WO2014132441A1

WO2014132441A1 - Exhaust filter

Info

Publication number: WO2014132441A1
Application number: PCT/JP2013/055673
Authority: WO
Inventors: 繁中島
Original assignee: 株式会社伊万里鉄鋼センター
Priority date: 2013-03-01
Filing date: 2013-03-01
Publication date: 2014-09-04
Also published as: JP5638725B1; JPWO2014132441A1

Abstract

The present invention makes it possible to obtain an exhaust filter that can be installed in a pre-installed exhaust path comprising a low-pressure exhaust filter, that does not clog, that is capable of recovering fine particles at a high recovery rate, and that has good maintenance properties. An exhaust filter (1) is provided with a plurality of cylindrical container-like fine particle recovery cells (10) that are arranged adjacent to each other and a partition plate (20) that blocks exhaust while supporting the fine particle recovery cells (10). Each of the fine particle recovery cells (10) is provided with a guiding flow path (13) that guides exhaust along the circumferential direction, an inlet opening (11) that allows exhaust to flow into the fine particle recovery cells (10), a centrifugal separation unit (15) that centrifugally separates fine particles from exhaust that has flowed in from the inlet opening (11), and an outlet opening (12) that discharges exhaust from which fine particles have been centrifugally separated and allows the exhaust to flow out of the fine particle recovery cells (10). The inlet opening (11) is provided upstream from the partition plate (20) and the outlet opening (12) is provided downstream from the partition plate (20).

Description

Exhaust filter

The present invention relates to an exhaust filter that collects dust in the exhaust.

Generally, an exhaust filter that collects dust from the exhaust of indoor air in a factory or the like adsorbs dust in the exhaust by a filter material such as fiber or sponge. In addition, as a dust collecting device, a device that feeds air containing dust into a cylindrical collecting container to form a swirling airflow in the container and collects the dust in the container by centrifugation is known. (See Patent Document 1 below).

JP 2008-237951 A

The air in the paint chamber is exhausted to the outside so that the dust of the paint mist that has not been applied is not filled or deposited in the room or the indoor concentration of the evaporated solvent is not excessively high. Also, in other factories and the like, indoor air is generally exhausted for ventilation in order to avoid the adverse effects of dust generated indoors. At this time, since the dust in the exhaust gas is released as it is, the external environment is deteriorated, so that the dust is collected through the exhaust filter. Here, the term “room” includes all of a relatively wide space including a work space to a relatively narrow space such as a device / apparatus.

Conventional exhaust filters using filter materials such as fibers must increase the fiber density of the exhaust filter when trying to obtain a high recovery rate for dust with a very small particle diameter such as paint dust. Absent. However, when the fiber density is increased, clogging is likely to occur, so that the number of times of maintenance for cleaning and replacement becomes frequent, and much maintenance is required.

On the other hand, the dust collection device by centrifugation described above can collect dust without causing clogging. However, in order to perform centrifugation in the collection container, it is necessary to use a relatively high-pressure blower (blower) in order to form a high-speed swirling airflow. For this reason, it cannot be incorporated into an existing exhaust path equipped with a low-pressure exhaust fan, and a dust collection device equipped with a high-pressure blower will be separately installed, which only requires expensive capital investment. In addition, since a relatively large apparatus deployment space is required, the required space may not be secured in the room.

The present invention is an example of a problem to deal with such a problem. In other words, when providing an exhaust filter that collects dust in the exhaust, a high recovery rate can be obtained even for dust with a small particle diameter such as paint dust, and it can be used for a long time without clogging. It can be installed in an existing exhaust path with a relatively low-pressure exhaust fan, and it has high dust recovery performance. It is an object of the present invention to be able to do this, to eliminate expensive capital investment and a wide installation space.

In order to achieve such an object, the exhaust filter according to the present invention has at least the following configuration.

An exhaust filter that is provided in an exhaust path including an exhaust fan and collects dust in exhaust, a plurality of cylindrical container-shaped dust collection cells arranged close to each other along a plane direction intersecting a cylindrical axis, and a plurality of dust collection cells A partition plate that blocks exhaust while supporting the dust collection cell, the dust collection cell is arranged so that its cylindrical axis direction is along the exhaust path, and each of the dust collection cells is provided on an outer peripheral side surface. A guide channel for guiding the exhaust along the circumferential direction, an inlet opening in the circumferential direction at the downstream end of the guide channel, and allowing the exhaust to flow into the dust collection cell; and the flow A centrifuge for centrifuging dust from the exhaust gas flowing in from the inlet, and an outflow port for leading the exhaust gas from which the dust has been separated to flow out of the dust collection cell, are provided upstream of the partition plate. If you have an entrance Exhaust filter, characterized in that providing the outlet to the downstream side of the partition plate.

According to the exhaust filter having such a feature, dust can be collected in the dust collection cell by centrifugal separation in the dust collection cell, and dust can be collected on the partition plate by the exhaust interference of the exhaust gas flowing out from the dust collection cell. Can be recovered. As a result, dust can be recovered at a high recovery rate even for dust having a small particle diameter such as paint dust, and long-term continuous use can be performed without causing clogging. Moreover, since the dust collected in the dust collection cell or on the partition plate can be easily removed, it has good maintainability and can reduce maintenance work.

In addition, a cylindrical container-shaped dust collection cell is miniaturized and a plurality of dust collection cells are arranged close to each other along a plane direction intersecting the cylindrical axis, and each dust collection cell is provided with a guide channel, an inlet, a centrifugal separator, and an outlet. Therefore, the dust can be centrifuged in each of the plurality of dust collection cells by increasing the flow rate of the exhaust by the low-pressure exhaust fan. As a result, it can be incorporated into an existing exhaust path equipped with a low-pressure exhaust fan, and high dust recovery performance can be exhibited. In addition, since it can be easily installed in the exhaust filter storage space of the existing exhaust path, expensive equipment investment and a large installation space are unnecessary, and a high-performance exhaust filter can be installed without modifying the existing exhaust equipment. can do.

It is explanatory drawing which showed the example of installation of the exhaust filter which concerns on embodiment of this invention. It is explanatory drawing which showed the whole structure of the exhaust filter which concerns on embodiment of this invention (FIG. 2 (a) is a front view, FIG.2 (b) is a top view). It is explanatory drawing (appearance perspective view) explaining the structure of the dust collection | recovery cell in embodiment of this invention. It is explanatory drawing (internal structure explanatory drawing) explaining the structure of the dust collection | recovery cell in embodiment of this invention. It is explanatory drawing which showed the arrangement | positioning state of the dust collection | recovery cell in embodiment of this invention. It is explanatory drawing which shows the dust collection function of the exhaust filter which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an installation example of an exhaust filter according to an embodiment of the present invention, and shows an exhaust path for exhausting the paint chamber. In this example, the exhaust filter 1 is installed in the upper part of the painting chamber P. An exhaust duct D is connected to the exhaust filter 1 via a fire shutter S, and an exhaust fan F is connected in the middle of the exhaust duct D. Here, the upstream side of the exhaust fan F is an indoor duct D _I , and the downstream side of the exhaust fan F is an outdoor duct D _O. The exhaust filter 1 according to the embodiment of the present invention is provided in the exhaust path provided with the exhaust fan F as described above, and collects dust in the exhaust. The exhaust filter 1 according to the embodiment of the present invention can be installed in the exhaust path provided with the exhaust fan F as described above without distinguishing between existing and new installations, but in particular, without modifying the existing exhaust path. One advantage is that it can be used.

FIG. 2 is an explanatory view showing the overall configuration of the exhaust filter according to the embodiment of the present invention (FIG. 2 (a) is a front view and FIG. 2 (b) is a plan view). The exhaust filter 1 is provided in an installation frame 2 that communicates with an indoor space such as the painting chamber P, and includes a plurality of dust collection cells 10 and a partition plate 20. The dust collection cell 10 has a cylindrical container shape and is arranged so that the cylindrical axis direction is along the exhaust path. Further, a plurality of dust collection cells 10 are arranged close to each other along a plane direction intersecting the cylindrical axis, and are supported by the partition plate 20 in such a state of being arranged close to each other.

Each dust collection cell 10 includes a container portion 10A and a lid portion 10B, and an inflow port 11 through which exhaust gas flows into the dust collection cell 10 is provided in the container portion 10A, and the exhaust gas that flows into the dust collection cell 10 Is provided in the lid portion 10B. For example, support holes (not shown) are formed in the partition plate 20 at each position where the individual dust collection cells 10 are arranged, and the upper portion of the container portion 10A is inserted into the support holes from the lower side of the partition plate 20 to separate the partition holes. A plurality of dust collection cells 10 are supported on the partition plate 20 by attaching the lid portion 10B to the upper portion of the container portion 10A from the upper side of the plate 20.

The partition plate 20 has a function of blocking the exhaust formed by the exhaust fan F in the installation frame 2, the inlet 11 is provided on the upstream side of the partition plate 20, and the outlet 12 is provided on the downstream side of the partition plate 20. Provided. As a result, all the exhaust gas formed by the exhaust fan F flows into the inflow port 11 on the upstream side of the partition plate 20, and flows out from the outflow port 12 through the dust collection cell 10, thereby separating the partition plate. 20 downstream.

The exhaust V1 that flows into the installation frame 2 from the interior of the painting chamber P or the like contains dust such as paint dust, but a part of the dust passes through the dust collection cell 10 so that a part of the dust is in the dust collection cell 10. To be recovered. The exhaust V2 flowing out from the outlet 12 is interfered with each other in the space (exhaust interference space) 2S on the downstream side of the partition plate 20 in the installation frame 2. As a result, the dust remaining in the exhaust V2 falls and accumulates on the partition plate 20, and the exhaust V3 from which the dust is further removed is directed downstream of the exhaust filter 1.

3 and 4, the structure of the dust recovery cell in the embodiment of the present invention will be described. FIG. 3 is an external perspective view of the dust collection cell, and FIG. 4 is an explanatory diagram of the internal structure of the dust collection cell (FIG. 4A is an overall view, and FIG. 4B is an XX cross-sectional view).

Each cylindrical container-shaped dust collection cell 10 includes a guide channel 13 and the above-described inlet 11 on the outer peripheral side surface 10S. The guide flow path 13 is a portion that is provided on the outer peripheral side surface 10S and guides the exhaust gas along the circumferential direction. In the illustrated example, a part of the outer peripheral side surface 10S is recessed inward, and the recess The amount is gradually increased along the circumferential direction. The inflow port 11 opens at the downstream end of the guide channel 13 in the circumferential direction. By providing such a guide channel 13 and the inlet 11, the airflow flowing into the dust collection cell 10 can be directed in the circumferential direction of the dust collection cell 10 and is necessary for centrifugation in the dust collection cell 10. A simple swirling airflow can be formed.

In the illustrated example, the guide channel 13 and the inlet 11 are arranged in multiple stages along the cylindrical axis direction of the dust collection cell 10. Thus, by providing the guide channel 13 and the inlet 11 in multiple stages, the flow rate of the exhaust gas flowing into the dust collection cell 10 can be increased. At this time, if the width of the guide channel 13 and the inlet 11 is simply increased in order to secure the flow rate, the direction of the airflow flowing into the dust collection cell 10 does not turn in the circumferential direction and the flow velocity is increased. Since it becomes late, it becomes impossible to obtain the direction and flow velocity of the swirling air flow necessary for the centrifugal separation. Therefore, in the embodiment of the present invention, as shown in the figure, the guide flow path 13 and the inflow port 11 are arranged in multiple stages, and the adjacent guide flow paths are partitioned by the air guide wall 14. By providing such an air guide wall 14, the direction and flow velocity of the swirling air flow necessary for the centrifugal separation can be obtained while increasing the flow rate of the exhaust gas flowing into the dust collection cell 10.

Further, by adopting such a configuration of the guide flow path 13 and the inflow port 11, it is possible to form a swirling air flow necessary for centrifugal separation using a relatively low pressure exhaust fan. The above-described dust collecting device of the prior art obtains a swirling airflow necessary for centrifugal separation by flowing an airflow into a container by a high-pressure blower and duct. In the embodiment of the present invention, the dust collecting cell 10 Since the inflow resistance can be reduced by adopting the guide channel 13 formed on the outer peripheral side surface 10S, a swirling air flow having a desired flow velocity can be formed in each dust collection cell 10 even by a low-pressure exhaust fan.

The dust collection cell 10 includes therein a centrifuge 15 for centrifuging dust from the exhaust flowing in from the inlet 11, a lead-out pipe 16 for leading the exhaust from which the dust is centrifuged, and a lead-out pipe 16 is provided with an outlet 12 through which the exhaust gas led out by the outlet 16 flows out of the dust collection cell 10.

The centrifuge 15 has an inverted conical tapered surface 15A whose inner diameter gradually decreases downward from the inner peripheral surface of the container 10A, and an opening 15B is formed at the lower end of the tapered surface 15A. . The outlet pipe part 16 extends vertically along the cylindrical central axis of the dust collection cell 10, and an outlet 12 is formed at the upper end thereof.

In the centrifugal separator 15, the swirling airflow of the exhaust gas flowing into the dust collection cell 10 is collected at the center of the dust collection cell 10 while accelerating and swirling along the inverted conical tapered surface 15 </ b> A, and the cylindrical center of the dust collection cell 10 is collected. It is drawn into the outlet pipe part 16 arranged along the axis. At this time, the dust in the swirling airflow accelerated by the centrifugal separator 15 moves to the opening 15B while being pressed along the tapered surface 15A by centrifugal force, and is dropped and collected at the bottom of the container 10A.

FIG. 5 is an explanatory view showing an arrangement state of the dust collection cell 10. As described above, the plurality of dust collection cells 10 are arranged close to each other along a plane that intersects the cylindrical axis. At this time, since the dust collection cell 10 has a cylindrical shape, the gap along the outer peripheral side surface 10S can be reduced in the arrangement along the X direction or the Y direction shown in the drawing, but it is oblique to the X direction or the Y direction. In the arrangement, the clearance between the outer peripheral side surfaces 10S is relatively large. In the embodiment of the present invention, the guide flow path 13 and the inflow port 11 of the dust collection cell 10 are provided at a plurality of locations (four locations) along the circumferential direction, and the position of the inflow port 11 is adjacent to the outer peripheral side surface 10S. It is arranged at a position where the gap becomes large. By disposing the inflow port 11 at such a position, even when the dust collection cells 10 are arranged at a high density by making the proximity distance between adjacent dust collection cells 10 narrower, the exhaust inflow amount from the inflow port 11 Can be secured sufficiently. Further, in the embodiment of the present invention, the inflow port 11 is formed at a position recessed inward from the outer peripheral side surface 10S, so that the dust collection cell 10 can be arranged closer to this configuration also.

FIG. 6 is an explanatory diagram showing the dust collection function of the exhaust filter according to the embodiment of the present invention. The 1st dust collection | recovery location in the exhaust filter 1 which concerns on embodiment of this invention is in the container of the dust collection | recovery cell 10 as mentioned above. Exhaust V1 directed from the interior of the paint chamber P or the like toward the exhaust filter 1 is formed by suction of the relatively low-pressure exhaust fan F, so that a large flow rate cannot be obtained. However, since the exhaust V1 passes through the gap between the outer peripheral side surfaces 10S of the dust collection cells 10 arranged in proximity, the flow velocity increases, and the direction is changed by the guide flow path 13 and flows into the dust collection cell 10. Even if suction is performed by a relatively low-pressure exhaust fan F, a swirling airflow having a flow rate necessary for centrifugation is formed in the dust collection cell 10. Due to this swirling airflow, the centrifugal separation unit 15 centrifuges the dust, and a part of the dust in the exhaust V1 is collected in the dust collection cell 10.

Further, the second dust collection point in the exhaust filter 1 according to the embodiment of the present invention is on the partition plate 20. The exhaust V2 flowing out from the outlet 12 of the dust collection cell 10 flows out above the partition plate 20 in a spiral state under the influence of the swirling airflow in the dust collection cell 10. An exhaust interference space 2S is provided above the partition plate 20, and the spiral exhaust V2 flowing out from the outlet 12 of the dust collection cell 10 disposed in the vicinity collides with each other and becomes a turbulent flow. The flow rate of the exhaust V2 rapidly decreases. At this time, the dust remaining in the exhaust V2 is dispersed when the spiral exhaust V2 collides with each other. However, as the flow velocity decreases, the dust becomes relatively low with respect to the upper part near the exhaust duct. It falls and accumulates on the partition plate 20 that is present.

Next, the maintainability of the exhaust filter 1 according to the embodiment of the present invention will be described. The exhaust filter 1 collects dust collected inside with a suction hose without removing the dust collection cell 10 from the partition plate 20, and similarly sucks and collects dust accumulated on the partition plate 20, thereby simplifying maintenance. Thus, exhaust can be continued after maintenance in a short time. Although dust may adhere to the outer peripheral side surface 10S of the dust collection cell 10, it can be easily removed by using a brush or the like by making the dust collection cell 10 a resin molded body having a smooth surface. At this time, if the exhaust fan is operated at a low speed, the dust removed by the brush or the like can be recovered in the dust recovery cell 10.

The exhaust filter 1 according to the embodiment of the present invention having such a feature can collect dust in the dust collection cell 10 by centrifugal separation in the dust collection cell 10 and flows out of the dust collection cell 10. Since dust can be collected on the partition plate 20 by the exhaust interference of the exhaust, dust can be collected at a high recovery rate even for dust having a small particle diameter such as paint dust, and clogging occurs. And can be used continuously for a long time. Moreover, since the dust collect | recovered in the dust collection | recovery cell 10 or the partition plate 20 can be removed easily, it has favorable maintenance property and can reduce the maintenance labor.

Further, the exhaust filter 1 according to the embodiment of the present invention includes a low-pressure exhaust fan because the exhaust flow rate of the low-pressure exhaust fan can be increased and the dust can be centrifuged in each of the plurality of dust collection cells 10. It can be incorporated into an existing exhaust path and can exhibit high dust recovery performance. In addition, since it can be easily installed in the exhaust filter storage space of the existing exhaust path, expensive equipment investment and a large installation space are unnecessary, and a high-performance exhaust filter can be installed without modifying the existing exhaust equipment. can do.

Furthermore, since the exhaust filter 1 according to the embodiment of the present invention is an explosion-proof filter that does not use electricity, high safety can be ensured in exhaust containing combustible dust such as exhaust in a painting chamber.

As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. The embodiments described in the above drawings can be combined with each other as long as there is no particular contradiction or problem in the purpose, configuration, or the like. Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

Claims

An exhaust filter that is provided in an exhaust path provided with an exhaust fan and collects dust in the exhaust,
A plurality of cylindrical container-shaped dust collection cells arranged close to each other along a planar direction intersecting the cylindrical axis, and a partition plate that blocks exhaust while supporting the plurality of dust collection cells,
The dust collection cell is arranged so that its cylindrical axis direction is along the exhaust path,
Each of the dust collection cells
A guide channel provided on the outer peripheral side surface for guiding the exhaust gas along the circumferential direction;
An inflow opening that opens in the circumferential direction at the downstream end of the guide flow path, and allows exhaust to flow into the dust collection cell;
A centrifuge for centrifuging dust from the exhaust gas flowing in from the inlet;
An outlet for deriving the exhaust gas from which the dust has been separated and letting it flow out of the dust collection cell;
An exhaust filter, wherein the inlet is provided on the upstream side of the partition plate and the outlet is provided on the downstream side of the partition plate.
The exhaust filter according to claim 1, wherein the guide channel is formed by recessing a part of the outer peripheral side surface inwardly, and the amount of recess is gradually increased along the circumferential direction.
The guide channel and the inlet are arranged in multiple stages along the cylindrical axis direction of the dust collection cell, and the adjacent guide channels are partitioned by a wind guide wall. 2. The exhaust filter according to 2.
2. The exhaust according to claim 1, wherein a plurality of the guide flow paths and the inflow ports are provided along a circumferential direction, and the inflow ports are arranged at a wide gap with the adjacent dust collection cell. filter.
2. The exhaust interference space is provided on the downstream side of the partition plate to allow the exhaust gas flowing out from the outlet to interfere with each other to drop and deposit dust remaining on the partition plate. Exhaust filter.