JPH1052620A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector which sanitarily removes a large amount of dust such as ashes generated by an incinerator with saved power and labor and can recover fine particles almost completely. SOLUTION: This dust collector comprises a first dust collecting chamber 1 which recovers falling dust of comparatively heavier and diametrally larger particle size by supplying the air containing dust from above and circulating it through a cylindrical part, a thin water layer 4, a second dust collecting chamber 3 to which the upper part of the first dust collecting chamber 1 is connected at the lower part of the water layer 4 and a ring blower 6 which is connected to an upper chamber 3a above the water layer 4 of the second dust collecting chamber 3 and sucks and exhausts the air from the upper chamber 3a. The pressure of the upper chamber 3a is made negative by sucking the air from the upper chamber 3a of the second dust collecting chamber 3 with the help of the ring blower 6. Further, the effects of this negative pressure are brought to the first dust collecting chamber 1 side by breaking the water layer 4 to suck the air from outside. The dust of comparatively smaller particle diameter which is included into the air flowing into the second dust collecting chamber 3 is cleaned by a water droplet or a water bubble scattered in the upper chamber 3a when the air passes to the upper chamber 3a from the bottom of the water layer 4, and is recovered into the water layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting apparatus for sucking dust such as ash accumulated in an incinerator together with air and collecting the dust sucked with the air into a water layer in a dust collecting chamber.

[0002]

2. Description of the Related Art Conventionally, a large amount of ash is generated in an incinerator that burns paper waste, cardboard, wood and the like. If the ash accumulates, the amount of paper waste to be burned next in the incinerator will decrease, or the intake efficiency of the air will be impaired, and the combustion efficiency will decrease. There is a need.

In the incinerator ash cleaning work, a worker wearing a dustproof mask removes the ash by using a scoop or a broom to store the ash in a container such as a bucket or a bag. Or,
Since ash particles are easily scattered finely, water was sprayed on the ash so as not to fly up, and then the ash was stored in a container and removed. Further, ash has been removed by suction using a dust collector provided with a dry filter such as a vacuum cleaner.

[0004]

However, in the above-mentioned prior art, it is inefficient for the worker to manually remove and store the ash in the container, and the ash is completely removed because the ash falls off. I can't do it. Also, if you collect this after watering on the ash, it contains moisture,
The weight is heavy, and the burden on the operator is large. In addition, if ash is removed by suction using a dust collector equipped with a dry filter such as a vacuum cleaner, the fine particles of the ash particles will be discharged as white smoke together with the exhaust gas, and the surrounding environment will be reduced. In addition to contaminating
Since the filter was clogged and could not be used, it was difficult to collect a large amount of ash.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, perform sanitary labor-saving work for dust generated in large quantities such as ash in an incinerator, and almost completely recover fine powder. It is an object of the present invention to provide a possible dust collector.

[0006]

The present invention has the following means to achieve the above object. That is, the first dust collection chamber in which dust containing relatively large weight and particle size is dropped and collected by the air containing dust being supplied from above and swirling through the cylindrical portion, and a thin layer of water. A second dust-collecting chamber in which an upper portion of the first dust-collecting chamber is connected to a lower portion of the water layer, and a second dust-collecting chamber connected to an upper chamber above the water layer of the second dust-collecting chamber, Air suction and exhaust means for sucking and exhausting air in the upper chamber, wherein the air in the upper chamber of the second dust collection chamber is sucked by the air suction and exhaust means to form the upper chamber at a negative pressure, Accordingly, the water layer is destroyed, a negative pressure is applied to the first dust collection chamber side, air is sucked from the outside, and dust having a relatively small particle diameter mixed into the air that has entered the second dust collection chamber, When air passes from the bottom of the water layer to the upper chamber, water drops and water bubbles diffused into the upper chamber Is Kiyoshi, characterized in that it is recovered in the aqueous layer.

In the second dust collecting chamber, a water layer having a small thickness stored at the bottom thereof, an air flow path for guiding air from the bottom of the water layer to the upper chamber, Air flow path forming means for dispersing and forming the provided air flow path, and when the water layer is broken and water droplets and water bubbles are diffused into the upper chamber, the water droplets and water bubbles flow into the air flow path. It is desirable to have a cover plate for preventing entry.

[0008] Further, a metal plate perforated with holes dispersed on a surface at a predetermined pitch is used as the air flow path forming means,
The metal plate may be detachably provided in the water layer. Further, it is desirable that a handle serving as an indicator of the water level of the water layer is formed on the upper surface of the metal plate. Further, a dry filter may be attached to an exhaust port exhausted by the air suction and exhaust unit. Further, it is desirable that a drain pipe for guiding drainage, which is opened and closed by a valve, to the outside of the dust collection chamber is connected to the bottom of the water layer accommodated in the second dust collection chamber. Further, an opening / closing hole for eliminating clogging of a drain hole at the bottom of the water layer may be provided on an exterior of the second dust collection chamber. Further, a water level detection window for visually checking the water level in the water layer may be formed on the exterior of the second dust collection chamber.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing the overall configuration of the dust collecting apparatus, FIG. 2 is an exploded explanatory view showing the configuration of the second dust collecting chamber and the blower chamber, FIG. 3 is a perspective view showing the configuration of the first dust collecting chamber, and FIG. Is a perspective view of the metal plate, and a top view and a front view showing the configuration of the second dust collection chamber, FIG. 5 is a top view and a front view showing the configuration of the blower chamber, and FIG. 6 is a flow of air in the dust collector. FIG.

First, the overall configuration of the dust collector will be described with reference to FIGS. Reference numeral 1 denotes a first dust collection chamber, in which air containing dust is supplied from above through an air hose 2 and is swirled through a cylindrical portion, whereby dust having a relatively large weight and a large particle diameter falls and is collected. Is done. Reference numeral 3 denotes a second dust collecting chamber, in which a water layer 4 having a small thickness is provided, and an upper part of the first dust collecting chamber 1 is provided with a connecting hose 5 below the water layer 4.
Connected through.

Reference numeral 6 denotes a ring blower as an air suction / exhaust means, which is connected to the upper chamber 3a above the water layer 4 of the second dust collection chamber 3, and sucks and exhausts air in the upper chamber 3a. The ring blower 6 is housed in a blower chamber 7 provided below the second dust collection chamber 3. The air in the upper chamber 3a of the second dust collecting chamber 3 is sucked by the ring blower 6 to form the upper chamber 3a at a negative pressure, thereby destroying the water layer 4 and causing the first dust collecting chamber 1 to break. A negative pressure is applied to the second dust collecting chamber 3 to suck air from outside.
When the air that has entered the water layer 4 is sucked into the upper chamber 3a from the bottom of the water layer 4, the water droplets in the water layer 4 are dispersed into the upper chamber 3a, so that relatively small particle size dust mixed into the air is dispersed. Are washed and collected in the water layer 4 together with water droplets.

Reference numeral 8 denotes a dry filter, which is mounted on an exhaust port for exhausting air from the blower chamber 7. The dry filter 5 removes fine powder having relatively small particles contained in the air passing through the second dust collection chamber 3. In addition, the second
An upper drain pipe 10a opened and closed by a valve 9 is connected to the bottom of the water layer 4 formed in the dust collection chamber 3. The valve 9 is rotatably mounted from the outside by cutting out a part of the exterior of the blower chamber 7. The upper drain pipe 10a is connected to a lower drain pipe 10b provided in the blower chamber 7. The water in the water layer 4 is drained through a drain pipe 11 such as a vinyl hose attached to the outside of the apparatus through an upper drain pipe 10a and a lower drain pipe 10b when the valve 9 is opened.

An opening / closing hole 12 is provided on the exterior of the second dust collection chamber 3. By opening the opening / closing hole 12, a drain hole connected to the upper drain pipe 10 a to the water layer 4 is formed. By opening the vicinity, clogging of the drain hole can be eliminated.
A water level detection window 1 for visually checking the water level in the water layer 4 and the amount of collected dust is provided on the exterior of the second dust collection chamber 3.
3 are formed.

An upper cover 14 seals an upper opening of the second dust collecting chamber 3. The second dust collecting chamber 3 of the upper lid 14
A felt material, a soft rubber, or the like is adhered to the periphery of the upper chamber 3a, which is in contact with the upper edge of the opening. A handle 1 for gripping the upper cover 14 is provided on the upper surface of the upper cover 14.
4a are formed in two places. Reference numeral 16 denotes a handle, which is formed on the outer side surface of the second dust collection chamber 3 and is used when moving the dust collection device. In addition, wheels 17a, 17b, and 17c are rotatably attached to the dust collecting device at three places, and can be easily moved by gripping the handle 16 and pressing or pulling it. The wheel 17a is mounted so that its direction can be freely changed, and can be locked by a stopper.
Reference numerals b and 17c are attached to the apparatus main body in a fixed direction.

In FIG. 2, a power switch 20 is provided on the side of the blower chamber 7, and when the power switch 20 is turned on, the ring blower 6 operates. Further, the second dust collecting chamber 3 is mounted on the blower chamber 7, and the air pipes 3i and 3j, which are air flow paths, are connected, and the upper drain pipe 10a for drainage and the lower drain pipe 10b are connected. Then, both are screwed and integrally formed.

Next, regarding the configuration of each part of the above dust collector,
This will be described with reference to FIGS. First, the configuration of the first dust collection chamber 1 will be described with reference to FIG. 1st dust collection room 1
Has a cylindrical upper dust collecting chamber 1a and a lower dust collecting chamber 1b, the upper dust collecting chamber 1a has a suction port 1c and a discharge port 1d, and the lower dust collecting chamber 1b is a ash container. Things. Air is sucked in from the suction port 1c of the upper dust collecting chamber 1a, and is exhausted from a discharge port 1d provided at the center of the upper surface of the upper dust collecting chamber 1a.

An air hose 2 is connected to a suction port 1c of the first dust collection chamber 1. The opening 2a at the tip end of the air hose 2 is formed in a flat shape like a slit so as not to suck foreign matter or ash as a lump. The air sucked from the air hose 2 flows in from the suction port 1c while turning in a cyclone shape along the inner wall surface of the upper dust collecting chamber 1a. At this time, the relatively heavy ash particles are
It falls to the bottom of the lower dust collecting chamber 1b and is collected. Actually, most of the sucked ash is collected in the lower dust collecting chamber 1b, and only fine powder having a small particle diameter is exhausted from the outlet 1d, and is sucked into the second dust collecting chamber 3 through the connection hose 5. You.
A holder 1e for winding the connection hose 5 is welded around the upper dust collecting chamber 1a (see FIG. 1). It is desirable that a storage bag or the like be mounted in the lower dust collecting chamber 1b so that dust such as collected ash can be removed as it is.

Next, the configuration of the second dust collection chamber 3 will be described with reference to FIGS. FIG. 4B is a top view of a state where the cover plate shown in FIG. 4C is removed. FIG.
In (c), a water layer 4 having a small thickness stored in the bottom is provided at the bottom of the second dust collection chamber 3. The thickness of the water layer 4 is arbitrary, but is stored about 130 mm.
In the second dust collecting chamber 3, an air flow path for guiding air from the bottom of the water layer 4 to the upper chamber 3a is formed.
3c. The partition wall 3
The b and 3c are formed on the left and right sides of the second dust collection chamber 3 in the up-down direction, and form an air flow path. The partition wall 3b is a partition for guiding the air sucked from the suction port 3d to the bottom of the water layer 4, and the partition wall 3c guides the air passing from the water layer 4 to the upper chamber 3a to the blower chamber 7. It is formed as a partition for. A gap 3e through which air flows in is formed below the partition wall 3b, and a gap 3f through which air flows out is formed above the partition wall 3c.

As shown in FIG. 4B, a metal plate 18 is provided in the water layer 4 as an air flow path forming means. This metal plate 18 has a through hole 18a on one surface.
Are dispersed and air is dispersed and passed through the water layer 4 from the bottom toward the upper chamber 3a. Further, as shown in FIG. 4C, when the water layer 4 is broken and the water droplets and bubbles are dispersed in the room, the water droplets and water bubbles enter the air flow path in the upper chamber 3a. Is provided. A slit 3g is formed above the partition wall 3c, and the cover plate 19 is mounted on the slit 3g. The cover plate 19 prevents the water layer 4 from being broken and water droplets and water bubbles from rising when the upper chamber 3a is formed to have a negative pressure by sucking air, so that the upper layer 3a does not enter the air flow path beyond the partition wall 3c. It is provided in.

Further, L-shaped angles (or mounting flat steel) 3h are welded to the partition walls 3b and 3c in all directions.
A plurality of screw rods are erected on the L-shaped angle 3h. The metal rod 18 is placed on the L-shaped angle 3h by inserting an insertion hole 18b formed in the periphery of the metal plate 18 into the screw bar, and the butterfly nut (or hexagon nut) is inserted.
18c is screwed into a screw rod and fixed. As shown in FIG. 4 (a), handles 18d are formed on both sides of the upper surface of the metal plate 18 to improve the handleability when the metal plate 18 is detached from the screw bar. . Also,
This handle 18d is approximately 80m from the upper surface of the metal plate 18.
It has a height of m and is formed so as to substantially coincide with the upper limit of the water level of the water layer 4, and serves as a standard when water is poured into the second dust collection chamber 3.

As the metal plate 18, stainless steel having a thickness of about 1.5 mm is preferably used because it is lightweight and has corrosion resistance. As shown in FIG. 4 (a), the metal plate 18 has a through hole 18a having a diameter of 1.0 mm and a 7 mm pitch formed in a lattice pattern on one surface, thereby defining an air flow path. The diameter and the perforation pitch of the passage holes 18a are arbitrary, and a plurality of metal plates 18 having different diameters and perforation pitches of the passage holes 18a are prepared.
It may be replaced and used. Further, the metal plate 18 does not need to have a flat plate shape, and may have irregularities. The position in the height direction where the metal plate 18 is provided is arranged at a position of about 50 mm from the bottom of the water layer 4, but this can also be arbitrarily set according to the layer thickness of the water layer 4.

Here, the cleaning operation of the air sucked into the second dust collecting chamber 3 will be described with reference to FIG.
The air sucked from the suction port 3d descends through the air flow path partitioned by the partition wall 3b and enters from the water surface, and the gap 3
e and enters the bottom of the water layer 4. Then, while rising in the water layer 4 destroyed by the negative pressure of the upper chamber 3a and obstructing the flow path by the metal plate 18, the water passes through the through holes 18a which are dispersed and perforated on one surface, and Enter the room 3a. At this time, the water in the water layer 4 becomes water droplets and water bubbles and diffuses into the upper chamber 3a, and the water level rises to the position shown by the dashed line in FIG. Is blocked from entering the air flow path and falls. Dust such as ash contained in the air is collected in the water layer 4 and the upper chamber 3a.
The water is efficiently washed with water bubbles and water droplets diffused into the water layer, and falls along with the water droplets to be collected in the water layer 4. The ash collected in the water layer 4 is deposited on the upper surface of the metal plate 18 or on the bottom of the water layer 4. The air that has passed through the upper chamber 3a is sucked into the lower blower chamber 7 through the air passage partitioned by the partition wall 3c through the gap 3f. The negative pressure generated in the upper chamber 3a of the second dust collection chamber 3 affects the first dust collection chamber 1 side, and air is continuously sucked from the air hose 2.

The air that has entered the air flow path formed by the partition wall 3c passes through the bottom air pipe 3i, is led to the air pipe 3j of the blower chamber 7 shown in FIG. Is done. In FIG. 2, a water level detection window 13 for visually checking the water level in the water layer 4 is formed on the exterior of the second dust collection chamber 3. The amount of ash deposited on the water layer 4 and the metal plate 18 can be confirmed. In addition, the second
When draining the water in the water layer 4 to clean the inside of the dust collecting chamber 3, the valve 9 is opened and the drain pipe 11 is discharged from the drain through the upper drain pipe 10a and the lower drain pipe 10b connected thereto. Drain (see FIG. 1). When the drainage hole formed at the bottom of the water layer 4 is clogged, the opening / closing hole 12 is opened to remove ash accumulated in the drainage hole, thereby enabling cleaning.

Next, the configuration of the blower chamber 7 will be described with reference to FIGS. A blower chamber 7 is provided below the second dust collection chamber 3, and a ring blower 6 is accommodated in the blower chamber 7. The suction pipe of the ring blower 6 transfers the air passing through the water layer 4 to the air pipes 3i,
Aspirate via 3j. Further, air is sent out from the exhaust pipe of the ring blower 6 and guided to the dry filter 8 via the air pipe 3k to remove very small fine powder mixed in and exhausted to the outside.

As shown in FIG. 2, the dry filter 8 is formed by forming a bellows-shaped folded paper into a ring shape on a screw rod 8b erected on an exhaust pipe 8a connected to an air pipe 3k. Through the paper filter 8c, and the metal cylinder 8d having the upper end closed and the lower end opened is connected to the screw rod 8b.
After that, the nuts 8e are screwed together and positioned and fixed. Although the fine powder can be almost completely removed by the dry filter 8, the second dust collecting chamber 3
The dry filter 8 may be omitted as long as the fine powder can be removed only with the filter. In this case, it is possible to connect a flexible pipe instead of the filter 8 and attach it to an aqueous layer or the like.

Next, with reference to FIG. 6, the dust collecting operation of the dust collecting device constructed as described above will be described along the flow of the sucked air. When the tip opening 2a of the air hose 2 is brought close to the ash deposited in the incinerator (not shown), and the power switch 20 provided in the blower chamber 7 is turned on (see FIG. 2), the ring blower 6 is activated to activate the second blower. Air is sucked into the upper chamber 3a of the dust collecting chamber 3 to make a negative pressure, and the water layer 4 is broken to diffuse water droplets and water bubbles into the upper chamber 3a. The suction operation by the air hose 2 is started by exerting a negative pressure on the first dust collection chamber 1 side.

The ash sucked into the air hose 2 enters the upper dust collecting chamber 1a and swirls in a cyclone shape, while the ash having a large particle diameter or a relatively heavy ash is collected at the bottom of the lower dust collecting chamber 1b. The fine powder having a small particle size and relatively light weight dust are sucked into the suction hole 3d of the second dust collection chamber 3 through the connection hose 5 connected to the upper dust collection chamber 1a.

The air sucked into the second dust collecting chamber 3 is:
The water enters the water layer 4 stored below along the partition wall 3b through the gap 3e. Then, the water is sent upward from the bottom of the water layer 4 to the upper part, and the water is efficiently washed through the through holes 18a provided on one surface of the metal plate 18 and diffused into the upper chamber 3a. Most of the ash particles contained in the air are dissolved into the aqueous layer 4 and collected.

The air passing through the upper chamber 3a is sent downward through the air flow path partitioned by the partition wall 3c, and is sent to the ring blower 6 housed in the blower chamber 7 through the air pipes 3i and 3j. It is sucked. Then, the air sent out by the ring blower 6 is guided to the dry filter 8 through the air pipe 3k and the exhaust pipe 8a, the fine powder remaining in the air is collected, and the air is exhausted to the outside in a clean state. .

When removing the ash deposited on the bottom of the water layer 4 or the metal plate 18 or replacing the water in the water layer 4, first, the valve 9 is opened to drain water. At this time, if the drain hole at the bottom of the water layer 4 is clogged, the opening and closing hole 12 is opened to scrape out and remove ash. And the clamp 15
Is released and the upper lid 14 is removed, and the metal plate 18 in the water layer 4 is
After removing the ash, the ash deposited on the bottom can be cleaned while spraying water from the top of the opened second dust collection chamber 3.
The ash deposited in the first dust collection chamber 1 is deposited in the lower dust collection chamber 1.
It is only necessary to transport and discard every b, or if a storage bag is provided, take out and discard the bag.

According to the above structure, the air in the upper chamber 3a of the second dust collecting chamber 3 is sucked by the ring blower 6, so that the upper chamber 3a is formed at a negative pressure, thereby destroying the water layer 4. Then, a negative pressure is applied to the first dust collection chamber 1 side to suck air from outside, and the dust having a relatively small particle diameter mixed into the air that has entered the second dust collection chamber 3 is formed at the bottom of the water layer 4. When the water is sucked into the upper chamber 3a, the water is efficiently washed by water droplets and water bubbles diffused into the upper chamber 3a, and is collected in the water layer 4. Therefore, it is possible to perform the cleaning work of dust and the like in a hygienic manner and labor saving, and furthermore, the ash,
Even fine powder such as dust can be almost completely removed, thereby contributing to environmental conservation. In addition, since the number of parts is small and the configuration is simple as compared with an apparatus using a combination of dry and wet filters, manufacturing costs can be reduced, and maintenance for filter clogging is unnecessary.
Since it can be reused only by washing the inside of the dust collection chamber 3, it is easy to handle.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the shape of the metal plate 18, the size and pitch of the through-holes 18, and The layer thickness of the water layer 4 can be arbitrarily changed,
Needless to say, the dry filter 8 need not always be used, and it is needless to say that many more modifications can be made without departing from the spirit of the invention.

[0033]

As described above, according to the present invention, the air in the upper chamber of the second dust collection chamber is suctioned by the air suction / exhaust means to form the upper chamber at a negative pressure, thereby destroying the water layer. Then, a negative pressure is applied to the first dust collection chamber side to suck air from the outside, and dust having a relatively small particle diameter mixed into the air that has entered the second dust collection chamber from the first dust collection chamber is removed by the air. When the air passes from the bottom of the water layer to the upper chamber, it is efficiently washed by water droplets and water bubbles diffused into the upper chamber and collected in the water layer. Therefore, the cleaning work of dust and the like can be performed hygienically and labor-saving, and furthermore, fine powder such as ash and dust can be almost completely removed, which can also contribute to environmental conservation. In addition, since the number of parts is small and the configuration is simple as compared with an apparatus using a combination of a plurality of filters, the manufacturing cost can be reduced. Further, maintenance for filter clogging is not required. In this case, the reusability can be remarkably used, so that there is a remarkable effect such as good handling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire configuration of a dust collecting device.

FIG. 2 is an exploded explanatory view showing a configuration of a second dust collection chamber and a blower chamber.

FIG. 3 is a perspective view illustrating a configuration of a first dust collection chamber.

FIG. 4 is a perspective view of a metal plate and a top view and a front view showing a configuration of a second dust collection chamber.

FIG. 5 is a top view and a front view showing the configuration of the blower chamber.

FIG. 6 is an explanatory diagram showing a flow of air in the dust collector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st dust collection room 1a Upper dust collection room 1b Lower dust collection room 1c Inlet 1d Outlet 1e Holder 2 Air hose 3 Second dust collection room 3a Upper room 3b, 3c Partition wall 3d Suction port 3e, 3f Gap 3g Slit 3h L-type angle 3i, 3j, 3k Air pipe 4 Water layer 5 Connection hose 6 Ring blower 7 Blower chamber 8 Dry filter 8a Exhaust pipe 8b Screw rod 8c Paper filter 8d Metal cylinder 8e, 18c Bow nut 9 Valve 10a Upper drain pipe 10b Lower drain pipe 11 Drain pipe 12 Opening / closing hole 13 Water level detection window 14 Upper lid 14a, 16 Handle 15 Clamp 17a, 17b, 17c Wheel 18 Metal plate 18a Passing hole 18b Inserting hole 19 Cover plate 20 Power switch

Claims (8)

[Claims] 1. A first dust collection chamber in which air containing dust is supplied from above and swirls through a cylindrical portion to collect and drop dust having a relatively large weight and a large particle diameter. A second dust-collecting chamber in which an upper portion of the first dust-collecting chamber is connected to a lower portion of the water layer, and an upper chamber above the water layer of the second dust-collecting chamber. Air suction and exhaust means for sucking and exhausting the air in the upper chamber, wherein the air in the upper chamber of the second dust collection chamber is suctioned by the air suction and exhaust means to make the upper chamber a negative pressure. The dust is formed, and thus the water layer is destroyed to apply a negative pressure to the first dust collection chamber to suck air from the outside, and the dust having a relatively small particle diameter mixed into the air that has entered the second dust collection chamber. Is
When the air passes from the bottom of the water layer to the upper chamber, the air is washed by water droplets and water bubbles diffused into the upper chamber and collected in the water layer. 2. The second dust collection chamber has a thin water layer stored at the bottom, an air flow path for guiding air from the bottom of the water layer to an upper chamber, and Air flow path forming means for dispersing and forming the provided air flow path, and when the water layer is broken and water droplets and water bubbles are diffused into the upper chamber, the water droplets and water bubbles are formed in the air flow path. The dust collector according to claim 1, further comprising: a cover plate that prevents entry. 3. A method according to claim 1, wherein said air flow path forming means comprises a metal plate having holes dispersed at predetermined pitches on one surface thereof, and said metal plate is detachably mounted in said water layer. The dust collector according to claim 1. 4. The dust collector according to claim 3, wherein a handle is provided on the upper surface of the metal plate to indicate a water level of the water layer. 5. The dust collector according to claim 1, wherein a dry filter is mounted on an exhaust port exhausted by the air suction and exhaust means. 6. A drain pipe for guiding drainage, which is opened and closed by a valve, to the outside of the dust collection chamber, is connected to a bottom of the water layer accommodated in the second dust collection chamber. The dust collector according to claim 1, 2, 3, 4, or 5. 7. The collecting device according to claim 6, wherein an opening and closing hole for eliminating clogging of a drain hole at a bottom of the water layer is provided on an exterior of the second dust collecting chamber. Dust equipment. 8. A water level detection window for visually recognizing a water level in a water layer is formed on an exterior of the second dust collection chamber. A dust collector according to claim 6, 6 or 7.