JP3061644U - Exhaust gas sampling device - Google Patents

Abstract

(57) [Problem] To prevent clogging of filter paper for dust filtration due to dust and coagulated water when collecting flue gas. SOLUTION: The exhaust gas at the time of collecting flue exhaust gas is passed through a cooling device to condense and remove moisture in the exhaust gas, thereby preventing the dust sampling filter paper from being clogged.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 In order to measure the components in the exhaust gas from the combustion equipment, the present invention continuously, accurately, and stably collects the exhaust gas to improve the technology of the exhaust gas sampling device for analyzing the components contained in the exhaust gas. About.

[0002]

[Prior art]

 Measuring the components in the flue gas is an essential condition for understanding the combustion state of the combustion equipment and protecting the environment. Components to be measured in the exhaust gas include oxygen, carbon monoxide, carbon dioxide, NOx, SOx, chlorine, hydrogen chloride, dioxins, dust, and the like.

[0003] In particular, in the case of dioxin exhaust gas sampling, the sampling time is 4 hours, and the temperature of the gas passing through the filter paper in the dust sampling section should be about 120 ° C (“Manual for Standard Measurement and Analysis of Dioxins”, Ministry of Health and Welfare, Ministry of Health and Welfare) Water supply environment department environment facilities section) is prescribed.

When the temperature of the exhaust gas is 120 ° C. or higher, the temperature of the exhaust gas is set to 120 ° C. or lower so that the exhaust gas passes through a cooling pipe through which water passes. In this case, the temperature of the exhaust gas decreases and the water in the exhaust gas condenses, and the condensed water seeps into the filter paper in which the dust is accumulated, eventually causing the filter paper to become clogged and reducing the gas suction amount due to an increase in pressure loss. Occurs. Whenever the amount of suction decreases, it is necessary to replace it with a new filter paper. If the pressure loss due to filter paper clogging increases and the amount of exhaust gas suction decreases, the amount of exhaust gas to be collected will be inaccurate if the number of replacements with new filter paper is large.

[0005]

[Problems to be solved by the invention]

 The present invention relates to an apparatus for reducing the number of replacements of filter paper for dust filtration in exhaust gas in order to continuously, accurately, and stably collect exhaust gas.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has the following configuration. (1) An exhaust gas sampling device characterized by installing a device that condenses and removes moisture contained in exhaust gas in a system that collects exhaust gas to measure components in exhaust gas containing dust and moisture. .

(2) The exhaust gas sampling device according to the above (1), wherein the device for condensing and removing the water can be cooled to condense the water in the exhaust gas. (3) The exhaust gas is exhaust gas from a flue, a chimney, or a duct in a combustion facility, and the exhaust gas collecting device according to the above (1), wherein a device for condensing and removing moisture is installed upstream of the filter paper holder for dust filter.

(4) The gas sampling apparatus according to (1) above, wherein the apparatus for condensing and removing the moisture is an apparatus cooled by air or filled with a liquid or a solid. In other words, a device that condenses and removes moisture contained in exhaust gas is installed upstream of the filter paper for dust filtration to condense and remove moisture contained in exhaust gas, and dust is accumulated on the filter paper for dust filtration. Therefore, wetting by the moisture contained in the exhaust gas and water condensation are prevented, and clogging of the filter paper is prevented.

By eliminating clogging of the filter paper and reducing the number of times of replacement with new filter paper, exhaust gas can be continuously, accurately and stably collected. The device that coagulates and removes moisture contained in the exhaust gas must be a device that can cool the exhaust gas with ice, an electronic cooler, or the like.

A specific example of an apparatus for coagulating and removing water contained in exhaust gas is an “absorption bottle” or a “safety bottle” (Analytical Chemistry [1] on page 30) This device is installed in a cooling tank cooled with ice or an electronic cooler. The flow direction of the exhaust gas is the same as in FIGS.

Although the absorption bottle may be empty, it is preferable to fill it with an organic cooling medium such as water or methyl alcohol or a solid cooling medium such as glass wool. The cooling temperature is 30 ° C or less, preferably 10 ° C to 0 ° C. Condensed water can be extracted by installing a side pipe with a cock that leads to the inside of the “absorption bottle” or “safety bottle”.

[0012]

[Embodiment of the invention]

 Embodiments will be described with reference to the drawings. FIG. 1 is an explanatory view of one example, in which gas flows in a flue 1 in a direction indicated by an arrow. A gas sampling pipe 2 is opened in the middle of the flue to collect flue gas. Numeral 3 denotes a cooling probe, in which cooling water is supplied from an inlet 4 and discharged from an outlet 5 to cool the cooling probe 3. 6 is an absorption bottle, which is immersed in a bath 7 containing ice water. Exhaust gas that has passed through the cooling probe 3 passes through the absorption bottle 6 and is transferred to the exhaust gas sampling device A via the dust filtration unit 8. Table 1 shows Examples and Reference Examples when the exhaust gas sampling time was 4 hours.

[0013]

[Table 1]

In the case of the embodiment, it can be seen that the number of replacements of the filter paper is smaller than that of the reference example.

[0015]

[Effect of the invention]

 Prevent clogging of the filter paper and reduce the number of filter paper replacements by installing a cooling device upstream of the filter paper for dust filtration in the exhaust gas collection system to coagulate and remove the moisture contained in the exhaust gas. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an example of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flue 2 Gas sampling pipe 3 Cooling probe 4 Inlet 5 Outlet 6 Absorption bottle 7 Bath with ice water 8 Dust filtration unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Nakai 3-1-1176 Fukusaki, Minato-ku, Osaka-shi Inside Kansai Tec General Technology Center (72) Inventor Takeharu Utsumi 3-1-1 Fukusaki, Minato-ku, Osaka-shi 176 Kansai Tec General Technology Center (72) Inventor Koji Uzawa 3-1-1 Fukuzaki, Minato-ku, Osaka City 176 Kansai Tec General Technology Center

Claims (4)

[Utility model registration claims] An exhaust gas sampling apparatus characterized in that a device for condensing and removing moisture contained in exhaust gas is installed in an exhaust gas sampling system for measuring components in exhaust gas containing dust and moisture. . 2. The exhaust gas sampling apparatus according to claim 1, wherein the apparatus for condensing and removing the water is coolable to condense the water in the exhaust gas. 3. The exhaust gas is discharged from a flue, a chimney,
2. A device for condensing and removing moisture, which is exhaust gas from a duct, is installed upstream of the filter paper holder for dust filtration.
Exhaust gas sampling equipment. 4. The gas sampling apparatus according to claim 1, wherein the apparatus for condensing and removing the water is an apparatus cooled by air or filled with a liquid or a solid.