CN1270219C - Self-adaptive control administration apparatus and process thereof - Google Patents
Self-adaptive control administration apparatus and process thereof Download PDFInfo
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- CN1270219C CN1270219C CN 02115323 CN02115323A CN1270219C CN 1270219 C CN1270219 C CN 1270219C CN 02115323 CN02115323 CN 02115323 CN 02115323 A CN02115323 A CN 02115323A CN 1270219 C CN1270219 C CN 1270219C
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Abstract
The present invention relates to a self-adaptive control chemical feeding device which is composed of a self-adaptive control unit and a metering feeding and adding unit, wherein the self-adaptive control unit is composed of a control unit, a man-machine interface, a speech prompt system and an operating mode selecting panel; the metering feeding and adding unit is composed of a frequency converter and a chemical feeding pump. Chemical feeding control mode adopts a database inquiry method; the database is established according to a theory that 'each chemical feeding consumption is closely correlated with the turbidity and the temperature of raw water; the quality of raw water has fixed relationship with seasons; with the development of time, the quality of raw water in a same season for each year can also change. '; the database can process data according to a data processing method with a parameter table, etc.; the data in the data base reflects the relation among optimal chemical feeding quantity, seasons and the quality of raw water. Because the device has an automatically learning capacity with speech assistance, for different areas, different water quality and the change of water quality and seasons, the device can automatically learn an optimal chemical feeding control law to store the optimal chemical feeding control law in a dynamic database. At the state of adaptive control, the device can automatically select the optimal chemical feeding quantity according to the water quality and an environmental condition inquiry database, and can automatically adapt to environmental factors and a water quality situation; therefore, the device has an adaptive control function.
Description
Affiliated technical field
Control adds a kind of equipment and the best dosage control method thereof that dose adds in the administration system for water treatment plant controls automatically in the present invention.
Background technology
The best dosage control of coagulant is the key of water treatment plant's technology controlling and process.It is directly connected to clean-up effect and water producing cost.Because the factor that influence coagulation effect is a lot, the situation complexity, whole in addition coagulation, precipitation process time are long, bring very big difficulty to the control of Automatic Dosing.At present, popular control mode:
1, electric current apparatus (SCD) single-factor control system
The available colloid current potential of the particle-stabilised degree of water-borne glue body is described, and the colloid current potential is high more, and stability is big more, and adding dose will be many more.Utilize electric current apparatus (SCD) detection by quantitative colloid potential value indirectly, in order to the particle-stabilised degree of reflection water-borne glue body.Therefore form the simple control system of single detected parameters with SCD, also be the single-factor control system.
This system's control principle is simple and reliable, but result of use is unsatisfactory, mainly contains following reason: impurity, organism are adsorbed on the SCD probe in (1) water, cause that detection signal weakens or distortion; (2) owing to be single-factor control, SCD setting value size has just determined coagulation effect.But the SCD setting value should change along with raw water turbidity, flow, temperature, the isoparametric variation of pH value, and this brings very big difficulty with regard to the use of giving SCD; (3) the SCD meter sensitivity is lower, and variation range is little, and when factors such as water quality, flow during in less range, SCD value even can not react its variation reduces system's antijamming capability.
2, the feedforward feedback regulating system of raw water flow and settling basin turbidity composition
This is a feedforward feedback control system, and the settling basin delivery turbidity is as feedback quantity, and raw water flow is controlled as the feedforward amount.It is longer to be reacted to the precipitated outlet water time from dosing, generally needs 1.5～2.0 hours, and it is big to lag behind for parameter reacting conditions such as turbidity, temperature, so control deviation is big during change of water quality; Raw water flow participates in the only proportional adjusting of control, has difference to regulate low precision so two parameter controls all belong to.
3, set up feedforward and feedback mathematical model, realize control automatically
Consider the transient change of raw water flow and water quality, consider the influence of the variation of water conservancy condition and each parameter in coagulating sedimentation in the water-purifying process, the filtering technique again to purifying water effect, utilize a large amount of (hundreds of group) dispensing statistics, use multiple linear regression method, derive feedforward and feedback mathematic(al) mode.But this mode exists following shortcoming, (1) need be according to historical data in the means of production, with the non-linear regression method mathematic(al) mode of deriving, and the foundation of this mathematic(al) mode, specialize in the expert of computational mathematics exactly, also need the plenty of time to go to calculate by computing machine; (2) mathematic(al) mode is very complicated, relates to condition, parameter is a lot, and each water factory's conditional parameter is different, and mathematic(al) mode can not be general; (3) mathematic(al) mode in case set up just can not be changed, but As time goes on, even the raw water quality in same the river, same reservoir also can change.At this moment, the mathematic(al) mode of setting up according to former water quality parameter just becomes inaccurate.
So this method can not generally be promoted, also seldom use in the reality.
4, the application of other control method
Except above-mentioned control system for adding drugs, application is less on some engineerings in addition, is in the dosing control method of laboratory stage.As: simulation settling basin or filter tank method.
Summary of the invention
In order to solve the deficiency that existing Automatic Dosing control exists, the present invention proposes a kind of novel automatic chemical dosing control mode---self-adaptive control administration mode.Equipment characteristic is to have self-learning function, can learn automatically, the unit dosage when writing down, accumulating the optimal coagulation effect, and store in the database in the lump together with state values such as relevant season, turbidity, temperature, when self-adaptive control administration apparatus operates in the adaptive control mode, system's basis season, temperature, turbidity state at that time, in database, choose relevant unit's dosage, revise according to the raw water flow size, system just exports suitable dosage and reaches the optimal coagulation effect again.This instructions is put forward the implication of " optimal coagulation effect ": satisfy the requirement of post precipitation turbidity and dosage is minimum.Along with the variation of water quality, the automatic alert of equipment voice system to the system database correlation parameter revise, perfect.Self-adaptive control administration apparatus has self-learning function, can constantly improve data-base content, satisfies different regions, different quality water factory, reaches the self-adaptation effect.
1, theoretical foundation
Feedwater treatment theory and practice confirm: " dispensing unit consumption and raw water turbidity, temperature are closely related, and fixed relationship is arranged in raw water quality and season.And As time goes on, the raw water quality in annual identical season also can change." in influencing the delivery turbidity factors of settling basin, dosage and raw water turbidity, water temperature are in close relations, and that parameters such as ammonia nitrogen, nitrite, dissolved oxygen DO changed in 1 year is very little, is not the principal element that influences dosage; Consider simultaneously and add dose by settling basin instrument is not relevant with the raw water quality factor, also with to enter the settling basin raw water flow relevant, the different operation water yields will influence the flocculation result, and the raw water flow parameter is directly proportional with dosage, therefore this parameter of utilization dispensing unit consumption in pattern.
2, self-adaptive control administration principle
The self-adaptive control administration method adopts the parameter contrast to carry out dosing control.In the storage unit of controller (as Programmable Logic Controller PLC) (as E
2PROM) the unit dosage of the turbidity of the former water of the unit's of presetting dosage database----Various Seasonal, the corresponding optimal coagulation effect of temperature in.Raw water flow can calculate in control module the influence that adds dose, the unified dosage that outputs signal to the Frequency Converter Control dosing pump; Or control module exports the raw water flow control signal separately and gives the automatic stroke adjuster control of dosing pump dosing pump stroke size, with auto-adaptive controling signal constitute two-parameter, the dosage of control dosing pump.Because parameters such as ammonia nitrogen, nitrite, dissolved oxygen DO are in same water factory parameter basic fixed in each in season, therefore to each season different turbidity, when the temperature dosage is set compensation has been done in ammonia nitrogen, nitrite, the isoparametric influence of dissolved oxygen DO.The similar expert of self-adaptive control administration thought sets up the feedforward feedback mathematical model, all considers the influence to dosage of turbidity, water quality parameter, needs a large amount of original reliable parameter but the expert sets up the feedforward feedback mathematical model, and a lot of water factories do not satisfy the requirements; Especially the feedforward feedback mathematical model is in case foundation immobilizes, and the parameter that water quality changes the back model can reach optimal coagulant dose along with change.Self-adaptive control administration has self-learning function, the best unit dosage that will meet local water quality, season, temperature automatically records in the database, and along with change of water quality, alert is to the database parameter modification automatically for self-adaptive control administration apparatus, so self-adaptive control administration apparatus is fit to the water factory of territory, different quality characteristics variously.Under the self study state, just can set up reliable water quality parameter database by skilled operating personnel operation, and the content of database constantly obtains correction along with the variation of water quality.Under the adaptive control state, system can choose suitable dosage, obtains the optimal coagulation effect.
3, self-adaptive control administration apparatus is formed and effect
Self-adaptive control administration apparatus is by two most of compositions, is respectively self-adaptive controller and metering adds the unit.Self-adaptive controller comprises: controller 1, man-machine interface 2, speech prompting system 3, Operation Mode Selection panel 4; Metering adds the unit and comprises: frequency converter 5, chemicals feed pump 6
(1) self-adaptive controller effect: receive temperature, turbidity signal; Typing, storage, modification database; Operation Mode Selection; Output dispensing control signal.
Man-machine interface 2 effect: the on-site supervision water quality parameter, add parameter; Video data storehouse parameter value; Input database parameter and water quality parameter.
Speech prompting system 3: carry out voice suggestion to the operator, guiding operation person carries out database typing and correction work.
Operation Mode Selection panel 4: self-adaptive control administration apparatus is established three kinds of methods of operation: the manual method of operation, the self study method of operation, self-adapting operation mode.
(2) metering adds the unit effect: be the operating part of self-adaptive controller, an amount of medicament is added in the pipeline.
4, the self-adaptive control administration apparatus method of operation
When self-adaptive control administration apparatus just moves, at first enter the self study operation control method, by the experience operator being arranged manually to dispensing control, self-adaptive control administration apparatus compares relevant dosage in present dosage and the database automatically, if do not have these data in the database or differ certain limit with now adding dose, voice system will prompting operation person be determined optimal coagulant dose.After experienced operator's observation or laboratory examination, the operator confirms the existing dosage optimal coagulant dose under the operating mode for this reason, controller is revised the dispensing database data automatically, like this self-adaptive control administration apparatus control module constantly replenish, new database more.The operator also can access database at any time and check, through the operation accumulation in 1 year, self-adaptive control administration apparatus was all revised database perfect, this equipment can be dropped into the self-adapting operation state.Controller is according to different turbidity, temperature, and corresponding Various Seasonal through inquiry judging in database, is selected suitable unit dosage, has had adaptation function.
Turbidity, temperature and raw water flow parameter both can be input in the controller by on-the-spot one-time detection instrument automatically, also can be by man-machine interface with in three all or part of manual typing controllers of parameter, therefore to there not being the old or small-sized water factory of turbidity, temperature, raw water flow one-time detection instrument, also be easy to utilize self-adaptive control administration apparatus to realize self-adaptive control administration, save water factory and transform or construction investment.
The invention has the beneficial effects as follows:, be suitable for the water factory of any region, different quality because self-adaptive control administration apparatus has self study, adaptive characteristic; Utilize novelty, easy method to reach practical, effectively dispensing control; When self-adaptive control administration apparatus is in manual control mode, do not need one-time detection instrument such as turbidimeter, thermometer, flowmeter, save the equipment input cost.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 self-adaptive control administration apparatus steering logic figure
Fig. 2 self-adaptive control administration apparatus composition frame chart
Fig. 3 self-adaptive control administration apparatus database table
Fig. 4, Fig. 5 are the table of contents of Fig. 3 self-adaptive control administration apparatus database table.
Fig. 6, SCD single-factor control system figure
Fig. 7, the feedforward feedback regulating system figure that forms by flow and turbidity
In Fig. 2,1. controller, 2. man-machine interface, 3. speech prompting system, 4. Operation Mode Selection panel, 5. frequency converter, 6. dosing pump
Embodiment
Fig. 1 is self-adaptive control administration apparatus steering logic figure
In Fig. 2, controller 1, man-machine interface 2, speech prompting system 3, Operation Mode Selection panel 4 is formed the dispensing control module; Frequency converter 5, chemicals feed pump 6 are formed metering and are added the unit; Dispensing control module and metering add the unit and connect to form self-adaptive control administration apparatus by cable, pipeline.
Fig. 3, Fig. 4, Fig. 5 are according to " dispensing unit consumption and raw water turbidity, temperature are closely related, and fixed relationship is arranged in raw water quality and season.And As time goes on, the raw water quality in annual identical season also can change." this theoretical database of setting up.The database both method of available form is set up, and data processing methods such as also available curve map method, matrix method, mathematic(al) representation are set up.The present invention adopts schedule method to illustrate.
Fig. 6, Fig. 7 are the employed logic diagram of traditional control technology in the background technology.
Self-adaptive control administration apparatus and method are used for former water treatment procedure and illustrate:
Specific embodiment 1: when certain water factory's self-adaptive control administration apparatus just moved, the operator at first was set to the Self-learning control mode to self-adaptive control administration apparatus.In a certain moment in spring, when 8 ℃ of former water water temperatures, turbidity 26NTU, it is 28g/m that the operator observes the dosing pump dosage
3Speech prompting system prompting operation person replenishes or revises database, by having experience operator observation or laboratory examination to confirm that the effluent quality of settling basin is best, after the operator confirmed, this equipment was entered into controller database with at this moment operating point and unit dosage automatically.Through the operation accumulation in 1 year, self-adaptive control administration apparatus was perfect with the whole typings of database.Afterwards, be about to the adaptive control medicine machine and be set to the adaptive control mode, in a certain moment in the spring in 1 year, it is 20g/m that the adaptive control medicine machine adds unit dosing pump dosage
3When control module receives water temperature, turbidity variable signal, when changing into 8 ℃ of former water water temperatures, turbidity 26NTU, the controller in the control module compares relevant dosage in present dosage and the database automatically.Controller is through the judgement of tabling look-up in database, and when checking in 8 ℃ of former water water temperatures in spring, turbidity 26NTU in Fig. 4 (1# table), dosage should be 28g/m
3So,, controller control of conversion device 5 changes frequency, thus the dosage that changes chemicals feed pump 6 is 28g/m
3If Self-learning control mode and adaptive control mode break down in the time of can not moving, then switch to the manual mode operation, use manual mode control dosing pump dosage.
Specific embodiment 2: when self-adaptive control administration apparatus was set to the adaptive control mode, in a certain moment in summer, it was 20g/m that self-adaptive control administration apparatus adds unit dosing pump dosage
3When control module receives water temperature, turbidity variable signal, when changing into 8 ℃ of former water water temperatures, turbidity 26NTU, controller in the control module compares relevant dosage in present dosage and the database automatically, controller is through tabling look-up judgement in database, when checking in 8 ℃ of former water water temperatures in summer, turbidity 26NTU in Fig. 5 (2# table), dosage should be 16g/m
3Because " dispensing unit consumption and raw water turbidity, temperature are closely related, and fixed relationship is arranged in raw water quality and season.And As time goes on, the raw water quality in annual identical season also can change ".Best dosage under the same temperature of Various Seasonal, same turbidity is inequality.So controller control of conversion device 5 changes frequency, thereby the dosage that changes chemicals feed pump 6 is 16g/m
3
Claims (4)
1, a kind of self-adaptive control administration apparatus adds the unit by control module and metering and forms, and control module is by controller, man-machine interface, and speech prompting system, the Operation Mode Selection panel is formed; Metering adds the unit by frequency converter, chemicals feed pump is formed, it is characterized in that: equipment is divided into self study and two kinds of running statuses of self-adaptation, and under the self study state, the artificial experience that controller accumulative total is correct---the dispensing data under Various Seasonal, different temperatures, the turbidity are set up dispensing and controlled database; Under the self-adaptation state, controller is by scene temperature, turbidity signal, and the data in controlling database with its dispensing according to conditions such as times in season compare, according to corresponding data output signal control of conversion device, and the dosage of adjusting chemicals feed pump; The various parameters of man-machine interface display controller, and can be the data input database; The automatic guiding operation personnel's of speech prompting system mode of operation; The Operation Mode Selection panel can make self-adaptive control administration apparatus select self study, self-adaptation and the method for operation such as manual.
2, adaptive control medicine machine according to claim 1, it is characterized in that: the dosing control mode is taked the data base querying method, the unit's of presetting dosage database in the controller of control module, database root is according to " dispensing unit consumption and raw water turbidity, temperature are closely related; fixed relationship is arranged in raw water quality and season; and As time goes on; the raw water quality in annual identical season also can change " this theory foundation, and database can adopt parameter list, curve map, matrix, mathematic(al) representation method deal with data.
3, adaptive control medicine machine according to claim 1, it is characterized in that: the dosing control mode has adopted sound prompt function, the operator can replenish, revise or new database more by the voice suggestion mode, and this database that has been corrected can adapt to the raw water quality that has changed.
4, medicine equipment is returned in adaptive control according to claim 1, it is characterized in that: the dosing control mode has the manual method of operation, the self study method of operation and self-adapting operation mode, and can transform the switch switching by manual/self study/self-adaptation on the Operation Mode Selection panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02115323 CN1270219C (en) | 2002-06-03 | 2002-06-03 | Self-adaptive control administration apparatus and process thereof |
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| CN 02115323 CN1270219C (en) | 2002-06-03 | 2002-06-03 | Self-adaptive control administration apparatus and process thereof |
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| CN1270219C true CN1270219C (en) | 2006-08-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864230A (en) * | 2014-03-05 | 2014-06-18 | 长沙中联重科环卫机械有限公司 | Scaling inhibitor adding control system, method and device as well as sewage treatment equipment |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101607151B (en) * | 2009-01-09 | 2011-05-18 | 湖南华博科技开发有限公司 | Embedded intelligent dosing controller and control method thereof |
| CN105425592B (en) * | 2016-01-05 | 2017-12-08 | 大唐环境产业集团股份有限公司 | A kind of water treatment medicine digitizes on-line control system |
| CN107219779A (en) * | 2016-03-22 | 2017-09-29 | 周楠 | The addition method and device of a kind of water treatment agent |
| CN107037730A (en) * | 2017-04-14 | 2017-08-11 | 聚光科技(杭州)股份有限公司 | Remove the automation pretreatment unit and method of pollutant and suspended particulate substance in water body |
| DE112018006125T5 (en) * | 2017-12-01 | 2020-08-13 | Mitsubishi Heavy Industries, Ltd. | CHEMICAL FEED CONTROL DEVICE, WATER TREATMENT SYSTEM, CHEMICAL FEED CONTROL PROCEDURE AND PROGRAM |
| CN110426957B (en) * | 2019-07-31 | 2020-03-13 | 深圳信息职业技术学院 | Water plant dosing system self-adaptive sliding mode control method based on time delay observer |
| CN112759048B (en) * | 2020-12-21 | 2022-10-11 | 上海熊猫机械(集团)有限公司 | PAC solution intelligent feeding control method |
| CN114563988A (en) * | 2022-01-26 | 2022-05-31 | 浙江中控信息产业股份有限公司 | Water plant intelligent PAC adding method and system based on random forest algorithm |
-
2002
- 2002-06-03 CN CN 02115323 patent/CN1270219C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103864230A (en) * | 2014-03-05 | 2014-06-18 | 长沙中联重科环卫机械有限公司 | Scaling inhibitor adding control system, method and device as well as sewage treatment equipment |
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Address after: 518172, B, room 1202, building 4, Longgang Tian An Digital City, Longgang District, Guangdong, Shenzhen Patentee after: Qingquan Water Co., Ltd.Shenzhen Address before: 518008, building 16, Shi Zhen building, No. 3017, Luohu District, Guangdong, Shenzhen, Jiefang Road Patentee before: Qingquan Water Co., Ltd.Shenzhen |
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