CN101717143A - Method for controlling automatic flocculant addition - Google Patents
Method for controlling automatic flocculant addition Download PDFInfo
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- CN101717143A CN101717143A CN200910234341A CN200910234341A CN101717143A CN 101717143 A CN101717143 A CN 101717143A CN 200910234341 A CN200910234341 A CN 200910234341A CN 200910234341 A CN200910234341 A CN 200910234341A CN 101717143 A CN101717143 A CN 101717143A
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Abstract
The invention discloses a method for controlling automatic flocculant addition, which belongs to the field of sewage treatment. A feedback control system determines the flow of sewage and the concentration of TP and SS after sewage treatment and feeds back determination results to a PLC control system; and the PLC control system performs calculation by using undetermined parameters through a formula as follows: delta X dosage=k*Q*L*(P-1.1A)a*(S-1.05B)b/(lambda*N)according to the feedback of the feedback control system of the flow, the TP and the SS to indirectly determine the dosage of flocculant. The invention can regulate the dosage of the flocculant in time according to the coagulation effect of the sewage treatment and ensure the optimal dosage of the flocculant and the effect of the sewage treatment.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, especially for micro flocculating filter or the filtering Automatic Dosing control method of coagulating sedimentation.
Background technology
At present, the whole world all is faced with the problem of shortage of water resources, and as limited resources, the regeneration of water is that advanced treatment of wastewater becomes unique approach of dealing with problems.
Research and development are economical, sewerage advanced treatment process improves water surrounding for subduing the total amount of pollutant efficiently, build good water surrounding and improve people's quality of life, have urgent realistic meaning.Advanced treatment generally adopts micro flocculating filter or coagulating sedimentation filtration process etc., further remove the principal pollutant of secondary effluent, and the flocculation agent that adds is the main running cost of micro flocculating filter or coagulating sedimentation filtration process, existing dosing system is just determined the dosage of flocculation agent according to flooding velocity and turbidity, yet adding flocculation agent filters except removing turbidity, also total phosphorus (TP) and suspended solid (SS) had good effect of removing, and TP and SS be in the Sewage Plant secondary effluent integrated wastewater discharge standard primary standard A standard can not be up to standard most important index, and it is very unstable, add the very few water outlet of flocculation agent like this and can not reach standard, flocculant concentration is excessive not only can be wasted, and can produce a large amount of mud.Therefore the automatic medicament feeding system of setting up based on TP, SS and water yield variation has important practical significance.
In addition, along with developing rapidly of society, sewage work popularizes gradually and uses the on-line monitoring instrument to replace manually detecting the water outlet leading indicator, and the on-line monitoring instrument of the costliness of Gou Maiing is not considered to be used for other purposes just as just on-line monitoring system like this.
Summary of the invention
The object of the present invention is to provide in a kind of realization advanced treatment of wastewater treating processes, the Automatic Dosing control device that the flocculation agent of micro flocculating filter or coagulating sedimentation filtration process adds accurately automatically, and this device can make full use of sewage work's conventional online monitor, has so just deducted the prime cost of Automatic Dosing control device.
The present invention adopts following technical scheme for achieving the above object:
A kind of method for controlling automatic flocculant addition, first step are the installations of automatic flocculant addition Controlling System: described Controlling System comprises feedback control system, PLC Controlling System, volume pump, mixing tank and filtering basin; Feedback control system by the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, the online SS determinator that is used for measuring the sewage solid suspension content is formed; Feedback control system is arranged at the sewage equipped at outlet port, wherein the input terminus of flow instrument, online TP monitor, online SS determinator is connected with the input terminus of sewage delivery port, mixing tank respectively, the output terminal of flow instrument, online TP monitor, online SS determinator is connected with the input terminus of PLC Controlling System respectively, and the output terminal of PLC Controlling System connects volume pump, mixing tank, filtering basin successively; It is characterized in that: automatic flocculant addition comprises the steps:
A, utilize flow instrument to measure the discharge of sewage;
B, utilize the content of total phosphorus in the online TP analysis-e/or determining sewage;
C, utilize online SS determinator to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PLC Controlling System, the PLC Controlling System calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculation agent in the mixing tank according to this dosage;
E, mixing tank are rendered to flocculation agent in the sewage, then mixed water are outputed to filtering basin.
Wherein among the step D calculating of flocculant dosage according to formula Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) determine; In the formula,
K: correction factor, 0.5≤K≤1.5;
Q: the instantaneous delivery of actual flooding velocity meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the suspended solid that online SS determinator is measured;
A: the total phosphorous standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup specific gravity value;
N: soup per-cent.
Beneficial effect:
The described automatic flocculant addition Controlling System of the application of the invention method can guarantee that the consumption of flocculation agent reaches optimum amount according to the timely add-on of adjusting flocculation agent of water quality and quantity fluctuation of water outlet.Simultaneously, to the flow of sewage and the feedback of water quality, in time adjust the add-on of flocculation agent, guarantee the water treatment effect according to the water quality and quantity that comes water according to the flow that is provided with and feedback control system.Advantage of the present invention is:
1, set up the mathematical model that adds dose and flooding velocity and TP and SS, determined that the best of the different quality water yield adds dose;
2, for the sewage work of online SS determinator of effluent adopting and online TP analyser, need not to buy expensive online TP analyser and online SS determinator once more, saved cost greatly;
3, whole medicine system adopts computer program control, has guaranteed the stability of device operation;
4, realized closed-loop control, rely on dosing software design program to realize that any time adds the optimum control of dose, saved cost of water treatment greatly, guarantee to handle the back water conditioning, reach under the situation of high quality water quality in assurance, the consumption of flocculation agent reduces more than 20%;
5, the level of automation height has alleviated working strength of workers, has reduced the waste of medicament, having reduced the hesitation medicament adds inaccurate and risk that cause, advance to have reduced the chance that the workman contacts medicament, improved production efficiency, help the personnel reduction and enlargement of sewage work's production station simultaneously;
6, both be applicable to newly-built water factory, also be fit to tapping the potential and upgrade technologically of old water factory, and need not change original process structure substantially tapping the potential and upgrade technologically of old water factory;
7, it is little that effluent quality is subjected to the interference of source water quality, the water yield, improved the stability of water outlet, prolonged the work-ing life of the backwashing period and the filtrate in filter tank, improved producing water ratio, remarkable in economical benefits.
Description of drawings
Fig. 1 is a schema of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention and embodiment thereof are described in further detail.
The automatic flocculant addition Controlling System comprises feedback control system, PLC Controlling System, volume pump, mixing tank and filtering basin; Feedback control system is arranged at the sewage equipped at outlet port, by the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, be used for measuring the online SS determinator composition of sewage solid suspension content, flow instrument wherein, online TP monitor, the input terminus of online SS determinator respectively with the sewage delivery port, the input terminus of mixing tank is connected, flow instrument, online TP monitor, the output terminal of online SS determinator is connected with the input terminus of PLC Controlling System respectively, and the output terminal of PLC Controlling System connects volume pump successively, mixing tank, filtering basin.
Method for controlling automatic flocculant addition of the present invention comprises the steps,
A, utilize flow instrument to measure the discharge of sewage;
B, utilize the content of total phosphorus in the online TP analysis-e/or determining sewage;
C, utilize online SS determinator to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PCL Controlling System, the PCL Controlling System calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculation agent in the mixing tank according to this dosage;
E, mixing tank are rendered to flocculation agent in the sewage, then mixed water are outputed to filtering basin.
Wherein among the step D flocculant dosage according to formula Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) determine; In the preceding formula,
K: correction factor, 0.5≤K≤1.5;
Q: the instantaneous delivery of actual flooding velocity meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the suspended solid that online SS determinator is measured;
A: the total phosphorous standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup specific gravity value;
N: soup per-cent.
With Jiangsu sewage work is example, and mark transformation is carried by this sewage work, uses little flocculation-sand filtration technology as advanced treatment process, makes water outlet bring up to one-level A by sewage drainage standard one-level B, adopts polymerize aluminum chloride (PAC) as flocculation agent.In use, at first set the best and add dose Δ X
PAC, drawing k=1, L=7.18, a=0.995, b=0.058 by the long-term mass data in scene, flooding velocity Q is approximately 4166.67m
3/ h, the TP concentration of one-level A standard is 0.5mg/L, SS concentration is 10mg/L, draws X at last
PACValue.
X
PAC＝1×Q×7.18×(P-0.5)
0.995×(S-10)
0.058/(1×10％)
Set a TP and SS initial value 1,20, target value is sent to the automatic dosing system of flocculation agent, adjust flocculant addition by the PLC Controlling System, and send appointment to volume pump, volume pump adds a certain amount of flocculation agent to mixing tank.Feedback control system is before sewage disposal, the flow of mensuration sewage and TP, SS concentration, measurement result is fed back to the PLC Controlling System, and the PLC Controlling System is in time adjusted amount and joining day that flocculation agent adds according to the feedback of flow and TP and SS feedback control system.
Claims (1)
1. method for controlling automatic flocculant addition, first step is the installation of automatic flocculant addition Controlling System: described Controlling System comprises feedback control system, PLC Controlling System, volume pump, mixing tank and filtering basin; Feedback control system by the flow instrument of measuring the discharge of sewage, be used for measuring the online TP monitor of the content of sewage total phosphorus, the online SS determinator that is used for measuring the sewage solid suspension content is formed; Feedback control system is arranged at the sewage equipped at outlet port, wherein the input terminus of flow instrument, online TP monitor, online SS determinator is connected with the input terminus of sewage delivery port, mixing tank respectively, the output terminal of flow instrument, online TP monitor, online SS determinator is connected with the input terminus of PLC Controlling System respectively, and the output terminal of PLC Controlling System connects volume pump, mixing tank, filtering basin successively; It is characterized in that: automatic flocculant addition comprises the steps:
A, utilize flow instrument to measure the discharge of sewage;
B, utilize the content of total phosphorus in the online TP analysis-e/or determining sewage;
C, utilize online SS determinator to measure solid suspension content in the sewage;
D, the value of A-C step measurements is sent in the PLC Controlling System, the PLC Controlling System calculates flocculant dosage according to the result who measures, and then this dosage is sent to volume pump, and volume pump outputs to flocculation agent in the mixing tank according to this dosage;
E, mixing tank are rendered to flocculation agent in the sewage, then mixed water are outputed to filtering basin.
Wherein among the step D calculating of flocculant dosage according to formula/Δ X
Medicament=k * Q * L * (P-1.1A)
a* (S-1.05B)
b/ (λ * N) determine; In the formula,
K: correction factor, 0.5≤K≤1.5;
Q: the instantaneous delivery of actual flooding velocity meter;
L: standard medicine consumption;
P: the content of total phosphorus in the sewage of online TP monitor monitoring;
S: the content of the suspended solid that online SS determinator is measured;
A: the total phosphorous standard in the water outlet;
B: the solid suspension content standard in the water outlet;
A: modified index, 0.8≤a≤1.0;
B: undetermined coefficient, 0≤b≤0.2;
λ: soup specific gravity value;
N: soup per-cent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102343414A CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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|---|---|---|---|
| CN2009102343414A CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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| CN101717143A true CN101717143A (en) | 2010-06-02 |
| CN101717143B CN101717143B (en) | 2012-02-01 |
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ID=42431791
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|---|---|---|---|
| CN2009102343414A Expired - Fee Related CN101717143B (en) | 2009-11-24 | 2009-11-24 | Method for controlling automatic flocculant addition |
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| CN102351338A (en) * | 2011-06-09 | 2012-02-15 | 冷勇 | Advanced treating system for drinking tap water and water quality treating method |
| CN102491471A (en) * | 2011-11-14 | 2012-06-13 | 黑龙江绿水悠环保科技有限公司 | Water-purifying process and device for high-efficiency flocculating agent |
| CN102736588A (en) * | 2012-05-25 | 2012-10-17 | 北京天地云箱科技有限公司 | Monitoring method and system |
| CN102976468A (en) * | 2012-12-07 | 2013-03-20 | 上海应用技术学院 | Automatic chemical adding machine in water treatment and applications thereof |
| CN106227251A (en) * | 2016-08-30 | 2016-12-14 | 河南华东工控技术有限公司 | Intelligent dosing system |
| CN106800319A (en) * | 2017-02-08 | 2017-06-06 | 苏州森荣环保处置有限公司 | Automatic medicament feeding system and its adding method thereof |
| CN106809988A (en) * | 2017-01-03 | 2017-06-09 | 沈阳建筑大学 | A kind of low temperature filtering cloth filtering pool filter water tiny flocculation body quickly forms control method |
| CN107055732A (en) * | 2017-05-17 | 2017-08-18 | 北京易沃特科技有限公司 | A kind of heavy metals minimizing technology and device |
| CN107522272A (en) * | 2017-08-23 | 2017-12-29 | 沈阳建筑大学 | Promote the mixed flocculation agent and its application method of aerobic particle mud |
| CN107540069A (en) * | 2017-10-23 | 2018-01-05 | 河海大学 | A kind of full-automatic coagulant dosage system |
| CN108658287A (en) * | 2018-04-25 | 2018-10-16 | 江苏大学 | A kind of Sewage advanced treatment control system and control method |
| CN108793351A (en) * | 2017-04-26 | 2018-11-13 | 北京济安金信科技有限公司 | Sewage water treatment method, system and the electronic equipment with the system |
| CN113264327A (en) * | 2021-05-20 | 2021-08-17 | 太原钢铁(集团)有限公司 | Medicament feeding device and method |
| CN114275866A (en) * | 2021-12-21 | 2022-04-05 | 河南和方科技有限公司 | Intelligent dosing flocculation precipitation system |
| CN114545985A (en) * | 2022-04-21 | 2022-05-27 | 神美科技有限公司 | Floc characteristic monitoring and process feedback-based dosing system and method |
| CN114863313A (en) * | 2022-03-24 | 2022-08-05 | 上海擎测机电工程技术有限公司 | Water treatment process monitoring method based on image recognition |
| CN114940533A (en) * | 2022-06-20 | 2022-08-26 | 中建三局绿色产业投资有限公司 | Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system |
| CN116589064A (en) * | 2023-07-18 | 2023-08-15 | 威海华友节能科技有限公司 | Dosing device and dosing method for sewage treatment |
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| CN1049640C (en) * | 1994-02-23 | 2000-02-23 | 机械电子工业部机械工业环境保护技术研究所 | Auto-controlling system for dewatering sludge |
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| CN102351338B (en) * | 2011-06-09 | 2013-06-26 | 威海正大水务设备科技有限公司 | Advanced treating system for drinking tap water and water quality treating method |
| CN102351338A (en) * | 2011-06-09 | 2012-02-15 | 冷勇 | Advanced treating system for drinking tap water and water quality treating method |
| CN102491471A (en) * | 2011-11-14 | 2012-06-13 | 黑龙江绿水悠环保科技有限公司 | Water-purifying process and device for high-efficiency flocculating agent |
| CN102491471B (en) * | 2011-11-14 | 2014-12-03 | 黑龙江绿水悠环保科技有限公司 | Water-purifying process and device for high-efficiency flocculating agent |
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| CN102976468A (en) * | 2012-12-07 | 2013-03-20 | 上海应用技术学院 | Automatic chemical adding machine in water treatment and applications thereof |
| CN106227251A (en) * | 2016-08-30 | 2016-12-14 | 河南华东工控技术有限公司 | Intelligent dosing system |
| CN106227251B (en) * | 2016-08-30 | 2019-05-28 | 河南华东工控技术有限公司 | Intelligent dosing system |
| CN106809988A (en) * | 2017-01-03 | 2017-06-09 | 沈阳建筑大学 | A kind of low temperature filtering cloth filtering pool filter water tiny flocculation body quickly forms control method |
| CN106800319A (en) * | 2017-02-08 | 2017-06-06 | 苏州森荣环保处置有限公司 | Automatic medicament feeding system and its adding method thereof |
| CN108793351A (en) * | 2017-04-26 | 2018-11-13 | 北京济安金信科技有限公司 | Sewage water treatment method, system and the electronic equipment with the system |
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| CN113264327A (en) * | 2021-05-20 | 2021-08-17 | 太原钢铁(集团)有限公司 | Medicament feeding device and method |
| CN114275866A (en) * | 2021-12-21 | 2022-04-05 | 河南和方科技有限公司 | Intelligent dosing flocculation precipitation system |
| CN114863313A (en) * | 2022-03-24 | 2022-08-05 | 上海擎测机电工程技术有限公司 | Water treatment process monitoring method based on image recognition |
| CN114545985A (en) * | 2022-04-21 | 2022-05-27 | 神美科技有限公司 | Floc characteristic monitoring and process feedback-based dosing system and method |
| CN114940533A (en) * | 2022-06-20 | 2022-08-26 | 中建三局绿色产业投资有限公司 | Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system |
| CN114940533B (en) * | 2022-06-20 | 2023-03-31 | 中建三局绿色产业投资有限公司 | Intelligent control system and method for adding medicament in magnetic coagulation sedimentation system |
| CN116589064A (en) * | 2023-07-18 | 2023-08-15 | 威海华友节能科技有限公司 | Dosing device and dosing method for sewage treatment |
| CN116589064B (en) * | 2023-07-18 | 2024-01-26 | 威海华友节能科技有限公司 | Dosing device and dosing method for sewage treatment |
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