KR100788397B1 - Sample extraction device for exhaust gas - Google Patents

Abstract

A device for sampling exhaust gas is provided to increase the temperature of exhaust gas to a measurement temperature rapidly and to extend service life of the sampling device by providing heat uniformly over a device body. A device for sampling exhaust gas includes a body(200), a gas extraction pipe(300), a heater(400), and a distribution pipe(500). The body has a first flange to be attached to a chimney in the front of the body and a cylindrical part(230) in the rear. An inside of the cylindrical part is hollowed and an end of the cylindrical part is opened. The gas extraction pipe is connected to the front of the body so as to be protruded toward the inside of the chimney. A gas extraction hole(310) is formed on a bottom of the gas extraction pipe to extract the exhaust gas and prevents minute dust from flowing into the gas extraction hole. The heater is attached to an outside of the cylindrical part and provides heat for the exhaust gas extracted through the gas extraction pipe. The distribution pipe is inserted into an inside of the cylindrical part and has a second filter(510), a plurality of gas providing holes(540) and a compressed air inflow hole.

Description

Exhaust Gas Sampler {SAMPLE EXTRACTION DEVICE FOR EXHAUST GAS}

Figure 1 is a conventional diagram showing a schematic shape of the exhaust gas sampler used in the prior art,

2 is a perspective view of an exhaust gas sampler according to an embodiment of the present invention;

Exploded perspective view of the exhaust gas sampler of Figure 3,

4 is a perspective view of a state in which the main body of the exhaust gas sampler of FIG.

5A and 5B are exploded perspective views and a partially cutaway perspective view of a gas collecting tube of the exhaust gas sampler of FIG. 3;

6 is a perspective view showing a heater coupled to the main body of the exhaust gas sampler of FIG.

7A to 7C are perspective views, an exploded perspective view and a partially cut away perspective view of the distribution tube of FIG. 3;

8 is a use state diagram showing that the exhaust gas sampler according to an embodiment of the present invention to collect the sample gas,

9 is a state diagram showing that the exhaust gas sampler of FIG. 8 is injected with compressed air from the outside to clean the filter.

* Explanation of symbols for main parts of drawing *

100: exhaust gas sampler 200: main body

210: first flange 220: gas collection pipe insertion hole

230: cylindrical portion 240: second flange

300: gas collector 310: gas collector

320: first filter 400: heater

500: distribution pipe 510: second filter

520: filter coupling rod 530: flange

540: gas supply port 550: compressed air inlet

560 gas inlet hole

The present invention is installed in the chimney to monitor the safety of the gas discharged from industrial sites, including power plants and incinerators, more specifically installed in the chimney and installed in the exhaust gas analysis device for analyzing the exhaust gas in the chimney It relates to an exhaust gas sampler for supplying the exhaust gas to the exhaust gas analyzer after collecting the exhaust gas.

Incinerators that burn fossil fuels and generate power from the thermal power plant and incinerators that incinerate industrial wastes or general household waste are contained in the exhaust gas. The harmful substances include halogenated gases such as hydrogen chloride and combustion gases such as nitrogen oxides, sulfurous acid gases, oxygen monoxide, hydrogen fluoride and ammonia. These harmful substances are accumulated in the human body after being absorbed and cause various diseases as well as adverse effects on the natural environment have been proved through various investigations and experiments.

For the reasons mentioned above, workplaces that use incinerators and fossil fuels around the world are regulated by the law, and in Korea, the 'Environmental Notice' limits the amount of hazardous substances contained in the emissions. have. To this end, the Ministry of Environment announces the 'Air Pollution Process Test Method' and 'Emission Acceptance Standard Test Method' to manage and supervise the emission of harmful substances to a certain extent.

First, the method of measuring the halogen group gas containing hydrogen chloride absorbs the sample gas collected from the exhaust gas in the chimney in the absorbent liquid and then calculates the emission by measuring the concentration of hydrogen chloride dissolved in the absorbent liquid. It is called the ion electrode method. At this time, the 'Ministry of Environment Notice' is said to maintain the temperature of more than 180 ℃ until the sample gas collected from the chimney is supplied to the measuring device. This is to prevent the moisture contained in the sample gas agglomerates in the sampler and the connection tube while the sample gas is cooled, and the halogen group gas contained in the sample gas is not absorbed by the agglomerated liquid.

In the method of measuring nitrogen oxide, sulfurous acid gas, and oxygen monoxide, which are combustion gases other than halogen group gas, the sample gas collected in the sample collector is removed from the pretreatment device, and then measured by the measuring device using 'infrared absorption method'. . At this time, the 'Ministry of Environment' notice also states that the temperature of 150 ℃ or higher must be maintained until the sample gas collected from the chimney flows into the measuring device.

As described above, it can be seen that the method of measuring halogen group gas and other combustion gases is different in measuring harmful substances. In addition, the Ministry of Environment also notices the temperature supplied to the measuring device when sampling halogenated gases and other combustion gases. This is to accurately measure the amount of harmful substances from the sample gas without being influenced by external environment in consideration of the characteristics of halogen group gas and other combustion gases.

For this reason, a conventional sampler has been installed and operated separately for use in each measuring device in a chimney from which exhaust gas is discharged.

Referring to Figure 1, the conventional exhaust gas sampler 10 is a main body 20 attached to the chimney, a hollow tube attached to the front of the main body 20 to collect the exhaust gas on the front surface Collecting pipe 31 is provided for the collection pipe 30, the filter 51 provided in the main body 20 is provided with a filter 32 for blocking the inhalation of fine dust on the outside of the collecting port 31 ), The gas supply port 54 to which the connecting pipe is coupled to supply the exhaust gas passing through the filter 51 to the measuring device, and compressed from the outside to shake off the fine dust attached to the filters 32 and 51. It is configured to include a compressed air inlet 55 to which air is supplied.

As described above, the sampler is installed for the measuring device by the ion electrode method and the measuring device by the infrared absorption method as described above, and thus the installation cost is doubled. There was a problem.

In addition, the conventional sampler is a rod-shaped heater 40 is attached to one side of the main body in order to meet the 'environmental notice' so that the temperature of the sample gas collected is maintained at 150 ℃ or more or 180 ℃ or more have. However, the rod-shaped heater 40 attached to the main body 20 heats only a part of the main body 20. The main body 20 is sufficiently heated so that the temperature of the sample gas collected is 150 ° C or higher or 180 ° C or higher. There was a problem that accurate measurement was not possible until it could be maintained. In addition, in the case of the sampler for collecting the halogen group gas, the temperature of the sample gas should be maintained at 180 ° C. or higher, so the temperature of the heater 40 had to be maintained at a high temperature of 200 ° C. or higher. As such, when a high temperature of over 200 ° C. is continuously supplied to the main body 20 of the exhaust gas sampler 10 used in the related art, the high temperature is supplied only to a portion adjacent to the heater 40, so that the heater is in operation. The part in contact with (40) is expanded mainly and contracts when not in operation. In addition, the fastening screws fastened to the flange 21 in front of the main body 20 also concentrate on the fastening screws adjacent to the heater 40 while the sample gas is being collected so that the high heat of the heater 40 is supplied. As such, when the heating and cooling action is applied by the high temperature of the heater 40, the fastening screws adjacent to the heater 40 are weakened in durability and are easily broken as compared to the fastening screws on the opposite side of the heater 40. There was this.

In addition, the exhaust gas sampler used in the prior art had a gas supply port 54 on the side of the main body 20, but the gas supply port 54 formed on the side of the main body 20 has a narrow width and length of the pipe line. Of course, the long one is formed in a bent form, so even if fine dust is wrapped inside the pipe, the fine dust is not easily removed even when strong compressed air is injected through the compressed air inlet 55 on the back side.

The present invention has been made in view of the above, the exhaust gas sampler according to the present invention is installed on the chimney from which the exhaust gas is discharged, and is applied to the measuring device by the ion electrode method and the measuring device by the infrared absorption method. Its purpose is to provide sample gas simultaneously.

In addition, the present invention improves the shape of the heater provided to the main body of the exhaust gas sampler so that the temperature of the sampled gas can be measured in a short time, as well as supplying heat evenly to the main body of the sampler Another purpose is to extend the useful life of the harvester.

Exhaust gas sampler according to the present invention for achieving the above object, the front surface is provided with a first flange to be attached to the chimney, the rear is a hollow body and the end is provided with a cylindrical portion is open, the It is coupled to the front surface of the main body so as to protrude inside the chimney, the lower portion is formed with a gas collecting port for collecting the exhaust gas, the first filter is attached to the outside to block the fine dust flow into the gas collecting port A gas collecting tube, attached to the outside of the cylindrical portion, a heater for supplying heat to the exhaust gas collected through the gas collecting tube and inserted into the inside of the cylindrical portion, remaining in the exhaust gas collected through the gas collecting tube The second filter is provided to block the fine dust is introduced, and for supplying the collected exhaust gas to each measuring device A distribution pipe having a number of gas supply ports and a compressed air inlet port through which compressed air is introduced for cleaning the first filter and the second filter, the gas supply port and the compressed air of the cylindrical part of the main body and the distribution pipe; The inflow is characterized in that it is formed in parallel.

In addition, the plurality of gas supply ports provided in the distribution pipe is characterized by consisting of the gas supply port for supplying the sample gas to the measuring device by the ion electrode method and the gas supply port for supplying the sample gas to the measuring device by the infrared absorption method. .

In addition, the cylindrical portion of the main body and the gas supply port and the compressed air inlet of the distribution pipe is characterized in that formed in parallel.

In addition, the heater is attached to surround the outside of the cylindrical portion is characterized in that the band heater capable of uniformly heating the cylindrical portion.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the exhaust gas sampler according to the present invention.

Referring to Figure 2, the exhaust gas sampler 100 according to the present invention is a main body 200 is attached to the chimney, gas collection pipe 300 is installed to protrude in front of the main body 200, gas collection pipe ( It is composed of a heater 400 for maintaining a constant temperature of the sample gas collected from 300 and the distribution pipe 500 for supplying the sample gas to each measuring device.

Referring to Figure 3, the exhaust gas sampler 100 according to the present invention configured as described above is a gas collection pipe 300 is coupled to the front surface of the main body 200 is provided with a cylindrical portion 230, the main body 200 Inside the cylindrical portion 230 is a second filter 510 having a distribution pipe 500 installed on the front is inserted. At this time, the main body 200 and the distribution pipe 500 are coupled by the flanges 240 and 530 provided to face each other, and the gasket 610 so that outside air does not flow between the flanges 240 and 530. This is inserted and then combined. The heater 400 may be a conventional rod-shaped heater, but the cylindrical portion of the body 200 may be used for rapid heating of the cylindrical portion 230 and durability of the fastening means for fastening the main body 200 and each component. It is preferable to use a band heater which can heat 230) evenly. The band heater may use a fastening hole 410 is formed on one side as shown, or use a band heater of another type.

In addition, the gas collection pipe 300, the path of the sample gas is moved, the cylindrical portion 230 of the main body 200 and the gas inlet hole 560 of the distribution pipe 500 and two gas supply ports (541, 542) Will be horizontal.

3 and 4, the main body 200 has a first flange 210 formed on the front surface of the main body 200 to be easily attached to the chimney, and the fastening hole 211 is formed radially on the first flange 210. It can be attached to the chimney by fastening means such as screws. In the center of the first flange 210, a predetermined portion protrudes, and in the center of the protruding portion, the gas collection pipe insertion hole 220 into which the gas collection pipe 300 is inserted is formed. The rear side is provided with a cylindrical portion 230 which protrudes in a cylindrical shape and has an open end. A second flange 240 is formed at an end of the cylindrical portion 230, and a fastening hole 241 is formed radially at the second flange 240.

5a and 5b, the gas collection pipe 300 is a hollow tube of a certain length, the bottom of the portion protruding into the chimney gas collection port so that the discharge gas in the chimney can be easily collected ( 310 is formed, the outside is provided with a first filter 320 to protect the gas collection port 310 so that fine dust except the exhaust gas flows into the gas collection port 310. The first filter 320 is fixed to the gas collection pipe 300 by a metal band 321. The gas collection pipe 300 is inserted into and fixed to the gas collection pipe insertion hole 220 formed on the front surface of the main body 200, and the fixed method is fixed or prevented by screwing (not shown). It can be fixed by the method.

Referring to FIG. 6, the heater 400 is attached to the outside of the cylindrical portion 230 of the main body 200, and may use a rod-shaped heater 40 (see FIG. 1) that has been conventionally used. Do. However, it is more preferable to use a band heater formed in a band type to wrap the outside of the cylindrical portion 230 for uniform heating of the cylindrical portion 230. The band heater has a fastening hole 410 is formed at both ends, is coupled to the fastening hole 410 by a fastening means such as a screw is fixed in close contact with the outer peripheral surface of the cylindrical portion (230). The heater 400 is fixed to the cylindrical portion 230 and then uniformly supplies heat to the cylindrical portion 230 in all directions.

2 and 7, the distribution pipe 500 has a flange 530 corresponding to the second flange 240 formed on the rear surface of the main body 200, and the flange 530 has a main body ( The fastening hole 531 corresponding to the fastening hole 241 formed in the second flange 240 of the 200 is formed, and is coupled by the fastening means such as the main body 200 and the screw. The filter coupling rod 520 to which the second filter 510 is coupled protrudes from the flange 530 front body 200 side of the distribution pipe 500, and protrudes from the front surface of the filter coupling rod 520. At the end, a screw hole 521 is formed to which the filter fixing screw 522 is fastened. As the second filter 510 manufactured in a cylindrical shape is fastened to the filter coupling rod 520, the filter fixing screw 522 is inserted after the second filter 510 is inserted into the filter coupling rod 520. The second filter 510 is fixed by fastening to the hole 521.

The distribution pipe 500 formed as described above has a plurality of gas inlet holes 560 communicated with the gas collection port 310 of the gas collection rod 300 on the side of the filter coupling rod 520. In addition, at the lower end of the flange 530 opposite to the rear main body 200 side, a gas supply port 541 for supplying a sample gas to a measuring device for measuring a halogen group gas by an ion electrode method and combustion gas by an infrared absorption method. A gas supply port 542 is formed to supply a sample gas to a measuring device for measuring the component of the component. The foreign material of the second filter 510 is reversed at the upper end of the rear surface of the flange 530 at the time of sampling. The compressed air inlet 550 for injecting is formed. At this time, the two gas supply holes (541, 542) and the compressed air inlet 550 is formed radially the same at the center of the rear surface of the flange 530, the gas inlet hole 560 formed in the filter coupling rod 520 It is supposed to communicate with.

Hereinafter, the operation of the exhaust gas sampler 100 according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

Referring to FIG. 8, the discharge gas D discharged from the chimney is introduced through the gas collection port 310 formed at the lower end of the gas collection pipe 300. At this time, the inflow of fine dust is blocked by the first filter 320 fixed to the gas collection port 310, and only pure exhaust gas is introduced into the main body 200. The sample gas of the introduced exhaust gas is heated by the heater 400 attached to the outside of the cylindrical portion 230 of the main body 200 and is maintained at a temperature of 180 ° C. or higher, which is a temperature determined by the 'environmental notice'. At this time, the band heater, which is the heater 400 used, heats the cylindrical portion 230 of the main body 200 in all directions, so that the inside of the cylindrical portion 230 does not have to maintain a high temperature as compared with a conventional rod-shaped heater. It can be maintained above 180 ℃.

The sample gas heated after being collected as described above is in contact with the second filter 510 of the distribution pipe 500 inserted and fixed inside the cylindrical portion 230. The second filter 510 of the distribution pipe 500 again filters the fine dust introduced while passing through the first filter 320 provided in the gas collection pipe 300, and the residue contained in the sample gas. It is to remove water.

Sample gas passing through the second filter 510 of the distribution pipe 500 is introduced into the gas inlet hole 560 formed in the filter coupling rod 520, the introduced sample gas is a gas supply port connected to each measuring device 541 and 542 to be moved to the measuring device.

9, the exhaust gas sampler 100 according to the present invention operated as described above is used for a predetermined time, the first filter 320 of the gas collection pipe 300 and the second of the distribution pipe 500 A large amount of fine dust adheres to the surface of the filter 510, and as a result, the performance of the filter is degraded, so that the sample gas cannot be collected smoothly. At this time, the operation of the heater 400 is cut off to stop the operation, and the compressed air is supplied from the outside through the compressed air inlet 550 formed on the rear surface of the distribution pipe 500 to supply the second filter of the distribution pipe 500. 510 and the fine dust adhered to the first filter 320 of the gas collecting pipe 300 are separated from the filter surface. As such, since the filters 320 and 510 are cleaned, the service life of the filters 320 and 510 may be extended.

As described above, the exhaust gas sampler according to the present invention can collect the sample gas using a single sampler, which has been conventionally attached to the chimney according to a measuring method, thereby reducing the installation cost and the chimney. Emissions from the gas are minimized.

In addition, the movement path of the collected sample gas is located in a straight line, so that the sample gas can be quickly supplied to each measuring device.

In addition, by replacing the heater attached to the main body with a band-type heater from the conventional rod-shaped heater, it is possible to raise the temperature of the main body uniformly and quickly, and also to prevent the temperature from rising sharply on only a part of the main body. It is effective to extend the service life of the fastening means and the body.

Claims (4)

In the exhaust gas sampler installed in the chimney discharged gas, A main body 200 having a first flange 210 to be attached to the chimney on a front surface thereof, and a cylindrical portion 230 having a hollow inside thereof and having an open end thereof; It is coupled to the front surface of the main body 200 so as to protrude inside the chimney, the lower portion is formed with a gas collecting port 310 for collecting the discharge gas, the fine dust is introduced into the gas collecting port 310 A gas collecting pipe 300 to which the first filter 320 to be attached is attached to the outside; A heater 400 attached to the outside of the cylindrical portion 230 to supply heat to the exhaust gas collected through the gas collection pipe 300; And The second filter 510 is inserted into the cylindrical portion 230 and is provided to block inflow of fine dust remaining in the exhaust gas collected through the gas collection pipe 300. And a plurality of gas supply holes 540 for supplying the respective measuring devices to the measuring devices, and compressed air inlets 550 through which compressed air is introduced for cleaning the first filter 320 and the second filter 510. It includes; distribution pipe 500 Cylindrical portion 230 of the main body 200 and the gas supply port 540 and the compressed air inlet 550 of the distribution pipe 500 is characterized in that the exhaust gas sampler, characterized in that formed in parallel. The method of claim 1, The plurality of gas supply holes 540 provided in the distribution pipe 500 may supply the sample gas to the gas supply port 541 for supplying the sample gas to the measuring device by the ion electrode method and the measuring device by the infrared absorption method. Exhaust gas sampler, characterized in that consisting of a gas supply port (542). delete The method of claim 1, The heater 400 is attached to surround the outside of the cylindrical portion 230, the exhaust gas sampler, characterized in that the band heater capable of uniformly heating the cylindrical portion (230).

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