A sewage treatment system

Abstract

The utility model provides a kind of sewage treatment system, including biological pool, secondary sedimentation tank and efficient sedimentation tank connected in turn, the effluent end of biological pool is connected with the water inlet end of secondary sedimentation tank, the effluent end of secondary sedimentation tank is connected with the water inlet end of efficient sedimentation tank, further include: acquisition module, including first acquisition module and second acquisition module, first acquisition module is set in the effluent end of secondary sedimentation tank, for the concentration of phosphate of the effluent end of secondary sedimentation tank and the water inlet end of efficient sedimentation tank, second acquisition module is set in the effluent end of efficient sedimentation tank, for the concentration of phosphate of the effluent end of efficient sedimentation tank;Phosphorus removal agent dosing module is connected with efficient sedimentation tank, for adding phosphorus removal agent to efficient sedimentation tank;PLC control module is respectively connected with acquisition module and phosphorus removal agent dosing module communication, realizes on-demand drug supply, can reduce the cost of labor while saving drug consumption, greatly improve the usability and reliability of the utility model.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment technology, and specifically to a wastewater treatment system. Background Technology

[0002] Phosphorus is one of the key factors causing eutrophication of water bodies. In recent years, with the increasing prominence of eutrophication, reducing phosphorus emissions through urban wastewater treatment has become a crucial link in controlling eutrophication, and efficient phosphorus removal in urban wastewater treatment plants has become an important research topic in the field of wastewater treatment.

[0003] Currently, wastewater treatment plants generally adopt an operation mode of manually adjusting the dosage of chemicals based on the effluent quality. However, due to the increased fluctuations in the influent quality and quantity of wastewater treatment plants, as well as the long retention time, manual adjustment of chemical dosage has problems such as untimely adjustments, large dosages, unstable water quality, high manual labor intensity, and high operating costs.

[0004] Therefore, existing technologies still need further development. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a sewage treatment system to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a wastewater treatment system, comprising a biological tank, a secondary sedimentation tank, and a high-efficiency sedimentation tank connected in sequence. The effluent end of the biological tank is connected to the influent end of the secondary sedimentation tank, and the effluent end of the secondary sedimentation tank is connected to the influent end of the high-efficiency sedimentation tank. The system further includes: The acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is located at the outlet of the secondary sedimentation tank and is used to acquire the phosphate concentration at the outlet of the secondary sedimentation tank and the inlet of the high-efficiency sedimentation tank. The second acquisition module is located at the outlet of the high-efficiency sedimentation tank and is used to acquire the phosphate concentration at the outlet of the high-efficiency sedimentation tank. A phosphorus removal agent dosing module is connected to the high-efficiency sedimentation tank and is used to add phosphorus removal agent to the high-efficiency sedimentation tank; The PLC control module is communicatively connected to both the acquisition module and the phosphorus removal agent dosing module.

[0007] Specifically, the phosphorus removal agent dosing module includes a dosing pump set and a phosphorus removal agent storage tank. The inlet of the dosing pump set is connected to the phosphorus removal agent storage tank through a dosing pipeline, and the outlet of the dosing pump set is connected to the high-efficiency sedimentation tank through a dosing pipeline.

[0008] Specifically, a regulating valve is installed on the dosing pipeline, which is used to adjust the opening of the dosing pipeline.

[0009] Specifically, the high-efficiency sedimentation tank includes a water distribution tank and a water distribution pool. The inlet of the water distribution pool is connected to the outlet of the secondary sedimentation tank through a pipeline, and the outlet of the water distribution pool is connected to the inlet of the water distribution pool through a booster pump.

[0010] Specifically, the water distribution tank is equipped with a first dosing point and a second dosing point, and the dosing pump set includes a first dosing pump and a second dosing pump. The first dosing point is connected to the outlet of the first dosing pump, and the second dosing point is connected to the outlet of the second dosing pump.

[0011] Specifically, a stirrer is installed at the top of the water distribution tank. The stirrer is used to mix and react the wastewater with the phosphorus removal agent by stirring, so that flocs are formed and then enter the subsequent sedimentation and separation stage.

[0012] Specifically, the acquisition module also includes a dosing pump frequency meter, which is electrically connected to the dosing pump group and is used to monitor and acquire the operating frequency of the dosing pump group in real time, and transmit the operating frequency to the PLC control module.

[0013] Specifically, the acquisition module also includes an electromagnetic flow meter, which is installed at the outlet of the dosing pump group to measure the amount of chemicals added by the dosing pump group; The electromagnetic flowmeter includes a first electromagnetic flowmeter and a second electromagnetic flowmeter. The first electromagnetic flowmeter is connected to the outlet end of the first dosing pump, and the second electromagnetic flowmeter is connected to the outlet end of the second dosing pump.

[0014] Specifically, the wastewater treatment system also includes an alarm module, which is communicatively connected to the second acquisition module and is used to issue alarm signals.

[0015] Beneficial effects: This invention provides a wastewater treatment system, including a data acquisition module, a phosphorus removal agent dosing module, and a PLC control module. By using the data acquisition module to collect phosphate concentration at the outlet of the secondary sedimentation tank, and using the PLC control module to control the start and stop of the dosing pump group and the opening of the regulating valve of the dosing pipeline, the system can achieve on-demand dosing, ensuring stable effluent quality that meets standards. This system can reduce chemical consumption and save labor costs, greatly improving the usability and reliability of this invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the wastewater treatment system provided in a specific embodiment of this utility model; Figure 2 This is a schematic diagram of the wastewater treatment system provided in a specific embodiment of this utility model; Figure 3 This is a schematic diagram of the connection between the phosphorus removal agent dosing module and the high-efficiency sedimentation tank provided in a specific embodiment of this utility model; Figure 4 This is a schematic diagram of the connection between the phosphorus removal agent dosing module and the high-efficiency sedimentation tank provided in a specific embodiment of this utility model; The above figures include the following reference numerals: 100. Data Acquisition Module; 200. Phosphorus Removal Agent Dosing Module; 300. PLC Control Module; 400. Biological Tank; 500. Secondary Sedimentation Tank; 600. High-Efficiency Sedimentation Tank; 110. First Data Acquisition Module; 120. Second Data Acquisition Module; 130. First Electromagnetic Flow Meter; 140. Second Electromagnetic Flow Meter; 210. Dosing Pump Set; 220. Phosphorus Removal Agent Storage Tank; 230. Dosing Pipeline; 240. Regulating Valve; 211. First Dosing Pump; 212. Second Dosing Pump; 610. Water Distribution Tank; 620. Mixing Reaction Tank; 611. First Dosing Point; 612. Second Dosing Point; 630. Lifting Pump. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0019] Example 1 Please see Figures 1-4 This embodiment provides a wastewater treatment system, including a biological tank 400, a secondary sedimentation tank 500, and a high-efficiency sedimentation tank 600 connected in sequence. The effluent end of the biological tank 400 is connected to the influent end of the secondary sedimentation tank 500, and the effluent end of the secondary sedimentation tank 500 is connected to the influent end of the high-efficiency sedimentation tank 600. The system also includes a data acquisition module 100, a phosphorus removal agent dosing module 200, and a PLC control module 300.

[0020] See Figure 2In the wastewater treatment system of this embodiment, the acquisition module 100 includes a first acquisition module 110 and a second acquisition module 120. The first acquisition module 110 is located at the effluent end of the secondary sedimentation tank 500 and is used to acquire the phosphate concentration at the effluent end of the secondary sedimentation tank 500 and the influent end of the high-efficiency sedimentation tank 600. The second acquisition module 120 is located at the effluent end of the high-efficiency sedimentation tank 600 and is used to acquire the phosphate concentration at the effluent end of the high-efficiency sedimentation tank 600. This multi-point real-time monitoring method ensures accurate control of phosphate concentration changes throughout the entire treatment process and improves the accuracy and reliability of water quality monitoring.

[0021] In some specific embodiments, both the first acquisition module 110 and the second acquisition module 120 can use an online phosphate meter for measurement, which can measure not only the concentration of phosphate but also the total phosphorus data.

[0022] See Figure 3 In the wastewater treatment system of this embodiment, the phosphorus removal agent dosing module 200 is connected to the high-efficiency sedimentation tank 600 and is used to add phosphorus removal agent to the high-efficiency sedimentation tank 600. The PLC control module 300 is communicatively connected to both the acquisition module 100 and the phosphorus removal agent dosing module 200. Through the communication connection with the acquisition module 100, the PLC control module 300 can acquire real-time phosphate concentration data at the effluent end of the secondary sedimentation tank 500 and the influent and effluent ends of the high-efficiency sedimentation tank 600. Based on this real-time data, the PLC can dynamically adjust the dosage of phosphorus removal agent to ensure the accuracy and stability of the treatment process.

[0023] In this embodiment, see Figure 3 The phosphorus removal agent dosing module 200 includes a dosing pump set 210 and a phosphorus removal agent storage tank 220. The inlet of the dosing pump set 210 is connected to the phosphorus removal agent storage tank 220 through a dosing pipeline 230, and the outlet of the dosing pump set 210 is connected to the high-efficiency sedimentation tank 600 through a dosing pipeline 230.

[0024] See Figure 3 Furthermore, a regulating valve 240 is installed on the dosing pipeline 230, which is used to adjust the opening of the dosing pipeline 230. By adjusting the regulating valve 240, the dosage of the phosphorus removal agent can be precisely controlled, ensuring the phosphorus removal effect while avoiding resource waste caused by over-dosing.

[0025] Preferably, the regulating valve 240 can be a V-type electric ball valve, whose ball surface is machined with a V-shaped opening, and the flow area can be changed by rotating the angle (usually 0°~90°) to achieve linear regulation of the flow rate.

[0026] See Figure 4In this embodiment, the high-efficiency sedimentation tank 600 includes a water distribution tank 610 and a mixing reaction tank 620. The inlet of the water distribution tank 610 is connected to the outlet of the secondary sedimentation tank 500 via a pipe, and the outlet of the water distribution tank 610 is connected to the inlet of the mixing reaction tank 620 via a lift pump 630. The water distribution tank 610 is equipped with a first dosing point 611 and a second dosing point 612. The dosing pump group 210 includes a first dosing pump 211 and a second dosing pump 212. The first dosing point 611 is connected to the outlet of the first dosing pump 211, and the second dosing point 612 is connected to the outlet of the second dosing pump 212. Multi-point dosing allows the phosphorus removal agent to be evenly distributed at different stages, improving the contact efficiency between the agent and the wastewater and enhancing the phosphorus removal effect. At the same time, the design of the lift pump 630 allows the wastewater to enter the mixing reaction tank 620 at an appropriate speed, promoting thorough mixing of the agent and the wastewater and improving the reaction efficiency.

[0027] In this embodiment, a stirrer is installed at the top of the mixing reaction tank 620. The stirrer is used to mix and react the wastewater with the phosphorus removal agent by stirring, forming flocs which then enter the subsequent sedimentation and separation stage. The speed of the stirrer can be adjusted according to actual treatment needs to ensure that the wastewater and phosphorus removal agent are fully mixed and reacted.

[0028] Furthermore, the agitator can be driven by a variable frequency motor, and the agitation intensity can be dynamically adjusted by the phosphorus removal agent dosing module 200 according to the influent water quality and dosage.

[0029] In this embodiment, the data acquisition module 100 also includes a dosing pump frequency meter, which is electrically connected to the dosing pump group 210. The frequency meter is used to monitor and acquire the operating frequency of the dosing pump group 210 in real time and transmit the operating frequency to the PLC control module 300. By monitoring the operating frequency of the dosing pump, the PLC control module 300 can understand the working status of the dosing pump in real time and make adjustments as needed.

[0030] See Figure 4 In this embodiment, the data acquisition module 100 further includes an electromagnetic flowmeter, which is installed at the outlet of the dosing pump group 210 to measure the amount of chemicals added by the dosing pump group 210. The electromagnetic flowmeter includes a first electromagnetic flowmeter 130 and a second electromagnetic flowmeter 140. The first electromagnetic flowmeter 130 is connected to the outlet of the first dosing pump 211, and the second electromagnetic flowmeter 140 is connected to the outlet of the second dosing pump 212. Through the measurement of the electromagnetic flowmeter, the dosage of the phosphorus removal agent can be accurately determined, providing precise data support for the PLC control module 300.

[0031] Preferably, the electromagnetic flow meter can be a DN65 electromagnetic flow meter, which features corrosion resistance, high-precision measurement and flange connection, and is particularly suitable for measuring corrosive media in chemical, environmental protection and other fields.

[0032] In this embodiment, the wastewater treatment system also includes an alarm module, which is communicatively connected to the second acquisition module 120 and is used to issue an alarm signal. For example, when the phosphate concentration at the effluent end of the high-efficiency sedimentation tank 600 exceeds a preset threshold, the alarm module will issue an alarm signal to remind the operator to handle the situation in a timely manner.

[0033] In practical applications, the working process of the wastewater treatment system in this embodiment is as follows: Wastewater first enters the biological treatment tank 400 for biological treatment. The effluent from the biological treatment tank 400 enters the secondary sedimentation tank 500 for solid-liquid separation. After the phosphate concentration is collected by the first acquisition module 110, the effluent from the secondary sedimentation tank 500 enters the distribution tank 610 of the high-efficiency sedimentation tank 600. In the distribution tank 610, based on the phosphate concentration data collected by the first acquisition module 110, the PLC control module 300 controls the phosphate removal agent dosing module 200 to add an appropriate amount of phosphate removal agent to the first dosing point 611 and the second dosing point 612 in the distribution tank 610.

[0034] Water in the distribution tank 610 enters the mixing reaction tank 620 via the lift pump 630. In the mixing reaction tank 620, the agitator at the top stirs the water, ensuring that the wastewater and phosphorus removal agent are fully mixed and reacted to form flocs. The flocs are then separated and settled in the high-efficiency sedimentation tank 600, and the clear water is discharged from the outlet of the high-efficiency sedimentation tank 600.

[0035] The second data acquisition module 120 is installed at the effluent end of the high-efficiency sedimentation tank 600 to collect the phosphate concentration in the effluent. Based on the data collected by the second data acquisition module 120, the PLC control module 300 adjusts the dosage of the phosphate removal agent in real time to ensure that the effluent quality meets standards. The PLC control module 300 is communicatively connected to an alarm module; if the phosphate concentration in the effluent exceeds a preset threshold, the alarm module will issue an alarm signal to remind the operator to handle the situation promptly.

[0036] A frequency meter monitors the operating frequency of the dosing pump unit 210 in real time and transmits the data to the PLC control module 300. An electromagnetic flow meter measures the dosage of the dosing pump unit 210, providing accurate data support for the PLC control module 300. Based on this data, combined with phosphate concentration data collected by the first acquisition module 110 and the second acquisition module 120, the PLC control module 300 controls the dosage of the dephosphorizing agent in the dephosphorizing agent dosing module 200 by controlling the start and stop of the dosing pump unit 210 and the opening of the regulating valve 240 in the dosing pipeline 230, thus achieving precise dosing.

[0037] It should be noted that the wastewater treatment system in this embodiment monitors the phosphate concentration in the effluent from the secondary sedimentation tank and the high-efficiency sedimentation tank in real time through the acquisition module, and controls the dosage of the phosphorus removal agent by the PLC control module. This achieves automatic and precise dosing of the phosphorus removal agent, improves phosphorus removal efficiency, reduces operating costs, and ensures that the effluent quality meets the standards.

[0038] The wastewater treatment system in this embodiment achieves efficient removal of phosphorus from wastewater. The biological tank 400, secondary sedimentation tank 500, and high-efficiency sedimentation tank 600 in the system are connected in sequence to form a complete wastewater treatment process. The data acquisition module 100 monitors water quality parameters in real time, and the PLC control module 300 controls the start and stop of the dosing pump group 210 and the opening of the regulating valve 240 of the dosing pipeline 230 to adjust the dosage of phosphorus removal agent in the phosphorus removal agent dosing module 200, ensuring stable system operation and effluent water quality meeting standards.

[0039] In this wastewater treatment system, the biological treatment tank 400 is mainly responsible for removing organic matter and some nitrogen and phosphorus from the wastewater, the secondary sedimentation tank 500 is responsible for solid-liquid separation, and the high-efficiency sedimentation tank 600 is mainly responsible for deep phosphorus removal. Through this multi-stage treatment method, the system can effectively remove various pollutants from the wastewater, especially phosphorus, ensuring that the effluent meets discharge standards.

[0040] During operation, the PLC control module 300 adjusts the dosage of the phosphorus removal agent by controlling the start and stop of the dosing pump group 210 and the opening of the regulating valve 240 in the dosing pipeline 230, based on the phosphate concentration data collected by the first acquisition module 110 and the second acquisition module 120, thus achieving precise dosing. When the phosphate concentration data is abnormal, the alarm module will issue an alarm signal to remind the operator to handle the situation in a timely manner and ensure the safe and stable operation of the system.

[0041] This wastewater treatment system is suitable for applications requiring deep phosphorus removal, such as urban wastewater treatment plants and industrial wastewater treatment plants. It can effectively solve problems such as unstable phosphorus removal effect and difficulty in controlling the dosage of phosphorus removal agent in traditional wastewater treatment processes, thereby improving wastewater treatment efficiency and reducing operating costs.

[0042] It should be noted that this embodiment provides a wastewater treatment system, specifically including a data acquisition module, a phosphorus removal agent dosing module, and a PLC control module. By using the data acquisition module to collect phosphate concentration at the effluent end of the secondary sedimentation tank, and using the PLC control module to control the start and stop of the dosing pump group and the opening of the regulating valve of the dosing pipeline, the system can achieve on-demand dosing, ensuring stable effluent quality that meets standards. This reduces chemical consumption and saves labor costs, effectively solving problems such as unstable phosphorus removal effect and difficulty in controlling phosphorus removal agent dosage in traditional wastewater treatment processes, thereby improving wastewater treatment efficiency and reducing operating costs.

[0043] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0044] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A wastewater treatment system comprising a biological tank, a secondary sedimentation tank, and a high-efficiency sedimentation tank connected in sequence, wherein the effluent end of the biological tank is connected to the effluent inlet of the secondary sedimentation tank, and the effluent end of the secondary sedimentation tank is connected to the effluent inlet of the high-efficiency sedimentation tank, characterized in that, The system also includes: The acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is located at the outlet of the secondary sedimentation tank and is used to acquire the phosphate concentration at the outlet of the secondary sedimentation tank and the inlet of the high-efficiency sedimentation tank. The second acquisition module is located at the outlet of the high-efficiency sedimentation tank and is used to acquire the phosphate concentration at the outlet of the high-efficiency sedimentation tank. A phosphorus removal agent dosing module is connected to the high-efficiency sedimentation tank and is used to add phosphorus removal agent to the high-efficiency sedimentation tank; The PLC control module is communicatively connected to both the acquisition module and the phosphorus removal agent dosing module.

2. The wastewater treatment system according to claim 1, characterized in that, The phosphorus removal agent dosing module includes a dosing pump set and a phosphorus removal agent storage tank. The inlet of the dosing pump set is connected to the phosphorus removal agent storage tank through a dosing pipeline, and the outlet of the dosing pump set is connected to the high-efficiency sedimentation tank through a dosing pipeline.

3. The wastewater treatment system according to claim 2, characterized in that, The dosing pipeline is equipped with a regulating valve, which is used to adjust the opening degree of the dosing pipeline.

4. The wastewater treatment system according to claim 2, characterized in that, The high-efficiency sedimentation tank includes a water distribution tank and a mixing reaction tank. The inlet of the water distribution tank is connected to the outlet of the secondary sedimentation tank through a pipeline, and the outlet of the water distribution tank is connected to the inlet of the mixing reaction tank through a booster pump.

5. The wastewater treatment system according to claim 4, characterized in that, The water distribution tank is equipped with a first dosing point and a second dosing point. The dosing pump set includes a first dosing pump and a second dosing pump. The first dosing point is connected to the outlet of the first dosing pump, and the second dosing point is connected to the outlet of the second dosing pump.

6. The wastewater treatment system according to claim 4, characterized in that, The top of the water distribution tank is equipped with a stirrer, which is used to mix and react the wastewater with the phosphorus removal agent by stirring, forming flocs that then enter the subsequent sedimentation and separation stage.

7. The wastewater treatment system according to claim 5, characterized in that, The acquisition module also includes a dosing pump frequency meter, which is electrically connected to the dosing pump group and is used to monitor and acquire the operating frequency of the dosing pump group in real time, and transmit the operating frequency to the PLC control module.

8. The wastewater treatment system according to claim 5, characterized in that, The data acquisition module also includes an electromagnetic flow meter, which is installed at the outlet of the dosing pump group and is used to measure the amount of chemicals added by the dosing pump group. The electromagnetic flowmeter includes a first electromagnetic flowmeter and a second electromagnetic flowmeter. The first electromagnetic flowmeter is connected to the outlet end of the first dosing pump, and the second electromagnetic flowmeter is connected to the outlet end of the second dosing pump.

9. The wastewater treatment system according to claim 1, characterized in that, The wastewater treatment system also includes an alarm module, which is communicatively connected to the second acquisition module and is used to issue alarm signals.

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