CN204832136U - Gaseous detection device of online zero correction environment - Google Patents
Gaseous detection device of online zero correction environment Download PDFInfo
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- CN204832136U CN204832136U CN201520433971.5U CN201520433971U CN204832136U CN 204832136 U CN204832136 U CN 204832136U CN 201520433971 U CN201520433971 U CN 201520433971U CN 204832136 U CN204832136 U CN 204832136U
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Abstract
The utility model discloses a gaseous detection device of online zero correction environment, module, air current switch and detection module take place including sampling module, zero gas for the device, the module takes place and is treated by what the setting was used for the de aeration sample median that the monitoring is gaseous for zero gas, detection module treats the gaseous sensor of monitoring including detecting, air sample process the sampling module gets into gaseous detection device, the air current switch has first state and second state, works as the air current switch is in during first state, air sample stream warp it is reentrant after the zero gas emergence module detection module, when the air current switch is in during the second state, the air sample is not flowed through the module takes place for zero gas, gets into detection module. The utility model discloses a device detects treats that the monitoring is gaseous, and the monitoring data is more accurate.
Description
Technical field
The utility model relates to environmental monitoring field, particularly relates to a kind of online zero correction environmental gas pick-up unit.
Background technology
Environmental malodors gas concentration inspect, uses electrochemical sensor to detect the concentration of gas to be monitored (foul gas), such as H usually
2s, NH
3, the concentration of the foul gas such as amine.Electrochemical sensor, along with service time passes, there will be zero point drift, namely also showing signal when not having gas-monitoring.Be generally used in the pure air compression gas tank (zero gas gas tank) that laboratory etc. produces and be carried to scene as zero gas, to sensor input, correcting sensor zero point, need like this to spend a large amount of labours, be subject to place, the restriction of road and time.In order to improve, the utility model CN102866232B of such as China Mining University discloses and zero gas gas tank is directly installed on sensor front end, by controlling to switch, timing carries out the technical scheme of zero correction to sensor with zero gas, can realize the technique effect that self-timing corrects like this.Need to use gas tank steel cylinder, the large Heavy Weight of volume, is unfavorable for miniaturization.At this moment, the zero point of acquisition is the zero point (hereinafter referred to as clean zero point) of pure air.
The present inventor finds in actual monitoring, adopts on-the-spot air Zero gas generator purified gas to carry out the zero point of zero correction (hereinafter referred to as on-the-spot zero point) and there are differences with clean zero point.That is, in sensor gas at the scene, measured value is the impact being subject to gas on-site, therefore, really will obtain the actual concentration of gas-monitoring in on-the-spot air, needs to carry out on-the-spot zero gas to sensor and corrects.
Utility model content
Because the above-mentioned defect of prior art, it is cannot accurately carry out this technical matters of zero correction during online environmental gas detects that the utility model will solve.
For achieving the above object, the utility model provides a kind of online zero correction environmental gas pick-up unit, described device comprises sampling module, zero gas generation module, air flow switch and detection module, described zero gas generation module is arranged for the gas to be monitored removed in air sample, and described detection module comprises the sensor detecting gas to be monitored;
Described air sample enters described gas-detecting device through described sampling module, described air flow switch has the first state and the second state, when described air flow switch is in described first state, described air sample enters described detection module after flowing through described zero gas generation module again; When described air flow switch is in described second state, described air sample does not flow through described zero gas generation module, enters described detection module.
In another preference, described device also comprises filtering module, and described filtering module is connected to described sampling module, after being positioned at described sampling module.Described filtering module is arranged for the solid tiny particle in filtering air sample.
In another preference, described device also comprises air chamber, and described air chamber is connected to described detection module, before being positioned at described detection module.
In another preference, described zero gas generation module comprises oxidation unit and absorbing unit, and described oxidation unit is arranged for gas to be monitored described in catalytic oxidation, and described absorbing unit is set to for adsorption and oxidation afterproduct.
In another preference, described oxidation unit comprises the oxygenant being selected from lower group: potassium permanganate, manganese oxide or its combination.
In another preference, described absorbing unit comprises the adsorbent being selected from lower group: molecular sieve, clay, acticarbon or its combination.
In another preference, described device also comprises control module, and described control module comprises control module, and described control module is arranged for the state controlling described air flow switch.
In another preference, described control module also comprises data processing unit, and described data processing unit is arranged for the data recording described detection module and produce.
In another preference, described air flow switch is solenoid directional control valve.
Technique effect
Online zero correction environmental gas pick-up unit of the present utility model, have employed the online module producing zero gas, by the air sample at scene, directly removes the gas to be monitored needing to carry out detecting, thus zero gas needed for producing.Therefore, the zero point of correction is the zero point under other backgrounds on-the-spot exist, and namely other non-monitored gases deposit zero point in case, and after such suppressed zero, the increment carrying out detecting is the increment caused by concentration wanting gas-monitoring, and Monitoring Data is more accurate.
Be described further below with reference to the technique effect of accompanying drawing to design of the present utility model, concrete structure and generation, to understand the purpose of this utility model, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present utility model.
Embodiment
As shown in Figure 1, the utility model provides a kind of online zero correction environmental gas pick-up unit, this device comprises sampling module 1, filtering module 2, air chamber 5 and detection module 6, and detection module 6 comprises one or more sensor, arranges asepwirator pump for air-flow and provides power.An other gas circuit is provided with before entering air chamber 5, zero gas generation module 3 is provided with in other gas circuit, described zero gas generation module 3 comprises oxidation unit and the absorbing unit of series connection, is realized the action control of normal monitoring and zero correction by air flow switch 4 (reversal valve).Namely in the time of setting, the control module instruction air flow switch 4 of control module is switched to other gas circuit, the air sample of such sampling is by other gas circuit, in peroxidic units, the absorption of adsorbent in the catalytic oxidation of catalytic oxidant and absorbing unit, eliminates the gas to be monitored that sensor will be monitored, thus creates on-the-spot zero gas, enter air chamber 5 and detection module 6, the sensor of module 6 detects after testing, and sensor exports numerical value to data processing unit, is recorded as on-the-spot zero data.Afterwards, the control module instruction of control module switches back normally monitors gas circuit, detects, and exports data (test data) to data processing unit, test data is corrected with on-the-spot zero data during statistics.
General correction time, interval can be determined according to sensor drift situation, through overtesting, the zero point drift of the foul gas sensor of use in one day in 1% scope, preferably, can be set in and carry out zero gas correction night, such as night 12 corrects.
In the present embodiment, the oxidation catalyst adopted, as long as foul gas such as sulfuretted hydrogen, sulfocompound, ammonia, amine that in the on-the-spot air sample of energy, catalytic oxidation will be monitored, the oxygenants such as the potassium permanganate on market, manganese oxide prove effectively, the active potassium permanganate oxidant of preferred use spheric grain, gas pressure drop is little, and oxidation efficiency is high.The adsorbent used, as long as can adsorb the compound of oxidized rear generation, such as, molecular sieve, clay, acticarbon etc., preferably, use granulated acticarbon better.Catalyzer wherein and adsorbent can periodically be changed.
After using through one period of long period, regularly can carry clean zero gas and correct at the scene or sensor is taken back laboratory and correct, the monitoring correctness of test sensors.
Air flow switch 4 is preferably automatically controlled solenoid valve.
In general bad odor monitoring system, use above-mentioned system, precise and stable data can be obtained.Due to use catalyzer and adsorbent be loaded in the gas circuit of bypass, be beneficial to replacing and miniaturization, maintenance cost is less.
Prove after tested, use the technical solution of the utility model to carry out the result of zero gas correction, the result of carrying out zero gas correction than use pure air is more accurate.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technician in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.
Claims (7)
1. an online zero correction environmental gas pick-up unit, it is characterized in that, described device comprises sampling module, zero gas generation module, air flow switch and detection module, described zero gas generation module is arranged for the gas to be monitored removed in air sample, and described detection module comprises the sensor detecting gas to be monitored;
Described air sample enters described gas-detecting device through described sampling module, described air flow switch has the first state and the second state, when described air flow switch is in described first state, described air sample enters described detection module after flowing through described zero gas generation module again; When described air flow switch is in described second state, described air sample does not flow through described zero gas generation module, enters described detection module.
2. online zero correction environmental gas pick-up unit as claimed in claim 1, it is characterized in that, described device also comprises filtering module, and described filtering module is connected to described sampling module, after being positioned at described sampling module.
3. online zero correction environmental gas pick-up unit as claimed in claim 1, it is characterized in that, described device also comprises air chamber, and described air chamber is connected to described detection module, before being positioned at described detection module.
4. online zero correction environmental gas pick-up unit as claimed in claim 1, it is characterized in that, described zero gas generation module comprises oxidation unit and absorbing unit, described oxidation unit is arranged for gas to be monitored described in catalytic oxidation, and described absorbing unit is set to the product for adsorbing after described oxidation unit catalytic oxidation.
5. online zero correction environmental gas pick-up unit as claimed in claim 1, it is characterized in that, described device also comprises control module, and described control module comprises control module, and described control module is arranged for the state controlling described air flow switch.
6. online zero correction environmental gas pick-up unit as claimed in claim 5, it is characterized in that, described control module also comprises data processing unit, and described data processing unit is arranged for the data recording described detection module and produce.
7. online zero correction environmental gas pick-up unit as claimed in claim 1, it is characterized in that, described air flow switch is solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520433971.5U CN204832136U (en) | 2015-06-23 | 2015-06-23 | Gaseous detection device of online zero correction environment |
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|---|---|---|---|
| CN201520433971.5U CN204832136U (en) | 2015-06-23 | 2015-06-23 | Gaseous detection device of online zero correction environment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445158A (en) * | 2016-01-04 | 2016-03-30 | 南京逸然电子科技有限公司 | High-accuracy real-time online detecting instrument for atmospheric pollution |
| CN106053722A (en) * | 2016-05-20 | 2016-10-26 | 东莞市普锐美泰环保科技有限公司 | VOCs detection method and apparatus |
| CN108037250A (en) * | 2018-01-02 | 2018-05-15 | 天津同阳科技发展有限公司 | Detection of Air Quality device and method |
| CN108120798A (en) * | 2016-11-28 | 2018-06-05 | 艾欧史密斯(中国)热水器有限公司 | Sensor device, air purifier and gas measuring method |
| CN108896704A (en) * | 2018-05-10 | 2018-11-27 | 四川理工学院 | A kind of sampling of gas on-line dilution and standard gas generating device and method |
| CN109580887A (en) * | 2019-01-24 | 2019-04-05 | 北京雪迪龙科技股份有限公司 | Gas monitoring system and monitoring method with zero gas generating device self-diagnostic function |
| CN109613184A (en) * | 2019-01-24 | 2019-04-12 | 北京雪迪龙科技股份有限公司 | A kind of gas monitoring system and gas monitoring method with zero gas inner circulation structure |
| CN109813360A (en) * | 2019-01-31 | 2019-05-28 | 中国人民解放军92493部队计量测试研究所 | A kind of environmental parameter temperature and humidity on-line calibration device |
| CN113219134A (en) * | 2021-05-11 | 2021-08-06 | 华中科技大学 | Gas detection device |
-
2015
- 2015-06-23 CN CN201520433971.5U patent/CN204832136U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445158A (en) * | 2016-01-04 | 2016-03-30 | 南京逸然电子科技有限公司 | High-accuracy real-time online detecting instrument for atmospheric pollution |
| CN106053722A (en) * | 2016-05-20 | 2016-10-26 | 东莞市普锐美泰环保科技有限公司 | VOCs detection method and apparatus |
| CN108120798A (en) * | 2016-11-28 | 2018-06-05 | 艾欧史密斯(中国)热水器有限公司 | Sensor device, air purifier and gas measuring method |
| CN108037250A (en) * | 2018-01-02 | 2018-05-15 | 天津同阳科技发展有限公司 | Detection of Air Quality device and method |
| CN108896704A (en) * | 2018-05-10 | 2018-11-27 | 四川理工学院 | A kind of sampling of gas on-line dilution and standard gas generating device and method |
| CN108896704B (en) * | 2018-05-10 | 2021-02-26 | 四川理工学院 | Gas online dilution sampling and standard gas generating device and method |
| CN109580887A (en) * | 2019-01-24 | 2019-04-05 | 北京雪迪龙科技股份有限公司 | Gas monitoring system and monitoring method with zero gas generating device self-diagnostic function |
| CN109613184A (en) * | 2019-01-24 | 2019-04-12 | 北京雪迪龙科技股份有限公司 | A kind of gas monitoring system and gas monitoring method with zero gas inner circulation structure |
| CN109813360A (en) * | 2019-01-31 | 2019-05-28 | 中国人民解放军92493部队计量测试研究所 | A kind of environmental parameter temperature and humidity on-line calibration device |
| CN113219134A (en) * | 2021-05-11 | 2021-08-06 | 华中科技大学 | Gas detection device |
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| CF01 | Termination of patent right due to non-payment of annual fee |