CN204128950U - A kind of measuring instrument measuring low concentration mercury - Google Patents
A kind of measuring instrument measuring low concentration mercury Download PDFInfo
- Publication number
- CN204128950U CN204128950U CN201420496672.1U CN201420496672U CN204128950U CN 204128950 U CN204128950 U CN 204128950U CN 201420496672 U CN201420496672 U CN 201420496672U CN 204128950 U CN204128950 U CN 204128950U
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- Prior art keywords
- mercury
- air intake
- intake opening
- low concentration
- gas outlet
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Abstract
The utility model discloses a kind of measuring instrument measuring low concentration mercury, described mercury measurement device is connected with mercury enriching apparatus by connector, after described collimating mirror is located at described mercury lamp, after described slit is located at collimating mirror, the one end in described absorption of sample pond is connected with air intake opening, the other end is connected with one end of described reference absorption cell by the first mercury adsorption tube, the other end of described reference absorption cell connects gas outlet by vacuum pump, after described condenser lens is located at described absorption of sample pond and reference absorption cell, after described optical filter is located at described condenser lens, after described double-channel detector is located at optical filter, the coated mercury enriched layer with back-shaped indentation of the outside surface of described interior pipe, heating rod stretches in interior pipe, described outer tube is provided with air intake opening and gas outlet.This can measure the measuring instrument of low concentration mercury, and the structure adopting mercury measurement device to be connected with mercury enriching apparatus, measures more accurately sensitive, can measure the mercury that concentration is lower.
Description
Technical field
The utility model relates to surveying instrument technical field, is specially a kind of measuring instrument measuring low concentration mercury.
Background technology
Mercury (Hg), as a kind of high-risk harmful element, directly affects physical environment and the daily life of human survival, so the detection to mercury content in object and the detection to mercury pollution and administering also comes into one's own day by day.Under normal circumstances, mercury is present in occurring in nature with the form of organic or inorganic compound, and its sample morphology can be liquid, solid-state or gaseous state.For the detection of mercury, the method of general employing is be mercury sample morphology according to different, adopt corresponding sample-pretreating method, organic mercury contained in sample or inorganic mercury are transformed the mercury vapour (HgO) that (or reduction) is atomic state, then be introduced into detecting device, and total mercury content is detected, but whether just cannot judge when the concentration of mercury is lower in certain material containing mercury, for the problems referred to above, we propose a kind of measuring instrument measuring low concentration mercury.
Utility model content
The purpose of this utility model is to provide a kind of measuring instrument measuring low concentration mercury, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme: a kind of measuring instrument measuring low concentration mercury, comprises mercury measurement device, mercury enriching apparatus and connector, and described mercury measurement device is connected with mercury enriching apparatus by connector;
Mercury measurement device comprises mercury lamp, collimating mirror, slit, first mercury adsorption tube, absorption of sample pond, reference absorption cell, second mercury adsorption tube, school zero air intake opening, solenoid valve, measure air intake opening, double-channel detector, condenser lens, optical filter, vacuum pump, flowmeter and gas outlet, after described collimating mirror is located at described mercury lamp, the optical alignment that described mercury lamp sends by described collimating mirror is directional light, after described slit is located at described collimating mirror, described directional light is divided into two bundle parallel beams by described slit, after described two bundle parallel beams are located at respectively by described absorption of sample pond and reference absorption cell, the one end in described absorption of sample pond is connected with air intake opening, the other end is connected with one end of described reference absorption cell by the first mercury adsorption tube (comprising thermal analysis apparatus), the other end of described reference absorption cell connects gas outlet by vacuum pump, after described condenser lens is located at described absorption of sample pond and reference absorption cell, after described optical filter is located at described condenser lens, after described double-channel detector is located at optical filter, described double-channel detector changes the light signal detected into electric signal,
Mercury enriching apparatus comprises air intake opening, heating rod, outer tube, space, mercury enriched layer, interior pipe, gas outlet, end cap, lead-in wire, joint and indentation, space is left between described outer tube and interior pipe, the coated mercury enriched layer with back-shaped indentation of the outside surface of described interior pipe, heating rod stretches in interior pipe, and described outer tube is provided with air intake opening and gas outlet.
Preferably, described optical filter is the narrow-band-filter chip architecture only allowing the light of 254nm wavelength pass through, described double-channel detector is binary channels silicon photodiode detector structure, and also with noiselike signal amplifying circuit and A/D converter in double-channel detector, amplify and A/D conversion to carry out signal, described double-channel detector is connected to master control circuit board and computing machine, also flowmeter is provided with between described vacuum pump and gas outlet, described first mercury adsorption tube is with thermal analysis apparatus, described thermal analysis apparatus is measured for activating described first mercury adsorption tube or carrying out preenrichment Thermal desorption mode.
Preferably, described mercury enriched layer is Gold plated Layer, it is back-shaped and become a resistor that mercury enriched layer is divided into continuous print by indentation, the end of described outer tube and interior pipe has end cap, and the lead-in wire be connected with mercury enriched layer two ends and the joint be connected with well heater expose end cap and be connected with measurement air intake opening.
Preferably, described connector is the structure that two connecting pipes accumulate a connecting pipe.
Compared with prior art, the beneficial effects of the utility model are: this can measure the measuring instrument of low concentration mercury, and the structure adopting mercury measurement device to be connected with mercury enriching apparatus, measures more accurately sensitive, can measure the mercury that concentration is lower.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the expansion schematic diagram of mercury enriched layer in Fig. 1;
Fig. 3 is the A-A cut-open view of Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-3, the utility model provides a kind of technical scheme: a kind of measuring instrument measuring low concentration mercury, comprise mercury measurement device 1, mercury enriching apparatus 2 and connector 3, described mercury measurement device 1 is connected with mercury enriching apparatus 2 by connector 3, and described connector 3 is the structure that two connecting pipes accumulate a connecting pipe;
Mercury measurement device 1 comprises mercury lamp 11, collimating mirror 12, slit 13, first mercury adsorption tube 14, absorption of sample pond 15, reference absorption cell 16, second mercury adsorption tube 17, school zero air intake opening 18, solenoid valve 19, measure air intake opening 110, double-channel detector 111, condenser lens 112, optical filter 113, vacuum pump 114, flowmeter 115 and gas outlet 116, the mercury lamp 11 of low noise mercury lamp power supply sends the light comprising mercury characteristic spectral line, the light that mercury lamp 11 sends by collimating mirror 12, collimation is directional light, directional light is divided into two bundle parallel beams by slit 13, two bundle parallel beams are respectively by absorption of sample pond 15 and reference absorption cell 16, then filtered by optical filter 113 (only allow the narrow band pass filter that the light of 254nm wavelength passes through) again after condenser lens 112 focuses on, two bundles are by the light of optical filter 113, finally be irradiated on double-channel detector 111, change the light signal detected into electric signal, double-channel detector 111 can be binary channels silicon photodiode detector, with noiselike signal amplifying circuit and A/D converter, can also amplify and A/D conversion to carry out signal in double-channel detector 111.Double-channel detector 111 is connected to master control circuit board and computing machine, in described computing machine, include control software design and operational software, realize running and control and data operation, the one end in described absorption of sample pond 15 is connected with air intake opening, the other end is connected with one end of reference absorption cell 16 by the first mercury adsorption tube 14, described first mercury adsorption tube 14 can with thermal analysis apparatus, described thermal analysis apparatus is measured for activating described first mercury adsorption tube 14 or carrying out preenrichment Thermal desorption mode, the other end of described reference absorption cell 16 connects gas outlet 116 by vacuum pump 114, also flowmeter 15 can be provided with between described vacuum pump 114 and gas outlet 16, described air intake opening is school zero air intake opening 18 that measurement air intake opening 110 is connected with by the second mercury adsorption tube 17, measurement air intake opening 110 and school zero air intake opening 18 are by the selectable connection of solenoid valve 19,
Mercury enriching apparatus 2 comprises air intake opening 21, heating rod 22, outer tube 23, space 24, mercury enriched layer 25, interior pipe 26, gas outlet 27, end cap 28, lead-in wire 29, joint 210 and indentation 211, described outer tube 23 is a cylinder-like structure, be provided with the air intake opening 21 through with outer tube 23 in the front portion of outer tube 23, the afterbody of outer tube 23 is provided with the gas outlet 27 through with outer tube 23; The interior pipe 26 of a cylinder-like structure to extend in outer tube 23 and arranges with outer tube 23 is concentric, and leave space 24 between outer tube 23 and interior pipe, the tail end of outer tube 23 and interior pipe 26 is sealed completely by end cap 28.The outside surface of interior pipe 26 forms one deck mercury enriched layer 25 by method that is gold-plated or coating, and this mercury enriched layer 25 is divided into a continuous print jatharapanvartanasana by indentation 211 and becomes a resistor.Mercury enriched layer 25 preferably adopts 99.99% high-purity gold, and its thickness is 0.02-0.05mm.In interior pipe 26, be also provided with a heating rod 22, this heating rod 22 with resistance heater or electric ceramic well heater, can heat in order to internal pipe 26 and mercury enriched layer 25.Mercury enriched layer 25 exposes end cap 28 by the lead-in wire 29 that two ends connect and is connected with measurement air intake opening 110, the joint 210 be connected with well heater 22 also exposes end cap 28 and is connected with Temperature-controlled appliance, said outer tube 13 is by quartz glass, or by corrosion-resistant, refractory ceramics, or engineering plastics are made.
During use, air intake opening 211 is connected with gaseous sample acquisition system by conduit, and by gas outlet 27 directly or be connected by conduit and the gas circuit multiport valve that leads, now the gas circuit multiport valve that leads should be adjusted to " sampling " state, then at regular time and quantity gaseous sample is sampled.After the sample gas of mercurous (Hg) flows through mercury enriched layer 25 surface, mercury is adsorbed by mercury enriched layer 25, and then not mercurous portion gas discharges through gas circuit guiding multiport valve.When timing reaches, the multiport valve that gas circuit led is adjusted to " measurement " state, by temperature controller to heating rod 22 electrified regulation, the mercury by adsorbing is made to carry out Thermal release, the mercury vapour discharged enters into mercury measurement device 1 and carries out quantitative measurment to the concentration of mercury under the effect of carrier gas (usually adopting Ar argon gas), open vacuum pump 114, gaseous sample containing mercury, first absorption of sample pond 15 is entered, then through the first mercury adsorption tube 14, mercury in sample is all adsorbed, reference absorption cell 16 is entered by the sample after the first mercury adsorption tube 14, discharge finally by gas outlet 116, undertaken after logarithm operation difference subtracts by the two ways of optical signals of absorption of sample pond 15 and reference absorption cell 16, obtain the absorption value of mercury in sample, this absorption value is directly proportional to the content of mercury in sample, meet lambert beer law.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (5)
1. can measure a measuring instrument for low concentration mercury, comprise mercury measurement device, mercury enriching apparatus and connector, it is characterized in that: described mercury measurement device is connected with mercury enriching apparatus by connector;
Mercury measurement device comprises mercury lamp, collimating mirror, slit, first mercury adsorption tube, absorption of sample pond, reference absorption cell, second mercury adsorption tube, school zero air intake opening, solenoid valve, measure air intake opening, double-channel detector, condenser lens, optical filter, vacuum pump, flowmeter and gas outlet, after described collimating mirror is located at described mercury lamp, the optical alignment that described mercury lamp sends by described collimating mirror is directional light, after described slit is located at described collimating mirror, described directional light is divided into two bundle parallel beams by described slit, after described two bundle parallel beams are located at respectively by described absorption of sample pond and reference absorption cell, the one end in described absorption of sample pond is connected with air intake opening, the other end is connected with one end of described reference absorption cell by the first mercury adsorption tube comprising thermal analysis apparatus, the other end of described reference absorption cell connects gas outlet by vacuum pump, after described condenser lens is located at described absorption of sample pond and reference absorption cell, after described optical filter is located at described condenser lens, after described double-channel detector is located at optical filter, described double-channel detector changes the light signal detected into electric signal,
Mercury enriching apparatus comprises air intake opening, heating rod, outer tube, space, mercury enriched layer, interior pipe, gas outlet, end cap, lead-in wire, joint and indentation, space is left between described outer tube and interior pipe, the coated mercury enriched layer with back-shaped indentation of the outside surface of described interior pipe, heating rod stretches in interior pipe, and described outer tube is provided with air intake opening and gas outlet.
2. a kind of measuring instrument measuring low concentration mercury according to claim 1, it is characterized in that: described optical filter is the narrow-band-filter chip architecture only allowing the light of 254nm wavelength pass through, described double-channel detector is binary channels silicon photodiode detector structure, also flowmeter is provided with between described vacuum pump and gas outlet, described first mercury adsorption tube is with thermal analysis apparatus, and described thermal analysis apparatus is measured for activating described first mercury adsorption tube or carrying out preenrichment Thermal desorption mode.
3. a kind of measuring instrument measuring low concentration mercury according to claim 2, it is characterized in that: also with noiselike signal amplifying circuit and A/D converter in described double-channel detector, amplify and A/D conversion to carry out signal, described double-channel detector is connected to master control circuit board and computing machine.
4. a kind of measuring instrument measuring low concentration mercury according to claim 1, it is characterized in that: described mercury enriched layer is Gold plated Layer, it is back-shaped and become a resistor that mercury enriched layer is divided into continuous print by indentation, the end of described outer tube and interior pipe has end cap, and the lead-in wire be connected with mercury enriched layer two ends and the joint be connected with well heater expose end cap and be connected with measurement air intake opening.
5. a kind of measuring instrument measuring low concentration mercury according to claim 1, is characterized in that: described connector is the structure that two connecting pipes accumulate a connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420496672.1U CN204128950U (en) | 2014-08-29 | 2014-08-29 | A kind of measuring instrument measuring low concentration mercury |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420496672.1U CN204128950U (en) | 2014-08-29 | 2014-08-29 | A kind of measuring instrument measuring low concentration mercury |
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| CN204128950U true CN204128950U (en) | 2015-01-28 |
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| CN201420496672.1U Expired - Fee Related CN204128950U (en) | 2014-08-29 | 2014-08-29 | A kind of measuring instrument measuring low concentration mercury |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092866A (en) * | 2015-08-20 | 2015-11-25 | 长沙开元仪器股份有限公司 | Automatic mercury measurement device |
| CN108375562A (en) * | 2018-03-14 | 2018-08-07 | 北京普立泰科仪器有限公司 | A kind of mercury detector of high measurement accuracy |
-
2014
- 2014-08-29 CN CN201420496672.1U patent/CN204128950U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092866A (en) * | 2015-08-20 | 2015-11-25 | 长沙开元仪器股份有限公司 | Automatic mercury measurement device |
| CN108375562A (en) * | 2018-03-14 | 2018-08-07 | 北京普立泰科仪器有限公司 | A kind of mercury detector of high measurement accuracy |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20150829 |
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| EXPY | Termination of patent right or utility model |