Dual-function waterworks automatic dosing device

Abstract

The utility model provides a dual-function waterworks automatic dosing device. A permanganate pre-oxidation combined Fe (III) / PMS advanced oxidation / enhanced coagulation process is taken as a core. The system comprises a pretreatment unit, an automatic dosing control system program unit, an MFP process automatic dosing unit, an online instrument device, a central processing unit device and a metering pump device. The system detects the water quality of raw water on line and sends data to the central processing unit device, and the central processing unit device determines the drug feeding amount through calculation. And the metering pump device is used for feeding permanganate, Fe (III) and PMS into the pretreatment unit, so that enhanced coagulation and oxidation are realized. After treatment, the online instrument device detects the water quality, and the central processing unit device processes data through an automatic dosing control system program unit, determines the optimal dosing amount and dosing ratio and feeds back the optimal dosing amount and dosing ratio to the metering pump device so as to reduce drug consumption.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to a dual-function automatic dosing device for a waterworks. Background Art

[0002] Over the past few decades, eutrophication and algal blooms have become frequent. Since 1980, summer algal blooms have intensified in many lakes around the world. The 2017-2022 "China Ecological Environment Bulletin" shows that the main water quality indicators exceeding standards at my country's domestic water sources have shifted from inorganic indicators to organic indicators such as "chemical oxygen demand."

[0003] With economic and technological progress, people's yearning for a better life is increasingly being realized, and their requirements for drinking water quality are also becoming increasingly higher. To meet these higher demands for drinking water quality, the national level has promulgated more stringent drinking water quality standards and related environmental protection laws and policies. Therefore, to cope with increasingly severe water quality issues and the ever-increasing drinking water quality requirements, and to respond to the national "dual carbon" policy, drinking water suppliers urgently need a new and efficient water treatment method.

[0004] The currently available technologies for water treatment still have some shortcomings that need to be continuously improved:

[0005] (1) The conventional process based on “coagulation-sedimentation-filtration-disinfection” with chlorine disinfection as the core (CN116621317A) has limited efficiency in treating organic matter, especially for new pollutants such as disinfection by-product precursors and PPCPs. Its treatment effect can no longer meet the human health requirements for drinking water quality.

[0006] (2) The second-generation water treatment process has high construction costs, a long construction period, and occupies a large area. The use of the second-generation water treatment process requires the installation of new ozone tanks, activated carbon tanks, ozone generators, etc. (CN116621400A), which requires a lot of manpower, material resources, and time costs, and requires a large amount of land. The investment cost is in the billions and is not suitable for upgrading water plants in all regions. At the same time, the generation of ozone requires high voltage electricity as a reaction condition, and the electricity consumed in this process leads to large carbon emissions.

[0007] (3) The third generation of water treatment process ultrafiltration membrane (CN116282384A) is expensive and difficult to operate and maintain, making it difficult to be widely popularized and applied. Membrane fouling is a key issue that limits its widespread application and is also an important factor limiting the development of membrane materials and membrane technology. The formation of membrane fouling reduces the water production capacity of the membrane and also changes the membrane's removal efficiency of other water pollutants; at the same time, the aggravation of the fouling will reduce the water permeability of the membrane and increase the energy consumption of the process operation. At the same time, although ultrafiltration membrane technology can effectively remove particulate matter in water, such as pathogenic microorganisms, it is difficult to remove small molecular weight organic pollutants and soluble toxic and harmful inorganic substances (such as ammonia nitrogen, heavy metal ions, etc.) in water, and is not suitable for treating high turbidity water. Summary of the Invention

[0008] The purpose of this utility model is to provide a dual-function automatic dosing device for water plants that saves energy and reduces emissions, has low treatment costs, generates no treatment by-products, reduces pressure in subsequent water treatment processes, and improves water purification process efficiency and effluent quality.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A dual-function automatic dosing device for a waterworks, used for precisely controlling the proportion and dosage of chemicals during the treatment of raw water in a process treatment unit, thereby improving the removal rate of organic matter in the raw water; comprising a database, an automatic dosing unit, an online instrument device, a central processing unit and a metering pump device; the automatic dosing unit is connected to the process treatment unit via a metering pump device for dosing chemicals; the online instrument device comprises two groups, each for detecting data information of the raw water before treatment and of the raw water after treatment; the database is used for storing data information detected by the two groups of online instrument devices, and transmitting the data information to the central processing unit; the central processing unit is used for processing the data information detected by the two groups of online instrument devices, and according to the processing results, using the automatic dosing unit to add chemicals to the raw water of the process treatment unit via the metering pump device.

[0011] Preferably, the online instrument device adopts two groups, one group of the online instrument device is set before the raw water is added with the chemical in the process treatment unit, and is used to detect the data information of the raw water before the chemical is added; the other group of the online instrument device is set after the raw water is added with the chemical in the process treatment unit, and is used to detect the data information of the raw water after the chemical is added.

[0012] Preferably, the process treatment unit includes raw water entering a mixing device, a flocculation tank, a sedimentation tank, a sand filter, a deep treatment unit and a clear water tank in sequence and then discharging the water; wherein, the mixing device is connected to the metering pump device for mixing the chemicals injected by the metering pump device; a group of online instrument devices are arranged before the mixing device for detecting data information of the raw water before the injection of chemicals, including the turbidity of the raw water, the pH value of the raw water and the temperature of the raw water; another group of online instrument devices are arranged between the sedimentation tank and the sand filter for detecting data information of the raw water after the injection of chemicals, including the dissolved organic carbon (DOC) of the raw water and the turbidity of the raw water.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This utility model incorporates two sets of online instrumentation within the process treatment unit, simulating human thinking to collect and process data. This system employs varying control levels based on water quality changes, improving the system's dynamic steady-state performance. By adding chemicals to the process treatment unit via a metering pump, this system automatically adjusts the amount of chemicals added during the raw water treatment process. This system addresses issues such as nonlinearity, time-varying effects, and delayed efficacy of chemical dosing, drawing on practical experience gained from manual dosing adjustments. Fuzzy weighted control of chemical dosage is implemented based on the impact of raw water flow and turbidity changes on turbidity output. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a dual-function automatic drug dispensing device for a waterworks provided in this embodiment;

[0016] Figure 2 This is a schematic diagram of detecting each group of dissolved organic carbon (DOC) indicators in Comparative Example 1 of a dual-function automatic dosing device for a water plant provided in this embodiment;

[0017] Figure 3 This is a schematic diagram of detecting each group of dissolved organic carbon (DOC) indicators in Comparative Example 2 of a dual-function automatic drug dispensing device for a water plant provided in this embodiment.

[0018] The serial numbers in the figure are as follows:

[0019] 1. Processing unit; 2. Database; 3. Automatic dosing unit; 4. Online instrument device; 5. Central processing unit; 6. Metering pump device. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example

[0022] Figure 1 This is a structural diagram of a dual-function automatic drug dispensing device for a water plant provided in this embodiment.

[0023] like Figure 1 The figure shows a dual-function automatic dosing device for waterworks provided in this embodiment. This device is suitable for the "coagulation" process in waterworks treatment. It enhances coagulation through advanced oxidation methods, improving the removal rate of small-molecule organic matter. The device includes a database 2, an automatic dosing unit 3, two sets of online instrumentation 4, a central processing unit 5, and a metering pump 6.

[0024] Process treatment unit 1 includes a mixing device, a flocculation tank, a sedimentation tank, a sand filter, an advanced treatment unit, and a clear water tank. Raw water enters the mixing device, flocculation tank, sedimentation tank, sand filter, advanced treatment unit, and clear water tank in sequence before exiting. Disinfectant is added between the advanced treatment unit and the clear water tank.

[0025] The automatic dosing unit 3 is connected to the mixing device in the process treatment unit 1 through the metering pump device 6. The mixing device is arranged before the flocculation tank and the sedimentation tank, and is used to mix the medicine dosed by the metering pump device 6.

[0026] In this embodiment, the metering pump device 6 includes permanganate, Fe(III), and PMS. The permanganate is KMnO4 with a dosage range of 0.1-0.8 mg / L, the Fe(III) is FeCl3 with a dosage range of 60-120 μM, and the PMS has a dosage range of 20-80 μM.

[0027] One of the two sets of online instrumentation devices 4 is located before the mixing device and is used to monitor raw water data before the addition of the chemical, including turbidity, pH, and temperature. The other set of online instrumentation devices 4 is located between the sedimentation tank and the sand filter and is used to monitor raw water data after the addition of the chemical, including dissolved organic carbon (DOC) and turbidity.

[0028] The online instrument device 4 transmits the detected data information to the database 2, which is built by the neural network and genetic algorithm. The database 2 stores the data information and transmits it to the central processing unit 5;

[0029] The neural network algorithm and neural network model preset in the central processing unit 5 perform calculation processing on the data information, and the processing results are used by the automatic dosing unit 3 to add the medicine to the process processing unit 1 according to the processing ratio and quantity through the metering pump device 6.

[0030] This embodiment also provides an application method of an automatic dosing unit for a water plant based on the dual functions of oxidation and coagulation, and the steps are as follows:

[0031] Step S0: Setting and installation: In the process treatment unit 1, raw water sequentially enters the mixing device, flocculation tank, sedimentation tank, sand filter, deep treatment unit and clear water tank before being discharged.

[0032] First, a set of online instrument devices 4 is set before the raw water in the process treatment unit 1 is added with chemicals to perform online detection of the data information of the raw water turbidity, raw water pH value and raw water temperature after the chemicals are added.

[0033] Another set of online instrument devices 4 is provided between the sedimentation tank and the sand filter tank in the process treatment unit 1 to perform online detection of dissolved organic carbon (DOC) and turbidity data in the water after the addition of the chemical.

[0034] The mixing device is arranged before the flocculation tank and the sedimentation tank. The mixing device is connected to the automatic dosing system 3 via a metering pump device 6 . The mixing device is used to mix the medicines delivered by the metering pump device 6 .

[0035] Step S1: Raw water testing: A set of online instrument devices 4 performs online testing on the water quality of the raw water before the raw water is dosed with chemicals, and stores the acquired data information through the database 2 and sends it to the central processing unit 5. The tested data information includes the turbidity of the raw water, the pH value of the raw water, and the temperature of the raw water.

[0036] Step S2: Initial data processing and feedback: After the central processing unit 5 performs calculations and processing, it uses the automatic dosing unit 3 to send a dosing signal to the metering pump device 6.

[0037] Step S3: Initial Drug Dosing: The metering pump device 6 initially doses permanganate, Fe(III), and PMS to the mixing device in the process treatment unit 1. Permanganate is directly added to the raw water, while Fe(III) and PMS are added to the mixing device for mixing. The raw water to which permanganate is added combines with the pre-mixed Fe(III) and PMS to achieve enhanced coagulation and oxidation in the raw water.

[0038] Step S4: Post-treatment water quality detection: another set of online instrument devices 4 is used to perform online detection on the water quality after the drug is added, and the acquired data information is stored in the database 2 and sent to the central processing unit 5 again.

[0039] Step S5: Data processing and feedback again: the central processing unit 5 calculates the currently required dosage and dosage ratio, and uses the automatic dosage unit 3 to send a quantitative dosage signal to the metering pump device 6 again.

[0040] Step S6: Adjusting and delivering medicine: the metering pump device 6 delivers medicine for the second time according to the mixing device in the process unit 1, thereby achieving online adjustment of the medicine delivery amount to reduce the consumption of medicine.

[0041] This utility model installs two sets of online instrumentation within the process treatment unit, simulating human thinking to collect and process data. Based on a neural network algorithm and a negative feedback regulation mechanism that detects again after drug administration, it adopts different control forces according to changes in water quality, improving the system's dynamic steady-state performance. By adding chemicals to the process treatment unit via a metering pump device, it automatically adjusts the addition of chemicals during the raw water treatment process. This enables precise regulation of drug addition, effectively avoiding poor treatment results or drug waste caused by inappropriate drug dosage. This allows precise control of drug dosage based on real-time water quality data and calculation models, reducing water treatment costs and improving water treatment efficiency.

[0042] The utility model can address the problems of nonlinearity, time-varying and efficacy hysteresis of dosing treatment, summarize the practical experience of manual adjustment of dosing operation, and realize fuzzy weighted control of dosing amount according to the influence of changes in raw water flow and turbidity on turbidity output.

[0043] Comparative Example 1

[0044] Figure 2 This is a schematic diagram of detecting various groups of dissolved organic carbon (DOC) indicators in Comparative Example 1 of a dual-function automatic dosing device for a water plant provided in this embodiment.

[0045] like Figure 2 As shown in the figure, iohexol solution was selected, and "ferric chloride coagulation", "Mn (VII) pre-oxidation coupled with ferric chloride coagulation" and "Mn (VII) pre-oxidation coupled with ferric chloride / PMS coagulation" were used respectively to detect the dissolved organic carbon (DOC) index of each group and calculate the removal rate. Compared with the traditional iron coagulation process, the DOC removal rate was increased by more than 20%.

[0046] Comparative Example 2

[0047] Figure 3This is a schematic diagram of detecting various groups of dissolved organic carbon (DOC) indicators in Comparative Example 2 of a dual-function automatic dosing device for a water plant provided in this embodiment.

[0048] like Figure 3 As shown in the figure, reservoir raw water was selected, and "ferric chloride coagulation", "Mn (VII) pre-oxidation coupled with ferric chloride coagulation" and "Mn (VII) pre-oxidation coupled with ferric chloride / PMS coagulation" were used respectively to detect the dissolved organic carbon (DOC) index of each group and calculate the removal rate. Compared with the traditional iron coagulation process, the removal rate was increased by 20%, reaching about 60%.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0050] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual-function automatic dosing device for a waterworks, used for precisely controlling the proportion and dosage of chemicals during the treatment of raw water in a process treatment unit (1), thereby improving the removal rate of organic matter in the raw water; characterized in that: It includes a database (2), an automatic dosing unit (3), an online instrument device (4), a central processing unit (5) and a metering pump device (6); The automatic dosing unit (3) is connected to the process unit (1) via a metering pump device (6) for dosing the medicine; The online instrument device (4) adopts two groups, which are used to detect the data information of the raw water before treatment and the raw water after treatment respectively; The database (2) is used to store data information detected by the two sets of online instrument devices (4) and transmit the data information to the central processing unit (5); The central processing unit (5) is used to process the data information detected by the two groups of online instrument devices (4), and to add the agent to the raw water of the process treatment unit (1) by using the automatic dosing unit (3) through the metering pump device (6) according to the processing results.

2. A dual-function automatic drug dispensing device for waterworks according to claim 1, characterized in that: Of the two groups of online instrument devices (4), one group of online instrument devices (4) is arranged before the raw water is added with the reagent in the process treatment unit (1), and is used to detect data information of the raw water before the reagent is added; and the other group of online instrument devices (4) is arranged after the raw water is added with the reagent in the process treatment unit (1), and is used to detect data information of the raw water after the reagent is added.

3. A dual-function automatic drug dispensing device for waterworks according to claim 2, characterized in that: The process treatment unit (1) includes raw water sequentially entering a mixing device, a flocculation tank, a sedimentation tank, a sand filter, a deep treatment unit and a clear water tank before the water is discharged; Wherein, the mixing device is connected to the metering pump device (6) and is used to mix the medicine delivered by the metering pump device (6); A group of the online instrument devices (4) is arranged before the mixing device, and is used to detect data information of the raw water before the addition of the agent, including the turbidity of the raw water, the pH value of the raw water, and the temperature of the raw water; another group of the online instrument devices (4) is arranged between the sedimentation tank and the sand filter tank, and is used to detect data information of the raw water after the addition of the agent, including the dissolved organic carbon of the raw water and the turbidity of the raw water.

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