JP6872153B2 - Wet unit - Google Patents

Description

The present invention relates to a wet unit, and more particularly to a wet unit that is arranged in front of a processing device such as a dust collecting device equipped with a dust collecting filter and removes high-temperature accompaniment from dust-containing air introduced into the processing device.

In the production line of a factory or the like, in order to improve the working environment, a dust collector that removes the accompanying substances such as dust from the dust-containing air containing the accompanying substances such as dust is used. For example, at the site where the welding work is performed, the accompanying matter is removed from the dust-containing air generated by the welding work by a dust collector equipped with a dust collecting filter.

Since the dust-containing air generated by the welding work contains high-temperature companions (high-temperature dust) such as spatter and fume, such high-temperature companions are sucked into the dust collector while maintaining a high temperature. , It may adhere to the dust collection filter inside the dust collector and cause a fire inside the dust collector.
Similarly, a fire may occur in the treatment of dust-containing air from another device that generates dust-containing air containing high-temperature companions, for example, a combustion furnace or a boiler.

In order to prevent such a fire, it is a device installed on the upstream side of a dust collector equipped with a dust collection filter, and water for collecting dust is stored inside and contains dust sucked on the surface of this water. A dust collector that collides with air and removes high-temperature companions is known (Patent Document 1).

JP-A-2009-09547

A dust collector equipped with a dust collection filter is arranged on the downstream side of such a dust collector. Therefore, when minute water droplets (mist) are generated when the dust-containing air collides with the water surface in the dust collector, the minute water droplets adhere to the dust collection filter of the dust collector arranged on the downstream side and collect dust. It increases the pressure loss in the filter. Therefore, there is a demand for a configuration that does not generate minute water droplets or does not send minute water droplets to the downstream side.

On the other hand, such a dust collector is a device that collides the dust-containing air with the water surface in the dust collector to collect the accompanying substances such as spatter. In order to improve the collection efficiency, the dust-containing air is collected. It is necessary to increase the collision speed with respect to the water surface. However, when the collision speed is increased, the impact due to the collision increases, so that the generation of minute water droplets increases at the time of collision, and there is a problem that the generated minute water droplets are easily carried to the downstream side.

That is, such a dust collector is required to have both high collection efficiency and a configuration that does not generate water droplets or send water droplets to the downstream side. However, it has been difficult to achieve both of these with the dust collectors and the like in the above patent documents.

The present invention has been made in view of such a point, and is a dust collector using trapped water having a configuration in which water droplets are not generated or water droplets are not sent to the downstream side while having high collection efficiency. Wet unit) is intended to be provided.

According to another preferred embodiment of the present invention
A wet unit that removes dust from dust-containing air.
The housing that makes up the internal space and
A trapping water accommodating portion located below the internal space and accommodating a liquid for capturing dust,
A tubular dust-containing air supply unit having a double-tube structure having a dust-containing air flow path formed between them and supplying the dust-containing air toward the trapped water accommodating unit.
A dust-containing air outlet formed at the lower end of the dust-containing air supply unit so as to face the trapped water accommodating portion and having a frame-like cross-sectional shape communicating with the dust-containing air flow path.
A ventilation opening that penetrates the wall of the dust-containing air supply unit and communicates between the inner space and the outer space of the tubular dust-containing air supply unit.
An air outlet provided in the housing and communicating with the internal space is provided.
Wet units are provided.

At the time of use, the dust-containing air introduced into the wet unit is sprayed onto the surface of the trapped water contained in the trapped water accommodating portion from the dust-containing air outlet having a frame-shaped cross-sectional shape and collides with the captured water. As a result, the contained companion is captured by the trapped water and becomes clean air. After collision with the captured water, clean air flows along the surface of the captured water.

In such a configuration, since the cross-sectional shape of the dust-containing air outlet is frame-shaped and the dust-containing air supply portion is tubular, the clean air that collides with the trapped water and the accompanying matter is removed is tubular. The dust-containing air supply unit flows separately in both the radial outer direction and the radial inner direction. Then, the clean air that has flowed in the radial inward direction flows into the space inside the tubular dust-containing air supply unit.

In the present specification, the radial inward direction means the direction from the outer edge of the rectangle to the central axis of the rectangle in addition to the inward direction in the radial direction in the circular shape. Similarly, in the present specification, the radial outer direction means the direction from the central axis of the rectangle to the outer edge of the rectangle in the rectangular shape, in addition to the radial outer direction in the circular shape.

As a result, the flow velocity of the clean air is reduced, the clean air is suppressed from rippling the water surface to generate water droplets, and the generated water droplets are less likely to be accompanied, as compared with the configuration in which the clean air flows only in a single direction. .. Therefore, even if the collision speed of the dust-containing air with the captured water is increased in order to improve the collection efficiency of the accompanying matter, it is suppressed that the water surface is ruffled to generate water droplets, and the generated water droplets accompany the clean air. It becomes difficult to be done. Therefore, it is possible to achieve both high collection efficiency and a configuration in which water droplets are not generated or water droplets are not sent to the downstream side.

According to another preferred embodiment of the present invention
The dust-containing air supply unit has a cylindrical shape and has a cylindrical shape.
The frame-shaped dust-containing air outlet has an annular cross-sectional shape.

According to such a configuration
Since the dust-containing air supply unit has a cylindrical shape, the air flow in the dust-containing air supply unit is not biased, and it is possible to suppress the adhesion of dust to the side wall of the dust-containing air supply unit.

According to another preferred embodiment of the present invention
The dust-containing air supply unit has a prismatic shape and has a prismatic shape.
The dust-containing air outlet has a rectangular frame-shaped cross-sectional shape.

When the housing of the wet unit is box-shaped, the shape of the trapped water accommodating portion provided at the lower position, that is, the surface of the trapped water is generally rectangular. In such a case, if the dust-containing air outlet has a rectangular frame-shaped cross-sectional shape, the effective area with respect to the liquid surface can be maximized, and as a result, the wet unit can be designed to be small.

According to another preferred embodiment of the present invention
The vent opening comprises two openings
The two openings are formed at positions facing each other in the radial direction of the tubular dust-containing air supply unit.

According to such a configuration, after the collision with the captured water, the clean air flows in the radial inward direction of the tubular dust-containing air supply unit, and further flows into the space inside the tubular dust-containing air supply unit. Can be efficiently sent out to the internal space of the housing.

According to another preferred embodiment of the present invention
The air outlet is oriented so as to point in the same direction as one of the ventilation openings.

According to such a configuration, the clean air that has flowed into the space inside the tubular dust-containing air supply unit through the opening can be efficiently sent out to the outside of the housing.

According to the present invention, there is provided a dust collector (wet unit) using trapped water having a configuration in which water droplets are not generated or water droplets are not sent to the downstream side while having high collection efficiency.

It is a perspective view which shows the appearance of the wet unit of 1st Embodiment. It is sectional drawing along the line II-II of FIG. It is sectional drawing along the line III-III of FIG. It is sectional drawing along the IV-IV line of FIG. It is a perspective view which shows the appearance of the wet unit of 2nd Embodiment. It is sectional drawing along the VI-VI line of FIG. FIG. 5 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 5 is a cross-sectional view taken along the line IIX-IIX of FIG.

Hereinafter, the wet unit 10 of the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of the wet unit 10. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. is there.

The wet unit 10 is a dust collector arranged in front of the dust collector in order to remove high-temperature dust and the like from the dust-containing air introduced into the dust collector.
Specifically, the wet unit 10 is provided with a dust collecting filter and is arranged in front of a dust collector used for removing dust at a site where high-temperature dust is generated, such as a welding operation, and is used as a dust collecting filter for the dust collector. Dust-containing air introduced This is a dust collector used to remove high-temperature dust from the dust-containing air and prevent the occurrence of a fire in the dust collector.

As shown in FIG. 1, the wet unit 10 includes a box-shaped housing 12. The housing 12 includes an introduction port 14 for dust-containing air formed on the upper surface and an air outlet 16 for clean air formed on the side surface. Further, as shown in FIGS. 2 to 4, the housing 12 is provided with an internal space 18 inside, and the introduction port 14 for dust-containing air and the air outlet 16 for clean air are the internal space 18. Communicating.

In the wet unit 10, a trapped water accommodating portion 20 for accommodating a liquid for capturing dust (“captured water W” in this embodiment) is formed at a position below the internal space 18. The trapped water accommodating portion 20 has a “dustpan” shape for taking out dust that has been trapped by the trapped water W accommodated in the trapped water accommodating portion 20 and is settled or suspended in the trapped water W to the outside of the wet unit 10. The sludge box 22 is detachably arranged. The bottom surface 22a of the sludge box 22 is formed of punching metal so that dust in the trapped water W can be separated from the trapped water W while being filtered out.

The liquid contained in the trapped water accommodating portion 20 is not limited to the captured water W of the present embodiment, that is, water, but is ionic liquid (water that does not evaporate) and water mixed with a flocculant that agglomerates the collected dust. , A liquid having a specific function such as a dissolving liquid capable of dissolving the collected dust, an antifreezing liquid, and a liquid having a deodorizing function can be appropriately selected.

The wet unit 20 further includes a tubular dust-containing air supply unit 24 that supplies dust-containing air introduced from the outside through the introduction port 14 toward the trapped water accommodating unit. In the dust-containing air supply unit 24, two square columnar pipes having different outer diameters, that is, the inner pipe 26 and the outer pipe 28 are arranged coaxially, and the dust-containing air supply unit 24 has a frame shape between the inner pipe 26 and the outer pipe 28. It has a double pipe structure in which an air flow path 30 is formed.

Further, as shown in FIGS. 2 and 3, the upper end of the inner tube 26 is closed by a quadrangular pyramid-shaped closing portion 26a. On the other hand, the outer tube 28 has an open end at the upper end and communicates with the introduction port 14.

Further, the lower ends of the inner pipe 26 and the outer pipe 28 are terminated at substantially the same height position, and the trapped water accommodating portion 20 (or the trapped water accommodating portion) is located between the lower end of the inner pipe 26 and the lower end of the outer pipe 28. A dust-containing air outlet 32 having a frame-shaped cross-sectional shape facing the captured water W) housed in 20 is formed. That is, the dust-containing air outlet 32 is formed at the lower end of the dust-containing air flow path 30 having a frame-shaped cross section.

The distance between the dust-containing air outlet 32 and the surface of the captured water is appropriately set according to various conditions such as the size of the wet unit.

Furthermore, a ventilation opening 34 penetrating the side wall of the dust-containing air supply unit 24, specifically, the side wall of the inner pipe 26 and the outer pipe 28 is provided. The ventilation opening 34 is separated from the dust-containing air flow path 30 formed between the inner pipe 26 and the outer pipe 28 by a cylindrical inner peripheral wall 34', and is separated from the space inside the dust-containing air supply unit 24 and the outside. It communicates with the space.

In the wet unit of this embodiment, the ventilation opening 34 includes two openings 34a and 34b. The two openings 34a and 34b are formed so as to face each other in the radial direction of the tubular dust-containing air supply unit 24, that is, to face opposite sides of the tubular dust-containing air supply unit 24. ing. Further, one opening 34a is oriented so as to face the same direction as the air outlet 16 for clean air.

Dust-containing air generated at a welding site or the like is introduced into the introduction port 14 of the wet unit 10 by suction. The dust-containing air introduced into the internal space 18 of the housing 12 from the outside through the introduction port 14 is supplied to the upper part of the dust-containing air supply unit 24 (arrow A). Further, the dust-containing air is flowed by the closing portion 26a at the upper end of the inner pipe 26 toward the dust-containing air flow path 30 having a frame-like cross section formed between the inner pipe 26 and the outer pipe 28 (arrow B). .. Further, the dust-containing air flows toward the dust-containing air outlet 32 formed at the lower end of the dust-containing air flow path 30 (arrow C), and is directed from the dust-containing air outlet 32 toward the surface of the captured water (W). Is sprayed (arrow D). The dust-containing air blown toward the surface of the captured water (W) collides with the surface of the captured water (W), and the accompanying dust (accompanying matter) is captured by the captured water and the amount of dust contained. Becomes clean air with reduced. At this time, high temperature dust is also removed.

After the collision with the trapped water (W), the clean air flows along the surface of the trapped water. In the wet unit 10 of the present embodiment, since the cross-sectional shape of the dust-containing air outlet 32 is frame-shaped and the dust-containing air supply unit 24 is tubular, it collides with the trapped water (W) and the accompanying matter is removed. The clean air is separated into two in the radial outer direction (arrow E) and the radial inner direction (arrow F) of the tubular dust-containing air supply unit 24.

The clean air flowing in the radial inward direction (arrow F) flows into the space inside the tubular dust-containing air supply unit 24, and further flows upward in the space inside the inner pipe 26 (arrow G). .. The clean air that has flowed upward through the space inside the inner pipe 26 passes through the ventilation opening 34 (opening 34a or 34b) provided on the side wall of the dust-containing air supply unit 24 (arrow H), and is dust-containing air. It flows out to the internal space 18, which is the space outside the supply unit 24.

Then, in the wet unit of the present embodiment, the clean air that has flowed in the radial outer direction of the tubular dust-containing air supply unit and the clean air that has flowed in the radial inward direction of the tubular dust-containing air supply unit 24, and further dust-containing. The clean air flowing out to the space outside the dust-containing air supply unit 24 through the ventilation opening 34 of the air supply unit 24 is discharged to the outside of the wet unit 10 through the air outlet 16 which is the outlet of the clean air (arrow I). , Introduced into equipment connected to the downstream side, such as a dust collector.

As described above, in the wet unit 10 of the present embodiment, two clean airs are sprayed from the dust-containing air outlet 32 toward the surface of the captured water (W) and collide with the surface of the captured water (W). Since the flow is divided into two, the flow velocity is lower than that of a configuration in which the flow is in only one direction. As a result, it is suppressed that the water surface is ruffled to generate water droplets, and the generated water droplets are less likely to be accompanied by clean air.

Next, the wet unit 40 of the second embodiment of the present invention will be described. The wet unit 40 of the second embodiment has the first embodiment except that the shape of the dust-containing air supply unit 42 is different from the shape of the dust-containing air supply unit 24 of the wet unit 10 of the first embodiment. It has the same configuration as the wet unit 10 of the above.

Therefore, regarding the wet unit 40 of the second embodiment, the members common to the wet unit 10 of the first embodiment are designated by the same reference numerals and the description thereof will be omitted, and only the parts different from the wet unit 10 will be described. To do.

FIG. 5 is a perspective view showing the appearance of the wet unit 40. 6 is a cross-sectional view taken along line VI-VI of FIG. 5, FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5, and FIG. 8 is a cross-sectional view taken along line IIX-IIX of FIG. is there.

In the wet unit 10 of the first embodiment, the dust-containing air supply unit 24 has a double-tube structure in which two square columns having different thicknesses are stacked, but the dust-containing air of the present embodiment. The supply unit 42 has a double pipe structure in which two cylindrical pipes 44 and 46 having different diameters are concentrically arranged. Due to the difference in the cross-sectional shape of the pipe, in the wet unit 40 of the second embodiment, the cross-sectional shape of the dust-containing air outlet 48 is annular.

The wet unit 40 of the second embodiment having such a configuration also has the same effect as that of the first wet unit 10.

Not limited to the above-described embodiment of the present invention, various modifications and modifications can be made within the scope of the technical idea described in the claims.

10: Wet unit 12: Housing 14: Introduction port 16: Air outlet 18: Internal space 20: Captured water storage part 22: Sludge box 24: Dust-containing air supply part 26: Inner pipe 28: Outer pipe 30: Dust-containing air Flow path 32: Dust-containing air outlet 34: Ventilation opening

Claims (4)

A wet unit that removes dust from dust-containing air.
The housing that makes up the internal space and
A trapping water accommodating portion located below the internal space and accommodating a liquid for capturing dust,
A tubular dust-containing air supply unit having a double-tube structure having a dust-containing air flow path formed between them and supplying the dust-containing air toward the trapped water accommodating unit.
A dust-containing air outlet formed at the lower end of the dust-containing air supply unit so as to face the trapped water accommodating portion and having a frame-like cross-sectional shape communicating with the dust-containing air flow path.
A ventilation opening that penetrates the wall of the dust-containing air supply unit and communicates between the inner space and the outer space of the tubular dust-containing air supply unit.
An air outlet provided in the housing and communicating with the internal space is provided .
The vent opening comprises two openings
The two openings are formed at positions facing each other in the radial direction of the tubular dust-containing air supply unit.
Wet unit characterized by that. The dust-containing air supply unit has a cylindrical shape and has a cylindrical shape.
The dust-containing air outlet has an annular cross-sectional shape.
The wet unit according to claim 1. The dust-containing air supply unit has a prismatic shape and has a prismatic shape.
The dust-containing air outlet has a rectangular frame-shaped cross-sectional shape.
The wet unit according to claim 1. The air outlet is oriented so as to point in the same direction as one of the ventilation openings.
The wet unit according to claim 1.

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