CN104792676A - Method for measuring nanoparticle concentration of air with ionization method - Google Patents
Method for measuring nanoparticle concentration of air with ionization method Download PDFInfo
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- CN104792676A CN104792676A CN201510203727.4A CN201510203727A CN104792676A CN 104792676 A CN104792676 A CN 104792676A CN 201510203727 A CN201510203727 A CN 201510203727A CN 104792676 A CN104792676 A CN 104792676A
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Abstract
The invention discloses a method for measuring the nanoparticle concentration of air with an ionization method. The method comprises the following steps: a device providing clean air outputs clean airflow to a sensor main body; when the airflow passes through a narrow channel, a metal needle releases high voltage for ionizing gas in the clean airflow to form ionized gas; a negative pressure generated when the ionized gas passes through an ejector sucks sampling gas, namely to-be-measured gas, into the ejector; after the sampling gas and the ionized gas are fully mixed in the ejector, microparticles in the sampling gas are combined with free charge in the ionized gas and charged to form mixed gas; the mixed gas passes through an applied electric field, and residual ions in the mixed gas are captured by the applied electric field, so that only charge carried by the charged microparticles is left in gas flow formed by the mixed gas; when gas formed by the mixed gas flows out of the sensor, a current meter is used for measuring current to obtain the microparticle concentration of the sampling gas. The advantage of accurately measuring atmospheric particulates is achieved.
Description
Technical field
The present invention relates to fields of measurement, particularly, relate to a kind of method adopting ionization method to measure air nano-scale particle concentration.
Background technology
At present, in Atmospheric particulates are measured.Rational judgment is wanted whether to have particle contamination, after particle can being separated from the air of certain volume, measure its weight again, just can calculate its aerial concentration. mainly contain 3 kinds of methods at present: gravimetric method, micro-oscillating balance method and β rays method. but these three kinds of methods have respective shortcoming:
Gravimetric method, although gravimetric method is accurate, cannot monitor automatically.
Trace oscillating balance method: measuring sample needs heating to cause the loss of volatility and half volatile material, causes measurement result on the low side.And the method is not suitable for southern humid area and pollutes the mensuration in too serious area.
β rays method: be then carry out gravimetry by measuring β ray through the decay after filter membrane and particle.It occupy two hypothesis: one is that sampling membrane band is homogeneous, and two is that the particle physics characteristic that collects is homogeneous.But above-mentioned two are often supposed and are false, and therefore determination data is generally considered to higher, this detection method is at relative clean and dry regional failure rate is low, higher in moist high-temperature area failure rate.
Above-mentioned three kinds of method costs of equipment are expensive, and are difficult to handle, and substantially cannot accomplish the real Real-Time Monitoring of particulate, and cannot the quantity of Measurement accuracy particle and nano level particle.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of method adopting ionization method to measure air nano-scale particle concentration, to realize the advantage of Measurement accuracy Atmospheric particulates.
For achieving the above object, the technical solution used in the present invention is:
A kind of method adopting ionization method to measure air nano-scale particle concentration comprises:
There is provided the device of pure air to be connected with one sensor main body, provide the device of pure air clean gas flow to be outputted to the step of sensor main body;
When the passage that clean gas flow is narrow in sensor main body, the metal needle be arranged in narrow passage discharges high pressure by the gas ionization in clean gas flow, thus forms the step of ionized gas;
Ionized gas enters the thrower of sensor subsequently, and sample gas and gas to be measured are sucked the step of thrower by the negative pressure that ionized gas produces through thrower;
After sample gas fully mixes in thrower with ionized gas, the step of the particulate in sample gas and the free charge Binding protein electric forming mixed gas in ionized gas;
Mixed gas is by an extra electric field, and in mixed gas, residual ion is caught by extra electric field, thus just only remains the step of the electric charge entrained by particulate of charging in the air-flow that mixed gas is formed;
And
When the gas that mixed gas is formed flows out sensor, use amperometric measurement electric current thus draw the step of particles contained concentration in sample gas.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, adopts ionization method to measure air particles degree quality and quantity, is adsorb based on particle and take charged principle, measures the amount of charge entrained by particulate in gas to be measured, thus draw the quality and quantity of particulate.And nano level particle quantity can be detected.Compare existing fine particle detection technique, adopt ionization method to measure air particles degree quality and quantity and use non-acquired detection method.The characteristic that non-acquired detects can be guaranteed that the accuracy of measuring avoids and adopt filter membrane and filter core to cause the loss of molecule and long period to use, thus minimizing is safeguarded and cleaning.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the Method And Principle schematic diagram of the employing ionization method measurement air nano-scale particle concentration described in the embodiment of the present invention;
Fig. 2 is the process flow diagram of the employing ionization method measurement air nano-scale particle concentration described in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 2, a kind of method adopting ionization method to measure air nano-scale particle concentration comprises:
There is provided the device of pure air to be connected with one sensor main body, provide the device of pure air that clean gas flow is outputted to sensor main body;
When the passage that clean gas flow is narrow in sensor main body, the metal needle be arranged in narrow passage discharges high pressure by the gas ionization in clean gas flow, thus forms ionized gas;
Ionized gas enters the thrower of sensor subsequently, and sample gas and gas to be measured are sucked thrower by the negative pressure that ionized gas produces through thrower;
After sample gas fully mixes in thrower with ionized gas, the particulate in sample gas and the free charge Binding protein electric forming mixed gas in ionized gas;
Mixed gas is by an extra electric field, and in mixed gas, residual ion is caught by extra electric field, thus the electric charge entrained by particulate of just only surplus charging in the air-flow that mixed gas is formed;
When the gas that mixed gas is formed flows out sensor, use amperometric measurement electric current thus draw the step of particles contained concentration in sample gas.
Electric current measured by galvanometer just reflects concentration (quantity/quality) particles contained in sample gas.Its principle as shown in Figure 1, in Fig. 1
.Electrometer and galvanometer.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. adopt ionization method to measure a method for air nano-scale particle concentration, it is characterized in that, comprising:
Nano-scale particle thing sensor is called for short sensor, provides the device of pure air to be connected sensor main body, provide the device of pure air clean gas flow to be outputted to the step of sensor main body with one;
When the passage that clean gas flow is narrow in sensor main body, the metal needle be arranged in narrow passage discharges high pressure by the gas ionization in clean gas flow, thus forms the step of ionized gas;
Ionized gas enters the thrower of sensor subsequently, and sample gas and gas to be measured are sucked the step of thrower by the negative pressure that ionized gas produces through thrower;
After sample gas fully mixes in thrower with ionized gas, the step of the particulate in sample gas and the free charge Binding protein electric forming mixed gas in ionized gas;
Mixed gas is by an extra electric field, and in mixed gas, residual ion is caught by extra electric field, thus just only remains the step of the electric charge entrained by particulate of charging in the air-flow that mixed gas is formed;
And
When the gas that mixed gas is formed flows out sensor, use amperometric measurement electric current thus draw the step of particles contained concentration in sample gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510203727.4A CN104792676B (en) | 2015-04-27 | 2015-04-27 | The method that air nano-scale particle concentration is measured using ionization method |
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| CN201510203727.4A CN104792676B (en) | 2015-04-27 | 2015-04-27 | The method that air nano-scale particle concentration is measured using ionization method |
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| CN104792676A true CN104792676A (en) | 2015-07-22 |
| CN104792676B CN104792676B (en) | 2018-07-03 |
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Cited By (4)
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| CN108431578A (en) * | 2015-12-22 | 2018-08-21 | 特斯托欧洲股份两合公司 | Particle measurer in gas flow paths |
| CN108426810A (en) * | 2018-03-16 | 2018-08-21 | 天津大学 | A kind of measuring device of particulate in air mean concentration |
| CN109991137A (en) * | 2019-04-02 | 2019-07-09 | 霸州市地海云天环保科技有限公司 | Small ion collection type monitoring device of powder-like waste based on αsource |
| CN111402540A (en) * | 2020-02-25 | 2020-07-10 | 王勇强 | Air-breathing smoke-sensing fire detection device, method and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108431578A (en) * | 2015-12-22 | 2018-08-21 | 特斯托欧洲股份两合公司 | Particle measurer in gas flow paths |
| CN108426810A (en) * | 2018-03-16 | 2018-08-21 | 天津大学 | A kind of measuring device of particulate in air mean concentration |
| CN109991137A (en) * | 2019-04-02 | 2019-07-09 | 霸州市地海云天环保科技有限公司 | Small ion collection type monitoring device of powder-like waste based on αsource |
| CN111402540A (en) * | 2020-02-25 | 2020-07-10 | 王勇强 | Air-breathing smoke-sensing fire detection device, method and equipment |
| CN111402540B (en) * | 2020-02-25 | 2021-08-24 | 王勇强 | Air-breathing smoke-sensing fire detection device, method and equipment |
| US11961378B2 (en) | 2020-02-25 | 2024-04-16 | Yongqiang Wang | Aspirating smoke sensing device, method, and apparatus for fire detection |
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| CN104792676B (en) | 2018-07-03 |
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