KR102583791B1 - An apparatus for measuring fine particulate matter within a stack - Google Patents

Abstract

An apparatus 100 for measuring fine dust in a chimney is disclosed. The chimney fine dust measuring device 100 includes a first sample measuring unit 30 for measuring a fine dust standard value; A sample collection unit (10) configured to collect fine dust samples from exhaust gas in the chimney; And it may include a second sample measurement unit 70 configured to obtain a measurement value of fine dust in the chimney based on the fine dust sample collected by the sample collection unit 10.

Description

Fine dust measurement device in chimney {AN APPARATUS FOR MEASURING FINE PARTICULATE MATTER WITHIN A STACK}

The present invention relates to a device for measuring fine dust in a chimney. More specifically, the present invention relates to a device for measuring fine dust in a chimney. More specifically, in measuring the amount of fine dust in chimney exhaust gas containing a large amount of moisture, the mass concentration of moisture is excluded to reduce fine dust measurement error. This is an invention regarding a fine dust measurement device in a chimney that minimizes and at the same time allows collecting and measuring fine dust only by moving the Betaray roll forward, thus preventing the problem of roll cutting due to Betaray roll back.

In general, various types of exhaust gases harmful to the human body are emitted from thermal power plants that burn fossil fuels to generate electricity, and incinerators that incinerate industrial waste or general household waste. These harmful substances may include particulate matter, halogen gases, nitrogen oxides, sulfur dioxide, carbon monoxide, hydrogen chloride, ammonia, and other combustion gases. It has been proven through various investigations and experiments that such harmful substances not only cause various diseases when they accumulate after being absorbed into the human body, but also have a negative impact on the natural environment.

For this reason, in the case of incinerators and businesses using fossil fuels around the world, the emissions of hazardous substances are regulated by strong laws, and in Korea, the amount of hazardous substances included in exhaust gases is also limited through a notice from the Ministry of Environment.

Among various fine dust measurement methods, the beta-ray measurement method, which measures the concentration of particulate matter by utilizing the attenuation principle of beta rays (or beta rays), has the advantage of enabling real-time measurement and at the same time having a relatively small measurement error. A typical beta-ray fine dust measuring device that measures fine dust using the attenuation principle of beta-ray is shown in Figure 1.

When particulate matter is introduced through the sample inlet (1), a fine dust sample is collected from a certain area of the filter filter (2), and beta rays from the beta ray source placed in the beta ray source housing (3) are transmitted to the fine dust sample. Passes through the collected filter filter (2) and is detected by the beta-ray detector (4), and the beta-ray detector (4) measures the amount of fine dust according to the attenuation principle based on the amount of detected beta-ray. The sample that has passed through the filter filter (2) may be discharged to the outside through the sample outlet (5).

For reference, the typical Beta Ray fine dust measurement device as shown in FIG. 1 is a device for measuring fine dust in an ambient atmosphere, and sample collection and measurement are performed in the same area. This general atmospheric Betaray fine dust measuring device cannot be used to measure fine dust in the exhaust gas inside the chimney because (i) there is a huge amount of moisture in the exhaust gas in the chimney, and this moisture is not used in measuring fine dust; (ii) In the case of the beta-ray detector, the upper operating temperature limit is approximately 40 degrees, which conflicts with the specified temperature conditions (approximately 120 degrees) for measuring fine dust in exhaust gas.

In order to solve this problem, attempts were made to collect samples and perform measurements in spaces with different conditions (e.g., temperature, etc.), but the process of rolling back the beta ray roll to obtain the zero point was made. Due to the large amount of moisture present in the sampling space, problems arise with cutting of betalay rolls, which are generally made of glass fiber materials. When continuously and automatically measuring fine dust in a chimney, cutting the betaray roll is a fatal defect that significantly reduces the continuity, stability, and accuracy of measurement.

Accordingly, the need for a new type-based chimney fine dust measurement device that allows continuous and automatic measurement of fine dust in the chimney without cutting the beta ray roll is gradually increasing in the art.

The present invention was created to solve the above problems, and the present invention is a fine dust in the chimney basis that can improve reliability by minimizing errors in fine dust measurement by excluding condensation of moisture in the exhaust gas in the chimney. The purpose is to provide a measuring device.

In addition, the present invention can obtain the zero point for fine dust measurement without rewinding the Betaray roll, thereby effectively solving the problem of the Betaray roll being cut due to moisture and enabling continuous fine dust measurement. The purpose is to provide a device for measuring fine dust in a chimney.

In addition, the present invention measures the amount of fine dust in the chimney by additionally considering the correction factors of the first sample measuring unit for measuring the fine dust standard value and the second sample measuring unit for obtaining the fine dust measurement value, The purpose is to provide a fine dust measurement device in a chimney that can accurately and precisely measure fine dust.

In addition, the present invention enables continuous collection and measurement of different sampling groups, thereby preventing waste of beta-ray filters and improving data reliability for fine dust measurement by securing multiple data. The purpose is to provide an internal fine dust measurement device.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

An apparatus for measuring fine dust in a chimney according to an embodiment of the present invention to solve the above technical problem includes a first sample measuring unit for measuring a fine dust reference value; A sample collection unit configured to collect fine dust samples from exhaust gas in the chimney; And it may include a second sample measurement unit configured to obtain a measurement value of fine dust in the chimney based on the fine dust sample collected from the sample collection unit.

In addition, the fine dust measuring device in the chimney measures the fine dust in the chimney based on the fine dust reference value measured by the first sample measuring unit and the fine dust measurement value obtained by the second sample measuring unit. It may further include a control unit configured to calculate the amount.

In addition, the control unit calculates the amount of fine dust in the chimney based on the difference between the fine dust reference value measured by the first sample measuring unit and the fine dust measurement value obtained by the second sample measuring unit. It may be additionally configured to do so.

In addition, the control unit may additionally consider a correction factor of at least one of the first sample measurement unit and the second sample measurement unit when calculating the amount of fine dust in the chimney.

In addition, the first sample measuring unit is configured to measure the fine dust reference value using a beta ray source and a beta ray detector, and the second sample measuring unit is configured to measure the fine dust measurement value using a beta ray source and a beta ray detector. It can be configured to obtain.

In addition, the device for measuring fine dust in a chimney includes: a first insulation unit configured to spatially separate the first sample measurement unit and the sample collection unit from each other and at the same time insulate them from each other; And it may further include a second insulation unit configured to spatially separate the sample collection unit and the second sample measurement unit from each other and at the same time insulate them from each other.

In addition, the high temperature conditions for gasifying the water vapor contained in the fine dust sample collected from the sample collection unit by the first and second insulation units and the The constant temperature conditions regarding the sample measurement temperature can be met simultaneously.

Additionally, the second insulation unit may include an insulation plate configured to block heat conduction between the sample collection unit and the second sample measurement unit, and a dryer may be provided on at least a portion of the bottom of the insulation plate.

According to the device for measuring fine dust in a chimney according to an embodiment of the present invention, reliability can be improved by minimizing errors in measuring fine dust by excluding condensation of moisture in the exhaust gas in the chimney.

In addition, according to the device for measuring fine dust in a chimney according to an embodiment of the present invention, the zero point for measuring fine dust can be obtained without rewinding the Betaray roll, thereby eliminating the problem of the Betaray roll being cut due to moisture. It can effectively resolve the problem and enable continuous fine dust measurement.

In addition, according to the fine dust measurement device in the chimney according to an embodiment of the present invention, a correction factor is added to the first sample measurement unit for measuring the fine dust reference value and the second sample measurement unit for obtaining the fine dust measurement value. By measuring the amount of fine dust in the chimney, it is possible to measure fine dust more accurately and precisely.

In addition, according to the chimney fine dust measurement device according to an embodiment of the present invention, continuous collection and measurement of different sampling groups is possible, thereby preventing waste of beta ray filters and securing multiple data. Data reliability regarding fine dust measurement can be improved.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
Figure 1 is a schematic diagram of a general Betaray fine dust measurement device.
Figures 2a, 2b, and 3 are detailed configuration diagrams of a fine dust measuring device 100 in a chimney according to an embodiment of the present invention.
Figure 4 is a schematic diagram illustrating continuous measurement and collection of different sampling groups according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described with reference to the attached drawings. When adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto and may be modified and implemented in various ways by those skilled in the art.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected," but also the case where it is "indirectly connected" with another element in between. . Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. Additionally, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

Figures 2a and 2b are detailed configuration diagrams of a fine dust measuring device 100 in a chimney according to an embodiment of the present invention. For reference, in the following specification, the Beta-ray method is described as an example among various methods of measuring fine dust for easy understanding of the present invention, but it can be applied equally or substantially the same to other methods other than the Beta-ray method. It will be obvious that there is.

The fine dust measuring device 100 in the chimney according to an embodiment of the present invention shown in FIG. 2 measures the amount of fine dust in the exhaust gas in the chimney using the attenuation principle of beta ray, and measures the space for sampling and the sample. It is characterized by separating the measurement spaces from each other and at the same time enabling zero point (or reference value) measurement for fine dust measurement without beta ray rollback.

For reference, the phenomenon in which a radioactive atomic nucleus collapses to change the atomic number of an element and emit electrons or positrons is called beta decay, where the emitted electrons are beta (-) particles and the emitted positrons are beta (+) particles. , and beta rays usually refer to beta (-) particles.

When electrons emitted by beta decay collide with other substances, the electrons emitted through scattering with the outer orbital electrons and atomic nuclei inside the colliding substance lose some of their energy, and the energy of the beta particle is small. In this case (for example, below 1ev), most of the energy loss occurs through scattering with the outer orbital electrons of the colliding material. Therefore, the absorption of beta particles has the characteristic of being proportional to the electron density of the absorbing material (i.e., the colliding material).

However, electron density is proportional to the ratio of atomic number and atomic mass, and that ratio has a constant value for most elements. Therefore, the attenuation of beta particles is affected only by electron density, regardless of the chemical composition of the absorbing material. For reference, when using the light transmission principle as a method of measuring the concentration of dust, a large measurement error may occur due to the optical properties of the material, but in the method using beta decay, such error is relatively small.

The degree of attenuation of beta particles due to beta ray absorption when they pass through a medium varies exponentially with the mass density of the material according to the Beer-Lambert relationship. Therefore, in measuring the concentration of beta rays, the degree to which beta particles are attenuated when passing through a medium can be calculated from the function of Equation 1 below, which exponentially changes with the mass density of the material.

[Equation 1]

I = I ₀ * exp(-υυ)

here,

I ₀ : Initial beta ray intensity (count rate),

I: Intensity of beta ray after passing through the medium

ϕ: mass density of absorbent material (mg/cm ² )

υ: Attenuation coefficient of beta ray (cm ² /mg) (υ is a function of the electron density of the absorbing material, but is constant for most elemental compositions)

Since _the attenuation coefficient is determined a priori through calibration, the mass density of the absorbing material (ϕ ) can be calculated.

As shown in Figure 2a, the fine dust measuring device 100 in the chimney according to an embodiment of the present invention includes a sample collection unit 10, a first insulation unit 20, and a first sample measurement unit 30. ), an open/adhesion control unit, a filter unit 50, a control unit 60, a second sample measurement unit 70, a second insulation unit 80, etc.

Here, in contrast to the fact that the general Beta Ray fine dust measurement device shown in FIG. 1 performs sample collection and measurement in the same space, and thus cannot be used for measuring fine dust in chimney exhaust gas containing a large amount of moisture, In the chimney fine dust measurement device 100 according to an embodiment of the present invention, the first sample measurement unit 30 and the sample collection unit 10 are spatially separated by the first insulation unit 20, and at the same time, the first sample measurement unit 30 and the sample collection unit 10 are spatially separated by the first insulation unit 20. The sample measurement unit 30 and the sample collection unit 10 are insulated from each other, thereby maintaining high temperature conditions in the sample collection unit 10 (e.g., 120 ± 14°C, according to the process test method, described in detail below) and the first The constant temperature condition (e.g., 40° C., described in detail below) in the sample measuring unit 30 is simultaneously satisfied, and the sample collecting unit 10 and the second sample measuring unit ( 70) are spatially separated, and at the same time, the sample collection unit 10 and the second sample measurement unit 70 are insulated from each other, so that the high temperature condition (for example, 120 ± 14°C) in the sample collection unit 10 and the second sample collection unit 10 are insulated from each other. It is characterized by simultaneously satisfying the constant temperature condition (for example, 40°C) in the sample measuring unit 70, and the unique features of the present invention will be described in more detail below.

The first sample measuring unit 30 can measure the fine dust reference value by utilizing the beta-ray source 36 and the beta-ray detector 39. For reference, the thickness of Betaray rolls is not constant, so when measuring the weight in micrograms, there is usually a difference of 300 to 500 micrograms. In order to compensate for the error due to the thickness difference of the Beta Ray roll, the zero point can be measured, and the first sample measuring unit 30 according to the present invention can measure the zero point of the Beta Ray roll.

In other words, the first sample measurement filter 57 used in the first sample measurement unit 30 according to the present invention corresponds to a filter in which no fine dust is collected, and therefore the first sample measurement unit 30 The zero point of the beta ray roll can be measured through the beta ray source 36 and the beta ray detector 39. This zero point can be used as a reference value (or initial value) for measuring fine dust in the chimney, and in this specification below, the value measured by the first sample measuring unit 30 is referred to as the 'fine dust reference value'. I decided to do it.

The beta ray source 36 mounted in one area of the beta ray source mounting unit 35 can emit a predetermined beta ray, and the emitted beta ray passes through the first sample measurement filter 57 and is a part of the beta ray. is absorbed and the remaining beta ray is detected by the beta ray detector 39 provided in the beta ray detector housing 31, so that the fine dust reference value can be measured.

For reference, in the configuration of Figure 2a, the beta ray source 36 is shown to be placed on the lower side and irradiate beta ray toward the beta ray detector 39 disposed on the upper side. However, according to an additional embodiment of the present invention, the beta ray source 36 is placed on the lower side. It is also possible to implement the first sample measuring unit 30 so that the ray source 36 is disposed on the upper side and irradiates beta rays toward the beta ray detector 39 disposed on the lower side. In particular, in the latter case, the constant temperature condition (e.g., 40°C) in the first sample measuring unit 30 can be more easily implemented by placing the beta-ray detector 39, which is very sensitive to temperature, more distant from the heat source. .

Here, the beta-ray detector 39 may be, for example, a PMT (photomultiplier tube), and the upper limit temperature at which the beta-ray detector 39 can perform a detection operation is about 40°C. Therefore, in order to completely exclude moisture components when measuring fine dust, the fine dust sample is provided with a sample collection unit 10 and a beta-ray detector 39 that must be maintained at a very high temperature (e.g., 120 ± 14°C). It is preferable that the first sample measuring units 30 are spatially separated from each other and at the same time insulated from each other. To implement this, the fine dust measuring device 100 in the chimney according to an embodiment of the present invention has a first insulating unit 20. ) is characterized in that it is additionally provided.

More specifically, as shown in Figure 2a, the first insulation portion 20 is composed of an insulation wall 21 and an insulation plate 22, and the insulation wall 21 and the insulation plate 22 may be formed as one piece. In addition, the radiant heat between the sample collection unit 10 and the first sample measurement unit 30 can be blocked by the insulation wall 21, and the sample collection unit 10 and the first sample measurement unit (30) can be blocked by the insulation plate 22. 30) It can block heat conduction between Accordingly, in the chimney fine dust measuring device 100 according to an embodiment of the present invention, the high temperature condition (e.g., 120 ± 14°C) in the sample collection unit 10 and the first sample measurement unit 30 It is possible to simultaneously satisfy the constant temperature conditions (for example, 40°C).

Regarding the constant temperature condition in the first sample measuring unit 30, in order to measure fine dust in the exhaust gas, it is desirable to keep the measurement temperature constant. This requires continuously measuring the amount of fine dust under the same measurement conditions. This is because measurement errors do not occur.

To this end, the first sample measuring unit 30 according to an embodiment of the present invention is disposed in at least a partial area of the first sample measuring unit 30 to measure the temperature of the first sample measuring unit 30. 2 It may further include a temperature sensor 38, and a cooling fan 33 for cooling the air in the first sample measuring unit 30 may be further provided in at least some areas of the first sample measuring unit 30. You can.

Accordingly, the control unit 60 operates the cooling fan 33 when the temperature of the first sample measuring unit 30 measured by the second temperature sensor 38 exceeds the preset second temperature (for example, 40°C). ) can be controlled to maintain the temperature of the first sample measuring unit 30 at the preset second temperature (for example, 40°C). Accordingly, the effective measured value can be detected when the temperature of the detector reaches the same constant temperature.

In addition, the first sample measuring unit 30 according to the present invention may be additionally equipped with a span calibration tool 32 so that a span calibration plate (span filter) can be inserted when periodically performing zero calibration and span calibration. there is.

The sample collection unit 10 may be configured to collect fine dust samples from exhaust gas within the chimney. In this regard, according to an embodiment of the present invention, only fine dust less than PM10 or less than PM2.5 can be separated by a particle size separation device at the front of the sample collection unit 10, and the heated fine dust sample is heated. It can be sucked into the sample collection unit 10 through the suction tube 12.

The fine dust sample sucked through the heating suction tube 12 is maintained in a preset first temperature range (e.g., 120 ± 14°C) by the heating conduit 13 built into the outer wall of the sample collection device 11. It may be, where the preset first temperature range (for example, 120 ± 14°C) gasifies the water vapor contained in the fine dust sample and discharges it to the outside through the sampling filter 54 and the suction air discharge pipe 15. This may correspond to the temperature range for discharge. High-temperature water vapor condenses into water at temperatures below 100°C, and the condensed water acts as an additional mass concentration when collecting samples, causing serious errors in fine dust measurement.

That is, when the conditions for heating the fine dust sample to a preset first temperature range (for example, 120 ± 14°C) are maintained, only fine dust can be collected from the sampling filter 54, and the high-temperature gasified The sample gas containing water vapor is discharged to a downstream processing device (eg, dehumidifier, gas/pressure sensor, flow meter, suction pump, etc.) through the suction air discharge pipe 15.

In this way, the fine dust measuring device 100 in the chimney according to an embodiment of the present invention uses the heating conduit 13 to measure the fine dust sample sucked through the heating suction pipe 12 to a preset first temperature range (e.g. For example, by heating to 120 ± 14°C) and discharging the water vapor in the fine dust sample gasified by the heating conduit 13 through the suction air discharge pipe 15, moisture can be completely excluded when collecting fine dust samples. As a result, the error in fine dust measurement can be minimized and reliability can be significantly improved.

In order to continuously ensure the accuracy and reliability of such fine dust measurement, according to an additional embodiment of the present invention, a first temperature sensor 16 configured to measure the temperature of the suction air discharge pipe 15 is used to measure the temperature of the suction air discharge pipe 15. ) may be placed in at least some areas of.

The temperature of the suction air discharge pipe 15 detected by the first temperature sensor 16, that is, the temperature at which the sample gas passes through the sampling filter 54, can be transmitted to the control unit 60, and the control unit 60 When the temperature in the suction air discharge pipe 15 measured by the first temperature sensor 16 is below the first preset temperature range (e.g., 120 ± 14° C.), the heating temperature of the heating pipe 13 is increased. By controlling the temperature in the suction air discharge pipe 15 to be within a preset first temperature range (e.g., 120 ± 14°C), the high temperature condition in the sample collection unit 10, that is, all moisture in the fine dust sample is gasified. It is possible to meet the temperature conditions for discharge through the suction air discharge pipe 15, and accordingly, when collecting fine dust samples, moisture, which is a factor that causes errors in future fine dust measurement, can be completely excluded.

The second sample measurement unit 70 uses the beta-ray source 76 and the beta-ray detector 79 to obtain a measurement value of fine dust in the chimney based on the fine dust sample collected by the sample collection unit 10. It can be configured to do so. The beta ray source 76 mounted in one area of the beta ray source mounting unit 75 can emit a predetermined beta ray, and the emitted beta ray is fine dust collected while passing through the second sample measurement filter 58. A portion of the beta ray is absorbed and the remaining beta ray is detected by the beta ray detector 79 provided in the beta ray detector housing 71, so that a measurement value of fine dust in the chimney can be obtained.

That is, in contrast to measuring the fine dust reference value (or zero point) in the first sample measuring unit 30 based on the first sample measuring filter 57 in which fine dust is not collected, one embodiment of the present invention The second sample measurement unit 70 according to the example may obtain a fine dust measurement value based on the second sample measurement filter 58 where the fine dust collected from the sample collection unit 10 is present, and thus the second sample measurement unit 70 The difference between the fine dust measurement value in the sample measurement unit 70 and the fine dust reference value in the first sample measurement unit 30 can be the basis for calculating the amount of fine dust in the chimney, and the amount of fine dust in the chimney is The calculation method will be described in more detail below.

For reference, in the configuration of Figure 2a, the beta ray source 76 is shown to be placed on the lower side and irradiate beta ray toward the beta ray detector 79 disposed on the upper side. However, according to an additional embodiment of the present invention, the beta ray source 76 is placed on the lower side. It is also possible to implement the second sample measuring unit 70 so that the ray source 76 is disposed on the upper side and irradiates beta rays toward the beta ray detector 79 disposed on the lower side. In particular, in the latter case, the constant temperature condition (e.g., 40°C) in the second sample measuring unit 70 can be more easily implemented by placing the beta-ray detector 79, which is very sensitive to temperature, more spaced apart from the heat source. .

Here, the beta-ray detector 79 may be, for example, a PMT, and the upper limit temperature at which the beta-ray detector 79 can perform a detection operation is about 40°C. Therefore, in order to completely exclude moisture components when measuring fine dust, the fine dust sample is provided with a sample collection unit 10 and a beta-ray detector 79 that must be maintained at a very high temperature (e.g., 120 ± 14°C). It is preferable that the second sample measuring units 70 are spatially separated from each other and at the same time insulated from each other. To implement this, the fine dust measuring device 100 in the chimney according to an embodiment of the present invention has a second insulating unit 80. ) is characterized in that it is additionally provided.

More specifically, as shown in Figure 2a, the second insulation unit 80 is composed of a second insulation wall 81 and a second insulation plate 82, and the second insulation wall 81 and the second insulation plate ( 82) may be formed integrally, and may block radiant heat between the sample collection unit 10 and the second sample measurement unit 70 by the second insulating wall 81, and can block the sample by the second insulating plate 22. Heat conduction between the sampling unit 10 and the second sample measuring unit 70 can be blocked. Accordingly, in the chimney fine dust measuring device 100 according to an embodiment of the present invention, the high temperature condition (e.g., 120 ± 14°C) in the sample collection unit 10 and the second sample measurement unit 70 It is possible to simultaneously satisfy the constant temperature conditions (for example, 40°C).

For reference, unlike the first insulation unit 20 provided between the first sample measuring unit 30 and the sample collecting unit 10, the first insulation unit 20 is provided between the sample collecting unit 10 and the second sample measuring unit 70. The insulating plate 82 of the second insulating portion 80 may be additionally provided with a dryer 82-1 (or heater) on at least a portion of the bottom thereof. Therefore, by implementing additional drying of the filter from which the sample is collected and moving to the second sample measuring unit 70, it is possible to more reliably prevent the occurrence of fine dust measurement errors due to moisture.

Regarding the constant temperature condition in the second sample measuring unit 70, it is desirable to always keep the measurement temperature constant in order to measure fine dust in the exhaust gas, which requires continuously measuring the amount of fine dust under the same measurement conditions. This is because measurement errors do not occur.

To this end, the second sample measuring unit 70 according to an embodiment of the present invention is disposed in at least a partial area of the second sample measuring unit 70 and is used to measure the temperature of the second sample measuring unit 70. 3 It may further include a temperature sensor 78, and a cooling fan 73 for cooling the air in the second sample measuring unit 70 may be further provided in at least some areas of the second sample measuring unit 70. You can.

Accordingly, the control unit 60 operates the cooling fan 73 when the temperature of the second sample measuring unit 70 measured by the third temperature sensor 78 exceeds the preset second temperature (for example, 40°C). ) can be controlled to maintain the temperature of the second sample measuring unit 70 at the preset second temperature (for example, 40°C). Accordingly, the effective measured value can be detected when the temperature of the detector reaches the same constant temperature.

In addition, the second sample measuring unit 70 according to the present invention may be additionally equipped with a span calibration tool 72 so that a span calibration plate can be inserted when periodically performing zero calibration and span calibration.

The filter unit 50 is disposed below the fine dust measuring device 100 in the chimney and can store the supply filter in the form of a roll. The filtration filter can be safely supplied by the filter carrier 51, and by placing the photo sensor 52 near the filter carrier 51, the length of the supply filter can be accurately measured to ensure that it is supplied at the same length and measured accordingly. Ensure that the section remains constant.

The measured sample can be stored by transferring it to the measurement sample storage 56 while keeping the filter stable on the carrier stand 55.

In this regard, in order to transfer the sample filter, the sampling filter 54, the first sample measurement filter 57, and the second sample measurement filter 58 need to be opened, but when sample collection and sample measurement are performed, the sample collection filter 54, the first sample measurement filter 57, and the second sample measurement filter 58 need to be opened. It is preferable that the sampling filter 54, the first sample measurement filter 57, and the second sample measurement filter 58 are sealed so that air can be completely blocked, and for this purpose, a chimney according to an additional embodiment of the present invention The fine dust measuring device 100 may further include an open/close control unit.

More specifically, the open/adhesion control unit is formed integrally and moves in the vertical direction through at least a partial area of the sample collection unit 10 and at least a partial area of the first sample measurement unit 30 and the second sample measurement unit 70. It may be comprised of a lifting member 44 coupled to enable sliding movement, and a lifting drive motor 45 coupled to at least a portion of the lifting member 44 to enable upward or downward movement of the lifting member 44. there is.

Therefore, when the lifting member 44 is lowered by the lifting driving motor 45, the lifting member 44 is connected to the sampling filter 54 in the sample collecting unit 10 and the sampling filter 54 in the first sample measuring unit 30. It may be configured to close and close the circumference of the first sample measurement filter 57 and the second sample measurement filter 58 in the second sample measurement unit 70. Additionally or alternatively to the embodiment in which the lifting member 44 is lowered by the lifting drive motor 45, according to a further embodiment of the present invention, a contact member 46 is additionally provided along the circumference of the lifting member 44. It may be provided, and the adhesion member 46 may be, for example, a spring, thereby allowing the elevating member 44 to be in close contact with it in the downward direction.

Figure 2a shows that when collecting and measuring a fine dust sample, the lifting member 44 is lowered by the lifting driving motor 45, and the sampling filter 54, the first sample measurement filter 57, and the second sample measurement filter ( 58), or the lifting member 44 is pressed in the downward direction by the elastic force of the adhesion member 46, and the sample collection filter 54, the first sample measurement filter 57, and the second sample measurement. Figure 2b shows a configuration in which the circumference of the filter 58 is closely adhered, and Figure 2b shows that the lifting member 44 is raised by the lifting driving motor 45 when the filter is transported, thereby forming the sampling filter 54 and the first sample measurement filter ( 57) and the second sample measurement filter 58 are temporarily opened, and the filter can be transported along the open space.

In addition, although not explicitly shown in FIGS. 2A and 2B, according to an additional embodiment of the present invention, a double blocking member is additionally provided in the first sample measurement unit 30 and/or the second sample measurement unit 0. By doing so, the efficiency of energy supply can be further improved.

In addition, FIGS. 2A and 2B show a lifting member 44 coupled to at least a partial area of the sample collection unit 10 and a lifting member coupled to at least a partial area of the first and second sample measuring units 30 and 70 ( 44) is formed integrally and moves up and down as a single unit by a single lifting drive motor 45. However, in another embodiment of the present invention, the lifting member 44 on the sample collection unit 10 side and Different lifting drive motors are mechanically coupled to the lifting members 44 of the first sample measuring unit 30 and the second sample measuring unit 70 so that they can be driven by different lifting driving motors. Measuring device 100 may also be implemented.

For reference, the control unit 60 measures the fine dust standard value in the first sample measuring unit 30, collects the fine dust sample in the sample collecting unit 10, and measures the fine dust in the second sample measuring unit 70. It is possible to comprehensively control the operation, function, etc. of the fine dust measurement device 100 in the chimney in relation to acquisition of measured values. According to various implementations or embodiments, the control unit 60 may be implemented with other device types such as a controller, micro-controller, processor, and micro-processor. You can.

The control unit 60 according to an embodiment of the present invention determines the fine dust within the chimney based on the fine dust reference value measured by the first sample measuring unit 30 and the fine dust measurement value obtained by the second sample measuring unit 70. The amount of dust can be calculated. More specifically, the control unit 60 determines the level of fine dust in the chimney based on the difference between the fine dust reference value measured by the first sample measuring unit 30 and the fine dust measurement value obtained by the second sample measuring unit 70. Quantity can be calculated.

That is, the first sample measurement filter 57 used to measure the fine dust reference value in the first sample measurement unit 30 corresponds to a filter in which fine dust is not collected, and the second sample measurement unit 70 ), the second sample measurement filter 58 used to obtain fine dust measurement values corresponds to a filter in which fine dust has been collected from the sample collection unit 10, and therefore, the second sample measurement filter 58 is used to obtain fine dust measurement values in the first sample measurement unit 30. The difference between the measured fine dust reference value and the fine dust measurement value obtained by the second sample measuring unit 70 may be directly related to the amount of fine dust in the chimney.

For reference, the degree to which beta particles are attenuated when they pass through a medium due to beta-ray absorption changes exponentially with the mass density of the material. This 'mass' characteristic, which can express the amount of fine dust, is used in various expression examples. Accordingly, it may be expressed in terms of thickness, concentration, etc., and in the present specification below, this will be representatively expressed as the “thickness” of Beta Ray Roll.

For example, the fine dust reference value measured in the first sample measuring unit 30, for example, the initial roll thickness is 300, and the fine dust measurement value obtained in the second sample measuring unit 70, for example, is measured If the roll thickness is 350, the control unit 60 according to the present invention can calculate the amount of fine dust by recognizing the difference, 50 (=350-300), as the mass of the collected fine dust.

In this regard, the beta-ray source 36 and beta-ray detector 39 included in the first sample measuring unit 30 and the beta-ray source 76 and beta-ray detector included in the second sample measuring unit 70. Even if (79) is provided as the same product, some errors may occur due to factors such as the measurement environment. To solve this problem, according to an additional embodiment of the present invention, the control unit 60 corrects the first sample measurement unit 30 and/or the second sample measurement unit 70 in calculating the amount of fine dust in the chimney. A calibration factor may be additionally considered.

For example, when measuring the zero point by applying a filter in which fine dust is not collected to both the first sample measuring unit 30 and the second sample measuring unit 70, theoretically, both measuring units 30, 70), the same reference value should be measured, but in reality, an error occurs, such as a roll thickness of 300 being measured in the first sample measuring unit 30 and a roll thickness of 320 being measured in the second sample measuring unit 70. .

A correction factor for correcting these errors may be set periodically (e.g., daily, weekly, monthly, etc.), for example (i) the correction factor may be implemented as a rate-based correction factor (e.g. For example, by setting the correction factor to "*15/16", correction can be made by adding *15/16 to the fine dust measurement value obtained from the second sample measuring unit 70, that is, 350*15/16 = 328.125), ( ii) The correction factor may be implemented as a correction factor based on addition and subtraction (for example, the correction factor is set to "-20" and the fine dust measurement value obtained from the second sample measuring unit 70 is corrected by -20. can, i.e. 350-20 = 330).

Figure 3 is a detailed configuration diagram of a fine dust measuring device 100 in a chimney according to an additional embodiment of the present invention. As described in relation to FIG. 2, it is important to maintain the same conditions for measurement (e.g., temperature of 40°C, etc.) in the first sample measurement unit 30 and the second sample measurement unit 70. Since the exhaust gas in the chimney is generally at a very high temperature and the sample collection unit 10 is designed to maintain a specific high temperature range (for example, 120 ± 14°C) for gasification of moisture, the first sample measurement unit 30 In the second sample measuring unit 70, it is common to use a cooling fan 33 to maintain a constant temperature (for example, 40°C).

However, in winter, the external temperature may drop to -20°C, and accordingly, the temperatures of the first sample measuring unit 30 and the second sample measuring unit 70 are below the set maintenance temperature (e.g., 40°C). It may fall to . In this case, it is virtually impossible to maintain a temperature of 40°C by the cooling fan 33, so according to an additional embodiment of the present invention, the first sample measuring unit 30 and the second sample measuring unit 70 are heated and A Peltier element (33-1, or thermoelectric element) capable of implementing both cooling may be disposed in at least some areas of the first sample measurement unit 30 and the second sample measurement unit 70, and such Peltier element An example of the arrangement of the element 33-1 is illustratively shown in FIG. 3 .

Therefore, according to an additional embodiment of the present invention, constant temperature conditions are achieved by implementing both heating and cooling of the space within the first sample measuring unit 30 and the second sample measuring unit 70 using the Peltier element 33-1. As a result, there is no need to provide separate heating and cooling devices, thereby significantly increasing space efficiency and cost efficiency.

Figure 4 is a schematic diagram illustrating continuous measurement and collection of different sampling groups according to an embodiment of the present invention.

As shown in (a) of FIG. 4, the first sample measurement unit 30 measures the fine dust standard value using the first sample measurement filter 57, and the sample collection unit 10 uses the sample collection filter. A fine dust sample is collected using 54, and the second sample measuring unit 70 can obtain a fine dust measurement value using the second sample measuring filter 58. For this purpose, the fine dust reference value is measured using the first sample measurement filter 57 at time t1, and the control unit 60 measures the measurement spot of the first sample measurement unit 30 and the sample collection unit ( The filter is moved forward by the distance between the measurement spots in 10) so that the sample collection unit 10 collects a fine dust sample using the sampling filter 54 at time t2, and the control unit 60 controls the sample collection unit. The filter is moved forward by the distance between the measurement spot of (10) and the measurement spot of the second sample measurement unit 70, so that the second sample measurement unit 70 utilizes the second sample measurement filter 58 at the time t3. This allows you to obtain fine dust measurement values.

However, as shown in (a) of Figure 4, when the filter is moved forward in units of measurement spots to measure fine dust reference values, collect fine dust samples, and acquire fine dust measurement values for one sampling group, The filter area between the measurement spots is unused and has no choice but to be discarded.

In order to complement this, according to an additional embodiment of the present invention, a fine dust measurement device 100 in the chimney is used to continuously perform fine dust reference value measurement, fine dust sample collection, and fine dust measurement value acquisition for a plurality of sampling groups. can be implemented. For example, (i) the fine dust reference value of the first sample group is measured at time t1, and (ii) the control unit 60 moves the filter forward by 1/3 of the measurement spot interval to measure the fine dust standard value at time t2. Measures the fine dust reference value of the second sample group, (iii) the control unit 60 moves the filter forward by 1/3 of the measurement spot interval and measures the fine dust reference value of the third sample group at time t3, (iv) The control unit 60 moves the filter forward by 1/3 of the measurement spot interval to measure the fine dust reference value of the fourth sample group at time t4 and simultaneously collect the fine dust sample of the first sample group. (v) The control unit 60 moves the filter forward by 1/3 of the measurement spot interval to measure the fine dust reference value of the fifth sample group at the time t5 and simultaneously measures the fine dust sample of the second sample group. can be collected, and (vi) the control unit 60 moves the filter forward by 1/3 of the measurement spot interval to measure the fine dust reference value of the 6th sample group at the time t6 and at the same time measures the fine dust reference value of the 3rd sample group. A fine dust sample can be collected, and (vii) the control unit 60 moves the filter forward by 1/3 of the measurement spot interval to measure the fine dust reference value of the 7th sample group at time t7 and at the same time the 4th sample group. The fine dust measurement value of the first sample group can be obtained while collecting the fine dust sample of the sample group.

For reference, in the configuration shown in (b) of FIG. 4, an example is shown in which measurement or sampling is performed while the filter moves by 1/3 of the measurement spot interval. However, the distance between measurement spots and the filter for each measurement or sampling are shown. The forward movement distance, etc. may vary depending on implementation and embodiment. In this way, by implementing continuous measurement and collection of multiple sampling groups, the waste of filters is minimized to save resources, and at the same time, data reliability regarding fine dust measurement can be further improved by securing multiple sample data.

As described above, according to the device for measuring fine dust in a chimney according to an embodiment of the present invention, the error in measuring fine dust is reduced by excluding condensation of moisture in the exhaust gas in the chimney. Reliability can be improved by minimizing.

In addition, according to the device for measuring fine dust in a chimney according to an embodiment of the present invention, the zero point for measuring fine dust can be obtained without rewinding the Betaray roll, thereby eliminating the problem of the Betaray roll being cut due to moisture. It can effectively resolve the problem and enable continuous fine dust measurement.

In addition, according to the fine dust measurement device in the chimney according to an embodiment of the present invention, a correction factor is added to the first sample measurement unit for measuring the fine dust reference value and the second sample measurement unit for obtaining the fine dust measurement value. By measuring the amount of fine dust in the chimney, it is possible to measure fine dust more accurately and precisely.

In addition, according to the chimney fine dust measurement device according to an embodiment of the present invention, continuous collection and measurement of different sampling groups is possible, thereby preventing waste of beta ray filters and securing multiple data. Data reliability regarding fine dust measurement can be improved.

As described above, the optimal embodiments are disclosed in the drawings and specifications. Although specific terms are used here, they are used only for the purpose of explaining the present invention and are not used to limit the meaning or scope of the present invention described in the claims. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached patent claims.

10: sample collection unit 11: sample collection device
12: heating suction pipe 13: heating conduit
15: Suction air discharge pipe 16: First temperature sensor
20: first insulation part 21: first insulation wall
22: first insulation plate 30: first sample measuring unit
31: Beta-ray detector housing 32: Span calibration ball
33: Cooling fan 33-1: Peltier element
35: Beta Ray source mounting part 36: Beta Ray source
38: second temperature sensor 39: beta ray detector
40: Open/close control unit 44: Lifting member
45: Lifting drive motor 46: Adhesion member
50: filter unit 51: filter carrier
52: Photo sensor 54: Sample collection filter
55: Carrier stand 56: Measurement sample storage
57: first sample measurement filter 58: second sample measurement filter
60: Control unit 70: Second sample measuring unit
71: Beta-ray detector housing 72: Span calibration ball
73: Cooling fan 73-1: Peltier element
75: Beta Ray source mounting part 76: Beta Ray source
78: third temperature sensor 79: beta ray detector
80: second insulation part 81: second insulation wall
82: second insulation plate 82-1: dryer
100: Fine dust measurement device in the chimney

Claims (8)

A fine dust measuring device (100) in a chimney, which has a higher amount of moisture and a higher temperature than the general atmosphere,
A first sample measuring unit 30 for measuring a fine dust standard value;
A sample collection unit (10) configured to collect fine dust samples from exhaust gas in the chimney;
A second sample measurement unit 70 configured to obtain a measurement value of fine dust in the chimney based on the fine dust sample collected from the sample collection unit 10;
Based on the fine dust reference value measured by the first sample measuring unit 30 and the fine dust measurement value obtained by the second sample measuring unit 70, and the first sample measuring unit 30 and a control unit 60 configured to calculate the amount of fine dust in the chimney by additionally considering at least one correction factor among the second sample measuring units 70;
a first insulation unit 20 configured to spatially separate the first sample measurement unit 30 and the sample collection unit 10 from each other and at the same time insulate them from each other; and
It includes a second insulation unit 80 configured to spatially separate the sample collection unit 10 and the second sample measurement unit 70 from each other and at the same time insulate them from each other,
The correction factor is set periodically and implemented as a ratio-based correction factor or an addition-subtraction-based correction factor,
Measurement of fine dust reference values by the first sample measurement unit 30 for three sampling groups by moving the filter forward by 1/3 of the measurement spot interval, and measurement of fine dust samples by the sample collection unit 10 Collection and acquisition of fine dust measurement values by the second sample measuring unit 70 are performed simultaneously,
The constant temperature condition regarding the sample measurement temperature is satisfied in the first sample measuring unit 30 by the first insulation unit 20, and the fine dust reference value is measured in the first sample measuring unit 30, The high temperature condition for excluding moisture is met by gasifying the water vapor contained in the fine dust sample in the sample collection unit 10 by the first insulation unit 20 and the second insulation unit 80, thereby satisfying the sample collection unit 10. The fine dust sample is collected at (10), and the constant temperature condition regarding the sample measurement temperature is satisfied in the second sample measurement unit 70 by the second insulation unit 80, so that the second sample measurement unit 70 ), the amount of fine dust is measured from the exhaust gas in the chimney without rollback by obtaining the fine dust measurement value,
Fine dust measurement device in the chimney (100). delete According to claim 1,
The control unit 60 operates the chimney based on the difference between the fine dust reference value measured by the first sample measuring unit 30 and the fine dust measurement value obtained by the second sample measuring unit 70. It is additionally configured to calculate the amount of fine dust in the body,
Fine dust measurement device in the chimney (100). delete According to claim 1,
The first sample measuring unit 30 is configured to measure the fine dust reference value using a beta-ray source 36 and a beta-ray detector 39,
The second sample measuring unit 70 is configured to obtain the fine dust measurement value by utilizing the beta-ray source 76 and the beta-ray detector 79.
Fine dust measurement device in the chimney (100). delete delete According to claim 1,
The second insulation unit 80 includes an insulation plate 82 configured to block heat conduction between the sample collection unit 10 and the second sample measurement unit 70,
A dryer 82-1 is provided on at least a portion of the bottom of the insulation plate 82,
Fine dust measurement device in the chimney (100).