JPH1157358A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the interval of maintenance by prolonging the service life of a main filter. SOLUTION: A dust collector for removing large quantity of dust in the air is constituted of a 1st collecting part (a flocculating part 7 and a deposition vessel part 12) for flocculating, coarsening and collecting the dust or the like and a 2nd collecting part (a main filter 14) for removing the dust remaining after the removal of the coarse dust and the like in the 1st collecting part. The flocculating part 7 is composed of a throttle part 8 for increasing the flow velocity, a dust-containing air tray 9 for receiving the air jetted from a jetting port 8A of the throttle part 8, a fiber layer 10 packed in the tray 9 and for passing the high speed air and checking the flow of the dust and the like to temporarily collect in the tray 9, to flocculate and to coarsen and a flow straightening collecting layer for turning the turbulent flow in the upstream to the quiet flow and temporarily collecting the coarsened dust and the like, flocculating and coarsening. In the deposition vessel part 12, the coarsened dust and the like falls dot from the air flow by the dead weight and collected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector for removing dust and the like from dust-containing air containing dust and the like and collecting the dust.
In particular, the present invention relates to a dust collection device suitable for collecting dust and the like in the air containing a large amount of dust and the like.

[0002]

2. Description of the Related Art A dust collector for filtering dust-containing air sucked from a work place or a machine that generates a large amount of dust and returning it to clean air is well known. A dry dust collector is generally used, in which a so-called bag filter is used as a main filter in which a plurality of filter cloths are bundled.

However, if air containing a large amount of dust or the like is directly filtered by a bag filter, clogging occurs in a short period of time, and frequent maintenance is required. In order to solve this problem, there is an idea that a pre-filter is provided in a stage preceding the main filter to reduce the burden on the main filter. As an example of collecting coarse dust and the like in advance to reduce the burden on the main filter, for example, Japanese Utility Model Publication No. 60-27449
There is a "pre-dust box for dust collection" described in Japanese Patent Publication No.
Here, an inclined plate material is provided in the air flow path, coarse dust and the like collide with this plate material, fall down by its own weight and are collected, and then dust and the like having a small particle size are collected by a filter. I am trying to do it.

[0004]

However, the conventional apparatus having the above configuration has the following problems.

[0005] Removal of dust and the like, which is performed as a pre-stage of the filtration process by the main filter, targets existing coarse dust and the like. For this reason, in the case of dust-containing air containing a large amount of dust and the like having a small particle diameter, the dust-containing air passes without being substantially removed, and there is a problem that the burden on the main filter can hardly be reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a dust collecting apparatus capable of efficiently collecting dust and the like from air containing a large amount of dust having a small particle diameter. Aim.

[0007]

According to a first aspect of the present invention, there is provided a dust collecting apparatus for passing dust-containing air containing dust and the like and collecting and removing the dust and the like from the air. And a first collection unit that aggregates and collects dust and the like in dust-containing air and collects and collects the dust and the like, and is provided downstream of the first collection unit to remove the coarse and dust and the like. And a second collection unit that collects and removes dust and the like remaining from the air after the dust collection.

[0008] With the above structure, dust and the like in the dust-containing air that has flowed in the first collection unit are aggregated. As a result, dust and the like having a small particle diameter are combined with each other and coarsened. Coarse dust and the like are easily collected. As a result, even in the case of dust-containing air containing a large amount of dust and the like having a small particle size, most of the dust and the like are removed from the air in the first collection unit and sent to the second collection unit.

An ordinary filter or the like is used for the second collection unit. The dust-containing air from which most of the dust and the like have been removed by the first collection unit flows into the filter and the like, and the remaining dust and the like are collected and the air is purified. Thereby, the second
The collection amount of dust and the like in the collection unit can be significantly reduced, and the period of maintenance such as replacement or cleaning can be significantly extended.

In the dust collecting apparatus according to a second aspect of the present invention, the first collecting part is provided on the inlet side and aggregates the dust and the like contained in the inflowing air to make them coarse. And a collection container for dropping and collecting dust and the like coarsened in the portion from the airflow by its own weight.

According to the above configuration, the dust and the like in the inflowing air are aggregated and coarsened in the aggregation section, so that the dust and the like become large and heavy. Then, the heavy dust and the like fall off without being ridden by the flow of air due to its own weight and are collected in the accumulation container portion.

[0012] In the dust collecting apparatus according to a third aspect of the present invention, the aggregating section is provided with a narrowing section for narrowing the passage of the dust-containing air to increase the flow velocity thereof, and facing the outlet of the narrowing section. A dust-bearing air pan that directly receives the spouted dust-bearing air, and is filled in the dust-bearing air pan, allowing air to flow at a high speed and blocking the flow of dust and the like in the air to contain the dust and the like. A fiber layer that is temporarily collected in an air pan and aggregated to increase the particle size, and a flow of air that is provided downstream of the dust-containing air pan and becomes turbulent in the dust-containing air pan. It is characterized in that it comprises a rectifying collection layer that makes a quiet flow and temporarily collects dust and the like that are coarsened by a dust-containing air pan, and aggregates and further coarsens the dust.

According to the above configuration, the dust-containing air blown out at a high speed from the throttle portion hits the dust-containing air tray and flows downstream from the surrounding area. At this time, in the fiber layer in the dust-containing air pan, air passes at a high speed to some extent, but dust and the like are stopped from flowing and accumulate in the dust-containing air pan. That is, the dust is temporarily collected in the dust-containing air pan. Dust and the like accumulated and stacked in the dust-containing air pan are aggregated to have a coarse particle size. The coarse dust and the like are pushed down by the high-speed air flow and move downstream. The coarse dust and the like that have flowed to the downstream side are collected by the rectification collecting layer, stacked and further coarsened. The rectification trapping layer vibrates due to the turbulence of the air on the upstream side, and the accumulated dust and the like separates from the oscillating rectification trapping layer and flows downstream. At this time, since the flow of air is quiet on the downstream side of the rectification trapping layer, coarse dust and the like fall off due to its own weight without riding on the flow of air and are collected in the deposition container section.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dust collector according to the present invention will be described below with reference to the accompanying drawings.

The dust collecting apparatus 1 of the present embodiment is shown in FIGS.
It is configured as shown in FIG. Reference numeral 2 in the drawing denotes an apparatus main body that constitutes the outer shape of the dust collector 1. An inlet 3 and an outlet 4 are provided near the upper end of the apparatus main body 2. The inlet 3 is connected to a duct (not shown) extending to a dust-containing air generating portion, a blower (not shown), and the like. The outlet 4 is connected to a duct (not shown) for discharging the cleaned air to the outside or returning it to the original state.

A partition plate 5 is provided at a central position in the apparatus main body 2 so as to partition the inlet 3 side and the outlet 4 side.
The partition plate 5 is provided to extend downward from the central position of the upper end of the apparatus main body 2. A sufficient space is provided between the lower end of the partition plate 5 and the bottom of the apparatus main body 2, and this space portion serves as a later-described deposition container portion 12. As a result, the air that has flowed into the apparatus main body 2 once descends and flows to the deposition container section 12 at the bottom of the apparatus main body 2, the direction of the air is bent inside the deposition container section 12, and the air is discharged from the outlet 4. It is supposed to be. That is, an air flow path through which dust-containing air flows from the inlet 3 to the outlet 4 through the bottom of the apparatus main body 2 is formed.

An aggregating section 7 is provided on the inlet 3 side of the upstream air flow path which is an air flow path from the inlet 3 to the deposition container section 12. The aggregating section 7 includes a throttle section 8, a dust-containing air pan 9, a fiber layer 10, and a rectification trapping layer 11.

The throttle section 8 is provided at a position facing the inlet 3 in the air flow path. The throttle portion 8 is formed of a plate material having an ejection port 8A having a diameter smaller than the air flow path at the center. This air outlet 8A narrows the air flow path and increases the flow velocity of the air flowing through the air flow path.

The dust-containing air receiving tray 9 is a plate for directly receiving dust-containing air blown out at a high speed from the blowing port 8A of the throttle unit 8, and is provided at a position facing the blowing port 8A. This dust-containing air receiving tray 9 is composed of a flat bottom plate 9A and a wall plate 9B formed on the periphery thereof, and the air blown out from the blowout port 8A hits the bottom plate 9A and surrounds it (right sideways). It spreads, flows once in the opposite direction along the wall plate 9B, and flows downstream.

The fiber layer 10 is for passing air flowing at high speed as it is and for preventing the flow of dust and the like contained in the air. The fiber layer 10 is made of a non-woven sheet of synthetic fiber, and is set to such a fine degree that the flow of dust and the like can be prevented. The fiber layer 10 is filled in the dust-containing air pan 9 to allow the flow of air blown out from the discharge port 8A into the dust-containing air pan 9 and to block the flow of dust and the like, thereby removing the dust and the like. The particles are temporarily collected in the receiving tray 9 and aggregated to coarsen the particle diameter.

The rectification trapping layer 11 makes the turbulent flow and the like on the upstream side quiet and flows to the downstream side, and the dust-containing air pan 9
For temporarily collecting dust, etc.
It is provided downstream of the dust-containing air pan 9. The rectification trapping layer 11 is formed of a plate-shaped synthetic fiber nonwoven fabric filter. The filter includes a dust-containing air pan 9
The fineness is set to such a degree that dust and the like coarsened in the above can be collected. As a result, the high-speed airflow generated by the throttle unit 8 or the turbulent flow generated in the dust-containing air pan 9 is suppressed by passing through the rectifying trapping layer 11 and becomes a quiet flow.
It flows into the deposition container section 12. further,
The rectification trapping layer 11 temporarily collects dust and the like that are coarsened in the dust-containing air receiving tray 9 and aggregates each other to further coarsen the dust.

The rectification trapping layer 11 is used as it is without being replaced even if clogging occurs in principle. This is because the clogging is positively caused to cause the
This is for facilitating collection at 2. That is, if the dust or the like collected in the rectification collection layer 11 is used as it is in a state in which it is stacked and agglomerated, coarsened and clogged, the rectification and collection due to turbulent flow on the upstream side and the like. When the layer 11 is shaken and vibrated, and coarse dust and the like reach the holding limit, they are separated from the rectifying and collecting layer 11 and flow toward the deposition container 12.
The dust and the like separated at the holding limit have a considerable size, and are easily separated from the air flow and collected in the deposition container section 12. For this reason, even if clogging occurs, the rectification trapping layer 11 is used as it is without being replaced, and efficient coarsening of dust and the like is achieved.

This rectification trapping layer 11 is provided with a dust-containing air pan 9
In the state of being disposed on the downstream side, the upstream air flow path is covered at a position facing the deposition container section 12, but at the same time, the
A downstream air flow path, which is an air flow path from 2 to the outlet 4, is also covered at a position facing the deposition container section 12. That is, it is disposed so as to cover the entire deposition container section 12. As a result, the rectification trapping layer 11 functions as a first filter that traps dust and the like from the dust-containing air receiving tray 9 side in the upstream air flow path, and the dust and the like that have not fallen in the deposition container portion 12. And also has a function as a second filter that collects air.

The deposition container section 12 is for accumulating and collecting coarse dust and the like that fall off the rectifying collection layer 11 and fall. The deposition container section 12 includes the apparatus main body 2.
Of the apparatus main body 2 itself.
The air flow path is bent by 180 degrees from the upstream air flow path to the downstream air flow path in the deposition container section 12. As a result, the dust and the like that have become coarse and heavy fall down due to their own weight. That is, the heavy dust and the like fall on the gentle airflow flowing downward,
Without being able to ride the flow of air that was bent upward on the way,
It falls off from the air flow, falls down as it is, and accumulates in the accumulation container section 12.

The deposition container section 12 is fixed by a flange section 13 and can be separated at the flange section 13. After a certain amount of dust accumulates,
Only the deposition container section 12 is cut off to dispose of dust and the like inside. The deposition container section 12 may be a container formed as a part of the apparatus main body 2 or may be a container which is originally a separate member such as a drum. In particular, when a drum can is used, the treatment of accumulated dust and the like becomes easy. In the aggregating section 7 and the accumulation container section 12, dust and the like in the dust-containing air are aggregated,
A first collection unit that collects and collects coarse particles is configured.

On the downstream side (downstream air flow path) of the deposition container section 12, dust and the like having a small particle diameter are collected and removed from the air after the coarse dust and the like have been removed in the deposition container section 12. A main filter 14 is provided as a second collection unit. The main filter 14 includes a plurality of bag filters 1.
5 together. This bug filter 15
Has the ability to collect minute dust and the like. As a result, minute dust and the like are finally removed by the main filter 14, and the clean air is discharged to the outside from the outlet 4.

[Operation] The dust collector 1 configured as described above operates as follows.

When dust-containing air containing a large amount of dust flows into the apparatus main body 2 from the inlet 3, the dust-containing air is
And is blown to the dust-containing air pan 9 as a high-speed air flow. In the dust-containing air pan 9, the dust-containing air is
It flows inside the fiber layer 10, hits the bottom plate 9A of the dust-containing air pan 9, spreads around, and is pushed back in a slightly opposite direction by the peripheral wall plate 9B to flow downstream. At this time, the air passes through the fiber layer 10 and flows downstream as it is, and flows to the rectification trapping layer 11 while generating turbulence. Dust, etc. is in the fiber layer 1
0, the flow is suppressed and collected temporarily, and the bottom plate 9A
(D in FIG. 2). Dust and the like deposited on the bottom plate 9A are combined with each other and aggregated, and the particle size is coarsened. The coarse dust and the like have increased air resistance and are pushed by the airflow. When the dust reaches the limit, the dust is flowed downstream and flows into the rectification trapping layer 11.

In the rectification collecting layer 11, coarse dust and the like are collected and gradually stacked. The stacked dust and the like are aggregated and further coarsened. Thereby, the rectification trapping layer 11 gradually becomes clogged, and the air resistance increases. Since turbulence occurs on the upstream side of the rectification trapping layer 11, the turbulence causes the rectification trapping layer 11 to shake and vibrate. As a result, before the clogging of the rectification trapping layer 11 becomes severe, the retention limit is reached and dust and the like are separated from the rectification trapping layer 11 and flow toward the deposition container section 12. Dust and the like separated at the holding limit have a considerable size (weight).

On the other hand, the flow of air is gentle in the deposition container section 12 downstream of the rectifying and collecting layer 11, and the separated dust and the like are generated by the quiet air flowing downward from the rectifying and collecting layer 11. It falls down on the flow. Then, while the air changes its flow upward on the way, dust and the like fall off without being able to ride on the flow of the air due to its own weight, and fall as it is to fall and accumulate in the accumulation container portion 12. As a result, coarse dust and the like are collected in the deposition container section 12.

The air after the coarse dust and the like fall off is
It passes through the rectification trapping layer 11 and flows into the downstream air flow path.
At this time, a relatively large amount of dust, etc.
Collected at 1. The air that has passed through the rectification trapping layer 11 flows into the main filter 14, where dust and the like having a small particle diameter that have finally remained are trapped. The air that has been cleaned through the main filter 14 is discharged from the outlet 4 to the outside.

When the inside of the stacking container section 12 is full of dust and the like, the stacking container section 12 is removed and the dust and the like inside are processed. Or, it is replaced with a new deposition container section 12. In particular, when a drum can is used as the deposition container section 12, the drum can is replaced with an empty drum can, and the drum can filled with dust or the like is covered and processed thereafter.

[Effect] As described above, before the dust and the like in the air flow into the main filter 14, the dust and the like are coarsened in the aggregating section 7 so as to be easily collected. Of the main filter 1
4 can significantly reduce the amount of dust and the like flowing into,
The life of the main filter 14 can be extended.
In particular, when a large amount of dust or the like is contained in the air, most of the dust or the like is collected by the aggregation section 7 and the accumulation container section 12 before flowing into the main filter 14.
Can greatly extend the life of the device.

Further, the fiber layer 10 and the rectifying and collecting layer 11 do not need to be replaced, and only the main filter 14 needs to be maintained. However, the life of the main filter 14 is greatly extended. Can be extended.

As a result, the running cost of the dust collecting device 1 can be greatly reduced.

Further, when dust or the like is full in the accumulation container portion 12, the accumulation container portion 1 is
Since it is only necessary to remove and replace the device 2, the post-processing of collected dust and the like becomes extremely easy.

[Modification] In the above embodiment, the main filter 14 is constituted by the bag filter 15, but a medium-performance filter, a high-performance filter, or the like may be used in accordance with conditions such as a difference in particle size of dust and the like in the air. Use selectively.

[0038]

As described in detail above, according to the present invention,
The following effects are obtained.

Before the dust and the like in the air flow into the second collecting portion, the dust and the like are coarsened in the aggregating portion of the first collecting portion so as to be easily collected. To collect,
The amount of dust and the like flowing into the second collection unit can be significantly reduced, and the life of the second collection unit that needs to be replaced can be extended. In particular, if the air contains a large amount of dust, the second
Since most of the dust and the like are collected in the aggregation section and the accumulation container section before flowing into the collection section, the life of the second collection section can be greatly extended.

Further, since the first collection unit does not require replacement, the life of the second collection unit requiring maintenance can be greatly extended, so that the maintenance period can be greatly extended. As a result, the running cost of the dust collector can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a schematic configuration of a dust collector according to the present invention.

FIG. 2 is a partial sectional view showing a main part of the dust collector according to the present invention.

[Explanation of symbols]

1: dust collecting device, 2: device main body, 3: inlet, 4: outlet,
5: partition plate, 7: agglomerated part, 8: squeezed part, 9: dust-containing air pan, 10: fiber layer, 11: rectifying trapping layer, 12: deposition container part, 13: flange part, 14: main filter, 1
5: Bag filter.

Claims (3)

[Claims] 1. A dust collector for passing dust-containing air containing dust and the like and collecting and removing the dust and the like from the air, provided at an inlet side, and aggregating the dust and the like in the dust-containing air. A first collection unit that collects and collects the dust, and a dust collection unit that is provided downstream of the first collection unit and collects dust and the like remaining from the air after the coarse dust and the like are removed. A dust collecting device, comprising: a second collecting portion to be removed. 2. The dust collecting apparatus according to claim 1, wherein the first collecting unit is provided on an inlet side, and aggregates the dust and the like contained in the inflowing air to make them coarse. A dust collecting unit configured to drop dust and the like coarsened in the aggregating unit from the airflow by its own weight and collect the dust. 3. The dust collecting apparatus according to claim 2, wherein the aggregating section is provided with a throttle section that narrows a passage of the dust-containing air to increase the flow velocity thereof, and is provided facing an outlet of the throttle section. A dust-bearing air pan that directly receives dust-bearing air ejected at a high speed; and a dust-filled air pan filled in the dust-bearing air pan, which allows high-speed flowing air to pass therethrough and prevents the flow of dust and the like in the air to reduce the dust and the like. A fiber layer that is temporarily collected in the dust-containing air pan and aggregated to increase the particle size; and a fiber layer provided downstream of the dust-containing air pan and turbulent in the dust-containing air pan. A dust collecting device comprising: a rectifying collection layer that makes the flow quiet and temporarily collects dust and the like that have been coarsened by a dust-containing air pan, and aggregates and further coarsens the dust. .