CN202083700U - On-line total cadmium monitoring instrument for water quality by adopting ultraviolet digestion method - Google Patents
On-line total cadmium monitoring instrument for water quality by adopting ultraviolet digestion method Download PDFInfo
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- CN202083700U CN202083700U CN2011201284568U CN201120128456U CN202083700U CN 202083700 U CN202083700 U CN 202083700U CN 2011201284568 U CN2011201284568 U CN 2011201284568U CN 201120128456 U CN201120128456 U CN 201120128456U CN 202083700 U CN202083700 U CN 202083700U
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Abstract
The utility model provides an on-line total cadmium monitoring instrument for water quality by adopting an ultraviolet digestion method. The on-line total cadmium monitoring instrument comprises an embedded control system, a sampling pump system, a quantifying system, a multi-channel sample introduction system and an ultraviolet digestion and detection system, wherein the sampling pump system, the quantifying system, the multi-channel sample introduction system and the ultraviolet digestion and detection system are connected with one another in sequence through pipelines, a control program is preset in the embedded control system to control the operation of the sampling pump system, the quantifying system, the multi-channel sample introduction system and the ultraviolet digestion and detection system, a water sample to be detected enters the ultraviolet digestion and detection system through the multi-channel sample introduction system after the quantitative sampling of the sampling pump system and the quantifying system, the digestion reaction is accelerated after the water sample to be detected in the ultraviolet digestion and detection system is irradiated by an ultraviolet lamp, valences of cadmium are uniformized in the digestion reaction, and the on-line detection of total cadmium is realized. In the utility model, as the irradiation of ultraviolet light is added, the digestion reaction for valence uniformization can be greatly accelerated, real-time performance of on-line total cadmium detection is improved, energy consumption of equipment is reduced, and the problem of the influence on detection accuracy due to the complexing of organic matters and the cadmium is solved for the detection is carried out after the valences are uniformized.
Description
Technical field
The utility model belongs to on-line monitoring instrument technical field, specifically relates to a kind of total cadmium on-line monitoring of ultraviolet resolution method water quality instrument that is applicable to total cadmium content in the water quality.
Background technology
Because the harmfulness of heavy metal pollution is set up the heavy metal pollution prewarning system heavy metal pollution is monitored in real time, becomes urgent day by day, the demand to heavy metal on-line monitoring instrument also manifests day by day in recent years.The present basic dependence on import of heavy metal on-line monitoring instrument, import instrument price are comparatively expensive.For the height of breaking import instrument relies on, at the technical barrier of heavy metal on-line monitoring, many scientific and technical innovation enterprises are by strengthening the scientific research input, and a series of heavy metal on-line monitoring instrument release one after another, filled up domestic blank, the history of the foreign technology that is through with monopolization.
The quantity of the domestic installation of heavy metal on-line monitoring instrument is few, this mainly is because at present main dependence on import of heavy metal on-line monitoring instrument and import price costliness, and the user thinks all that in use this homemade quasi-instrument is not handy, it is too slow and accuracy of measurement is not high wherein to show the most distinct issues and be exactly measuring speed, simultaneously homemade heavy metal on-line monitoring instrument kind is more single, technology and quality with compare abroad that also there is a big difference.
The caused disease of heavy metal poisoning often has generation, and cadmium is a kind of common elements in the heavy metal, and the toxicity of sexavalence cadmium is very strong.Total cadmium refers to the content (summation that comprises various form cadmium concentrations) of total cadmium in the 1L water.If cadmium content is higher in the water, drunk then and can accumulate in vivo by the people, when long-term drinking will cause the generation of some diseases, therefore very important to the monitoring of total cadmium.
It is considerably less that the preceding whole world can produce the producer of heavy metal on-line monitoring instrument, and its technology is a polarography based on optics colourimetry, ion-selective electrode method and the anodic stripping voltammetry of standard mainly.Wherein the required amount of reagent of optics colourimetry of standard is bigger, cause the chemical reagent consumption amount big, use this instrument to increase many operation burdens to the user virtually, and this method The pretreatment process complexity, length consuming time in total metals mensuration process, real-time is very poor for monitoring water quality on line.Ion-selective electrode method limitation is bigger, owing to have optionally ion electrode itself at present with regard to seldom, so adopt this method can only satisfy the heavy metal on-line monitoring of few kind, and owing to be ion-selective electrode, so this mode can only be monitored the heavy metal ion in the water; Because the service condition of electrode itself can not contact strong acid, make that carrying out in the water total metals monitors and be subjected to very big constraint.The price of this this province of external electrode is very high and the life-span is very short (the general life-span is no more than half a year), so adopt the instrument of this method seldom to use at present.Anodic stripping voltammetry is a kind of newer measuring method, and originally this method mainly was used in laboratory measurement or emergency monitoring, and why being used in these occasions is because use the pre-service work in early stage of water sample to carry out by hand by the user in these cases; And for on-line monitoring, can only be used for that water quality is very limpid, content of beary metal is lower and heavy metal existing under the single situation of form at water.Accuracy very muddy when water sample itself or that measure when containing a large amount of impurity and even corrosive substance will descend greatly.
In order to realize that the total cadmium content in the water quality is controlled, international and domesticly formulated different standards respectively according to different water quality.The analytical approach that detects total cadmium has electrochemical process and chemical method.The cost of electrochemical process is higher, and the electrode vulnerable to pollution, the maintenance cost height.Chemical method has spectrophotometric method and titrimetry, owing to realize real time on-line monitoring, and titrimetry generally is used for lab analysis, is not suitable for the in-site measurement analysis, and can not the on-line analysis data.
Summary of the invention
The purpose of this utility model provides the total cadmium on-line monitoring of the ultraviolet resolution method water quality instrument of total cadmium concentration in a kind of accurately fast monitored water, realize the purpose of real time on-line monitoring, its monitoring accuracy can satisfy the monitoring requirement to total cadmium concentration in all kinds of water that State Bureau of Environmental Protection proposes.The utility model has solved accurately and the fast on-line monitoring problem to total cadmium in the water, and is applicable to various dissimilar water quality.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: the total cadmium on-line monitoring of a kind of ultraviolet resolution method water quality instrument comprises sampling pump system, quantitative system, the hyperchannel sampling system that embedded control system is connected with pipeline successively and ultraviolet is cleared up and detection system; Default control program in the described embedded control system, control sampling pump system, quantitative system, hyperchannel sampling system and ultraviolet are cleared up and detection system work, behind described sampling pump system and the quantitative system quantitative sampling, water sample to be measured enters through the hyperchannel sampling system that ultraviolet is cleared up and detection system, ultraviolet clear up with detection system in water sample to be measured through the irradiation of uviol lamp accelerate with cadmium carry out valence state unified clear up reaction, and carry out the online detection of total cadmium.
As preferably, be connected through the buffering pipeline between the quantity tube in described sampling pump systematic sampling pump and the quantitative system.This connected mode can guarantee can not enter into the sampling pump system when chemical reagent frees in and out quantity tube, thereby has protected sampling pump can not be subjected to the pollution of reagent and damage.
As preferably, described sampling pump systematic sampling pump is peristaltic pump or syringe pump, and sampling pump can positive and negative rotation and can be made and produce negative pressure or malleation in the quantity tube.
As preferably, the quantity tube in the described quantitative system is provided with and is used for light source and the optical receiver that quantitative some pairings are used.Light source and optical receiver occur in pairs, and the logarithm of light source and optical receiver and required quantitative volume number are corresponding one by one.By treating quantitative solution makes light emitted change to determine to the light intensity of optical receiver whether solution continues to flow or static when flowing in quantity tube, thus the volume of definite solution.
As preferably, described hyperchannel sampling system comprises the hyperchannel module, all is connected with solenoid valve via pipeline on each passage of hyperchannel module.Solenoid valve and hyperchannel module do not have the one design, connect by pipeline between the two, and the benefit of doing like this is that the solenoid valve on any one passage has damaged the solenoid valve use that can change separately and not influence on other passages, so that reduce user's maintenance cost.
As preferably, in the described hyperchannel sampling system, the hyperchannel module opens and closes the first titer pipeline, the second titer pipeline, the first reagent pipeline, the second reagent pipeline, waste liquid pipeline, the 3rd reagent pipeline, the 4th reagent pipeline and water sample pipeline to be measured through the solenoid valve selectivity.
As preferably, described ultraviolet clear up with detection system be an obturator, comprise digestion pool, the digestion pool two ends are provided with lower lock block, the digestion pool outside is provided with at least two uviol lamps, one side of digestion pool is provided with detection light source, relatively is provided with photodetector at the opposite side of digestion pool with detection light source.
As preferably, described ultraviolet clear up with detection system in, the bottom of digestion pool is provided with attemperating unit.
As preferably, described ultraviolet is cleared up with detection system and is comprised digestion pool, open and close pipeline connection by hyperchannel module selectivity between digestion pool and waste liquid pipeline, after the detection system detection finished, the hyperchannel module was opened the pipeline connection effluent discharge of digestion pool and waste liquid pipeline.
Ultraviolet is cleared up and is one with detection system and can carries out ultraviolet and clear up the device that simultaneously can carry out optical detection again, this device is an obturator, comprise lower lock block, uviol lamp, digestion pool, photodetector, detection light source, attemperating unit etc., wherein go up lower lock block and be used to seal digestion pool, uviol lamp is to be responsible for producing the light source that shines ultraviolet light in the digestion pool, at least two of the quantity of uviol lamp, detection light source is responsible for producing the light source that detects total cadmium content in the water sample, photodetector is responsible for responding to the intensity of detection light source, content according to total cadmium in the change calculations water sample of light intensity, attemperating unit is responsible for heating digestion pool to certain temperature, so that carry out corresponding chemical reaction.
Because the cadmium ion of different valence state easily forms chelate or complex compound with other negative ion in the water, these materials reduce the speed of chemistry redox reaction easily, thereby make the unified consumption long time that needs of the valence state of total cadmium before detecting.The utility model is realized the water sample chemical digesting by the ultraviolet resolution method, the irradiation that the adds ultraviolet light unified speed of clearing up reaction of valence state that can accelerate greatly, thus improved the real-time of the online detection of total cadmium, reduced the consumption of equipment simultaneously to the energy.
The mode of the utility model by chemistry redox is unified into a kind of valence state with the cadmium of all forms in the water and measures, solved the problem that influences accuracy of measurement after organism and the cadmium complexing.
Hyperchannel module and solenoid valve separate not the all-in-one-piece mode and carry out channel selecting in the utility model hyperchannel sampling system, in case this method has solved the normal operation that can come recovery system by the mode that provides for simple replacement of after solenoid valve on certain passage damages, and has saved cost and has reduced labour intensity than integral replacing hyperchannel sampling system.
Directly do not fuse between the utility model sampling pump system and the quantitative system; but connect by one section buffering pipeline; this connected mode is guaranteeing can not enter into the sampling pump system when chemical reagent frees in and out quantitative system, thereby has protected sampling pump can not be subjected to the pollution of reagent and damage.
The utility model ultraviolet clear up with detection system in digestion pool be the place of clearing up reaction simultaneously and detecting, the digestion pool outer wall is twining heater strip and temperature-sensing element in the attemperating unit, the two ends of digestion pool are realized the lower lock block sealing and are opened digestion pool by the break-make of electromagnetism, thereby guaranteed that chemical reagent can free in and out digestion pool.
Description of drawings
Fig. 1 is a kind of pipeline structure synoptic diagram of the present utility model;
Fig. 2 is a kind of theory structure synoptic diagram of the present utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: referring to Fig. 1 and Fig. 2, the utility model comprises the sampling pump system that embedded control system is connected with pipeline successively, quantitative system, hyperchannel sampling system and ultraviolet are cleared up and detection system, default control program in the embedded control system wherein, control sampling pump system, quantitative system, hyperchannel sampling system and ultraviolet are cleared up and detection system work, behind sampling pump system and the quantitative system quantitative sampling, water sample to be measured enters through the hyperchannel sampling system that ultraviolet is cleared up and detection system, ultraviolet clear up with detection system in water sample to be measured through the irradiation of uviol lamp accelerate with cadmium carry out valence state unified clear up reaction, and carry out the online detection of total cadmium.Sampling pump systematic sampling pump 1 is peristaltic pump or syringe pump, can positive and negative rotation and can make and produce negative pressure or malleation in the quantity tube, be connected through cushioning pipeline 2 between the quantity tube 3 in sampling pump 1 and the quantitative system.Quantity tube 3 is provided with and is used for light source 4 and the optical receiver 7 that quantitative some pairings are used, light source and optical receiver occur in pairs, and the logarithm of light source and optical receiver and required quantitative volume number are corresponding one by one, by treating quantitative solution makes light emitted change to determine to the light intensity of optical receiver whether solution continues to flow or static when flowing in quantity tube, thus the volume of definite solution.The hyperchannel sampling system comprises hyperchannel module 5, all be connected with solenoid valve 6 via pipeline on each passage of hyperchannel module 5, hyperchannel module 5 opens and closes the first titer pipeline 14, the second titer pipeline 15, the first reagent pipeline 16, the second reagent pipeline 17, waste liquid pipeline 18, the 3rd reagent pipeline 19, the 4th reagent pipeline 20 and water sample pipeline 21 to be measured through solenoid valve 6 selectivity.Ultraviolet clear up with detection system be an obturator, comprise digestion pool 10, digestion pool 10 two ends are provided with lower lock block 8, digestion pool 10 outsides are provided with at least two uviol lamps 9, one side of digestion pool 10 is provided with detection light source 12, relatively be provided with photodetector 11 with detection light source 12 at the opposite side of digestion pool 10, the bottom of digestion pool 10 is provided with attemperating unit 13,18 of digestion pool 10 and waste liquid pipelines pass through hyperchannel module 5 selectivity and open and close pipeline connection, after the detection system detection finishes, the pipeline connection effluent discharge that hyperchannel module 5 is opened digestion pools 10 and waste liquid pipeline 18.
Principle of work of the present utility model is as follows: the sampling pump system produces negative pressure, to suck in the quantity tube via solenoid valve and hyperchannel module through the water sample that simple filtration is handled, the position that the variation of light signal generating comes the perception water sample to arrive during by the pipeline between light source and the optical receiver according to water sample, and then realize quantitatively measuring of water sample, the sampling pump system produces malleation after quantitatively finishing, with water sample via hyperchannel module and solenoid valve be pushed into ultraviolet clear up with detection system in digestion pool in; Then profit uses the same method and also is taken into first reagent in the digestion pool, begin digestion pool is heated by attemperating unit then, UV-irradiation digestion pool quickening is simultaneously cleared up reaction and is carried out, begin cooling after the reaction by 3-10 minutes clear up, also be taken in the digestion pool second reagent, the 3rd reagent respectively then, begin to carry out optical detection subsequently, measure the content of total cadmium in the water according to the signal intensity of photodetector.Before detecting actual water sample, replace water sample to measure respectively first titer and second titer by above-mentioned flow process respectively earlier, be used for the calculation correction coefficient.All above-mentioned measuring processes all have embedded control system to control automatically to finish, embedded control system provides the man-machine conversation window simultaneously, realize the system configuration of total cadmium on-line monitoring instrument and the parameter configuration in the measuring process by keyboard, mouse or touch-screen, thereby realize the full-automatic reliability service of the total cadmium on-line monitoring instrument under the unmanned.
At last, should be pointed out that above embodiment only is the more representational example of the utility model.Obviously, the utility model is not limited to the foregoing description, and many distortion can also be arranged.Every foundation technical spirit of the present utility model all should be thought to belong to protection domain of the present utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (10)
1. the total cadmium on-line monitoring of ultraviolet resolution method water quality instrument is characterized in that described monitor comprises sampling pump system, quantitative system, the hyperchannel sampling system that embedded control system is connected with pipeline successively and ultraviolet is cleared up and detection system; Described embedded control system is controlled sampling pump system, quantitative system, hyperchannel sampling system and ultraviolet and is cleared up and detection system work, behind described sampling pump system and the quantitative system quantitative sampling, water sample to be measured enters through the hyperchannel sampling system that ultraviolet is cleared up and detection system, ultraviolet clear up with detection system in water sample to be measured through the irradiation of uviol lamp accelerate with cadmium carry out valence state unified clear up reaction, and carry out the online detection of total cadmium.
2. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 1 water quality instrument, it is characterized in that being connected through buffering pipeline (2) between the quantity tube (3) in described sampling pump systematic sampling pump (1) and the quantitative system.
3. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 2 water quality instrument, it is characterized in that described sampling pump systematic sampling pump (1) is peristaltic pump or syringe pump.
4. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 2 water quality instrument, it is characterized in that the quantity tube (3) in the described quantitative system is provided with light source (4) and the optical receiver (7) that is used for quantitative some pairings uses.
5. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 1 water quality instrument, it is characterized in that described hyperchannel sampling system comprises hyperchannel module (5), all is connected with solenoid valve (6) via pipeline on each passage of hyperchannel module (5).
6. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 5 water quality instrument, it is characterized in that in the described hyperchannel sampling system that hyperchannel module (5) opens and closes the first titer pipeline (14), the second titer pipeline (15), the first reagent pipeline (16), the second reagent pipeline (17), waste liquid pipeline (18), the 3rd reagent pipeline (19), the 4th reagent pipeline (20) and water sample pipeline to be measured (21) through solenoid valve (6) selectivity.
7. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 1 water quality instrument, it is characterized in that described ultraviolet clear up with detection system be an obturator, comprise digestion pool (10), digestion pool (10) two ends are provided with lower lock block (8), digestion pool (10) outside is provided with at least two uviol lamps (9), one side of digestion pool (10) is provided with detection light source (12), relatively is provided with photodetector (11) at the opposite side of digestion pool (10) with detection light source (12).
8. according to claim 1 or the total cadmium on-line monitoring of 7 described ultraviolet resolution method water quality instrument, it is characterized in that described ultraviolet clear up with detection system in, the bottom of digestion pool (10) is provided with attemperating unit (13).
9. according to the total cadmium on-line monitoring of the described ultraviolet resolution method of claim 7 water quality instrument, it is characterized in that opening and closing pipeline connection by hyperchannel module (5) selectivity between described digestion pool (10) and waste liquid pipeline (18), after the detection system detection finished, hyperchannel module (5) was opened the pipeline connection effluent discharge of digestion pool (10) and waste liquid pipeline (18).
10. the total cadmium on-line monitoring of described according to Claim 8 ultraviolet resolution method water quality instrument, it is characterized in that opening and closing pipeline connection by hyperchannel module (5) selectivity between described digestion pool (10) and waste liquid pipeline (18), after the detection system detection finished, hyperchannel module (5) was opened the pipeline connection effluent discharge of digestion pool (10) and waste liquid pipeline (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011201284568U CN202083700U (en) | 2011-04-27 | 2011-04-27 | On-line total cadmium monitoring instrument for water quality by adopting ultraviolet digestion method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201284568U CN202083700U (en) | 2011-04-27 | 2011-04-27 | On-line total cadmium monitoring instrument for water quality by adopting ultraviolet digestion method |
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| CN202083700U true CN202083700U (en) | 2011-12-21 |
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| CN2011201284568U Expired - Fee Related CN202083700U (en) | 2011-04-27 | 2011-04-27 | On-line total cadmium monitoring instrument for water quality by adopting ultraviolet digestion method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548008A (en) * | 2015-12-30 | 2016-05-04 | 深圳市绿恩环保技术有限公司 | Online detecting device for cadmium in water |
-
2011
- 2011-04-27 CN CN2011201284568U patent/CN202083700U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548008A (en) * | 2015-12-30 | 2016-05-04 | 深圳市绿恩环保技术有限公司 | Online detecting device for cadmium in water |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20140427 |