CN104155249A - Monitoring device and monitoring method for simultaneously measuring zero-valence mercury and divalent mercury - Google Patents
Monitoring device and monitoring method for simultaneously measuring zero-valence mercury and divalent mercury Download PDFInfo
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- CN104155249A CN104155249A CN201410340042.XA CN201410340042A CN104155249A CN 104155249 A CN104155249 A CN 104155249A CN 201410340042 A CN201410340042 A CN 201410340042A CN 104155249 A CN104155249 A CN 104155249A
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- mercury
- nonvalent
- vapor analyzer
- flue gas
- reaction tube
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Abstract
The invention relates to a monitoring device and a monitoring method for simultaneously measuring zero-valence mercury and divalent mercury. The device comprises a first mercury measuring instrument, a reaction tube, a tubular furnace and a second mercury measuring instrument, wherein an outlet of the first mercury measuring instrument is connected with an inlet of the reaction tube; the reaction tube is arranged in the tubular furnace; an outlet of the reaction tube is connected with an inlet of the second mercury measuring instrument. The monitoring method for simultaneously measuring the zero-valence mercury and the divalent mercury comprises the following steps: firstly introducing smoke to be detected into the first mercury measuring instrument so as to measure the amount of the zero-valence mercury; subsequently introducing the smoke into the reaction tube in the tubular furnace and reducing the divalent mercury in the smoke to the zero-valence mercury under the condition of heating; introducing the reacted smoke into the second mercury measuring instrument, and measuring the amount of the reduced zero-valence mercury; calculating a difference between the amount of the zero-valence mercury, measured by the first mercury measuring instrument, and the amount of the zero-valence mercury, measured by the second mercury measuring instrument, namely the amount of the divalent mercury in the smoke to be detected. The monitoring device and the monitoring method can be used for simultaneously measuring the zero-valence mercury and the divalent mercury; the balance of the mercury of a reaction system can be monitored; the monitoring device and the monitoring method are simple in process and excellent in performance, and have certain application prospects.
Description
Technical field
The present invention relates to a kind of nonvalent mercury and mercuric device of simultaneously measuring in gaseous mercury, and the method to gaseous mercury balance monitoring.
Background technology
Mercury is one of heavy metal element that environment Poisoning is the strongest, directly affects the mankind's daily life, so it is more and more paid close attention to.The discharge of mercury comprises nonvalent mercury, divalence mercury and three kinds of forms of particle mercury, and wherein particle mercury can be caught by particle collection equipment, and nonvalent mercury can directly be measured by mercury vapor analyzer, and the more difficult measurement of divalence mercury, to engineering, application is made troubles.
CN102087222A discloses a kind of method that opposite sex detects dimercurion, by preparing gold nano solution, testing sample and melamine solution is mixed, last testing sample detects, the method spirit lightness is high, and detection time is short, but be not suitable for gaseous mercury, detects.
CN103389293A discloses a kind of mercuric method of detection, the single strand dna B modifying by fluorescein contains the complementary series with the DNA capturing probe that is fixed on detecting head surface (being single strand dna A), contain the T-T base mispairing structure that can be combined with dimercurion simultaneously, carry out divalence mercury mensuration.The method has obvious limitation for the detection of gaseous mercury.
CN103293326A discloses a kind of flue gas form mercury emissions continuous monitor system and monitoring method thereof.Monitoring method is: first divalence mercury adsorbent solution is extracted in reactor, absorb the divalence mercury in flue gas, by mercury measurement device, measure the concentration of nonvalent mercury in flue gas, again divalence mercury reducing solution is extracted in reactor, divalence mercury is reduced to nonvalent mercury, and now mercury measurement device is measured is mercuric concentration in former flue gas.The method simple possible, but because whole reaction is carried out in solution, the water in solution exerts an influence the monitoring to mercury vapor analyzer, thereby affects accuracy of detection.
Summary of the invention
The object of the invention is to the deficiency for prior art, break through the monitoring divalence mercury technology of existing complicated operation, by heating, realize and measure nonvalent mercury and divalence mercury simultaneously, a kind of mercury balance monitoring means are provided.
For reaching this object, the present invention by the following technical solutions:
Measure nonvalent mercury and a mercuric monitoring device, described device comprises the first mercury vapor analyzer, reaction tube, tubular furnace and the second mercury vapor analyzer simultaneously;
Described the first mercury vapor analyzer outlet is connected with reaction tube entrance; Described reaction tube is placed in tubular furnace; Described reaction tube outlet is connected with the second mercury vapor analyzer entrance.
Described the first mercury vapor analyzer and the second mercury vapor analyzer are to adopt Atomic absorption principle to measure the nonvalent mercury in flue gas.
Nonvalent mercury before described the first mercury vapor analyzer assaying reaction.Nonvalent mercury after described the second mercury vapor analyzer assaying reaction.
The present invention also provide a kind of employing as mentioned above device carry out nonvalent mercury and mercuric monitoring method, described method comprises the steps:
First flue gas to be measured enters the amount of measuring nonvalent mercury in the first mercury vapor analyzer; Then enter in the reaction tube in tubular furnace, under heating condition, the divalence mercury in flue gas is reduced into nonvalent mercury; Reacted flue gas enters the second mercury vapor analyzer, measures the amount of the rear nonvalent mercury of reduction; The difference of the amount of the nonvalent mercury that described the first mercury vapor analyzer and the second mercury vapor analyzer record is mercuric amount in flue gas to be measured.
The residence time of described flue gas to be measured in reaction tube is 0.1～0.5s, flue gas to be measured at this moment between section in can be reduced.For example can select 0.11s, 0.13s, 0.18s, 0.22s, 0.28s, 0.34s, 0.4s, 0.42s, 0.49s etc.
The described residence time is 0.3s.
Heating-up temperature in described reaction tube is 700～900 ℃, and the mercury compound in flue gas to be measured can be reduced into nonvalent mercury in this temperature range.For example can select 700.01 ℃, 700.3 ℃, 712 ℃, 730 ℃, 756 ℃, 770 ℃, 798 ℃, 820 ℃, 875 ℃, 893 ℃ etc.
Heating-up temperature in described reaction tube is 900 ℃.
Measure nonvalent mercury and a mercuric monitoring method, described method specifically comprises the steps: simultaneously
First flue gas to be measured enters the amount of measuring nonvalent mercury in the first mercury vapor analyzer; Then enter in the reaction tube in tubular furnace, at 700～900 ℃, the divalence mercury in flue gas is reduced into nonvalent mercury, the residence time is 0.1～0.5s; Reacted flue gas enters the second mercury vapor analyzer, measures the amount of the rear nonvalent mercury of reduction; The difference of the amount of the nonvalent mercury that described the first mercury vapor analyzer and the second mercury vapor analyzer record is mercuric amount in flue gas to be measured.
Particularly, adopt device as above to measure nonvalent mercury and mercuric monitoring method, described method comprises the steps:
Flue gas to be measured enters the first mercury vapor analyzer through pipeline, now amount (the Hg of nonvalent mercury in the first mercury vapor analyzer test flue gas
0); The flue gas of the first mercury vapor analyzer outlet, enters reaction tube through pipeline, and the residence time is 0.1～0.5s, and gas residence time is preferably 0.3s; In tubular furnace, high-temperature heating is to 700～900 ℃ of the decomposition temperatures of mercury compound, and the heating-up temperature in reaction tube is preferably 900 ℃, and the divalence mercury in flue gas is reduced into nonvalent mercury, by the second mercury vapor analyzer, and nonvalent mercury total amount (Hg after reduction in test flue gas
total), the difference of the amount of the nonvalent mercury that the first mercury vapor analyzer and the second mercury vapor analyzer record is mercuric amount, i.e. Hg
2+=Hg
total-Hg
0.
Compare with prior art scheme, the present invention has following beneficial effect:
(1) apparatus structure of the present invention, technological operation are simple, function admirable;
(2) mensuration nonvalent mercury of the present invention and mercuric device, can realize and measure nonvalent mercury and divalence mercury simultaneously;
(3) the present invention has realized mercury balance monitoring.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of simultaneously measuring nonvalent mercury and mercuric monitoring device of the present invention;
Fig. 2 surveys Hg simultaneously
0and Hg
2+experimental result.
Reference numeral is as follows:
1-the first mercury vapor analyzer; 2-reaction tube; 3-tubular furnace; 4-the second mercury vapor analyzer.
Below the present invention is described in more detail.But following example is only simple and easy example of the present invention, does not represent or limit the scope of the present invention, and protection scope of the present invention is as the criterion with claims.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, further illustrate technical scheme of the present invention.
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
As shown in Figure 1, a kind of nonvalent mercury and mercuric monitoring device simultaneously measured, described device comprises the first mercury vapor analyzer 1, reaction tube 2, tubular furnace 3 and the second mercury vapor analyzer 4;
Described the first mercury vapor analyzer 1 outlet is connected with reaction tube 2 entrances; Described reaction tube 2 is placed in tubular furnace 3; Described reaction tube 2 outlets are connected with the second mercury vapor analyzer 4 entrances.
Described the first mercury vapor analyzer 1 and the second mercury vapor analyzer 4 are to adopt Atomic absorption principle to measure the nonvalent mercury in flue gas.
Nonvalent mercury before described the first mercury vapor analyzer 1 assaying reaction.
Nonvalent mercury after described the second mercury vapor analyzer 4 assaying reactions.
Specific embodiment 1
Adopt and as abovely measure nonvalent mercury and mercuric monitoring device is measured nonvalent mercury and divalence mercury simultaneously, comprise the steps: that flue gas to be measured enters the first mercury vapor analyzer 1 through pipeline, now in the first mercury vapor analyzer 1 test flue gas, the amount of nonvalent mercury (is Hg
0); The flue gas of the first mercury vapor analyzer 1 outlet, enters reaction tube 2 through pipeline, and the residence time is 0.3s, 900 ℃ of the interior high-temperature heatings of tubular furnace 3, the divalence mercury in flue gas is reduced into nonvalent mercury, by the nonvalent mercury after the second mercury vapor analyzer 4 assaying reactions, (is Hg
total), mercuric amount Hg
2+=Hg
total-Hg
0(being the shaded area between dotted line and solid line in Fig. 2).Then keep the residence time constant, tubular furnace is cooled to 800 ℃, the content of mercuric amount declines, rising tubular type furnace temperature, and the content of mercuric amount increases, and result is as shown in Figure 2.
Specific embodiment 2
Adopt and as abovely measure nonvalent mercury and mercuric monitoring device is measured nonvalent mercury and divalence mercury simultaneously, comprise the steps: that flue gas to be measured enters the first mercury vapor analyzer 1 through pipeline, now in the first mercury vapor analyzer 1 test flue gas, the amount of nonvalent mercury (is Hg
0); The flue gas of the first mercury vapor analyzer 1 outlet, enters reaction tube 2 through pipeline, and the residence time is 0.5s, 700 ℃ of the interior high-temperature heatings of tubular furnace 3, the divalence mercury in flue gas is reduced into nonvalent mercury, by the nonvalent mercury after the second mercury vapor analyzer 4 assaying reactions, (is Hg
total), mercuric amount Hg
2+=Hg
total-Hg
0.
Specific embodiment 3
Adopt and as abovely measure nonvalent mercury and mercuric monitoring device is measured nonvalent mercury and divalence mercury simultaneously, comprise the steps: that flue gas to be measured enters the first mercury vapor analyzer 1 through pipeline, now in the first mercury vapor analyzer 1 test flue gas, the amount of nonvalent mercury (is Hg
0); The flue gas of the first mercury vapor analyzer 1 outlet, enters reaction tube 2 through pipeline, and the residence time is 0.1s, 800 ℃ of the interior high-temperature heatings of tubular furnace 3, the divalence mercury in flue gas is reduced into nonvalent mercury, by the nonvalent mercury after the second mercury vapor analyzer 4 assaying reactions, (is Hg
total), mercuric amount Hg
2+=Hg
total-Hg
0.
Applicant's statement, the present invention illustrates detailed structure feature of the present invention and method by above-described embodiment, but the present invention is not limited to above-mentioned detailed structure feature and method, do not mean that the present invention must rely on above-mentioned detailed structure feature and method could be implemented.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the increase of the equivalence replacement of the selected parts of the present invention and accessory, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. measure nonvalent mercury and a mercuric monitoring device simultaneously, it is characterized in that, described device comprises the first mercury vapor analyzer (1), reaction tube (2), tubular furnace (3) and the second mercury vapor analyzer (4);
Described the first mercury vapor analyzer (1) outlet is connected with reaction tube (2) entrance; Described reaction tube (2) is placed in tubular furnace (3); Described reaction tube (2) outlet is connected with the second mercury vapor analyzer (4) entrance.
2. monitoring device as claimed in claim 1, is characterized in that, described the first mercury vapor analyzer (1) and the second mercury vapor analyzer (4) are to adopt Atomic absorption principle to measure the nonvalent mercury in flue gas.
3. monitoring device as claimed in claim 1 or 2, is characterized in that, the nonvalent mercury before described the first mercury vapor analyzer (1) assaying reaction.
4. monitoring device as claimed in claim 1 or 2, is characterized in that, the nonvalent mercury after described the second mercury vapor analyzer (4) assaying reaction.
5. employing device as described in one of claim 1-4 carries out nonvalent mercury and a mercuric monitoring method, it is characterized in that, described method comprises the steps:
First flue gas to be measured enters the amount of measuring nonvalent mercury in the first mercury vapor analyzer (1); Then enter in the reaction tube (2) in tubular furnace (3), under heating condition, the divalence mercury in flue gas is reduced into nonvalent mercury; Reacted flue gas enters the second mercury vapor analyzer (4), measures the amount of the rear nonvalent mercury of reduction; The difference of the amount of the nonvalent mercury that described the first mercury vapor analyzer (1) and the second mercury vapor analyzer (4) record is mercuric amount in flue gas to be measured.
6. monitoring method as claimed in claim 5, is characterized in that, the residence time of described flue gas to be measured in reaction tube (2) is 0.1～0.5s.
7. monitoring method as claimed in claim 6, is characterized in that, the described residence time is 0.3s.
8. the monitoring method as described in one of claim 5-7, is characterized in that, the heating-up temperature in described reaction tube (2) is 700～900 ℃.
9. the monitoring method as described in one of claim 5-8, is characterized in that, the heating-up temperature in described reaction tube (2) is 900 ℃.
10. the monitoring method as described in one of claim 5-9, is characterized in that, described method comprises the steps:
First flue gas to be measured enters the amount of measuring nonvalent mercury in the first mercury vapor analyzer (1); Then enter in the reaction tube (2) in tubular furnace (3), at 700～900 ℃, the divalence mercury in flue gas is reduced into nonvalent mercury, the residence time is 0.1～0.5s; Reacted flue gas enters the second mercury vapor analyzer (4), measures the amount of the rear nonvalent mercury of reduction; The difference of the amount of the nonvalent mercury that described the first mercury vapor analyzer (1) and the second mercury vapor analyzer (4) record is mercuric amount in flue gas to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410340042.XA CN104155249A (en) | 2014-07-17 | 2014-07-17 | Monitoring device and monitoring method for simultaneously measuring zero-valence mercury and divalent mercury |
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|---|---|---|---|
| CN201410340042.XA CN104155249A (en) | 2014-07-17 | 2014-07-17 | Monitoring device and monitoring method for simultaneously measuring zero-valence mercury and divalent mercury |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617827A (en) * | 2015-12-22 | 2016-06-01 | 华北电力大学（保定） | Reduction device for divalent mercury to elemental mercury conversion |
| CN111487370A (en) * | 2020-04-16 | 2020-08-04 | 南京理工大学 | Device and method for converting oxidized mercury and measuring total mercury content of flue gas |
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| US20080131324A1 (en) * | 2003-10-20 | 2008-06-05 | Perma Pure Llc | Filter for determination of mercury in exhaust gases |
| CN101500700A (en) * | 2005-05-02 | 2009-08-05 | 热费希尔科学公司 | Method and apparatus for converting oxidized mercury into elemental mercury |
| CN102368065A (en) * | 2011-09-26 | 2012-03-07 | 上海电力学院 | Device for determining mercury content with different forms in coal-burning flue gas and its application |
| CN102500203A (en) * | 2011-09-26 | 2012-06-20 | 上海电力学院 | Generation device for bivalent mercury in simulated flue gas and application thereof |
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2014
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Patent Citations (7)
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| US5879948A (en) * | 1997-05-12 | 1999-03-09 | Tennessee Valley Authority | Determination of total mercury in exhaust gases |
| US20080131324A1 (en) * | 2003-10-20 | 2008-06-05 | Perma Pure Llc | Filter for determination of mercury in exhaust gases |
| CN101500700A (en) * | 2005-05-02 | 2009-08-05 | 热费希尔科学公司 | Method and apparatus for converting oxidized mercury into elemental mercury |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105617827A (en) * | 2015-12-22 | 2016-06-01 | 华北电力大学（保定） | Reduction device for divalent mercury to elemental mercury conversion |
| CN105617827B (en) * | 2015-12-22 | 2019-03-01 | 华北电力大学（保定） | A kind of bivalent mercury is converted into the reduction apparatus of nonvalent mercury |
| CN111487370A (en) * | 2020-04-16 | 2020-08-04 | 南京理工大学 | Device and method for converting oxidized mercury and measuring total mercury content of flue gas |
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