CN105800755A - Water quality online monitoring system and method of wastewater coagulation treatment unit - Google Patents
Water quality online monitoring system and method of wastewater coagulation treatment unit Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
- G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a water quality online monitoring system of a wastewater coagulation treatment unit. The water quality online monitoring system comprises a sensor system, an execution operation system, a PLC control system and an MCGS configuration monitoring system, wherein the sensor system consists of a liquid medicine flowmeter, a liquid level sensor, a turbidity meter, a pH detector and a COD online detector; the sensor system transmits the analog quantity to the PLC control system; the execution operation system consists of a stirring apparatus, a metering pump, a centrifugal pump and a solenoid valve; the exaction operation system is connected with the PLC control system and executes the operation instructions output by the PLC control system; the MCGS configuration monitoring system comprises a visual interface unit, a data storage unit, an alarm function unit and a dosing program unit; and the MCGS configuration monitoring system is used for analyzing and processing the data transferred by the PLC control system and outputting control instructions to the PLC control system. In the invention, the coagulation process is monitored in real time so as to get the coagulation operation condition in time and realize automatic dosing for coagulation, automatic adjustment of water quality pH and the like.
Description
[technical field]
The present invention relates to coagulation monitoring technology on-line field, specifically a kind of coagulating waste water processing unit water quality on-line monitoring system and method.
[background technology]
MCGS (MonitorandControlGeneratedSystm) is the industrial configuration software that a domestic contrast is outstanding, provide the user and solved the complete scheme of Practical Project problem and development platform, it is possible to completed on-site data gathering, process with historical data, report to the police and security mechanism, Row control, animation show, trend curve and the function such as report output and enterprise supervision network in real time.This software uses simple, and performance is good workable, and programming language is simple, has abundant industrial equipment figure installation kit to provide designer to select, it is easy to accomplish the human-computer interaction interface of various close friends.MCGS software is possible not only to industrial process is emulated, and also has host computer function, it is possible to be connected with PLC, converter and sensor and factory technics process is carried out real-time monitoring and control.
Coagulation is a kind of common waste water treatment process, its principle is to add chemical agent in waste water to make colloidal solid thing surface characteristic change, make not free settling macromole and float by charge attraction, build bridge absorption or net is caught volume and the effect such as swept and converge sedimentation, then pass through isolated by filtration and the floccule body of sedimentation removed from waste water.At present, some plant effuents process coagulation process and appoint employing manual hand manipulation, and automaticity is low, whole technical process omnidistance cannot be understood ruuning situation, need multiple workman's on-site maintenance process operation, and adding medicine dosage often rule of thumb adds so that coagulation effect cannot ensure.
Application number be 201510410118.6 application for a patent for invention disclose a kind of water processing platform based on cloud computing, this platform includes cloud management center, and scene operational outfit, data real-time collecting system, PLC, data wireless transmissions systems, but flow charging pressed by this platform, sometimes beyond expense, and expense all compares high and cloud computing itself is also not overripened to a great extent, there is potential safety hazard, practical application is got up relatively difficult.
Application number be 200710121579.7 application for a patent for invention disclose a kind of automatic coagulation administration system, including controlling module, D/A switch module, detection module, memory module and dispensing module, but this systemic-function is relatively easy, such as, lack the feedback mechanism of each index, it is impossible to solve technological problems in time.
[summary of the invention]
Present invention aim to solve above-mentioned deficiency and a kind of coagulating waste water processing unit water quality on-line monitoring system is provided, for coagulation process monitor in real time being understood in time coagulation ruuning situation and realizing coagulation Automatic Dosing, be automatically adjusted the functions such as water quality pH.
A kind of coagulating waste water processing unit water quality on-line monitoring system of design for achieving the above object, including sensing system, perform operating system, PLC control system, MCGS configuration monitoring system, described sensing system is made up of medicinal liquid flow meter, liquid level sensor, transmissometer, pH detector, COD on-line detector, described sensing system is connected with PLC control system, and described sensing system transmits analog quantity to PLC control system；Described execution operating system is made up of mixing plant, dosing pump, centrifugal pump, electromagnetic valve；Described execution operating system is connected with PLC control system and performs the operational order of its output；Described MCGS configuration monitoring system includes visualization interface unit, data storage cell, warning function unit, dosing program unit, described MCGS configuration monitoring system is connected with PLC control system, described MCGS configuration monitoring system is used for analyzing and processing the data of PLC control system transmission, and exports control instruction to PLC control system.
Described dosing program unit is coagulation dosing data base, test data when described coagulation dosing data base have accumulated daily influent turbidity, CODcr correspondence coagulant, flocculant chemical feeding quantity data sheet and repeatedly debugs.
Described COD on-line detector, transmissometer are respectively intended to detection coagulation influent COD cr concentration, turbidity, and collection data are converted to analog quantity feed back to PLC control system, described PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again, after being calculated by data analysis, pass the result to PLC control system, control signal is passed to coagulant, flocculant dosing dosing pump by described PLC control system again, to adjust dosing pump operation time and medicament addition.
The coagulation water inlet pH value of detection is converted to analog quantity and feeds back to PLC control system by described pH detector, described PLC control system passes data to MCGS configuration monitoring system again, by to data analysis, result passes to PLC control system, control signal is passed to soda acid dosing dosing pump by described PLC control system again, until water quality pH reaches coagulation requirement.
Described data storage cell is used for recording each coagulation process data, and described data include time, influent turbidity, influent COD cr concentration, coagulant charging quantity, flocculant dosage, soda acid added amount of chemical and each coagulation water yield.
Described warning function unit is blown a whistle for warning, to remind staff's coagulation process operation exception, described coagulation process operation exception includes acid-alkali accommodation pond, coagulating basin level value exceedes setting value, when during dosing pump running, correspondence effusion meter flow is 0, sensor transmissions data fluctuations scope is abnormal, and device therefor electrical voltage is unstable.
The on-line monitoring method of any of the above-described kind of coagulating waste water processing unit water quality on-line monitoring system, comprise the following steps: when after monitoring system start-up, described sensing system transmits analog quantity to PLC control system, described PLC control system passes data to MCGS configuration monitoring system, described MCGS configuration monitoring system is to after Data Analysis Services, pass the result to PLC control system, control instruction is passed to execution operating system by described PLC control system again, to judge whether the execution mixing plant of operating system, dosing pump, centrifugal pump, electromagnetic valve start.
As preferably, this on-line monitoring method includes step in detail below:
1) when after monitoring system start-up, whether the liquid level sensor detection acid-alkali accommodation pond water yield is sufficient, if water shortage, waste water is squeezed into acid-alkali accommodation pond by centrifugal pump, liquid level sensor detection liquid level, and testing result is converted to analog quantity feeds back to PLC control system, PLC control system passes data to MCGS configuration monitoring system, MCGS configuration monitoring system passes through Data Analysis Services, then sends the signal to PLC control system, PLC control system implement to start or stop；
2) after waste water enters acid-alkali accommodation pond, the pH value of detection is converted to analog quantity and feeds back to PLC control system by pH detector, PLC control system passes data to MCGS configuration monitoring system, by to data analysis, passing the result to PLC control system, control signal is passed to soda acid dosing pump by PLC control system again, when soda acid measures pump startup, the mixing plant in acid-alkali accommodation pond also begins to start stirring water quality, when water quality soda acid reaches reasonable request, stops dosing and stirring；
null3) after acid-alkali accommodation pond water quality Acidity of Aikalinity regulates，COD on-line detector、Transmissometer gathers coagulating basin influent COD cr concentration respectively、Turbidity，And testing result is converted to analog quantity feeds back to PLC control system，PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again，Calculated by data analysis，Result passes to PLC control system，Control signal is passed to coagulant by PLC control system again、Flocculant dosing dosing pump，Adjust dosing pump and run time and medicament addition，Start coagulating basin mixing plant simultaneously，After the coagulation time reaches the setting time，Stop stirring，After static certain time，Open the coagulation outlet of coagulating basin，When the liquid level sensor of coagulating basin detects and drops to certain distance，Close coagulation outlet，Open coagulating sedimentation outlet，Discharge coagulating sedimentation.
The present invention compared with the existing technology, has the advantage that
(1) whole coagulation process process being adopted monitoring, automaticity is high, it is possible to understand process operation situation in time, without execute-in-place, directly manipulates flow process in monitoring interface；
(2) the warning function unit of MCGS configuration monitoring system and alarm when coagulation process exception, contributing to staff's very first time checks technique and keeps in repair, it is to avoid more major break down occurs；
(3) each coagulation process data of the data storage cell record of MCGS configuration monitoring system, contribute to grasping coagulation process day-to-day operation situation, and automatically generate and add survival dose form, it is simple to the daily management to technique；
(4) PLC control system is passed to by influent turbidity, CODcr concentration as feedback signal, PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again, coagulant, flocculant chemical feeding quantity is calculated by coagulation dosing data base, realize Automatic Dosing process, improve chemical feeding quantity accuracy, it is ensured that coagulation effect；
(5) monitoring system is simple and practical, easy for installation, need not significantly alter for coagulation process, so that it may realize on-line monitoring；
(6) manipulating either directly through MCGS monitoring interface without execute-in-place, and can understand process operation situation at any time, technology maturation is less costly, has Automatic Dosing simultaneously, is automatically adjusted the functions such as water quality pH.
[accompanying drawing explanation]
Fig. 1 is the system architecture diagram of the present invention；
Fig. 2 is the coagulation process monitoring flow chart of the present invention；
In figure: 1, acid-alkali accommodation pond 2, coagulating basin 3, pH detector 4, liquid level sensor 5, transmissometer 6, COD on-line detector 7, NaOH storage tank 8, HCL storage tank 9, centrifugal pump 1, centrifugal pump 2 11, dosing pump 1, dosing pump 2 13, dosing pump 3 14, dosing pump 4 15, electromagnetic valve 1, electromagnetic valve 2 17, electromagnetic valve 3 18, electromagnetic valve 4 19, valve 1, valve 2 21, valve 3 22, valve 4 23, PAM storage tank 24, PAC storage tank 25, effusion meter 1, effusion meter 2 27, effusion meter 3 28, effusion meter 4 29, effusion meter five.
[detailed description of the invention]
The present invention is made further explained below below in conjunction with accompanying drawing:
As shown in Figure 1, structured flowchart for a kind of coagulation online monitoring system provided by the invention, known by accompanying drawing 1, this coagulation online monitoring system includes sensing system, performs operating system, PLC control system, MCGS configuration monitoring system, it is characterized in that: described sensing system is made up of medicinal liquid flow meter, liquid level sensor, transmissometer, pH detector, COD on-line detector, it is connected with PLC control system, transmits analog quantity to PLC control system；Perform operating system to be made up of mixing plant, dosing pump, centrifugal pump, electromagnetic valve, be connected the operational order performing its output with PLC；Described MCGS configuration monitoring system includes visualization interface unit, data storage cell, warning function unit, dosing program unit, and be connected with PLC control system, it is used for analyzing and processing the data of PLC control system transmission, and exports control instruction to PLC control system.
Wherein, dosing program unit refers to coagulation dosing data base, and this data base have accumulated daily influent turbidity, CODcr correspondence coagulant, flocculant chemical feeding quantity data sheet and test data when repeatedly debugging.COD on-line detector, transmissometer are respectively intended to detection coagulation influent COD cr concentration, turbidity, and collection data are converted to analog quantity feed back to PLC control system, PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again, calculated by data analysis, result passes to PLC control system, control signal is passed to coagulant, flocculant dosing dosing pump by PLC control system again, adjusts dosing pump and runs time and medicament addition.The coagulation water inlet pH value of detection is converted to analog quantity and feeds back to PLC control system by pH on-line detector, PLC control system passes data to MCGS configuration monitoring system again, by to data analysis, result passes to PLC control system, control signal is passed to soda acid dosing dosing pump by PLC control system again, until water quality pH reaches coagulation requirement.Data storage cell is used for recording each coagulation process data, including time, influent turbidity, influent COD cr concentration, coagulant charging quantity, flocculant dosage, soda acid added amount of chemical and each coagulation water yield.Warning function unit be used to warning blow a whistle prompting staff's coagulation process operation exception, described coagulation process operation exception includes: when acid-alkali accommodation pond, coagulating basin level value exceed setting value；When during dosing pump running, correspondence effusion meter flow is 0；Sensor transmissions data fluctuations scope is abnormal；Device therefor electrical voltage is unstable.
As shown in Figure 2, coagulation process for a kind of coagulation on-line monitoring method provided by the invention monitors flow chart, during monitoring system start-up, MCGS configuration monitoring system issues a command to PLC control system, instruction is issued sensing system by PLC control system, technological process is carried out data acquisition, and data result is passed to MCGS configuration monitoring system judges whether mixing plant, dosing pump, centrifugal pump, electromagnetic valve start.Below for a coagulation process, monitoring system flow is described:
When after monitoring system start-up, ultrasonic level gage detects regulating reservoir water shortage, centrifugal pump works at the beginning and waste water is squeezed into acid-alkali accommodation pond, ultrasonic level gage detection liquid level, and testing result is converted to analog quantity feeds back to PLC control system, PLC control system passes data to MCGS configuration monitoring system, and MCGS configuration monitoring system is by Data Analysis Services, send the signal to PLC control system again, PLC control system implement to start or stop；
After waste water enters regulating reservoir, the pH value of detection is converted to analog quantity and feeds back to PLC control system by pH on-line detector, PLC control system passes data to MCGS configuration monitoring system, by to data analysis, passing the result to PLC control system, control signal is passed to soda acid dosing pump by PLC control system again, when soda acid measures pump startup, acid-alkali accommodation pond agitator also begins to start stirring water quality, when water quality soda acid reaches reasonable request, stops dosing and stirring；
nullAcid-alkali accommodation pond water quality Acidity of Aikalinity regulates rear COD on-line detector、Transmissometer gathers coagulating basin influent COD cr concentration respectively、Turbidity，And testing result is converted to analog quantity feeds back to PLC control system，PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again，Calculated by data analysis，Result passes to PLC control system，Control signal is passed to coagulant by PLC control system again、Flocculant dosing dosing pump，Adjust dosing pump and run time and medicament addition，Start coagulation simultaneously and eat agitating device after the coagulation time reaches the setting time，Agitator stops stirring，After static certain time，Coagulation water outlet opened by electromagnetic valve three，When ultrasonic level gage detection drops to certain distance，Electromagnetic valve three cuts out，Electromagnetic valve four is opened and is started to discharge coagulating sedimentation.One coagulation monitoring flow process terminates.
The present invention by the change made under the restriction of above-mentioned embodiment, other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification, all not should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (8)
1. a coagulating waste water processing unit water quality on-line monitoring system, including sensing system, perform operating system, PLC control system, MCGS configuration monitoring system, it is characterized in that: described sensing system is made up of medicinal liquid flow meter, liquid level sensor, transmissometer, pH detector, COD on-line detector, described sensing system is connected with PLC control system, and described sensing system transmits analog quantity to PLC control system；Described execution operating system is made up of mixing plant, dosing pump, centrifugal pump, electromagnetic valve；Described execution operating system is connected with PLC control system and performs the operational order of its output；Described MCGS configuration monitoring system includes visualization interface unit, data storage cell, warning function unit, dosing program unit, described MCGS configuration monitoring system is connected with PLC control system, described MCGS configuration monitoring system is used for analyzing and processing the data of PLC control system transmission, and exports control instruction to PLC control system.
2. coagulating waste water processing unit water quality on-line monitoring system as claimed in claim 1, it is characterized in that: described dosing program unit is coagulation dosing data base, test data when described coagulation dosing data base have accumulated daily influent turbidity, CODcr correspondence coagulant, flocculant chemical feeding quantity data sheet and repeatedly debugs.
3. coagulating waste water processing unit water quality on-line monitoring system as claimed in claim 1, it is characterized in that: described COD on-line detector, transmissometer is respectively intended to detection coagulation influent COD cr concentration, turbidity, and collection data are converted to analog quantity feed back to PLC control system, described PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again, after being calculated by data analysis, pass the result to PLC control system, control signal is passed to coagulant by described PLC control system again, flocculant dosing dosing pump, to adjust dosing pump operation time and medicament addition.
4. coagulating waste water processing unit water quality on-line monitoring system as claimed in claim 1, it is characterized in that: the coagulation water inlet pH value of detection is converted to analog quantity and feeds back to PLC control system by described pH detector, described PLC control system passes data to MCGS configuration monitoring system again, by to data analysis, result passes to PLC control system, control signal is passed to soda acid dosing dosing pump by described PLC control system again, until water quality pH reaches coagulation requirement.
5. coagulating waste water processing unit water quality on-line monitoring system as claimed in claim 1, it is characterized in that: described data storage cell is used for recording each coagulation process data, described data include time, influent turbidity, influent COD cr concentration, coagulant charging quantity, flocculant dosage, soda acid added amount of chemical and each coagulation water yield.
6. coagulating waste water processing unit water quality on-line monitoring system as claimed in claim 1, it is characterized in that: described warning function unit is blown a whistle for warning, to remind staff's coagulation process operation exception, described coagulation process operation exception includes acid-alkali accommodation pond, coagulating basin level value exceedes setting value, when during dosing pump running, correspondence effusion meter flow is 0, sensor transmissions data fluctuations scope is abnormal, and device therefor electrical voltage is unstable.
7. the on-line monitoring method of the coagulating waste water processing unit water quality on-line monitoring system as according to any one of claim 1 to 6, it is characterized in that, comprise the following steps: when after monitoring system start-up, described sensing system transmits analog quantity to PLC control system, described PLC control system passes data to MCGS configuration monitoring system, described MCGS configuration monitoring system is to after Data Analysis Services, pass the result to PLC control system, control instruction is passed to execution operating system by described PLC control system again, to judge the mixing plant performing operating system, dosing pump, centrifugal pump, whether electromagnetic valve starts.
8. on-line monitoring method as claimed in claim 7, it is characterised in that comprise the following steps:
1) when after monitoring system start-up, whether the liquid level sensor detection acid-alkali accommodation pond water yield is sufficient, if water shortage, waste water is squeezed into acid-alkali accommodation pond by centrifugal pump, liquid level sensor detection liquid level, and testing result is converted to analog quantity feeds back to PLC control system, PLC control system passes data to MCGS configuration monitoring system, MCGS configuration monitoring system passes through Data Analysis Services, then sends the signal to PLC control system, PLC control system implement to start or stop；
2) after waste water enters acid-alkali accommodation pond, the pH value of detection is converted to analog quantity and feeds back to PLC control system by pH detector, PLC control system passes data to MCGS configuration monitoring system, by to data analysis, passing the result to PLC control system, control signal is passed to soda acid dosing pump by PLC control system again, when soda acid measures pump startup, the mixing plant in acid-alkali accommodation pond also begins to start stirring water quality, when water quality soda acid reaches reasonable request, stops dosing and stirring；
null3) after acid-alkali accommodation pond water quality Acidity of Aikalinity regulates，COD on-line detector、Transmissometer gathers coagulating basin influent COD cr concentration respectively、Turbidity，And testing result is converted to analog quantity feeds back to PLC control system，PLC control system passes data to the dosing program unit of MCGS configuration monitoring system again，Calculated by data analysis，Result passes to PLC control system，Control signal is passed to coagulant by PLC control system again、Flocculant dosing dosing pump，Adjust dosing pump and run time and medicament addition，Start coagulating basin mixing plant simultaneously，After the coagulation time reaches the setting time，Stop stirring，After static certain time，Open the coagulation outlet of coagulating basin，When the liquid level sensor of coagulating basin detects and drops to certain distance，Close coagulation outlet，Open coagulating sedimentation outlet，Discharge coagulating sedimentation.
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