CN214167691U - Sewage treatment plant fine management system - Google Patents
Sewage treatment plant fine management system Download PDFInfo
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- CN214167691U CN214167691U CN202022082213.7U CN202022082213U CN214167691U CN 214167691 U CN214167691 U CN 214167691U CN 202022082213 U CN202022082213 U CN 202022082213U CN 214167691 U CN214167691 U CN 214167691U
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- sewage treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model provides a sewage treatment plant management system that becomes more meticulous, include: the water quality monitoring unit is connected with the sewage draining port, the data processor is in data connection with the water quality monitoring unit, the PLC control system is in data connection with the data processor, the PLC control system controls the drug adding pump set, and the drug is put into the sewage treatment device through the drug putting port. The utility model discloses a sewage treatment plant fine management system feeds back to data analysis equipment according to the monitoring value of inflow flow change, total phosphorus of intaking, total nitrogen, gives out the instruction through PLC and reaches the frequency conversion dosing pump and realize the adjustment of medicament dosage, realizes finally accurately adding medicine, guarantees that the play water quality of water discharges up to standard in real time; the optimized control of the dosage of the medicament is perfected, the energy conservation and the consumption reduction are realized, the use of personnel is reduced, and the automation, the informatization and the unattended operation are realized.
Description
Technical Field
The utility model relates to a sewage treatment especially relates to a sewage treatment plant fine management system with purifying technical field.
Background
Eutrophication of water bodies is a worldwide problem, and a great deal of research has proved that nitrogen and phosphorus in sewage are one of the main causes of eutrophication of receiving water bodies.
At present, the widely adopted biological nitrogen and phosphorus removal process of a sewage plant comprises the following steps: a. the2O, SBR, oxidation ditch, etc. The nitrogen and the phosphorus in the sewage can be removed by two methods, namely a chemical method and a biological method. Biological nitrogen and phosphorus removal is a relatively economical method, but sufficient carbon source is very important to achieve good biological nitrogen removal effect. It is generally considered that COD/TN>When 8, good denitrification effect can be achieved, and if the organic matter content of the raw water is not high, organic compounds are generally added, such as: methanol, propionic acid, sodium acetate, etc.; the biological phosphorus removal is realized by releasing phosphorus from phosphorus accumulating bacteria under an anaerobic condition, excessively taking up phosphorus under an aerobic condition and discharging residual sludge. Anaerobic conditions (in general `)>0<0.2mg/L), the phosphorus-accumulating bacteria releases phosphorus-accumulating in vivo, and easily degradable organic matters (mainly volatile fatty acid VFA) in the sewage are utilized to synthesize poly B-hydroxybutyrate (PHB) which is stored in vivo. Under aerobic conditions, the phosphorus accumulating bacteria oxidize PHB in the body, and utilize the energy generated by the reaction to excessively absorb phosphorus from water to synthesize an energy substance ATP, and the phosphorus not used for the synthesis reaction is stored in the body to form phosphorus accumulation. The aerobic phosphorus uptake is larger than the anaerobic phosphorus release, and phosphorus can be removed by discharging sludge.
Because the existing biological nitrogen and phosphorus removal process can not ensure that the total nitrogen and the total phosphorus of effluent stably meet the requirements of national or local standards, chemical agents are often adopted or assisted to remove nitrogen and phosphorus. On the premise of ensuring the quality of the discharged water, in order to realize the automatic regulation of the dosing quantity along with the quality and quantity of the inlet water and save the dosing cost, an intelligent dosing system becomes the direction continuously explored by water treatment researchers.
In the prior art, the automatic dosing system is provided with detection instruments at the treated water outlets respectively, the dosing of the medicament through the effluent quality has hysteresis, the dosing of the medicament is delayed when the effluent quality exceeds the standard, the time is too late, a certain reaction time is needed after the dosing of the medicament, and the timeliness that the effluent quality is qualified after reaching the standard is increased. And when the fluctuation of the incoming water is large and is impacted by the water quantity, the prior art can not meet the requirement of the dosage of the medicament.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a sewage treatment plant fine management system who guarantees the real-time discharge to reach standard of play water quality and perfect the optimal control of medicament volume of throwing in is provided to prior art not enough.
The utility model discloses the technical problem that solve is realized through following technical scheme:
a sewage treatment plant refinement management system comprises: the device comprises a water quality monitoring unit connected with a sewage inlet, a data processor in data connection with the water quality monitoring unit, and a PLC control system in data connection with the data processor, wherein the PLC control system controls a drug adding pump set and puts drugs into the sewage treatment device through a drug putting port.
Preferably, the water quality monitoring unit includes: total phosphorus monitoring facilities, total nitrogen monitoring facilities and water flow monitoring facilities.
Preferably, the drug-pump unit comprises: a carbon source dosing pump and a phosphorus removal medicament dosing pump.
Preferably, a medicament feeding port corresponding to the carbon source dosing pump is connected with an anoxic zone in the sewage treatment device.
Preferably, a medicament feeding port corresponding to the phosphorus removal medicament feeding pump is connected with an aerobic zone in the sewage treatment device.
Preferably, each dosing pump in the dosing pump sets is a variable frequency dosing pump.
The utility model discloses a sewage treatment plant fine management system feeds back to data analysis equipment according to the monitoring value of inflow flow change, total phosphorus of intaking, total nitrogen, gives out the instruction through PLC and reaches the frequency conversion dosing pump and realize the adjustment of medicament dosage, realizes finally accurately adding medicine, guarantees that the play water quality of water discharges up to standard in real time; the optimized control of the dosage of the medicament is perfected, the energy conservation and the consumption reduction are realized, the use of personnel is reduced, and the automation, the informatization and the unattended operation are realized.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic structural view of a refined management system of a sewage treatment plant of the utility model;
FIG. 2 is the utility model discloses PID control schematic diagram among the sewage treatment plant management system that becomes more meticulous.
Detailed Description
Fig. 1 is the utility model discloses sewage treatment plant management system structure sketch map that becomes more meticulous. As shown in FIG. 1, the utility model discloses a sewage treatment plant fine management system, include: the water quality monitoring unit 2 is connected with the sewage inlet 1, the water quality monitoring unit 2 is respectively in data connection with the data processor 3 and the PID controller 7, the PLC control system 4 is in data connection with the data processor 3, the PLC control system controls the drug adding pump set 6, and drugs are put into the sewage treatment device 5 through the drug putting port. The PID controller 7 is used for controlling the time interval of the water quality monitoring unit for extracting the water sample.
Wherein, water quality monitoring unit 2 includes: total phosphorus monitoring facilities, total nitrogen monitoring facilities and water flow monitoring facilities. Each dosing pump in the dosing pump unit 6 is a variable frequency dosing pump, and comprises: a carbon source dosing pump 61 and a phosphorus removal agent dosing pump 62; the carbon source feeding port 611 corresponding to the carbon source dosing pump 61 is connected with the anoxic zone in the sewage treatment device 5, and the phosphorus removal agent feeding port 621 corresponding to the phosphorus removal agent dosing pump 62 is connected with the aerobic zone in the sewage treatment device 5.
FIG. 2 is the utility model discloses PID control schematic diagram among the sewage treatment plant management system that becomes more meticulous. As shown in fig. 2 and with reference to fig. 1, the fine management system of the sewage treatment plant in the embodiment works according to the following principle: collected sewage passes through a water quality monitoring unit 2, wherein the water quality monitoring unit 2 comprises total phosphorus monitoring equipment, total nitrogen monitoring equipment and water flow monitoring equipment, the monitoring equipment sends the data of phosphorus content, nitrogen content and water flow in the sewage to a data processing unit 3, related data such as water quantity, water quality, dosing amount and removal rate of a biological nitrogen and phosphorus removal system of hundreds of sewage treatment plants in the whole country are recorded in the data processing unit 3, the on-site inflow water flow, inflow total nitrogen and total phosphorus water quality states are monitored, process parameters are collected and stored in real time, water quality data conditions are analyzed, a proper dosing proportion is calculated, and a PLC (programmable logic controller) controller is used for controlling the operation of a variable frequency dosing pump to respectively dose chemicals to an anoxic zone and an aerobic zone.
Description of the calculation:
1. when the water quality monitoring equipment detects out total nitrogen and phosphorus data:
the method comprises the steps of firstly, obtaining total nitrogen and total phosphorus to be removed according to data detected by water inlet total nitrogen and total phosphorus water quality monitoring equipment and effluent water quality indexes, analyzing the total nitrogen and total phosphorus amount capable of being processed by a biochemical processing unit of a factory (obtaining the total nitrogen and total phosphorus removal rate of the biochemical processing unit of the factory through sewage treatment plants with the same process of all factories in China and storing data in the equipment) through a data processor, obtaining the total nitrogen and phosphorus amount to be removed by chemical agents, and finally feeding back the amount of the agents to be added.
The principle of chemical phosphorus removal:
the chemical phosphorus removal is to utilize inorganic metal salt as a precipitator to react with phosphate substances in the sewage to form insoluble phosphorus-containing compounds and flocculating constituents, and to separate out soluble phosphate in the sewage. The chemical phosphorus removal agents mainly comprise iron salt, aluminum salt and lime, and the lime has a large influence on the pH value of biological treatment, so that the problem of pipeline blockage is easily caused, a lot of troubles are brought to operation management, and the chemical phosphorus removal agents are rarely adopted in sewage treatment plants mainly using biological phosphorus removal and assisted by chemical phosphorus removal. At present, iron salt or aluminum salt is commonly used as a precipitator in China, and the chemical reaction formula of the iron salt or the aluminum salt with phosphorus is as follows (1) and (2):
Al3++PO4 3-→Al PO4↓ (1)
Fe3++PO4 3-→Fe PO4↓ (2)
the reaction formula of the metal ion and OH-competing with the precipitation reaction is as follows (3), (4):
Al3++3OH-→Al(OH)3↓ (3)
Fe3++3OH-→Fe(OH)3↓ (4)
the metal hydroxide forms large flocks which are powerful for flocculation of the precipitated product and also adsorb colloidal substances, finely suspended particles.
Calculating the dosage of the phosphorus removal medicament:
as is clear from the formulae (1) and (2), 1mol of iron ions or aluminum ions are required for removing 1mol of phosphate. In practical engineering, the reaction is not 100% effective, and OH-participates in competitive reaction and reacts with metal ions to generate corresponding hydroxides, such as the formulas (3) and (4), so that in practice, chemical precipitation agents generally need to be added in excess to ensure that the required effluent P concentration is achieved. In the fifth volume of the handbook of design of water supply and drainage and in the german design specification, it is mentioned that simultaneous precipitation chemical phosphorus removal can be considered according to 1.5mol of aluminum salt or iron salt needed for 1mol of phosphorus, and for the sake of convenience of calculation, the moles are actually converted into mass units, such as 1molFe ═ 56gFe, 1molAl ═ 27gAl, 1molP ═ 31gP, that is, 1kg of phosphorus is removed, and when iron salt is used, the addition is needed: 1.5 × (56/31) ═ 1.5 × 1.8 ═ 2.7Kg Fe/KgP, and when aluminum salts are used they need to be dosed: 1.5 x (27/31) to 1.5 x 0.87 to 1.3Kg Al/KgP.
Adding medicine for feedback:
through the calculation, the dosage of the medicament to be added in the actual production is obtained, the medicament adding pump is controlled through the PLC control system, and the medicament adding pump is used for actually adding the medicament through the opening and closing degree of the frequency converter.
The calculation and implementation of nitrogen removal are consistent with the phosphorus removal process, please refer to the above phosphorus removal process.
2. Controlling the dosage according to the flow
Because the total nitrogen and phosphorus monitoring equipment for water inflow does not detect the water quality in real time and detects the water quality once every 2 hours, the micro adjustment needs to be adjusted through real-time flow change.
Because the flow meter monitors the flow in real time and feeds back the flow to the data processor through the change of the flow, the data processor calculates the total nitrogen and phosphorus through the flow by the big data stored inside; since the flow meter changes in real time, the changes are fast, and then the sampling time interval (which can be set) is controlled by adding a PID controller. According to a change of the flow within a period of time (10 minutes, 20 minutes, 30 minutes, etc.), the data processor analyzes the flow change to calculate the total nitrogen and phosphorus amount, and the remaining medicament adding mode and calculation are consistent with the phosphorus removal calculating method and process, which are referred to above and are not described herein again.
In addition, in order to reduce the equipment loss, a PID controller 7 is added, and the time interval of the extraction and monitoring of the sewage by the water quality monitoring unit 2 is controlled by the PID controller 7. In this embodiment, according to the operation rule of manual medicine feeding, the PID controller 7 firstly determines the sampling time interval to be 10 minutes by using a critical proportion method, dynamically optimizes the proportion coefficient, and finally adjusts the integral and differential coefficients.
PID controller description: the manual operation stage completely depends on the experience of an operator, the dosage is judged through experiments, and manual administration is carried out; in the simple automatic control stage, a computer and a programmable logic device are adopted, and manual adjustment is assisted to perform automatic dosing control; in the intelligent control stage, an advanced artificial intelligence technology is adopted to adaptively control the chemical feeding process according to the water quality change.
And the PID feedback control mode is used for controlling the dosing system, the controller compares an input detection value Yn with a given value Yr to obtain a deviation E, and the automatic control of the dosing quantity is carried out according to the deviation.
The intelligent control is a high-level stage of automatic control development, is a high integration of various disciplines such as artificial intelligence, control theory, system theory and information theory, and is a non-traditional mathematical formulation process which is based on knowledge information to learn and reason, uses a heuristic method to guide a solving process and generally has no known algorithm and contains complexity, uncertainty and ambiguity. It mainly includes neural network control, fuzzy control and expert control.
And (3) neural network control:
neural network control is a novel control and identification method that mechanistically performs simple structural simulation on the human brain. The neural network has self-adaptive capacity to complex uncertain problems, and can be used as a compensation link and a self-adaptive link of a control system; the describing capability of the neural network to any nonlinear relation can be used for identifying and controlling a nonlinear system; the fast optimization computing power of the neural network can be used for an optimization computing port of a complex control problem.
Fuzzy control:
fuzzy control is based on fuzzy mathematical knowledge that can represent the control experience and knowledge of an operator or expert as control rules described by language variables, which are then used to control the system. The method is particularly suitable for the control network of the complex nonlinear system with unknown mathematical model.
The utility model discloses a sewage treatment plant fine management system feeds back to data analysis equipment according to the monitoring value of inflow flow change, total phosphorus of intaking, total nitrogen, gives out the instruction through PLC and reaches the frequency conversion dosing pump and realize the adjustment of medicament dosage, realizes finally accurately adding medicine, guarantees that the play water quality of water discharges up to standard in real time; the optimized control of the dosage of the medicament is perfected, the energy conservation and the consumption reduction are realized, the use of personnel is reduced, and the automation, the informatization and the unattended operation are realized.
Claims (6)
1. A sewage treatment plant fine management system is characterized by comprising: the system comprises a water quality monitoring unit connected with a sewage inlet, a data processor in data connection with the water quality monitoring unit, and a PLC control system in data connection with the data processor, wherein the PLC control system controls a drug adding pump set and puts drugs into a sewage treatment device through a drug putting port; the system also comprises a PID controller, wherein the PID controller is connected with the water quality monitoring unit and is used for controlling the time interval of the water quality monitoring unit for extracting the water sample.
2. The sewage treatment plant refinement management system according to claim 1, wherein the water quality monitoring unit comprises: total phosphorus monitoring facilities, total nitrogen monitoring facilities and water flow monitoring facilities.
3. The sewage treatment plant refinement management system according to claim 1, wherein the drug pump package comprises: a carbon source dosing pump and a phosphorus removal medicament dosing pump.
4. The sewage treatment plant refinement management system of claim 3, wherein a carbon source feeding port corresponding to the carbon source dosing pump is connected with an anoxic zone in the sewage treatment device.
5. The sewage treatment plant refinement management system of claim 3, wherein a dephosphorization agent feeding port corresponding to the dephosphorization agent dosing pump is connected with an aerobic zone in the sewage treatment device.
6. The sewage treatment plant fine management system of claim 1, wherein each dosing pump in the dosing pump groups is a variable frequency dosing pump.
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| CN202022082213.7U CN214167691U (en) | 2020-09-21 | 2020-09-21 | Sewage treatment plant fine management system |
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| CN202022082213.7U CN214167691U (en) | 2020-09-21 | 2020-09-21 | Sewage treatment plant fine management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116216807A (en) * | 2023-02-24 | 2023-06-06 | 青岛张村河水务有限公司 | Intelligent dosing system based on sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116216807A (en) * | 2023-02-24 | 2023-06-06 | 青岛张村河水务有限公司 | Intelligent dosing system based on sewage treatment |
| CN116216807B (en) * | 2023-02-24 | 2023-09-01 | 青岛张村河水务有限公司 | Intelligent Dosing System Based on Sewage Treatment |
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