Lime coagulation clarification treatment system and method based on intelligent dosing

Abstract

The invention discloses a lime coagulation and clarification treatment system and method based on intelligent dosing, and belongs to the technical field of water treatment.The system comprises an efficient softening coagulation and clarification unit and an intelligent monitoring unit, a lime milk intelligent preparation unit, an intelligent dosing control unit and a sludge dewatering unit which are connected with the efficient softening coagulation and clarification unit. The efficient softening, coagulation and clarification unit is formed by sequentially connecting a wastewater regulating tank, a first-stage rapid mixing tank, a second-stage slow flocculation and concentration tank, a tubular membrane intelligent filtering device and a produced water neutralization tank; the intelligent monitoring unit collects incoming water and produced water data and transmits the data to the intelligent dosing control unit; the intelligent lime milk preparation unit is used for preparing and adding lime milk; the intelligent dosing control unit realizes intelligent dosing; and the sludge dewatering unit is used for treating the discharged sludge and returning the sewage. Intelligent monitoring, self-adaptive control, prediction algorithm and softening coagulation clarification are realized, the problems of inaccurate dosing, large water quality fluctuation and low automation degree of a traditional system are solved, and the system is suitable for scenes such as reclaimed water deep treatment and industrial wastewater treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and in particular relates to a lime coagulation and clarification treatment system and method based on intelligent dosing. Background Art

[0002] Advanced treatment and reuse of reclaimed water and industrial wastewater have become a growing trend in wastewater treatment. Lime coagulation and clarification technology is the mainstream technology for the treatment and reuse of high-hardness reclaimed water and industrial wastewater, offering advantages such as softening hardness, settling suspended solids, and clarifying water. Traditional lime coagulation and clarification technology relies primarily on manual experience to adjust dosage. This not only results in low dosage accuracy but also suffers from manual adjustment lag, easily leading to overdosing (wasting 15%-30% of the reagent) or underdosing (impairing treatment effectiveness). Furthermore, the quality of incoming reclaimed water and industrial wastewater fluctuates significantly, with key parameters such as pH and turbidity fluctuating significantly (e.g., pH fluctuates by ±0.5-1.0, turbidity fluctuates by ±10 NTU). This results in a low level of automation in existing treatment systems, as control systems rely solely on a single parameter and struggle to adapt to complex water quality fluctuations. Furthermore, traditional mechanical agitation can lead to uneven settling of lime particles, compromising reaction efficiency.

[0003] Chinese patent application publication number CN105967389A discloses a zero-emission pretreatment system and process for desulfurization wastewater sludge and salt separation. The system comprises a sequentially connected raw water tank, a primary reaction clarification system, a secondary reaction clarification system, a tertiary reaction clarification system, and a clear water tank. Each reaction clarification system includes a reaction tank and a clarifier. In this pretreatment process, desulfurization wastewater enters the raw water tank, where an aeration fan introduces compressed air. The desulfurization wastewater is then pumped to the primary reaction clarification system via a raw water pump. After three stages of softening and clarification, the desulfurization wastewater enters the clear water tank, where part of the clear water tank supplies the membrane treatment process system, while the other part supplies the dosing system. This invention utilizes a three-stage clarification process to produce impure sludge, industrial-grade magnesium hydroxide, and calcium carbonate, respectively. By classifying the precipitate, the amount of hazardous waste disposed of is reduced, lowering system operating costs, and providing added value to some of the precipitate, achieving comprehensive resource utilization and waste recycling, with significant environmental benefits. However, this patent application still leaves room for system design optimization. Further reducing operating costs and maintenance difficulties, and improving operational stability and sustainability remain challenges that need to be addressed. The Chinese patent application with publication number CN210915539U discloses a softening treatment system suitable for high-alkalinity, low-hardness wastewater. The system includes a primary treatment system, a secondary treatment system and a membrane filtration tank. The primary treatment system includes a first reaction sedimentation tank, a first dosing device, a first seed screening device, a first sludge return device and an online alkalinity measurement feedback device; the secondary treatment system includes a second reaction sedimentation tank, a second dosing device, a second seed screening device, a second sludge return device and an online pH value measurement feedback device. The system has high reagent utilization and reaction efficiency, which ensures the quality of the refluxed seed crystals, reduces reagent waste and thus reduces the cost of reagent use. However, this patent application still has the problem of insufficient sludge treatment efficiency, and how to further reduce environmental pollution is still a problem that needs to be solved.

[0004] Traditional lime coagulation and clarification treatment technology primarily relies on manual experience to adjust dosage. This not only results in low dosage accuracy but also suffers from manual adjustment lag, easily leading to overdosing or underdosing, resulting in wasted or unsatisfactory treatment results. Existing treatment systems have a low degree of automation, with control systems relying solely on a single parameter (such as pH), making them difficult to adapt to complex water quality variations and incapable of intelligent and precise water quality monitoring and control. Traditional mechanical agitation methods can easily lead to uneven lime particle settling, affecting reaction efficiency and preventing efficient wastewater recycling. Existing multi-parameter feedback control schemes suffer from poor model adaptability and predictive power, and sensors are susceptible to lime contamination, compromising the accuracy of water quality monitoring. Therefore, an intelligent, high-precision, and adaptive lime coagulation and clarification treatment system and method are urgently needed. By leveraging real-time water quality monitoring, intelligent dosage decision-making, precise dosing and mixing reactions, efficient filtration and clarification, sludge control, and data feedback and optimization, these systems address many of the challenges inherent in traditional technologies, enabling remote monitoring and automatic control, and improving treatment efficiency and water quality. Summary of the Invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a lime coagulation and clarification treatment system and method based on intelligent dosing, so as to solve the technical problems of inaccurate dosing, large water quality fluctuations, low degree of automation and insufficient sludge treatment efficiency in the existing lime coagulation and clarification treatment system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention discloses a lime coagulation and clarification treatment system based on intelligent dosing, comprising: High-efficiency softening, coagulation and clarification unit, intelligent monitoring unit, intelligent lime milk preparation unit, intelligent dosing control unit and sludge dewatering unit connected to the high-efficiency softening, coagulation and clarification unit respectively; High-efficiency softening, coagulation and clarification unit, including a wastewater regulating tank, a first-level rapid mixing tank, a second-level slow flocculation and concentration tank, a tubular membrane intelligent filtration device and a water production neutralization tank connected in sequence; Intelligent monitoring unit, used to collect incoming water data and produced water data in real time and transmit them to the intelligent dosing control unit; Lime milk intelligent preparation unit, used for preparing and adding lime milk; Intelligent dosing control unit, used for intelligent dosing to the high-efficiency softening, coagulation and clarification unit; The sludge dewatering unit is used to receive the sludge discharged from the secondary slow flocculation and thickening tank, perform sludge thickening and sludge dewatering, and return the obtained wastewater to the wastewater regulating tank for circulation.

[0007] Preferably, the incoming water data includes: alkalinity, hardness, pH value, turbidity, temperature and flow rate; the produced water data includes: alkalinity, hardness, pH value, turbidity, temperature and flow rate.

[0008] Preferably, the intelligent monitoring unit is connected to the wastewater regulating tank and the produced water neutralization tank; the lime milk intelligent preparation unit includes a lime storage device, a lime dissolving device and a lime metering and adding device which are connected in sequence.

[0009] Preferably, the intelligent dosing control unit includes an intelligent dosing device for bactericide, an intelligent dosing device for lime milk, an intelligent dosing device for alkali, and an intelligent dosing device for acid; The bactericide intelligent dosing device is connected to the wastewater regulating tank; the lime milk intelligent dosing device is connected to the first-level rapid mixing tank; the alkali intelligent dosing device is connected to the first-level rapid mixing tank; and the acid intelligent dosing device is connected to the produced water neutralization tank.

[0010] Preferably, the secondary slow flocculation and concentration tank comprises a first secondary slow flocculation and concentration tank and a second secondary slow flocculation and concentration tank connected in series; the first secondary slow flocculation and concentration tank is connected to the second secondary slow flocculation and concentration tank by overflow.

[0011] Further preferably, the sludge dewatering unit is connected to the bottom of the second secondary slow flocculation and concentration tank, and the supernatant after sludge dewatering is returned to the wastewater regulating tank.

[0012] Preferably, it also includes a remote monitoring module, which feeds back the system operation status to the monitoring center through wireless communication to achieve remote control and data analysis; when the system detects an abnormality, it automatically issues an alarm message and starts the emergency processing procedure.

[0013] The present invention also discloses a lime coagulation and clarification treatment method based on intelligent dosing, which uses the above-mentioned lime coagulation and clarification treatment system based on intelligent dosing to perform lime coagulation and clarification treatment, including the following steps: The intelligent monitoring unit collects incoming water data in real time and transmits it to the intelligent dosing control unit, which then intelligently doses the water to the high-efficiency softening, coagulation and clarification unit based on the incoming water data. The incoming water flows through the wastewater regulating tank, the first-level rapid mixing tank and the second-level slow flocculation and concentration tank in sequence, and is doped and homogenized in real time through the intelligent dosing control unit, and then transported to the tubular membrane intelligent filtration device. The tubular membrane intelligent filtration device separates the solid and liquid of the incoming water, and the produced water is transported to the produced water neutralization tank, monitored by the intelligent monitoring unit and regulated by the intelligent dosing control unit before being reused.

[0014] Preferably, after the tubular membrane intelligent filtration device filters the incoming water, part of the filtrate will be returned to the secondary slow flocculation concentration tank, and the large-flow wastewater will circulate between the secondary slow flocculation concentration tank and the tubular membrane intelligent filtration device, and the other part of the filtrate will enter the water production neutralization tank; the water production neutralization tank will be reused after adjusting the pH value through the acid intelligent dosing device.

[0015] Preferably, the intelligent monitoring unit is controlled in the following manner based on the alkalinity, hardness, pH value, turbidity, temperature and flow rate of the collected incoming water and the alkalinity, hardness, pH value, turbidity, temperature and flow rate of the produced water data: 1) Control the amount of lime milk added in the primary rapid mixing tank according to the pH value; 2) Control the circulation flow of the tubular membrane intelligent filtration device based on turbidity; 3) Adjust the acid dosage of the tubular membrane intelligent filtration device according to the alkalinity; 4) Adjust the residence time of wastewater in each tank according to temperature; 5) Adjust the dosing rate of each dosing device according to the flow rate, store and analyze the monitoring data through the intelligent monitoring unit, optimize the dosing strategy based on historical data, and realize the adaptive operation of the system.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a lime coagulation and clarification treatment system based on intelligent dosing. By constructing a complete "monitoring-dosing-coagulation and clarification-sludge treatment" system, the system achieves full automation of the water treatment process through the connection of efficient softening, coagulation and clarification units with intelligent monitoring, lime milk preparation, dosing control, and sludge dewatering units. This system overcomes the drawbacks of traditional process unit fragmentation, with data interoperability and coordinated actions between units. From incoming water homogenization to produced water reuse and closed-loop sludge treatment, a "one-stop" solution is formed, improving the integrity and consistency of the system. It is suitable for scenarios such as deep treatment of reclaimed water, industrial wastewater treatment, drinking water softening, chemical phosphorus removal, and sludge conditioning.

[0017] Furthermore, incoming / produced water data is clearly defined to encompass six core indicators: alkalinity, hardness, pH, turbidity, temperature, and flow rate. These cover water chemical properties (alkalinity, hardness), physical and chemical state (pH, turbidity), environmental parameters (temperature), and operational parameters (flow rate). This provides comprehensive data support for intelligent control, preventing dosing errors and water quality fluctuations caused by missing parameters and ensuring stable treatment results.

[0018] Furthermore, the intelligent monitoring unit is directly connected to the wastewater regulating tank and the produced water neutralization tank, enabling monitoring of the key nodes from "water inlet to water outlet" with zero data transmission delay. The lime milk preparation unit is broken down into three stages: "storage-dissolution-dosing," ensuring precise control of the lime milk from raw materials to dosing. This refinement of the unit connections strengthens the system's controllability from raw materials to produced water, addresses the issues of clogging and uneven concentration associated with traditional lime milk dosing, and improves chemical utilization efficiency.

[0019] Furthermore, the intelligent dosing control unit covers four types of chemicals: biocides, lime milk, alkalis, and acids, corresponding to "sterilization (wastewater conditioning tank), coagulation (primary mixing tank), and pH adjustment (primary mixing tank + neutralization tank)." This enables precise control of the dosing points of different functional chemicals, avoids chemical interference, improves the efficiency of coagulation, biocides, and pH adjustment, and solves the problems of chaotic dosing and inadequate reactions in traditional processes.

[0020] Furthermore, the two-stage slow flocculation and thickening tank utilizes a "series overflow" design to ensure optimal flocculation time and sedimentation efficiency, resolving the issues of insufficient flocculation and sludge floating found in traditional single-stage flocculation tanks. This tiered treatment improves floc formation efficiency and sludge thickening, reducing the burden on subsequent tubular membrane filtration, indirectly extending membrane module life and reducing operating costs.

[0021] Furthermore, the sludge dewatering unit is connected to the bottom of the second-stage flocculation tank, and the supernatant is returned to the regulating tank, creating a closed loop of "sludge treatment and supernatant reuse." This reduces sludge discharge pollution, lowers the incoming water load (the supernatant contains some treated water), improves water resource utilization, and solves the secondary pollution and water waste caused by improper sludge disposal in traditional processes.

[0022] Furthermore, a remote monitoring module has been added, enabling "operational status feedback, remote control, and data analysis" through wireless communication. It automatically generates alarms and initiates emergency procedures in the event of an anomaly. This breaks through the limitations of traditional systems' "on-site reliance" and adapts to unmanned and cross-regional management needs. Emergency procedures ensure rapid response and loss mitigation in the event of system failures, improving system reliability and operational efficiency.

[0023] This invention also discloses a lime coagulation and clarification treatment method based on intelligent dosing. It defines a standardized process of "monitoring-dosing-coagulation-filtration-recycling" and relies on the system to achieve full automation of the process, eliminating the need for human intervention. This method addresses the traditional process's reliance on manual experience and large operational errors, ensuring consistent treatment results and reducing labor costs and management difficulties.

[0024] Furthermore, tubular membrane filtration utilizes a "partial reflux + high-flow circulation" model, which not only ensures efficient solid-liquid separation but also enhances the flocculation reaction in the secondary flocculation tank (the circulating liquid carries the alum flocs back). This improves membrane filtration stability (the reflux flushes the membrane surface) and flocculation effectiveness (the circulation promotes the growth of alum flocs), addressing the clogging and inadequate flocculation problems of traditional membrane filtration and shortening the treatment cycle.

[0025] Furthermore, a multi-parameter linkage control system was established: "pH-lime milk dosage," "turbidity-membrane circulation flow," "alkalinity-acid dosage," "temperature-residence time," and "flow-dosing rate." This optimization strategy was combined with historical data to achieve "adaptive operation" of the system, dynamically responding to fluctuations in water quality and quantity. This addressed the poor adaptability of traditional single-parameter control (such as pH alone) and ensured stable treatment results even under complex water conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a process flow chart of the lime coagulation and clarification treatment method based on intelligent dosing disclosed in the present invention. DETAILED DESCRIPTION

[0027] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] 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 the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0030] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] The invention discloses a lime coagulation and clarification treatment system based on intelligent dosing, which consists of an intelligent monitoring unit, an intelligent dosing control unit, an intelligent lime milk preparation system, an efficient softening coagulation and clarification system, and a sludge dewatering system.

[0034] The intelligent detection unit collects the alkalinity, hardness, pH, turbidity, temperature and flow of the incoming water; the system collects the alkalinity, hardness, pH, turbidity, temperature, flow of the produced water and the data is summarized and processed by the system.

[0035] The intelligent dosing control unit includes an intelligent lime milk dosing device, an acid and alkali intelligent dosing device, a fungicide intelligent dosing device and an intelligent control system.

[0036] The intelligent lime milk preparation unit mainly consists of a lime storage device, a lime dissolving device, a lime metering and dosing device and an intelligent control system.

[0037] The high-efficiency softening coagulation and clarification unit mainly includes a wastewater regulating tank, a first-level rapid mixing tank, a second-level slow flocculation and concentration tank, a tubular membrane intelligent filtration device and a water production neutralization unit.

[0038] The tubular membrane intelligent filtration device adopts a multi-channel design, automatically adjusts the circulation flow through the inlet and outlet pressure difference control system, and is equipped with a turbidity sensor to monitor the filtration effect in real time; the secondary slow flocculation and thickening tank is equipped with a sludge concentration sensor to monitor the sludge concentration and control the sludge discharge cycle; the intelligent control system adopts a fuzzy control algorithm to adaptively adjust the dosing parameters according to real-time monitoring data.

[0039] The produced water neutralization unit is mainly composed of a produced water neutralization regulating tank, an acid dosing device, etc.

[0040] The sludge dewatering unit mainly consists of a sludge thickening tank, a sludge dewatering machine, and a dewatering machine cleaning machine.

[0041] The lime coagulation and clarification treatment system based on intelligent dosing disclosed in the present invention mainly includes a wastewater regulating tank, a sodium hypochlorite intelligent dosing device, an alkalinity meter, a hardness meter, a pH meter, a conductivity meter, an ORP meter, a turbidity meter, a thermometer, a flow meter and a chloride ion meter; a first-level rapid coagulation tank, a lime milk intelligent configuration and dosing device, and a sodium hydroxide intelligent dosing device; a second-level slow flocculation and concentration tank, a sludge dewatering machine, a tubular membrane intelligent filtration device, a water production neutralization tank, a sulfuric acid dosing device, an intelligent dosing control system, etc. After the incoming water enters the wastewater regulating tank, alkalinity meter, hardness meter, pH meter, turbidity meter, thermometer, flow meter, chloride ion meter and other instruments collect water samples to analyze water quality indicators. The intelligent control system automatically matches the dosing parameters according to the collected data, controls the lime milk configuration system, acid and alkali dosing device, sodium hypochlorite dosing device to adjust the concentration of the agent, metering pump parameters, etc. After the wastewater enters the first-level rapid coagulation tank, the intelligent control system controls its residence time and mixer speed according to the water quality, and completes the complete reaction of the lime milk in the second stage to the greatest extent. After entering the second-level slow flocculation and concentration tank, the wastewater is concentrated. Water flows slowly within the tanks, overflowing from the first and second slow flocculation and concentrating tanks into the second, and then into the tubular membrane intelligent filtration system. The system controls the circulation flow by monitoring the turbidity of its product water and the pressure differential between the inlet and outlet of the system. The product water from the tubular membrane intelligent filtration system enters the water neutralization tank, where it is monitored for softening effectiveness by a meter. This data is collected and transmitted to the intelligent control system for calibration of the system's dosing level during the softening phase. Simultaneously, sulfuric acid is added to the water neutralization tank via an acid dosing system to adjust the pH of the product water to meet reuse requirements. The sludge dewatering system monitors the sludge concentration at the bottom of the second and second slow flocculation and concentrating tanks to dewater the sludge in a timely manner. The dewatered sludge cake is transported for external processing, and the supernatant is returned to the wastewater equalization tank for further treatment. The entire system continuously monitors incoming water quality, matches the softening and dosing settings, and monitors the softening effectiveness of the dosing, accumulating data and enabling adaptive dosing. The intelligent control system learns the adaptive dosing algorithm and uses historical data to predict dosing amounts, automatically generating dosing reports. It also monitors influent and effluent water quality in real time, adjusts control parameters, and uploads test data to form a closed-loop optimization loop, enabling remote monitoring and automatic control. The method of the present invention can implement "intelligent monitoring + adaptive control + predictive algorithm + softening coagulation and clarification," resolving issues such as inaccurate dosing, large fluctuations in water quality, and low automation in traditional lime coagulation treatment systems, with significant economic and environmental benefits. It is suitable for scenarios such as deep reclaimed water treatment, industrial wastewater treatment, drinking water softening, chemical phosphorus removal, and sludge conditioning.

[0042] See also Figure 1 The figure is a process flow chart of the lime coagulation and clarification treatment method based on intelligent dosing disclosed in the present invention; as can be seen from the figure, based on the above-mentioned intelligent dosing lime coagulation and clarification treatment system, the wastewater treatment process mainly includes the following steps: 1) The present invention controls the incoming water to homogenize and equalize the wastewater in the wastewater regulating tank, and simultaneously adds sodium hypochlorite to sterilize and kill algae, thereby preventing the growth of microorganisms; 2) The wastewater is then controlled to enter the primary rapid mixing tank, where lime and sodium hydroxide are added for stirring and coagulation reaction; 3) Then it goes to the secondary slow flocculation and concentration tank for further flocculation and concentration. The high-liquid-level wastewater in the secondary slow flocculation and concentration tank is transported to the tubular membrane intelligent filtration device. The tubular membrane intelligent filtration device performs solid-liquid separation on the incoming water, removing suspended solids, colloids, calcium and magnesium precipitates, some organic matter, and silicon in the water. At the same time, the high-flow wastewater circulates between the secondary slow flocculation and concentration tank and the tubular membrane intelligent filtration device. The water produced by the tubular membrane intelligent filtration device is transported to the water neutralization unit. 4) The water neutralization unit uses an intelligent acid dosing device to control the pH of the produced water to meet the reuse requirements before reuse. Concentrated sludge is regularly discharged from the secondary slow flocculation and thickening tank into the sludge storage tank and sent to the sludge dewatering unit for further treatment.

[0043] The present invention can conveniently realize the automatic treatment of sewage and wastewater by lime coagulation and clarification without human intervention.

[0044] Compared with the prior art, the present invention has the following advantages: (1) Real-time water quality monitoring: collect pH, turbidity, flow rate and other data online and transmit them to the control unit.

[0045] (2) Intelligent decision-making on dosage: A control algorithm is used to dynamically adjust the dosage of lime milk and coagulant. Combined with the system database prediction model, the dosing strategy can be adjusted in advance to cope with fluctuations in water quality and water quantity.

[0046] (3) Precise dosing and mixing reaction: Lime milk and coagulant are added in an optimized ratio, and alum flocs are formed through multi-stage mixing reactions.

[0047] (4) High-efficiency filtration, clarification and sludge control: The mixed liquid enters the tubular membrane intelligent filtration device, undergoes high-flow circulation filtration, and the sludge in the secondary slow flocculation and concentration tank is automatically discharged; the pH of the filtered and clarified water is intelligently controlled, and the produced water is quickly reused.

[0048] (5) Data feedback and optimization: Real-time monitoring of effluent water quality, adjustment of control parameters, and closed-loop optimization.

[0049] Example 1 A lime coagulation and clarification treatment system based on intelligent dosing, comprising: High-efficiency softening, coagulation and clarification unit, intelligent monitoring unit, intelligent lime milk preparation unit, intelligent dosing control unit and sludge dewatering unit connected to the high-efficiency softening, coagulation and clarification unit respectively; High-efficiency softening, coagulation and clarification unit, including a wastewater regulating tank, a first-level rapid mixing tank, a second-level slow flocculation and concentration tank, a tubular membrane intelligent filtration device and a water production neutralization tank connected in sequence; Intelligent monitoring unit, used to collect incoming water data and produced water data in real time and transmit them to the intelligent dosing control unit; Lime milk intelligent preparation unit, used for preparing and adding lime milk; Intelligent dosing control unit, used for intelligent dosing to the high-efficiency softening, coagulation and clarification unit; The sludge dewatering unit is used to receive the sludge discharged from the secondary slow flocculation and thickening tank, perform sludge thickening and sludge dewatering, and return the obtained wastewater to the wastewater regulating tank for circulation.

[0050] The lime coagulation and clarification treatment method based on intelligent dosing, and the lime coagulation and clarification treatment system based on the intelligent dosing, comprises the following steps: The intelligent monitoring unit collects incoming water data in real time and transmits it to the intelligent dosing control unit, which then intelligently doses the water to the high-efficiency softening, coagulation and clarification unit based on the incoming water data. The incoming water flows through the wastewater regulating tank, the first-level rapid mixing tank and the second-level slow flocculation and concentration tank in sequence, and is doped and homogenized in real time through the intelligent dosing control unit, and then transported to the tubular membrane intelligent filtration device. The tubular membrane intelligent filtration device separates the solid and liquid of the incoming water, and the produced water is transported to the produced water neutralization tank, monitored by the intelligent monitoring unit and regulated by the intelligent dosing control unit before being reused.

[0051] Example 2 A lime coagulation and clarification treatment system based on intelligent dosing, comprising: High-efficiency softening, coagulation and clarification unit, intelligent monitoring unit, intelligent lime milk preparation unit, intelligent dosing control unit and sludge dewatering unit connected to the high-efficiency softening, coagulation and clarification unit respectively; The high-efficiency softening, coagulation, and clarification unit includes a sequentially connected wastewater regulating tank, a primary rapid mixing tank, a secondary slow flocculation and thickening tank, a tubular membrane intelligent filtration device, and a produced water neutralization tank. The secondary slow flocculation and thickening tank includes a first and second slow flocculation and thickening tank connected in series, which is connected to the second slow flocculation and thickening tank via overflow. The sludge dewatering unit is connected to the bottom of the second slow flocculation and thickening tank, and the supernatant after sludge dewatering is returned to the wastewater regulating tank.

[0052] The intelligent monitoring unit collects real-time incoming and outgoing water data and transmits it to the intelligent dosing control unit. Incoming water data includes alkalinity, hardness, pH, turbidity, temperature, and flow rate; outgoing water data includes alkalinity, hardness, pH, turbidity, temperature, and flow rate. The intelligent monitoring unit is connected to the wastewater regulating tank and the outgoing water neutralization tank. The intelligent lime milk preparation unit includes a lime storage device, a lime dissolving device, and a lime metering device, all connected in sequence.

[0053] Lime milk intelligent preparation unit, used for preparing and adding lime milk; The intelligent dosing control unit is used to perform intelligent dosing in the high-efficiency softening coagulation and clarification unit; the intelligent dosing control unit includes a bactericide intelligent dosing device, a lime milk intelligent dosing device, an alkali intelligent dosing device and an acid intelligent dosing device; the bactericide intelligent dosing device is connected to the wastewater regulating tank; the lime milk intelligent dosing device is connected to the first-level rapid mixing tank; the alkali intelligent dosing device is connected to the first-level rapid mixing tank; and the acid intelligent dosing device is connected to the produced water neutralization tank.

[0054] The sludge dewatering unit is used to receive the sludge discharged from the secondary slow flocculation and thickening tank, perform sludge thickening and sludge dewatering, and return the obtained wastewater to the wastewater regulating tank for circulation.

[0055] It also includes a remote monitoring module, which feeds back the system operation status to the monitoring center through wireless communication, realizing remote control and data analysis; when the system detects an abnormality, it automatically issues an alarm message and initiates the emergency handling procedure.

[0056] The lime coagulation and clarification treatment method based on intelligent dosing, and the lime coagulation and clarification treatment system based on the intelligent dosing, comprises the following steps: The intelligent monitoring unit collects incoming water data in real time and transmits it to the intelligent dosing control unit, which then intelligently doses the water to the high-efficiency softening, coagulation and clarification unit based on the incoming water data. The incoming water flows sequentially through the wastewater regulating tank, the first-stage rapid mixing tank, and the second-stage slow flocculation and concentrating tank. After real-time dosing and homogenization by the intelligent dosing control unit, it is then transported to the tubular membrane intelligent filtration device. The tubular membrane intelligent filtration device separates the incoming water into solids and liquids, and the produced water is transported to the produced water neutralization tank. After being monitored by the intelligent monitoring unit and regulated by the intelligent dosing control unit, it is reused. After filtering the incoming water, the tubular membrane intelligent filtration device returns part of the filtrate to the second-stage slow flocculation and concentrating tank. The high-flow wastewater circulates between the second-stage slow flocculation and concentrating tank and the tubular membrane intelligent filtration device, while the remaining filtrate enters the produced water neutralization tank. The produced water neutralization tank has its pH adjusted by the acid intelligent dosing device before being reused.

[0057] The intelligent monitoring unit is controlled in the following ways based on the alkalinity, hardness, pH value, turbidity, temperature and flow of the collected incoming water and the alkalinity, hardness, pH value, turbidity, temperature and flow of the produced water data: 1) Control the amount of lime milk added in the primary rapid mixing tank according to the pH value; 2) Control the circulation flow of the tubular membrane intelligent filtration device based on turbidity; 3) Adjust the acid dosage of the tubular membrane intelligent filtration device according to the alkalinity; 4) Adjust the residence time of wastewater in each tank according to temperature; 5) Adjust the dosing rate of each dosing device according to the flow rate, store and analyze the monitoring data through the intelligent monitoring unit, optimize the dosing strategy based on historical data, and realize the adaptive operation of the system.

[0058] Example 3 A lime coagulation and clarification treatment system based on intelligent dosing includes: an intelligent monitoring unit, an intelligent dosing control unit, an intelligent lime milk preparation unit, an efficient softening coagulation and clarification unit, and a sludge dehydration unit.

[0059] The intelligent monitoring unit includes a water alkalinity meter, hardness meter, pH meter, turbidity meter, thermometer, flow meter, and data acquisition and processing unit. The turbidity meter uses a scattered optical turbidity meter, and the flow meter uses an electromagnetic flow meter.

[0060] The intelligent dosing control unit includes an intelligent lime milk dosing device, an intelligent acid and alkali dosing device, an intelligent fungicide dosing device, and an intelligent control system. The intelligent lime milk dosing device uses a centrifugal pump; the intelligent acid and alkali dosing device uses a corrosion-resistant pump; and the intelligent fungicide dosing device uses a high-pressure nozzle.

[0061] The intelligent lime milk preparation unit includes a lime storage device, a lime dissolving device, a lime metering and dosing device, and an intelligent control system. The lime storage device is vertical and cylindrical; the lime dissolving device is a stirring device; and the lime metering and dosing device uses an electronic scale.

[0062] The high-efficiency softening, coagulation, and clarification unit includes a wastewater regulating tank, a first-stage rapid mixing tank, a second-stage slow flocculation and concentrating tank, a tubular membrane intelligent filtration device, and a produced water neutralization tank. The wastewater regulating tank is vertical and cylindrical; the first-stage rapid mixing tank is horizontal; the second-stage slow flocculation and concentrating tank is vertical; the tubular membrane intelligent filtration device adopts a multi-channel design; and the produced water neutralization tank is vertical and cylindrical.

[0063] The tubular membrane intelligent filtration system utilizes a multi-channel design, automatically adjusting the circulation flow rate through an inlet and outlet pressure differential control system. A turbidity sensor is also installed to monitor filtration efficiency in real time. A sludge concentration sensor is installed in the secondary slow flocculation and thickening tank to monitor sludge concentration and control the sludge discharge cycle. The intelligent control system utilizes a fuzzy control algorithm to adaptively adjust dosing parameters based on real-time monitoring data.

[0064] The working process of the lime coagulation and clarification treatment method based on intelligent dosing is as follows: after the wastewater is homogenized in the wastewater regulating tank, it enters the first-level rapid mixing tank through a pipeline, where it is fully mixed with lime and sodium hydroxide; the mixed liquid enters the second-level slow flocculation and concentration tank for further treatment, wherein an overflow device is set at the bottom of the second-level slow flocculation and concentration tank to transport part of the wastewater to the tubular membrane intelligent filtration device; after the tubular membrane intelligent filtration device removes suspended matter, colloids, etc., part of the filtrate is returned to the second-level slow flocculation and concentration tank, and the other part enters the water production neutralization system; the water production neutralization unit is reused after adjusting the pH value through the acid intelligent dosing device.

[0065] Based on real-time monitoring data, the intelligent control system implements the following control methods: 1) lime milk dosage based on pH; 2) filtration flow rate based on turbidity; 3) acid dosage based on alkalinity; 4) wastewater residence time in each tank based on temperature; and 5) dosing rate of each dosing device based on flow rate. The system stores and analyzes monitoring data through a data acquisition and processing system, optimizing dosing strategies based on historical data and achieving adaptive system operation.

[0066] In summary, the lime coagulation and clarification treatment system and method based on intelligent dosing disclosed by the present invention realizes real-time monitoring of incoming water quality by setting an intelligent monitoring unit, including online collection and analysis of parameters such as pH, turbidity, and flow rate, overcomes the lag problem of manual experience in adjusting the dosage of dosing in traditional technologies, significantly improves the dosing accuracy, avoids the problem of over-dosing or insufficient dosage, and realizes efficient use of drugs; adopts an intelligent dosing control unit and a lime milk intelligent preparation unit to realize accurate dosing and mixing reaction of lime milk and coagulant, dynamically adjusts the dosage through a control algorithm, and adjusts the dosing strategy in advance in combination with a system database prediction model, effectively responds to fluctuations in water quality and water volume, and improves the degree of automation of the treatment system; the efficient softening coagulation and clarification of the present invention The unit adopts a multi-stage treatment process, including a wastewater regulating tank, a first-level rapid mixing tank, a second-level slow flocculation and concentration tank, etc. Through multi-stage reaction and filtration, efficient treatment and purification of wastewater is achieved, and the treatment efficiency is effectively improved; the tubular membrane intelligent filtration device of the present invention realizes efficient recycling of wastewater and large-flow circulation filtration by monitoring parameters such as the turbidity of the produced water and the pressure difference between the inlet and outlet of the device, thereby significantly reducing water resource consumption; the water production neutralization unit of the present invention adjusts the pH of the produced water through an intelligent acid dosing device to ensure that the quality of the produced water meets the reuse requirements, thereby realizing efficient recycling of water resources; the present invention performs data feedback and optimization through an intelligent control system, realizes adaptive adjustment of system parameters, improves the operating stability and reliability of the system, and forms a closed-loop optimization operation mode.

[0067] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0068] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. A lime coagulation and clarification treatment system based on intelligent dosing, characterized in that: include: High-efficiency softening, coagulation and clarification unit, intelligent monitoring unit, intelligent lime milk preparation unit, intelligent dosing control unit and sludge dewatering unit connected to the high-efficiency softening, coagulation and clarification unit respectively; The high-efficiency softening coagulation and clarification unit includes a wastewater regulating tank, a first-level rapid mixing tank, a second-level slow flocculation and concentration tank, a tubular membrane intelligent filtration device and a water production neutralization tank connected in sequence; The intelligent monitoring unit is used to collect incoming water data and produced water data in real time and transmit them to the intelligent dosing control unit; The intelligent lime milk preparation unit is used to prepare and add lime milk; The intelligent dosing control unit is used to perform intelligent dosing into the high-efficiency softening, coagulation and clarification unit; The sludge dewatering unit is used to receive the sludge discharged from the secondary slow flocculation concentration tank, perform sludge concentration and sludge dewatering, and return the obtained wastewater to the wastewater regulating tank for circulation.

2. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 1 is characterized in that: The incoming water data includes: alkalinity, hardness, pH value, turbidity, temperature and flow rate; the produced water data includes: alkalinity, hardness, pH value, turbidity, temperature and flow rate.

3. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 1 is characterized in that: The intelligent monitoring unit is connected to the wastewater regulating tank and the produced water neutralization tank; the lime milk intelligent preparation unit includes a lime storage device, a lime dissolving device and a lime metering and adding device which are connected in sequence.

4. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 1 is characterized in that: The intelligent dosing control unit includes an intelligent dosing device for bactericide, an intelligent dosing device for lime milk, an intelligent dosing device for alkali and an intelligent dosing device for acid; The bactericide intelligent dosing device is connected to the wastewater regulating tank; the lime milk intelligent dosing device is connected to the first-level rapid mixing tank; the alkali intelligent dosing device is connected to the first-level rapid mixing tank; and the acid intelligent dosing device is connected to the produced water neutralization tank.

5. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 1 is characterized in that: The secondary slow flocculation and concentration tank comprises a first secondary slow flocculation and concentration tank and a second secondary slow flocculation and concentration tank connected in series; the first secondary slow flocculation and concentration tank is connected to the second secondary slow flocculation and concentration tank by overflow.

6. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 5 is characterized in that: The sludge dewatering unit is connected to the bottom of the second secondary slow flocculation and concentration tank, and the supernatant after sludge dewatering flows back to the wastewater regulating tank.

7. The lime coagulation and clarification treatment system based on intelligent dosing according to claim 1 is characterized in that: It also includes a remote monitoring module, which feeds back the system operation status to the monitoring center through wireless communication, realizing remote control and data analysis; when the system detects an abnormality, it automatically issues an alarm message and initiates the emergency handling procedure.

8. A lime coagulation and clarification treatment method based on intelligent dosing, characterized in that: The lime coagulation and clarification treatment system based on intelligent dosing according to any one of claims 1 to 7 is used to carry out lime coagulation and clarification treatment, comprising the following steps: The intelligent monitoring unit collects incoming water data in real time and transmits it to the intelligent dosing control unit, which then intelligently doses the water to the high-efficiency softening, coagulation and clarification unit based on the incoming water data. The incoming water flows through the wastewater regulating tank, the first-level rapid mixing tank and the second-level slow flocculation and concentration tank in sequence, and is doped and homogenized in real time through the intelligent dosing control unit, and then transported to the tubular membrane intelligent filtration device. The tubular membrane intelligent filtration device separates the solid and liquid of the incoming water, and the produced water is transported to the produced water neutralization tank, monitored by the intelligent monitoring unit and regulated by the intelligent dosing control unit before being reused.

9. The lime coagulation and clarification treatment method based on intelligent dosing according to claim 8, characterized in that: After the tubular membrane intelligent filtration device filters the incoming water, part of the filtrate is returned to the secondary slow flocculation concentration tank. The large-flow wastewater circulates between the secondary slow flocculation concentration tank and the tubular membrane intelligent filtration device, and the other part of the filtrate enters the water production neutralization tank; The produced water is reused after the pH value is adjusted in the neutralization tank through the acid intelligent dosing device.

10. The lime coagulation and clarification treatment method based on intelligent dosing according to claim 8, characterized in that: The intelligent monitoring unit is controlled in the following ways based on the alkalinity, hardness, pH value, turbidity, temperature and flow of the collected incoming water and the alkalinity, hardness, pH value, turbidity, temperature and flow of the produced water data: 1) Control the amount of lime milk added in the primary rapid mixing tank according to the pH value; 2) Control the circulation flow of the tubular membrane intelligent filtration device based on turbidity; 3) Adjust the acid dosage of the tubular membrane intelligent filtration device according to the alkalinity; 4) Adjust the residence time of wastewater in each tank according to temperature; 5) Adjust the dosing rate of each dosing device according to the flow rate, store and analyze the monitoring data through the intelligent monitoring unit, optimize the dosing strategy based on historical data, and realize the adaptive operation of the system.

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