CN103616269A - Mercury monitoring method - Google Patents
Mercury monitoring method Download PDFInfo
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- CN103616269A CN103616269A CN201310625570.5A CN201310625570A CN103616269A CN 103616269 A CN103616269 A CN 103616269A CN 201310625570 A CN201310625570 A CN 201310625570A CN 103616269 A CN103616269 A CN 103616269A
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Abstract
The invention discloses a mercury monitoring method which comprises an enrichment desorption unit and a mercury analysis measurement device. The mercury monitoring method specially comprises the following steps: firstly, introducing a sample gas to the enrichment desorption unit for enriching mercury; secondly, purging a system pipeline by using a dry gas, then heating the enrichment desorption unit to ensure that the mercury enriched inside the enrichment desorption unit is desorbed and released; and finally, introducing a carrier gas to the enrichment desorption unit, and conveying the released mercury to the mercury analysis measurement device for desorption and measurement. According to the mercury monitoring method provided by the invention, after mercury enrichment is finished, before desorption and measurement are started, the system pipeline is purged, thus water remained in the pipeline system can be discharged in a purging process, and a water remover part in the mercury monitoring device in the prior art can be removed, the carrier gas carrying the desorbed mercury does not need to pass through the water remover, the loss of the mercury when the water is removed from the carrier gas can be reduced, the interference problem of water to mercury measurement is avoided, the measurement precision is improved, and the use cost is saved.
Description
Technical field
The present invention relates to environment measuring technical field, particularly a kind of mercury monitoring method.
Background technology
Along with industrial expansion, heavy metal is in the widespread use of the aspect such as industrial, agriculture, medical, and the problem of environmental pollution that all kinds of heavy metals cause is day by day serious, and the harm that heavy metal brings environment and the mankind more and more causes general concern.
It is large that heavy metal has toxicity, is difficult for by metabolism in environment, and be easily bioaccumulation and have the features such as biological amplification, to environment and biological harm, be far-reaching, wherein especially with the toxicity maximum column of mercury and mercuric compounds, occupy first of each heavy metal toxicity.Mercury exists with liquid form at normal temperatures, and the inorganic mercury after gasification can be circulated to global any corner along with general circulation, is a kind of global polluter.And the valence state mercury that man-made pollution source produces enters after atmosphere in discharge, can, in conjunction with airborne moisture, dust, drop among ground and water body, by a series of effects of microorganism, transform into the extremely strong methyl mercury of toxicity, local ecologic environment and population are caused to serious impact.Therefore, online mercury monitoring method is of great significance, and prior art generally realizes the on-line monitoring of mercury in the following manner.
Because the content of mercury in environment is lower, the mercury detector direct-detection sample gas of prior art is difficult to realize the detection of mercury, therefore the mercury in environment is carried out to enrichment in prior art operated by rotary motion enrichment desorb unit and desorb is processed.
Please refer to Fig. 1, Fig. 1 is the process flow diagram of a kind of mercury monitoring method of prior art.
Mercury monitoring method step is specially: first make the sample gas that will detect first by enrichment desorb unit, the mercury in sample gas is enriched in enrichment desorb unit, through after a period of time, enrichment is complete; Then enrichment desorb unit is heated, allow the mercury of enrichment discharge completely, after mercury discharges, then pass into carrier gas in enrichment desorb unit, carrier gas enters mercury analysing and measuring instrument by carrying the mercury discharging, and carries out analyzing and testing.
Conventionally, while entering measuring state after desorb, the gas remaining in pipeline contains certain humidity conventionally, and humidity brings error can to the measurement of mercury analysis measuring device, affects measuring accuracy.In order to alleviate above-mentioned impact as far as possible, prior art generally adopts dehydrator, and dehydrator is arranged on before the import of mercury analysis measuring device, and carrier gas enters mercury analysis measuring device after described dehydrator.
But when utilizing said method to remove the moisture in carrier gas, the water that condensation goes out can carry a certain amount of measured object composition, that is to say that mercury has a small amount of loss, has had a strong impact on the accuracy of detection to mercury content in sample gas.
Therefore, how to provide a kind of mercury monitoring method, this monitoring method can reduce the measuring error to mercury in sample gas as far as possible, is those skilled in that art's technical matterss urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is for providing a kind of mercury monitoring method, and this monitoring method can reduce the measuring error to mercury in sample gas as far as possible.
For solving the problems of the technologies described above, the invention provides a kind of mercury monitoring method, comprise enrichment desorb unit, mercury analysis measuring device, the method concrete steps are as follows:
S1, logical sample gas carry out mercury enrichment in enrichment desorb unit;
S2, utilize dry gas to purge system pipeline;
S3, heating enrichment desorb unit, discharge the mercury desorb of its inner enrichment;
S4, logical carrier gas, in described enrichment desorb unit, are delivered to mercury analysis measuring device by the mercury of release and carry out desorb measurement.
Preferably, gas purging circulation path described in described step S2 is identical with the desorb measuring route of carrier gas described in described step S4.
Preferably, the described gas in step S2 and the carrier gas in described step S4 are from same source of the gas.
Preferably, the gas in described step S2 utilizes the aspiration pump that extracts sample gas in mercury monitoring device to complete the purging to system pipeline.
Preferably, also comprise reversal valve, when described reversal valve is during in the first working position, described sample gas is communicated with described enrichment desorb unit and described aspiration pump, carries out step S1; When described reversal valve is during in the second duty, described carrier gas is communicated with described enrichment desorb unit, described pump analysis component and described aspiration pump, carries out step S2; When described reversal valve is during in the 3rd working position, described carrier gas is communicated with described enrichment desorb unit, described pump analysis component, carries out step S4.
Preferably, described reversal valve comprises the first reversal valve and the second reversal valve, is arranged at respectively air intake opening and the position, gas outlet of described enrichment desorb unit.
Preferably, also comprise that, for removing the exsiccator of described carrier gas water vapour, described carrier gas enters described enrichment desorb unit after described exsiccator.
Preferably, also comprise the MCU that is electrically connected to described the first reversal valve, described the second reversal valve and described aspiration pump, the duty of described reversal valve and described aspiration pump is controlled by described MCU.
Compared with prior art, after in mercury monitoring method of the present invention, mercury enrichment finishes, before desorb measurement starts, system pipeline is purged, purge can, by the moisture emptying of pipe system remnants, guarantee that desorb test process, without moisture interference, increases the accuracy of measuring like this.
And, this technological means can be removed the dehydrator parts in mercury monitoring device in prior art, the carrier gas of carrying mercury after desorb is without through dehydrator, the loss of mercury and avoid the interference problem of moisture to mercury measurement in the time of can reducing carrier gas and remove moisture, improve measuring accuracy, and saved use cost.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a kind of mercury monitoring method of prior art;
Fig. 2 is the process flow diagram of an embodiment of the present invention mercury monitoring method;
Fig. 3 is the structured flowchart of mercury monitoring device in an embodiment of the present invention.
Wherein, in Fig. 3, the one-to-one relationship between Reference numeral and component names is as follows:
10 sample gas origins, 12 enrichment desorb unit, 13 mercury analysis to measure parts, 14 air extractors, 15 first reversal valves, 16 second reversal valves, 17MCU, 18 carrier gas sources of the gas.
Embodiment
Core of the present invention is for providing a kind of mercury monitoring method, and this monitoring method can reduce the measuring error to mercury in sample gas as far as possible.
In order to make those skilled in the art understand better technical scheme of the present invention, below in conjunction with device, method and the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is the process flow diagram of an embodiment of the present invention mercury monitoring method; Fig. 3 is the structured flowchart of mercury monitoring device in an embodiment of the present invention; Wherein, in Fig. 3, solid line represents sample current path footpath, and dotted line represents carrier gas circulation path, and dot-and-dash line represents operation circuit.
The invention provides a kind of mercury monitoring method, the enforcement of mercury monitoring method depends on mercury monitoring device, mercury monitoring device generally includes enrichment desorb unit 12, mercury analysis measuring device 13, sample gas source of the gas 10, carrier gas source of the gas 18, sample gas source of the gas 10 provides test sample gas to be checked, enrichment desorb unit 12 is for the enrichment of sample gas mercury and the desorb after mercury enrichment, the mercury that carrier gas source of the gas 18 is mainly provided for providing carrier gas, carrier gas to carry desorb in enrichment desorb unit 12 enters mercury analysis measuring device 13; The method concrete steps are as follows:
S1, logical sample gas carry out mercury enrichment in enrichment desorb unit 12;
S2, utilize dry gas to purge system pipeline; Dry gas can be the gas of stable in properties under the normal temperature such as nitrogen or high temperature.
S3, heating enrichment desorb unit 12, discharge the mercury of its inner enrichment;
S4, logical carrier gas, in enrichment desorb unit 12, are delivered to mercury analysis measuring device 13 by the mercury of release.
Compared with prior art, after in mercury monitoring method of the present invention, mercury enrichment finishes, before desorb measurement starts, system pipeline is purged, purge can, by the moisture emptying of pipe system remnants, guarantee that desorb test process, without moisture interference, increases the accuracy of measuring like this.
And, this technological means can be removed the dehydrator parts in mercury monitoring device in prior art, the carrier gas of carrying mercury after desorb is without through dehydrator, the loss of mercury and avoid the interference problem of moisture to mercury measurement in the time of can reducing carrier gas and remove moisture, improve measuring accuracy, and saved use cost.
Certainly, desorb and the enrichment of mercury can be realized in enrichment desorb unit 12 by associated components is rationally set, at this, be not described further.
A kind of preferred embodiment in, the carrier gas for the gas that purges and step S4 in step S2, from same source of the gas, is conducive to the simplification of system like this, saves cost.
Particularly, the path that in above-mentioned steps S2, in the path of purge gas and step S4, carrier gas desorb is measured, gas flows out from the outlet of carrier gas source of the gas 18, after enrichment desorb unit 12 and mercury analysis measuring device 13, flow to outside.Like this can be thoroughly by the moisture removal on carrier gas path.
In order to improve purging efficiency, the gas in described step S2 utilizes the air extractor 14 that extracts sample gas in mercury monitoring device to complete the purging to system pipeline, takes full advantage of like this equipment in mercury monitoring device, avoids extra setting.
In order to realize robotization, control, mercury monitoring device can also comprise reversal valve, and when described reversal valve is during in the first working position, described sample gas is communicated with described enrichment desorb unit 12 and described air extractor 14, carries out step S1; When described reversal valve is during in the second duty, described carrier gas is communicated with described enrichment desorb unit 12, described pump analysis component and described air extractor 14, carries out step S2; When described reversal valve is during in the 3rd working position, described carrier gas is communicated with described enrichment desorb unit 12, described pump analysis component, carries out step S4.
Particularly, reversal valve can comprise the first reversal valve 15 and the second reversal valve 16, be arranged at respectively air intake opening and the position, gas outlet of enrichment desorb unit 12, the first reversal valve 15 and the second reversal valve 16 can be two-bit triplet solenoid valve, can certainly be the reversal valve of other form, as long as can realize above-mentioned technique effect.Enrichment desorb unit 12 is communicated with air extractor 14; When the second reversal valve 16 is during in the second duty, described enrichment desorb unit 12 is communicated with mercury analysis measuring device 13, so that carrier gas is delivered to mercury analysis measuring device 13 by the mercury of release.
For the accuracy that further guarantees to measure, mercury monitoring device can also comprise that, for removing the exsiccator of carrier gas water vapour, carrier gas enters described enrichment desorb unit 12 after described exsiccator.
Particularly, mercury monitoring device in the various embodiments described above can also comprise the MCU17 that is electrically connected to the first reversal valve 15, described the second reversal valve 16 and air extractor 14, the duty of reversal valve and described air extractor 14 is controlled by described MCU17, in this embodiment without control assembly is additionally set, on original system basis, increase control module and can realize above-mentioned technique effect herein, can simplification system arrange, save cost.
Certainly, also can increase extra control assembly and realize above-mentioned technique effect herein.
The otherwise data of mercury pick-up unit please refer to prior art, and therefore not to repeat here.
Above a kind of mercury monitoring method provided by the present invention is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (8)
1. a mercury monitoring method, comprises enrichment desorb unit (12), mercury analysis to measure parts (13), it is characterized in that, the method concrete steps are as follows:
S1, logical sample gas carry out mercury enrichment in enrichment desorb unit (12);
S2, utilize dry gas to purge system pipeline;
S3, heating enrichment desorb unit (12), discharge the mercury desorb of its inner enrichment;
S4, logical carrier gas, in described enrichment desorb unit (12), are delivered to mercury analysis to measure parts (13) by the mercury of release and measure.
2. mercury monitoring method as claimed in claim 1, is characterized in that, gas purging circulation path described in described step S2 is identical with the desorb measuring route of carrier gas described in described step S4.
3. mercury monitoring method as claimed in claim 2, is characterized in that, the described gas in step S2 and the carrier gas in described step S4 are from same source of the gas.
4. mercury monitoring method as claimed in claim 3, is characterized in that, the gas in described step S2 utilizes the air extractor (14) that extracts sample gas in mercury monitoring device to complete the purging to system pipeline.
5. mercury monitoring method as claimed in claim 4, is characterized in that, also comprises reversal valve, and when described reversal valve is during in the first working position, described sample gas is communicated with described enrichment desorb unit (12) and described air extractor (14), carries out step S1; When described reversal valve is during in the second duty, described carrier gas is communicated with described enrichment desorb unit (12), described pump analysis component and described air extractor (14), carries out step S2; When described reversal valve is during in the 3rd working position, described carrier gas is communicated with described enrichment desorb unit (12), described pump analysis component, carries out step S4.
6. mercury monitoring method as claimed in claim 5, is characterized in that, described reversal valve comprises the first reversal valve (15) and the second reversal valve (16), is arranged at respectively air intake opening and the position, gas outlet of described enrichment desorb unit (12).
7. mercury monitoring method as claimed in claim 1, is characterized in that, also comprises that described carrier gas enters described enrichment desorb unit (12) after described exsiccator for removing the exsiccator of described carrier gas water vapour.
8. mercury monitoring method as claimed in claim 6, it is characterized in that, also comprise the MCU that is electrically connected to described the first reversal valve (15), described the second reversal valve (16) and described air extractor (14), the duty of described reversal valve and described air extractor (14) is controlled by described MCU.
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| CN201310625570.5A CN103616269A (en) | 2013-11-28 | 2013-11-28 | Mercury monitoring method |
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| CN201310625570.5A CN103616269A (en) | 2013-11-28 | 2013-11-28 | Mercury monitoring method |
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Cited By (5)
| 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 |
| CN109342131A (en) * | 2018-11-16 | 2019-02-15 | 北京雪迪龙科技股份有限公司 | A kind of Low Concentration Mercury detection system and detection method |
| CN110595859A (en) * | 2019-10-29 | 2019-12-20 | 长沙开元弘盛科技有限公司 | Water removal method, analyzer and water removal device thereof |
| CN112649457A (en) * | 2021-01-15 | 2021-04-13 | 钢研纳克检测技术股份有限公司 | X-ray fluorescence rapid analysis method for trace heavy metal mercury in solid sample |
| CN113092691A (en) * | 2021-05-06 | 2021-07-09 | 上海烟草集团有限责任公司 | Device for detecting moisture content in gas |
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| 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 |
| CN109342131A (en) * | 2018-11-16 | 2019-02-15 | 北京雪迪龙科技股份有限公司 | A kind of Low Concentration Mercury detection system and detection method |
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| CN110595859A (en) * | 2019-10-29 | 2019-12-20 | 长沙开元弘盛科技有限公司 | Water removal method, analyzer and water removal device thereof |
| CN112649457A (en) * | 2021-01-15 | 2021-04-13 | 钢研纳克检测技术股份有限公司 | X-ray fluorescence rapid analysis method for trace heavy metal mercury in solid sample |
| CN113092691A (en) * | 2021-05-06 | 2021-07-09 | 上海烟草集团有限责任公司 | Device for detecting moisture content in gas |
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Application publication date: 20140305 |