gap 6 between one side of the baffle plate 5 and the inner side wall of the reaction tank 1. The gap 6 is located on the side of the reaction tank 1 away from the first water outlet pipe 4.
[0026] One side of the reaction tank 1 is connected to the sedimentation tank 7 through the first outlet pipe 4.
[0027] Wastewater and chemicals are added to reaction tank 1 and mixed by a stirring mechanism. The chemicals are added through multiple circumferentially distributed diversion pipes 3 at the top of reaction tank 1, which improves the uniformity of chemical addition and the mixing efficiency of wastewater and chemicals. Furthermore, because a baffle plate 5 is set between the stirring mechanism and the first outlet pipe 4, the stirring mechanism causes significant disturbance to the water above the baffle plate 5, while a relatively stable flow zone is formed below the baffle plate 5. That is, the stirred water first flows into the stable flow zone below the baffle plate 5 through the gap 6, and then flows into the sedimentation tank 7 through the first outlet pipe 4, thereby reducing disturbance to the sedimentation zone and improving the sedimentation effect. In addition, the setting of the baffle plate 5 increases the flow path of water, which facilitates further improvement of the mixing effect of wastewater and chemicals.
[0028] Furthermore, multiple conical diffusers 10 are fixedly connected inside the reaction tank 1. The multiple conical diffusers 10 are arranged in a one-to-one correspondence with multiple diversion pipes 3. The conical diffusers 10 are located directly below the outlet of the diversion pipe 3, and the pointed end of the conical diffuser 10 faces the diversion pipe 3.
[0029] When the reagent flows out through the diversion pipe 3, it flows into the conical diffuser plate 10, causing the reagent to diffuse into the reaction tank 1 around the conical diffuser plate 10, thereby improving the uniformity of reagent addition.
[0030] In some alternative embodiments, the stirring mechanism includes a motor fixed to the top wall of the reaction tank 1, a rotating shaft 8 fixed to the output shaft of the motor, and a plurality of stirring paddles 9 circumferentially fixed to the bottom of the rotating shaft 8, the stirring paddles 9 being located above the baffle plate 5.
[0031] In some alternative embodiments, the sewage inlet pipe 2 is fixedly connected to the top of the side wall of the reaction tank 1, and the end of the sewage inlet pipe 2 extends into the interior of the reaction tank 1, with the end of the sewage inlet pipe 2 being misaligned with the gap 6.
[0032] Therefore, the added wastewater cannot flow out directly through gap 6, but first flows into the area above baffle 5 for stirring, and then flows into the steady flow zone below baffle 5 through gap 6, increasing the flow path of the wastewater and improving the mixing effect.
[0033] In some alternative embodiments, the baffle 5 is inclined, with the side of the baffle 5 closest to the gap 6 being the lower end, to prevent deposits from adhering to the baffle 5.
[0034] In some alternative embodiments, the coagulant dosing device includes a reagent tank 11 fixed to the top of the reaction tank 1, a reagent outlet pipe 12 fixed to and connected to the bottom of the reagent tank 11, a valve fixed to the reagent outlet pipe 12, and the bottom of the reagent outlet pipe 12 fixed to and connected to a plurality of branch pipes 3.
[0035] Furthermore, an online COD monitoring sensor is installed on the upstream pipeline of the sewage inlet pipe 2, and a flow sensor is fixedly connected to the outlet pipe 12. The valve on the outlet pipe 12 is a solenoid valve, and a metering pump is fixedly connected to the outlet pipe 12. The online COD monitoring sensor, flow sensor, solenoid valve, metering pump, and controller are electrically connected. This configuration allows the online COD monitoring sensor to detect the amount of strong oxidant consumed by reducing substances in the sewage and transmit the information to the controller. The controller controls the opening and closing of the solenoid valve and metering pump, and simultaneously controls the operating parameters of the metering pump, thereby controlling the flow rate of the reagent. The reagent in the reagent tank 11 flows out through the outlet pipe 12, and the flow sensor monitors the reagent flow rate to achieve precise addition of the reagent. The reagent is a liquid.
[0036] In some alternative embodiments, a baffle plate 13 is fixedly connected to the inner bottom wall of the reaction tank 1. The baffle plate 13 is positioned opposite to the first water outlet pipe 4, and there is a gap between the baffle plate 13 and the first water outlet pipe 4. The height of the baffle plate 13 is higher than the height of the first water outlet pipe 4.
[0037] By setting the baffle 13, the water below the baffle 5 can be prevented from flowing out directly. Instead, the water is further deflected by the baffle 13, which reduces the flow velocity.
[0038] In some alternative embodiments, the inner diameter of the first outlet pipe 4 is gradually expanding, with the smaller diameter end of the first outlet pipe 4 facing the reaction tank 1 and the larger diameter end facing the sedimentation tank 7.
[0039] This reduces the flow rate of water entering the sedimentation tank 7, protects the flocs in the sedimentation tank 7, and improves the sedimentation effect.
[0040] In some optional embodiments, the end of the first outlet pipe 4 away from the reaction tank 1 is fixedly connected to and connected to the bottom of the side wall of the sedimentation tank 7, and a clean water outlet pipe 14 is fixedly connected to and connected to the side of the sedimentation tank 7 away from the first outlet pipe 4. The clean water outlet pipe 14 is located above the first outlet pipe 4, and a sewage outlet is provided at the bottom of the sedimentation tank 7, with a valve installed on the sewage outlet.
[0041] Furthermore, the bottom of the sedimentation tank 7 is conical, which facilitates the collection and discharge of sludge. A sludge discharge pipe is fixed to the discharge outlet, and a sludge pump (such as a screw pump or diaphragm pump) is fixed to the sludge discharge pipe. The start and stop frequency of the sludge pump and the duration of each sludge discharge are controlled by a controller to achieve the discharge and collection of carbon-rich sludge at the bottom of the sedimentation tank 7.
[0042] In use, wastewater is added to the reaction tank through the wastewater inlet pipe 2. The reagent in the reagent tank 11 flows out through the reagent outlet pipe 12 and is added to different parts of the reaction tank 1 through multiple diversion pipes 3. The motor drives the stirring paddle 9 to rotate, mixing the reagent and wastewater. The wastewater flows through the gap 6 into the flow stabilization zone below the baffle plate 5, then flows around the baffle plate 13 into the first outlet pipe 4, and then flows into the sedimentation tank 7 through the first outlet pipe 4. The flocculent material settles at the bottom of the sedimentation tank 7, and the clearer water flows out through the clear water outlet pipe 14. The valve on the sewage outlet and the sludge pump are opened periodically to discharge and collect the carbon-rich sludge at the bottom of the sedimentation tank 7.
[0043] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.
[0044] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A chemical strengthening primary precipitation-based municipal sewage carbon source capture device, characterized by: It includes a reaction tank (1), a sewage inlet pipe (2) is connected inside the reaction tank (1), a coagulant dosing device is provided above the reaction tank (1), and a plurality of diversion pipes (3) are connected to the bottom of the coagulant dosing device. The plurality of diversion pipes (3) are evenly arranged around the reaction tank (1) and are connected to the inner cavity of the reaction tank (1). The reaction tank (1) is equipped with a stirring mechanism. The bottom of the side wall of the reaction tank (1) is fixedly connected to and connected to a first water outlet pipe (4). The first water outlet pipe (4) is located below the stirring mechanism. A baffle plate (5) is fixedly connected inside the reaction tank (1). The baffle plate (5) is located between the stirring mechanism and the first water outlet pipe (4) and below the sewage inlet pipe (2). There is a gap (6) between one side of the baffle plate (5) and the inner side wall of the reaction tank (1). The gap (6) is located on the side of the reaction tank (1) away from the first water outlet pipe (4). The reaction tank (1) is connected to a sedimentation tank (7) on one side through the first outlet pipe (4).
2. The chemical strengthening primary precipitation-based municipal sewage carbon source capturing device according to claim 1, characterized in that: The stirring mechanism includes a motor fixed to the top wall of the reaction tank (1), a rotating shaft (8) fixed to the output shaft of the motor, and a plurality of stirring paddles (9) fixed to the bottom of the rotating shaft (8) in a circumferential direction. The stirring paddles (9) are located above the baffle plate (5).
3. The chemical strengthening primary precipitation-based municipal sewage carbon source capturing device according to claim 1, characterized in that: The sewage inlet pipe (2) is fixedly connected to the top of the side wall of the reaction tank (1), and the end of the sewage inlet pipe (2) extends into the interior of the reaction tank (1). The end of the sewage inlet pipe (2) is misaligned with the gap (6).
4. The primary precipitation based chemically strengthened municipal sewage carbon source capturing device according to claim 1, characterized in that: The baffle plate (5) is inclined, and the side of the baffle plate (5) closest to the gap (6) is the lower end.
5. The primary precipitation based chemically strengthened municipal sewage carbon source capturing device according to claim 1, characterized in that: The coagulant dosing device includes a medicine tank (11) fixed to the top of the reaction tank (1), a medicine outlet pipe (12) fixed to and connected to the bottom of the medicine tank (11), a valve fixed to the medicine outlet pipe (12), and the bottom of the medicine outlet pipe (12) fixed to and connected to multiple of the diversion pipes (3).
6. The primary precipitation based chemically strengthened municipal sewage carbon source capturing device according to claim 1, characterized in that: A baffle plate (13) is fixed to the inner bottom wall of the reaction tank (1). The baffle plate (13) is positioned opposite to the first water outlet pipe (4). There is a gap between the baffle plate (13) and the first water outlet pipe (4). The height of the baffle plate (13) is higher than the height of the first water outlet pipe (4).
7. The primary precipitation based chemically strengthened municipal sewage carbon source capturing device according to claim 1, characterized in that: The inner diameter of the first outlet pipe (4) is gradually expanding. The small diameter end of the first outlet pipe (4) faces the reaction tank (1), and the large diameter end faces the sedimentation tank (7).
8. The urban wastewater carbon source capture device based on chemically enhanced primary sedimentation according to claim 1, characterized in that: The end of the first outlet pipe (4) away from the reaction tank (1) is fixedly connected to the bottom of the side wall of the sedimentation tank (7) and connected. The side of the sedimentation tank (7) away from the first outlet pipe (4) is fixedly connected to and connected to a clean water outlet pipe (14). The clean water outlet pipe (14) is located above the first outlet pipe (4). A sewage outlet is opened at the bottom of the sedimentation tank (7), and a valve is installed on the sewage outlet.