CN103803678B - Automatic control system and method for treating heavy metal wastewater based on ion-exchange resin method - Google Patents
Automatic control system and method for treating heavy metal wastewater based on ion-exchange resin method Download PDFInfo
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- CN103803678B CN103803678B CN201410088981.XA CN201410088981A CN103803678B CN 103803678 B CN103803678 B CN 103803678B CN 201410088981 A CN201410088981 A CN 201410088981A CN 103803678 B CN103803678 B CN 103803678B
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Abstract
The invention discloses an automatic control system and an automatic control method for treating heavy metal wastewater based on an ion-exchange resin method, wherein the system comprises an image collector, a color difference identifier, a first transmitter, a controller, a second transmitter, a relay and an upper computer; the image collector is used for collecting color images of the ion-exchange resin and transfers the color images to the color difference identifier, the color difference identifier extracts characteristics from the transferred color images and transmits the extracted characteristic values to the controller, the controller is used for carrying out comparative analysis on the received characteristic values and given reference contrast color characteristics, the analysis result is concluded and output through the transmitter, and finally, whether the resin needs to be regenerated is displayed on the upper computer and a regeneration program is executed through a valve which is controlled by the relay. The automatic control system and the automatic control method are capable of overcoming the problem that effluent exceeds standard due to lag of monitoring on the ion-exchange resin effluent, caused by an artificial reason; the computer is used for identifying the color change of the ion-exchange resin to determine an automatic saturation point, and therefore, stable and up-to-standard effluent quality is guaranteed.
Description
Technical field
The present invention relates to the technical field of wastewater treatment, particularly a kind of automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby and method.
Background technology
In electroplating waste water treatment technology, ion-exchange-resin process have removal efficiency high, can the advantage such as comparatively simple, the processing ease of concentration and recovery useful matter, equipment, make the method practical application very extensive.But during due to ion-exchange-resin process process heavy metal wastewater thereby, due to the situation that the reasons such as the hysteresis quality of detecting instrument and manual operation usually cause effluent quality to exceed standard, limit the universal of ion-exchange-resin process and promote.Along with the raising of national environmental standard, the raising of especially heavy metal contamination emission standard, continual and steady qualified discharge is more and more important to enterprise.One of them very crucial step is exactly the saturation point how judging ion exchange resin, prevents discharge beyond standards event from occurring.
Judge that the method for resin saturating point is less, be mostly according to ion exchange resin absorption saturated after variation characteristic realize, usual method has following three kinds:
Method one: carry out the saturation point judging ion exchange resin by analyzing the change of concentration of heavy metal ion before and after ion exchange resin Inlet and outlet water.Judgment basis is when the concentration of heavy metal ion in Inlet and outlet water is roughly equal, illustrates that resin reaches capacity.The method accuracy of judgement, but Analytical equipment is expensive, and analysis cost is higher, and analysis time is longer.
Method two: application pH measuring technology judges the saturation point of ion exchange resin.Its method is: install pH sensor at the exchange column water outlet that ion exchange resin is housed, and the pH value of monitoring water outlet, reaches certain value in the pH scope of setting, and after keeping certain hour, illustrate that ion exchange resin reaches saturation point when pH value.But there is no linear relationship accurately between water outlet pH value and water outlet heavy metal concentration, be difficult to accurately judge that resin is saturated by pH.
Method three: according to long-term production run experience, the colour-change of range estimation ion exchange resin or Inlet and outlet water water quality colour-change judge the saturation point of resin.The method simple, intuitive, but need operator's real time inspection, and the discharge beyond standards event that artificial origin causes frequently occurs.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of automatic control system based on ion exchange method process heavy metal wastewater thereby is provided.
Another object of the present invention is to, a kind of control method based on ion exchange method process heavy metal wastewater thereby is provided.
In order to reach above-mentioned first object, the present invention by the following technical solutions:
Based on the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, comprise image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter, rly. and upper computer; Described image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter and upper computer are linked in sequence, and described transmitter is also connected with rly., and image acquisition device is connected by optical cable with aberration identifier;
Described image acquisition device, gathers the color image of ion exchange resin for the timed interval according to setting, and the color image collected by optical cable transmission to aberration identifier;
Described aberration identifier, carry out feature extraction for the color image transmitted image acquisition device, the eigenwert extracted transfers to controller;
Described controller, for being compared by the bench-marking color characteristic of the eigenwert received and setting, judged result is exported with standard signal by transmitter;
Described upper computer, for showing resin the need of regeneration.
Preferably, described image acquisition device is high-definition camera, and described high-definition camera realizes the automatic shooting of image, and carries out real-time Transmission to photographing picture signal.
Preferably, described aberration identifier extracts the image pixel component variance on column direction automatically, when this variance yields is greater than inner setting benchmark, sends graphic information to controller.
Preferably, the image pixel component variance of aberration identifier compares with inner setting benchmark by described controller, when this value is greater than setting benchmark, can thinks that resin is saturated, send signal to controller, carry out valve conversion and reproducer.
In order to reach above-mentioned second object, the present invention by the following technical solutions:
Based on the method for the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, comprise the steps:
S1, saturated to ion exchange resin Adsorption of Heavy Metals after color image acquisition device carry out IMAQ;
S2, according to the water outlet of ion exchange resin and the color belt length curve plotting of Adsorption of Heavy Metals;
The chromatic aberration of S3, record resin, carries out the location of image-capture field, according to image analysis, carries out aberration setting;
S4, image acquisition device gather the color image of ion exchange resin according to setting-up time interval, and color image is passed to aberration identifier by optical cable;
S5, aberration identifier carry out column direction pixel component variance to the color image transmitted and extract, and the eigenwert extracted transfers to controller;
The bench-marking color characteristic of the eigenwert received and setting compares by S6, controller;
S7, judged result are exported with standard signal by transmitter, on upper computer, finally show resin the need of regeneration.
Preferably, in step S1, when resin is saturated, can there is noticeable change in its color, by image acquisition device to IMAQ and by the information transmission that collects to aberration identifier.
Preferably, in step S2, when saturated its color generation noticeable change rear of resin, confirming column direction site by measuring water outlet heavy metal content, drawing water outlet heavy metal concentration and column direction site curve, setting benchmark site and aberration.
Preferably, in step S4, image acquisition device gathers after column direction pixel component variance is extracted by setting-up time and sends to aberration identifier.
Preferably, in step S5, after column direction pixel component variance is extracted by aberration identifier, be analyzed with setting benchmark aberration, identification colors feature judges that whether resin is saturated.
Preferably, in step S6, controller, by column direction pixel component variance and the comparative analysis of setting benchmark aberration, when component variance is greater than setting benchmark aberration, namely judges that resin is saturated, and sends instruction and carry out reproducer.
The present invention has following advantage and effect relative to prior art:
1, the present invention can overcome because artificial origin causes ion exchange resin to go out the delayed problem causing water outlet to exceed standard of water monitoring, carries out automatic saturation point judgement, guarantee that stable effluent quality is up to standard by the colour-change of computer recognizing ion exchange resin.
2, the method that the present invention is accurate and feasible can understand the degree of saturation of ion exchange resin real-time and accurately, judges the saturation point of ion exchange resin, the conversion of autocontrol valve and resin regeneration procedures, ensures stable water outlet qualified discharge
Accompanying drawing explanation
Fig. 1 is the structured flowchart of automatic control system of the present invention;
Fig. 2 is the feedback control schematic diagram of automatic control system of the present invention.
Fig. 3 is the schema of control method of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1 and Figure 2, a kind of process automatic control system of ion exchange method process heavy metal wastewater thereby, image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter, rly. and upper computer; Described image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter and upper computer are linked in sequence, and described transmitter is also connected with rly., and image acquisition device is connected by optical cable with aberration identifier;
Described image acquisition device, gathers the color image of ion exchange resin for the timed interval according to setting, and the color image collected by optical cable transmission to aberration identifier;
Described aberration identifier, carry out feature extraction for the color image transmitted image acquisition device, the eigenwert extracted transfers to controller;
Described controller, for being compared by the bench-marking color characteristic of the eigenwert received and setting, judged result is exported with standard signal by transmitter;
Described upper computer, for showing resin the need of regeneration.
In the present embodiment, described image acquisition device is high-definition camera, and described high-definition camera realizes the automatic shooting of image, and carries out real-time Transmission to photographing picture signal.
Described aberration identifier extracts the image pixel component variance on column direction automatically, when this variance yields is greater than inner setting benchmark, sends graphic information to controller.
The image pixel component variance of aberration identifier compares with inner setting benchmark by described controller, when this value is greater than setting benchmark, can thinks that resin is saturated, send signal to controller, carry out valve conversion and reproducer.
As shown in Figure 3, the present embodiment, based on the method for the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, comprises the steps:
S1, saturated to ion exchange resin Adsorption of Heavy Metals after color image acquisition device carry out IMAQ;
S2, according to the water outlet of ion exchange resin and the color belt length curve plotting of Adsorption of Heavy Metals;
The chromatic aberration of S3, record resin, carries out the location of image-capture field, according to image analysis, carries out aberration setting;
S4, image acquisition device gather the color image of ion exchange resin according to setting-up time interval, and color image is passed to aberration identifier by optical cable;
S5, aberration identifier carry out column direction pixel component variance to the color image transmitted and extract, and the eigenwert extracted transfers to controller;
The bench-marking color characteristic of the eigenwert received and setting compares by S6, controller;
S7, judged result are exported with standard signal by transmitter, on upper computer, finally show resin the need of regeneration.
In step S1, when resin is saturated, can there is noticeable change in its color, by image acquisition device to IMAQ and by the information transmission that collects to aberration identifier.
In step S2, when saturated its color generation noticeable change rear of resin, confirming column direction site by measuring water outlet heavy metal content, drawing water outlet heavy metal concentration and column direction site curve, setting benchmark site and aberration.
In step S4, image acquisition device gathers after column direction pixel component variance is extracted by setting-up time and sends to aberration identifier.
In step S5, after column direction pixel component variance is extracted by aberration identifier, be analyzed with setting benchmark aberration, identification colors feature judges that whether resin is saturated.
In step S6, controller, by column direction pixel component variance and the comparative analysis of setting benchmark aberration, when component variance is greater than setting benchmark aberration, namely judges that resin is saturated, and sends instruction and carry out reproducer.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. based on the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, it is characterized in that, comprise image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter, rly. and upper computer; Described image acquisition device, aberration identifier, the first transmitter, controller, the second transmitter and upper computer are linked in sequence, and described transmitter is also connected with rly., and image acquisition device is connected by optical cable with aberration identifier;
Described image acquisition device, gathers the color image of ion exchange resin for the timed interval according to setting, and the color image collected by optical cable transmission to aberration identifier;
Described aberration identifier, carry out feature extraction for the color image transmitted image acquisition device, the eigenwert extracted transfers to controller;
Described controller, for being compared by the bench-marking color characteristic of the eigenwert received and setting, judged result is exported with standard signal by transmitter;
Described upper computer, for showing resin the need of regeneration.
2. the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 1, it is characterized in that, described image acquisition device is high-definition camera, and described high-definition camera realizes the automatic shooting of image, and carries out real-time Transmission to photographing picture signal.
3. the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 1, it is characterized in that, described aberration identifier extracts the image pixel component variance on column direction automatically, when this variance yields is greater than inner setting benchmark, sends graphic information to controller.
4. the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 1, it is characterized in that, the image pixel component variance of aberration identifier compares with inner setting benchmark by described controller, when this value is greater than setting benchmark, can think that resin is saturated, send signal to controller, carry out valve conversion and reproducer.
5., according to claim 1 based on the method for the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, it is characterized in that, comprise the steps:
S1, saturated to ion exchange resin Adsorption of Heavy Metals after color image acquisition device carry out IMAQ;
S2, according to the water outlet of ion exchange resin and the color belt length curve plotting of Adsorption of Heavy Metals;
The chromatic aberration of S3, record resin, carries out the location of image-capture field, according to image analysis, carries out aberration setting;
S4, image acquisition device gather the color image of ion exchange resin according to setting-up time interval, and color image is passed to aberration identifier by optical cable;
S5, aberration identifier carry out column direction pixel component variance to the color image transmitted and extract, and the eigenwert extracted transfers to controller;
The bench-marking color characteristic of the eigenwert received and setting compares by S6, controller;
S7, judged result are exported with standard signal by transmitter, on upper computer, finally show resin the need of regeneration.
6. the method for the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 1, it is characterized in that, in step S1, when resin is saturated, can there is noticeable change in its color, by image acquisition device to IMAQ and by the information transmission that collects to aberration identifier.
7. according to claim 5 based on the method for the automatic control system of ion-exchange-resin process process heavy metal wastewater thereby, it is characterized in that, in step S2, when saturated its color generation noticeable change rear of resin, column direction site is confirmed by measuring water outlet heavy metal content, draw water outlet heavy metal concentration and column direction site curve, setting benchmark site and aberration.
8. the method for the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 5, it is characterized in that, in step S4, image acquisition device gathers after column direction pixel component variance is extracted by setting-up time and sends to aberration identifier.
9. the method for the automatic control system based on ion-exchange-resin process process heavy metal wastewater thereby according to claim 5, it is characterized in that, in step S6, controller is by column direction pixel component variance and the comparative analysis of setting benchmark aberration, when component variance is greater than setting benchmark aberration, namely judge that resin is saturated, and send instruction and carry out reproducer.
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| CN201410088981.XA CN103803678B (en) | 2014-03-11 | 2014-03-11 | Automatic control system and method for treating heavy metal wastewater based on ion-exchange resin method |
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| CN103803678B true CN103803678B (en) | 2015-01-14 |
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| CN107285432A (en) * | 2017-08-25 | 2017-10-24 | 张家港光洲机械制造有限公司 | A kind of self-action water softening system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253873A (en) * | 2007-03-30 | 2008-10-23 | Mitsui Eng & Shipbuild Co Ltd | Method for monitoring sludge and system for monitoring and controlling sludge |
| CN102879393A (en) * | 2012-09-20 | 2013-01-16 | 江苏大学 | PH value detection method and device based on image processing |
| CN103335955A (en) * | 2013-06-19 | 2013-10-02 | 华南农业大学 | Water quality on-line monitoring method and device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008253873A (en) * | 2007-03-30 | 2008-10-23 | Mitsui Eng & Shipbuild Co Ltd | Method for monitoring sludge and system for monitoring and controlling sludge |
| CN102879393A (en) * | 2012-09-20 | 2013-01-16 | 江苏大学 | PH value detection method and device based on image processing |
| CN103335955A (en) * | 2013-06-19 | 2013-10-02 | 华南农业大学 | Water quality on-line monitoring method and device |
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Granted publication date: 20150114 Termination date: 20170311 |