KR102260692B1 - Apparatus for real-time measuring partical matter from stack emission - Google Patents

Abstract

A real-time measurement device for fine dust emissions from chimneys according to the present invention comprises: a particle size separator for separating fine dust in the sample in which a part of the exhaust gas discharged from the chimney is sucked; a dust measuring unit that collects the collected fine dust in real time and measures the amount of the collected fine dust; a dehumidifying unit condensing moisture in the sample from which the collected fine dust has been removed; a flow rate control unit for maintaining a flow rate of the sample in the particle size separation unit at a specified target flow rate; and a control unit including a first control unit for controlling the respective temperatures of the particle size separation unit and the dust measuring unit, and a second control unit for calculating the actual flow rate of the sample in the particle size separation unit and controlling the flow rate control unit.

Description

Real-time measurement device for fine dust emissions from chimneys {APPARATUS FOR REAL-TIME MEASURING PARTICAL MATTER FROM STACK EMISSION}

The present invention relates to a real-time measurement device for fine dust from a chimney, and to a device for measuring real-time fine dust from a chimney that accurately controls the flow rate of a sample to a specified amount by calculating the actual flow rate of a sample flowing into the device.

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 using the thermal power, and incinerators that incinerate industrial waste or general household waste. Such harmful substances may include combustion gases such as particulate matter, halogen gas, nitrogen oxide, sulfurous acid gas, carbon monoxide, hydrogen chloride, ammonia, and the like. It has been proven through various investigations and experiments that such harmful substances not only cause various diseases but also adversely affect the natural environment when they are absorbed and then accumulated in the human body.

For this reason, worldwide incinerators and businesses that use fossil fuels are regulated by strong laws, and in Korea, the emission concentration of hazardous substances included in exhaust gas is limited through a notice from the Ministry of Environment.

Among the methods for measuring the concentration of particulate matter (PM) such as fine dust, the beta-ray measurement method, which uses the attenuation principle of beta-rays to measure the concentration of particulate matter, has the advantage of being able to measure in real time and at the same time having a relatively small measurement error. There is this.

In addition, in the case of dust emitted from the chimney, the concentration distribution for each particle size is varied, but only the concentration of the total dust is measured in real time due to the limitations of current measurement technology. For air environment management, it is necessary to calculate the amount of emission by measuring the concentration of each particle size such as ultra-fine dust, fine dust, or total dust.

Exhaust gas discharged from the chimney, not the general atmosphere, has a high temperature of 100 degrees or more and a high moisture concentration, so when exposed to the general atmospheric temperature, it condenses to generate water, thereby maintaining accurate measurement flow and reducing fine dust concentration. Measurement is not possible.

Accurate flow control in the particle size separator is essential for the treatment of condensate due to the high temperature and humidity of the chimney environment and for measuring the dust concentration by particle size.

The present invention provides a real-time measurement device for fine dust emitted from a chimney, in which the flow rate measured by a particle size separator is precisely controlled in order to measure the concentration of fine dust by particle size and treatment of condensate generated due to a high temperature and high humidity chimney environment.

A real-time apparatus for measuring fine dust emitted from a chimney according to an embodiment of the present invention includes: a particle size separator for separating fine dust in a sample in which a part of exhaust gas discharged from a chimney is sucked; a dust measuring unit for collecting the collected fine dust and measuring the amount of the collected fine dust in real time; a dehumidifying unit condensing moisture in the sample from which the collected fine dust has been removed; a flow rate control unit for maintaining a flow rate of the sample in the particle size separation unit at a specified target flow rate; and a control unit including a first control unit for controlling the respective temperatures of the particle size separation unit and the dust measuring unit, and a second control unit for calculating the actual flow rate of the sample in the particle size separation unit and controlling the flow rate control unit .

In addition, it further comprises a first heating means for heating the particle size separation unit, and a second heating unit for heating the dust measuring unit, wherein the first control unit, the temperature of the particle size separation unit through the first heating means is adjusted to the chimney The temperature is controlled to be equal to or higher than the internal temperature, and the first control unit controls the temperature of the dust measuring unit to be maintained above a predetermined temperature exceeding the dew point of the sample through the second heating means.

In addition, the particle size separation unit includes a first temperature sensor and a moisture sensor, the flow rate control unit includes a flow sensor, and the second control unit includes the temperature of the sample received from the first temperature sensor and the moisture sensor. The actual flow rate of the sample in the particle size separator is calculated by using the received moisture concentration of the sample and flow information remaining after moisture condensation of the sample received from the flow sensor.

In addition, the flow control unit includes a pump, and the second control unit controls the pump so that the calculated actual flow rate of the sample is maintained at the specified target flow rate required to separate fine dust in the particle size separator.

In addition, the control unit includes a third control unit, wherein the third control unit uses the actual flow rate of the sample calculated by the second control unit and the amount of fine dust measured by the dust measuring unit to fine dust in the exhaust gas derive the concentration.

In addition, the dust measuring unit measures the amount of the collected fine dust by using a beta-ray absorption method.

The method for real-time measurement of fine dust emitted from a chimney according to an embodiment of the present invention is a method of measuring the concentration of fine dust in exhaust gas discharged from a chimney in real time, wherein the fine dust in a sample in which a part of the exhaust gas is sucked is separated to do; collecting the collected fine dust and measuring the amount of the collected fine dust in real time; condensing moisture in the sample from which the collected fine dust has been removed; calculating an actual flow rate of the sucked sample; and adjusting the flow rate of the sucked sample to a specified target flow rate.

In addition, adjusting the temperature of the sample so that the temperature of the sample in the step of separating the fine dust in the sample from which a part of the exhaust gas is sucked is maintained equal to or higher than the temperature in the chimney; and controlling the temperature of the sample so that the temperature of the sample in the step of collecting the collected fine dust and measuring the amount of the collected fine dust in real time is maintained above a predetermined temperature exceeding the dew point of the sample further includes

In addition, the step of calculating the actual flow rate of the inhaled sample may include condensing the temperature and moisture concentration of the sample and moisture in the sample in the step of separating fine dust in the sample from which a part of the exhaust gas is sucked. Calculate the actual flow rate of the sucked sample by using the remaining flow rate information after moisture condensation of the sample.

In addition, in the step of adjusting the flow rate of the suctioned sample to a specified target flow rate, the actual flow rate of the suctioned sample calculated in the step of calculating the actual flow rate of the suctioned sample separates fine dust in the suctioned sample Control a pump disposed on the flow of the sample to maintain the specified target flow rate required in the step.

In addition, the concentration of fine dust in the exhaust gas is derived using the amount of fine dust measured in the step of collecting the calculated actual flow rate of the sample and the collected fine dust and measuring the amount of the collected fine dust in real time further comprising the step of

In addition, the step of collecting the collected fine dust and measuring the amount of the collected fine dust in real time measures the amount of the collected fine dust using a beta-ray absorption method.

The real-time device for measuring fine dust from a chimney according to the present invention can accurately control the flow rate of a measurement sample sucked into the device among exhaust gases discharged from a chimney, so that it is possible to measure the concentration of fine dust in the exhaust gas by particle diameter with high precision. have.

The device for real-time measurement of fine dust from a chimney according to the present invention is required in particle size separation through the treatment of condensed water generated due to the temperature difference between the temperature of the exhaust gas in the chimney and the temperature difference in the measurement environment and the calculation of the actual flow rate of the sample in consideration of the temperature difference It is possible to control the flow rate of the measurement sample with the specified flow rate.

The real-time chimney emission fine dust measurement apparatus according to the present invention may derive an accurate chimney emission fine dust concentration in real time through temperature control for each location of a measurement sample.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

1 is a block diagram of an apparatus for real-time measurement of fine dust emitted from a chimney according to an embodiment of the present invention.
2 is a block diagram illustrating a part of an apparatus for real-time measurement of fine dust emitted from a chimney according to an embodiment of the present invention.
3 is a flowchart of a method for real-time measurement of fine dust emitted from a chimney according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in this specification are terms defined in consideration of the function of the present invention, which may vary according to the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

In addition, the embodiments disclosed below do not limit the scope of the present invention, but are merely exemplary matters of the components presented in the claims of the present invention, and are included in the technical spirit throughout the specification of the present invention and the scope of the claims. Embodiments including substitutable components as equivalents in components may be included in the scope of the present invention.

And in the embodiments disclosed below, terms such as “first”, “second”, “one side”, and “other side” are used to distinguish one component from other components, and the component is the term are not limited by Hereinafter, in describing the present invention, detailed descriptions of known techniques that may obscure the gist of the present invention will be omitted.

1 is a block diagram of a real-time chimney emission fine dust measurement apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a part of a real-time chimney emission fine dust real-time measurement apparatus according to an embodiment of the present invention.

1 and 2 , an apparatus for real-time measurement of chimney emission fine dust according to an embodiment of the present invention includes a particle size separation unit 100 , a dust measurement unit 200 , a dehumidifier 300 , and a flow rate control unit 400 . ) and a control unit 500 . The sucked sample corresponding to a part of the exhaust gas discharged from the chimney moves through the particle size separation unit 100, the dust measuring unit 200, the dehumidifying unit 300, and the flow rate control unit 400 in order, and the device is The concentration of fine dust in the exhaust gas discharged from the chimney is obtained by measuring the amount of fine dust in the inhaled sample.

The particle size separator 100 includes the particle size separator 110 , the sensors 120 including the moisture sensor and the temperature sensor, and separates and collects fine dust in the sample in which a part of the exhaust gas discharged from the chimney is sucked. do.

Among the particulate matter, ultrafine dust with a diameter of 2.5 μm or less is generated when fossil fuels such as coal or oil are burned or when gas is emitted from factories and automobiles. Dust with a diameter of 10 μm or less is called fine dust and is called sand. The main components are yellow dust, which is dust, and scattering dust blown by the wind.

In an embodiment, the particle size separator 110 separates only ultrafine dust from particulate matter in the exhaust gas by passing only particles having a diameter of 2.5 μm or less.

The particle size separator 110 uses a cyclone type or an impactor type, and since both types of particle size separators use the inertia of particulate matter to separate dust having a particle diameter less than a certain diameter, the flow rate per minute in the particle size separator is specified and maintaining the flow rate per minute in the particle size separator at a specified amount has a dominant influence on the separation efficiency of the particle size separator. In other words, in order to accurately separate only particles of ultrafine dust or less in the exhaust gas, it is absolutely necessary to fix and maintain the flow rate per minute of the sample sucked into the particle size separator at a precisely specified amount.

In the sensors 120 , the first temperature sensor senses the temperature of the particle size separation unit and transmits information on the temperature T1 of the particle size separation unit sensed to the controller 500 , which will be described later.

In the sensors 120 , the moisture sensor detects the moisture concentration of the sample in the particle size separation unit and transmits information on the moisture concentration H1 of the sample in the particle size separation unit sensed to the control unit 500 .

In the illustrated embodiment, the particle size separation unit 100 further includes a connection pipe 130 for introducing fine dust, particularly, a sample from which ultrafine dust is separated and collected, into the dust measuring unit 200 . The connection pipe 130 not only provides a space for the sample to move, but also serves to spatially separate the particle size separation unit 100 and the dust measuring unit 200 .

The particle size separating unit 100 and the dust measuring unit 200 have different temperature ranges to be reached or maintained in order to prevent the sample from condensing and to prevent deterioration of the included parts, respectively. That is, the dust measuring unit 200 should be in a temperature range lower than the temperature in the particle size separating unit 100 . For the same reason as described above, the particle size separation unit 100 and the dust measuring unit 200 must be spatially separated for temperature control, and the particle size separating unit 100 and the dust measuring unit 200 must be separated by adjusting the length of the connecting pipe 130 . ), there is a spatial separation between

The particle size separation unit 100 further includes a first heating means (not shown). The first heating means is operated so that the temperature of the particle size separation unit is maintained equal to or higher than the temperature in the chimney by the control command of the first control unit, which will be described later. Condensation of moisture in the sample in the particle size separation unit is prevented by the operation of the first heating means according to the control command.

The first heating means includes, for example, a heating wire and a heat insulating material, and is provided to surround the outer wall of the particle size separator 110 and the outer wall of a part of the connection pipe 130 on the particle size separation unit 100 side.

The dust measuring unit 200 collects the fine dust collected and moved by the particle size separation unit, and measures the amount of the collected fine dust. In the illustrated embodiment, the amount of fine dust is measured by a beta-ray absorption method using beta-rays. In an embodiment using the beta-ray absorption method, the dust measuring unit 200 includes a collecting space 210 , a beta-ray source 220 , a beta-ray sensor 230 , and a filter 240 .

In the dust measuring unit 200, the fine dust in the sample that has moved to the collection space 210 is collected on the filter 240, and the beta-ray output from the beta-ray source 220 is collected by the filter 240 in which the fine dust is collected. The attenuation degree of the beta-ray passing through the irradiated and fine dust-collected filter 240 is measured by the beta-ray sensor 230 . Here, the attenuation degree of beta-rays has a certain correlation with the mass of fine dust, and the amount of fine dust collected by the attenuation degree of beta-rays measured through this correlation is measured in mass units.

In this embodiment, in order to measure the amount of fine dust in real time through the beta-ray absorption method, the filter 240 is a roll filter wound on a rotatable shaft, and it is unwound by the rotation of the roll 241 before collection, and the collection space ( 210), collects fine dust while staying in the collection space 210 for a certain period of time, and after measurement by beta rays, it is collected and wound on a roll 242. Since the filter 240 is implemented as a roll filter, the amount of fine dust using beta rays is measured in real time without replacing a separate filter.

The dust measuring unit 200 further includes a second temperature sensor 250 and a second heating means (not shown). The second temperature sensor 250 senses the temperature of the dust measurement unit 200 and transmits temperature information of the dust measurement unit 200 to the control unit 500 to be described later. According to a control command from the first controller to be described later, the second heating unit is operated so that the temperature of the dust measuring unit is maintained above a predetermined temperature to prevent moisture contained in the sample from condensing and to prevent malfunction of the beta-ray measuring unit.

Here, the predetermined temperature is determined in a temperature range between the maximum temperature exceeding the dew point of the sample determined by the moisture concentration of the sample and the maximum temperature at which the beta-ray meter can operate normally.

The dust measuring unit accurately measures the amount of fine dust because moisture in the sample does not condense on the filter and only fine dust in a dry state is collected in the filter by the operation of the second heating means according to the control command of the first control unit. and the reliability of the data provided by the dust measuring unit can be increased.

The second heating means is provided to surround the outer wall of the collecting space 210 and the outer wall of a part of the connecting pipe 130 on the dust measuring unit 200 side in a configuration including, for example, a heating wire and a heat insulating material.

The dehumidifying unit 300 condenses, separates, and discharges moisture in the sample from which the fine dust collected by the dust measuring unit 200 is removed. Moisture in the sample is maintained in a gaseous state without condensing in the particle size separation unit 100 and the dust measuring unit 200 through temperature control, and is condensed into a liquid phase at about 3° C. while passing through the dehumidifying unit 300, and the moisture filter ( 310) and discharged by a liquid pump 320.

The flow rate control unit 400 is a flow rate sensor 410 that measures the flow rate of the sample in a state in which moisture is removed from the dehumidifying unit 300 in order to maintain the flow rate of the sample sucked into the particle size separation unit 100 at a specified target flow rate. and a third temperature sensor 420 for measuring the temperature and a pump 430 disposed on a path through which the sample moves.

The flow sensor 410 is sucked into the device and passes through the particle size separation unit, the dust measuring unit, and the dehumidifying unit to detect the flow rate of the sample in which particles exceeding the particle size separation standard size, fine dust, and moisture are removed, and the particle size separation unit In order to calculate the actual flow rate of the sample at 100 , the sensed sample flow rate Q1 information is transmitted to the controller 500 .

The third temperature sensor 420 detects the temperature of the sample in the flow sensor 410 required to calculate the actual flow rate of the sample in the particle size separator 100 , and provides temperature information of the sample in the flow sensor 410 . do. In one embodiment, the temperature around the flow sensor is maintained at room temperature, and this is checked through the third temperature sensor.

The pump 430 is a means for controlling the flow rate of the sample flowing into the device, that is, the sample in the particle size separator 100 , and corresponds to a flow rate control means for increasing or decreasing the flow rate per minute of the sample in the gas phase. The pump 430 is operated by a command from the second control unit 520 , which will be described later.

The control unit 500 includes a first control unit 510 for controlling the respective temperatures of the particle size separation unit 100 and the dust measuring unit 200 , and a second control unit for calculating the actual flow rate of the sample in the particle size separation unit and controlling the flow rate control unit. It includes a control unit 520 and a third control unit 530 for deriving the concentration of fine dust in the exhaust gas.

In the case of flue exhaust gas, the temperature is higher than 100 degrees and the moisture concentration is high, so when exposed to atmospheric temperature, water is condensed and water is generated, which makes it impossible to maintain and measure the exact flow rate.

In order for the real-time chimney emission fine dust measuring device according to the present invention to accurately measure the fine dust concentration, the amount of fine dust in the sample must be accurately measured and the flow rate of the measurement sample sucked into the device must be accurately known. In addition, in order to improve the measurement reliability of the device through the improvement of the separation efficiency for each particle size of fine dust in the sample, it is necessary to accurately predict and maintain the flow rate of the sample in the particle size separation unit. Furthermore, in order to control the flow rate of the sample in the particle size separation unit, it is necessary to control the temperature of the particle size separation unit uniformly and accurately compensate for the decrease in the flow rate due to the condensed moisture due to the cooling of the sample. Accordingly, the control unit 500 performs temperature control of each configuration and calculation and control of the flow rate of the sample corrected for the amount of condensed moisture in order to improve the measurement reliability of the real-time chimney emission fine dust measurement device according to the present invention.

The first control unit 510 receives the temperature (T1) information of the particle size separation unit from the first temperature sensor, and uses the received temperature (T1) information of the particle size separation unit to control the particle size separation unit 100 through the first heating means. Adjust so that the temperature remains the same or higher than the temperature in the chimney.

The first control unit 510 receives moisture concentration information in the sample from the moisture sensor, receives temperature information of the dust measurement unit from the second temperature sensor, and calculates the dew point of the sample using the received moisture concentration information in the sample, Using the temperature information of the dust measuring unit, the temperature of the dust measuring unit 200 is controlled to be maintained above a predetermined temperature exceeding the dew point of the sample through the second heating means.

In one embodiment, the first control unit 510 calculates the dew point as 54.3 ° C using the information that the moisture concentration of the sample is 15%, and the temperature of the dust measuring unit 200 exceeds the dew point of the sample at 70 ° C. Adjust the second heating means to be maintained. In addition, it was confirmed that the operation of the beta-ray meter was performed smoothly at a temperature of 70 °C. When the temperature in the chimney is 150°C, the first control unit 510 controls the first heating means so that the temperature of the particle size separation unit is maintained at 150°C.

By controlling the temperature of the particle size separation unit and the dust measuring unit of the first control unit 510, condensation during the measurement of the sample is prevented, and the amount of fine dust can be accurately measured.

The second control unit 520 receives the temperature (T1) information of the sample in the particle size separation unit from the first temperature sensor, receives information on the moisture concentration (H1) in the sample from the moisture sensor, and the third temperature sensor 420 . ) receives the temperature (T3) information of the sample from which moisture has been removed through the dehumidifying unit 300, and the flow rate (Q1) information of the remaining sample from which the moisture has been removed through the dehumidifying unit 300 from the flow sensor 410 receive

The second control unit 520 includes temperature (T1) information of the sample in the particle size separation unit, moisture concentration (H1) in the sample, temperature (T3) information of the sample from which moisture is removed through the dehumidifying unit 300 and the dehumidifying unit. The actual flow rate (Qt) of the sample in the particle size separation unit is calculated using information on the flow rate (Q1) of the remaining sample from which moisture has been removed through (300). At this time, when T3 is fixed to the flow rate converted to 0° C., the second control unit 520 calculates the actual flow rate Qt of the sample in the particle size separation unit through Equation 1.

Equation 1

The second control unit 520 controls the operation of the pump 430 so that the calculated actual flow rate of the sample is maintained at a specified target flow rate required to separate fine dust from the particle size separation unit.

In one embodiment, the specified target flow rate required for the particle size separator to separate ultrafine dust with a diameter of 2.5 μm or less is 5 liters per minute, T1 is 150° C., H1 is 15%, and the flow rate measured at T3 temperature is 0 In the case of the flow rate converted to °C, if 5 liters per minute is substituted for Qt in Equation 1 so that the actual flow rate (Qt) of the sample in the particle size separation unit is equal to the specified target flow rate (5 liters per minute), Q1 is 2.73 ( L/min). The second control unit 520 may operate the pump 430 such that the flow rate Q1 information of the remaining sample from which the moisture has been removed, received from the flow sensor, coincides with the calculated 2.73 (L/min). Conversely, by the operation of the pump 430 according to the control command of the second control unit 520, the actual flow rate of the sample in the particle size separation unit matches the specified target flow rate required to separate fine dust in the particle size separation unit, and the adjusted to maintain consistency.

The third control unit 530 is configured to control the temperature by the first control unit and control the flow rate through the removal of condensed water by the second control unit in a state where the actual flow rate of the sample and the data of the amount of fine dust obtained in a stabilized state are used to discharge the exhaust gas discharged from the chimney. The concentration of fine dust in the gas is derived. The third control unit 530 receives the actual flow rate information of the sample calculated from the second control unit, and receives information on the amount of fine dust measured by the dust measuring unit.

3 is a flowchart of a method for real-time measurement of fine dust emitted from a chimney according to an embodiment of the present invention.

Referring to FIG. 3 , the method for real-time measurement of chimney emission fine dust according to an embodiment of the present invention is performed by the device for real-time measurement of chimney emission fine dust according to the present invention, and a part of the exhaust gas discharged from the chimney is sucked. Separating fine dust in the sample (S100), collecting the collected fine dust and measuring the amount of the collected fine dust in real time (S200), condensing moisture in the sample from which the collected fine dust is removed (S300), calculating the actual flow rate of the sucked sample (S400), adjusting the flow rate of the sucked sample to a specified target flow rate (S500) and deriving the concentration of fine dust in the exhaust gas (S600) do.

Step S100 is performed by the particle size separator 110 of the particle size separation unit 100 of the real-time measurement device for chimney emission fine dust according to the present invention. As described above, the particle size separator 110 separates fine dust in the sucked sample by particle size, and separates ultrafine dust having a diameter of 2.5 μm or less as an example.

Step S200 is performed by the dust measuring unit 200 of the device. As an embodiment, a beta-ray measurement method of measuring the amount of fine dust collected in real time by irradiating beta-rays to the fine dust collected in a roll filter whose movement is controlled to detect the attenuation degree of the beta-rays is performed in this step.

In the method according to the present invention, while steps S100 and S200 are performed, the step of controlling the temperature of the sample in each step is also performed. The temperature of the sample in step S100 is adjusted to be equal to or higher than the temperature in the chimney, and the temperature of the sample in step S200 is adjusted to be maintained above a predetermined temperature exceeding the dew point of the sample. The step of adjusting the temperature of the sample is performed by the first control unit 510 of the device, and is performed as described for the first control unit 510 .

Step S300 is performed by the dehumidifying unit 300 of the device, and is the same as the description of the dehumidifying unit 300 . In step S300, the gaseous sample passing through the particle size separation unit and the dust measuring unit in which the temperature of the sample is controlled so that condensation does not occur is exposed to the atmospheric environment without temperature control, thereby preventing sporadic generation of condensed water. In addition, step S300 becomes an indispensable basic step for controlling the flow rate of the sample in steps S400 and S500 to be described later through accurate measurement of the flow rate of the remaining sample from which moisture has been removed.

Step S400 is performed by the second control unit 520 of the device, and the sample sucked into the particle size separator using the temperature and moisture concentration of the sample in step S100 and the flow rate information remaining after the moisture condensation of the sample after step S300 is used. The actual flow rate of Step S400 is the same as the description of the second control unit 520 .

Step S500 is performed by the second control unit 520 of the device, and in this step, a pump disposed on the flow of the sample so that the actual flow rate of the sample calculated in step S400 is maintained at the specified target flow rate required in step S100. The operation of 430 is controlled. The details of step S500 are the same as the description of the second control unit 520 .

Step S600 is performed by the third control unit 530 of the device, and the concentration of fine dust in the exhaust gas is derived using the actual flow rate of the sample calculated in step S400 and the amount of fine dust measured in step S200. Details of step S600 are the same as those of the third control unit 530 .

Claims (12)

Particle size separator for separating fine dust in a sample in which a part of the exhaust gas discharged from the chimney is sucked;
a dust measuring unit that collects the separated fine dust in real time and measures the amount of the collected fine dust;
a dehumidifying unit condensing moisture in the sample from which the collected fine dust has been removed;
a flow rate control unit for maintaining the sample flow rate in the particle size separation unit at a specified target flow rate; and
A control unit including a first control unit for controlling the temperature of each of the particle size separation unit and the dust measuring unit, and a second control unit for calculating the actual flow rate of the sample in the particle size separation unit and controlling the flow rate control unit,
The particle size separation unit includes a first temperature sensor and a moisture sensor,
The flow control unit includes a flow sensor,
The second control unit, the temperature of the sample received from the first temperature sensor, the moisture concentration of the sample received from the moisture sensor, and the flow rate information remaining after condensation of the moisture of the sample received from the flow sensor is used to calculate the actual flow rate of the sample in the particle size separation unit, a chimney emission fine dust real-time measurement device.
The method according to claim 1,
a first heating means for heating the particle size separation unit; and
Further comprising a second heating means for heating the dust measuring unit,
The first control unit controls the temperature of the particle size separation unit to be maintained equal to or higher than the temperature in the chimney through the first heating means,
The first control unit controls the temperature of the dust measuring unit to be maintained above a predetermined temperature exceeding the dew point of the sample through the second heating means, a chimney emission fine dust real-time measuring device.
delete The method according to claim 1,
The flow control unit includes a pump,
The second control unit controls the pump so that the calculated actual flow rate of the sample is maintained at the specified target flow rate required to separate fine dust in the particle size separation unit, the chimney emission fine dust real-time measurement device.
5. The method according to claim 4,
The control unit includes a third control unit,
The third control unit, a real-time measurement device of chimney emission fine dust to derive the fine dust concentration in the exhaust gas using the actual flow rate of the sample calculated by the second control unit and the amount of fine dust measured by the dust measuring unit .
The method according to claim 1,
The dust measuring unit measures the amount of the collected fine dust using a beta-ray absorption method, a chimney emission fine dust real-time measurement device.
In the method of measuring the concentration of fine dust in exhaust gas discharged from a chimney in real time,
separating the fine dust in the sample from which a part of the exhaust gas is sucked;
collecting the separated fine dust and measuring the amount of the collected fine dust in real time;
condensing moisture in the sample from which the collected fine dust has been removed;
calculating an actual flow rate of the sucked sample; and
Adjusting the flow rate of the sucked sample to a specified target flow rate,
Calculating the actual flow rate of the sucked sample comprises:
The temperature and moisture concentration of the sample in the step of separating and collecting fine dust in the sample in which a part of the exhaust gas is sucked, and the flow rate information of the remainder after condensation of the moisture in the sample after the step of condensing the moisture in the sample to calculate the actual flow rate of the inhaled sample, a real-time measurement method of fine dust emitted from the chimney
8. The method of claim 7,
adjusting the temperature of the sample so that the temperature of the sample in the step of separating the fine dust in the sample from which a part of the exhaust gas is sucked is maintained equal to or higher than the temperature in the chimney; and
controlling the temperature of the sample so that the temperature of the sample in the step of collecting the collected fine dust and measuring the amount of the collected fine dust in real time is maintained above a predetermined temperature exceeding the dew point of the sample; Further comprising, a method for real-time measurement of chimney exhaust fine dust.
delete 8. The method of claim 7,
The step of adjusting the flow rate of the sucked sample to a specified target flow rate,
disposed on the flow of the sample so that the actual flow rate of the sucked sample calculated in the step of calculating the actual flow rate of the sucked sample is maintained at the specified target flow rate required in the step of separating fine dust in the sucked sample A method of real-time measurement of fine dust emitted from the chimney, which controls the pump.
11. The method of claim 10,
Deriving the concentration of fine dust in the exhaust gas using the amount of fine dust measured in the step of collecting the calculated actual flow rate of the sample and the collected fine dust and measuring the amount of the collected fine dust in real time Further comprising, a real-time measurement method of fine dust exhaust from the chimney.
8. The method of claim 7,
The step of collecting the collected fine dust and measuring the amount of the collected fine dust in real time comprises:
A real-time measurement method of chimney emission fine dust for measuring the amount of the collected fine dust using a beta-ray absorption method.

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