KR101064267B1 - Sample exhaust gas extraction apparatus - Google Patents

Abstract

The present invention relates to a device for collecting the exhaust gas sample to measure the exhaust gas concentration of the air pollutant discharge facility, including an incinerator, a probe is installed so that one end is located inside the chimney, coupled through the probe and the suction port Is a liner and a collecting tube located inside the chimney, a cylindrical filter for filtering the sample flowing through the liner and the collecting tube, a connecting tube connecting the liner and the cylindrical filter, and the cylindrical filter It includes a heating holder for supporting, a support coupled to one end of the heating holder for supporting the connecting pipe, and a heating means installed in the heating holder.

Exhaust gas, sample, sampling, probe, heating holder, cylinder filter

Description

Exhaust gas sampling device {SAMPLE EXHAUST GAS EXTRACTION APPARATUS}

The present invention relates to an exhaust gas sampling apparatus, and more particularly, to an apparatus for collecting exhaust gas samples to measure the pollutant concentration of the gas discharged from an air pollutant discharge facility including an incinerator.

Gases emitted from fossil fuel-fired plants and power plants, and incinerators for industrial waste and household waste, contain a wide variety of hazardous substances. These harmful substances, such as dust, nitrogen oxides, sulfurous acid gas, hydrogen chloride, dioxin, etc. contained in the exhaust gas not only directly adversely affects the human body but also cause environmental pollution.

At present, international organizations are aware of the seriousness of environmental pollution caused by hazardous substances and have proposed standards for the emission of air pollutants, requiring countries to comply with them. In particular, in Korea, the law restricts the concentration of harmful substances contained in exhaust gases through laws and environmental notices.

On the other hand, hazardous materials prevention facilities are installed in factories, power plants and incinerators in order to reduce the concentration of harmful substances contained in the exhaust gas. In addition, an analyzer is installed to constantly analyze the components and concentrations of the hazardous substances contained in the gas discharged through the hazardous substance prevention facility.

In general, the analyzer for analyzing the harmful substances contained in the exhaust gas is a sampling method of taking a portion of the exhaust gas from the chimney and transporting it to an analyzer installed in the analysis chamber of a specific place and analyzing the analyzer directly on the chimney outer wall. It is divided into in situ method of installing and analyzing.

Among the above-described methods, the sampling type analyzer includes an exhaust gas sampling device for collecting a sample from a chimney, and an analysis device for analyzing a sample collected by the exhaust gas sampling device.

When the high-temperature exhaust gas is discharged to the outside through the sampling device, the primary removal of particulate matter contained in the exhaust gas is performed. In this process, water is condensed to generate condensed water. This condensate can cause deterioration of the performance of the vacuum pump during sampling of the discharged gas. To prevent this, it is necessary to filter particulate matter other than air pollutants to be sampled and to maintain evaporation of moisture to maintain the performance of the vacuum pump. There is. At this time, the heating box is used to heat the cylindrical filter portion in which the particulate matter is collected, thereby inducing evaporation of condensed water, thereby effectively filtering the particulate matter in the cylindrical filter.

Looking at the durable structure of the heating box, a cyclone that primarily filters particulate matter, a flask that collects particulate matter removed from the cyclone, a cylindrical filter that once again filters particulate matter that has passed through the cyclone, and a heating box It includes a heater for keeping the inside at a constant temperature.

By the way, the heating box of such a structure, the bulky and heavy weight is not easy to transport and install. For example, the exhaust gas sample is generally carried out at a point 20 to 30m above the ground. Therefore, if the volume and weight of the heating box as in the prior art, it is not easy to transport to the height, there is a risk of safety accidents. In addition, if the workbench space of the point is narrow, it is not easy to install, it is difficult to withstand the weight of the exhaust gas sampling device.

On the other hand, most of the components constituting the heating box, that is, the cyclone, the flask, the cylindrical filter and the connection pipe connecting the cyclone and the cylindrical filter is made of a material such as hard glass or quartz glass. However, since the above-mentioned parts are mostly connected by ball joints, more connection parts may cause leakage of samples, and assembly, cleaning, and management thereof may not be easy. In particular, there is a high possibility of being damaged in the process of transporting and installing the exhaust gas sampling device is not preferable.

The present invention is to solve the above-mentioned problems, and the object of the present invention is to provide an exhaust gas sampling device that is simple in structure, small in volume and light in weight, and easy to transport and install.

In addition, another object of the present invention is to minimize the use of superfluidic flow to reduce the risk of sample leakage and breakage, and to provide an exhaust gas sampling device that is easy to maintain.

Exhaust gas sampling device according to the present invention for achieving the above object, the probe is installed so that one end is located inside the chimney, the liner and the collecting pipe coupled through the probe and the suction port is located inside the chimney, A cylindrical filter for filtering the sample introduced through the liner and the collecting pipe, a connecting pipe connecting the liner and the cylindrical filter, a heating holder surrounding the cylindrical filter and supporting the cylindrical filter, and one end of the heating holder. And coupled to the support for supporting the connecting pipe, and the heating means installed in the heating holder.

The heating holder of the exhaust gas sample collection device described above includes first and second housings coupled to be opened and closed to replace the cylindrical filter installed therein, and the first and second housings. The heating means is installed in at least one of the.

The heating means for heating the cylindrical filter may be a heating pipe for heating by using a high-temperature fluid containing a heating wire or hot gas that generates heat when power is applied. And the heating means is preferably extended to the inside of the support to heat the sample transported through the connecting pipe. At this time, it is possible to operate other equipment, for example, a cooling pump, a lamp, etc. by using the power applied to the heating means.

On the other hand, the heating holder is provided with a temperature sensor, and further comprises a controller for controlling the operation of the heating means based on the temperature measured by the temperature sensor.

Exhaust gas sampling device according to the present invention configured as described above is simple to reduce the volume and weight by simplifying the structure of the heating holder is light, easy to transport and installation, can also eliminate the risk of safety accidents.

In addition, there is no fear of sample leakage and damage by omitting superfluidic components such as cyclones and flasks. In particular, by making the heating holder easy to open and close the structure to facilitate the replacement of the cylindrical filter can maintain the same filtration efficiency as before, very advantageous in terms of maintenance.

With reference to the accompanying drawings will be described embodiments of the present invention; In the following description of embodiments according to the present invention, and in adding reference numerals to the components of each drawing, the same reference numerals are added to the same components as much as possible even though they are shown in different drawings.

1 is a schematic diagram of an exhaust gas sampling device according to an embodiment of the present invention.

As shown in Figure 1, the exhaust gas sample collection device according to an embodiment of the present invention is large collection unit 100, the first processing unit 200, the second processing unit 300, the vacuum pump 400 and the controller It is made up of 500.

Collecting unit 100 is installed in the chimney is a portion where the sample is sucked from the exhaust gas. The sampling unit 100, the probe 110 is installed so that one end is located inside the chimney, the liner 120 is coupled through the probe 110, and the collecting tube is coupled to one end of the liner 120 ( 130 and a pitot tube 140 is installed at the same position as the collecting tube 130.

Among these, the collecting pipe 130 located inside the chimney is formed of a U-shaped, the inlet 132 is provided at one end thereof, the other end is connected to the liner 120. When the collection pipe 130 is installed, it is preferable that the inlet 132 is disposed to face the moving direction of the discharge gas. When installed in this way, constant speed suction is possible and the suction speed can be adjusted.

The pitot tube 140 is composed of a positive pressure tube 142 having an opening formed in the movement direction of the exhaust gas, and a voltage tube 144 having an opening formed in a direction opposite to the movement direction of the exhaust gas.

The pitot tube 140 is for measuring the flow rate of the exhaust gas, and calculates the difference between the voltage measured at the voltage tube 144 and the static pressure measured at the constant pressure tube 142, that is, the dynamic pressure, and calculates the flow rate of the exhaust gas. .

The flow rate of the exhaust gas is required for accurate analysis of the sample. When collecting dioxins or particulate matter, it is preferable that the suction speed of the sample is the same as that of the exhaust gas. To this end, in this embodiment, the flow rate of the exhaust gas is measured using the pitot tube 140 described above, and the sample is sucked at the same rate as the flow rate of the measured exhaust gas.

The inhalation process of the sample is described in more detail as follows.

First, when the flow rate of the exhaust gas measured through the pitot tube 140 is high and the dynamic pressure (difference between the voltage and the static pressure) is increased, the suction pressure of the sample is lowered by lowering the negative pressure in the exhaust gas sampling device using the controller 500. To increase. On the other hand, when the flow rate of the exhaust gas is low and the dynamic pressure is lowered, the negative pressure in the exhaust gas sampling device is increased to reduce the suction speed of the sample.

Using this method, the flow rate of the exhaust gas and the suction speed of the sample can be matched, thus enabling accurate analysis of the sample.

On the other hand, the negative pressure in the exhaust gas sampling device is controlled by the vacuum pump 400, the operation of the vacuum pump 400 is controlled by the controller 500. That is, the controller 500 controls the operation of the vacuum pump 400 according to the dynamic pressure of the exhaust gas measured by the pitot tube 140 to adjust the negative pressure. As a result, the suction speed of the sample is adjusted by the controller 500.

The first processing unit 200 of the exhaust gas sample collection device is a means for primary filtering the sample collected by the collecting unit 100. That is, moisture and particulate matter are removed from the collected sample.

The second processing unit 300 is a portion that absorbs the first filtered sample from the first processing unit 200 in the absorbent liquid, and is a means for separating only analyte material therefrom. For example, it may be an impinger box as shown in FIG. 1, that is, a plurality of impingers are arranged in a row and absorbed in multiple stages.

The vacuum pump 400 forms a negative pressure inside the exhaust gas sampling device. At this time, the suction speed of the sample is controlled by the negative pressure generated.

The controller 500 controls the operation of the collecting unit 100, the first processing unit 200, the second processing unit 300, and the vacuum pump 400. As described above, the suction speed of the sample may be adjusted by controlling the operation of the vacuum pump 400 according to the flow rate of the exhaust gas. In addition, the method further includes a function of adjusting an internal temperature of the heating holder 230 of FIG. 2 by turning on / off the heating means 250 of FIG. 5 installed in the first processing unit 200.

2 to 4 are views showing a heating holder in a closed state, an open state and a disassembled state of the exhaust gas sampling device according to an embodiment of the present invention, respectively.

As shown in FIG. 2, the first processing unit 200 includes a cylindrical filter 220 and a cylindrical filter 220 which are installed in parallel with the longitudinal direction of the liner 120 at one end of the liner 120 at the outlet side. Wrapping includes a heating holder 230 and a support 240 coupled to one end of the heating holder 230.

The cylindrical filter 220 has a filter 222 installed therein to remove moisture and particulate matter from the sample transferred through the liner 120. The cylindrical filter 220 is detachably coupled to the liner 120 because it may need to be replaced when sampling. In addition, it is easy to remove the cylindrical filter 220, the fastening means 224, such as a clamp is installed so that no gap is generated between the liner 120 and the cylindrical filter 220.

The heating holder 230 is for protecting the cylindrical filter 220 located therein. In addition, to maintain a constant temperature of the sample flowing inside the cylindrical filter 220.

The heating holder 230 for this purpose includes a first housing 232a and a second housing 232b coupled to the first housing 232a so as to be openable and closeable. In addition, a first seating groove 234a is formed in the first housing 232a to insert a lower portion of the cylindrical filter 220, and an upper portion of the cylindrical filter 220 is inserted in the second housing 232b. The second seating groove 234b is formed to be. In addition, elastic pads 236a and 236b are attached to inner walls of the first and second seating grooves 234a and 234b, respectively.

Since the heating holder 230 of the structure supports the cylindrical stop 220 through the first and second seating grooves 234a and 234b, the cylindrical stop 220 of hard glass and quartz material is transported and installed. It can prevent damage. In particular, the elastic pads 236a and 236b are attached to the inner walls of the first and second seating grooves 234a and 234b, thereby protecting the cylindrical stop 220 from vibration and impact.

The supporter 240 is coupled to one end of the heating holder 230 to support the probe rear end 110 and the liner 120, and the fixing member 242 is installed on the upper end of the supporter 240 to support the probe rear end 110. Prevent the flow of the liner 120. That is, the supporter 240 is integrally coupled with the heating holder 230, and has a structure for supporting the probe rear end 110, the liner 120, and the cylindrical filter 220 together with the heating holder 230.

The heating holder 230 and the supporter 240 having such a structure have the probe rear end 110, even if vibration and shock are applied through any one of the rear end of the probe 110, the liner 120, and the cylindrical stop 220. There is no fear that the connection between the liner 120 and the cylindrical filter 220 is misaligned. In addition, a flange 246 is formed at the end of the liner 120 to be connected to the cylindrical stop 220, the coupling by the fastening means 224 is sure.

Meanwhile, heating means (250 of FIGS. 5 and 6) is installed in the heating holder 230 to maintain the temperature of the sample by heating the cylindrical filter 220. A description with reference to FIGS. 5 and 6 is as follows.

5 is a cross-sectional view of the heating holder of the exhaust gas sampling device according to an embodiment of the present invention, Figure 6 is a cross-sectional view of the heating holder of the exhaust gas sampling device according to another embodiment of the present invention.

5 and 6, the heating means 250 is installed inside the heating holder 230, more specifically, inside the first and second housings 232a and 232b.

This heating means 250 is a means for keeping the sample temperature of the cylindrical filter 220 constant. More specifically, the sample is heated to a temperature above the dew point so that condensate does not occur inside the cylinder filter 220. The heating means 250 is preferably disposed along the circumference of the cylindrical filter 220 so as to evenly heat the cylindrical filter 220.

Meanwhile, the heating means 250 may be the heating wire 252 illustrated in FIG. 5 or the heating pipe 254 illustrated in FIG. 6.

Among them, the heating wire 252 is a heating element operated by a power source. When the power is applied through the terminals exposed to the outside of the first and second housings 232a and 232b, the cylindrical filter 220 may be heated. The heating wire 252 is easy to use, and can increase the temperature of the cylindrical filter 220 in a short time.

In addition, unlike the heating wire 252, the heating pipe 254 heats the cylindrical filter 220 using a high temperature fluid such as hot gas. That is, when hot gas is injected through the inlet exposed to the outside of the first and second housings 232a and 232b, the hot gas is circulated along the heating pipe 254 to heat the cylindrical reservoir 220. In this case, the hot gas may be discharge gas discharged through the chimney.

The temperature sensor 256 is installed inside the first and second housings 232a and 232b in which the heating means 250 is installed. The internal temperatures of the first and second housings 232a and 232b measured by the temperature sensor 252 are transmitted to the controller 500 of FIG. 1 and used to control the operation of the heating means 250. That is, the internal temperature of the first and second housings 232a and 232b is measured at all times, and the heating means 250 is operated through this to prevent the condensed water from occurring in the cylindrical filter 220.

On the other hand, the heating means 250 installed in the first housing 232a of the heating means 250 is preferably extended to the support (240). As such, when the heating means 250 is extended to the supporter 240, the condensed water in the liner 120 may be prevented to extend the life of the cylindrical filter 220.

7 to 9 are views showing a heating holder in a closed state, an open state and a disassembled state of the exhaust gas sampling device according to another embodiment of the present invention, respectively.

This embodiment is a structure used when the cylindrical filter 220 cannot be installed in parallel with the longitudinal direction of the liner 120 due to lack of space. Looking at this structure in detail with reference to Figure 7 as follows.

The first processing unit 200 is provided at the one end of the liner 120 and the L-shaped connecting pipe 210 coupled to one end of the liner 120 and the outlet side of the liner 120. It comprises a cylindrical filter 220 disposed perpendicularly to the support, a heating holder 230 surrounding the cylindrical filter 220, and a support 240 hinged to one end of the heating holder 230. In addition, a fastening means 224 such as a clamp is installed to prevent a gap between the liner 120 and the connection pipe 210 and between the connection pipe 210 and the cylindrical filter 220.

Among them, the heating holder 230 has the same structure as in the above-described embodiment. That is, the first housing 232a and the second housing 232b coupled to the first housing 232a so as to be open and closed, and the side of the cylindrical filter 220 is inserted into the first housing 232a. The first seating grooves 234a are formed. In addition, a second seating groove 234b is formed in the second housing 232b so that the other side of the cylindrical filter 220 is inserted, and elastic pads are formed on inner walls of the first and second seating grooves 234a and 234b. 236a and 236b are attached respectively.

The supporter 240 is hinged to the heating holder 230 to support the liner 120 and the cylindrical holder 220 which is disposed perpendicularly to the longitudinal direction of the liner 120 by the connector 210. .

The heating holder 230 and the supporter 240 having such a structure have the probe rear end 110, even if vibration and shock are applied through any one of the rear end of the probe 110, the liner 120, and the cylindrical stop 220. There is no fear that the connection between the liner 120 and the cylindrical filter 220 is misaligned. In particular, as described above, the fastening means 224 such as a clamp is installed so that a gap does not occur between the liner 120 and the connection pipe 210 and between the connection pipe 210 and the cylindrical stop 220. Do.

While the present invention has been described through the preferred embodiments, the above-described embodiments are merely illustrative of the technical idea of the present invention, and various changes may be made without departing from the technical idea of the present invention. Those with ordinary knowledge will understand. Therefore, the protection scope of the present invention should be interpreted not by the specific embodiments, but by the matters described in the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is a schematic diagram of an exhaust gas sampling device according to an embodiment of the present invention.

2 to 4 are views showing a heating holder in a closed state, an open state and a disassembled state of the exhaust gas sampling device according to an embodiment of the present invention, respectively.

5 is a cross-sectional view of the heating holder of the exhaust gas sampling device according to an embodiment of the present invention.

6 is a cross-sectional view of the heating holder of the exhaust gas sample collection device according to another embodiment of the present invention.

7 to 9 are views showing a heating holder in a closed state, an open state and a disassembled state of the exhaust gas sampling device according to another embodiment of the present invention, respectively.

* Description of the symbols for the main parts of the drawings *

100: collecting unit 110: probe

120: liner 130: collecting tube

140: pitot tube 200: the first processing unit

210: connector 220: cylindrical filter

230: heating holder 240: support

250: heating means 300: second processing unit

400: vacuum pump 500: controller

Claims (8)

A probe installed at one end of the chimney; A liner and a collecting tube coupled to the probe and having a suction port located inside the chimney; Cylindrical filter for filtering the sample flowing through the liner; A heating holder surrounding the cylindrical filter and supporting the cylindrical filter; A support coupled to one end of the heating holder and supporting the probe and the liner; And Exhaust gas sample collection device comprising a heating means installed in the heating holder. The method according to claim 1, The apparatus further comprises an L-shaped connecting tube coupled between the liner and the cylindrical filter, wherein the heating holder is hinged to the support. The method according to claim 2, The heating holder, A first housing in which a first seating groove is formed to insert a portion of the cylindrical filter; And Exhaust gas sampling device including a second housing coupled to the first housing so as to be openable and closed, the second housing is formed so that the remaining portion of the cylindrical filter is inserted. The method of claim 3, Exhaust gas sample collection device further comprises an elastic pad attached to the inner wall of the first and second seating groove. The method according to claim 4, Exhaust gas sampling device, characterized in that the fixing member surrounding the probe is installed on the support. The method according to claim 5, And a temperature sensor installed inside the heating holder, and a controller for controlling the operation of the heating means in accordance with the temperature measured by the temperature sensor. The method according to claim 6, The heating means, the exhaust gas sample collection device, characterized in that the heating wire surrounding the cylindrical filter in at least one of the first and second housing. The method according to claim 6, The heating means, the exhaust gas sample collection device, characterized in that the heating pipe surrounding the cylindrical filter in at least one of the first and second housing.

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