JPH10111396A - Filter for sodium aerosol removal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously treat a large amount of air containing sodium aerosol and enable sodium aerosol removal by disposing a metal mesh in a plurality of horizontal paths forming a multi-step bending path. SOLUTION: In casing 11 of a removal filter 10, a flow inlet 13 and an exhaust port 15 are provided on a lower side face and a ceiling part, respectively. Horizontal paths 27, 29, 31, 33, 35, and 37 are partitioned by baffle plates 17, 19, 21, 23, and 25, and a bending path are formed. A coarse metal mesh at the paths 27, 29, 31, and 33 of an upstream part of the bending path, a middle coarse metal mesh at the path 35 of the middle-stream part, and a fine metal mesh at the path 37 of the downstream part are disposed, respectively. When an air containing sodium aerosol is flown from the flow inlet 13, aerosol of relatively long diameter is caught at the paths 27, 29, 31, and 33, and middle- sized, fine aerosol is removed by the metal meshes of the paths 35 and 37, and air in which sodium aerosol is not contained is discharged from the exhaust port 15 into air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a filter for removing suspended impurities in a gas, and more particularly to a filter for capturing and removing sodium aerosol in air.

[0002]

2. Description of the Related Art Sodium melts at about 98.degree. C. to form liquid sodium. Liquid sodium has a good heat transfer characteristic and may be used as a heat carrier. Since liquid sodium has a high activity, if it leaks out of a pipe or a container through which it flows, it reacts with the elemental elements and contained substances of the air to produce a sodium aerosol. Conventional filters for removing such sodium aerosol use a fibrous filter material.
Further, a cold trap or the like using a metal mesh has been used to capture sodium vapor generated in a container or the like.

[0003]

However, the sodium aerosol removing apparatus using a fibrous filter material as described above originally handles a controlled amount of gas and has a small processing capacity. Further, the device that captures sodium vapor traps the vapor of sodium alone. However, sodium aerosol generated by leakage of liquid sodium is composed of a complex reaction product with moisture and carbon dioxide gas in the air, and continues to be generated until the leakage stops. There was a problem that it could not be completed. For this reason, in order to maintain the safety of the plant, measures have been taken to isolate the room inside the building that houses the equipment piping where the leakage of liquid sodium has occurred from the outside. There were concerns that problems would arise. Therefore,
An object of the present invention is to provide a sodium aerosol removal filter capable of continuously treating a large amount of air including a sodium aerosol to remove a sodium aerosol.

[0004]

In order to solve the above problems, according to the present invention, a filter for removing sodium aerosol has a casing having an inlet formed on a lower side and an outlet formed on a ceiling. A plurality of horizontal passages formed in multiple stages in the casing and connected to each other to form a bent passage; a coarse metal mesh provided in a horizontal passage twine positioned upstream of the bent passage; a midstream portion of the bent passage; And a fine metal mesh provided in the horizontal passage downstream of the bent passage.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Referring to FIG. 1, a box-shaped casing 11 of a removal filter 10 has an inlet 1 at a lower side surface.
3 while the outlet 15 is provided in the ceiling.
A baffle plate 1 extending in a horizontal direction is provided in a casing 11.
7, 19, 21, 23, 25 are provided at intervals,
Horizontal passages 27, 29, 31, 33, 3 are located below each.
5 and a horizontal passage 3 above the baffle plate 25.
7 are defined. These horizontal passages 27, 29, 3
1, 33, 35 and 37 are connected at the horizontal end, and form a bent path of the sodium aerosol-containing gas as a whole. In the horizontal passages 27, 29, 31, 33 located generally upstream of the bent passage, metal mesh members 41 having relatively large slits or openings are spaced apart from each other as shown in FIGS. It is arranged so that it may shift. As can be easily understood from FIG. 1, the distance between the metal mesh members 41 is smaller in the horizontal passages 29, 31, and 33 on the downstream side as compared with those on the upstream side. For example, the distance between the metal mesh members 41 in the horizontal passage 29 is smaller than that of the horizontal passage 27. 4 and 5 in the horizontal passage 35 in the middle part.
As shown in the figure, the intermediate metal mesh members 43 are arranged at intervals in the flow direction. Finally, a narrow metal mesh member 45 is arranged or filled in the horizontal passage 37 in the upstream portion, as shown in FIGS.

When air containing sodium aerosol flows from the inflow port 13 of the removal filter 10 having the above-described configuration, the air passes through the horizontal passages 27, 29, and 3 which form a curved passage.
1, 33, 35, and 37, and a relatively large-diameter sodium aerosol flows through the horizontal passages 27 and 2 at this time.
9, 31 and 33 are captured by the metal mesh member 41,
The medium sized sodium aerosol is supplied to the horizontal passage 35
The fine sodium aerosol captured by the metal mesh member 43 inside the
The air which is removed and does not contain sodium aerosol is discharged from the outlet 15 into the atmosphere.

[0007]

As described above, according to the present invention,
As the gas containing sodium aerosol flows through the curved passage in the casing, the sodium aerosol is captured by the metal mesh in the horizontal passage in order of the particle size, so that the passage is not clogged due to local capture, so that a large amount of gas is generated. The gas can be processed continuously and for a long time.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing the entire structure of an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a plan sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a partially enlarged view of another part of FIG. 1;

FIG. 5 is a vertical sectional view taken along line VV of FIG. 4;

FIG. 6 is a partially enlarged view of still another part of FIG. 1;

FIG. 7 is a plan sectional view taken along the line VII-VII of FIG. 6;

[Explanation of symbols]

 Reference Signs List 10 removal filter 11 casing 13 inflow port 15 discharge port 17, 19, 21, 23, 25 baffle plate 27, 29, 31, 33, 35, 37 horizontal passage 41, 43, 45 metal mesh member

Claims (1)

[Claims] 1. A casing having an inlet formed on a lower side surface and an outlet formed on a ceiling, a plurality of horizontal passages formed in the casing in multiple stages and connected to each other to form a bent passage, and the bent passage. The coarse metal mesh provided in the horizontal passage located on the upstream side of the middle passage metal mesh provided in the horizontal passage in the middle part of the bent passage and the horizontal passage in the downstream part of the bent passage A filter for removing sodium aerosol, comprising a fine metal mesh provided.