Phosphorus removal agent dosing device for sewage treatment plant

Abstract

The utility model discloses sewage treatment plant phosphorus removal reagent feeding device, including data acquisition module, control unit, metering distribution subassembly and reagent storage supply unit, and data acquisition module includes total phosphorus concentration sensor, flowmeter and PH sensor, and total phosphorus concentration sensor sets up in the water inlet end, intermediate section and water outlet end of biochemical reaction pool, is used for real -time monitoring the change trend of total phosphorus concentration in sewage, and the water inlet end, intermediate section and water outlet end of biochemical reaction pool all are provided with reagent feeding pipe. The utility model has the beneficial effects that: through multipoint real -time monitoring and dynamic feedback control, the hysteresis problem existing in traditional manual regulating mode is solved. When the total phosphorus concentration of biochemical reaction pool intermediate section appears fluctuation, the system can identify quickly and make corresponding adjustment, avoids the sewage discharge of exceeding the standard. In addition, the accurate feeding function of metering distribution subassembly effectively reduces reagent waste, and reduces operating cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a phosphorus removal agent dosing device for wastewater treatment plants. Background Technology

[0002] The addition of phosphorus removal agents in wastewater treatment plants is a core step in chemical phosphorus removal, directly affecting the removal efficiency, operating costs, and sludge properties. Common types of phosphorus removal agents include aluminum salts, iron salts, calcium salts, and some composite, polymeric, or metal-based (such as lanthanum) specialized phosphorus removal agents. Choosing the appropriate dosing point is crucial, directly impacting agent utilization efficiency and the final phosphorus removal effect. The dosage is a core control parameter; insufficient dosage will result in substandard phosphorus removal, while excessive dosage will waste agents, increase sludge volume, and potentially affect effluent quality and sludge properties. Phosphorus removal agent dosing requires meticulous management. A successful dosing scheme must be based on a deep understanding of water quality characteristics, reasonable dosing point selection, precise dosage determined through experimentation and real-time optimization, and reliable dosing equipment and control systems. Simultaneously, its impact on sludge production, properties, and overall operating costs must be fully considered to achieve efficient, stable, and economical phosphorus removal goals.

[0003] The common method for adding phosphorus removal agents in some existing wastewater treatment plants is to adjust the dosage of the agent at the front end based on the total phosphorus data of the effluent. However, due to the long wastewater treatment process, the influent volume and water quality fluctuate in actual operation. It is difficult to guarantee a stable phosphorus removal effect by simply adjusting the dosage of the agent based on the total phosphorus data of the effluent. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing methods for adding phosphorus removal agents in wastewater treatment plants, which involve adjusting the dosage of the agent based on the total phosphorus data of the effluent. Due to the long wastewater treatment process and the fluctuations in the influent volume and quality during actual operation, it is difficult to guarantee a stable phosphorus removal effect by simply adjusting the dosage based on the total phosphorus data of the effluent. This invention provides a phosphorus removal agent dosing device for wastewater treatment plants.

[0005] The purpose of this utility model is achieved through the following technical solution: a phosphorus removal agent dosing device for a wastewater treatment plant, including a data acquisition module, a control unit, a metering and dispensing component, and an agent storage and supply unit;

[0006] The data acquisition module includes a total phosphorus concentration sensor, a flow meter, and a pH sensor. The total phosphorus concentration sensor is installed at the inlet, middle section, and outlet of the biochemical reaction tank to monitor the changing trend of total phosphorus concentration in wastewater in real time. The inlet, middle section, and outlet of the biochemical reaction tank are all equipped with a chemical dosing pipe. The flow meter and pH sensor are installed on the chemical dosing pipe. The flow meter is used to measure the flow rate of the chemical liquid flowing through the pipe. A branch valve is also installed on the chemical dosing pipe.

[0007] The control unit includes a microprocessor and a memory chip. The microprocessor is connected to the data acquisition module and the branch valve. The control unit communicates with the metering and dispensing component via an RS interface. The control unit analyzes and processes the data collected by the data acquisition module to generate specific reagent dosing instructions. The control unit also has a self-learning function, enabling it to continuously optimize the dosing model based on historical data accumulated over long-term operation. For example, when the total phosphorus concentration in the middle section of the biochemical reaction tank shows an abnormal increase, the control unit will combine historical data to predict future trends and adjust the front-end dosing rate in advance, thereby avoiding the risk of subsequent exceedances.

[0008] The metering and dispensing assembly includes a stepper motor, a peristaltic pump, and a delivery pipe. The peristaltic pump is installed on the discharge pipe of the storage tank, and a main valve is installed on the discharge pipe. One end of the delivery pipe is connected to the outlet of the peristaltic pump, and the other end is connected to the drug dosing pipe. The stepper motor receives pulse signals from the control unit and adjusts its speed according to the signal frequency to precisely control the drug flow rate. At the same time, the control unit receives the flow rate of the drug liquid flowing through the drug dosing pipe measured by the flow meter. The comparison of the two sets of data enables precise control of the drug dosage.

[0009] A further technical solution involves fixing a total phosphorus concentration sensor on the inner wall of the biochemical reaction tank and setting a pH sensor in the area where the reagent and wastewater are mixed to detect changes in the acidity or alkalinity of the mixture.

[0010] A further technical solution is that the control unit also includes a display screen and an operation panel. The microprocessor runs program code based on fuzzy logic algorithms, and the control unit combines historical data to predict future trends and adjust the dosing strategy.

[0011] A further technical solution involves a stepper motor receiving pulse signals from a control unit and adjusting its rotational speed according to the signal frequency to control the flow rate of the peristaltic pump.

[0012] A further technical solution is that the bottom of the storage tank has a conical structure, a geared motor is installed on the upper part of the storage tank, the power output end of the geared motor extends into the storage tank and is equipped with an agitator, and a liquid level gauge is installed on the inner wall of the storage tank.

[0013] The level gauge is electrically connected to the control unit. When the liquid level falls below a set threshold, the level gauge sends a signal back to the control unit. The level gauge senses the liquid level of the chemicals in the tank and sends a signal back to the control unit. When the liquid level falls below the set threshold, the control unit triggers an alarm to remind the operator to replenish the chemicals in a timely manner.

[0014] A further technical solution is to use corrosion-resistant materials to manufacture the storage tank, and the conical structure is designed to facilitate the complete discharge of the reagent.

[0015] All the aforementioned components work together through a rational spatial layout and close coordination. Real-time information acquired by the data acquisition module is processed by the control unit and converted into specific dosing instructions, which are then executed by the metering and distribution component to achieve precise chemical dosing. Simultaneously, the storage tank and level gauge provide continuous and stable material support for the entire system, ensuring uninterrupted dosing. This integrated design enables multi-point real-time monitoring and dynamic feedback control, solving the lag problem inherent in traditional manual adjustment methods. For example, when the total phosphorus concentration fluctuates in the middle section of the biochemical reactor, the system can quickly identify this and adjust the dosage of the corresponding chemical dosing pipes at the inlet and outlet of the biochemical reactor to prevent excessive wastewater discharge. Furthermore, the precise dosing function of the metering and distribution component effectively reduces chemical waste and lowers operating costs.

[0016] In practical applications, this device can be widely used in various wastewater treatment plants, especially in scenarios where influent flow and water quality fluctuate significantly. For example, in a certain wastewater treatment plant, due to unstable influent water quality, traditional manual adjustment methods were insufficient to meet the stable requirements of total phosphorus concentration in the effluent. After introducing this device, through multi-point real-time monitoring and dynamic feedback control, the system can quickly respond to changes in water quality and adjust the dosage of chemicals in a timely manner. Experiments show that compared with traditional methods, this device can reduce the amount of chemicals used by approximately 10%, while reducing the fluctuation range of total phosphorus concentration in the effluent to within ±0.1 mg / L, significantly improving the stability and economy of wastewater treatment.

[0017] This invention has the following advantages: Through multi-point real-time monitoring and dynamic feedback control, it solves the problem of lag in traditional manual adjustment methods. When the total phosphorus concentration fluctuates in the middle section of the biochemical reaction tank, the system can quickly identify and make corresponding adjustments, avoiding excessive wastewater discharge. Furthermore, the precise dosing function of the metering and distribution component effectively reduces reagent waste and lowers operating costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0020] Figure 3 This is a schematic cross-sectional view of the storage tank of this utility model;

[0021] In the diagram, 1. Total phosphorus concentration sensor; 2. Flow meter; 3. pH sensor; 4. Inlet; 5. Biochemical reaction tank; 6. Outlet; 7. Chemical dosing pipe; 8. Support; 9. Control unit; 10. Display screen; 11. Operation panel; 12. Main valve; 13. Peristaltic pump; 14. Stepper motor; 15. Chemical delivery pipe; 16. Storage tank; 17. Branch valve; 18. Gear motor; 19. Agitator; 20. Level gauge. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] 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.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and 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 this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, 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 utility model based on the specific circumstances.

[0028] like Figures 1-3 As shown, the phosphorus removal agent dosing device for a wastewater treatment plant includes a data acquisition module, a control unit, a metering and distribution component, and a agent storage and supply unit.

[0029] The data acquisition module includes a total phosphorus concentration sensor 1, a flow meter 2, and a pH sensor 3. The total phosphorus concentration sensor 1 is installed at the inlet 4, the middle section, and the outlet 6 of the biochemical reaction tank 5 to monitor the changing trend of total phosphorus concentration in wastewater in real time. The inlet 4, the middle section, and the outlet 6 of the biochemical reaction tank 5 are all equipped with a chemical dosing pipe 7. The flow meter 2 and the pH sensor 3 are installed on the chemical dosing pipe 7. The flow meter 2 is used to measure the flow rate of the chemical liquid flowing through the pipe. A branch valve 17 is also installed on the chemical dosing pipe 7.

[0030] The control unit 9 includes a microprocessor and a memory chip. The microprocessor is connected to the data acquisition module and the branch valve. The control unit 9 communicates with the metering and dispensing component via an RS485 interface. The control unit 9 analyzes and processes the data collected by the data acquisition module to generate specific reagent dosing instructions. The control unit 9 also has a self-learning function, which can continuously optimize the dosing model based on historical data accumulated during long-term operation. For example, when the total phosphorus concentration in the middle section of the biochemical reaction tank 5 shows an abnormal increase, the control unit 9 will combine historical data to predict future trends and adjust the front-end dosing amount in advance, thereby avoiding the risk of subsequent exceedances.

[0031] The metering and dispensing assembly includes a stepper motor 14, a peristaltic pump 13, and a drug delivery pipe 15. The peristaltic pump 13 is installed on the discharge pipe of the storage tank 16, and a main valve 12 is installed on the discharge pipe of the storage tank 16. One end of the drug delivery pipe 15 is connected to the outlet of the peristaltic pump 13, and the other end is connected to the drug dosing pipe 7. The stepper motor 14 receives pulse signals from the control unit 9 and adjusts its speed according to the signal frequency to precisely control the drug flow rate. At the same time, the control unit 9 receives the flow rate of the drug liquid flowing through the drug dosing pipe 7 measured by the flow meter 2. The comparison of the two sets of data enables precise control of the drug dosage.

[0032] The total phosphorus concentration sensor 1 is fixed on the inner wall of the biochemical reaction tank 5, and the pH sensor 3 is set in the area after the reagent and sewage are mixed, to detect the change in pH of the mixture after the reagent and sewage are mixed.

[0033] The control unit 9 also includes a display screen 10 and an operation panel 11. The microprocessor runs program code based on fuzzy logic algorithm. The control unit 9 combines historical data to predict future trends and adjust the dosing strategy.

[0034] The stepper motor 13 receives pulse signals from the control unit 9 and adjusts its speed according to the signal frequency to control the drug flow rate of the peristaltic pump 13.

[0035] The bottom of the storage tank 16 is conical, and a geared motor 18 is installed on the upper part of the storage tank 16. The power output end of the geared motor 18 extends into the storage tank 16 and is equipped with an agitator 19. A level gauge 20 is installed on the inner wall of the storage tank 16.

[0036] The level gauge 20 is electrically connected to the control unit 9. When the liquid level is lower than the set threshold, the level gauge 20 sends a signal back to the control unit 9. The level gauge 20 senses the liquid level of the agent in the storage tank 16 and sends a signal back to the control unit 9. When the liquid level is lower than the set threshold, the control unit 9 triggers an alarm to remind the operator to replenish the agent in time.

[0037] The storage tank 16 is made of corrosion-resistant material, and its conical structure is designed to facilitate the complete discharge of the reagent.

[0038] All the aforementioned components work together through a rational spatial layout and close coordination. Real-time information acquired by the data acquisition module is processed by the control unit 9 and converted into specific dosing instructions, which are then executed by the metering and distribution component to achieve precise chemical dosing. Simultaneously, the storage tank 16 and level gauge 20 provide continuous and stable material support for the entire system, ensuring uninterrupted dosing. This integrated design enables multi-point real-time monitoring and dynamic feedback control, solving the lag problem inherent in traditional manual adjustment methods. For example, when the total phosphorus concentration fluctuates in the middle section of the biochemical reaction tank 5, the system can quickly identify and adjust the dosage of the corresponding chemical dosing pipes 7 at the inlet 4 and outlet 6 of the biochemical reaction tank 5 to prevent excessive wastewater discharge. Furthermore, the precise dosing function of the metering and distribution component effectively reduces chemical waste and lowers operating costs.

[0039] In practical applications, this device can be widely used in various wastewater treatment plants, especially in scenarios where influent flow and water quality fluctuate significantly. For example, in a certain wastewater treatment plant, due to unstable influent water quality, traditional manual adjustment methods were insufficient to meet the stable requirements of total phosphorus concentration in the effluent. After introducing this device, through multi-point real-time monitoring and dynamic feedback control, the system can quickly respond to changes in water quality and adjust the dosage of chemicals in a timely manner. Experiments show that compared with traditional methods, this device can reduce the amount of chemicals used by approximately 30%, while reducing the fluctuation range of total phosphorus concentration in the effluent to within ±0.1 mg / L, significantly improving the stability and economy of wastewater treatment.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A phosphorus removal agent dosing device for a wastewater treatment plant, characterized in that, It includes a data acquisition module, a control unit, a metering and dispensing component, and a drug storage and supply unit; The data acquisition module includes a total phosphorus concentration sensor (1), a flow meter (2), and a pH sensor (3). The total phosphorus concentration sensor (1) is installed at the inlet (4), middle section, and outlet (6) of the biochemical reaction tank (5). The inlet (4), middle section, and outlet (6) of the biochemical reaction tank (5) are all equipped with a reagent dosing pipe (7). The flow meter (2) and pH sensor (3) are installed on the reagent dosing pipe (7). A branch valve (17) is also installed on the reagent dosing pipe (7). The control unit (9) includes a microprocessor and a storage chip. The microprocessor is connected to the data acquisition module and the branch valve. The control unit (9) communicates with the metering and distribution component through an RS485 interface. The metering and dispensing assembly includes a stepper motor (14), a peristaltic pump (13), and a drug delivery pipe (15). The peristaltic pump (13) is installed on the discharge pipe of the storage tank (16), and a main valve (12) is installed on the discharge pipe of the storage tank (16). One end of the drug delivery pipe (15) is connected to the outlet of the peristaltic pump (13), and the other end is connected to the drug dosing pipe (7).

2. The wastewater treatment plant phosphorus removal agent dosing device according to claim 1, characterized in that: The total phosphorus concentration sensor (1) is fixed on the inner wall of the biochemical reaction tank (5), and the pH sensor (3) is set in the area after the reagent and sewage are mixed.

3. The wastewater treatment plant phosphorus removal agent dosing device according to claim 1, characterized in that: The control unit (9) also includes a display screen (10) and an operation panel (11). The microprocessor runs program code based on fuzzy logic algorithm. The control unit (9) combines historical data to predict future trends and adjust the dosing strategy.

4. The wastewater treatment plant phosphorus removal agent dosing device according to claim 1, characterized in that: The stepper motor (14) receives a pulse signal from the control unit (9) and adjusts its rotation speed according to the signal frequency to control the drug flow rate of the peristaltic pump (13).

5. The wastewater treatment plant phosphorus removal agent dosing device according to claim 1, characterized in that: The bottom of the storage tank (16) is conical. A geared motor (18) is installed on the upper part of the storage tank (16). The power output end of the geared motor (18) extends into the storage tank (16) and is equipped with a stirrer (19). A level gauge (20) is installed on the inner wall of the storage tank (16). The level gauge (20) is electrically connected to the control unit (9). When the liquid level is lower than the set threshold, the level gauge (20) feeds back the signal to the control unit (9).

6. The wastewater treatment plant phosphorus removal agent dosing device according to claim 5, characterized in that: The storage tank (16) is made of corrosion-resistant material, and the conical structure is designed to facilitate the complete discharge of the agent.

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