CN209247624U - A kind of water quality mercury online auto monitoring system - Google Patents
A kind of water quality mercury online auto monitoring system Download PDFInfo
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- CN209247624U CN209247624U CN201821897021.8U CN201821897021U CN209247624U CN 209247624 U CN209247624 U CN 209247624U CN 201821897021 U CN201821897021 U CN 201821897021U CN 209247624 U CN209247624 U CN 209247624U
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Abstract
The utility model relates to a kind of water quality mercury online auto monitoring systems.The water quality mercury online auto monitoring system includes control unit and sequentially connected sample injection unit, reaction member, detection unit, control unit is for controlling sample injection unit, reaction member and detection unit work, sample injection unit is used to input water sample to reaction member, digestion solution and reducing agent, reaction member is for being converted to nonvalent mercury for the mercury of different valence state in water sample and being enriched with, including reaction flask, enrichment pipe and air pump, reaction flask is connect with sample injection unit and enrichment pipe respectively by triple valve, enrichment pipe connects air pump, air pump is connect with reaction flask and detection unit respectively by triple valve, detection unit is used to detect the nonvalent mercury of reaction member enrichment.The water quality mercury online auto monitoring system is controlled by control unit, is guaranteed that monitoring process is automatic, continuous, is realized water quality mercury online auto monitoring requirement.
Description
Technical field
The utility model generally relates to water quality monitoring technical field, and in particular to a kind of water quality mercury online auto monitoring system
System.
Background technique
There are two types of existing mercury detection technique is usual: atomic absorption method and atomic fluorescence method.The cardinal principle of atomic absorption method
For based on element mercury at room temperature, under conditions of not heating, so that it may be volatilized into mercury vapour, and to the ultraviolet light of wavelength 253.7nm
With strong absorption, in a certain range, the concentration and absorption value of mercury are directly proportional, meet Beer law.Atom is glimmering
Light method is grown up on the basis of atomic absorption method, is a kind of emission spectrometry.Mercury lamp emission light beam passes through by water sample
When the mercuryvapour cloud of contained mercury element conversion, mercury atom absorbs the energy of specific resonance wave, it is made to be energized into upper state by ground state,
And when the atom being excited returns to ground state, fluorescence will be issued, by measuring the size of fluorescence intensity, mercury in water sample can be measured
Content.
The method more mature at present applied to the detection of water quality mercury is laboratory method, and online auto monitoring equipment does not have substantially
Have.Laboratory national standard method is atomic fluorescence method, and method detailed can refer to HJ694-2014 " water quality mercury, arsenic, selenium, bismuth and antimony
Measurement atomic fluorescence method ".
The prior art and method are not able to satisfy live automatic on-line monitoring requirements, are not able to satisfy the following water quality mercury on-line monitoring
Environmental requirement.
Utility model content
Utility model aims to solve the automatic monitoring problems of mercury concentration in water quality.
The utility model provides a kind of water quality mercury online auto monitoring system, including control unit and it is sequentially connected into
Sample unit, reaction member, detection unit, described control unit is for controlling the sample injection unit, the reaction member and described
Detection unit work, the sample injection unit are used for single to reaction member input water sample, digestion solution and reducing agent, the reaction
Member is for being converted to nonvalent mercury for the mercury of different valence state in the water sample and being enriched with comprising reaction flask, enrichment pipe and air pump, institute
Reaction flask to be stated to connect with the sample injection unit and the enrichment pipe respectively by triple valve, the enrichment pipe connects the air pump,
The air pump is connect with the reaction flask and the detection unit respectively by triple valve, and the detection unit is described for detecting
The nonvalent mercury of reaction member enrichment.
Preferably, according to above-mentioned system, the sample injection unit includes water sample pipeline, resolution liquid pipeline, reducing agent pipeline
And liquid delivery pump, the water sample pipeline, the resolution liquid pipeline and the reducing agent pipeline respectively with the liquid delivery pump
Connection, the liquid delivery pump connect the reaction flask of the reaction member.
It is highly preferred that the liquid delivery pump is metering peristaltic pump or sample introduction metering pump according to above-mentioned system.
Or it is highly preferred that the water sample pipeline is connected with the resolution liquid pipeline by triple valve according to above-mentioned system
The liquid delivery pump.
Preferably, according to above-mentioned system, the reaction member further includes tapping valve, and the tapping valve connects the reaction
Bottle.
It or preferably, further include analytical unit according to above-mentioned system, the testing number for being obtained to the detection unit
According to being analyzed to obtain the mercury concentration in the water sample.
The method being monitored using above system, comprising:
Sample introduction: the water sample of certain volume is quantitatively extracted by the sample injection unit；
Resolution: it is connected to the reaction flask of the sample injection unit and the reaction member, makes the water sample from the sample injection unit
Enter the reaction flask with digestion solution, the mercury of different valence state in water sample is cleared up into bivalent mercury；
Reduction: it is connected to the reaction flask of the sample injection unit and the reaction member, makes the reduction from the sample injection unit
Agent enters the reaction flask, and the bivalent mercury is reduced into nonvalent mercury；
Enrichment: the reaction flask, enrichment pipe and air pump for being connected to the reaction member form closed loop, make enrichment pipe enrichment institute
State nonvalent mercury；
Release: be connected to the reaction member enrichment pipe and the detection unit, heat the enrichment pipe, make enrichment zero
Valence mercury is released into the detection unit；
Detection: the detection unit detects the nonvalent mercury from the enrichment pipe.
Preferably, according to above-mentioned method, step " enrichment " is repeatedly enrichment.
Or preferably, according to above-mentioned method, step " detection " is to detect the nonvalent mercury using atomic absorption method, is obtained
Mercury concentration curve.
It is highly preferred that further including step " analysis " after step " detection " according to above-mentioned method comprising: the analysis
The mercury concentration curve that unit is obtained according to the detection unit carries out the mass value that the nonvalent mercury is calculated, which removes
With the volume of water sample in step " sample introduction ", the mercury concentration value of the water sample can be obtained.
The water quality mercury online auto monitoring system of the utility model is controlled by control unit, guarantees that monitoring process is automatic, connects
It is continuous, realize water quality mercury online auto monitoring requirement.
Detailed description of the invention
Fig. 1 is a kind of embodiment of the utility model water quality mercury online auto monitoring system.
Specific embodiment
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when the embodiment of the utility model and its various aspects.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limitations of the present invention.
If not otherwise indicated, triple valve and tapping valve are in off state in text.
As shown in Figure 1, a kind of water quality mercury online auto monitoring system of the utility model includes that control unit (is not drawn in figure
Out), analytical unit (being not drawn into figure) and sequentially connected sample injection unit 1, reaction member 2, detection unit 3.Control unit is used
In control sample injection unit 1, reaction member 2, detection unit 3 and analytical unit work, guarantee that monitoring process is automatic, continuous, tool
Body can be PLC.
Sample injection unit 1 includes water sample pipeline 11, resolution liquid pipeline 12, cleaning liquid pipeline 13, reducing agent pipeline 14 and liquid
Delivery pump 15.Water sample pipeline 11 and resolution liquid pipeline 12 pass through triple valve (valve 2) and triple valve (valve 1) connection liquid delivery pump
15.It cleans liquid pipeline 13 and reducing agent pipeline 14 and liquid delivery pump 15 is connected by triple valve (valve 3) and triple valve (valve 1).Liquid
Body delivery pump 15 concretely measures peristaltic pump or sample introduction metering pump.
Reaction member 2 includes reaction flask 21, enrichment pipe 22, air pump 23, zero air pipe 24 and tapping valve (valve 7).Reaction flask
21 are separately connected the liquid delivery pump 15 and enrichment pipe 22 of sample injection unit 1 by triple valve (valve 4).Enrichment pipe 22 passes through triple valve
(valve 5) connects triple valve (valve 4) and zero air pipe 24.Enrichment pipe 22 connects air pump 23.Air pump 23 passes through triple valve (valve 6) difference
It is connect with reaction flask 21 and detection unit 3.Tapping valve (valve 7) connects reaction flask 21.
It is main comprising steps of resolution, cleaning, reduction, enrichment, inspection that online auto monitoring is carried out to water quality mercury using the system
Survey, analyze etc..
Specific method includes the following steps:
Sample introduction: control unit controls opening valve 2, valve 1 and liquid delivery pump 15, passes through 15 quantitative functions of liquid delivery pump
Quantitatively extract the water sample of certain volume.
Resolution: control unit controls opening valve 2, valve 1, liquid delivery pump 15 and valve 4, and water sample and digestion solution is made to enter reaction
Bottle 21 closes valve 2 after obtaining appropriate digestion solution by the quantitative function of liquid delivery pump 15, in reaction flask 21 by water sample not
Mercury with valence state is cleared up into bivalent mercury.
Cleaning: control unit controls opening valve 3, makes remaining water sample in cleaning solution detergent line.It is avoided to tie sampling
Fruit impacts or interferes.
Reduction: control unit controls opening valve 3, so that reducing agent is entered reaction flask 21, passes through the quantitative function of liquid delivery pump
Valve 3, valve 1, liquid delivery pump 15 and valve 4 are closed after excessive reductant can be obtained, bivalent mercury is reduced into nonvalent mercury, wherein excessive
Reducing agent guarantees that reduction is abundant.
Enrichment: control unit controls opening valve 4, valve 5 and valve 6, closes reaction flask 21, enrichment pipe 22 and the formation of air pump 23
Ring, enrichment pipe more than 22 times nonvalent mercuries of the enrichment from reaction flask 21 guarantee that enrichment is complete.3~5min of enrichment time closes valve 4.
Release: control unit controls opening valve 5 and valve 6, and enrichment pipe 22 is made to receive zero gas from zero air pipe 24 and company
Logical detection unit 3, heats enrichment pipe 22, releases the nonvalent mercury of enrichment and enters detection unit 3 through air pump 23, to nonvalent mercury
After detection unit 3, valve 5 and valve 6 are closed.Detection: control unit controls the detection of detection unit 3 from enrichment pipe 22
Nonvalent mercury.Blob detection specially is carried out to nonvalent mercury.Mercury after concretely parsing enters detection unit 3 with zero gas, and detection is single
The optical signal that member 3 issues encounters mercury and is partially absorbed.Detection unit 3 receives the optical signal after being partially absorbed, and is converted into electricity
Signal.The variation of the corresponding mercury concentration value of the variation of the electric signal.Mercury concentration distribution in carrier gas is low distribution after preceding low intermediate height
The mercury concentration display interface of state, detection unit 3 will form the peak-to-peak signal (i.e. change in electric) of a sine wave, and peak shape figure is
The instantaneous concentration value figure of mercury is shown in measurement process.
Analysis: analytical unit carries out data operation to the peak shape figure of detection process.Wherein, zero throughput is in detection process
Constant given value carries out integral read group total to peak shape figure, and parameter includes: mercury instantaneous concentration value, zero throughput, the time of integration,
Three parameters are given value, i.e. the product of three parameters of integral summation, and the result of product is the mass value of the measurement period mercury；With
The mercury concentration value of the water sample can be obtained divided by volume of water sample value during sample introduction in the mass value.
Drain: after single monitoring cycle, control unit opening valve 7 carries out emptying drain to reaction flask 21.
Finally, it should be noted that obviously, above-described embodiment is merely examples for clearly illustrating the present invention,
And it does not limit the embodiments.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And thus
Changes and variations that derived from still in the protection scope of the utility model among.
Claims (6)
1. a kind of water quality mercury online auto monitoring system, which is characterized in that including control unit and sequentially connected sample injection unit,
Reaction member, detection unit,
Described control unit works for controlling the sample injection unit, the reaction member and the detection unit,
The sample injection unit is used for reaction member input water sample, digestion solution and reducing agent,
The reaction member is used to that the mercury of different valence state in the water sample to be converted to nonvalent mercury and is enriched with, including reaction flask, richness
Collector and air pump, the reaction flask are connect with the sample injection unit and the enrichment pipe respectively by triple valve, the enrichment pipe
The air pump is connected, the air pump is connect with the reaction flask and the detection unit respectively by triple valve,
The detection unit is used to detect the nonvalent mercury of the reaction member enrichment.
2. system according to claim 1, which is characterized in that the sample injection unit include water sample pipeline, resolution liquid pipeline,
Reducing agent pipeline and liquid delivery pump,
The water sample pipeline, the resolution liquid pipeline and the reducing agent pipeline are connect with the liquid delivery pump respectively,
The liquid delivery pump connects the reaction flask of the reaction member.
3. system according to claim 2, which is characterized in that the liquid delivery pump is metering peristaltic pump or sample introduction metering
Pump.
4. system according to claim 2, which is characterized in that the water sample pipeline and the resolution liquid pipeline pass through threeway
Valve connects the liquid delivery pump.
5. system according to claim 1, which is characterized in that the reaction member further includes tapping valve, the tapping valve
Connect the reaction flask.
6. system according to claim 1, which is characterized in that further include analytical unit, for being obtained to the detection unit
The detection data obtained is analyzed to obtain the mercury concentration in the water sample.
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| CN201821897021.8U CN209247624U (en) | 2018-11-16 | 2018-11-16 | A kind of water quality mercury online auto monitoring system |
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| CN201821897021.8U CN209247624U (en) | 2018-11-16 | 2018-11-16 | A kind of water quality mercury online auto monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307656A (en) * | 2018-11-16 | 2019-02-05 | 北京雪迪龙科技股份有限公司 | A kind of water quality mercury online auto monitoring system and its method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307656A (en) * | 2018-11-16 | 2019-02-05 | 北京雪迪龙科技股份有限公司 | A kind of water quality mercury online auto monitoring system and its method |
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