KR20120041920A - System for sampling and measuring particulated matters - Google Patents

Abstract

PURPOSE: A system for collecting and measuring fine dust and ultra-fine dust is provided to reduce concentration measuring errors for the fine dust by reflecting properties of the fine dust in a corresponding area because the value of the concentration of the fine dust is corrected by using a sample collected in the same place and under the same system. CONSTITUTION: A system(100) for collecting and measuring fine dust and ultra-fine dust comprises particle removing devices(102,104), a density measuring device(106), a sampling device(108), and a main control device(112). The particle removing devices draw in and filter fine dust over a certain size. The density measuring device is connected to the particle removing device in the lower part of the particle removing device. The density measuring device measures the concentration of fine dust passing through the particle removing devices in real time, thereby transmitting the measurements to the main control device. The sampling device is connected to the density measuring device in the lower part of the density measuring device collecting fine dust passed through the density measuring device. The main control device saves the values of the concentration of the fine dust measured in real time.

Description

Fine dust and ultra-fine dust collecting and measuring system {SYSTEM FOR SAMPLING AND MEASURING PARTICULATED MATTERS}

The embodiment of the present invention relates to a fine dust measurement technology, and more particularly, to the collection and measurement system of fine dust and ultra-fine dust that can simultaneously perform the collection of fine dust (including ultra-fine dust) and real-time concentration measurement It is about.

In recent years, air pollution has become a serious problem due to increased energy consumption using fossil fuel-fired thermal power generation, increased incineration throughput such as industrial waste or general household waste, and soot gas from automobiles. .

Emission gases emitted by incineration of fossil fuels, industrial wastes and household wastes contain various kinds of harmful substances harmful to the human body and are emitted to the atmosphere. The harmful substances include halogen gas such as hydrogen chloride, combustion gas such as nitrogen oxide, sulfurous acid gas, oxygen monoxide, hydrogen fluoride and ammonia.

These harmful substances have been proved through various investigations and experiments that, when absorbed by the human body, accumulate and cause various diseases as well as adverse effects on the natural environment.

Therefore, the necessity of the management of the fine dust containing such harmful substances is emerging, and as a way to protect the emissions of hazardous substances by law in the case of incinerators and fossil fuels worldwide.

In Korea, the Ministry of Environment also limits the amount of hazardous substances contained in emissions, and for this purpose, the Ministry of Environment announces the 'Air Pollution Process Test Method' and 'Emission Acceptance Standard Test Method'. The substance is controlled and supervised so that it does not contain more than a certain amount.

At this time, in order to measure the emission of harmful substances, particulate matter (Particulated matters (PM 10)) and ultra-fine dust (Fine Pariculated Matters, PM 2.5) contained in the air are collected and the concentration is measured. A fine dust measuring device is being researched and developed for this purpose.

Conventional fine dust measurement method is as follows.

1) The collection filter (the filter before collecting the fine dust) is subjected to constant temperature and humidity for 24 to 48 hours, and then the collection filter is weighed. 2) Collect the fine dust for 24 hours at one place using the collection filter. 3) The sampled filter is subjected to constant temperature and humidity for 24 to 48 hours, and then the sampled filter is weighed. 4) Measure the concentration of fine dust at the location by the difference between the weight of the filter before collection and the weight of the filter after collection.

In this case, although the 24 hour average value of the fine dust concentration can be measured, it takes too long to measure the fine dust concentration, there is a problem that the real-time concentration value of the fine dust is not known. That is, since the measured value of the fine dust concentration obtained by the conventional method is a few days before the present, it becomes impossible to measure the present fine dust concentration in the place in real time.

In addition, the conventional method for measuring fine dust damages the sample during the measurement of the concentration of the fine dust, so that it cannot be collected and used, and because the concentration of the fine dust is measured at a different place from the fine dust collecting device, There is a limit in correcting the error value of the dust concentration.

That is, in the past, the error value was corrected using a standard particle or a light scattering filter corresponding thereto, but in this case, the fine dust properties (for example, material composition, shape, color, etc.) of the place where the fine dust concentration was measured were measured. Since it does not reflect, there is a limit to correct the error value.

An embodiment of the present invention is to provide a system for collecting and measuring fine dust and ultra-fine dust that can perform the collection and concentration measurement of the fine dust in the same place in real time.

Embodiment of the present invention is to provide a system for collecting and measuring the fine dust and ultra-fine dust that can reduce the error value of the fine dust concentration by reflecting the fine dust properties of the measurement site.

Other technical problems by the embodiments of the present invention can be understood by the following description, which can be realized by the means and combinations thereof shown in the claims.

According to one embodiment of the present invention, a system for collecting and measuring fine dust and ultra-fine dust includes: at least one separation device for filtering out fine dust by a predetermined size by sucking external fine dust; A concentration measuring device which is formed at a lower portion of the separating device in connection with the separating device and measures and transmits the concentration of the fine dust passing through the separating device in real time; A collecting device which is formed under the concentration measuring device in connection with the concentration measuring device and collects the fine dust passing through the concentration measuring device; And storing the concentration value of the fine dust measured in real time, comparing the concentration value of the fine dust measured in real time with the concentration value of the fine dust collected through the sampling device, and measuring the concentration of the fine dust in real time. It includes a main control device to correct the value.

According to an embodiment of the present invention, fine dust collection and fine dust concentration measurement are made in one system. In this case, the collected sample is not damaged and the concentration of the fine dust can be measured in real time.

In addition, since the concentration value of the fine dust is corrected by using the samples collected in the same system and the place, the fine dust property at the corresponding place can be reflected, thereby reducing the error of the fine dust concentration significantly.

1 is a view schematically showing a system for collecting and measuring fine dust and ultrafine dust according to an embodiment of the present invention.
2 is a view showing the configuration of a concentration measuring apparatus according to an embodiment of the present invention.

Hereinafter, a specific embodiment of a system for collecting and measuring fine dust and ultra fine dust will be described with reference to FIGS. 1 and 2. However, this is only an exemplary embodiment and the present invention is not limited thereto.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical spirit of the present invention is determined by the claims, and the following embodiments are merely means for effectively explaining the technical spirit of the present invention to those skilled in the art to which the present invention pertains.

1 is a view schematically showing a system for collecting and measuring fine dust and ultrafine dust according to an embodiment of the present invention.

Referring to FIG. 1, the collection and measurement system 100 of fine dust and ultrafine dust includes a first separation device 102, a second separation device 104, a concentration measurement device 106, a collection device 108, Flow control device 110, and main control device 112. On the other hand, the collection and measurement system 100 of the fine dust and ultra-fine dust may further include a rainwater inflow prevention device 114 for preventing the rainwater flows into the first separation device (102). Here, a tube 116 through which fine dust moves is formed in the first separation device 102 to the flow rate control device 110.

The first separation device 102 sucks dust from the outside to filter dust, for example, PM 10 (Particle Matters 10 μm) or more. In other words, the first separation device 102 filters out dust having a diameter of 10 μm or more. Therefore, dust having a diameter of less than 10 μm is lowered to the lower part of the first separation device 102.

Here, a heating unit (not shown) may be formed in the tube 116 formed under the first separation device 102. For example, the heating unit (not shown) may be formed by wrapping an outer portion of the tube 116 formed under the first separation device 102 with a heating coil. In this case, when the humidity in the tube 116 exceeds a predetermined humidity, the heating unit (not shown) can be operated to lower the humidity in the tube 116. Here, although the heating unit (not shown) has been described as being formed under the first separation device 102, the position at which the heating unit (not shown) is formed is not limited thereto.

The second separation device 104 is formed in connection with the first separation device 102 at the lower part of the first separation device 102, and filters dust of, for example, PM 2.5 (Particle Matters 2.5 μm) or more. . In other words, the second separation device 104 filters out dust having a diameter of 2.5 μm or more. Therefore, dust having a diameter of less than 2.5 μm is lowered to the bottom of the second separation device 104.

Here, the first separation device 102 and the second separation device 104 may be selectively used. For example, both the first separating device 102 and the second separating device 104 may be used, or only one of the first separating device 102 and the second separating device 104 may be used. have.

The concentration measuring device 106 is formed in connection with the second separating device 104 at the lower portion of the second separating device 104. The concentration measuring device 106 measures the concentration of the fine dust passing through the second separation device 104 in real time, and then transmits the measured fine dust concentration data to the main control device 112. In this case, fine dust collection and concentration measurement can be performed simultaneously and in real time.

As the concentration measuring device 106, for example, an optical measuring device can be used. The optical measuring device measures the intensity of the fine dust by generating light and then measuring the intensity of light scattered by the fine dust passing through the tube 116 in the concentration measuring device 106. A detailed description thereof will be described later.

Since the optical measuring device measures the intensity of light scattered by the fine dust using light, the optical measuring device does not damage or affect the sample (ie, fine dust) to be collected. However, since the optical measuring device measures the intensity of light scattered by the fine dust, the scattering degree and the reflection angle of the light may be different according to the composition, the nature, and the shape of the fine dust existing at the measurement location, thereby causing an error. .

For example, when a large amount of elements having low scattering properties, such as carbon, are contained in the fine dust at the measurement site, an error occurs in measuring the concentration of the fine dust. That is, when a lot of elements having low scattering properties, such as carbon, are contained in the fine dust, since the elements absorb light, the amount of light scattered by the fine dust is reduced, thereby causing an error in the fine dust concentration data.

In an embodiment of the present invention, the error of the fine dust concentration data is corrected, and the error of the fine dust concentration data is corrected using the sample collected by the sampling device 108. In this case, it is possible to perform correction through a sample taken in the same place and environment where the concentration of fine dust is measured. That is, the fine dust collecting and measuring system 100 performs the fine dust collecting and the concentration measurement of the fine dust together. In this case, accurate data can be calculated by precisely correcting an error of the fine dust concentration data. A detailed description thereof will be described later.

The sampling device 108 is formed in connection with the concentration measuring device 106 at the bottom of the concentration measuring device 106. The collecting device 108 collects fine dust passing through the tube 116 in the concentration measuring device 106.

Specifically, the sampling device 108 is passed through the tube 116 in the collection filter holder 108-1 and the collection filter holder 108-1 formed in the lower portion of the concentration measuring device 106. And a collecting filter 108-2 for collecting fine dust. The collection device 108 transfers the collection filter 108-2 from the first magazine (not shown) to the collection filter holder 108-1, and then the second collection unit 108-2 is disposed in the collection filter holder 108-1. It may further include a separate device for transferring to the magazine (not shown). Here, the first magazine (not shown) is a device for storing the collecting filter before collecting the fine dust, the second magazine (not shown) is a device for storing the collecting filter after collecting the fine dust. A detailed description of the sampling device 108 other than this will be omitted since it is outside the scope of the present invention.

The flow control device 110 serves to maintain a constant air flow rate in the tube 116. Specifically, in order to accurately measure the concentration of fine dust and to collect uniform fine dust, the separation performance of the first and second separation devices 102 and 104 should be kept constant. In this case, in order to maintain a constant separation performance of the first separation device 102 and the second separation device 104, the air flow rate in the tube 116 must be kept constant.

That is, the air flow rate in the tube 116 must be kept constant so that the size of the fine dust separated in the first and second separation devices 102 and 104 can be kept constant. Accordingly, the flow rate control device 110 may refer to the temperature, humidity, pressure, and the like inside and outside the fine dust collecting and measuring system 100 to set the air flow rate in the tube 116 at, for example, 16.7 L / Min. Keep it.

The flow control device 110 sucks outside air through a vacuum pump (not shown) installed in the flow control device 110, wherein the sucked air passes through the tube 116 to the first separation device. 102 through the collecting device 108. At this time, the flow rate control device 110 supplies the air passing through the sampling device 108 (that is, air in which fine dust is collected and cleaned through the sampling filter) to the concentration measuring device 106. The air supplied to the concentration measuring device 106 is used to clean the lens in the concentration measuring device 106, for example. A detailed description thereof will be described later.

The air supplied to the concentration measuring device 106 moves through the air supply pipe 118 formed by connecting the flow rate control device 110 and the concentration measuring device 106. Dehumidifier 119 and the protective filter 120 may be formed in the air supply pipe 118, the dehumidifier 119 is moved to the concentration measuring device 106 through the air supply pipe 118 It lowers the humidity in the air.

If the humidity in the air moving through the air supply pipe 118 is not lowered, the water molecules in the air supplied to the concentration measuring device 106 affect the optical measurement and thus the measured value of the concentration measuring device 106. An error occurs at. Therefore, the humidity in the air moving to the concentration measuring device 106 through the air supply pipe 118 through the dehumidifying device 119 is lowered. As a dehumidification method through the dehumidifying apparatus 119, for example, various methods such as a heating coil or a dehumidifying agent may be used.

The protective filter 120 filters the fine dust contained in the air moving to the concentration measuring device 106 through the air supply pipe 118.

For example, when the collecting filter 108-2 is not installed in the collecting device 108, the air passing through the collecting device 108 contains fine dust, thereby causing the flow rate control device ( Fine dust is also included in the air supplied from the 110 to the concentration measuring device 106. Therefore, the fine dust contained in the air supplied to the concentration measuring device 106 through the protective filter 120 is filtered so that clean air is supplied to the concentration measuring device 106.

The main control device 112 stores the concentration value of the fine dust measured by the concentration measuring device 106 in real time in a memory (not shown). Since the concentration measuring device 106 may measure the concentration of the fine dust in real time, the concentration value of the fine dust may be stored in the memory (for example, in seconds) in the memory (not shown).

The main control device 112 corrects the error of the fine dust concentration measured by the concentration measuring device 106. As described above, an error occurs in the concentration value of the fine dust measured by the concentration measuring device 106. Thus, the main control device 112 corrects the error of the fine dust concentration. At this time, the main control device 112 corrects the error of the fine dust concentration by using the sample collected by the sampling device 108.

For example, the main control device 112 calculates a daily average value (hereinafter, 'real-time daily concentration') of the fine dust concentration measured by the concentration measuring device 106. In addition, the main control unit 112 calculates a daily average value (hereinafter, 'weight daily concentration') of the fine dust concentration collected by the sampling device 108. Here, the weight difference between the weight of the collecting filter 108-2 before collecting the fine dust and the collecting filter 108-2 after collecting the fine dust becomes the weight daily concentration.

The main control unit 112 compares the real-time daily concentration with the weight daily concentration to determine a correction factor. Thereafter, the real-time fine dust concentration value measured by the concentration measuring device 106 is multiplied by the correction coefficient to correct the error of the fine dust concentration. In this case, the main control unit 112 may correct the fine dust concentration value by reflecting an error due to humidity, temperature, pressure, etc. in the fine dust collection and measurement system, in addition to the correction coefficient. In this case, since the error is corrected using the samples collected at the same place in the same system, the fine dust property of the measuring place can be reflected, and the error can be significantly reduced.

For example, suppose that the main control device 112 receives a weight daily concentration of 2010.10.1 on 2010.10.3 (as described above, it takes about 2 days to obtain the weight daily concentration). do). At this time, the main control unit 112 stores the real-time daily concentration from 2010.10.1 to 10.3 days.

Here, the main control device 112 determines the first correction coefficient by comparing the real-time daily concentration and the weight daily concentration of 2010.10.1. In this case, the first correction factor is a difference between the real-time daily concentration and the weight daily concentration. When the primary correction coefficient is determined, the main control unit 112 corrects and stores the error of the fine dust concentration by multiplying the primary correction coefficient by the real-time daily concentration from 2010.10.1 to 10.3 days. Then, the real-time daily concentration from 2010.10.1 to 10.3 days is corrected and stored.

When the weight daily concentration of 2010.10.2 is input on day 2010.10.4, the main control unit 112 determines the secondary correction coefficient by comparing the weighted daily concentration of 2010.10.2 with the corrected real-time daily concentration. . When the second correction factor is determined, the main control unit 112 may determine the real-time daily concentration from 2010.10.1 to 10.4 days (here, the real-time daily concentration corrected through the first correction factor from 2010.10.1 to 10.3 days). M) by multiplying the second correction factor to correct and store the error of the fine dust concentration. Then, real-time daily concentration from 2010.10.1 to 10.4 days is corrected and stored again.

When the error of the fine dust concentration is corrected by repeating the above process, the error between the weight daily concentration and the real-time daily concentration becomes very small at some point. In this case, since the concentration value of the fine dust measured in real time through the concentration measuring device 106 has a considerable reliability, the fine at the place without performing a separate sampling through the sampling device 108 The concentration of dust can be checked.

In addition, the main control device 112 controls the flow control device 110 to maintain a constant air flow rate in the tube 116. In this case, the main control device 112 may control the flow control device 110 to maintain a constant air flow rate in the tube 116 in consideration of the temperature, pressure, and humidity in the tube 116. have.

According to an embodiment of the present invention, fine dust collection and fine dust concentration measurement are made in one system. In this case, the collected sample is not damaged and the concentration of the fine dust can be measured in real time. In addition, since the concentration value of the fine dust is corrected by using the samples collected in the same system and the place, the fine dust property at the corresponding place can be reflected, thereby reducing the error of the fine dust concentration significantly.

2 is a view showing the configuration of a concentration measuring apparatus according to an embodiment of the present invention. Here, the optical measuring device is shown as an example of the concentration measuring device.

1 and 2, the concentration measuring apparatus 106 includes a light emitting element 202, a first condenser lens 204, an optical chamber 206, a light stopper 208, a second condenser lens 210, And a light receiving element 212. Here, the respective components are installed in the optical chamber 206.

The light emitting device 202 is a device that generates light by converting electrical energy into light energy. For example, a light emitting diode (LED) may be used as the light emitting element 202.

The first condenser lens 204 collects the light generated by the light emitting element 202 and proceeds through the optical chamber 206.

The optical chamber 206 is a passage through which the light generated by the light emitting element 202 moves. The optical chamber 206 is formed through the tube 116. In this case, an upper end of the tube 116 is connected to the second separation device 104, and a lower end of the tube 116 is connected to the sampling device 108.

The light stopper 208 is installed on the opposite side of the light emitting element 202 in the optical chamber 206. In this case, the light stopper 208 is attached to the front surface of the second condensing lens 210 is installed in the central portion of the optical chamber 206. Since the light stopper 208 absorbs light, the light in contact with the light stopper 208 no longer travels through the optical chamber 206.

The second condensing lens 210 is installed at the rear of the light stopper 208 and serves to condense the light exiting the light stopper 208 of the light traveling through the optical chamber 206. The light receiving element 212 receives the light condensed by the second condensing lens 210.

Here, when there is no fine dust at the intersection of the tube 116 and the optical chamber 206, the light generated in the light emitting element 202 proceeds through the optical chamber 206 and the light stopper 208 ) Are all absorbed. Therefore, in this case, there is no light stored in the light receiving element 212.

On the other hand, when there is fine dust at the intersection of the tube 116 and the optical chamber 206, since the light generated from the light emitting element 202 is scattered by the fine dust, the light stopper 208 Outside of the light stopper 208 is generated to proceed to the light. At this time, the light traveling to the rear of the light stopper 208 is collected by the second condensing lens 210 is to be stored in the light receiving element (212).

The concentration measuring device 106 may measure the concentration of fine dust by measuring the intensity of light stored in the light receiving element 212, and the fine dust concentration value measured in real time may be measured by the main control device 112. To send. According to this measuring method, the concentration value of the fine dust can be measured in real time without damaging the sample (fine dust).

The optical chamber 206 is connected to the air supply pipe 118. Here, clean air is supplied from the flow rate control device 110 into the optical chamber 206 through the air supply pipe 118. In this case, the air supplied from the flow rate control device 110 is dehumidified through the dehumidifying device 119 and fine dust is removed through the protective filter 120 to be supplied into the optical chamber 206.

The clean air prevents fine dust from entering the optical chamber 206. If the fine dust is introduced into the optical chamber 206, an error may occur in the measurement of the fine dust concentration and the first condensing lens 204 may be contaminated. Thus, the clean air is continuously supplied to the fine dust. Does not enter the optical chamber 206. The clean air plays a role in cleaning the first condenser lens 204. In this case, it is possible to improve the reliability of the fine dust concentration measurement through the clean air.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. I will understand.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

102: first separation device 104: second separation device
106: concentration measuring device 108: collecting device
108-1: Harvesting Filter Holder 108-2: Harvesting Filter
110: flow control device 112: main control device
114: rainwater ingress prevention device 116: tube
118: air supply pipe 119: dehumidifier
120: protection filter
202 Light emitting element 204 First condensing lens
206: optical chamber 208: light stopper
210: second condensing lens 212: light receiving element

Claims (12)

At least one granulation device that filters outside dust by a predetermined size by sucking outside dust;
A concentration measuring device which is formed at a lower portion of the separating device in connection with the separating device and measures and transmits the concentration of the fine dust passing through the separating device in real time;
A collecting device which is formed under the concentration measuring device in connection with the concentration measuring device and collects the fine dust passing through the concentration measuring device; And
The concentration value of the fine dust measured in real time, the concentration value of the fine dust measured in real time and the concentration value of the fine dust collected by the sampling device by comparing the concentration value of the fine dust measured in real time Including the main control unit to calibrate, fine dust and ultra-fine dust collection and measurement system.
The method of claim 1,
The concentration measuring device,
A system for collecting and measuring fine dust and ultra fine dust, which measures the concentration of the fine dust in real time by an optical measuring method.
The method of claim 2,
The concentration measuring device,
Light emitting device for generating light;
A first condenser lens for condensing light generated by the light emitting element;
An optical chamber formed in connection with the separating device and configured to receive light generated by the light emitting device;
A light stopper installed at a rear of a portion of the optical chamber in which the optical chamber is connected to the separation device, and configured to absorb and block light traveling through the optical chamber;
A second condensing lens installed in the optical chamber behind the light stopper and condensing light scattered by the fine dust and not blocked by the light stopper; And
And a light receiving element for receiving the light collected by the second condensing lens.
The method of claim 3,
The concentration measuring device,
And collecting and measuring the fine dust and the ultra fine dust by measuring the intensity of light received by the light receiving element, calculating the concentration of the fine dust in real time, and transmitting the calculated value to the main control device.
The method of claim 2,
The fine dust and ultra-fine dust collecting and measuring system,
And a flow rate control device which is formed at a lower portion of the collecting device and connected to the collecting device and supplies air passing through the collecting device to the concentration measuring device.
The method of claim 5,
The fine dust and ultra-fine dust collecting and measuring system,
An air supply pipe connecting the flow control device and the concentration measurement device; And
And a dehumidifying device for dehumidifying air supplied from the flow rate control device to the concentration measuring device via the air supply pipe.
The method of claim 6,
The fine dust and ultra-fine dust collecting and measuring system,
And a protective filter for filtering the fine dust contained in the air supplied from the flow rate control device to the concentration measuring device through the air supply pipe.
The method of claim 1,
The main control device,
The difference between the daily average value of the fine dust concentration measured by the concentration measuring device and the daily average value of the fine dust concentration collected by the sampling device is determined as a correction factor, and then the real time fine dust concentration value measured by the concentration measuring device. And collect and measure fine dust and ultra fine dust by multiplying the correction coefficients to correct fine dust concentration.
The method of claim 8,
The main control device,
And collecting and measuring the fine dust and ultra fine dust by reflecting an error due to any one or more of humidity, temperature, and pressure in the fine dust collecting and measuring system in addition to the correction coefficient.
The method of claim 1,
The fine dust and ultra-fine dust collecting and measuring system,
A first granulation device that sucks external fine dust to filter out fine dust equal to or greater than a first reference size; And
A fine dust and ultra-fine dust formed in a lower portion of the first separating device, the second separating device being connected to the first separating device and filtering fine dust having a second reference size smaller than the first reference size; Collection and measurement system.
The method of claim 10,
And the first reference size is 10 μm and the second reference size is 2.5 μm.
The method of claim 10,
The fine dust and ultra-fine dust collecting and measuring system,
Further comprising a heating unit formed in the lower portion of the first separation device or the second separation device, fine dust and ultra-fine dust collection and measurement system.

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