Monitoring adjustment and chemical automatic debugging system for wastewater pretreatment

Abstract

The invention provides a monitoring adjustment and chemical automatic debugging system for wastewater pretreatment. The monitoring adjustment and chemical automatic debugging system comprises a pretreatment module, a monitoring module, a chemical preliminary determination module and an adjustment module. Compared with the prior art, the system has the advantages that wastewater parameters are monitored in real time through the monitoring module, the initial reagent determination module evaluates the feeding amount of initial reagents of wastewater, and the regulation module dynamically optimizes a reagent feeding scheme in combination with monitoring data and a predetermined water outlet target. The modules realize linkage control of equipment through a PLC (Programmable Logic Controller), so that the accuracy and the stability of a wastewater treatment process are ensured. The system realizes automation and optimization of medicament feeding, effectively improves the treatment efficiency, reduces medicament waste and operation cost, enhances the adaptability of the wastewater treatment system to water quality fluctuation, and has high environmental protection property and economical efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater pretreatment, and in particular to a monitoring and regulating system and an automated reagent debugging system for wastewater pretreatment. Background Art

[0002] The wastewater pretreatment stage is an indispensable and important link in the wastewater treatment process. Its main purpose is to remove most of the pollutants such as emulsified oil, suspended matter and colloids, thereby reducing the load of subsequent treatment units and ensuring the overall treatment effect. However, the monitoring of traditional wastewater treatment systems mostly relies on a single instrument to monitor a single parameter, and it is impossible to achieve real-time monitoring and linkage optimization of multiple parameters, resulting in low efficiency of system regulation. The amount of reagents added in the existing system is often based on manual experience, lacking dynamic adjustment methods, which can easily lead to waste of reagents or poor treatment effects. The operating parameters between the units lack an effective linkage mechanism, making it difficult to cope with rapid changes in influent water quality or water volume.

[0003] This experimental team has been browsing and studying a large amount of relevant records and materials on the relevant technologies of wastewater treatment for a long time. At the same time, relying on relevant resources and conducting a large number of relevant experiments, after a large number of searches, it was found that the existing prior arts such as CN115448479B, CN101693571B, CN108467089B, and CN103601323B disclosed in the prior art, such as a pretreatment system for difficult-to-degrade industrial wastewater disclosed in the prior art, including a water distribution tank tubular static mixer, a primary sedimentation tank, a micro-electrolysis tower, a coagulation tank, a secondary sedimentation tank and an automatic dosing device connected in sequence by pipelines, the micro-electrolysis tower is provided with an aerator at the bottom inlet, a packing device is provided inside the micro-electrolysis tower, and a backwash water distributor is provided at the top of the inner part. The present invention also discloses a process method of a pretreatment system. After the pH of the wastewater is adjusted, a PAC solution and a PAM solution are added to a tubular static mixer for coagulation. After anoxic micro-electrolysis reduction reaction and aerobic micro-electrolysis oxidation reaction are first performed in different micro-electrolysis towers, a Fenton reaction is performed with a reagent in a coagulation tank, and the wastewater enters a subsequent unit after flocculation and precipitation.

[0004] The present invention is made to solve the common problems in the field, such as backward monitoring means, low data utilization rate, inaccurate control of agent dosage, low sludge and waste oil separation efficiency, etc. Summary of the invention

[0005] The purpose of the present invention is to provide a monitoring and adjustment system and an automated reagent debugging system for wastewater pretreatment in order to solve the problems existing in the prior art, such as backward monitoring means, inaccurate reagent dosage, lack of linkage control and low sludge waste oil separation efficiency.

[0006] In order to overcome the shortcomings of the prior art, the present invention adopts the following technical solutions: A monitoring, regulating and automated reagent debugging system for wastewater pretreatment, the monitoring, regulating and automated reagent debugging system comprising a pretreatment module for pretreatment of wastewater, a monitoring module for monitoring relevant parameters of wastewater during the pretreatment process, a preliminary reagent determination module for evaluating and determining the initial reagent dosage of wastewater, and an adjustment module for dynamically generating an optimized reagent re-dosing adjustment plan based on the current treatment effect of the wastewater and a predetermined effluent target.

[0007] Furthermore, the pretreatment module includes a regulating tank, a demulsification sedimentation tank and a dissolved air flotation tank, and the wastewater is pretreated by passing through the regulating tank, the demulsification sedimentation tank and the dissolved air flotation tank in sequence. The wastewater treated in the equalization tank is called the first wastewater. The equalization tank is equipped with a first mixer for mixing the wastewater and a lifting pump for transferring the first wastewater to the demulsification sedimentation tank. The main function of the equalization tank is to collect and homogenize the wastewater volume and water quality, and provide stable water inlet conditions for the demulsification sedimentation tank and the dissolved air flotation tank.

[0008] Furthermore, the demulsification sedimentation tank is also provided with a first dosing pump for adding ferrous sulfate solution to the demulsification sedimentation tank, a second dosing pump for adding NaOH solution to the demulsification sedimentation tank, a liquid transfer pump for transferring the second wastewater from the demulsification sedimentation tank to the dissolved air flotation tank, a second mixer for promoting full mixing of the first wastewater with the NaOH solution and the ferrous sulfate solution, a discharge pipe connected to the bottom of the demulsification sedimentation tank, an electric control valve for controlling the closing condition of the discharge pipe, and a sludge discharge pump for driving the sludge and solid sediment to be discharged to the sludge tank through the discharge pipe. The treatment goal of the demulsification sedimentation tank is to remove the emulsified oil, colloids and large suspended particles in the first wastewater. By adjusting the pH of the first wastewater and adding ferrous sulfate solution, the first wastewater is fully mixed with the ferrous sulfate solution, and the emulsified oil, colloids and suspended particles react with the ferrous sulfate solution to form larger floc particles. The floc particles gradually settle to the bottom of the tank due to the increase in density to form sludge and solid sediments. After the treatment is completed, the clear liquid on the upper layer of the demulsification sedimentation tank is the second wastewater, and the bottom sediments are sludge and solid sediments. The second wastewater flows out of the demulsification sedimentation tank and enters the dissolved air flotation tank. The sludge and solid sediments are discharged from the demulsification sedimentation tank through a pipeline.

[0009] Furthermore, the dissolved air flotation tank is also provided with a third mixer, a scraper for removing scum floating on the surface of the dissolved air flotation tank, a jet dissolved air flotation machine, a third dosing pump for adding PAM solution polyacrylamide to the demulsification sedimentation tank, a fourth dosing pump for adding PAC solution polyaluminium chloride to the demulsification sedimentation tank, a drain pipe connected to the bottom of the dissolved air flotation tank, and a valve for controlling the connection between the drain pipe and the bottom of the dissolved air flotation tank. In the dissolved air flotation tank, after adding PAC solution and PAM solution, the fine suspended matter, emulsified oil particles and colloids in the second wastewater are neutralized and condensed to form primary flocs under the action of PAC solution, and the PAM solution further enhances the strength and stability of the flocs through adsorption bridging. A large number of fine bubbles are released into the dissolved air flotation tank through the jet dissolved air flotation machine. The flocs are attached to the fine bubbles and their specific gravity becomes smaller, gradually floating to the water surface to form scum. After the scum is removed by the scraper, the dissolved air flotation tank is the third wastewater that has been treated with flotation purification.

[0010] Furthermore, the monitoring module includes a first liquid level sensor for monitoring the liquid level of the wastewater in the regulating tank, a first COD monitor for checking the chemical oxygen demand of the first wastewater in the demulsification sedimentation tank, a first conductivity meter for monitoring the ammonia nitrogen concentration of the first wastewater in the demulsification sedimentation tank, a first pH monitor for monitoring the acidity and alkalinity in the demulsification sedimentation tank, a turbidity meter for monitoring the turbidity in the emulsion sedimentation tank, a suspended matter monitor for monitoring the suspended matter concentration in the area 0.1m to 0.15m below the liquid surface of the dissolved air flotation tank, and a second COD monitor for checking the chemical oxygen demand of the second wastewater in the dissolved air flotation tank.

[0011] Furthermore, the preliminary determination module for medicines receives the monitoring data transmitted by the PLC and further calculates and processes the detection data. The preliminary determination module for medicines implements the following operation steps: S101: Calculate the stirring speed Nr of the first stirrer: , Nr is the operating speed of the first rotor and the unit is rpm, Nb is the preset basic speed of the first rotor and the unit is rpm, H is the current liquid level in the regulating tank monitored by the first liquid level sensor and the unit is meter, Ht is the reference liquid level in the regulating tank and the unit is meter, k h is the liquid level adjustment coefficient, k d is the adjustment coefficient of the liquid level change rate, is the rate of change of the liquid level of the wastewater in the regulating tank in the last 10 minutes, and the unit is meter per second. Es is the stirring efficiency coefficient obtained by experimental measurement, which is used to indicate the effect of the agitator on the mixing uniformity in the regulating tank. YR is the reference index, and VR ranges from 0.7 to 0.9. S102: Calculate the transmission rate vp of the lift pump to transport the first wastewater in the regulating tank to the demulsification sedimentation tank: , vb is the preset lift pump base transmission rate, k v k is the adjustment coefficient of the liquid level change rate to the pump transmission rate, nis the adjustment coefficient of the agitator speed to the booster pump transmission rate; S103: Calculate the initial amount of NaOH solution INP in the demulsification sedimentation tank NaOH , , Wherein, V1 is the total volume of the first wastewater entering the demulsification sedimentation tank, and the unit is cubic meter, pH 实际 The current pH value of the liquid in the demulsification sedimentation tank monitored by the first pH monitor, pH 目标 ∈[7.0, 9.0], Kp is the acid neutralization capacity coefficient of the wastewater, and the unit of Kp is kg / m2, C NaOH is the concentration of NaOH solution, and the unit is kg / L; S104: Send a command to the first dosing pump to add INP NaOH After the NaOH solution of the capacity enters the demulsification sedimentation tank, the NaOH solution is slowly added to the demulsification sedimentation tank at a preset flow rate Vre through the continuous monitoring of the first pH monitor until the pH reaches 实际 ∈[7.0-9.0] ; S105: Calculate the initial amount of ferrous sulfate solution INP in the demulsification sedimentation tank 硫酸亚铁 : , Kf is the dosage coefficient of ferrous sulfate solution, C1 COD入池 is the initial chemical oxygen demand concentration of the first wastewater entering the demulsification sedimentation tank monitored by the first COD monitor. In the demulsification sedimentation tank, emulsified oil, colloids and suspended solids are the main sources of chemical oxygen demand concentration. By removing the emulsified oil, colloids and large suspended solids in the first wastewater in the demulsification sedimentation tank, the chemical oxygen demand concentration in the first wastewater will be reduced. C FeSO4 is the concentration of ferrous sulfate solution; S106: Calculate the initial amount of PAC solution INP in the dissolved air flotation tank PAC : , V2 is the total volume of the second wastewater entering the dissolved air flotation tank and the unit is square meters, Kpc is the PAC solution injection coefficient, SS 入池 is the suspended solids concentration of the second wastewater entering the demulsification sedimentation tank monitored by the suspended solids monitor, C PAC is the concentration of PAC solution; S107: Calculate the amount of PAM solution INP in the dissolved air flotation tank PAM , , where Kpm is the PAC solution dosage coefficient.

[0012] The beneficial effects achieved by the present invention are: 1. Intelligent monitoring and precise adjustment: Real-time monitoring of the pH value, chemical oxygen demand, suspended solids concentration, ammonia nitrogen concentration, turbidity, and liquid level of wastewater is achieved during wastewater pretreatment. The amount of chemical treatment agent is intelligently adjusted through a dynamic optimization algorithm to ensure the stability and accuracy of the wastewater treatment effect.

[0013] 2. Improve treatment efficiency and reduce costs: Through the coordinated work of the pretreatment module, monitoring module and adjustment module, the operating parameters of each treatment unit are optimized, the waste of reagents is reduced, the removal efficiency of emulsified oil and suspended solids is improved, and the operating cost of wastewater treatment is reduced.

[0014] 3. Enhance system adaptability and sustainability: The parameter optimization method based on historical data enables the system to quickly respond to fluctuations in water quality and water volume, achieve efficient and stable operation of wastewater pretreatment, and enhance the environmental friendliness and sustainability of the treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0016] Figure 1 It is a modular schematic diagram of the monitoring and regulating system and the automated reagent debugging system for wastewater pretreatment according to the present invention.

[0017] Figure 2 It is a modular schematic diagram of the preliminary determination module of the drug of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail in combination with its embodiments below; it should be pointed out that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present case. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of this embodiment will become apparent. And the terms describing the positional relationship in the accompanying drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0019] Embodiment 1: Combining with the attached Figure 1 and attached Figure 2This embodiment constructs a monitoring and adjustment and reagent automation debugging system for wastewater pretreatment, which includes a pretreatment module for pretreatment of wastewater, a monitoring module for monitoring relevant parameters of wastewater during the pretreatment process, a preliminary reagent determination module for evaluating and determining the initial reagent dosage of wastewater, and an adjustment module for dynamically generating an optimized reagent re-dosing adjustment plan according to the current treatment effect of the wastewater and the predetermined effluent target.

[0020] The pretreatment module comprises a regulating tank, a demulsification sedimentation tank and a dissolved air flotation tank, and the wastewater is pretreated by passing through the regulating tank, the demulsification sedimentation tank and the dissolved air flotation tank in sequence.

[0021] The wastewater treated in the regulating tank is called the first wastewater. The regulating tank is equipped with a first mixer for stirring the wastewater and a lifting pump for conveying the first wastewater to the demulsification sedimentation tank. During the pretreatment process: the wastewater first enters the regulating tank. The main function of the regulating tank is to collect and homogenize the amount and quality of wastewater, reduce the impact of peak load on subsequent treatment units, and at the same time, prevent the sedimentation of suspended matter in the first wastewater through the first mixer, and provide stable water inlet conditions for the demulsification sedimentation tank and the dissolved air flotation tank. The first wastewater has relatively uniform water quality and stable flow, and is conveyed to the demulsification sedimentation tank by the lifting pump.

[0022] The demulsification sedimentation tank is also provided with a first dosing pump for adding ferrous sulfate solution to the demulsification sedimentation tank, a second dosing pump for adding NaOH solution to the demulsification sedimentation tank, a liquid transfer pump for transferring the second wastewater from the demulsification sedimentation tank to the dissolved air flotation tank, a second mixer for promoting full mixing of the first wastewater with the NaOH solution and the ferrous sulfate solution, a discharge pipe connected to the bottom of the demulsification sedimentation tank, an electric control valve for controlling the closing condition of the discharge pipe, and a sludge discharge pump for driving the sludge and solid sediment to be discharged to the sludge tank through the discharge pipe.

[0023] The treatment goal of the demulsification sedimentation tank is to remove the emulsified oil, colloids and large suspended particles in the first wastewater. By adjusting the pH of the first wastewater and adding ferrous sulfate solution, the first wastewater is fully mixed with the ferrous sulfate solution, and the emulsified oil, colloids and suspended particles react with the ferrous sulfate solution to form larger floc particles. The floc particles gradually settle to the bottom of the tank due to the increase in density to form sludge and solid sediments. After the treatment is completed, the clear liquid on the upper layer of the demulsification sedimentation tank is the second wastewater, and the bottom sediments are sludge and solid sediments. The second wastewater flows out of the demulsification sedimentation tank and enters the dissolved air flotation tank. The sludge and solid sediments are discharged from the demulsification sedimentation tank through a pipeline.

[0024] The dissolved air flotation tank is also provided with a third mixer, a scraper for removing scum floating on the water surface of the dissolved air flotation tank, a jet dissolved air flotation machine, a third dosing pump for adding PAM solution polyacrylamide to the demulsification sedimentation tank and a fourth dosing pump for adding PAC solution polyaluminum chloride to the demulsification sedimentation tank, a drainage pipe connected to the bottom of the dissolved air flotation tank and a valve for controlling the connection between the drainage pipe and the bottom of the dissolved air flotation tank.

[0025] In the dissolved air flotation tank, after adding PAC solution and PAM solution, the fine suspended matter, emulsified oil particles and colloids in the second wastewater are neutralized and condensed to form primary flocs under the action of PAC solution, and the PAM solution further enhances the strength and stability of the flocs through adsorption bridging. A large number of fine bubbles are released into the dissolved air flotation tank through the jet dissolved air flotation machine. The flocs are attached to the fine bubbles and their specific gravity becomes smaller, gradually floating to the water surface to form scum. After the scum is removed by the scraper, the dissolved air flotation tank is the third wastewater that has been treated with flotation purification.

[0026] The multi-stage treatment of the pretreatment module of the present invention can effectively remove emulsified oil, colloids, large suspended matter and fine suspended particles in wastewater, ensuring that the wastewater quality is optimized at each stage. The automated dosage and adjustment of reagents not only reduces the cost of manual operation, but also improves the efficiency of reagent use and avoids waste. At the same time, the pretreatment module can reduce the impact of sudden loads and water quality fluctuations, and improve the load capacity of subsequent treatment units, thereby achieving the stability, energy saving and environmental protection goals of the wastewater treatment process, and achieving sustainable and low-cost treatment effects.

[0027] Embodiment 2: Combining with Figure 1 and attached Figure 2 In addition to the contents of the above embodiments, the monitoring module includes a first liquid level sensor for monitoring the liquid level of the wastewater in the regulating tank, a first COD monitor for checking the chemical oxygen demand of the first wastewater in the demulsification sedimentation tank, a first conductivity meter for monitoring the ammonia nitrogen concentration of the first wastewater in the demulsification sedimentation tank, a first pH monitor for monitoring the acidity and alkalinity in the demulsification sedimentation tank, a turbidity meter for monitoring the turbidity in the emulsion sedimentation tank, a suspended matter monitor for monitoring the suspended matter concentration in the area 0.1m to 0.15m below the liquid surface of the dissolved air flotation tank, and a second COD monitor for checking the chemical oxygen demand of the second wastewater in the dissolved air flotation tank.

[0028] The preliminary determination module for medicines receives the monitoring data transmitted by the PLC and further calculates and processes the detection data. The preliminary determination module for medicines implements the following operation steps: S101: Calculate the stirring speed Nr of the first stirrer: , Nr is the operating speed of the first rotor and the unit is rpm, Nb is the preset basic speed of the first rotor and the unit is rpm, H is the current liquid level in the regulating tank monitored by the first liquid level sensor and the unit is meter, Ht is the reference liquid level in the regulating tank and the unit is meter, k h is the liquid level adjustment coefficient, k d is the adjustment coefficient of the liquid level change rate, is the rate of change of the liquid level of the wastewater in the regulating tank in the last 10 minutes, and the unit is meter per second. Es is the stirring efficiency coefficient obtained by experimental measurement, which is used to indicate the effect of the agitator on the mixing uniformity in the regulating tank. YR is the reference index, and VR ranges from 0.7 to 0.9. S102: Calculate the transmission rate vp of the lift pump to transport the first wastewater in the regulating tank to the demulsification sedimentation tank: , vb is the preset lift pump base transmission rate, k v k is the adjustment coefficient of the liquid level change rate to the pump transmission rate, n is the adjustment coefficient of the agitator speed to the booster pump transmission rate; S103: Calculate the initial amount of NaOH solution INP in the demulsification sedimentation tank NaOH , , Wherein, V1 is the total volume of the first wastewater entering the demulsification sedimentation tank, and the unit is cubic meter, pH 实际 The current pH value of the liquid in the demulsification sedimentation tank monitored by the first pH monitor, pH 目标 ∈[7.0, 9.0], Kp is the acid neutralization capacity coefficient of the wastewater, and the unit of Kp is kg / m2, C NaOH is the concentration of NaOH solution and is expressed in kg / L; S104: Send a command to the first dosing pump to add INP NaOH After the NaOH solution of the capacity enters the demulsification sedimentation tank, the NaOH solution is slowly added to the demulsification sedimentation tank at a preset flow rate Vre through the continuous monitoring of the first pH monitor until the pH reaches 实际 ∈[7.0-9.0] ; S105: Calculate the initial amount of ferrous sulfate solution INP in the demulsification sedimentation tank 硫酸亚铁 : , Kf is the dosage coefficient of ferrous sulfate solution, C1 COD入池is the initial chemical oxygen demand concentration of the first wastewater entering the demulsification sedimentation tank monitored by the first COD monitor. In the demulsification sedimentation tank, emulsified oil, colloids and suspended solids are the main sources of chemical oxygen demand concentration. By removing the emulsified oil, colloids and large suspended solids in the first wastewater in the demulsification sedimentation tank, the chemical oxygen demand concentration in the first wastewater will be reduced. C FeSO4 is the concentration of ferrous sulfate solution; S106: Calculate the initial amount of PAC solution INP in the dissolved air flotation tank PAC : , V2 is the total volume of the second wastewater entering the dissolved air flotation tank and the unit is square meters, Kpc is the PAC solution injection coefficient, SS 入池 is the suspended solids concentration of the second wastewater entering the demulsification sedimentation tank monitored by the suspended solids monitor, C PAC is the concentration of PAC solution; S107: Calculate the amount of PAM solution INP in the dissolved air flotation tank PAM , , where Kpm is the PAC solution dosage coefficient; The data source of the stirring efficiency coefficient Es is realized by the following steps S201-S205: S201: Experimental preparation: Evenly arrange several suspended solids concentration monitoring points at the bottom, middle and top of the regulating tank, use the suspended solids concentration monitor to collect data on the suspended solids concentration at the monitoring points, prepare representative wastewater samples, and add them to the regulating tank. S202: Experimental steps: Mixer start: start the first mixer and set the mixing speed to a fixed value M; Data recording: 5 minutes after the stirring operation, collect the suspended matter concentration data at different monitoring points in the regulating tank; Uniformity analysis: Based on the collected concentration data, calculate the average value μ and standard deviation σ of the suspended matter concentration distribution, as well as the CV value. ; S203: Repeat the experiment: adjust M to different values, and M∈(Nb-20%, Nb+40%), repeat the above experimental steps, and record the CV values ​​at different speeds; S204: Data analysis: Obtain CV values ​​at different rotation speeds M through experiments, draw a relationship curve between CV value and stirring rotation speed M, and use polynomial fitting or exponential fitting to establish a functional relationship between CV and M CV=f(M), and find the optimal point of mixing uniformity, that is, the minimum point of CV value CVmin, in the relationship curve; S205: Define stirring coefficient Es: , where CV(Nb) is the CV value at Nb speed.

[0029] The technicians in this field analyzed the historical wastewater pretreatment records and the results of a large number of repeated wastewater pretreatment experiments. Furthermore, they optimized the amount of NaOH solution added to the demulsification sedimentation tank, analyzed the functional relationship between the pH target value and the actual adjustment effect by fitting the experimental data, established a mathematical model between the amount of NaOH solution added and the pH adjustment, and made corrections based on the actual operation data, so that Kp can accurately reflect the pH. 目标 -pH 实际 The required dosage can ultimately accurately determine the Kp value, thereby achieving efficient pH adjustment and optimization of drug dosage in actual operation.

[0030] The corresponding relationship between the chemical oxygen demand concentration of the first wastewater in the demulsification sedimentation tank and the dosage of ferrous sulfate solution was experimentally measured, the influence of ferrous sulfate solution on the chemical oxygen demand removal effect was analyzed, and the functional relationship between the chemical oxygen demand concentration and the dosage of ferrous sulfate solution was established based on the changing trend of the chemical oxygen demand removal efficiency of ferrous sulfate solution dosage under different working conditions. Through data fitting and experimental correction, the value of Kf was finally determined so that it can reflect the relationship between the chemical oxygen demand concentration of the first wastewater entering the demulsification sedimentation tank and the dosage of ferrous sulfate solution.

[0031] The optimal dosage of PAC solution to achieve flocculation effect in the dissolved air flotation tank was determined through experiments. In the experiment, the dosage of PAC solution was adjusted according to the suspended solids removal target of the wastewater, and the influence of different PAC solution dosages on the flocculation effect was analyzed. The corresponding relationship between the dosage of PAC solution and the flocculation effect of wastewater was fitted based on the suspended solids concentration in the wastewater and the actual dosage efficiency of the PAC solution. The corresponding relationship was then obtained based on the actual operation data for correction, so that it could accurately reflect the corresponding relationship between the dosage of PAC solution and the suspended solids concentration of the second wastewater in the dissolved air flotation tank, thereby determining Kpc.

[0032] The flocculation effect of the combined action of PAM solution and PAC solution was verified through experiments, the influence of the synergistic addition ratio of the two on the removal effect was analyzed, the functional relationship between the addition ratio of PAM solution and PAC solution was fitted, and the experimental data and operation results were combined for correction. Finally, the value of Kpa ​​was determined so that it could reflect the optimal synergistic addition ratio of PAM solution and PAC solution.

[0033] The present invention optimizes the dosage of ferrous sulfate solution, PAC solution and PAM solution and their synergistic ratio through experimental measurement and data analysis, significantly improves the efficiency and stability of wastewater treatment, and ensures the accuracy and adaptability of agent dosage by establishing a functional relationship between key parameters and wastewater purification effect and combining actual operation data correction, thereby improving the pollutant removal effect and reducing agent waste and operation cost. In addition, the scheme enhances the adaptability of the system under variable wastewater conditions, realizes the economy and environmental protection of the wastewater treatment process, and embodies the advantages of data-driven refined management and efficient treatment.

[0034] Embodiment 3: Combining with Figure 1 and attached Figure 2 In addition to the contents of the above embodiments, the adjustment module implements the following operation steps: 301: Calculate the wastewater evolution efficiency EFV1 in the demulsification sedimentation tank: , C1 COD入池 is the initial chemical oxygen demand concentration of the first wastewater entering the demulsification sedimentation tank obtained by the first COD monitor, Tur 入池 The initial turbidity of the first wastewater entering the demulsification sedimentation tank is obtained by monitoring the turbidity meter, CN 入池 The initial ammonia nitrogen concentration of the first wastewater entering the demulsification sedimentation tank is obtained by monitoring the first conductivity meter. After the NaOH solution and the initial amount of ferrous sulfate solution were added to the demulsification sedimentation tank, the minimum chemical oxygen demand concentration in the demulsification sedimentation tank monitored by the first COD monitor was C1 COD稳定， The minimum ammonia nitrogen concentration in the demulsification sedimentation tank obtained by the first conductivity meter is CN 稳定 The minimum turbidity in the demulsification sedimentation tank is Tur 稳定 , α1, α2, and α3 are weight coefficients, and α1+α2+α3=1, wherein α1, α2, and α3 are samples taken by technicians in this field based on historical data of the demulsification sedimentation tank, and the values ​​of α1, α2, and α3 are gradually adjusted through a large number of repeated trainings, so that the EFV1 value is maximized to reflect the demulsification sedimentation tank's effect on the first wastewater purification treatment; rdf1 is the standard reference amount for chemical oxygen demand removal in the demulsification sedimentation tank, rdf2 is the standard reference amount for ammonia nitrogen removal in the demulsification sedimentation tank, and rdf3 is the standard reference amount for turbidity removal in the demulsification sedimentation tank. rdf1 is determined based on the design objectives and expected purification effects of the demulsification sedimentation tank. It is used to quantify the target change in chemical oxygen demand that should be achieved after treatment in the demulsification sedimentation tank. rdf1 reflects the standard reference amount of chemical oxygen demand removed during the treatment of the first wastewater by the demulsification sedimentation tank. rdf2 is determined based on the design objectives and expected purification effects of the demulsification sedimentation tank. It is used to quantify the target change in ammonia nitrogen concentration that should be achieved after the demulsification sedimentation tank is treated. rdf2 reflects the standard reference amount of ammonia nitrogen removed during the treatment of the first wastewater by the demulsification sedimentation tank. It is used to measure whether the demulsification sedimentation tank has achieved the expected design effect in terms of ammonia nitrogen removal. rdf3 is determined based on the design objectives and expected purification effects of the demulsification sedimentation tank. It is used to quantify the target change in turbidity that should be achieved after treatment in the demulsification sedimentation tank. rdf3 reflects the standard reference amount of turbidity removal during the treatment of the first wastewater in the demulsification sedimentation tank. It is an indicator for measuring effluent clarity and flocculation sedimentation effect.

[0035] 302: Calculate and obtain the evolution efficiency EFV2 of the dissolved air flotation tank for the second wastewater: , The initial chemical oxygen demand concentration C1 of the second wastewater in the dissolved air flotation tank obtained by the second COD monitor COD再处理 , SS 入池 is the suspended solids concentration of the second wastewater entering the demulsification sedimentation tank monitored by the suspended solids monitor, After the initial amount of PAC solution and PAM solution is added to the dissolved air flotation tank, the minimum chemical oxygen demand concentration C1 in the dissolved air flotation tank is monitored by the second COD monitor COD最后 , the minimum suspended solids concentration SS of the dissolved air flotation tank monitored by the suspended solids monitor 最后 , β1 and β2 are weight coefficients, and β1+β2=1, wherein β1 and β2 are determined by technicians in this field based on historical data of dissolved air flotation tanks as samples, and the values ​​of β1 and β2 are gradually adjusted after a large number of repeated trainings, so that the EFV2 value is maximized to reflect the purification effect of the dissolved air flotation tank on the second wastewater; tdw1 is the standard reference amount of chemical oxygen demand removal of the dissolved air flotation tank, and tdw2 is the standard reference amount of suspended solids removal of the dissolved air flotation tank. tdw1 is determined based on the design objectives and expected purification effects of the dissolved air flotation tank. It is used to quantify the target change in chemical oxygen demand that should be achieved after treatment in the dissolved air flotation tank. tdw1 reflects the standard reference amount of chemical oxygen demand removed during the treatment of the second wastewater by the dissolved air flotation tank. tdw2 is determined based on the design objectives and expected purification effects of the dissolved air flotation tank, and is used to quantify the target change value of suspended solids that should be achieved after treatment in the demulsification sedimentation tank. rdf2 reflects the standard reference amount of suspended solids removed during the treatment of the second wastewater by the demulsification sedimentation tank, and is used to measure whether the demulsification sedimentation tank has achieved the expected design effect in terms of suspended solids removal. S303: EFV1>EFV1 threshold When the demulsification sedimentation tank reaches the expected purification target for the first wastewater, it is judged that the demulsification sedimentation tank does not need to be supplemented with ferrous sulfate solution; When EFV1≤EFV1 threshold When the demulsification sedimentation tank is judged to have not achieved the expected purification target for the first wastewater, it is necessary to add ferrous sulfate solution to the demulsification sedimentation tank until EFV1> EFV1 threshold ; S304: EFV2>EFV2 threshold When the dissolved air flotation tank is judged to have achieved the expected purification target for the second wastewater, it is not necessary to add the PAC solution and the PAM solution to the demulsification sedimentation tank; When EFV1≤EFV1 threshold When the dissolved air flotation tank fails to achieve the expected purification target for the second wastewater, it is necessary to add PAC solution and PAM solution to the demulsification sedimentation tank until EFV2> EFV2 threshold ; EFV1 threshold EFV1 is the lower limit threshold for evaluating the purification degree of the first wastewater by the demulsification sedimentation tank. threshold The numerical value is determined by the design objectives and expected purification effects of the demulsification sedimentation tank in the art, and different EFV1 of the demulsification sedimentation tank in the empirical data is analyzed by statistical analysis, machine learning algorithm or ROC curve analysis. threshold A value is set to effectively distinguish whether the demulsification sedimentation tank has achieved the expected purification effect on the first wastewater; EFV2 threshold EFV2 is the lower threshold used to evaluate the degree of purification of the second wastewater by the dissolved air flotation tank. threshold The value of is determined by the design objectives and expected purification effects of the dissolved air flotation tank in the art, and different EFV2 of the dissolved air flotation tank in the empirical data are analyzed by statistical analysis, machine learning algorithm or ROC curve analysis. threshold A value is set to effectively distinguish whether the degree of purification of the second wastewater by the dissolved air flotation tank reaches the expected purification effect; The preliminary determination module and adjustment module of the reagent are integrated and built on the cloud platform. The electrical equipment in the pretreatment module and the monitoring module are electrically connected through PLC. The PLC is responsible for receiving the real-time data of each monitoring instrument in the monitoring module, and uploading the data to the cloud platform for processing through communication technology. At the same time, the cloud platform generates optimization control instructions based on real-time data analysis and sends them to the PLC through communication technology. The PLC accurately transmits the optimization control instructions to each electrical equipment in the pretreatment module and dynamically adjusts its operating parameters, thereby realizing intelligent monitoring and precise dosing control in the wastewater pretreatment process.

[0036] The adjustment module uses EFV1 and EFV2, combined with multiple key indicators such as chemical oxygen demand, ammonia nitrogen concentration, turbidity and suspended solids concentration, to achieve accurate quantitative evaluation of the purification effects of demulsification sedimentation tanks and dissolved air flotation tanks. It uses weight coefficients and standard reference values ​​to dynamically optimize the amount of reagents added, significantly improves the treatment effect and reduces reagent waste. The optimization parameters and thresholds are determined through historical data, statistical analysis and machine learning algorithms to ensure the intelligence and adaptability of the system operation, enhance the stability and efficiency of wastewater treatment, reduce operating costs, and achieve efficient, economical and sustainable wastewater treatment goals.

[0037] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from that described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configuration may be combined in a similar manner. In addition, as technology develops, the elements therein may be updated, i.e., many elements are examples and do not limit the scope of the present disclosure or claims. And it should be understood that after reading the contents of the record of the present invention, the technician may make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A monitoring and adjustment system and reagent automation debugging system for wastewater pretreatment, characterized in that: The monitoring, adjustment and automated reagent debugging system includes a pretreatment module for pretreatment of wastewater, a monitoring module for monitoring relevant parameters of wastewater during the pretreatment process, a preliminary reagent determination module for evaluating and determining the initial reagent dosage of wastewater, and an adjustment module for dynamically generating an optimized reagent re-dosing adjustment plan based on the current treatment effect of the wastewater and the predetermined effluent target. The relevant parameters include at least the pH value, chemical oxygen demand, suspended solids concentration, ammonia nitrogen concentration, turbidity and liquid level of the wastewater.

2. The monitoring, adjustment and automated drug debugging system according to claim 1, characterized in that: The pretreatment module includes a regulating tank, a demulsification sedimentation tank and a dissolved air flotation tank. The wastewater is pretreated by passing through the regulating tank, the demulsification sedimentation tank and the dissolved air flotation tank in sequence. The wastewater treated in the equalization tank is called the first wastewater. The equalization tank is equipped with a first mixer for mixing the wastewater and a lifting pump for transferring the first wastewater to the demulsification sedimentation tank. The main function of the equalization tank is to collect and homogenize the wastewater volume and water quality, and provide stable water inlet conditions for the demulsification sedimentation tank and the dissolved air flotation tank.

3. The monitoring, adjustment and automated drug debugging system according to claim 2, characterized in that: The demulsification sedimentation tank is also provided with a first dosing pump for adding ferrous sulfate solution to the demulsification sedimentation tank, a second dosing pump for adding NaOH solution to the demulsification sedimentation tank, a liquid transfer pump for transferring the second wastewater from the demulsification sedimentation tank to the dissolved air flotation tank, a second mixer for promoting full mixing of the first wastewater with the NaOH solution and the ferrous sulfate solution, a discharge pipe connected to the bottom of the demulsification sedimentation tank, an electric control valve for controlling the closing condition of the discharge pipe, and a sludge discharge pump for driving the sludge and solid sediment to be discharged to the sludge tank through the discharge pipe. The treatment goal of the demulsification sedimentation tank is to remove the emulsified oil, colloids and large suspended particles in the first wastewater. By adjusting the pH of the first wastewater and adding ferrous sulfate solution, the first wastewater is fully mixed with the ferrous sulfate solution, and the emulsified oil, colloids and suspended particles react with the ferrous sulfate solution to form larger floc particles. The floc particles gradually settle to the bottom of the tank due to the increase in density to form sludge and solid sediments. After the treatment is completed, the clear liquid on the upper layer of the demulsification sedimentation tank is the second wastewater, and the bottom sediments are sludge and solid sediments. The second wastewater flows out of the demulsification sedimentation tank and enters the dissolved air flotation tank. The sludge and solid sediments are discharged from the demulsification sedimentation tank through a pipeline.

4. The monitoring, adjustment and automated drug debugging system according to claim 3, characterized in that: The dissolved air flotation tank is also provided with a third mixer, a scraper for removing floating scum on the surface of the dissolved air flotation tank, a jet dissolved air flotation machine, a third dosing pump for adding PAM solution polyacrylamide to the demulsification sedimentation tank, a fourth dosing pump for adding PAC solution polyaluminium chloride to the demulsification sedimentation tank, a drainage pipe connected to the bottom of the dissolved air flotation tank, and a valve for controlling the connection between the drainage pipe and the bottom of the dissolved air flotation tank. In the dissolved air flotation tank, after adding PAC solution and PAM solution, the fine suspended matter, emulsified oil particles and colloids in the second wastewater are neutralized and condensed to form primary flocs under the action of PAC solution, and the PAM solution further enhances the strength and stability of the flocs through adsorption bridging. A large number of fine bubbles are released into the dissolved air flotation tank through the jet dissolved air flotation machine. The flocs are attached to the fine bubbles and their specific gravity becomes smaller, gradually floating to the water surface to form scum. After the scum is removed by the scraper, the dissolved air flotation tank is the third wastewater that has been treated with flotation purification.

5. The monitoring, regulating and automated drug debugging system according to claim 4, characterized in that: The monitoring module includes a first liquid level sensor for monitoring the liquid level of the wastewater in the regulating tank, a first COD monitor for checking the chemical oxygen demand of the first wastewater in the demulsification sedimentation tank, a first conductivity meter for monitoring the ammonia nitrogen concentration of the first wastewater in the demulsification sedimentation tank, a first pH monitor for monitoring the acidity and alkalinity in the demulsification sedimentation tank, a turbidity meter for monitoring the turbidity in the emulsion sedimentation tank, a suspended matter monitor for monitoring the suspended matter concentration in the area 0.1m to 0.15m below the liquid surface of the dissolved air flotation tank, and a second COD monitor for checking the chemical oxygen demand of the second wastewater in the dissolved air flotation tank.

6. The monitoring, regulating and automated drug debugging system according to claim 5, characterized in that: The preliminary determination module for medicines receives the monitoring data transmitted by the PLC and further calculates and processes the detection data. The preliminary determination module for medicines implements the following operation steps: S101: Calculate the stirring speed Nr of the first stirrer: ， Nr is the operating speed of the first rotor in revolutions per minute, Nb is the preset basic speed of the first rotor in revolutions per minute, H is the current liquid level in the regulating tank monitored by the first liquid level sensor in meters, Ht is the reference liquid level in the regulating tank in meters, k h is the liquid level adjustment coefficient, k d is the adjustment coefficient of the liquid level change rate, is the rate of change of the liquid level of the wastewater in the regulating tank in the last 10 minutes, and the unit is meter per second. Es is the stirring efficiency coefficient obtained by experimental measurement, which is used to indicate the effect of the agitator on the mixing uniformity in the regulating tank. YR is the reference index, and VR ranges from 0.7 to 0.

9. S102: Calculate the transmission rate vp of the lift pump to transport the first wastewater in the regulating tank to the demulsification sedimentation tank: ， vb is the preset lift pump base transmission rate, k v k is the adjustment coefficient of the liquid level change rate to the pump transmission rate, n is the adjustment coefficient of the agitator speed to the booster pump transmission rate; S103: Calculate the initial amount of NaOH solution INP in the demulsification sedimentation tank NaOH溶液 , , Wherein, V1 is the total volume of the first wastewater entering the demulsification sedimentation tank and the unit is cubic meter, pH 实际 The current pH value of the liquid in the demulsification sedimentation tank monitored by the first pH monitor, pH 目标 ∈[7.0, 9.0], Kp is the acid neutralization capacity coefficient of the wastewater, and the unit of Kp is kg / m2, C NaOH is the concentration of NaOH solution, and the unit is kg / L; S104: Send a command to the first dosing pump to add INP NaOH After the NaOH solution of the capacity enters the demulsification sedimentation tank, the first pH monitor continuously monitors the situation and slowly adds the NaOH solution to the demulsification sedimentation tank at a preset flow rate Vre until the pH reaches 实际 ∈[7.0-9.0] ; S105: Calculate the initial amount of ferrous sulfate solution INP in the demulsification sedimentation tank 硫酸亚铁 : ， Kf is the dosage coefficient of ferrous sulfate solution, C1 COD入池 is the initial chemical oxygen demand concentration of the first wastewater entering the demulsification sedimentation tank monitored by the first COD monitor. In the demulsification sedimentation tank, emulsified oil, colloids and suspended solids are the main sources of chemical oxygen demand concentration. By removing the emulsified oil, colloids and large suspended solids in the first wastewater in the demulsification sedimentation tank, the chemical oxygen demand concentration in the first wastewater will be reduced. C FeSO4 is the concentration of ferrous sulfate solution; S106: Calculate the initial amount of PAC solution INP in the dissolved air flotation tank PAC : ， V2 is the total volume of the second wastewater entering the dissolved air flotation tank and the unit is square meters, Kpc is the PAC solution injection coefficient, SS 入池 is the suspended solids concentration of the second wastewater entering the demulsification sedimentation tank monitored by the suspended solids monitor, C PAC is the concentration of PAC solution; S107: Calculate the amount of PAM solution added to the dissolved air flotation tank INP PAM , , where Kpm is the PAC solution dosage coefficient.

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