Whole-flow operation regulation and control system for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment whole-process operation regulation and control system. The system comprises a security protection and environment management system, a sensing and monitoring system and an operation regulation and control system. The security and protection and environment management system comprises a security and protection access control system, a living quarter security and protection system and an inspection system; the sensing and monitoring system comprises water quality monitoring, water quantity monitoring, process parameter monitoring and equipment state monitoring; the operation regulation and control system comprises a water inlet pump station multi-mode intelligent control system, a grating operation system, an aeration grit chamber automatic control system, a biological tank in-situ precise denitrification and precise dosing system, an excess sludge automatic discharge accounting system, a displacement-speed rapid aeration system, a sludge homogenizing tank automatic sludge supplementing system and an efficient sedimentation tank automatic control system. An analysis regulation and control system; and an early warning and exception handling system. The sewage treatment efficiency and stability can be improved, the energy consumption and carbon emission of sewage treatment can be remarkably reduced, and more energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a full-process operation and control system for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of subjecting the generated sewage to a series of physical, chemical and biological treatment processes to remove pollutants such as organic matter, inorganic matter, suspended matter, bacteria, etc., so that it meets environmental emission standards or reusable water quality requirements; sewage treatment is often carried out in sewage treatment plants, and the existing ones mostly use biological methods for treatment. In the process of sewage treatment, anaerobic, anoxic, aerobic, sedimentation and deep treatment processes are used to make the effluent water quality meet the emission requirements.

[0003] As a traditional high-energy-consuming industry, sewage treatment has great potential for energy conservation and emission reduction. With the increasing awareness of environmental protection and the demand for sustainable development, the environmental friendliness and energy efficiency of sewage treatment have become key considerations. At the same time, with the acceleration of urbanization and the increase in industrial activities, the demand for sewage treatment is growing, and higher requirements are also placed on the efficiency and sustainability of the system. In recent years, technologies such as big data, the Internet of Things, smart manufacturing, image recognition, and artificial intelligence have become increasingly mature, and the rapid development of intelligent and automated technologies has provided new possibilities for improving sewage treatment efficiency and reducing energy consumption.

[0004] Therefore, the present invention proposes a full-process operation and control system for sewage treatment, which controls the operation and management of the entire sewage treatment plant and realizes a fully automatic operation and control process for sewage treatment; continuously improves the energy-saving and intelligent operation level, continuously improves the ecological environment water quality, and protects public health; provides more efficient, intelligent and environmentally friendly solutions for the sewage treatment industry, and makes a positive contribution to the development of environmental protection. Summary of the invention

[0005] The purpose of the present invention is to provide a full-process operation and control system for sewage treatment to solve the problems of the existing waterless treatment system, which has a low degree of automation, is not convenient for operation and control, and is not conducive to stable operation and energy saving and consumption reduction.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a sewage treatment full-process operation and control system, including a security and environmental management system, a sensing and monitoring system, and an operation and control system;

[0007] The security and environmental management system includes a security access control system, a living area security system and a patrol inspection system;

[0008] The sensing and monitoring system includes water quality monitoring, water quantity monitoring, process parameter monitoring and equipment status monitoring;

[0009] The operation and control system includes multi-mode intelligent control of the water inlet pump station, grille operation system, aeration sand settling tank automatic control system, biological pool in-situ precise denitrification, precise dosing system, automatic discharge accounting of residual sludge, displacement-speed rapid aeration system, sludge homogenization tank automatic mud filling system, efficient sedimentation tank automatic control system, analysis and control system, and early warning and abnormal handling system;

[0010] The grille operation system predicts the water volume in another period of time after time t by counting the water volume in a period of time before time t; the actual time required for the grille to operate under the designed flow rate is calculated based on the predicted water volume, and the automatic start, stop and switch of the grille is realized based on the actual time;

[0011] The displacement-speed rapid aeration system includes displacement-speed cascade PID control and predictive pre-feedback regulation; displacement-speed cascade PID control is performed through dissolved oxygen changes and aeration air volume regulation, and the predicted dissolved oxygen value after a period of time is predicted by monitoring the change value of dissolved oxygen in a certain period of time, and the predicted dissolved oxygen value is used as the regulation negative feedback value; the displacement-speed rapid aeration system is linked to the water inlet flow rate, and the aeration volume is adjusted in time according to the fluctuation of the water inlet flow rate;

[0012] The high-efficiency sedimentation tank automatic control system includes an automatic backwashing system and an automatic mud discharge system, and is linked with a precise dosing system; the precise dosing system and the automatic backwashing system are used to ensure the effluent quality, and the automatic mud discharge system is used to discharge mud, thereby improving the backwashing efficiency.

[0013] Furthermore, the security access control system includes a fully automatic weight calculation platform, a white list of employee vehicles, and an external vehicle approval system; the fully automatic weight calculation platform is used for sludge transportation and pharmaceutical weighing; the white list of employee vehicles includes official vehicles and employee vehicles;

[0014] The living area security system includes employee face recognition and floor monitoring system; employee face recognition is used to set access permissions; the floor monitoring system is used for personnel tracking and emergency assistance alarm;

[0015] The inspection system includes a remote monitoring system and an operation and maintenance inspection system; the remote monitoring system is used for online monitoring of process points and key parts, and the operation and maintenance inspection system is used for safety inspection of recycled water and substations.

[0016] Furthermore, the water quality monitoring includes inlet water quality monitoring, outlet water quality monitoring and process water quality monitoring;

[0017] The water volume monitoring includes the water volume monitoring of the day, the water volume monitoring of the previous day, the water volume of biological treatment, the water flow monitoring and the recycled water usage;

[0018] The process parameter monitoring includes detection of activated sludge concentration, dissolved oxygen concentration in biological treatment, recirculation ratio in biochemical treatment, oxygen supply ratio - linking water inlet, key structure liquid level monitoring, redox potential monitoring and intelligent microbial phase observation;

[0019] The equipment status monitoring includes lifting equipment, oxygen supply equipment, filtering equipment, deodorizing equipment, sludge equipment, various valves and gates, and flow state adjustment equipment.

[0020] Furthermore, the grid operation system reads the time t 0 The cumulative water inflow during the first T period of time is X j , and the X j Based on the design flow rate X, calculate the actual operation time t that the grille needs to operate in a specific time period t in the future 1 ; Where T = nt, t 1 =X j / (nX); where n≥1;

[0021] t 1 Compare with t to determine the automatic start and stop of the grille and the automatic switching between them.

[0022] 8. A sewage treatment full-process operation and control system according to claim 1, characterized in that: in the displacement-speed rapid aeration system, the current period of time S is read 1 The average dissolved oxygen DO 1 And some time ago S 1 The average value of dissolved oxygen change in ' 2 , where S 1 =S 1 ′,S 1 With S 1 The time interval between ′ is △S, and the dissolved oxygen change rate DO at the current moment is obtained. v =(DO 1 -DO 2 ) / △S, and predict the predicted value of dissolved oxygen DO at time k after a long period of time S 预测 =DO 1 +S / △S*(DO 1 -DO 2 ), and set the target value of dissolved oxygen DO at time k 目标 ;

[0023] DO 目标 With DO 预测The difference between the target dissolved oxygen change rate at time k is used as the negative feedback value, and the target dissolved oxygen change rate at time k is calculated through the displacement loop PID; the difference between the target dissolved oxygen change rate at time k and the dissolved oxygen change rate at the current moment is used as the negative feedback value, and the change amount of the control element is calculated through the speed loop PID to realize the adjustment of the blower opening.

[0024] Furthermore, the operation of the efficient sedimentation tank automatic control system includes the following steps:

[0025] S1. Install online liquid level monitoring instruments and online mud level monitoring instruments in the high-efficiency sedimentation tank, set up online turbidity monitoring instruments on the outlet side of the high-efficiency sedimentation tank, and set up online orthophosphate monitoring instruments on the inlet side;

[0026] S2. When it is detected that the orthophosphate on the inlet side reaches the set upper limit, the precise dosing system is started and the dephosphorization agent is added through the precise dosing system;

[0027] S3. When the effluent turbidity is detected to reach the upper limit, the backwash control system and the automatic mud discharge system are started.

[0028] Furthermore, in the S3, the inlet gate and outlet gate of the high-efficiency sedimentation tank are first closed. When the gates are closed, the sludge pump is started and the first sludge discharge operation is performed; after the first sludge discharge is completed, the aeration pump is turned on to backwash the inclined pipe by aeration. After the backwashing is completed, it is settled quietly, and then the sludge pump is turned on again to perform the second sludge discharge operation. After the second sludge discharge is completed, the sludge pump is turned off, the inlet and outlet gates of the high-efficiency sedimentation tank are opened, and the system resumes operation.

[0029] Beneficial effects of the present invention:

[0030] 1. The system of the present invention can significantly reduce the energy consumption and carbon emissions of sewage treatment, help reduce operating costs, improve efficiency, and has important significance for energy conservation and emission reduction, environmental protection and ecological civilization construction;

[0031] 2. The system of the present invention optimizes the treatment process, improves the efficiency and stability of sewage treatment, avoids substandard discharge and environmental pollution, and helps to improve the long-term sustainability of the sewage treatment system;

[0032] 3. The system of the present invention improves the level of energy-saving and intelligent operation, continuously improves the ecological environment and water quality, protects public health, can provide more efficient, intelligent and environmentally friendly solutions for the sewage treatment industry, and plays a positive role in the development of environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the overall architecture diagram of the system of the present invention;

[0034] Figure 2It is the framework diagram of the security and environmental management system of the present invention;

[0035] Figure 3 It is the framework diagram of the water quality monitoring system of the present invention;

[0036] Figure 4 It is the framework diagram of the water quantity monitoring system of the present invention;

[0037] Figure 5 It is the framework diagram of the process parameter monitoring system of the present invention;

[0038] Figure 6 It is the framework diagram of the equipment status monitoring system of the present invention;

[0039] Figure 7 It is a partial subsystem architecture diagram of the operation control system of the present invention;

[0040] Figure 8 It is a partial subsystem architecture diagram of the operation control system of the present invention;

[0041] Fig. 9 It is a partial subsystem architecture diagram of the operation control system of the present invention;

[0042] Fig.10 It is a schematic diagram of the operation logic of the grid operation system of the present invention;

[0043] Fig.11 It is a control interface diagram of the displacement-speed rapid aeration system of the present invention. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] like Figure 1 As shown, the system of the present invention includes a security and environmental management system, a perception and monitoring system, and an operation and control system.

[0046] like Figure 2As shown, the security and environmental management system includes a security access control system, a living area security system and a patrol system; among them, the security access control system includes a fully automatic weight calculation platform, an employee vehicle whitelist and an external vehicle approval system; the fully automatic weight calculation platform is used for sludge transfer and reagent weighing, sludge transfer is used to calculate the amount of sludge transferred to the sludge receiving unit, and the reagent weighing is used to calculate the usage of each reagent in the factory area; the employee vehicle whitelist includes official vehicles and employee vehicles; the living area security system includes an employee face recognition system and a floor monitoring system, through which the employee face recognition system is used to set access permissions, and the floor monitoring system is used to track personnel and provide emergency rescue alarms; the patrol system includes a remote monitoring system and an operation and maintenance patrol system, the remote monitoring system is used for online patrols of process points and key areas, and the operation and maintenance patrol system is used for safety patrols of recycled water and substations.

[0047] like Figure 1 , as shown in Figures 3-6, the perception and monitoring system includes water quality detection, water quantity monitoring, process parameter monitoring and equipment status monitoring.

[0048] Water quality testing includes inlet water quality testing, effluent water quality testing and process water quality monitoring. The inlet water quality testing indicators include chemical oxygen demand, ammonia nitrogen, total phosphorus, pH value and inlet water temperature; the effluent water quality monitoring indicators include chemical oxygen demand, ammonia nitrogen, total phosphorus, pH value and total nitrogen; process water quality monitoring includes biological reaction monitoring and tertiary treatment monitoring. The biological reaction monitoring indicators include nitrate nitrogen, water temperature, orthophosphate and ammonia nitrogen; the tertiary treatment monitoring indicators include total phosphorus, total nitrogen and ammonia nitrogen; water quality monitoring plays a guiding role in the operation and management of sewage treatment plants, and can make timely adjustments to the operating process through water quality fluctuations, which plays a positive and beneficial role in ensuring the effluent water quality.

[0049] Water volume monitoring includes water volume monitoring for the current day, average daily water volume of the previous day, water volume of biological treatment proportion, effluent flow volume and recycled water usage; water volume monitoring for the current day includes the accumulated value of water volume for the current day and the instantaneous water volume curve for the current day; average daily water volume of the previous day includes the accumulated treatment volume of the previous day and the accumulated total volume calculation of the previous day; water volume of biological treatment proportion includes water volume monitoring and proportion monitoring of multiple series of biological pools (to avoid excessive backflow or abnormal aeration); effluent flow volume includes the flow rate of environmental water bodies that meets the standards and the recycled water recycling volume; recycled water usage includes external recycled water usage and internal recycled water usage, among which external recycled water usage includes water usage for municipal landscape greening and cooling and regeneration of production units, and internal recycled water usage includes water usage for greening and fire fighting and production reuse water; water volume monitoring plays a positive role in ensuring the stable operation of sewage treatment plants, and also helps to promote the comprehensive and circular utilization of water resources.

[0050] Process parameter monitoring includes activated sludge concentration monitoring, biological treatment dissolved oxygen monitoring, biochemical treatment internal reflow ratio, oxygen supply ratio-linked water inlet, key structure liquid level monitoring, redox potential monitoring and microbial microscopic observation; the activated sludge concentration is fed back to the residual sludge automatic discharge accounting system for linkage adjustment, the biological treatment dissolved oxygen concentration is fed back to the displacement-speed rapid aeration system for linkage adjustment, the biochemical treatment internal reflow ratio is fed back to the in-situ precise denitrification system for linkage adjustment, the oxygen supply ratio-linked water inlet is used as a reference for energy consumption analysis, and the key structure liquid level monitoring, redox potential monitoring and microbial microscopic observation are used as references for production analysis; through process parameter monitoring and linkage adjustment of each system, the continuous and stable operation of the treatment process is guaranteed.

[0051] Equipment status monitoring includes lifting equipment, oxygen supply equipment, filtering equipment, deodorization equipment, sludge equipment, various valves and gates, and flow adjustment equipment; for lifting equipment, monitor frequency, temperature, current and abnormal alarms; for oxygen supply equipment, monitor frequency, temperature, current, abnormal alarms and gas supply pressure; for filtering equipment, monitor operating time, temperature, current and abnormal alarms; for deodorization equipment, monitor current, abnormal alarms, and link sludge removal and deodorization with production equipment deodorization. When linking sludge removal and deodorization, identify the vehicle entering the area and select the deodorization area; for sludge equipment, monitor the processing flow, dosing ratio, temperature, sludge concentration, operating pressure and silo level; for various valves and gates, monitor the switch ratio and switch automatically; for flow adjustment equipment, monitor abnormal alarms and current, and start and stop with one button; equipment status is the basis for ensuring stable production operation.

[0052] like Figure 1 As shown in Figures 7-10, the operation and control system includes multi-mode intelligent control of the water inlet pump station, screen operation system, aeration and grit chamber automatic control system, in-situ precise denitrification in the biological pool, precise dosing system, automatic discharge accounting of residual sludge, displacement-speed rapid aeration system, automatic sludge replenishment system for the sludge homogenization tank, automatic control system for the efficient sedimentation tank, analysis and control system, and early warning and abnormal handling system.

[0053] The multi-mode intelligent control of the water intake pump station includes automatic timed switching, multi-mode control of liquid level and flow, activation of backup pumps in response to abnormal alarms, and big data model simulation and regulation.

[0054] The grid operation system includes automatic timing switching, previous cycle scanning comparison and water volume and liquid level dual-mode control.

[0055] Generally, coarse and fine screens are intermittently controlled according to the liquid level difference or timing control; however, for different incoming conditions, the water flow rate is different. At low load, energy saving and reducing the screen operation time are given priority, and at high load, high operation time is maintained to ensure water flow efficiency. When the timed intermittent operation is performed, the timing time will be related to the water flow rate, and the start and stop times of multiple screens must be staggered to ensure that at least one screen is in operation.

[0056] During the process, the grid operation system reads the time t 0 The cumulative water inflow during the first T period of time is X j , and the X j Based on the design flow rate X, calculate the actual operation time t that the grille needs to operate in a specific time period t in the future 1 ; Where T = nt, t 1 =X j / (nX); where n≥1; t 1 Compare with t to determine the automatic start and stop of the grille and the automatic switching between them.

[0057] like Fig.10 The following is a logic diagram of the grille operation control, where there are two grilles, T is 1h, t is 15min, and n is 4; the system reads the cumulative water inflow X in the previous hour. j (m 3 ), X is 4200m 3 / h.

[0058] When G i >1, there is no available grille, and an alarm is issued for maintenance. i When ≤1, the system continues to run.

[0059] G i =0,t 1 ≤15min, for example, when G i = 0, both grids are operating normally. 1 ≤15min, indicating that only one grille needs to be operated within every 15 minutes; the downtime duration is t 2 =15-t 1 ; and additionally set the downtime duration t 3 and t 4 , where t 3 =15,t 4 =0.

[0060] In the first 15-minute cycle, the first grid runs t 1 Time, the second grille runs t 4 time, that is, it does not run; then the first grille stops t 2 time, the second grille stops t3 Time, that is, stop for 15 minutes, and the second grille does not start; this cycle is the automatic start and stop process of the first grille.

[0061] In the second 15-minute cycle, the first grid operates at t 4 time, that is, not running, the second grille runs t 1 time; then the first grille stops t 3 time, that is, stop for 15 minutes, the first grille does not start, and the second grille stops t 2 Time; this cycle is the automatic switching between the first grille and the second grille and the automatic start and stop of the second grille.

[0062] By looping the above process in sequence, the mutual switching and automatic start and stop process between the two grilles can be realized. The subsequent logical principles are consistent and can be easily understood by those skilled in the art, so they will not be elaborated on.

[0063] The automatic control system of the aerated grit chamber controls the periodic operation of the sand separation equipment; the in-situ precise denitrification of the biological pool includes the calculation and adjustment of the carbon source dosage and the prediction of future effluent and negative feedback adjustment; the precise dosing system includes the precise addition of sodium hypochlorite, phosphorus removal agents, and sludge conditioning agents, as well as multi-mode addition of fixed flow, fixed frequency, and fixed ratio; the automatic discharge calculation of residual sludge includes fixed sludge age control, fixed sludge discharge volume control, and automatic calculation of the sludge discharge volume based on internal and external reflow concentrations.

[0064] The displacement-speed rapid aeration system includes automatic switching of aeration equipment fans, displacement-speed cascade PID control + predictive pre-feedback regulation, calculation of oxygen supply ratio and multi-series gas volume distribution.

[0065] The biological system displacement-speed rapid aeration system is a large lag control system. According to data statistics, the dissolved oxygen will not change significantly until 5-15 minutes after the air volume is adjusted. Under low dissolved oxygen conditions, when there is no excessive aeration, the dissolved oxygen will not rise significantly until more than half an hour. Therefore, traditional PID regulation is difficult to control stably. The system of the present invention adopts displacement-speed cascade PID control + predictive pre-feedback regulation control to ensure that the dissolved oxygen is within a stable range.

[0066] In the study, the filtering time S is monitored and calculated. 1 The average dissolved oxygen DO 1 .

[0067] For example, to monitor the average value of dissolved oxygen within 1 minute, the dissolved oxygen can be read through the DO electrode. The time interval can be one reading per second. The readings within 1 minute are summarized and then divided by the total time to get the average value of dissolved oxygen during this period of time.

[0068] Based on the above average dissolved oxygen value, the dissolved oxygen change in a long period of time S is predicted and calculated, where S>S 1 .

[0069] In the process, first 1 Another short time ago S 1 The average dissolved oxygen DO in 2 Calculate, S 1 =S 1 ′, the time interval between the two time periods is △S, then the change in dissolved oxygen during △S time is DO 1 -DO 2 , in S 1 The dissolved oxygen change rate DO at the moment (current) v =(DO 1 -DO 2 ) / △S

[0070] For example, the average dissolved oxygen value within the current 1 minute is calculated to obtain DO 1 , while monitoring the average dissolved oxygen DO 5 minutes ago 2 , then the change in dissolved oxygen within 5 minutes is DO 1 -DO 2 .

[0071] Therefore, the change in dissolved oxygen over a long period of time S can be predicted as S / △S*(DO 1 -DO 2 ), then the dissolved oxygen value after a long period of time S is DO 预测 =DO 1 +S / △S*(DO 1 -DO 2 ).

[0072] Set the target value of dissolved oxygen DO after a long period of time S 目标 , then the deviation of dissolved oxygen change at time k after a long period of time S is e(k 1 )=DO 目标 -DO 预测 .

[0073] Then according to the displacement loop PID, the target dissolved oxygen change rate at time k after a long period of time S is:

[0074]

[0075] In the formula, kp 1 is the proportionality coefficient; ki 1 is the integral coefficient; kd 1is the differential coefficient; each coefficient is an empirical parameter that controls the stability and accuracy of PID regulation.

[0076] According to the target dissolved oxygen change rate at time k, the control quantity U of the actuator at time k is calculated according to the speed loop PID. k :

[0077]

[0078] In the formula, e(k 2 )=DO vk -DO v ;

[0079] DO v kp is the current dissolved oxygen change rate; 2 is the proportionality coefficient; ki 2 is the integral coefficient; kd 2 is the differential coefficient; each coefficient is an empirical parameter that controls the stability and accuracy of PID regulation.

[0080] Therefore, the blower opening can be adjusted, and the blower opening (frequency) target value is X+U k , where X is the current opening.

[0081] In precise aeration, changes in water volume regulation also lead to rapid changes in dissolved oxygen. Data observations show that after adjusting the water volume, dissolved oxygen will change rapidly about 30 minutes later. At this time, feedback regulation is already delayed. The dissolved oxygen can be adjusted in advance through comprehensive judgment of the gas-water ratio and the current dissolved oxygen to ensure the stability of the dissolved oxygen.

[0082] The automatic control system of the high-efficiency sedimentation tank includes an automatic backwashing system and an automatic mud discharge system; the automatic backwashing system automatically backwashes the high-efficiency sedimentation tank and automatically discharges mud during cleaning to improve the efficiency of backwashing.

[0083] Specifically, an online liquid level monitoring instrument is installed in the high-efficiency sedimentation tank, an online turbidity monitoring instrument is set on the outlet side of the high-efficiency sedimentation tank, and an online orthophosphate monitoring instrument is set on the inlet side; when it is monitored that the orthophosphate on the inlet side reaches the set upper limit, the precise dosing system is started, and the dephosphorization agent is added through the precise dosing system; when it is monitored that the outlet turbidity reaches the upper limit, the backwash control system is started, and at this time, the control program corresponding to the high-efficiency sedimentation tank is automatically started; first, the inlet gate and the outlet gate of the high-efficiency sedimentation tank are closed, and through equipment status monitoring, when the gate is closed in place, the pump post valve of the sludge pump is automatically opened, and the sludge pump is started to discharge sludge; at this time, according to the online liquid level feedback, When the liquid level in the high-efficiency sedimentation tank drops by 20cm, the sludge pump is turned off and the aeration pump is turned on. The aeration pump is connected to the aeration pipe below the inclined pipe in the high-efficiency sedimentation tank, and the inclined pipe is backwashed by aeration for 30 minutes. After the backwashing is completed, it is allowed to settle for 10 minutes. When the settling meets the time setting conditions, the sludge pump is turned on again to discharge all the bottom sludge in the sedimentation tank (online mud level meter) to increase the sedimentation volume. After the sludge is discharged, the sludge pump is turned off, and the inlet and outlet gates of the high-efficiency sedimentation tank are automatically opened, and the system resumes operation. Through two sludge discharge procedures and lowering the liquid level in the tank, the influence of the existing sludge amount on the settling effect is minimized, the backwashing time is shortened, and the process operation is restored in the shortest time.

[0084] The automatic mud filling system of the sludge homogenization tank includes mud filling with upper and lower limits of mud level control and gate switch in place detection; the analysis and control system includes production intelligent analysis, power management platform and chemical cost management analysis. The production intelligent analysis includes inlet water quality analysis, effluent water quality analysis and biological treatment series parameter analysis. The power management platform includes power supply source, power consumption distribution, power consumption period and time period electricity price; the chemical cost management analysis includes chemical cost statistics, chemical surplus statistics, cycle water volume comparison and cycle ton water cost comparison; through analysis and control, the production process is timely regulated and the production cost is managed.

[0085] The early warning and abnormal handling system includes a fault early warning system and abnormal handling analysis. The fault early warning system includes a process operation early warning system, an equipment fault early warning system, a reagent inventory and flow early warning system, and a sludge treatment and disposal system; the process operation early warning system includes an alarm for the inlet level exceeding the set range, an alarm for the activated sludge return ratio, an alarm for the water quality index exceeding the set limit, and an alarm for the process parameter exceeding the set limit; the equipment fault early warning system includes an alarm for the operating temperature exceeding the limit, an alarm for the operating pressure exceeding the limit, an alarm for the operating timeout, and an alarm for the start-up and shutdown timeout; early warning for reagent inventory and flow The system includes alarms for when the inventory in the reagent storage tank is lower than the safe value, alarms for when the dosing flow exceeds the limit, and remote automatic control timeout reset; the sludge treatment and disposal early warning system includes alarms for when the liquid level in the homogenization tank exceeds the set range, alarms for when the single pump sludge treatment flow exceeds the set range, and alarms for when the storage capacity in the transfer silo exceeds the set range; abnormal disposal analysis includes phosphate abnormalities, nitrate nitrogen abnormalities, and equipment status abnormalities. Phosphate abnormalities are linked to precise dosing and phosphorus removal agents, and nitrate nitrogen abnormalities are linked to in-situ precise denitrification. Equipment status abnormalities are reported as online work orders, maintenance content is recorded, and subsequent acceptance is carried out.

[0086] The present invention achieves energy saving in multiple links through precise automatic control; for example, the constant flow control of the water inlet pump room reduces the energy waste caused by frequent adjustment; the coarse and fine grids operate intelligently intermittently according to the water inlet flow, reducing the energy consumption of the equipment at low load; the displacement-speed rapid aeration system avoids excessive aeration and reduces the energy consumption of the blower; the sludge automatic filtering device can reduce equipment wear and improve the operating efficiency of the sludge treatment back-end equipment, etc. Comprehensively estimated, the energy consumption of the sewage treatment plant can be reduced by about 2%.

[0087] In addition, the intelligent dosing system and the automatic weighing management system for reagents are linked to strengthen the management of reagent use, and accurately add reagents according to real-time flow and water quality indicators to avoid excessive use of reagents. Taking carbon sources and phosphorus removal reagents as examples, it can reduce reagent waste by about 2%, significantly reducing the cost of reagent procurement.

[0088] The extensive application of automation and informatization in the system of the present invention reduces the reliance on manual operation, reduces labor intensity and operation complexity, improves employee work efficiency, and further saves labor cost expenditure.

[0089] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A sewage treatment full-process operation and control system, characterized in that: Including security and environmental management systems, perception and monitoring systems, and operation and control systems; The security and environmental management system includes a security access control system, a living area security system and a patrol inspection system; The sensing and monitoring system includes water quality monitoring, water quantity monitoring, process parameter monitoring and equipment status monitoring; The operation and control system includes multi-mode intelligent control of the water inlet pump station, grille operation system, aeration sand settling tank automatic control system, biological pool in-situ precise denitrification, precise dosing system, automatic discharge accounting of residual sludge, displacement-speed rapid aeration system, sludge homogenization tank automatic mud filling system, efficient sedimentation tank automatic control system, analysis and control system, and early warning and abnormal handling system; The grid operation system predicts the water volume in another period of time after time t by counting the water volume in a period of time before time t; The predicted water volume is used to calculate the actual time the grille needs to run at the designed flow rate, and the actual time is used to realize the automatic start, stop and switch of the grille; The displacement-speed rapid aeration system includes displacement-speed cascade PID control and predictive pre-feedback regulation; displacement-speed cascade PID control is performed through dissolved oxygen changes and aeration air volume regulation; the predicted dissolved oxygen value after a period of time is predicted by monitoring the change value of dissolved oxygen in a certain period of time, and the difference between the predicted dissolved oxygen value and the target value is used as the regulation negative feedback value, and the aeration air volume is adjusted through displacement-speed cascade PID control; The high-efficiency sedimentation tank automatic control system includes an automatic backwashing system and an automatic mud discharge system, and is linked with a precise dosing system; the precise dosing system and the automatic backwashing system are used to ensure the effluent quality, and the automatic mud discharge system is used to discharge mud, thereby improving the backwashing efficiency.

2. A sewage treatment full-process operation and control system according to claim 1, characterized in that: The security access control system includes a fully automatic weight calculation platform, a white list of employee vehicles, and an external vehicle approval system; the fully automatic weight calculation platform is used for sludge transportation and pharmaceutical weighing; the white list of employee vehicles includes official vehicles and employee vehicles; The living area security system includes employee face recognition and floor monitoring system; employee face recognition is used to set access permissions; the floor monitoring system is used for personnel tracking and emergency assistance alarm; The inspection system includes a remote monitoring system and an operation and maintenance inspection system; the remote monitoring system is used for online monitoring of process points and key parts, and the operation and maintenance inspection system is used for safety inspection of recycled water and substations.

3. A sewage treatment full-process operation and control system according to claim 1, characterized in that: The water quality monitoring includes inlet water quality monitoring, outlet water quality monitoring and process water quality monitoring; The water volume monitoring includes the water volume monitoring of the day, the water volume monitoring of the previous day, the water volume of biological treatment, the water flow monitoring and the recycled water usage; The process parameter monitoring includes detection of activated sludge concentration, dissolved oxygen concentration in biological treatment, recirculation ratio in biochemical treatment, oxygen supply ratio - linking water inlet, key structure liquid level monitoring, redox potential monitoring and intelligent microbial phase observation; The equipment status monitoring includes lifting equipment, oxygen supply equipment, filtering equipment, deodorizing equipment, sludge equipment, various valves and gates, and flow state adjustment equipment.

4. A sewage treatment full-process operation and control system according to claim 1, characterized in that: The grille operation system reads the cumulative water inflow X in the T period before time t0 j , and the X j Based on the design flow rate X, the actual operation time t1 of the grid needs to be operated in a specific time period t in the future is calculated; where T = nt, t1 = X j / (nX); where n≥1; Compare t1 with t to determine the automatic start and stop of the grille and the automatic switching between them.

5. A sewage treatment full-process operation and control system according to claim 1, characterized in that: In the displacement-speed rapid aeration system, the average value DO1 of the dissolved oxygen change in the current period S1 and the average value DO2 of the dissolved oxygen change in the previous period S1′ are read, where S1=S1′, and the time interval between S1 and S1′ is △S, and the dissolved oxygen change rate DO at the current moment is obtained. v =(DO1-DO2) / △S, and predict the predicted value of dissolved oxygen DO at time k after a long period of time S 预测 =DO1+S / △S*(DO1-DO2), and set the target value of dissolved oxygen DO at time k 目标 ; DO 目标 With DO 预测 The difference between the target dissolved oxygen change rate at time k is used as the negative feedback value, and the target dissolved oxygen change rate at time k is calculated through the displacement loop PID; the difference between the target dissolved oxygen change rate at time k and the dissolved oxygen change rate at the current moment is used as the negative feedback value, and the change amount of the control element is calculated through the speed loop PID to realize the adjustment of the blower opening.

6. A sewage treatment full-process operation and control system according to claim 1, characterized in that: The operation of the efficient sedimentation tank automatic control system comprises the following steps: S1. Install online liquid level monitoring instruments and online mud level monitoring instruments in the high-efficiency sedimentation tank, set up online turbidity monitoring instruments on the outlet side of the high-efficiency sedimentation tank, and set up online orthophosphate monitoring instruments on the inlet side; S2. When it is detected that the orthophosphate on the inlet side reaches the set upper limit, the precise dosing system is started and the dephosphorization agent is added through the precise dosing system; S3. When the effluent turbidity is detected to reach the upper limit, the backwash control system and the automatic mud discharge system are started.

7. A sewage treatment full-process operation and control system according to claim 6, characterized in that: In the above-mentioned S3, the inlet gate and outlet gate of the high-efficiency sedimentation tank are first closed. When the gates are closed, the sludge pump is started and the first sludge discharge operation is performed. After the first sludge discharge is completed, the aeration pump is turned on to backwash the inclined pipe by aeration. After the backwashing is completed, it is settled quietly, and then the sludge pump is turned on again to perform the second sludge discharge operation. After the second sludge discharge is completed, the sludge pump is turned off, the inlet and outlet gates of the high-efficiency sedimentation tank are opened, and the system resumes operation.

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