CN102087179A - Infrared gas analysis pretreatment system - Google Patents
Infrared gas analysis pretreatment system Download PDFInfo
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- CN102087179A CN102087179A CN2011100231568A CN201110023156A CN102087179A CN 102087179 A CN102087179 A CN 102087179A CN 2011100231568 A CN2011100231568 A CN 2011100231568A CN 201110023156 A CN201110023156 A CN 201110023156A CN 102087179 A CN102087179 A CN 102087179A
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Abstract
The invention discloses an infrared gas analysis pretreatment system. The system comprises an electromagnetic valve, a condenser, a filter, a sampling pump and an infrared gas analyzer, wherein the electromagnetic valve is provided with a sample gas connector, an air connector and a condenser connector; one end of the condenser is connected with the electromagnetic valve via the condenser connector and the other end of the condenser is connected with one end of the sampling pump via the filter; the condenser is also provided with an outlet; and the other end of the sampling pump is connected with the infrared gas analyzer. By using the system provided by the invention, the same condensation treatment is carried out on the air and the sample gas so that the humidity of the air is similar to that of the sample gas, thus reducing the effect of the difference of the humidity of the air on the measuring results and improving the accuracy of the measuring results.
Description
Technical field
The present invention relates to extraction-type gas analysis system technical field, more particularly, relate to a kind of infrared gas analysis pretreatment system.
Background technology
Flue gas discharge continuous monitoring system can carry out real-time tracking and measuring continuously to the particle of fixed-contamination source emission and gaseous state pollutant levels and emission index, be widely used in the having stationary pollution source factory of (for example boiler, industry cellar for storing things stove and incinerator).
The infrared gas analysis pretreatment system is an important subsystem in the flue gas discharge continuous monitoring system, as shown in Figure 2, the infrared gas analysis pretreatment system mainly is made up of condensing unit, filtration unit, zero gas caliberating device, sampling apparatus and infrared gas analyzer.
Existing infrared gas analysis pretreatment system uses air to demarcate analysis as zero gas since air in the different location, the humiture of different time differs bigger, therefore causes measurement result to exist than large deviation.
Summary of the invention
In view of this, the invention reside in provides a kind of infrared gas analysis pretreatment system, to solve the bigger problem of prior art measurement result deviation.Technical scheme is as follows:
A kind of infrared gas analysis pretreatment system comprises: solenoid valve, condenser, filtrator, sampling pump and infrared gas analyzer; Wherein: described solenoid valve is provided with sample gas interface, air interface and condenser interface; One end of described condenser links to each other with described solenoid valve by described condenser interface, and the other end links to each other with an end of described sampling pump by described filtrator, and also is provided with freeing port on the described condenser; The other end of described sampling pump connects described infrared gas analyzer.
Preferably, in the above-mentioned infrared gas analysis pretreatment system, also comprise the peristaltic pump that joins with described condenser freeing port.
Preferably, in the above-mentioned infrared gas analysis pretreatment system, also comprise first valve on the associated line that is arranged on described sampling pump and analyser.
Preferably, in the above-mentioned infrared gas analysis pretreatment system, the condenser interface of described solenoid valve is connected described condenser with described sampling pump a end links to each other by associated line, and described associated line is provided with second valve.
By above technical scheme as can be seen, infrared gas analysis pretreatment system provided by the invention, air is carried out identical condensation process with sample gas, make the humidity of air and the humidity basically identical of sample gas, thereby reduced difference because of air humidity to the influence that measurement result causes, improved the accuracy of measurement result.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the measuring principle figure of infrared spectrum analyser;
Fig. 2 is the structural representation of the infrared gas analysis pretreatment system of prior art;
The structural representation of the infrared gas analysis pretreatment system that Fig. 3 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Infrared gas analyzer is the critical component of infrared gas analysis pretreatment system test section, and it is a kind of based on overstepping one's bounds infrared Absorption principle, is used for the instrument of gas concentrations such as detected gas SO2, NO, CO, CO2.Shown in figure, infrared gas analyzer comprises: infrared light supply 1., reflecting body 2., syncmotor 3., chopper 4., the sample air chamber 5., preceding absorption chamber 6., back absorption chamber 7., kapillary 8. with microflow sensor 9..
The infrared attenuation by absorption amount of the certain wavelength of infrared gas analyzer utilization is come the concentration value of measurement gas, and concrete testing process is as follows:
The infrared beam that 1. infrared light supply sends by reflecting body 2., 5. the sample air chamber arrive the test section, the sample air chamber 5. and infrared light supply a chopper that is 3. driven by syncmotor is arranged between 1., infrared beam is become light-pulse generator alternately; The test section is made up of former and later two absorption chambers, 6. absorption band core absorption chamber before detecting device at first is absorbed, 7. the marginal portion is then absorbed by the back absorption chamber, the absorption of front and back absorption chamber is roughly the same, and 9. 7. 6. and between the absorption chamber of back preceding absorption chamber link to each other by a microflow sensor.The pulse electrical signal of the generation by detecting microflow sensor just can obtain the relevant detection result.
In long-term production and research practice, the applicant utilizes existing infrared gas analysis pretreatment system, having done a large amount of experiments, and accumulated great deal of experiment data, will be that example illustrates that the applicant finds the process of prior art problem with once experiment wherein below:
Experiment one:
Experiment instrument: infrared gas analyzer;
Experiment condition: environment temperature: 22 ℃, envionmental humidity: 50%;
Experimentation:, measure with 100ppm SO2 and NO with air mark zero;
Measurement result sees Table 1.
Analyser measurement result under the table 1 traditional analysis system
As can be seen from Table 1: more near zero point measurement result deviation big more, more near 100ppm, the deviation of measurement result is more little, the deviation of visible measurement result mainly concentrates on the zone of (0-40) ppm.
And the reason that causes this phenomenon mainly is the point of instrument at 100ppm, be to use standard gas to demarcate, and is to demarcate with common air zero point, and the humidity of the humidity of normal air and standard gas differs bigger, thereby causes the deviation of measurement result.When low concentration (less than 50ppm) is measured, humidity influence the measurement that instrument is disturbed in meeting greatly.
This shows that being used to mark zero the air humidity and the humidity difference of standard gas or sample gas is to cause the main cause of measurement result deviation, eliminating this species diversity so is exactly the key of dealing with problems.The present invention just is being based on this thinking on the basis of existing infrared gas analysis pretreatment system, has done corresponding improvement, maximum limit reduce of the influence of humidity difference to measurement result.
As shown in Figure 3, the infrared gas analysis pretreatment system that provides of the embodiment of the invention can comprise:
From the foregoing description as can be seen, the infrared gas analysis pretreatment system that the embodiment of the invention provides, air is carried out identical condensation process with sample gas, make the humidity of air and the humidity basically identical of sample gas, thereby reduce the influence that the difference because of air humidity causes measurement result to greatest extent, improve the accuracy of measurement result.
Contrast existing infrared gas analysis pretreatment system, the present invention only adjusts the existing systems framework, increase system cost that can be not extra.
The infrared gas analysis pretreatment system that the applicant utilizes the embodiment of the invention to provide, under with experiment one identical experiment instrument and experiment condition, effect of the present invention is verified:
Experiment two:
Experiment instrument: infrared gas analyzer;
Experiment condition: environment temperature: 22 ℃, envionmental humidity: 50%; Experimentation: zero gas is measured with 100ppm SO2 and NO by condenser mark zero; Measurement result sees Table 2.
Table 2 with standardization zero gas mark zero the infrared analysis measuring results
As can be seen from Table 2: the measurement result of utilizing infrared gas analysis pretreatment system of the present invention to obtain, eliminated the influence of humidity basically to measurement result.
In one embodiment of the invention, referring to shown in Figure 2, infrared gas analysis pretreatment system provided by the present invention also comprises the peristaltic pump 6 that joins with described condenser 2 freeing port 21.In the actual measuring process, use peristaltic pump 6 can quicken the draining of condenser 2.
In other embodiments, infrared gas analysis pretreatment system provided by the invention also comprises first valve 7 on the associated line that is arranged on described sampling pump 4 and analyser 5.First valve 7 can be in testing process be regulated pipeline air pressure, guarantee carrying out smoothly of testing process.
In other embodiments, in the infrared gas analysis pretreatment system provided by the invention, the condenser interface 13 of described solenoid valve 1 is connected described condenser 2 with described sampling pump 4 a end links to each other by associated line, and described associated line is provided with second valve 8.Second valve 8 can be controlled the gas flow that enters in the analyser 5.
Need to prove, in this article, relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or in proper order between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Do not having under the situation of more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (4)
1. an infrared gas analysis pretreatment system is characterized in that, comprising: solenoid valve, condenser, filtrator, sampling pump and infrared gas analyzer; Wherein: described solenoid valve is provided with sample gas interface, air interface and condenser interface; One end of described condenser links to each other with described solenoid valve by described condenser interface, and the other end links to each other with an end of described sampling pump by described filtrator, and also is provided with freeing port on the described condenser; The other end of described sampling pump connects described infrared gas analyzer.
2. according to the described infrared gas analysis pretreatment system of claim 1, it is characterized in that, also comprise the peristaltic pump that joins with described condenser freeing port.
3. infrared gas analysis pretreatment system according to claim 2 is characterized in that, also comprises first valve on the associated line that is arranged on described sampling pump and analyser.
4. according to any described infrared gas analysis pretreatment system of claim 1-3, it is characterized in that, the condenser interface of described solenoid valve is connected described condenser with described sampling pump a end links to each other by associated line, and described associated line is provided with second valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100231568A CN102087179B (en) | 2011-01-20 | 2011-01-20 | Infrared gas analysis pretreatment system |
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| CN2011100231568A CN102087179B (en) | 2011-01-20 | 2011-01-20 | Infrared gas analysis pretreatment system |
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| CN102087179A true CN102087179A (en) | 2011-06-08 |
| CN102087179B CN102087179B (en) | 2012-11-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036994A (en) * | 2017-05-25 | 2017-08-11 | 北京雪迪龙科技股份有限公司 | A kind of non-dispersion infrared gas analyzer of dynamic reference and the method for detecting gas concentration |
| CN108982765A (en) * | 2018-07-03 | 2018-12-11 | 深圳智人环保科技有限公司 | Minitype gas detection system and method with temperature and humidity pretreatment and benchmark zeroing |
| CN109813593A (en) * | 2019-03-14 | 2019-05-28 | 中国船舶电站设备有限公司 | Pretreatment system and method for the detection of ship tail gas carbon dioxide content |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107036994A (en) * | 2017-05-25 | 2017-08-11 | 北京雪迪龙科技股份有限公司 | A kind of non-dispersion infrared gas analyzer of dynamic reference and the method for detecting gas concentration |
| CN108982765A (en) * | 2018-07-03 | 2018-12-11 | 深圳智人环保科技有限公司 | Minitype gas detection system and method with temperature and humidity pretreatment and benchmark zeroing |
| CN109813593A (en) * | 2019-03-14 | 2019-05-28 | 中国船舶电站设备有限公司 | Pretreatment system and method for the detection of ship tail gas carbon dioxide content |
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| CN102087179B (en) | 2012-11-14 |
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