CN104122180A - Method for measuring mass concentration of particulate matter - Google Patents

Method for measuring mass concentration of particulate matter Download PDF

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Publication number
CN104122180A
CN104122180A CN201410345559.8A CN201410345559A CN104122180A CN 104122180 A CN104122180 A CN 104122180A CN 201410345559 A CN201410345559 A CN 201410345559A CN 104122180 A CN104122180 A CN 104122180A
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light scattering
module
calibration
filter membrane
particle
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CN201410345559.8A
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CN104122180B (en
Inventor
王桐
霍昱
何春雷
曹莉
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Qingdao Zhongrui Intelligent Instrument Co.,Ltd.
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QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT CO Ltd
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Abstract

The invention relates to a method for measuring the mass concentration of a particulate matter. A processor controls a sampling pump so that airflow enters from a particulate matter collecting unit, atmospheric particulate matter information is acquired, whether an instrument needs to be calibrated is judged, a beta-ray calibration module is started to calibrate the parameter values of a light scattering measurement module if calibration is needed, and the light scattering measurement module is turned on after the parameters are calibrated; and if calibration is not needed, the light scattering measurement module directly carries out measurement. By combining a light scattering method for measuring the concentration of the particulate matter with a beta-ray method, the measurement is accurate and data are directly read on line in real time; the beta-ray calibration module and the light scattering measurement module share one gas path, so as to ensure that various conditions in the calibration process are consistent and reduce error factors; and the parameters of the light scattering measurement module are calibrated by using the beta-ray calibration module when the measurement environment is changed, and the light scattering measurement module is separately utilized to measure the concentration of the particulate matter when the measurement environment is not changed.

Description

A kind of method of measuring particle quality concentration
Technical field
The present invention relates to a kind of method of measuring particle quality concentration, belong to measuring concentration of granules in certain field.
Background technology
Because the environmental pollution that the pollution source such as Industrial Boiler, boiler of power plant and Industrial Stoves cause is quite serious, countries in the world all conduct in-depth research this and are controlled, and this just need to detect the particle dust concentration of its discharge.Conventional detection method has light scattering method, β attenuation sensors, opaque method, optical transmission method etc. at present.
Wherein light scattering ratio juris is: from the light beam irradiates of light source in a certain space (measurement zone) of containing particle to be measured, thereby generation scattering, scattered light becomes electric signal after photelectric receiver conversion, after amplifier amplifies, can calculate according to light scattering theory the mass concentration of measurement zone endoparticle thing.These computing method are subject to the impact of particle diameter distribution, the refractive index etc. of variable grain thing, therefore need parameter to be calibrated in good time.Light scattering method is measured accurately, precision is high, reproducible, and measuring speed is fast, for online direct reading measurement mode, without sampling, can real-time continuous provides the instantaneous value of particle concentration; But light scattering method is limited to purity and the particle size of particle, kind or the particle size range of particle change, and all can cause the change of parameter value.Therefore,, in the time that measurement environment changes, need to revise parameter value.
β radiation absorption ratio juris is: the β ray that send in constant β source of intensity is during by medium, the mutual collision loss energy of electronics in β particle and medium and being absorbed.Under low-energy condition, degree of absorption depends on the quality of medium, irrelevant with granularity, composition, color and disperse state of powder dust particle etc.β ray successively, through cleaning filter paper (not gathering dirt sample) and having adopted dirt sample filter paper (same filter paper), is asked for dust concentration in environment according to the difference of 2 β ray amounts of being absorbed.β attenuation sensors is not subject to dust kind, granularity, the impact of the factors such as dispersion degree, shape, color, gloss; Measurement result can with classical standard method-weight method equivalence; It can reduce processing time and the contaminated chance of sample, can not bring personal error and error free accumulation, does not need often calibration and zeroing.It is more a kind of in the indirect measurement method of dust concentration.But it is non-direct access mode, and a period of time interval just provides measurement data.
Also there are the problems referred to above in the additive methods such as opaque method, optical transmission method, does not also have at present a kind of method can avoid environment particle impact, frequently parameter value calibrated, again can real-time online read particle concentration value.
Summary of the invention
The object of the invention is to overcome the shortcoming existing in prior art, provide one can avoid environment particle impact, frequently parameter value is calibrated, the method for the measurement particle quality concentration that reads particle concentration value that again can real-time online.
Object of the present invention realizes by following scheme: a kind of method of measuring particle quality concentration, processor control sampling pump makes air-flow enter from particle collector unit, collect Atmospheric particulates information and judge whether to calibrate instrument, if need calibration, start β ray calibration module, parameter value to light scattering measurement module is calibrated, and treats to open light scattering measurement module after parametric calibration again; If do not needed calibration, directly to measure by light scattering measurement module, measurement result is shown by input/output module; Input/output module, atmosphere pressure sensor, Temperature Humidity Sensor are connected with processor; Described particle collector unit comprises PM2.5/PM10 cutter, high efficiency particulate air filter and the solenoid valve being connected with both; Described β ray calibration module comprises filter membrane and the β source being connected with filter membrane, β ray detector and filter membrane conversion motor; Described light scattering measurement module comprises optical detection chamber and the light source being attached thereto, light scattering detector; The optical detection chamber of described PM2.5/PM10 cutter, solenoid valve, light scattering measurement module, filter membrane, the sampling pump of β ray calibration module are arranged in same gas circuit.
Further, described light source is White LED light source, and described light scattering detector is photomultiplier; Described light scattering measurement module makes light scattering measurement module keep identical with precision and the range of β ray calibration module by the luminous intensity of controlling light source with the gain amplifier of amplifier in its module.
Further, described solenoid valve is connected high efficiency particulate air filter in the time of school zero, removes the particle in atmosphere, ensures school zero precision; In the time measuring particle concentration, connect PM2.5/PM10 cutter.
Further, described filter membrane conversion motor, for changing the angle of filter membrane, in the time of calibration, makes filter membrane perpendicular to gas circuit, and particle can be deposited on filter membrane for the follow-up calibration of weighing; In the time measuring particle concentration, make filter membrane direction parallel with gas circuit, ensure the unimpeded of gas circuit.
Further, described β source is C14 radioactive source, and β ray detector is fluoroscopic examination photomultiplier.
Further, between the filter membrane of described β ray calibration module and sampling pump, be also provided with flowmeter.
The invention has the beneficial effects as follows: light scattering method is measured to particle concentration and combine with β rays method, make it to have concurrently the accurate and online real-time direct-reading data of measurement; For ensureing the consistance of measurement result, β ray calibration module, light scattering measurement module share a set of gas circuit, thereby ensure two modules various term harmonizations in service in calibration process, reduce error component; Simultaneously in the time that measurement environment changes, utilize β ray calibration module to calibrate the parameter of light scattering measurement module, and measurement environment is not while changing, utilizes separately light scattering measurement module to carry out the measurement of particle concentration.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Fig. 1 is structural representation of the present invention.
In figure: 1, PM2.5/PM10 cutter, 2, solenoid valve, 3, optical detection chamber, 4, light source, 5, filter membrane, 6, β source, 7, flowmeter, 8, sampling pump, 9, filter membrane conversion motor, 10, β ray detector, 11, light scattering detector, 12, high efficiency particulate air filter, 13, processor, 14, input/output module, 15, Temperature Humidity Sensor, 16, atmosphere pressure sensor.
Embodiment
A kind of method of measuring particle quality concentration as shown in Figure 1, processor 13 is controlled sampling pump 8 makes air-flow enter from particle collector unit, collect Atmospheric particulates information and judge whether to calibrate instrument, if need calibration, start β ray calibration module, parameter value to light scattering measurement module is calibrated, and treats to open light scattering measurement module after parametric calibration again; If do not needed calibration, directly to measure by light scattering measurement module, measurement result is shown by input/output module 14; Input/output module 14, atmosphere pressure sensor 16, Temperature Humidity Sensor 15 connect processor 13; Described particle collector unit comprises PM2.5/PM10 cutter 1, high efficiency particulate air filter 12 and the solenoid valve 2 being connected with both; Described β ray calibration module comprises filter membrane 5 and the β source 6 being connected with filter membrane, β ray detector 10 and filter membrane conversion motor 9; Light source 4, light scattering detector 11 that described light scattering measurement module comprises optical detection chamber 3 and is attached thereto; The optical detection chamber 3 of described PM2.5/PM10 cutter 1, solenoid valve 2, light scattering measurement module, the filter membrane 5 of β ray calibration module, sampling pump 8 are arranged in same gas circuit.
Further, described light source 4 is White LED light source, and described light scattering detector 11 is photomultiplier; Described light scattering measurement module makes light scattering measurement module keep identical with precision and the range of β ray calibration module by the luminous intensity of controlling light source 4 with the gain amplifier of amplifier in its module.
Further, described solenoid valve 2 is connected high efficiency particulate air filter 12 in the time of school zero, removes the particle in atmosphere, ensures school zero precision; In the time measuring particle concentration, connect PM2.5/PM10 cutter 1.
Further, described filter membrane conversion motor 9, for changing the angle of filter membrane 5, in the time of calibration, makes filter membrane 5 perpendicular to gas circuit, and particle can be deposited on filter membrane 5 for the follow-up calibration of weighing; In the time measuring particle concentration, make filter membrane 5 directions parallel with gas circuit, ensure the unimpeded of gas circuit.
Further, described β source 6 is C14 radioactive source, and β ray detector 10 is fluoroscopic examination photomultiplier.
Further, between the filter membrane 5 of described β ray calibration module and sampling pump 8, be also provided with flowmeter 7.
For ensureing the consistance of two module measurement results in calibration process, in the present invention, β ray calibration module, light scattering measurement module share a set of gas circuit, air-flow is under the effect of sampling pump 8, enter from PM2.5/PM10 cutter 1, pass through successively optical detection chamber 3, filter membrane 5, flowmeter 7, thereby ensure that the measuring object of two modules is with one air-flow, realize thus the detection consistance in above-mentioned.
Described solenoid valve 2, under the control of processor 13, can complete the conversion of inlet air flow from PM2.5/PM10 cutter 1 to high efficiency particulate air filter 12, automatically connects high efficiency particulate air filter 12 in the time of school zero, removes the particle in atmosphere, ensures school zero precision; In the time measuring particle concentration, automatically connect PM2.5/PM10 cutter 1.
Described filter membrane conversion motor 9, under the control of processor 13, can be realized the change of the filter membrane angle in gas circuit: in the time that needs are calibrated, make filter membrane 5 perpendicular to gas circuit, particle can be deposited on filter membrane 5, for the follow-up calibration of weighing; In the time of normal measurement particle concentration, make filter membrane 5 directions parallel with gas circuit, ensure the unimpeded of gas circuit.Described light source 4 is White LED light source, and described light scattering detector 11 is photomultiplier.Described beta ray source 4 is C14 radioactive source, and β-ray detector 10 is fluoroscopic examination photomultiplier.For ensureing that described calibration module and detection module have identical precision and range, can control by controlling the luminous intensity of light source 4 and the gain amplifier of follow up amplifier.Described processor 13 drives the human-computer interaction module such as LCD display, keyboard.
In Atmospheric particulates detect, meteorologic parameter has a certain impact to testing result, and what be connected with processor 13 has Temperature Humidity Sensor 15, atmosphere pressure sensor 16 real time record meteorologic parameters, for checking and data correction.In the time that changing, measurement environment utilize β ray calibration module to calibrate the parameter of light scattering measurement module, and measurement environment is not while changing, utilize separately light scattering measurement module to carry out the measurement of particle concentration, both can ensure the degree of accuracy of particle concentration, direct-reading online again, real-time continuous goes out measurement result.
The foregoing is only preferred embodiment of the present invention, is only illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and in the spirit and scope that limit, can carry out many changes to it in the claims in the present invention, amendment, and even equivalence, but all will fall within the scope of protection of the present invention.

Claims (6)

1. measure the method for particle quality concentration for one kind, it is characterized in that: processor (13) is controlled sampling pump (8) makes air-flow enter from particle collector unit, collect Atmospheric particulates information and judge whether to calibrate instrument, if need calibration, start β ray calibration module, parameter value to light scattering measurement module is calibrated, and treats to open light scattering measurement module after parametric calibration again; If do not needed calibration, directly to measure by light scattering measurement module, measurement result is shown by input/output module (14); Input/output module (14), Temperature Humidity Sensor (15), atmosphere pressure sensor (16) connect processor (13); Described particle collector unit comprises PM2.5/PM10 cutter (1), high efficiency particulate air filter (12) and the solenoid valve (2) being connected with both; Described β ray calibration module comprises filter membrane (5) and the β source (6) being connected with filter membrane, β ray detector (10) and filter membrane conversion motor (9); Light source (4), light scattering detector (11) that described light scattering measurement module comprises optical detection chamber (3) and is attached thereto; The optical detection chamber (3) of described PM2.5/PM10 cutter (1), solenoid valve (2), light scattering measurement module, the filter membrane (5) of β ray calibration module, sampling pump (8) are arranged in same gas circuit.
2. the method for measurement particle quality concentration according to claim 1, is characterized in that: described light source (4) is White LED light source, and described light scattering detector (11) is photomultiplier; Described light scattering measurement module makes light scattering measurement module keep identical with precision and the range of β ray calibration module by the luminous intensity of controlling light source (4) with the gain amplifier of amplifier in its module.
3. the method for measurement particle quality concentration according to claim 1, is characterized in that: described solenoid valve (2) is connected high efficiency particulate air filter (12) in the time of school zero, removes the particle in atmosphere, ensures school zero precision; In the time measuring particle concentration, connect PM2.5/PM10 cutter (1).
4. the method for measurement particle quality concentration according to claim 1, it is characterized in that: described filter membrane conversion motor (9) is for changing the angle of filter membrane (5), in the time of calibration, make filter membrane (5) perpendicular to gas circuit, particle can be deposited on filter membrane (5) for the follow-up calibration of weighing; In the time measuring particle concentration, make filter membrane (5) direction parallel with gas circuit, ensure the unimpeded of gas circuit.
5. the method for measurement particle quality concentration according to claim 1, is characterized in that: described β source (6) is C14 radioactive source, and β ray detector (10) is fluoroscopic examination photomultiplier.
6. the method for measurement particle quality concentration according to claim 1, is characterized in that: between the filter membrane (5) of described β ray calibration module and sampling pump (8), be also provided with flowmeter (7).
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Cited By (13)

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Publication number Priority date Publication date Assignee Title
CN104458522A (en) * 2014-11-27 2015-03-25 中盟科创(深圳)科技发展有限公司 Atmospheric particulate detection system based on mobile terminal and detection method
CN105135897A (en) * 2015-09-10 2015-12-09 湖南长重机器股份有限公司 Self-adjusting system and method for PM 2.5 flue gas flow fields
CN105334147A (en) * 2015-12-04 2016-02-17 深圳睿境环保科技有限公司 Online particle monitoring system and method based on beta ray method and light scattering method
CN105527208A (en) * 2016-01-27 2016-04-27 北京市环境保护监测中心 Correction method for mass concentration data of atmospheric particulates
CN105842136A (en) * 2016-05-09 2016-08-10 上海卫东信息科技有限公司 Air particulate matter concentration monitoring device and detection method thereof
CN105865997A (en) * 2016-06-07 2016-08-17 中国科学院合肥物质科学研究院 Atmospheric raise dust concentration measuring device and method based on forward scattering principle
CN106777864A (en) * 2016-11-11 2017-05-31 浙江大学 A kind of calibration method of inexpensive PM2.5 monitoring nodes
CN107014725A (en) * 2017-03-20 2017-08-04 中国环境科学研究院 It is a kind of to handle method and a kind of method calibrated outside the venue by calibration dirt film that filter membrane obtains calibrating dirt film
CN107607449A (en) * 2017-08-21 2018-01-19 黑龙江科技大学 A kind of device and method for detecting particulate matter quality concentration
CN108303359A (en) * 2018-02-07 2018-07-20 合肥福瞳光电科技有限公司 The two-parameter monitor of Atmospheric particulates list sampling channel and monitoring method
CN108645767A (en) * 2018-05-02 2018-10-12 华中科技大学 A method of coupling light scattering and beta-ray measurement coal-fired flue-gas particulate matter quality concentration
RU2709410C1 (en) * 2018-10-03 2019-12-17 Общество с ограниченной ответственностью "Унискан-Ризерч" Meter, system and method of measuring mass concentration of dust particles
US10527596B2 (en) * 2015-11-26 2020-01-07 Fujitsu Limited Calculation device and calculation method

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104458522A (en) * 2014-11-27 2015-03-25 中盟科创(深圳)科技发展有限公司 Atmospheric particulate detection system based on mobile terminal and detection method
CN105135897A (en) * 2015-09-10 2015-12-09 湖南长重机器股份有限公司 Self-adjusting system and method for PM 2.5 flue gas flow fields
CN105135897B (en) * 2015-09-10 2018-02-13 湖南长重机器股份有限公司 A kind of PM2.5 flue gas flow fields self-adjusting system and its method
US10527596B2 (en) * 2015-11-26 2020-01-07 Fujitsu Limited Calculation device and calculation method
CN105334147A (en) * 2015-12-04 2016-02-17 深圳睿境环保科技有限公司 Online particle monitoring system and method based on beta ray method and light scattering method
CN105527208A (en) * 2016-01-27 2016-04-27 北京市环境保护监测中心 Correction method for mass concentration data of atmospheric particulates
CN105842136A (en) * 2016-05-09 2016-08-10 上海卫东信息科技有限公司 Air particulate matter concentration monitoring device and detection method thereof
CN105865997A (en) * 2016-06-07 2016-08-17 中国科学院合肥物质科学研究院 Atmospheric raise dust concentration measuring device and method based on forward scattering principle
CN106777864A (en) * 2016-11-11 2017-05-31 浙江大学 A kind of calibration method of inexpensive PM2.5 monitoring nodes
CN107014725B (en) * 2017-03-20 2019-07-16 中国环境科学研究院 A kind of processing filter membrane obtains calibrating the method and a kind of method calibrated outside the venue by calibration dirt film of dirt film
CN107014725A (en) * 2017-03-20 2017-08-04 中国环境科学研究院 It is a kind of to handle method and a kind of method calibrated outside the venue by calibration dirt film that filter membrane obtains calibrating dirt film
CN107607449A (en) * 2017-08-21 2018-01-19 黑龙江科技大学 A kind of device and method for detecting particulate matter quality concentration
CN108303359A (en) * 2018-02-07 2018-07-20 合肥福瞳光电科技有限公司 The two-parameter monitor of Atmospheric particulates list sampling channel and monitoring method
CN108303359B (en) * 2018-02-07 2021-05-14 合肥福瞳光电科技有限公司 Atmospheric particulate matter single sampling channel double-parameter monitor and monitoring method
CN108645767A (en) * 2018-05-02 2018-10-12 华中科技大学 A method of coupling light scattering and beta-ray measurement coal-fired flue-gas particulate matter quality concentration
RU2709410C1 (en) * 2018-10-03 2019-12-17 Общество с ограниченной ответственностью "Унискан-Ризерч" Meter, system and method of measuring mass concentration of dust particles
WO2020071964A1 (en) * 2018-10-03 2020-04-09 Общество с ограниченной ответственностью "Унискан-Ризерч" Measuring device, system and method for measuring a mass concentration of dust particles

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