CN102590447A - Method and equipment for calibrating dust-measuring instrument - Google Patents
Method and equipment for calibrating dust-measuring instrument Download PDFInfo
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- CN102590447A CN102590447A CN2012100092358A CN201210009235A CN102590447A CN 102590447 A CN102590447 A CN 102590447A CN 2012100092358 A CN2012100092358 A CN 2012100092358A CN 201210009235 A CN201210009235 A CN 201210009235A CN 102590447 A CN102590447 A CN 102590447A
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Abstract
The invention relates to a method and equipment for calibrating a dust-measuring instrument. Weighed test dust is dispersed and then fed into a self-circulation system with stable gas flow, so that flowing standard dust-containing gas with stable concentration is prepared; and standard dust-containing gas with different concentrations can be prepared just by changing the quantity of the fed dust, and the dust-measuring instrument to be calibrated can be rapidly and correctly calibrated. The equipment comprises the dust-measuring instrument (1), a self-circulation pipeline (2), a dust generating device (3), a flow measuring device (4), a flow velocity and pressure adjusting valve (5), a circulating fan (6), an air filter (7), an air heater (8), a switch valve, a dust collector (12), an exhaust fan (13), connecting pipelines between all devices, and the like. Compared with the prior art, the method and the equipment can rapidly and correctly calibrate the dust-measuring instrument, thereby greatly reducing the error of the dust-measuring instrument and enabling the measurement data of the dust-measuring instrument to be more real and reliable.
Description
Technical field
The present invention relates to instrument manufacturing and environmental protection field, especially relate to a kind of scaling method and equipment of dust gauge.
Background technology
The gas dust content is the dust quality in the unit gas volume.The mensuration of dust content has two kinds of methods at present in all kinds of room airs, outside atmosphere and the flue gas: the first, direct method is a weight method.Dusty gas is filtered, then cartridge filter or filter paper are weighed, the gas flow that combination has at last been measured calculates the dust content of gas.The second, indirect method, at present commonly used have light scattering method and an electrostatic induction method.Light scattering method be with Laser emission to dusty gas, confirm the gas dust content by the intensity variations that receives; Therefore and the dust content of definite gas the electrostatic induction method is to electrically contact or through near the insulated metal electrode time, produce induction electromotive force in electrode interior when dust charge, and this electromotive force is directly proportional with dust content.The indirect method dust gauge must be demarcated through direct method at present.
The sampling time of direct method is difference according to the height of gas dust content, and the gas dust content that generally need 15～20min, that is direct method measures is the mean value in the sampling time, though data accurately and reliably, can't realize METHOD FOR CONTINUOUS DETERMINATION.Indirect method can realize the METHOD FOR CONTINUOUS DETERMINATION of gas dust content; But its error at measurment is improved greatly because of it relies on direct method to demarcate and carry out the arithmetic mean deal with data; According to standard No. is People's Republic of China's environmental protection industry standard " fixed pollution source smoke discharge continuous monitoring technical manual (the trying) " regulation of HJ/T75-2007, the fixed pollution source smoke discharge continuous monitor system check and accept adopt above-mentioned direct method, its performance assessment criteria be relative error be no more than ± 30%; Obviously; This error is too big, but receives the restriction of art methods, also can only so stipulate.
Can know from the above situation,, limit, cause the permissible error of dust gauge bigger than normal, have a strong impact on it and measure precision because of scaling method though existing dust gauge can be realized METHOD FOR CONTINUOUS DETERMINATION.
Summary of the invention
The object of the invention be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of make dust gauge can be in real time, the scaling method and the equipment of the dust gauge demarcated fast and accurately.
The object of the invention can be realized through following technical scheme:
A kind of scaling method of dust gauge; With sending in the stable self-circulation system of gas flow after the load weighted test dust dispersion; Produce a kind of mobile and dusty gas concentration stabilize; Make the dust gauge that places this system can obtain demarcating fast and accurately, place this system to demarcate dust gauge then, can make the calibration curve of dust gauge fast and accurately.
Change the Dust Capacity of sending in the self-circulation system and can produce the different standard dusty gas of dust content.
The actual dust that utilizes the dust gauge workplace can improve the stated accuracy of dust gauge as the test dust.
A kind of equipment of realizing scaling method; Comprise the connecting tube between dust gauge, self-loopa pipeline, a dirt device, flow measurement device, flow velocity and pressure-regulating valve door, circulating fan, air strainer, air heater, switch valve, fly-ash separator, exhaust blower and each device; The outlet of described circulating fan is communicated with through the self-loopa pipeline with import; The self-loopa that realizes gas is flowed; Described dust gauge, a dirt device are connected with the self-loopa pipeline; Described flow measurement device, flow velocity and pressure-regulating valve door are installed on the self-loopa pipeline, and air strainer is connected with air heater after valve is connected with the self-loopa pipeline, and the exit of circulating fan also connects fly-ash separator and exhaust blower through connecting tube successively.
Described control valve is positioned at the import of circulating fan, and gas flow rate in the self-circulation system and pressure are regulated.
Described switch valve is provided with three, and one is connected with air heater, and two outlets that are positioned at circulating fan in addition during off-test, are discharged the dusty gas in the self-circulation system through the switching of valve.
Described dust gauge is for adopting the instrument of indirect method METHOD FOR CONTINUOUS DETERMINATION gas dust content; Described dirt device fully disperses dust, is in uniform suspended state after making dust get into self-circulation system.
Described flow measurement device is measured the flow of dusty gas, goes out the gas dust content in conjunction with the dust Mass Calculation; Described air strainer makes the air that gets into self-circulation system obtain secondary filter, improves the measuring accuracy of gas dust content; Described air heater makes the air that gets into self-circulation system become dry, is beneficial to the suspension of dust.
The self-circulation system inwall that described circulating fan, self-loopa pipeline, flow velocity and pressure-regulating valve door, switch valve and flow measurement device are formed all sprays teflon, increases the smooth finish and the electrostatic-proof function of inwall.
After rating test finishes, dusty gas is discharged self-circulation system and obtain filtration, make the air quality that enters in the atmosphere meet discharging standards through fly-ash separator and exhaust blower.
Compared with prior art, the present invention can make dust gauge demarcated fast and accurately, and the relative error of dust gauge is no more than ± and 10%, compared with prior art relative error reduces significantly, makes the determination data of dust gauge more true and reliable.
Description of drawings
Fig. 1 is the structural representation of this device.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
A kind of caliberating device of dust gauge; Its technological process is as shown in Figure 1, and this device comprises the dust gauge 1, the self-loopa pipeline 2 that need to be demarcated, sends out dirt device 3, flow measurement device 4, flow velocity and pressure-regulating valve door 5, the connecting tube between circulating fan 6, air strainer 7, air heater 8, first switch valve 9, second switch valve 10 and the 3rd switch valve 11, fly-ash separator 12, exhaust blower 13 and each equipment etc.
The outlet of circulating fan 6 is communicated with through self-loopa pipeline 2 with import; The self-loopa that realizes gas is flowed; Dust gauge 1, a dirt device 3 are connected with self-loopa pipeline 2; Flow measurement device 4, flow velocity and pressure-regulating valve door 5 are installed on the self-loopa pipeline 2, and air strainer 7 is connected with air heater 8 after valve is connected with self-loopa pipeline 2, and the exit of circulating fan 6 also connects fly-ash separator 12 and exhaust blower 13 through connecting tube successively.
Wherein, flow velocity and pressure-regulating valve door 5 are positioned at the import of circulating fan 6, and gas flow rate in the self-circulation system and pressure are regulated.Switch valve is provided with three, and first switch valve 9 is connected with air heater 8, and second switch valve 10 and the 3rd switch valve 11 are positioned at the outlet of circulating fan 6, during off-test, through the switching of valve the dusty gas in the self-circulation system is discharged.Dust gauge 1 is for adopting the instrument of indirect method METHOD FOR CONTINUOUS DETERMINATION gas dust content.Send out dirt device 3 dust is fully disperseed, be in uniform suspended state after making dust get into self-circulation system.Flow measurement device 4 is measured the flow of dusty gas, goes out the gas dust content in conjunction with the dust Mass Calculation.Air strainer 7 makes the air that gets into self-circulation system obtain secondary filter, improves the measuring accuracy of gas dust content.Air heater 8 makes the air that gets into self-circulation system become dry, is beneficial to the suspension of dust.The self-circulation system inwall that circulating fan 6, self-loopa pipeline 2, flow velocity and pressure-regulating valve door 5, switch valve and flow measurement device 4 are formed all sprays teflon, increases the smooth finish and the electrostatic-proof function of inwall.
Dusty gas is discharged self-circulation system and obtain filtration through fly-ash separator 12 and exhaust blower 13, make the air quality that enters in the atmosphere meet discharging standards.
Before the dust gauge rating test formally begins; Open the control valve 5 and first switch valve 9 and the 3rd switch valve 11; Second switch valve 10 is closed, and heater 8, circulating fan 6 and exhaust blower 13 are purified and drying the air in the calibration system then.After rating test begins; Close first switch valve 9 and the 3rd switch valve 11 and exhaust blower 13; Open second switch valve 10, circulating fan keeps operation, the aperture of flow velocity and pressure-regulating valve door 5 is regulated reach the gas flow rate that needs; Then load weighted test dust is sent in the self-loopa pipeline 2 through sending out the dirt device; Treat that gas dust content in the self-circulation system can demarcate data to dust gauge after stable, change the test Dust Capacity of sending into and can obtain different nominal datas, five and more than such nominal data can simulate corresponding calibration equation and curve.After rating test finishes, close second switch valve 10, open first switch valve 9 and the 3rd switch valve 11 and exhaust blower 13, make the dusty gas in the self-circulation system discharge and be purified, pure with in the maintenance self-circulation system.
A kind of scaling method of dust gauge is to send in the stable self-circulation system of gas flow after load weighted test dust is disperseed; Thereby produce a kind of mobile and standard dusty gas concentration stabilize, change the standard dusty gas that the Dust Capacity of sending into can produce different dust contents; Place this system to demarcate dust gauge then, can make the calibration curve of dust gauge fast and accurately.
Claims (10)
1. the scaling method of a dust gauge; It is characterized in that; This method is sent in the stable self-circulation system of gas flow after load weighted test dust is disperseed, and produces a kind of mobile and dusty gas concentration stabilize, and the dust gauge that places this system can be obtained fast and accurate the demarcation; Place this system to demarcate dust gauge then, can make the calibration curve of dust gauge fast and accurately.
2. the scaling method of a kind of dust gauge according to claim 1 is characterized in that, changes the Dust Capacity of sending in the self-circulation system and can produce the different standard dusty gas of dust content.
3. the scaling method of a kind of dust gauge according to claim 1 is characterized in that, the actual dust that utilizes the dust gauge workplace can improve the stated accuracy of dust gauge as the test dust.
4. equipment of realizing the said scaling method of claim 1; It is characterized in that; This equipment comprises the connecting tube between dust gauge (1), self-loopa pipeline (2), a dirt device (3), flow measurement device (4), flow velocity and pressure-regulating valve door (5), circulating fan (6), air strainer (7), air heater (8), switch valve, fly-ash separator (12), exhaust blower (13) and each device; The outlet of described circulating fan (6) is communicated with through self-loopa pipeline (2) with import; The self-loopa that realizes gas is flowed; Described dust gauge (1), a dirt device (3) are connected with self-loopa pipeline (2); Described flow measurement device (4), flow velocity and pressure-regulating valve door (5) are installed on the self-loopa pipeline (2), and air strainer (7) is connected with air heater (8) after valve is connected with self-loopa pipeline (2), and the exit of circulating fan (6) also connects fly-ash separator (12) and exhaust blower (13) through connecting tube successively.
5. the caliberating device of a kind of dust gauge according to claim 4 is characterized in that, described flow velocity and pressure-regulating valve door (5) are positioned at the import of circulating fan (6), and gas flow rate in the self-circulation system and pressure are regulated.
6. the caliberating device of a kind of dust gauge according to claim 4; It is characterized in that; Described switch valve is provided with three, and one is connected with air heater (8), two outlets that are positioned at circulating fan (6) in addition; During off-test, the dusty gas in the self-circulation system is discharged through the switching of valve.
7. the caliberating device of a kind of dust gauge according to claim 4 is characterized in that, described dust gauge (1) is for adopting the instrument of indirect method METHOD FOR CONTINUOUS DETERMINATION gas dust content; Described dirt device (3) fully disperses dust, is in uniform suspended state after making dust get into self-circulation system.
8. the caliberating device of a kind of dust gauge according to claim 4 is characterized in that, described flow measurement device (4) is measured the flow of dusty gas, goes out the gas dust content in conjunction with the dust Mass Calculation; Described air strainer (7) makes the air that gets into self-circulation system obtain secondary filter, improves the measuring accuracy of gas dust content; Described air heater (8) makes the air that gets into self-circulation system become dry, is beneficial to the suspension of dust.
9. the caliberating device of a kind of dust gauge according to claim 4; It is characterized in that; The self-circulation system inwall that described circulating fan (6), self-loopa pipeline (2), flow velocity and pressure-regulating valve door (5), switch valve and flow measurement device (4) are formed all sprays teflon, increases the smooth finish and the electrostatic-proof function of inwall.
10. the caliberating device of a kind of dust gauge according to claim 4; It is characterized in that; After rating test finishes, dusty gas is discharged self-circulation system and obtain filtration, make the air quality that enters in the atmosphere meet discharging standards through fly-ash separator (12) and exhaust blower (13).
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| CN2012100092358A CN102590447A (en) | 2012-01-12 | 2012-01-12 | Method and equipment for calibrating dust-measuring instrument |
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| CN2012100092358A CN102590447A (en) | 2012-01-12 | 2012-01-12 | Method and equipment for calibrating dust-measuring instrument |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830047A (en) * | 2012-08-28 | 2012-12-19 | 中煤科工集团重庆研究院 | Circulating dust generating device |
| CN103111149A (en) * | 2013-01-25 | 2013-05-22 | 广东电网公司电力科学研究院 | Electric bag composite dust removal grading efficiency test device and method |
| CN103913406A (en) * | 2014-04-04 | 2014-07-09 | 北京西山新干线环保设备有限公司 | Automatic calibration method for beta absorption-type dust measurement instrument |
| CN104880393A (en) * | 2015-07-01 | 2015-09-02 | 重庆大学 | Device and method for measuring PM 2.5 of specific places |
| CN104990846A (en) * | 2015-06-24 | 2015-10-21 | 江苏大学 | Calibration method for medicine powder aerosol concentration sensor |
| CN105004648A (en) * | 2015-06-24 | 2015-10-28 | 江苏大学 | Calibration testing apparatus for medicinal powder aerosol concentration sensor |
| CN105021503A (en) * | 2015-08-18 | 2015-11-04 | 上海天石测控设备有限公司 | Dust concentration calibrating system and method suitable for photoelectric method dust concentration detector |
| CN107389865A (en) * | 2017-07-19 | 2017-11-24 | 苏州曼德克光电有限公司 | A kind of smoke dust in flue, smoke diffusing simulating device |
| CN107860692A (en) * | 2017-11-01 | 2018-03-30 | 缪荣明 | Dust concentration caliberating device and scaling method in dust work environment |
| CN109323968A (en) * | 2018-12-17 | 2019-02-12 | 北京理工大学 | A kind of calibration system and its method applied to dust cloud cluster distribution of concentration |
| CN109682625A (en) * | 2018-12-26 | 2019-04-26 | 东莞市宇洁新材料有限公司 | A kind of stable air purifier test equipment |
| CN111589249A (en) * | 2020-06-01 | 2020-08-28 | 中铁十六局集团置业投资有限公司 | Building engineering is with portable intelligent dust fall equipment |
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| US20030029221A1 (en) * | 2001-01-23 | 2003-02-13 | Juneau Phillip J. | Device and method for introducing a known dust concentration spike for calibrating particulate matter continuous emission monitoring systems |
| CN201378137Y (en) * | 2009-03-11 | 2010-01-06 | 江苏三恒科技集团有限公司 | Testing wind tunnel of dust sensor |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830047A (en) * | 2012-08-28 | 2012-12-19 | 中煤科工集团重庆研究院 | Circulating dust generating device |
| CN103111149A (en) * | 2013-01-25 | 2013-05-22 | 广东电网公司电力科学研究院 | Electric bag composite dust removal grading efficiency test device and method |
| CN103111149B (en) * | 2013-01-25 | 2015-04-22 | 广东电网公司电力科学研究院 | Electric bag composite dust removal grading efficiency test device and method |
| CN103913406A (en) * | 2014-04-04 | 2014-07-09 | 北京西山新干线环保设备有限公司 | Automatic calibration method for beta absorption-type dust measurement instrument |
| CN103913406B (en) * | 2014-04-04 | 2016-01-27 | 北京西山新干线环保设备有限公司 | The absorption dust gauge automatic marking method of β |
| CN104990846B (en) * | 2015-06-24 | 2017-12-29 | 江苏大学 | A kind of scaling method of medicinal powder aerosol concentration sensor |
| CN104990846A (en) * | 2015-06-24 | 2015-10-21 | 江苏大学 | Calibration method for medicine powder aerosol concentration sensor |
| CN105004648A (en) * | 2015-06-24 | 2015-10-28 | 江苏大学 | Calibration testing apparatus for medicinal powder aerosol concentration sensor |
| CN105004648B (en) * | 2015-06-24 | 2018-01-23 | 江苏大学 | A kind of medicinal powder aerosol concentration transducer calibration experimental rig |
| CN104880393A (en) * | 2015-07-01 | 2015-09-02 | 重庆大学 | Device and method for measuring PM 2.5 of specific places |
| CN105021503A (en) * | 2015-08-18 | 2015-11-04 | 上海天石测控设备有限公司 | Dust concentration calibrating system and method suitable for photoelectric method dust concentration detector |
| CN107389865A (en) * | 2017-07-19 | 2017-11-24 | 苏州曼德克光电有限公司 | A kind of smoke dust in flue, smoke diffusing simulating device |
| CN107389865B (en) * | 2017-07-19 | 2023-12-12 | 苏州曼德克光电有限公司 | Smoke and dust and smoke flow field simulator in flue |
| CN107860692A (en) * | 2017-11-01 | 2018-03-30 | 缪荣明 | Dust concentration caliberating device and scaling method in dust work environment |
| CN109323968A (en) * | 2018-12-17 | 2019-02-12 | 北京理工大学 | A kind of calibration system and its method applied to dust cloud cluster distribution of concentration |
| CN109682625A (en) * | 2018-12-26 | 2019-04-26 | 东莞市宇洁新材料有限公司 | A kind of stable air purifier test equipment |
| CN111589249A (en) * | 2020-06-01 | 2020-08-28 | 中铁十六局集团置业投资有限公司 | Building engineering is with portable intelligent dust fall equipment |
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Application publication date: 20120718 |