Dynamic regulation and control water treatment method based on seasonal water quality fluctuation

Abstract

The invention provides a dynamic regulation and control water treatment method based on seasonal water quality fluctuation, and the method comprises the steps: obtaining the suspended matter concentration, PH value and temperature of effluent at an outlet of a pretreatment subsystem in a water treatment system, and the organic matter content of effluent at an outlet of a coagulation subsystem in the water treatment system; the content of microorganisms at an outlet of a disinfection subsystem in the water treatment system is measured; the aeration intensity of a backwashing pipeline at the bottom of a multi-stage filtering subsystem in the water treatment system, the coagulant adding amount of a coagulant adding device of a coagulation subsystem in the water treatment system and the ozone adding amount of an ozone generator of a disinfection subsystem in the water treatment system are calculated; according to the method and the device, the water treatment efficiency and the stability of the effluent quality in different seasons can be improved, so that the high efficiency and the stability of the effluent quality are ensured.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a water treatment method that dynamically controls seasonal water quality fluctuations. Background Art

[0002] As water pollution becomes increasingly prominent, water treatment technology plays an increasingly important role in ensuring the safety and sustainable use of water resources. Especially in scenarios where seasonal water quality fluctuates significantly, the development of water treatment methods that can be dynamically controlled has gradually become a research hotspot. Traditional water treatment technologies typically use fixed process parameters and equipment configurations, making it difficult to adapt to water quality differences caused by seasonal changes, such as changes in the concentration of suspended solids, organic matter, and heavy metal ions. This fixed design model often leads to decreased water treatment efficiency or unstable effluent quality in different seasons, which cannot meet the requirements of modern water treatment for high efficiency and stability. Summary of the Invention

[0003] In view of this, an embodiment of the present application provides a dynamic water treatment method based on seasonal water quality fluctuations to improve the efficiency of water treatment and the stability of effluent water quality in different seasons, thereby ensuring efficient and stable effluent water quality.

[0004] The present invention provides a method for dynamically regulating water treatment based on seasonal water quality fluctuations. The method is used to adjust process parameters of a water treatment system. The method includes: After obtaining the suspended solids concentration, pH value and temperature of the effluent at the outlet of the pretreatment subsystem in the water treatment system, the organic matter content of the effluent at the outlet of the coagulation subsystem in the water treatment system, and the microbial content at the outlet of the disinfection subsystem in the water treatment system, the aeration intensity of the backwash pipeline at the bottom of the multi-stage filtration subsystem in the water treatment system is calculated according to the following formula: ; in, are input variables, namely suspended solids concentration, pH value and temperature, is the number of input variables, is the weight coefficient of each input variable, is the variable currently input, is the bias term; The coagulant dosage of the coagulant dosing device of the coagulation subsystem in the water treatment system is calculated according to the following formula: ; in, T is the temperature, S is the suspended solids concentration,O is the organic matter content, C 0 is the basic dosage of coagulant, 、 、 are weight coefficients respectively; The ozone dosage of the ozone generator of the disinfection subsystem in the water treatment system is calculated according to the following formula: ; in, M is the microbial content, P is the pH value, D 0 is the basic dosage of ozone, 、 b is the weight coefficient; The dosages of the backwash pipeline, the coagulant dosing device and the ozone generator are controlled respectively according to the aeration intensity, the coagulant dosage and the ozone dosage.

[0005] The technical solutions provided by the embodiments of the present application may have the following beneficial effects: The present application obtains the suspended solids concentration, pH value and temperature of the effluent at the outlet of the pretreatment subsystem in the water treatment system, the organic matter content of the effluent at the outlet of the coagulation subsystem in the water treatment system, and the microbial content at the outlet of the disinfection subsystem in the water treatment system, and calculates the aeration intensity of the backwash pipeline at the bottom of the multi-stage filtration subsystem in the water treatment system, the coagulant dosage of the coagulant dosage device in the coagulation subsystem in the water treatment system, and the ozone dosage of the ozone generator in the disinfection subsystem in the water treatment system, so as to control the corresponding devices according to the above-mentioned data. Through the above-mentioned control, the process parameters of the water treatment system can be adaptively adjusted according to seasonal changes, which is beneficial to improve the efficiency of water treatment and the stability of effluent water quality in different seasons, thereby ensuring the high efficiency and stability of effluent water quality.

[0006] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0008] Figure 1A schematic flow chart of a water treatment method for dynamic regulation based on seasonal water quality fluctuations provided in an embodiment of the present application; Figure 2 A process flow chart of a water treatment system provided in an embodiment of the present application; Figure 3 A process flow chart of a pre-processing subsystem provided in an embodiment of the present application; Figure 4 A process flow chart of a coagulation subsystem provided in an embodiment of the present application; Figure 5 A process flow chart of a multi-stage filtration subsystem provided in an embodiment of the present application; Figure 6 A process flow chart of a disinfection subsystem provided in an embodiment of the present application. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0010] In the prior art, patent publication number CN103739124B proposes a high-efficiency water treatment system comprising a heavy medium coagulation reaction tank, a rapid sedimentation tank, a membrane tank, and other units. This system achieves high effluent quality and economic efficiency through heavy medium recycling and a multi-stage treatment process. However, this technical solution has poor adaptability to water quality fluctuations. Its process parameters are primarily based on fixed water quality conditions and cannot be dynamically adjusted based on seasonal water quality changes. Furthermore, the system has a low degree of automation and relies on manual adjustments, making it difficult to achieve real-time response to complex water quality changes.

[0011] Another patent with publication number CN106186318B proposes a sludge film composite SBR water treatment process. By dividing the SBR pool into two regions and combining sludge return and aeration process, the volumetric loading and effluent quality are improved. However, this technical solution also lacks the ability to specifically regulate seasonal water quality fluctuations. The operation cycle and process parameters are set based on static water quality conditions, without fully considering the changes in water quality composition in different seasons (such as reduced microbial activity under low temperature conditions in winter or increased suspended solids concentration in rainy season, etc.). In addition, this process requires higher experience of the operator, and there may be a problem of regulation lag in actual application, further limiting its adaptability and stability.

[0012] The above problems show that the existing water treatment technology has obvious shortcomings in dealing with seasonal water quality fluctuations, mainly in the following aspects: first, the process parameters are fixed and cannot be dynamically adjusted according to water quality changes; second, the automation level is low, making it difficult to achieve real-time monitoring and intelligent regulation; third, the adaptability to complex water quality conditions is limited, which may lead to decreased treatment efficiency or increased operating costs. Therefore, it is urgent to develop a dynamic regulation water treatment method based on seasonal water quality fluctuations, which introduces an intelligent regulation mechanism and dynamically optimizes process parameters based on real-time monitoring data, to improve the adaptability and stability of the water treatment system, thereby meeting the demand for efficient and intelligent technology in the modern water treatment field.

[0013] It should be noted that the online water quality detection unit in the present application includes various types of sensors, and the specific type of sensor needs to be set according to the collected data.

[0014] The embodiments of the present application are described in detail below.

[0015] Figure 1 A flowchart of a dynamic regulation water treatment method based on seasonal water quality fluctuations provided by the embodiments of the present application, the dynamic regulation water treatment method is used to adjust the process parameters of the water treatment system, such as Figure 1 As shown, the method comprises the following steps: Step 101, after obtaining the suspended solids concentration, PH value and temperature of the effluent at the outlet of the pretreatment subsystem in the water treatment system, the organic matter content of the effluent at the outlet of the coagulation subsystem in the water treatment system, and the microbial content at the outlet of the disinfection subsystem in the water treatment system, the aeration intensity of the backwash pipeline set at the bottom of the multi-stage filtration subsystem in the water treatment system is calculated according to formula one: (Formula one); Wherein, is an input variable, respectively the suspended solids concentration, the PH value and the temperature, is the number of input variables, is the weight coefficient of each input variable, is the variable currently input, is the bias term.

[0016] Step 102: Calculate the coagulant dosage of the coagulant dosing device of the coagulation subsystem in the water treatment system according to Formula 2: (Formula 2); in, T is the temperature, S is the suspended matter concentration, O is the organic matter content, C 0 is the basic dosage of coagulant, 、 、 are weight coefficients respectively.

[0017] Step 103: Calculate the ozone dosage of the ozone generator of the disinfection subsystem in the water treatment system according to Formula 3: (Formula 3); in, M is the microbial content, P is the pH value, D 0 is the basic dosage of ozone, 、 b is the weight coefficient.

[0018] Step 104 : Control the dosage of the backwash pipeline, the coagulant dosing device, and the ozone generator respectively according to the aeration intensity, the coagulant dosage, and the ozone dosage.

[0019] Specifically, the present application obtains the suspended solids concentration, pH value and temperature of the effluent at the outlet of the pretreatment subsystem in the water treatment system, the organic matter content of the effluent at the outlet of the coagulation subsystem in the water treatment system, and the microbial content at the outlet of the disinfection subsystem in the water treatment system, and calculates the aeration intensity of the backwash pipeline at the bottom of the multi-stage filtration subsystem in the water treatment system, the coagulant dosage of the coagulant dosage device in the coagulation subsystem in the water treatment system, and the ozone dosage of the ozone generator in the disinfection subsystem in the water treatment system, so as to control the corresponding devices according to the above-mentioned data. Through the above-mentioned control, the process parameters of the water treatment system can be adaptively adjusted according to seasonal changes, which is beneficial to improve the efficiency of water treatment and the stability of effluent water quality in different seasons, thereby ensuring the high efficiency and stability of effluent water quality.

[0020] It should be noted that the weight coefficient of each input variable and bias It is obtained through continuous optimization of neural network training; the unit of coagulant dosage is mg / L, the unit of temperature is ℃, the unit of suspended solids concentration is mg / L, the unit of organic matter content is mg / L, and the unit of coagulant basic dosage is mg / L. 、 、 It is obtained by fitting experimental data. For low temperature water quality in winter, The value range is 0.1-0.3, The value range is 0.05-0.1, The value range is 0.2-0.5; the unit of basic ozone dosage is mg / L, the unit of microbial content is CFU / mL, and the unit of basic ozone dosage is mg / L. The value range is 0.5-1.0, b The value range is 0.1-0.3; if the microbial content is high, the disinfection effect can be enhanced by increasing the ozone dosage or extending the ultraviolet irradiation time.

[0021] In one possible embodiment, Figure 2 A process flow chart of a water treatment system provided in an embodiment of the present application is as follows: Figure 2 As shown, the water treatment system consists of two parts: one is the process treatment system (including: pretreatment subsystem, coagulation subsystem, multi-stage filtration subsystem and disinfection subsystem), and the other is the control system (online water quality detection unit and central control unit, Figure 2 In the figure, the dotted arrows represent the process flow, and the solid arrows represent parameter collection and control. The central control unit is used to control each execution structure in the process processing system. The control system can collect process parameters in the process processing system and then pass the collected parameters to the process processing system. Figure 1 The method shown is used to calculate and then control the process system, such as Figure 2 As shown, the raw water flows through the pretreatment subsystem, the coagulation subsystem, the multi-stage filtration subsystem and the disinfection subsystem in sequence and is then stored in a clean water storage tank, wherein the pretreatment subsystem is used to perform preliminary treatment on the water quality, the coagulation subsystem is used to promote floc formation, the multi-stage filtration subsystem is used to filter the water quality, and the disinfection subsystem is used to disinfect the water quality.

[0022] The online water quality detection unit is arranged at the outlet of the pretreatment subsystem, for collecting the suspended solids concentration, the pH value, the temperature and the organic matter content, and is arranged at the outlet of the coagulation subsystem, for collecting the organic matter content, and is arranged at the outlet of the disinfection subsystem, for collecting the microbial content; the dynamic control water treatment method runs in the central control system, and the actuator includes the coagulant dosing device, the backwash pipeline and the ozone generator, and the coagulant dosage of the coagulant dosing device, the aeration intensity of the backwash pipeline and the ozone dosage of the ozone generator are controlled by the central control system.

[0023] like Figure 2 As shown, the water treatment system also includes a data storage and analysis unit for recording historical data and performing trend prediction.

[0024] In one possible embodiment, Figure 3 A process flow chart of a pre-processing subsystem provided in an embodiment of the present application is shown as follows: Figure 3 As shown ( Figure 3 The dashed arrows indicate process flow, the solid arrows indicate parameter collection, and the solid lines indicate connectivity. The pretreatment subsystem includes a coarse screen, a fine screen, and a regulating tank, arranged sequentially along the raw water flow path. The coarse and fine screens are used to remove impurities of varying particle sizes. The regulating tank is equipped with a stirring device to homogenize the water quality, with the stirring speed adjusted by the central control unit. The regulating tank is connected to an acid-base adjustment device, which performs a preliminary adjustment on the pH of the water entering the regulating tank. The dosage of the acid-base adjustment device is adjusted by the central control unit. An online water quality monitoring unit is located at the outlet of the regulating tank to collect basic parameters such as suspended solids concentration, pH, and temperature. These parameters are collected by the online water quality monitoring unit via a data transmission line, providing a basis for subsequent process parameter adjustments. In actual operation, when raw water enters the pretreatment subsystem, the coarse screen first intercepts large impurities, followed by the fine screen to further remove smaller particles. The stirring device in the regulating tank adjusts its stirring speed based on instructions from the central control unit to ensure uniform water quality and quantity. The acid-base regulating device dynamically adjusts the dosage according to the pH value data collected by the online water quality monitoring unit to make the pH value of the effluent reach the set range.

[0025] In one possible embodiment, Figure 3 As shown, a mud discharge port is provided at the bottom of the regulating tank and an overflow port is provided at the top to ensure the stability of water quality and water quantity.

[0026] In one possible embodiment, Figure 4A process flow chart of a coagulation sub-system provided in an embodiment of the present application is shown in Figure 4 Figure 4 The dashed arrow indicates the process flow direction, the solid arrow indicates the control, and the solid line indicates the communication. The coagulation sub-system comprises a coagulation reaction tank and a flocculation reaction tank arranged in sequence along the flow direction of raw water. The coagulation reaction tank is provided with an adjustable speed stirrer, and the stirring speed ranges from 100 to 300 r / min. The coagulation reaction tank is in communication with a coagulant dosing device. The coagulant dosing device comprises a storage tank, a metering pump, and a dosing pipeline. The metering pump adjusts the coagulant dosage according to the instruction of the central control unit. The flocculation reaction tank is provided with a low-speed stirrer, and the stirring speed ranges from 30 to 80 r / min. The low-speed stirrer is used for low-speed stirring to promote the formation of flocs. The outlet of the flocculation reaction tank is provided with the online water quality detection unit.

[0027] It should be noted that the online water quality detection unit can also collect other water quality parameters of the coagulation sub-system, such as water turbidity, conductivity, and the like. The specific type of online water quality detection unit can be set according to the type of data to be collected, which is not limited here.

[0028] In a feasible embodiment, as shown in Figure 4 The coagulation sub-system further comprises an inclined plate sedimentation tank and a sludge concentration tank. After flocculation, the water body is subjected to solid-liquid separation in the inclined plate sedimentation tank. The inclined plate sedimentation tank is provided with a sludge discharge valve at the bottom, through which the sludge is discharged to the sludge concentration tank. The sludge concentration tank is connected to a sludge treatment system through a sludge pump.

[0029] Specifically, in actual operation, the effluent from the adjustment tank enters the coagulation reaction tank and is fully mixed with the coagulant under stirring conditions. The stirring speed of the adjustable speed stirrer can be dynamically adjusted by the central control unit according to the online water quality monitoring data to ensure the best coagulation effect, or a constant stirring speed is adopted. After coagulation, low-speed stirring is performed in the flocculation reaction tank to promote the formation of flocs. After flocculation, solid-liquid separation is performed in the inclined plate sedimentation tank, and the sludge is transported to the sludge concentration tank through a sludge pump. In this process, the coagulant dosage can be dynamically adjusted according to the method shown in Figure 1

[0030] ​​In a feasible embodiment, the coagulation reaction tank and the flocculation reaction tank are both provided with heating devices for increasing water temperature under low temperature conditions, thereby enhancing the coagulation effect, especially under the conditions of low temperature in winter and high suspended substance concentration in rainy season, the coagulation efficiency and the effluent water quality are effectively improved through the heating devices and the dynamic coagulant dosing strategy, wherein the heating devices are automatically started and stopped by the central control unit according to the temperature parameter in the monitoring data; the coagulant in the coagulant dosing device is a composite high molecular polymer, including polyacrylamide and chitosan; the coagulant dosing device further includes a dissolving tank and a stirrer for fully dissolving the coagulant.

[0031] In a feasible embodiment, Figure 5 A process flow chart of a multi-stage filtration sub-system provided for the embodiment of the present application is shown in Figure 5 Figure 5 The dashed arrows represent the process flow direction, and the solid arrows represent the control. The multi-stage filtration sub-system includes a sand filter tank, an activated carbon filter tank and a precision filter arranged in sequence along the direction of raw water flow, the supernatant obtained after the solid-liquid separation of the inclined plate sedimentation tank flows to the sand filter tank; the sand filter tank is filled with quartz sand of different particle sizes for removing suspended particles; the activated carbon filter tank is filled with modified activated carbon for adsorbing organic matter and heavy metal ions; the precision filter is provided with multiple layers of microporous filter membranes for removing micro-particles and colloidal substances; the sand filter tank and the activated carbon filter tank are both provided with the backwashing pipeline at the bottom; the modified activated carbon forms carboxyl and hydroxyl functional groups through oxidation modification treatment; the specific surface area of the modified activated carbon is greater than 1200 m² / g, and the iodine value is greater than 1000 mg / g, wherein the aeration intensity of the backwashing pipeline is dynamically controlled according to the method shown in Figure 1 to ensure the best filtration effect.

[0032] Specifically, in actual operation, the supernatant of the inclined plate sedimentation tank sequentially passes through the sand filter tank, the activated carbon filter tank and the precision filter for multi-stage filtration. The sand filter tank effectively removes suspended particles through quartz sand of different particle sizes, the activated carbon filter tank adsorbs organic matter and heavy metal ions through modified activated carbon, thereby ensuring the efficient and stable effluent water quality, and the precision filter further removes micro-particles and colloidal substances. The aeration intensity directly affects the backwashing intensity of the backwashing pipeline, and the modified activated carbon is rich in carboxyl and hydroxyl functional groups on the surface through oxidation modification treatment, thereby having stronger adsorption capacity.

[0033] It should be noted that the online water quality monitoring unit can also be installed at the outlet of the multi-stage filtration sub-system for collecting the water quality parameters after filtration.

[0034] In a feasible embodiment, Figure 6 A process flow chart of a disinfection sub-system provided for the embodiment of the present application is shown in Figure 6 ​The dotted arrows represent the process flow direction, and the solid arrows represent the control. Figure 5 The disinfection sub-system also includes an ultraviolet sterilizer, the water body flowing through the precision filter flows to the ozone generator, the ozone generator is connected with the clean water pipeline through a gas-liquid mixer, the ultraviolet sterilizer is arranged at the end of the clean water pipeline, the end of the clean water pipeline is communicated with the clean water storage tank, and the end of the clean water pipeline is provided with the online water quality detection unit.

[0035] Specifically, in actual operation, the water filtered by the multi-stage filter enters the clean water pipeline and is disinfected by the ozone generator and the ultraviolet sterilizer. The ozone dosage is dynamically adjusted according to the water quality monitoring data Figure 1 The method is shown In a feasible embodiment, the clean water storage tank is provided with a liquid level sensor and a water quality sensor, and the outlet of the clean water storage tank is provided with the online water quality monitoring unit for obtaining the water quality parameters of the clean water storage tank. The liquid level sensor and the water quality sensor monitor the clean water storage and the water quality in real time, so as to ensure that the effluent water quality is efficient and stable.

[0036] As Figures 1-6 As shown, in actual application scenarios, for example, a certain city water treatment plant uses the method of the present application to treat raw water with large seasonal water quality fluctuations. During the rainy season in summer, the suspended solids concentration of raw water is high. The central control unit dynamically adjusts the process parameters, even the stirring speed, according to the online water quality monitoring data to ensure the best coagulation effect. Under low temperature conditions in winter, the heating device is started to improve the water temperature to enhance the coagulation effect, and the coagulant dosage is dynamically adjusted to ensure that the effluent water quality is efficient and stable. The modified activated carbon in the multi-stage filtration module significantly enhances the removal capacity of organic matter and heavy metal ions, ensuring that the effluent water quality meets the standard. The post-treatment module enhances the disinfection effect through the ozone generator and the ultraviolet sterilizer, and the final effluent enters the clean water storage tank for storage. The liquid level sensor and the water quality sensor monitor the clean water storage and the water quality in real time to ensure that the effluent water quality is efficient and stable.

[0037] In summary, the present application realizes real-time response and dynamic regulation and control of water quality fluctuations through intelligent monitoring and control, significantly improving the adaptability and stability of the water treatment system. Especially under the conditions of low temperature in winter and high suspended solids concentration in rainy season, the coagulation efficiency and effluent water quality are effectively improved through the heating device and dynamic adjustment strategy. The modified activated carbon in the multi-stage filtration module further enhances the removal capacity of organic matter and heavy metal ions, ensuring the efficient and stable effluent water quality.

[0038] In the embodiments of the present application, it should be understood that the disclosed apparatus and method can be implemented in other manners. The embodiments described above are merely exemplary, for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, and electrical, mechanical or other forms.

[0039] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0040] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0041] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0042] It should be noted that: similar reference numerals and letters in the following drawings represent similar items, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0043] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any person skilled in the art can make modifications or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features within the technical scope disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. All should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A water treatment method for dynamic regulation based on seasonal water quality fluctuations, characterized in that: The dynamic water treatment control method is used to adjust the process parameters of the water treatment system, and the method includes: After obtaining the suspended solids concentration, pH value and temperature of the effluent at the outlet of the pretreatment subsystem in the water treatment system, the organic matter content of the effluent at the outlet of the coagulation subsystem in the water treatment system, and the microbial content at the outlet of the disinfection subsystem in the water treatment system, the aeration intensity of the backwash pipeline at the bottom of the multi-stage filtration subsystem in the water treatment system is calculated according to the following formula: in, are input variables, namely suspended solids concentration, pH value and temperature, is the number of input variables, is the weight coefficient of each input variable, is the variable currently input, is the bias term; The coagulant dosage of the coagulant dosing device of the coagulation subsystem in the water treatment system is calculated according to the following formula: in, T is the temperature, S is the suspended matter concentration, O is the organic matter content, C 0 is the basic dosage of coagulant, 、 、 are weight coefficients respectively; The ozone dosage of the ozone generator of the disinfection subsystem in the water treatment system is calculated according to the following formula: in, M is the microbial content, P is the pH value, D 0 is the basic dosage of ozone, 、 b is the weight coefficient; The dosages of the backwash pipeline, the coagulant dosing device and the ozone generator are controlled respectively according to the aeration intensity, the coagulant dosage and the ozone dosage.

2. The dynamic water treatment method according to claim 1, wherein: The pretreatment subsystem is used to perform preliminary treatment on the water quality, the coagulation subsystem is used to promote floc formation, the multi-stage filtration subsystem is used to filter the water quality, and the disinfection subsystem is used to disinfect the water quality. The raw water flows through the pretreatment subsystem, the coagulation subsystem, the multi-stage filtration subsystem and the disinfection subsystem in sequence and is then stored in the clean water storage tank; The water treatment system further includes: an online water quality detection unit, a central control unit and an actuator, wherein the online water quality detection unit is arranged at the outlet of the pretreatment subsystem, for collecting the suspended solids concentration, the pH value, the temperature and the organic matter content, and is arranged at the outlet of the coagulation subsystem, for collecting the organic matter content, and is arranged at the outlet of the disinfection subsystem, for collecting the microbial content; the dynamic regulation water treatment method is operated in the central control system, the actuator includes the coagulant dosing device, the backwash pipeline and the ozone generator, and the coagulant dosage of the coagulant dosing device, the aeration intensity of the backwash pipeline and the ozone dosage of the ozone generator are controlled by the central control system; The water treatment system further comprises a data storage and analysis unit for recording historical data and performing trend prediction.

3. The dynamic water treatment method according to claim 2, wherein: The pretreatment subsystem includes a coarse screen, a fine screen and a regulating tank arranged in sequence along the flow direction of the raw water, wherein the coarse screen and the fine screen are used to remove impurities of different particle sizes; a stirring device is provided in the regulating tank for uniform water quality, and the stirring speed of the stirring device is adjusted by the central control unit; the regulating tank is connected to the acid-base regulating device, and the acid-base regulating device is used to preliminarily adjust the pH value of the water body entering the regulating tank, and the dosage of the acid-base regulating device is adjusted by the central control unit. The online water quality detection unit is provided at the outlet of the regulating tank.

4. The dynamic water treatment method according to claim 3, wherein: The regulating tank is provided with a mud discharge port at the bottom and an overflow port at the top to ensure the stability of water quality and water quantity.

5. The dynamic water treatment method according to claim 2, wherein: The coagulation subsystem includes a coagulation reaction tank and a flocculation reaction tank sequentially arranged along the flow direction of the raw water. The coagulation reaction tank is provided with an adjustable speed agitator with a stirring speed range of 100-300 r / min. The coagulation reaction tank is connected to the coagulant dosing device, and the coagulant dosing device includes a drug storage tank, a metering pump and a dosing pipeline. The metering pump adjusts the coagulant dosage according to the instruction of the central control unit; A low-speed stirrer is provided in the flocculation reaction tank, and the stirring speed range is 30-80 r / min. The low-speed stirrer is used for performing low-speed stirring to promote floc formation. The online water quality detection unit is provided at the outlet of the flocculation reaction tank.

6. The dynamic water treatment method according to claim 5, characterized in that: The coagulation subsystem also includes: an inclined plate sedimentation tank and a sludge thickening tank. After flocculation, the water body passes through the inclined plate sedimentation tank for solid-liquid separation. A sludge discharge valve is provided at the bottom of the inclined plate sedimentation tank, and the sludge is discharged to the sludge thickening tank through the sludge discharge valve. The sludge thickening tank is connected to the sludge treatment system through a sludge pump.

7. The dynamic water treatment method according to claim 5, characterized in that: The coagulation reaction tank and the flocculation reaction tank are both provided with heating devices; the coagulant in the coagulant adding device is a composite high molecular polymer including polyacrylamide and chitosan; the coagulant adding device also includes a dissolving tank and a stirrer.

8. The dynamic control water treatment method according to claim 5, characterized in that: The multi-stage filtration subsystem includes a sand filter, an activated carbon filter and a precision filter arranged in sequence along the direction of raw water flow. The supernatant obtained after solid-liquid separation in the inclined plate sedimentation tank flows to the sand filter; the sand filter is filled with quartz sand of different particle sizes for removing suspended particles; the activated carbon filter is filled with modified activated carbon for adsorbing organic matter and heavy metal ions; the precision filter is provided with a multi-layer microporous filter membrane for removing tiny particles and colloidal substances; the backwash pipeline is provided at the bottom of the sand filter and the activated carbon filter; the modified activated carbon is subjected to oxidation modification treatment to form carboxyl and hydroxyl functional groups; the specific surface area of ​​the modified activated carbon is greater than 1200m² / g, and the iodine value is greater than 1000mg / g.

9. The dynamic water treatment method according to claim 8, wherein: The disinfection subsystem also includes an ultraviolet sterilizer. The water flowing through the precision filter flows to the ozone generator. The ozone generator is connected to the clean water pipe through a gas-liquid mixer. The ultraviolet sterilizer is arranged at the end of the clean water pipe. The end of the clean water pipe is connected to the clean water storage tank. The online water quality detection unit is provided at the end of the clean water pipe.

10. The dynamic control water treatment method according to claim 9, characterized in that: A liquid level sensor and a water quality sensor are provided in the clean water storage tank, and the online water quality monitoring unit is provided at the outlet of the clean water storage tank for obtaining the water quality parameters of the clean water storage tank.

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