JPH10115582A - Collection apparatus for sulfur-based gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a collection apparatus by which the collection amount of a gas is evaluated precisely. SOLUTION: A collection apparatus, for a sulfur-based gas, is provided with a sample part 2 and with a drive part 3 which moves a stage 4. The sample part 2 is constituted of the stage 4, of a silver material 5 which is fixed onto the stage 4 and of a cover 6 which covers the stage 4 and the silver material 5 and in which a long hole 6a is made. Ends 7a, on one side, of one pair of films 7 are attached to the rear of the cover 6 in such a way that respective ends 7b on the other side are situated so as to be faced at both ends of a gas collection part 5a at the silver material 5. The ends 7b, 7b, on the other side, of the films 7, 7 are brought into close contact with the surface of the silver material 5 by their own weight. The width D of the long hole 6a is formed to be smaller than the interval (d) between the respective ends 7b, 7b on the other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sulfur-based gas collecting apparatus for evaluating the amount of corrosion caused by sulfur-based gases such as hydrogen sulfide (H2S) and carbonyl sulfide (COS) in the atmospheric environment.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional sulfur-based gas trapping apparatus, which will be described with reference to FIG. The sulfur-based gas trapping device generally denoted by reference numeral 1 includes a sample unit 2 and a driving unit 3 that moves a stage 4 described below. Sample part 2
Is composed of a stage 4, a flat silver material 5 fixed on the stage 4, and a cover 6 that covers the stage 4 and the silver material 5 and has an elongated hole 6a.

In such a configuration, when the sulfur-based gas trapping device 1 is left in the atmosphere for a certain period of time, for example, one month, the sulfur-based gas 9 flowing into the cover 6 from the long hole 6a is removed.
Are collected by the gas collecting portion 5a of the silver material 5 and corrode the silver material 5. One month later, the driving unit 3 is driven to move the silver material 5 by a certain amount, and a new gas collecting unit of the silver material is covered 6.
The gas is collected for the next month by making it correspond to the long hole 6a.

[0004]

In the conventional sulfur-based gas trapping device 1 described above, when the cover 6 is fixed, the distance between the cover 6 and the silver material 5 can be kept constant by distortion or warpage of the cover 6. It was difficult. For this reason, when the space between the cover 6 and the silver material 5 is widened, the gas 9 flowing downward from the long hole 6a flows to the left and right, and the adjacent gas collecting portion is also corroded. It is difficult to evaluate.

That is, FIG. 5 shows the results of analysis of a silver material after gas collection by a conventional sulfur-based gas collection device. The analysis of sulfur is performed by electron beam micro analysis (line analysis).
This is a three-day inspection of fluctuations in sulfur-based gas concentration every day. The three arrows indicate the center of the sulfur-based gas collection unit 5a that collected the gas on each day,
The individual peak values 20a, 20a, 20a indicate the amount of gas collected on each day. In the figure, the waveform spreads from the peak value 20a toward the valley portion 20b, and the adjacent portions overlap in the valley portion 20b, and it can be seen that the gas is flowing to the adjacent gas collecting portion. There is a problem that it is difficult to accurately evaluate the amount of collected gas.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a sulfur-based gas collecting apparatus capable of accurately evaluating the amount of collected gas. .

[0007]

In order to achieve this object, a sulfur-based gas collecting apparatus according to the present invention comprises a silver material in which a gas collecting portion for collecting a sulfur-based gas is formed; A sample section comprising a cover in which holes are perforated at positions corresponding to the stage and the silver material, and a driving section for moving the stage. In the sulfur-based gas trapping device, a pair of lamella members having fixed ends attached to the back surface of the cover are provided so that their free ends are located opposite to both ends of the gas trapping portion of the silver material, and The free end is slidably contacted with the silver material. Therefore, the gas flowing from the hole of the cover is prevented from spreading to the adjacent gas collecting portion by the opposing free ends of the pair of thin plate members.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a sulfur-based gas trapping device according to the present invention, wherein (a) is a plan view and (b) is a cross-sectional view.
In this figure, the same or equivalent members as those of the related art described with reference to FIG. 4 described above are denoted by the same reference numerals, and detailed description thereof will be omitted. The feature of the present invention resides in that a pair of flexible flaky films 7 are provided between the silver material 5 and the cover 6.

That is, the fixed ends 7a, 7a are arranged such that the free ends 7b, 7b of the pair of films 7, 7 face each other at both ends of the gas collecting portion 5a of the silver material 5.
Are attached to the back surface of the cover 6. Film 7,7
The free ends 7b, 7b are closely contacted with the surface of the silver material 5 by their own weight, so that the free ends 7b, 7b can slide on the silver material 5 when the stage 4 is moved by the driving device 3. Have been. The distance d between the free ends 7b, 7b of the films 7, 7 is formed to be smaller than the width D of the long hole 6a. In the present embodiment, a commercially available OHP film sheet is used as the film 7, and the fixed end 7 a is attached to the back surface of the cover 6 with a tape. In the present embodiment, the free end 7b of the film 7 is configured to be in close contact with the surface of the silver material 5 by its own weight. However, the film 7 is formed of a flaky elastic member and brought into close contact by its elastic deformation. You may do so.

With such a configuration, the elongated hole 6
The gas 9 flowing from a is adsorbed by the gas collecting portion 5a and is prevented from expanding right and left by the free ends 7b and 7b of the film 7, so that the gas 9 does not expand beyond the size of the gas collecting portion 5a. Therefore, the gas 9 is not adsorbed by the adjacent gas collecting unit. The distance d between the free ends 7b, 7b of the films 7, 7 is the width D of the long hole 6a.
Due to the smaller size, the gas flowing from the long hole 6a is uniformly and uniformly adsorbed to the entire gas collecting portion 5a without shortage.

When it is desired to change the size of the gas collecting portion 5a, one end 7a of the film 7 is removed from the back surface of the cover 6 and the distance d between the other ends 7b, 7b is changed. it can. In this case, since the distance d between the free ends 7b, 7b is formed smaller than the width D of the long hole 6a, even if the size of the gas collecting part 5a is slightly increased, the gas collecting part 5a is formed. Is not positioned out of the long hole 6a of the cover 6 in plan view. Therefore, the gas flowing from the long hole 6a is uniformly and uniformly adsorbed to the entire gas collecting portion 5a without shortage.

FIG. 2 shows that the sulfur-based gas trapping device of the present invention is similar to the conventional sulfur-based gas trapping device described above.
The daily fluctuation in sulfur-based gas concentration was measured for three days. As is apparent from the figure, the waveform does not spread right and left from the peak value 15a toward the valley portion 15b, and the adjacent portions in the valley portion 15b do not overlap, and the gas flows to the adjacent gas collecting portion. You can see that it has not spread. For this reason, it is possible to accurately evaluate the amount of collected gas based on the peak value 15a.

In FIG. 3, the horizontal axis represents the distance from the center of the sulfur-based gas collecting portion, and the vertical axis represents the X of sulfur obtained by electron microanalysis.
It shows the relationship with the line intensity. In the figure,
Indicates that the distance between the silver material 5 and the cover 6 is 1 mm and the film is not placed on the silver material 5 as in the conventional case. When the film is not placed on the silver material 5 as described above, ◇ indicates that the distance between the silver material 5 and the cover 6 is 1 mm, and the film 7 of the present invention is disposed at both ends of the sulfur-based gas collecting unit 5a. is there.

In FIG. 1, when the film 7 is arranged, even if the distance between the silver material 5 and the cover 6 is 1 mm,
The distance between the silver material 5 and the cover 6 when not arranged is 0.
Even when compared with 5 mm, it can be seen that there is a large difference in the amount of sulfur collected in the silver material 5 with one end of the collecting portion 5a as a boundary. Therefore, when the film 7 is arranged as in the present invention, it can be seen that the amount of corrosion by the sulfur-based gas can be accurately evaluated even when the distance between the silver material 5 and the cover 6 is not constant. Further, in the conventional sulfur-based gas collecting device, the interval between the collecting portions 5a was required to be 5 mm or more. However, as can be seen from FIG. 3, when the sulfur-based gas collecting device of the present invention is used, the interval is reduced to 1 mm. It can be reduced to 0.5 mm, and the size of the device can be reduced.

[0015]

As described above, according to the present invention, a pair of thin plate members each having a fixed end attached to the back surface of the cover are provided, and the free ends of these thin plate members are connected to both ends of the silver material gas collecting unit. The gas flowing from the hole of the cover can flow into the adjacent gas collecting portion by the free ends of the pair of thin members by slidably contacting the silver material so as to face each other. Since it is prevented, the amount of corrosion caused by the sulfur-based gas in the gas collecting section can be accurately evaluated.

Further, according to the present invention, the distance between the free ends of the pair of thin plate members is made smaller than the width of the hole of the cover, so that the gas flowing from the hole can be completely supplied to the gas collecting portion. Adsorbed evenly and uniformly. In addition, when changing the size of the gas collecting portion, conventionally, another cover having a different hole width was required. Since it can be performed by changing the interval, it is economically efficient and efficient.

[Brief description of the drawings]

FIG. 1 shows a sulfur-based gas trapping device according to the present invention,
(A) is a plan view and (b) is a cross-sectional view.

FIG. 2 is a diagram showing an analysis result of a silver material after gas collection by a sulfur-based gas collection device according to the present invention.

FIG. 3 is a diagram comparing the X-ray intensity of sulfur with respect to the distance from the center of a sulfur-based gas collecting unit between the present invention and a conventional case.

4A and 4B show a conventional sulfur-based gas trapping device, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view.

FIG. 5 is a view showing an analysis result of a silver material after gas collection by a conventional sulfur-based gas collection device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sulfur-based gas collector, 2 ... Sample part, 3 ... Drive part, 4
... Stage, 5 ... Silver material, 5a ... Gas collecting part, 6 ... Cover, 6a ... Long hole, 7 ... Film, 9 ... Gas.

Claims (2)

[Claims] 1. A silver material on which a gas collecting portion for collecting a sulfur-based gas is formed, a stage on which the silver material is mounted, and a stage which covers the stage and the silver material and corresponds to the gas collecting portion for the silver material. In the sulfur-based gas trapping device including a sample portion formed of a cover having a hole at a position and a driving unit that moves the stage, each free end is at both ends of the gas collecting unit of the silver material. Providing a pair of lamella members having fixed ends attached to the back surface of the cover so as to face each other,
The sulfur-based gas collecting device, wherein the free end is slidably contacted with the silver material. 2. The sulfur-based gas trapping device according to claim 1, wherein the interval between the free ends of the pair of thin plate members is smaller than the width of the hole of the cover.