WO2014024817A1 - Bag filter air amplification device and bag filter air amplification system using said bag filter air amplification device - Google Patents

Bag filter air amplification device and bag filter air amplification system using said bag filter air amplification device Download PDF

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Publication number
WO2014024817A1
WO2014024817A1 PCT/JP2013/071106 JP2013071106W WO2014024817A1 WO 2014024817 A1 WO2014024817 A1 WO 2014024817A1 JP 2013071106 W JP2013071106 W JP 2013071106W WO 2014024817 A1 WO2014024817 A1 WO 2014024817A1
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WIPO (PCT)
Prior art keywords
air
compressed air
bag filter
compressed
inclined surface
Prior art date
Application number
PCT/JP2013/071106
Other languages
French (fr)
Japanese (ja)
Inventor
勝 實川
洋一 中里
永治郎 向
遼 戎崎
Original Assignee
アクロス商事株式会社
電気化学工業株式会社
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Application filed by アクロス商事株式会社, 電気化学工業株式会社 filed Critical アクロス商事株式会社
Priority to JP2014529481A priority Critical patent/JP6111485B2/en
Publication of WO2014024817A1 publication Critical patent/WO2014024817A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles

Definitions

  • the present invention relates to an air amplifier for a bag filter. More specifically, the present invention relates to a bag filter air amplifying device used for bag filter backwashing and a bag filter air amplifying system using the bag filter air amplifying device.
  • bag filters filter cloth type dust collectors
  • a bag filter is one of filtration dust collectors, and is a device that uses a woven fabric or a nonwoven fabric as a filter medium and makes it cylindrical to remove dust or collect powder.
  • Patent Document 1 includes a cleaning circuit that selectively connects a dust-containing air chamber and a purified air chamber.
  • the circuit includes a toxic gas removing member, a heater, and a hot air circulation fan, and purified air.
  • a filter cloth type dust collector that allows an operator to enter and allows the filter cloth to be taken out easily.
  • the filter cloth type dust collector of Patent Document 1 includes a reverse injection pipe that feeds compressed air (reference numeral 12 in FIG. 1 of Patent Document 1) and a nozzle that injects compressed air (reference numeral 13 in FIG. 1 of Patent Document 1). It is designed so that backwashing can be performed.
  • the compressed air injected from the nozzle uses a venturi, it flows while spreading toward the side of the filter, so there is also the problem of damaging the side of the filter by repeating backwashing many times. there were. Further, when a long filter is used, there is a problem that the compressed air does not reach the bottom surface of the filter, and the backwashing effect is lowered at the lower part of the filter. In addition, since the venturi is attached, the intake air flow path is narrowed by the throttle portion, and there is a problem that air resistance increases and pressure loss occurs when backwashing is not performed.
  • bag filters have been backwashed using an air amplifying device having a Coanda effect. Since air for backwashing is jetted from the air amplifying device having the Coanda effect almost parallel to the side of the filter, dust and powder adhering to the filter can be removed without damaging the side of the filter. Can do.
  • Patent Document 2 discloses a Coanda injector in which an inlet for pressurized air and an inlet for external air are arranged on the same plane in order to reduce pressure loss due to a change in the path of pressurized air. ing.
  • Patent Document 3 a pipe for supplying compressed air is divided into two branch pipes, and an air amplifier is connected to the upper part of the branch pipe, and the peripheral equipment is obstructed by the air pressure amplified from the air amplifier.
  • a compressed air injection device using an air amplifier that can uniformly supply a larger amount of ambient air to a bag filter at a higher speed so as to exhibit a high dust removal effect.
  • the main object of the present invention is to provide an air amplifying device excellent in air amplifying efficiency and suitable for backwashing a bag filter.
  • the present inventor has conducted intensive research on the specific structure of the air amplifying device for improving the air amplifying efficiency, and as a result, has determined that the injection direction of the compressed air is important.
  • the present invention has been completed.
  • an air amplifier used for backwashing a bag filter An R-shaped inclined surface that spreads outward, an external air induction port that is connected to the R-shaped inclined surface to attract external air, an amplified air discharge port that discharges amplified air, and the external air attraction
  • An air amplifying part provided with a cylindrical side wall provided from the mouth to the amplified air discharge port; Compressed air introduction port for introducing compressed air, compressed air injection hole for injecting compressed air to the air amplifying unit, and a curve for guiding the compressed air introduced from the compressed air introduction port to the compressed air injection hole
  • a compressed air introduction part provided with a compressed air guide wall, Comprising at least The compressed air injection hole provides a bag filter air amplifying device provided in the external air inlet along the R-shaped inclined surface.
  • the injection angle of the compressed air to the air amplifying unit is smaller than 90 ° along the R-shaped inclined surface. It is injected at an angle.
  • the R-shaped inclined surface is formed by the compressed air guiding wall. Design in a covered state. Moreover, it is preferable to design so that the center of the compressed air introduction port is located outside the apex of the curve of the compressed air guide wall. Furthermore, it is preferable that the cross-sectional area of the amplified air discharge port is designed wider than the cross-sectional area of the external air induction port.
  • the side wall is expanded outward, thereby reducing the cross-sectional area of the amplified air discharge port of the external air induction port. It is preferable to design wider than the cross-sectional area.
  • the compressed air injection hole may be formed by a gap between the compressed air guide wall and the R-shaped inclined surface. At this time, it is preferable that a convex portion is formed on the inner wall surface of the compressed air guide wall toward the R-shaped inclined surface. It is more preferable that the convex portion is provided along the flow direction of the compressed air.
  • the bag filter air amplifying device according to the present invention described above is suitable as an air amplifying system used for backwashing a bag filter by adding a compressed air introduction pipe for introducing compressed air to the compressed air introducing portion of the air amplifying device.
  • the bag filter air amplification system according to the present invention is not particularly limited as long as it has the bag filter air amplification device according to the present invention. It is preferable that the connection surface and the connection surface between the compressed air introduction part of the compressed air introduction pipe are formed in parallel to each other. Moreover, it is preferable that the connection part of the said compressed air introduction part and the said compressed air introduction pipe
  • FIG. 1 is a schematic perspective view schematically showing a first embodiment of a bag filter air amplifying device 1 according to the present invention. It is the cross-sectional schematic diagram which looked at 1st Embodiment of the air amplifier for bag filters 1 concerning this invention from the side surface. It is the cross-sectional schematic diagram which looked at 2nd Embodiment of the air amplifier for bag filters 1 concerning this invention from the side surface. It is the expanded cross-sectional schematic diagram which expanded the broken-line circle
  • FIG. 1 is a schematic perspective view schematically showing a first embodiment of an air amplifying device 1 for a bag filter according to the present invention.
  • FIG. 2 is a schematic cross-sectional view of the first embodiment of the bag filter air amplifying device 1 according to the present invention as viewed from the side.
  • the bag filter air amplifying device 1 is roughly divided into at least an air amplifying unit 11 and a compressed air introducing unit 12.
  • the air amplifying unit 11 includes an R-shaped inclined surface 111, an external air attracting port 112, an amplified air discharge port 113, and a side wall 114.
  • the compressed air introducing unit 12 includes a compressed air introducing port 121, A compressed air injection hole 122 and a compressed air guide wall 123 are provided.
  • each part will be described in detail.
  • Air amplifier 11 The air amplifying unit 11 is a part that amplifies air using the Coanda effect by the compressed air injected from the compressed air introducing unit 12 described later.
  • the R-shaped inclined surface 111 takes a form of expanding outward in order to guide the external air to the external air inlet 112 described later.
  • Specific aspects such as the size and inclination angle of the R-shaped inclined surface 111 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the target bag filter or the like.
  • the external air induction port 112 is connected to the R-shaped inclined surface 111 and is a part that attracts external air.
  • the opening area and the opening shape of the external air inlet 112 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the size of the filter cloth used for the target bag filter. As an example, for example, when the diameter of the filter cloth of the bag filter is about 150 mm, the external air inlet 112 can be designed with an inner diameter of 70 to 80 mm.
  • the amplified air discharge port 113 is a portion that discharges the amplified air toward the bag filter.
  • the opening area and opening shape of the amplified air discharge port 113 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the size of the filter cloth used for the target bag filter. For example, when the diameter of the filter cloth of the bag filter is about 150 mm, the amplified air discharge port 113 can be designed with an inner diameter of 70 to 80 mm.
  • the external air inlet 112 and the amplified air outlet 113 are designed to have the same opening area and shape (see, for example, Patent Document 3 FIG. 3).
  • the external air inlet 112 and the amplified air outlet 113 can be designed to have the same opening area and opening shape as in the prior art.
  • the inventor of the present application has found that the air amplification efficiency is further improved by designing the cross-sectional area of the amplified air discharge port 113 wider than the cross-sectional area of the external air induction port 112.
  • the cross-sectional area of the amplified air discharge port 113 As a method for designing the cross-sectional area of the amplified air discharge port 113 to be wider than the cross-sectional area of the external air induction port 112, there is a method of expanding a predetermined portion of the side wall 114 described later outward. At this time, it is preferable to widen the side wall 114 outward at a portion where the Coanda effect by the compressed air injected from the compressed air injection hole 122 is at least maintained (see W in FIG. 3).
  • the air amplification efficiency can be reliably improved by spreading the side wall 114 outward at a portion where the Coanda effect is maintained at least.
  • the side wall 114 is provided from the external air induction port 112 to the amplified air discharge port 113, and includes external air attracted from the external air induction port 112 and compressed air injected from a compressed air injection hole 122 described later. In order to guide to the amplified air outlet 113, it has a cylindrical shape. Specific aspects such as the length of the side wall 114 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed in accordance with the target bag filter or the like.
  • the compressed air introduction part 12 is a part for introducing the compressed air sent from the compressed air introduction pipe 2 to be described later into the bag filter air amplifying apparatus 1 according to the present invention.
  • the compressed air introduction port 121 is a part for introducing the compressed air sent from the compressed air introduction pipe 2 described later into the compressed air introduction unit 12.
  • the specific aspects such as the opening area and the opening shape of the compressed air inlet 121 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely selected according to the target bag filter or the form of the compressed air inlet pipe 2 to be connected. Can be designed to
  • the compressed air injection hole 122 is a part for injecting the compressed air introduced from the compressed air introduction port 121 to the air amplifying unit 11.
  • the bag filter air amplifying device 1 according to the present invention is characterized in that the compressed air injection hole 122 is provided in the external air inlet 112 along the R-shaped inclined surface 111.
  • the compressed air injection hole is provided outside the R-shaped inclined surface. That is, when injecting compressed air to the air amplifying unit in order to generate the Coanda effect, it has been common knowledge that the injection angle from the compressed air inlet is designed to be perpendicular to the direction in which external air is attracted (for example, Patent Document 3 FIG. 3 code (3), specification paragraph number 0022). However, the idea is changed from the common sense in the prior art, and in the air amplifying device 1 for bag filter according to the present invention, the compressed air injection hole 122 is provided in the external air inlet 112 along the R-shaped inclined surface 111. It is characterized by that.
  • the injection angle of the compressed air from the compressed air introduction port 121 to the air amplifying unit 11 is injected along the R-shaped inclined surface 111 at an angle smaller than 90 ° with respect to the attracting direction of the external air. It is characterized by.
  • the injection angle of the compressed air from the compressed air introduction port 121 to the air amplifying unit 11 is injected along the R-shaped inclined surface 111 at an angle smaller than 90 ° with respect to the direction in which the external air is attracted.
  • the compressed air injection hole 122 can be formed by a gap between a compressed air guide wall 123 described later and the R-shaped inclined surface 111.
  • the width of the gap forming the compressed air injection hole 122 is not particularly limited as long as the effect of the present invention is not impaired, and can be freely designed according to the amount of compressed air introduced, the target ejection speed, and the like.
  • a gap for forming the compressed air injection hole 122 with a width of 0.3 to 2 mm can be designed.
  • FIG. 4 is an enlarged schematic cross-sectional view of an enlarged broken-line circle portion of the second embodiment of the bag filter air amplifying device 1 according to the present invention shown in FIG.
  • the compressed air injection hole 122 can be formed, for example, by providing a plurality of convex portions T toward the R-shaped inclined surface 111 at predetermined intervals on the inner wall surface of a compressed air guide wall 123 described later. At this time, it is possible to freely adjust the width of the compressed air injection hole 122 by changing the height of the convex portion T.
  • the specific forms such as the size and shape are not particularly limited as long as the effects of the present invention are not impaired, and can be freely selected according to the amount of compressed air to be introduced, the target ejection speed, and the like. Can be designed.
  • FIG. 5 is a schematic plan view of a third embodiment of the bag filter air amplifying device 1 according to the present invention as viewed from the bottom side.
  • the convex part T is provided along the flow direction of compressed air.
  • the convex portion T rectifies the compressed air introduced from the compressed air introduction port 121 and guides it to the compressed air injection hole 122. It is also possible to provide a rectifying action.
  • the compressed air guide wall 123 has a curved shape in order to guide the compressed air introduced from the compressed air introduction port 121 to the compressed air injection hole 122.
  • a specific form of the compressed air guide wall 123 is not limited as long as it has at least a curved shape in order to guide the compressed air introduced from the compressed air introduction port 121 to the compressed air injection hole 122.
  • the other structure is not particularly limited as long as the above effect is not impaired, and the structure can be freely designed according to the target bag filter or the form of the compressed air introduction pipe 2 to be connected.
  • the compressed air guide wall 123 is designed so as to cover the R-shaped inclined surface 111, so that fine dust or powder that has passed through the filter can be obtained. Is attached and buried outside (upper part) of the compressed air guide wall 123. That is, dust and powder are not attached or buried on the R-shaped inclined surface 111. Therefore, the compressed air injection from the compressed air injection hole 122 is not hindered, and a stable Coanda effect can be produced in the long term. As a result, an excellent air amplification effect stable in the long term is maintained. can do. It should be noted that the dust and powder adhering to and buried in the outside (upper part) of the compressed air guide wall 123 may be removed by periodically wiping or sucking.
  • the conventional bag filter air amplifying apparatus is designed so that the center of the compressed air inlet is located on the same line as the apex of the curve of the compressed air guiding wall (for example, see Patent Document 3 FIG. 3). reference).
  • the center of the compressed air inlet 121 is designed to be located on the same line as the curved apex of the compressed air guiding wall 123, as in the prior art.
  • the compressed air introduced from the compressed air inlet 121 collides with the compressed air guide wall 123 by making the center of the compressed air inlet 121 outside the apex of the curve of the compressed air guide wall 123, the compressed air is compressed. Air is guided toward the apex of the curve at a higher position, and can be prevented from flowing in the direction opposite to the compressed air injection hole 122. As a result, the compressed air introduced from the compressed air introduction port 121 can be guided to the compressed air injection hole 122 in a state where the compression loss is minimized.
  • FIG. 6 is a schematic cross-sectional view of the first embodiment of the bag filter air amplification system 10 according to the present invention as viewed from the side.
  • the bag filter air amplifying system 10 according to the present invention includes at least the bag filter air amplifying apparatus 1 according to the present invention and the compressed air introduction pipe 2 described above.
  • the bag filter air amplifying system 10 according to the present invention may include a fixing means 3.
  • each part will be described in detail.
  • the details of the bag filter air amplifying device 1 according to the present invention are the same as those described above, and therefore the description thereof is omitted here.
  • Compressed air introduction pipe 2 The compressed air introduction pipe 2 introduces compressed air into the compressed air introduction part 12 of the air amplifying device 1.
  • the specific form such as the thickness and length of the compressed air introduction pipe 2 is not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the target bag filter, the form of the installation location, and the like. it can.
  • the arrangement of the compressed air introduction pipe 2 is not particularly limited as long as the effect of the present invention is not impaired, and can be freely designed according to the form of the installation place.
  • the air amplifier 1 It is preferable to install in the lower part of the compressed air introduction part 12 so that it may communicate with this compressed air introduction part 12.
  • a compressed air introduction pipe above the external air inlet.
  • the air flow may be obstructed when the external air is attracted from the external air inlet, and the amount of air to be attracted may decrease. The effect may be reduced. Therefore, in the present invention, it is preferable to install the compressed air introduction pipe 2 below the compressed air introduction part 12.
  • the specific cross-sectional shape of the compressed air introduction pipe 2 is not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the form of the installation location.
  • connection surface of the compressed air introduction part 12 to the compressed air introduction pipe 2 and the compressed air introduction pipe 2 are
  • the connecting surface with the compressed air introduction portion 12 can be formed as a spherical surface.
  • This is the same connection surface as the conventional bag filter air amplification system.
  • the compressed air introduction part and the compressed air introduction pipe having a circular or elliptical cross section are connected by welding the outside (see C in FIG. 6).
  • a hole is provided in the spherical surface and connected, there is a problem that compressed air leaks from a connecting portion other than the welded portion C. This is one of the causes that cause a decrease in air amplification efficiency. It was.
  • connection surface of the compressed air introduction part 12 with the compressed air introduction pipe 2 and the compression of the compressed air introduction pipe 2 By designing the connection surface with the air introduction part 12 to be parallel to each other, leakage of compressed air can be prevented.
  • the compressed air introduction part 12 and the compressed air introduction pipe 2 can be connected by welding as in the second embodiment shown in FIG. 7, but as in the first embodiment shown in FIG. It is also possible to seal using the packing P. By connecting with the packing P, it becomes possible to easily remove the air amplifier 1 for bag filter from the compressed air introduction pipe 2, and it becomes necessary to replace the single item due to breakage or to urgently close the filter cloth hole. Etc.
  • the number of compressed air introduction pipes 2 provided in the bag filter air amplification system 10 according to the present invention is not particularly limited as long as the effects of the present invention are not impaired, and one or two according to the form of the installation location. It is also possible to provide more than one.
  • the number of compressed air introduction pipes 2 is particularly preferably one.
  • a plurality of compressed air introduction ports 121 are also provided.
  • the compressed air introduced from the plurality of compressed air introduction ports 121 is contained inside the compressed air introduction unit 12. In rare cases, the flow may interfere with each other. In this case, the injection speed of the compressed air from the compressed air injection hole 122 decreases, and as a result, the air amplification factor may be decreased.
  • the number of the compressed air introduction pipes 2 is one, it is possible to prevent a reduction in the compression rate of the air due to the branching of the pipes, and between the compressed air introduced inside the compressed air introduction section 12. Interference can be suppressed, and as a result, an excellent air amplification effect can be maintained.
  • FIG. 8 is a schematic perspective view schematically showing a third embodiment of the air amplification system 10 for a bag filter according to the present invention.
  • a compressed air guide plate 4 is provided at a connection portion between the compressed air introduction portion 12 and the compressed air introduction pipe 2.
  • the compressed air guide plate 4 is not essential in the present invention, but can be provided to guide the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction part 12.
  • the compressed air A is introduced into the compressed air introduction pipe 2 in one direction (see arrow A in FIG. 8), depending on the compression rate and introduction speed of the compressed air A, In some cases, the air may be introduced into the compressed air introduction section 12 along the flow. Further, in an actual site, since there are many cases where 8 to 9 apparatuses 1 are arranged in a lane, the compressed air introduction section 12 becomes more downstream in the introduction direction of the compressed air A in the compressed air introduction pipe 2. The amount and pressure of air introduced into the apparatus may increase, and it may be difficult to stably introduce the compressed air A to each device 1.
  • the compressed air guide plate 4 is provided at the connecting portion between the compressed air introduction part 12 and the compressed air introduction pipe 2, the compressed air is compressed to the compressed air introduction part 12 at an angle close to perpendicular to the compressed air introduction pipe 2. Air A can be introduced. Further, even when a plurality of devices 1 are arranged in one lane, the amount and pressure of compressed air A introduced into each device 1 can be kept constant, and the compressed air A can be stably introduced. .
  • the installation location of the compressed air guide plate 4 is particularly suitable if the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction section 12 can be guided at an angle close to the perpendicular to the compressed air introduction pipe 2. It is not limited. It can be installed upstream of the compressed air inlet 121 as in the third embodiment of FIG. 8, or is installed in the center of the compressed air inlet 121, for example, as in the fourth embodiment of FIG. It is also possible. Particularly in the present invention, in order to guide at an angle close to perpendicular to the compressed air introduction pipe 2, it is preferably installed upstream from the center of the compressed air introduction port 121, and the most upstream of the compressed air introduction port 121. More preferably, it is installed on the side.
  • the compressed air guide plate 4 can be installed in a state of protruding to the upper part of the compressed air introduction port 121 to such an extent that the air flow of the compressed air introduction unit 12 is not hindered.
  • the compressed air guide plate 4 may be installed in a state connected to the compressed air introduction pipe 2 side, may be installed in a state connected to the compressed air introduction part 12 side, or the compressed air introduction pipe 2. And you may install in the state connected to both the compressed air introduction parts 12.
  • FIG. 1 A block diagram illustrating an exemplary computing environment in accordance with the present disclosure.
  • the configuration of the compressed air guide plate 4 can also guide the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction section 12 at an angle close to the perpendicular to the compressed air introduction pipe 2.
  • it is not particularly limited, and can be freely designed according to the shape of the compressed air inlet 121, the installation location, and the like.
  • the compressed air guide plate 4 having a curved shape in an R shape is used. preferable.
  • the compressed air introduction port 121 when installing the compressed air guide plate 4 in the center part of the compressed air introduction port 121 like 4th Embodiment, although not shown in figure, the compressed air introduction port 121 is not shown. It is preferable to use an L-shaped compressed air guide plate 4 as a bottom surface.
  • FIG. 10 is the cross-sectional schematic diagram which looked at 5th Embodiment of the air amplification system 10 for bag filters based on this invention from the side surface.
  • the fixing means 3 which fixes the air amplification apparatus 1 is further provided.
  • the fixing means 3 is not essential in the present invention, but by providing the fixing means 3, the horizontality of the bag filter air amplifying device 1 can be maintained.
  • the bag filter air amplifying device 1 is supported only by the compressed air introduction pipe 2. As a result, the bag filter air amplifying device 1 may be inclined.
  • a fixing means 3 for fixing the air amplification device 1 is further provided as in the fifth embodiment of the bag filter air amplification system 10 according to the present invention shown in FIG.
  • the inclination of the air amplifying device 1 can be prevented and its horizontality can be maintained, and as a result, an excellent air amplifying effect can be maintained.
  • Example demonstrated below shows an example of the typical Example of this invention, and, thereby, the range of this invention is not interpreted narrowly.
  • Example 1 In Experimental Example 1, it was examined whether or not the efficiency of inflow of compressed air into the air amplifying unit and the air amplifying effect changed depending on the form of each part of the bag filter air amplifying device.
  • the air amplifier for a bag filter according to the present invention the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, and an example of a conventional bag filter air amplifier.
  • the inflow efficiency of compressed air into the air amplifier and the air amplification efficiency were compared using a single compressed air introduction pipe of the apparatus shown in FIG.
  • r position of the compressed air injection hole from the center of the air amplification part
  • s width of the compressed air injection hole (slit width)
  • the amount of outflow air when using the bag filter air amplification system according to Example 2 was increased by 20% from 0.456 kg / sec to 0.547 kg / sec, as compared with Comparative Example 1 which is a conventional product.
  • the outflow air amount was 0.595 kg / sec, an increase of 30%.
  • the compressed air inflow rate when using the bag filter air amplification system according to Examples 1 and 2 is also increased by 16% from 0.118 kg / sec to 0.137 kg / sec.
  • the air amplification system for a bag filter according to the present invention has a significant increase in not only the air amplification factor but also the inflow efficiency of compressed air as compared with the conventional product. That is, it was shown that the air amplification system for bag filters according to the present invention can realize a high air amplification effect with less compressed air than the conventional product.
  • Example 2 In Experimental Example 2, it was further investigated whether the inflow efficiency of compressed air into the air amplifying unit and the air amplifying effect were changed depending on the form of each part of the bag amplifying device.
  • the bag filter air amplifying device according to the present invention the second embodiment shown in FIG. 3, and as an example of a conventional bag filter air amplifying device, the device shown in FIG. It was used to compare the inflow efficiency of compressed air to the air amplifier and the air amplification efficiency.
  • Example 3 In Experimental Example 3, the change in the wind speed at the amplified air discharge port due to the difference in the form of each part of the air amplifier for bag filter, the difference in the inflow air pressure, the difference in the injection time and the injection interval was examined.
  • the bag filter air amplifying device according to the present invention the second embodiment shown in FIG. 3, and as an example of a conventional bag filter air amplifying device, the device shown in FIG. Using, the wind speed at the amplified air outlet was compared.
  • the devices of Example 4 and Comparative Example 3 the same devices as those of Example 3 and Comparative Example 2 used in Experimental Example 2 were used.
  • the experimental examples 1 to 3 described above are all results of one apparatus. Since there are many cases where 8 to 9 devices are arranged in one lane in an actual site, it is considered that there is a greater difference between the conventional product and the present invention than the result of this experimental example. That is, by using the air amplification system for bag filters according to the present invention, very high air amplification efficiency can be realized even in an actual site where 8 to 9 devices are connected in one lane, and as a result, the back washing effect of the filter is achieved. Can be improved.
  • the air amplification system for bag filter according to the present invention can realize a very high air amplification efficiency compared to the conventional product, and thus it is large (long) that a conventional backwashing effect cannot be obtained sufficiently. It is considered that it can be suitably used for a bag filter.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The present invention provides a bag filter air amplification device (1), which is an air amplification device that is used for backwashing of bag filters and is equipped at least with: an air-amplifying section (11) provided with an r-shaped inclined surface (111) that spreads towards the outside, an external air intake port (112) that is connected to the r-shaped inclined surface (111) and is for drawing in external air, an amplified air discharging port (113) for discharging the amplified air, and a cylindrical side wall (114) provided from the external air intake port (112) to the amplified air discharging port (113); and a compressed air-introducing section (12) provided with a compressed air-introducing port (121) for introducing compressed air, compressed air-jetting holes (122) for jetting the compressed air towards the air-amplifying section (11), and a curved compressed air-guiding wall (123) for guiding the compressed air introduced from the compressed air-introducing port (121) towards the compressed air-jetting holes (122). The compressed air-jetting holes (122) are provided along the r-shaped inclined surface (111) at the external air intake port (112).

Description

バグフィルター用空気増幅装置および該バグフィルター用空気増幅装置を用いたバグフィルター用空気増幅システムBag filter air amplifying device and bag filter air amplifying system using the bag filter air amplifying device
　本発明は、バグフィルター用空気増幅装置に関する。より詳しくは、バグフィルターの逆洗に用いるバグフィルター用空気増幅装置および該バグフィルター用空気増幅装置を用いたバグフィルター用空気増幅システムに関する。 The present invention relates to an air amplifier for a bag filter. More specifically, the present invention relates to a bag filter air amplifying device used for bag filter backwashing and a bag filter air amplifying system using the bag filter air amplifying device.
　従来から、焼却場や一般的な工場などにおける粉塵の除去や、紛体工場などにおける紛体の収集などに、バグフィルター（濾布式集塵機）が用いられている。バグフィルターは、濾過集塵装置の一つであり、濾材として織布や不織布を用い、これを円筒状にして粉塵の除去や紛体の収集などを行う装置である。 Conventionally, bag filters (filter cloth type dust collectors) have been used for dust removal at incinerators and general factories, and for dust collection at powder factories. A bag filter is one of filtration dust collectors, and is a device that uses a woven fabric or a nonwoven fabric as a filter medium and makes it cylindrical to remove dust or collect powder.
　例えば、特許文献１には、含塵空気室と浄化空気室とを選択して連結する清掃回路を設け、該回路には有毒ガス除去部材と加熱器及び温風循環ファンとを備え、浄化空気室内の空気を清掃回路を介して加熱して含塵空気室に導入し、循環して含塵空気室内を加熱し、該含塵空気室内の塵埃を有毒ガス除去部材により無害化することにより、作業者の立ち入りを可能とし、濾布の取り出し作業を容易に行うことを可能とした濾布式集塵機が開示されている。 For example, Patent Document 1 includes a cleaning circuit that selectively connects a dust-containing air chamber and a purified air chamber. The circuit includes a toxic gas removing member, a heater, and a hot air circulation fan, and purified air. By heating the indoor air through the cleaning circuit and introducing it into the dusty air chamber, circulating and heating the dusty air chamber, and detoxifying the dust in the dusty air chamber by the toxic gas removal member, There is disclosed a filter cloth type dust collector that allows an operator to enter and allows the filter cloth to be taken out easily.
　このようなバグフィルターでは、通常時には、吸引されてきた粉塵や紛体がフィルター（特許文献１の図１では符号１０）に付着し、粉塵や紛体を含有しない空気のみが排出される（特許文献１の図１では符号５側へ排出される）ことで、粉塵の除去や紛体の収集などが行われる。しかし、操業を続けていると、次第にフィルターに粉塵や紛体が付着し堆積することにより、フィルターの濾過効果が低下する。そこで、一定周期毎に、圧縮した空気をフィルターの濾過方向とは逆の方向から噴射し、フィルターに付着した粉塵や紛体を払落する、所謂、逆洗が行われている。 In such a bag filter, normally, dust and powder that have been sucked adhere to the filter (reference numeral 10 in FIG. 1 of Patent Document 1), and only air that does not contain dust or powder is discharged (Patent Document 1). 1 is discharged to the reference numeral 5 side), dust is removed and powder is collected. However, if the operation is continued, dust and powder gradually adhere to and accumulate on the filter, thereby reducing the filtering effect of the filter. Therefore, so-called backwashing is performed in which compressed air is sprayed from a direction opposite to the filtration direction of the filter at regular intervals, and dust and powder adhering to the filter are removed.
　例えば、特許文献１の濾布式集塵機は、圧縮空気を送り込む逆噴射パイプ（特許文献１の図１では符号１２）と、圧縮空気を噴射するノズル（特許文献１の図１では符号１３）とを用いて、逆洗を行うことができるように設計されている。 For example, the filter cloth type dust collector of Patent Document 1 includes a reverse injection pipe that feeds compressed air (reference numeral 12 in FIG. 1 of Patent Document 1) and a nozzle that injects compressed air (reference numeral 13 in FIG. 1 of Patent Document 1). It is designed so that backwashing can be performed.
　このように、従来から一般的に行われてきた逆洗方法では、噴射された圧縮空気が外気を誘引するために、ベンチュリー効果を使い理論上は少ない圧縮空気量でフィルターの洗浄が達成できる。しかし、実際には、ノズルとフィルターの芯合わせが難しく、少しでもずれると誘引空気量が大きく減ってしまい、設計通りの性能を発揮することができないという問題があった。 Thus, in the conventional backwashing method that has been generally performed, since the injected compressed air attracts outside air, the filter can be washed with a theoretically small amount of compressed air using the venturi effect. However, in reality, it is difficult to align the nozzle and the filter, and if they are slightly shifted, the amount of attracting air is greatly reduced, and there is a problem that the designed performance cannot be exhibited.
　また、ノズルから噴射された圧縮空気は、ベンチュリーを使用しているため、フィルターの側面に向かって広がりながら流れるので、何度も逆洗を繰り返すことで、フィルターの側面にダメージを与えるという問題もあった。更に、長いフィルターを用いる場合においては、フィルターの底面まで圧縮空気が届かず、フィルターの下部では逆洗効果が低下するという問題もあった。加えて、ベンチュリーが装着されているために、吸入空気流路が絞り部によって狭くなっており、逆洗浄しない時には、空気抵抗が増え圧力損失が発生するという問題もあった。 In addition, since the compressed air injected from the nozzle uses a venturi, it flows while spreading toward the side of the filter, so there is also the problem of damaging the side of the filter by repeating backwashing many times. there were. Further, when a long filter is used, there is a problem that the compressed air does not reach the bottom surface of the filter, and the backwashing effect is lowered at the lower part of the filter. In addition, since the venturi is attached, the intake air flow path is narrowed by the throttle portion, and there is a problem that air resistance increases and pressure loss occurs when backwashing is not performed.
　このような問題を解決するために、近年においては、コアンダ効果を有する空気増幅装置を用いてバグフィルターの逆洗を行うことが行われつつある。コアンダ効果を有する空気増幅装置からは、フィルターの側面とほぼ平行に逆洗用の空気が噴射されるため、フィルターの側面にダメージを与えることなく、フィルターに付着した粉塵や紛体を払落することができる。 In order to solve such problems, in recent years, bag filters have been backwashed using an air amplifying device having a Coanda effect. Since air for backwashing is jetted from the air amplifying device having the Coanda effect almost parallel to the side of the filter, dust and powder adhering to the filter can be removed without damaging the side of the filter. Can do.
　例えば、特許文献２には、加圧空気の経路変更による圧力損失を軽減するために、加圧空気の流入口と、外部空気の流入口とが同一平面上に配置されたコアンダインジェクターが開示されている。 For example, Patent Document 2 discloses a Coanda injector in which an inlet for pressurized air and an inlet for external air are arranged on the same plane in order to reduce pressure loss due to a change in the path of pressurized air. ing.
　また、特許文献３には、圧縮空気を供給する導管を２つの分岐管に分けて、その分岐管の上部に空気増幅器を共に連結して空気増幅器から増幅された空気の圧力によって周辺装備の障害なく、より多量の周辺空気をより早い速度でバグフィルターに均一に供給して高い脱塵効果が発揮できるようにした空気増幅器を利用した圧縮空気噴射装置が開示されている。 Further, in Patent Document 3, a pipe for supplying compressed air is divided into two branch pipes, and an air amplifier is connected to the upper part of the branch pipe, and the peripheral equipment is obstructed by the air pressure amplified from the air amplifier. There is also disclosed a compressed air injection device using an air amplifier that can uniformly supply a larger amount of ambient air to a bag filter at a higher speed so as to exhibit a high dust removal effect.
特開２００３－１２６６３７号公報JP 2003-126737 A 米国特許第６６０４６９４US Pat. No. 6,604,694 特開２００８－１１５８４７号公報JP 2008-115847 A
　前述のように、コアンダ効果を有する空気増幅装置を用いれば、逆噴射パイプとノズルを用いた従来の逆洗浄に比べ、高い逆洗浄効果を期待することができる。しかし、まだまだ空気増幅効率が十分でない空気増幅装置もあり、更なる開発が望まれていた。特に、バグフィルターは、通常、１レーンに８～９個連ねられている場合が多く、空気増幅器もまた、圧縮空気を送る１つの配管に８～９個連ねることになるが、１個では十分な空気増幅効率を有していても、複数連なると、その空気増幅効率が低下するという問題があった。 As described above, if an air amplifying device having a Coanda effect is used, a higher back cleaning effect can be expected as compared with a conventional back cleaning using a back injection pipe and a nozzle. However, there are still air amplifying devices that still have insufficient air amplification efficiency, and further development has been desired. In particular, 8 to 9 bag filters are usually connected to one lane, and 8 to 9 air amplifiers are also connected to one pipe for sending compressed air. Even if the air amplification efficiency is high, there is a problem that the air amplification efficiency decreases when a plurality of air amplification efficiency is provided.
　そこで、本発明では、空気増幅効率の優れた、バグフィルターの逆洗に適する空気増幅装置を提供することを主目的とする。 Therefore, the main object of the present invention is to provide an air amplifying device excellent in air amplifying efficiency and suitable for backwashing a bag filter.
　上記技術的課題を解決するために、本願発明者は空気増幅効率を向上させるための空気増幅装置の具体的な構造について鋭意研究を行った結果、圧縮空気の噴射方向が重要であることを突き止め、本発明を完成させるに至った。 In order to solve the above technical problem, the present inventor has conducted intensive research on the specific structure of the air amplifying device for improving the air amplifying efficiency, and as a result, has determined that the injection direction of the compressed air is important. The present invention has been completed.
　即ち、本発明では、まず、バグフィルターの逆洗に用いる空気増幅装置であって、
　外側へ向かって広がるＲ状傾斜面と、該Ｒ状傾斜面に連設して外部の空気を誘引する外部空気誘引口と、増幅された空気を排出する増幅空気排出口と、前記外部空気誘引口から前記増幅空気排出口へ渡って設けられた筒状の側壁と、が備えられた空気増幅部と、
　圧縮された空気を導入する圧縮空気導入口と、圧縮空気を前記空気増幅部へ噴射する圧縮空気噴射孔と、前記圧縮空気導入口から導入された圧縮空気を前記圧縮空気噴射孔へ誘導する湾曲状の圧縮空気誘導壁と、が備えられた圧縮空気導入部と、
　を少なくとも備え、
　前記圧縮空気噴射孔は、前記Ｒ状傾斜面に沿って前記外部空気誘引口に設けられたバグフィルター用空気増幅装置を提供する。
　従来のバグフィルター用空気増幅装置では、コアンダ効果を発生させるために圧縮空気を空気増幅部に噴射させる際、その噴射角度は、外部空気の誘引方向に対して垂直に設計することが常識であった（例えば、特許文献３図３符号（３）、明細書段落番号００２２参照）。しかし、従来技術における常識から発想を転換し、本発明に係るバグフィルター用空気増幅装置では、空気増幅部への圧縮空気の噴射角度は、前記Ｒ状傾斜面に沿って、９０°よりも小さい角度で噴射されることを特徴とする。
　本発明に係るバグフィルター用空気増幅装置では、前記圧縮空気噴射孔を、前記Ｒ状傾斜面に沿って前記外部空気誘引口に設けるために、前記Ｒ状傾斜面を、前記圧縮空気誘導壁で覆った状態に設計する。
　また、前記圧縮空気導入口の中心が、前記圧縮空気誘導壁の湾曲の頂点よりも外側に位置するように設計することが好ましい。
　更に、前記増幅空気排出口の断面面積を、前記外部空気誘引口の断面面積より広く設計することが好ましい。この場合、前記圧縮空気噴射孔から噴射される圧縮空気によるコアンダ効果が少なくとも持続される部位において、前記側壁を外側へ広げることで、前記増幅空気排出口の断面面積を、前記外部空気誘引口の断面面積より広く設計することが好ましい。
　本発明に係るバグフィルター用空気増幅装置では、前記圧縮空気噴射孔は、前記圧縮空気誘導壁と、前記Ｒ状傾斜面との間隙で形成することができる。この時、前記圧縮空気誘導壁の内壁面には、前記Ｒ状傾斜面へ向けて凸部を形成することが好ましい。この凸部は、圧縮空気の流動方向に沿って設けることが更に好ましい。 That is, in the present invention, first, an air amplifier used for backwashing a bag filter,
An R-shaped inclined surface that spreads outward, an external air induction port that is connected to the R-shaped inclined surface to attract external air, an amplified air discharge port that discharges amplified air, and the external air attraction An air amplifying part provided with a cylindrical side wall provided from the mouth to the amplified air discharge port;
Compressed air introduction port for introducing compressed air, compressed air injection hole for injecting compressed air to the air amplifying unit, and a curve for guiding the compressed air introduced from the compressed air introduction port to the compressed air injection hole A compressed air introduction part provided with a compressed air guide wall,
Comprising at least
The compressed air injection hole provides a bag filter air amplifying device provided in the external air inlet along the R-shaped inclined surface.
In the conventional bag filter air amplifying device, when the compressed air is injected to the air amplifying unit in order to generate the Coanda effect, it is common knowledge that the injection angle is designed to be perpendicular to the attracting direction of the external air. (For example, see Patent Document 3 FIG. 3 code (3), specification paragraph number 0022). However, the idea is changed from the common sense in the prior art, and in the air amplifying device for bag filter according to the present invention, the injection angle of the compressed air to the air amplifying unit is smaller than 90 ° along the R-shaped inclined surface. It is injected at an angle.
In the air amplifying device for a bag filter according to the present invention, in order to provide the compressed air injection hole in the external air inlet along the R-shaped inclined surface, the R-shaped inclined surface is formed by the compressed air guiding wall. Design in a covered state.
Moreover, it is preferable to design so that the center of the compressed air introduction port is located outside the apex of the curve of the compressed air guide wall.
Furthermore, it is preferable that the cross-sectional area of the amplified air discharge port is designed wider than the cross-sectional area of the external air induction port. In this case, in a portion where the Coanda effect by the compressed air injected from the compressed air injection hole is at least sustained, the side wall is expanded outward, thereby reducing the cross-sectional area of the amplified air discharge port of the external air induction port. It is preferable to design wider than the cross-sectional area.
In the bag filter air amplifying device according to the present invention, the compressed air injection hole may be formed by a gap between the compressed air guide wall and the R-shaped inclined surface. At this time, it is preferable that a convex portion is formed on the inner wall surface of the compressed air guide wall toward the R-shaped inclined surface. It is more preferable that the convex portion is provided along the flow direction of the compressed air.
　以上の本発明に係るバグフィルター用空気増幅装置は、前記空気増幅装置の前記圧縮空気導入部へ圧縮空気を導入する圧縮空気導入管を加えて、バグフィルターの逆洗に用いる空気増幅システムとして好適に用いることができる。
　本発明に係るバグフィルター用空気増幅システムは、本発明に係るバグフィルター用空気増幅装置を備えていれば、その他の構成は特に限定されないが、前記圧縮空気導入部の前記圧縮空気導入管との接続面と、前記圧縮空気導入管の前記圧縮空気導入部との接続面とを、互いに平行に形成することが好ましい。
　また、前記圧縮空気導入部と前記圧縮空気導入管との接続部は、パッキンにてシールすることが好ましい。
　更に、前記接続部には、前記圧縮空気導入管から前記圧縮空気導入部への圧縮空気の導入を誘導する圧縮空気誘導板を備えることが好ましい。
　加えて、前記空気増幅装置を固定する固定手段を備えることが好ましい。 The bag filter air amplifying device according to the present invention described above is suitable as an air amplifying system used for backwashing a bag filter by adding a compressed air introduction pipe for introducing compressed air to the compressed air introducing portion of the air amplifying device. Can be used.
The bag filter air amplification system according to the present invention is not particularly limited as long as it has the bag filter air amplification device according to the present invention. It is preferable that the connection surface and the connection surface between the compressed air introduction part of the compressed air introduction pipe are formed in parallel to each other.
Moreover, it is preferable that the connection part of the said compressed air introduction part and the said compressed air introduction pipe | tube is sealed with packing.
Furthermore, it is preferable that the connection portion includes a compressed air guide plate that guides introduction of compressed air from the compressed air introduction pipe to the compressed air introduction portion.
In addition, it is preferable that a fixing means for fixing the air amplifying device is provided.
　本発明によれば、コアンダ効果を有する従来の空気増幅装置に比べ、空気増幅効率を飛躍的に向上させることが可能である。 According to the present invention, it is possible to dramatically improve the air amplification efficiency as compared with the conventional air amplification device having the Coanda effect.
本発明に係るバグフィルター用空気増幅装置１の第１実施形態を模式的に示す模式斜視図である。1 is a schematic perspective view schematically showing a first embodiment of a bag filter air amplifying device 1 according to the present invention. 本発明に係るバグフィルター用空気増幅装置１の第１実施形態を側面から視た断面模式図である。It is the cross-sectional schematic diagram which looked at 1st Embodiment of the air amplifier for bag filters 1 concerning this invention from the side surface. 本発明に係るバグフィルター用空気増幅装置１の第２実施形態を側面から視た断面模式図である。It is the cross-sectional schematic diagram which looked at 2nd Embodiment of the air amplifier for bag filters 1 concerning this invention from the side surface. 図３に示す本発明に係るバグフィルター用空気増幅装置１の第２実施形態の破線円部分を、拡大した拡大断面模式図である。It is the expanded cross-sectional schematic diagram which expanded the broken-line circle | round | yen part of 2nd Embodiment of the air amplification apparatus 1 for bag filters which concerns on this invention shown in FIG. 本発明に係るバグフィルター用空気増幅装置１の第３実施形態を、底部側から視た平面模式図である。It is the plane schematic diagram which looked at 3rd Embodiment of the air amplification apparatus 1 for bag filters which concerns on this invention from the bottom part side. 本発明に係るバグフィルター用空気増幅システム１０の第１実施形態を側面から視た断面模式図である。It is the cross-sectional schematic diagram which looked at 1st Embodiment of the air amplification system 10 for bag filters which concerns on this invention from the side surface. 本発明に係るバグフィルター用空気増幅システム１０の第２実施形態を側面から視た断面模式図である。It is the cross-sectional schematic diagram which looked at 2nd Embodiment of the air amplification system 10 for bag filters which concerns on this invention from the side surface. 本発明に係るバグフィルター用空気増幅システム１０の第３実施形態を模式的に示す模式斜視図である。It is a model perspective view which shows typically 3rd Embodiment of the air amplification system 10 for bag filters which concerns on this invention. 本発明に係るバグフィルター用空気増幅システム１０の第４実施形態を模式的に示す模式斜視図である。It is a model perspective view which shows typically 4th Embodiment of the air amplification system 10 for bag filters which concerns on this invention. 本発明に係るバグフィルター用空気増幅システム１０の第５実施形態を側面から視た断面模式図である。It is the cross-sectional schematic diagram which looked at 5th Embodiment of the air amplification system 10 for bag filters which concerns on this invention from the side surface.
　以下、本発明を実施するための好適な形態について図面を参照としながら説明する。なお、以下に説明する実施形態は、本発明の代表的な実施形態の一例を示したものであり、これにより本発明の範囲が狭く解釈されることはない。 Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. In addition, embodiment described below shows an example of typical embodiment of this invention, and, thereby, the range of this invention is not interpreted narrowly.
　＜１．バグフィルター用空気増幅装置１＞
　図１は、本発明に係るバグフィルター用空気増幅装置１の第１実施形態を模式的に示す模式斜視図である。図２は、本発明に係るバグフィルター用空気増幅装置１の第１実施形態を、側面から視た断面模式図である。 <1. Bag Filter Air Amplifier 1>
FIG. 1 is a schematic perspective view schematically showing a first embodiment of an air amplifying device 1 for a bag filter according to the present invention. FIG. 2 is a schematic cross-sectional view of the first embodiment of the bag filter air amplifying device 1 according to the present invention as viewed from the side.
　本発明に係るバグフィルター用空気増幅装置１は、大別して、空気増幅部１１と、圧縮空気導入部１２と、を少なくとも備える。そして、空気増幅部１１は、Ｒ状傾斜面１１１と、外部空気誘引口１１２と、増幅空気排出口１１３と、側壁１１４と、を備え、圧縮空気導入部１２は、圧縮空気導入口１２１と、圧縮空気噴射孔１２２と、圧縮空気誘導壁１２３と、を備える。以下、各部について、詳細に説明する。 The bag filter air amplifying device 1 according to the present invention is roughly divided into at least an air amplifying unit 11 and a compressed air introducing unit 12. The air amplifying unit 11 includes an R-shaped inclined surface 111, an external air attracting port 112, an amplified air discharge port 113, and a side wall 114. The compressed air introducing unit 12 includes a compressed air introducing port 121, A compressed air injection hole 122 and a compressed air guide wall 123 are provided. Hereinafter, each part will be described in detail.
　（１）空気増幅部１１
　空気増幅部１１は、後述する圧縮空気導入部１２から噴射された圧縮空気によるコアンダ効果を利用して、空気を増幅させる部分である。 (1) Air amplifier 11
The air amplifying unit 11 is a part that amplifies air using the Coanda effect by the compressed air injected from the compressed air introducing unit 12 described later.
　　（ａ）Ｒ状傾斜面１１１
　Ｒ状傾斜面１１１は、後述する外部空気誘引口１１２へ、外部空気を誘導するために、外側へ向かって広がった形態を呈する。Ｒ状傾斜面１１１の大きさ、傾斜角度などの具体的態様は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルターなどに合わせて自由に設計することができる。 (A) R-shaped inclined surface 111
The R-shaped inclined surface 111 takes a form of expanding outward in order to guide the external air to the external air inlet 112 described later. Specific aspects such as the size and inclination angle of the R-shaped inclined surface 111 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the target bag filter or the like.
　　（ｂ）外部空気誘引口１１２
　外部空気誘引口１１２は、Ｒ状傾斜面１１１に連設されており、外部の空気を誘引する部分である。外部空気誘引口１１２の開口面積や開口形状は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルターに用いる濾布の大きさなどに合わせて自由に設計することができる。一例を挙げると、例えば、バグフィルターの濾布の直径が１５０ｍｍ程度の場合、内径７０～８０ｍｍに外部空気誘引口１１２を設計することができる。 (B) External air inlet 112
The external air induction port 112 is connected to the R-shaped inclined surface 111 and is a part that attracts external air. The opening area and the opening shape of the external air inlet 112 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the size of the filter cloth used for the target bag filter. As an example, for example, when the diameter of the filter cloth of the bag filter is about 150 mm, the external air inlet 112 can be designed with an inner diameter of 70 to 80 mm.
　　（ｃ）増幅空気排出口１１３
　増幅空気排出口１１３は、増幅された空気をバグフィルターへ向かって排出する部分である。増幅空気排出口１１３の開口面積や開口形状は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルターに用いる濾布の大きさなどに合わせて自由に設計することができる。一例を挙げると、例えば、バグフィルターの濾布の直径が１５０ｍｍ程度の場合、内径７０～８０ｍｍに増幅空気排出口１１３を設計することができる。 (C) Amplified air outlet 113
The amplified air discharge port 113 is a portion that discharges the amplified air toward the bag filter. The opening area and opening shape of the amplified air discharge port 113 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the size of the filter cloth used for the target bag filter. For example, when the diameter of the filter cloth of the bag filter is about 150 mm, the amplified air discharge port 113 can be designed with an inner diameter of 70 to 80 mm.
　従来のバグフィルター用空気増幅装置では、外部空気誘引口１１２と増幅空気排出口１１３は、同一の開口面積および開口形状に設計されていた（例えば、特許文献３図３参照）。本発明に係るバグフィルター用空気増幅装置１においても、従来と同様に、外部空気誘引口１１２と増幅空気排出口１１３を、同一の開口面積および開口形状に設計することも可能であるが、図３に示す第２実施形態のように、増幅空気排出口１１３の断面面積を、外部空気誘引口１１２の断面面積より広く設計することが好ましい。増幅空気排出口１１３の断面面積を、外部空気誘引口１１２の断面面積より広く設計することで、空気増幅効率が更に向上することを、本願発明者が突き止めた。 In the conventional bag filter air amplifying device, the external air inlet 112 and the amplified air outlet 113 are designed to have the same opening area and shape (see, for example, Patent Document 3 FIG. 3). In the air amplifying device 1 for bag filter according to the present invention, the external air inlet 112 and the amplified air outlet 113 can be designed to have the same opening area and opening shape as in the prior art. As in the second embodiment shown in FIG. 3, it is preferable to design the cross-sectional area of the amplified air discharge port 113 to be wider than the cross-sectional area of the external air induction port 112. The inventor of the present application has found that the air amplification efficiency is further improved by designing the cross-sectional area of the amplified air discharge port 113 wider than the cross-sectional area of the external air induction port 112.
　増幅空気排出口１１３の断面面積を、外部空気誘引口１１２の断面面積より広く設計する方法としては、後述する側壁１１４の所定部分を外側へ広げる方法がある。この際、圧縮空気噴射孔１２２から噴射される圧縮空気によるコアンダ効果が少なくとも持続される部位において、側壁１１４を外側へ広げることが好ましい（図３符号Ｗ参照）。コアンダ効果が少なくとも持続される部位において、側壁１１４を外側へ広げることで、確実に、空気増幅効率を向上させることができる。 As a method for designing the cross-sectional area of the amplified air discharge port 113 to be wider than the cross-sectional area of the external air induction port 112, there is a method of expanding a predetermined portion of the side wall 114 described later outward. At this time, it is preferable to widen the side wall 114 outward at a portion where the Coanda effect by the compressed air injected from the compressed air injection hole 122 is at least maintained (see W in FIG. 3). The air amplification efficiency can be reliably improved by spreading the side wall 114 outward at a portion where the Coanda effect is maintained at least.
　　（ｄ）側壁１１４
　側壁１１４は、外部空気誘引口１１２から増幅空気排出口１１３へ渡って設けられ、外部空気誘引口１１２から誘引された外部空気と、後述する圧縮空気噴射孔１２２から噴射された圧縮空気と、を増幅空気排出口１１３へ誘導するために、筒状を呈する。側壁１１４の長さなどの具体的態様は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルターなどに合わせて自由に設計することができる。 (D) Side wall 114
The side wall 114 is provided from the external air induction port 112 to the amplified air discharge port 113, and includes external air attracted from the external air induction port 112 and compressed air injected from a compressed air injection hole 122 described later. In order to guide to the amplified air outlet 113, it has a cylindrical shape. Specific aspects such as the length of the side wall 114 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed in accordance with the target bag filter or the like.
　（２）圧縮空気導入部１２
　圧縮空気導入部１２は、後述する圧縮空気導入管２から送られてくる圧縮空気を、本発明に係るバグフィルター用空気増幅装置１の内部へ導入するための部位である。 (2) Compressed air introduction part 12
The compressed air introduction part 12 is a part for introducing the compressed air sent from the compressed air introduction pipe 2 to be described later into the bag filter air amplifying apparatus 1 according to the present invention.
　　（ａ）圧縮空気導入口１２１
　圧縮空気導入口１２１は、後述する圧縮空気導入管２から送られてくる圧縮空気を、圧縮空気導入部１２の内部へ導入するための部位である。圧縮空気導入口１２１の開口面積や開口形状など具体的な態様は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルターや接続する圧縮空気導入管２の形態などに合わせて自由に設計することができる。 (A) Compressed air inlet 121
The compressed air introduction port 121 is a part for introducing the compressed air sent from the compressed air introduction pipe 2 described later into the compressed air introduction unit 12. The specific aspects such as the opening area and the opening shape of the compressed air inlet 121 are not particularly limited as long as the effects of the present invention are not impaired, and can be freely selected according to the target bag filter or the form of the compressed air inlet pipe 2 to be connected. Can be designed to
　　（ｂ）圧縮空気噴射孔１２２
　圧縮空気噴射孔１２２は、圧縮空気導入口１２１から導入された圧縮空気を、空気増幅部１１へ噴射するための部位である。本発明に係るバグフィルター用空気増幅装置１では、この圧縮空気噴射孔１２２が、Ｒ状傾斜面１１１に沿って外部空気誘引口１１２に設けられていることを特徴とする。 (B) Compressed air injection hole 122
The compressed air injection hole 122 is a part for injecting the compressed air introduced from the compressed air introduction port 121 to the air amplifying unit 11. The bag filter air amplifying device 1 according to the present invention is characterized in that the compressed air injection hole 122 is provided in the external air inlet 112 along the R-shaped inclined surface 111.
　従来のバグフィルター用空気増幅装置では、圧縮空気噴射孔は、Ｒ状傾斜面より外側に設けられていた。即ち、コアンダ効果を発生させるために圧縮空気を空気増幅部に噴射させる際、圧縮空気導入口からの噴射角度は、外部空気の誘引方向に対して垂直に設計することが常識であった（例えば、特許文献３図３符号（３）、明細書段落番号００２２参照）。しかし、従来技術における常識から発想を転換し、本発明に係るバグフィルター用空気増幅装置１では、圧縮空気噴射孔１２２が、Ｒ状傾斜面１１１に沿って外部空気誘引口１１２に設けられていることを特徴とする。即ち、圧縮空気導入口１２１から空気増幅部１１への圧縮空気の噴射角度は、前記Ｒ状傾斜面１１１に沿って、外部空気の誘引方向に対して９０°よりも小さい角度で噴射されることを特徴とする。このように、圧縮空気導入口１２１から空気増幅部１１への圧縮空気の噴射角度は、前記Ｒ状傾斜面１１１に沿って、外部空気の誘引方向に対して９０°よりも小さい角度で噴射されることにより、従来のバグフィルター用空気増幅装置に比べ、空気増幅効率を飛躍的に向上させることに成功した。 In the conventional air amplifier for bag filter, the compressed air injection hole is provided outside the R-shaped inclined surface. That is, when injecting compressed air to the air amplifying unit in order to generate the Coanda effect, it has been common knowledge that the injection angle from the compressed air inlet is designed to be perpendicular to the direction in which external air is attracted (for example, Patent Document 3 FIG. 3 code (3), specification paragraph number 0022). However, the idea is changed from the common sense in the prior art, and in the air amplifying device 1 for bag filter according to the present invention, the compressed air injection hole 122 is provided in the external air inlet 112 along the R-shaped inclined surface 111. It is characterized by that. That is, the injection angle of the compressed air from the compressed air introduction port 121 to the air amplifying unit 11 is injected along the R-shaped inclined surface 111 at an angle smaller than 90 ° with respect to the attracting direction of the external air. It is characterized by. Thus, the injection angle of the compressed air from the compressed air introduction port 121 to the air amplifying unit 11 is injected along the R-shaped inclined surface 111 at an angle smaller than 90 ° with respect to the direction in which the external air is attracted. As a result, it succeeded in dramatically improving the air amplification efficiency as compared with the conventional bag filter air amplification device.
　圧縮空気噴射孔１２２は、後述する圧縮空気誘導壁１２３と、Ｒ状傾斜面１１１との間隙で形成することができる。圧縮空気噴射孔１２２を形成する間隙の幅は、本発明の効果を損なわない限り特に限定されず、導入される圧縮空気の量や目的の噴出速度などに合わせて自由に設計することができる。一例を挙げると、例えば、幅０．３～２ｍｍに圧縮空気噴射孔１２２を形成する間隙を設計することができる。本発明に係るバグフィルター用空気増幅装置１の圧縮空気噴射孔１２２からは、超音速で圧縮空気が噴射される。この空気の噴射によって、外部空気誘引口１１２付近にはコアンダ効果が発生し、空気増幅部１１へ外部空気が誘引される。その結果、非常に高効率で空気を増幅させることが可能である。 The compressed air injection hole 122 can be formed by a gap between a compressed air guide wall 123 described later and the R-shaped inclined surface 111. The width of the gap forming the compressed air injection hole 122 is not particularly limited as long as the effect of the present invention is not impaired, and can be freely designed according to the amount of compressed air introduced, the target ejection speed, and the like. For example, a gap for forming the compressed air injection hole 122 with a width of 0.3 to 2 mm can be designed. From the compressed air injection hole 122 of the bag filter air amplifying device 1 according to the present invention, compressed air is injected at supersonic speed. By this air injection, a Coanda effect is generated in the vicinity of the external air attracting port 112, and external air is attracted to the air amplifying unit 11. As a result, it is possible to amplify air with very high efficiency.
　図４は、図３に示す本発明に係るバグフィルター用空気増幅装置１の第２実施形態の破線円部分を、拡大した拡大断面模式図である。圧縮空気噴射孔１２２は、例えば、後述する圧縮空気誘導壁１２３の内壁面に、Ｒ状傾斜面１１１へ向けた凸部Ｔを所定間隔で複数設けることで、形成することができる。この際、この凸部Ｔの高さを変更することで、圧縮空気噴射孔１２２の幅を、自由に調整することも可能である。 FIG. 4 is an enlarged schematic cross-sectional view of an enlarged broken-line circle portion of the second embodiment of the bag filter air amplifying device 1 according to the present invention shown in FIG. The compressed air injection hole 122 can be formed, for example, by providing a plurality of convex portions T toward the R-shaped inclined surface 111 at predetermined intervals on the inner wall surface of a compressed air guide wall 123 described later. At this time, it is possible to freely adjust the width of the compressed air injection hole 122 by changing the height of the convex portion T.
　凸部Ｔを設ける場合、その大きさや形状などの具体的な形態は、本発明の効果を損なわない限り特に限定されず、導入される圧縮空気の量や目的の噴出速度などに合わせて自由に設計することができる。 When providing the convex part T, the specific forms such as the size and shape are not particularly limited as long as the effects of the present invention are not impaired, and can be freely selected according to the amount of compressed air to be introduced, the target ejection speed, and the like. Can be designed.
　図５は、本発明に係るバグフィルター用空気増幅装置１の第３実施形態を、底部側から視た平面模式図である。第３実施形態では、凸部Ｔを、圧縮空気の流動方向に沿って設けている。このように、凸部Ｔを圧縮空気の流動方向に沿って設けることで、凸部Ｔに、圧縮空気導入口１２１から導入された圧縮空気を整流させて圧縮空気噴射孔１２２へと導くための整流作用を付与することも可能である。 FIG. 5 is a schematic plan view of a third embodiment of the bag filter air amplifying device 1 according to the present invention as viewed from the bottom side. In 3rd Embodiment, the convex part T is provided along the flow direction of compressed air. Thus, by providing the convex portion T along the flow direction of the compressed air, the convex portion T rectifies the compressed air introduced from the compressed air introduction port 121 and guides it to the compressed air injection hole 122. It is also possible to provide a rectifying action.
　　（ｃ）圧縮空気誘導壁１２３
　圧縮空気誘導壁１２３は、圧縮空気導入口１２１から導入された圧縮空気を、圧縮空気噴射孔１２２へ誘導するために、湾曲状の形態を成す。圧縮空気誘導壁１２３の具体的な形態は、圧縮空気導入口１２１から導入された圧縮空気を、圧縮空気噴射孔１２２へ誘導するために、少なくとも湾曲状の形態を成していれば、本発明の効果を損なわない限りその他の構造は特に限定されず、目的のバグフィルターや接続する圧縮空気導入管２の形態などに合わせて自由に設計することができる。 (C) Compressed air guide wall 123
The compressed air guide wall 123 has a curved shape in order to guide the compressed air introduced from the compressed air introduction port 121 to the compressed air injection hole 122. A specific form of the compressed air guide wall 123 is not limited as long as it has at least a curved shape in order to guide the compressed air introduced from the compressed air introduction port 121 to the compressed air injection hole 122. The other structure is not particularly limited as long as the above effect is not impaired, and the structure can be freely designed according to the target bag filter or the form of the compressed air introduction pipe 2 to be connected.
　従来のバグフィルター用空気増幅装置では、Ｒ状傾斜面は露出した状態であるため（例えば、特許文献３図３参照）、バグフィルターによる操業が続けられるに従って、フィルターを通過してしまった微細な粉塵や紛体が、Ｒ状傾斜面の上に、付着・埋積されてくる。Ｒ状傾斜面上に付着・埋積された粉塵や紛体は、圧縮空気噴射孔からの圧縮空気の噴射の妨げとなり、コアンダ効果を低下させ、その結果、空気増幅率の低下を招く原因となっていた。 In the conventional bag filter air amplifying device, since the R-shaped inclined surface is exposed (see, for example, Patent Document 3 FIG. 3), as the operation by the bag filter continues, the finer that has passed through the filter. Dust and powder are deposited and buried on the R-shaped inclined surface. Dust and powder adhering and buried on the R-shaped inclined surface hinder the injection of compressed air from the compressed air injection hole and reduce the Coanda effect, resulting in a decrease in the air gain. It was.
　一方、本発明に係るバグフィルター用空気増幅装置１では、圧縮空気誘導壁１２３は、Ｒ状傾斜面１１１を覆った状態に設計されているため、フィルターを通過してしまった微細な粉塵や紛体は、圧縮空気誘導壁１２３の外部（上部）に付着・埋積される。即ち、粉塵や紛体が、Ｒ状傾斜面１１１の上に、付着・埋積されることがない。そのため、圧縮空気噴射孔１２２からの圧縮空気の噴射の妨げとなることがなく、長期的に安定したコアンダ効果を生じさせることができ、その結果、長期的に安定した優れた空気増幅効果を維持することができる。なお、圧縮空気誘導壁１２３の外部（上部）に付着・埋積された粉塵や紛体は、定期的に払拭、吸引などを行って除去すればよい。 On the other hand, in the bag filter air amplifying device 1 according to the present invention, the compressed air guide wall 123 is designed so as to cover the R-shaped inclined surface 111, so that fine dust or powder that has passed through the filter can be obtained. Is attached and buried outside (upper part) of the compressed air guide wall 123. That is, dust and powder are not attached or buried on the R-shaped inclined surface 111. Therefore, the compressed air injection from the compressed air injection hole 122 is not hindered, and a stable Coanda effect can be produced in the long term. As a result, an excellent air amplification effect stable in the long term is maintained. can do. It should be noted that the dust and powder adhering to and buried in the outside (upper part) of the compressed air guide wall 123 may be removed by periodically wiping or sucking.
　また、従来のバグフィルター用空気増幅装置では、圧縮空気導入口の中心が、圧縮空気誘導壁の湾曲の頂点と、同一ライン上に位置するように設計されていた（例えば、特許文献３図３参照）。本発明に係るバグフィルター用空気増幅装置１においても、従来と同様に、圧縮空気導入口１２１の中心が、圧縮空気誘導壁１２３の湾曲の頂点と、同一ライン上に位置するように設計することも可能ではあるが、圧縮空気導入口１２１の中心が、圧縮空気誘導壁１２３の湾曲の頂点よりも外側に位置するように設計することが好ましい（図２破線矢印参照）。圧縮空気導入口１２１の中心が、圧縮空気誘導壁１２３の湾曲の頂点よりも外側にすることで、圧縮空気導入口１２１から導入された圧縮空気が、圧縮空気誘導壁１２３に衝突した際、圧縮空気は更に高い位置にある湾曲の頂点方向へと導かれ、圧縮空気噴射孔１２２と逆方向へ流れるのを防止することができる。その結果、圧縮空気導入口１２１から導入された圧縮空気を、圧縮損失を最小限に抑えた状態で、圧縮空気噴射孔１２２へと導くことができる。 Further, the conventional bag filter air amplifying apparatus is designed so that the center of the compressed air inlet is located on the same line as the apex of the curve of the compressed air guiding wall (for example, see Patent Document 3 FIG. 3). reference). Also in the bag filter air amplifying apparatus 1 according to the present invention, the center of the compressed air inlet 121 is designed to be located on the same line as the curved apex of the compressed air guiding wall 123, as in the prior art. However, it is preferable to design the center of the compressed air introduction port 121 so as to be located outside the vertex of the curve of the compressed air guide wall 123 (see the broken line arrow in FIG. 2). When the compressed air introduced from the compressed air inlet 121 collides with the compressed air guide wall 123 by making the center of the compressed air inlet 121 outside the apex of the curve of the compressed air guide wall 123, the compressed air is compressed. Air is guided toward the apex of the curve at a higher position, and can be prevented from flowing in the direction opposite to the compressed air injection hole 122. As a result, the compressed air introduced from the compressed air introduction port 121 can be guided to the compressed air injection hole 122 in a state where the compression loss is minimized.
　＜２．バグフィルター用空気増幅システム１０＞
　図６は、本発明に係るバグフィルター用空気増幅システム１０の第１実施形態を側面から視た断面模式図である。本発明に係るバグフィルター用空気増幅システム１０は、前述した本発明に係るバグフィルター用空気増幅装置１と、圧縮空気導入管２と、を少なくとも備える。また、本発明に係るバグフィルター用空気増幅システム１０には、固定手段３を備えることもできる。以下、各部について、詳細に説明する。なお、本発明に係るバグフィルター用空気増幅装置１の詳細は、前述と同様であるため、ここでは説明を割愛する。 <2. Bag Filter Air Amplification System 10>
FIG. 6 is a schematic cross-sectional view of the first embodiment of the bag filter air amplification system 10 according to the present invention as viewed from the side. The bag filter air amplifying system 10 according to the present invention includes at least the bag filter air amplifying apparatus 1 according to the present invention and the compressed air introduction pipe 2 described above. The bag filter air amplifying system 10 according to the present invention may include a fixing means 3. Hereinafter, each part will be described in detail. The details of the bag filter air amplifying device 1 according to the present invention are the same as those described above, and therefore the description thereof is omitted here.
　（１）圧縮空気導入管２
　圧縮空気導入管２は、空気増幅装置１の前記圧縮空気導入部１２へ圧縮空気を導入する。圧縮空気導入管２の太さや長さなどの具体的な形態は、本発明の効果を損なわない限り特に限定されず、目的のバグフィルター、設置場所の形態などに合わせて自由に設計することができる。 (1) Compressed air introduction pipe 2
The compressed air introduction pipe 2 introduces compressed air into the compressed air introduction part 12 of the air amplifying device 1. The specific form such as the thickness and length of the compressed air introduction pipe 2 is not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the target bag filter, the form of the installation location, and the like. it can.
　また、圧縮空気導入管２の配置についても本発明の効果を損なわない限り特に限定されず、設置場所の形態などに合わせて自由に設計することができるが、本発明においては、空気増幅装置１の圧縮空気導入部１２に連通するように、圧縮空気導入部１２の下部に設置することが好ましい。例えば、特許文献２に記載のコアンダインジェクターのように、外部空気誘引口の上部に、圧縮空気導入管を設置することも理論的には可能である。しかしながら、外部空気誘引口の上部に圧縮空気導入管を設置すると、外部空気誘引口からの外部空気の誘引の際に空気の流れの障害となり、誘引する空気量が低下する場合があり、空気増幅効果が低下する恐れがある。そのため、本発明においては、圧縮空気導入管２を圧縮空気導入部１２の下部に設置することが好ましい。 Further, the arrangement of the compressed air introduction pipe 2 is not particularly limited as long as the effect of the present invention is not impaired, and can be freely designed according to the form of the installation place. In the present invention, the air amplifier 1 It is preferable to install in the lower part of the compressed air introduction part 12 so that it may communicate with this compressed air introduction part 12. For example, like the Coanda injector described in Patent Document 2, it is theoretically possible to install a compressed air introduction pipe above the external air inlet. However, if a compressed air inlet pipe is installed at the top of the external air inlet, the air flow may be obstructed when the external air is attracted from the external air inlet, and the amount of air to be attracted may decrease. The effect may be reduced. Therefore, in the present invention, it is preferable to install the compressed air introduction pipe 2 below the compressed air introduction part 12.
　更に、圧縮空気導入管２の具体的な断面形状についても、本発明の効果を損なわない限り特に限定されず、設置場所の形態などに合わせて自由に設計することができる。本発明においては特に、図６の第１実施形態に示すように、圧縮空気導入部１２の圧縮空気導入管２との接続面と、圧縮空気導入管２の前記圧縮空気導入部１２との接続面とが、互いに平行となるように設計することが好ましい。 Furthermore, the specific cross-sectional shape of the compressed air introduction pipe 2 is not particularly limited as long as the effects of the present invention are not impaired, and can be freely designed according to the form of the installation location. Particularly in the present invention, as shown in the first embodiment of FIG. 6, the connection surface of the compressed air introduction part 12 to the compressed air introduction pipe 2 and the connection of the compressed air introduction pipe 2 to the compressed air introduction part 12. It is preferable to design the surfaces so that they are parallel to each other.
　例えば、図７に示す本発明に係るバグフィルター用空気増幅システム１０の第２実施形態のように、圧縮空気導入部１２の圧縮空気導入管２との接続面と、圧縮空気導入管２の前記圧縮空気導入部１２との接続面とを、いずれも球面で形成することも可能である。これは、従来のバグフィルター用空気増幅システムと同様の接続面である。従来のバグフィルター用空気増幅システムでは、断面が円形または楕円形の圧縮空気導入部と圧縮空気導入管とを、外側を溶接（図６符号Ｃ参照）することで接続していた。しかし、この場合、球面に孔を設けて接続することになるため、溶接部Ｃ以外の接続部分から、圧縮空気が漏れ出るといった問題があり、これが、空気増幅効率の低下を招く原因の一つとなっていた。 For example, as in the second embodiment of the bag filter air amplification system 10 according to the present invention shown in FIG. 7, the connection surface of the compressed air introduction part 12 to the compressed air introduction pipe 2 and the compressed air introduction pipe 2 are The connecting surface with the compressed air introduction portion 12 can be formed as a spherical surface. This is the same connection surface as the conventional bag filter air amplification system. In the conventional air amplification system for bag filters, the compressed air introduction part and the compressed air introduction pipe having a circular or elliptical cross section are connected by welding the outside (see C in FIG. 6). However, in this case, since a hole is provided in the spherical surface and connected, there is a problem that compressed air leaks from a connecting portion other than the welded portion C. This is one of the causes that cause a decrease in air amplification efficiency. It was.
　一方、図６に示す本発明に係るバグフィルター用空気増幅システム１０第１実施形態のように、圧縮空気導入部１２の圧縮空気導入管２との接続面と、圧縮空気導入管２の前記圧縮空気導入部１２との接続面とが、互いに平行となるように設計することで、圧縮空気の漏出を防止することができる。 On the other hand, as in the first embodiment of the bag filter air amplifying system 10 according to the present invention shown in FIG. 6, the connection surface of the compressed air introduction part 12 with the compressed air introduction pipe 2 and the compression of the compressed air introduction pipe 2. By designing the connection surface with the air introduction part 12 to be parallel to each other, leakage of compressed air can be prevented.
　圧縮空気導入部１２と圧縮空気導入管２との接続は、図７に示す第２実施形態のように、溶接により行うことも可能であるが、図６に示す第１実施形態のように、パッキンＰを用いてシールすることも可能である。パッキンＰを用いて接続することにより、圧縮空気導入管２からバグフィルター用空気増幅装置１を容易に取り外すことが可能となり、破損による単品交換や、緊急に濾布穴を塞ぐ必要が生じた場合などに対応可能である。 The compressed air introduction part 12 and the compressed air introduction pipe 2 can be connected by welding as in the second embodiment shown in FIG. 7, but as in the first embodiment shown in FIG. It is also possible to seal using the packing P. By connecting with the packing P, it becomes possible to easily remove the air amplifier 1 for bag filter from the compressed air introduction pipe 2, and it becomes necessary to replace the single item due to breakage or to urgently close the filter cloth hole. Etc.
　加えて、本発明に係るバグフィルター用空気増幅システム１０に備える圧縮空気導入管２の数も、本発明の効果を損なわない限り特に限定されず、設置場所の形態などに合わせて１本或いは２本以上の複数本、備えることも可能である。本発明では特に、圧縮空気導入管２の数は、１本にすることが好ましい。圧縮空気導入管２を複数本設置する場合、通常、１本の管を分岐させて複数本とするため、分岐させることで空気の圧縮率が低下し、バグフィルター用空気増幅装置１へ導入される圧縮空気量が低下する場合がある。この場合、バグフィルター用空気増幅装置１内におけるコアンダ効果も低下し、その結果、空気増幅率を低下させる恐れがある。 In addition, the number of compressed air introduction pipes 2 provided in the bag filter air amplification system 10 according to the present invention is not particularly limited as long as the effects of the present invention are not impaired, and one or two according to the form of the installation location. It is also possible to provide more than one. In the present invention, the number of compressed air introduction pipes 2 is particularly preferably one. When a plurality of compressed air introduction pipes 2 are installed, since a single pipe is usually branched into a plurality of pipes, the air compression rate is lowered by branching, and the compressed air introduction pipe 2 is introduced into the bag filter air amplifier 1. Compressed air volume may decrease. In this case, the Coanda effect in the air amplifying device 1 for bag filter is also reduced, and as a result, the air amplification factor may be reduced.
　また、圧縮空気導入管２を複数本設置する場合、圧縮空気導入口１２１も複数設けることになるが、複数の圧縮空気導入口１２１から導入された圧縮空気は、圧縮空気導入部１２の内部で、稀に、その流れを干渉し合う場合がある。この場合、圧縮空気噴射孔１２２からの圧縮空気の噴射速度が低下し、その結果、空気増幅率を低下させる恐れがある。 When a plurality of compressed air introduction pipes 2 are installed, a plurality of compressed air introduction ports 121 are also provided. The compressed air introduced from the plurality of compressed air introduction ports 121 is contained inside the compressed air introduction unit 12. In rare cases, the flow may interfere with each other. In this case, the injection speed of the compressed air from the compressed air injection hole 122 decreases, and as a result, the air amplification factor may be decreased.
　一方、圧縮空気導入管２の数を１本とすれば、管の分岐に伴う空気の圧縮率の低下を防止することができ、また、圧縮空気導入部１２の内部で導入された圧縮空気同士の干渉を抑制することができ、その結果、優れた空気増幅効果を維持することができる。 On the other hand, if the number of the compressed air introduction pipes 2 is one, it is possible to prevent a reduction in the compression rate of the air due to the branching of the pipes, and between the compressed air introduced inside the compressed air introduction section 12. Interference can be suppressed, and as a result, an excellent air amplification effect can be maintained.
　図８は、本発明に係るバグフィルター用空気増幅システム１０の第３実施形態を模式的に示す模式斜視図である。第３実施形態では、圧縮空気導入部１２と圧縮空気導入管２との接続部に、圧縮空気誘導板４を備える。この圧縮空気誘導板４は、本発明において必須ではないが、圧縮空気導入管２から圧縮空気導入部１２への圧縮空気Ａの導入を誘導するために備えることができる。 FIG. 8 is a schematic perspective view schematically showing a third embodiment of the air amplification system 10 for a bag filter according to the present invention. In the third embodiment, a compressed air guide plate 4 is provided at a connection portion between the compressed air introduction portion 12 and the compressed air introduction pipe 2. The compressed air guide plate 4 is not essential in the present invention, but can be provided to guide the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction part 12.
　圧縮空気Ａは、圧縮空気導入管２の中を、一方方向（図８中矢印Ａ参照）で導入されてくるため、圧縮空気Ａの圧縮率や導入速度によっては、圧縮空気導入管２中の流れに沿って、圧縮空気導入部１２へ斜めに導入されてしまう場合がある。また、実際の現場においては、１レーンに装置１を８～９台連ねて配置する場合が多いため、圧縮空気導入管２の圧縮空気Ａの導入方向の下流へ行くほど、圧縮空気導入部１２へ導入される空気の量や圧力が大きくなり、各装置１に対して、安定的に圧縮空気Ａを導入することが難しい場合がある。そこで、圧縮空気導入部１２と圧縮空気導入管２との接続部に、圧縮空気誘導板４を備えれば、圧縮空気導入管２に対して垂直に近い角度で圧縮空気導入部１２への圧縮空気Ａの導入が可能になる。また、１レーンに複数の装置１を配置する場合においても、各装置１に対する圧縮空気Ａの導入量や圧力を一定に保つことができ、安定的に圧縮空気Ａを導入することが可能となる。 Since the compressed air A is introduced into the compressed air introduction pipe 2 in one direction (see arrow A in FIG. 8), depending on the compression rate and introduction speed of the compressed air A, In some cases, the air may be introduced into the compressed air introduction section 12 along the flow. Further, in an actual site, since there are many cases where 8 to 9 apparatuses 1 are arranged in a lane, the compressed air introduction section 12 becomes more downstream in the introduction direction of the compressed air A in the compressed air introduction pipe 2. The amount and pressure of air introduced into the apparatus may increase, and it may be difficult to stably introduce the compressed air A to each device 1. Therefore, if the compressed air guide plate 4 is provided at the connecting portion between the compressed air introduction part 12 and the compressed air introduction pipe 2, the compressed air is compressed to the compressed air introduction part 12 at an angle close to perpendicular to the compressed air introduction pipe 2. Air A can be introduced. Further, even when a plurality of devices 1 are arranged in one lane, the amount and pressure of compressed air A introduced into each device 1 can be kept constant, and the compressed air A can be stably introduced. .
　圧縮空気誘導板４の設置箇所は、圧縮空気導入管２から圧縮空気導入部１２への圧縮空気Ａの導入を、圧縮空気導入管２に対して垂直に近い角度で誘導することができれば、特に限定されない。図８の第３実施形態のように圧縮空気導入口１２１の上流側に設置することもできるし、例えば、図９の第４実施形態のように、圧縮空気導入口１２１の中央部に設置することも可能である。本発明では特に、圧縮空気導入管２に対して垂直に近い角度で誘導するためには、圧縮空気導入口１２１の中央部から上流側に設置することが好ましく、圧縮空気導入口１２１の最上流側に設置することがより好ましい。 The installation location of the compressed air guide plate 4 is particularly suitable if the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction section 12 can be guided at an angle close to the perpendicular to the compressed air introduction pipe 2. It is not limited. It can be installed upstream of the compressed air inlet 121 as in the third embodiment of FIG. 8, or is installed in the center of the compressed air inlet 121, for example, as in the fourth embodiment of FIG. It is also possible. Particularly in the present invention, in order to guide at an angle close to perpendicular to the compressed air introduction pipe 2, it is preferably installed upstream from the center of the compressed air introduction port 121, and the most upstream of the compressed air introduction port 121. More preferably, it is installed on the side.
　また、圧縮空気誘導板４は、圧縮空気導入部１２の空気の流れを妨げない程度に、圧縮空気導入口１２１の上部へ突き出した状態で設置することも可能である。 Further, the compressed air guide plate 4 can be installed in a state of protruding to the upper part of the compressed air introduction port 121 to such an extent that the air flow of the compressed air introduction unit 12 is not hindered.
　更に、圧縮空気誘導板４は、圧縮空気導入管２側と接続した状態で設置しても良いし、圧縮空気導入部１２側と接続した状態で設置しても良いし、圧縮空気導入管２および圧縮空気導入部１２の両方に接続した状態で設置しても良い。 Furthermore, the compressed air guide plate 4 may be installed in a state connected to the compressed air introduction pipe 2 side, may be installed in a state connected to the compressed air introduction part 12 side, or the compressed air introduction pipe 2. And you may install in the state connected to both the compressed air introduction parts 12. FIG.
　加えて、圧縮空気誘導板４の形態も、圧縮空気導入管２から圧縮空気導入部１２への圧縮空気Ａの導入を、圧縮空気導入管２に対して垂直に近い角度で誘導することができれば、特に限定されず、圧縮空気導入口１２１の形状、設置箇所などに応じて、自由に設計することができる。例えば、第３実施形態のように、楕円形の圧縮空気導入口１２１の最上流側に圧縮空気誘導板４を設置する場合は、Ｒ状に湾曲した形態の圧縮空気誘導板４を用いることが好ましい。また、第４実施形態のように、圧縮空気導入口１２１の中央部に圧縮空気誘導板４を設置する場合は、平板状の圧縮空気誘導板４や、図示しないが、圧縮空気導入口１２１を底面とするＬ字形状の圧縮空気誘導板４を用いることが好ましい。 In addition, the configuration of the compressed air guide plate 4 can also guide the introduction of the compressed air A from the compressed air introduction pipe 2 to the compressed air introduction section 12 at an angle close to the perpendicular to the compressed air introduction pipe 2. However, it is not particularly limited, and can be freely designed according to the shape of the compressed air inlet 121, the installation location, and the like. For example, when the compressed air guide plate 4 is installed on the uppermost stream side of the elliptical compressed air inlet 121 as in the third embodiment, the compressed air guide plate 4 having a curved shape in an R shape is used. preferable. Moreover, when installing the compressed air guide plate 4 in the center part of the compressed air introduction port 121 like 4th Embodiment, although not shown in figure, the compressed air introduction port 121 is not shown. It is preferable to use an L-shaped compressed air guide plate 4 as a bottom surface.
　（２）固定手段３
　図１０は、本発明に係るバグフィルター用空気増幅システム１０の第５実施形態を側面から視た断面模式図である。第５実施形態では、空気増幅装置１を固定する固定手段３を更に備える。固定手段３は本発明においては必須ではないが、固定手段３を設けることで、バグフィルター用空気増幅装置１の水平性を保つことができる。 (2) Fixing means 3
FIG. 10: is the cross-sectional schematic diagram which looked at 5th Embodiment of the air amplification system 10 for bag filters based on this invention from the side surface. In 5th Embodiment, the fixing means 3 which fixes the air amplification apparatus 1 is further provided. The fixing means 3 is not essential in the present invention, but by providing the fixing means 3, the horizontality of the bag filter air amplifying device 1 can be maintained.
　通常、バグフィルターのメンテナンスなどを行う際、バグフィルター用空気増幅システム１０上を、人が移動する場合がある。この場合、例えば、図６に示す第１実施形態や図７に示す第２実施形態では、バグフィルター用空気増幅装置１は、圧縮空気導入管２のみで支えられているため、人の重さによって、バグフィルター用空気増幅装置１が傾いてしまう可能性がある。 Normally, a person may move on the bag filter air amplification system 10 when performing maintenance or the like of the bag filter. In this case, for example, in the first embodiment shown in FIG. 6 and the second embodiment shown in FIG. 7, the bag filter air amplifying device 1 is supported only by the compressed air introduction pipe 2. As a result, the bag filter air amplifying device 1 may be inclined.
　一方、図１０に示す本発明に係るバグフィルター用空気増幅システム１０の第５実施形態のように、空気増幅装置１を固定する固定手段３を更に備えれば、人の重さによるバグフィルター用空気増幅装置１の傾きを防止して、その水平性を維持することができ、その結果、優れた空気増幅効果を維持することができる。 On the other hand, if a fixing means 3 for fixing the air amplification device 1 is further provided as in the fifth embodiment of the bag filter air amplification system 10 according to the present invention shown in FIG. The inclination of the air amplifying device 1 can be prevented and its horizontality can be maintained, and as a result, an excellent air amplifying effect can be maintained.
　以下、実施例に基づいて本発明を更に詳細に説明する。なお、以下に説明する実施例は、本発明の代表的な実施例の一例を示したものであり、これにより本発明の範囲が狭く解釈されることはない。 Hereinafter, the present invention will be described in more detail based on examples. In addition, the Example demonstrated below shows an example of the typical Example of this invention, and, thereby, the range of this invention is not interpreted narrowly.
　＜実験例１＞
　実験例１では、バグフィルター用空気増幅装置の各部での形態の違いにより、空気増幅部への圧縮空気の流入効率および空気増幅効果が変化するか否かを調べた。具体的には、本発明に係るバグフィルター用空気増幅装置の例として、図１および図２に示す第１実施形態、図３に示す第２実施形態、従来のバグフィルター用空気増幅装置の例として、特許文献３の図３に示す装置の圧縮空気導入管が１本のものを用いて、空気増幅部への圧縮空気の流入効率および空気増幅効率を比較した。 <Experimental example 1>
In Experimental Example 1, it was examined whether or not the efficiency of inflow of compressed air into the air amplifying unit and the air amplifying effect changed depending on the form of each part of the bag filter air amplifying device. Specifically, as an example of the air amplifier for a bag filter according to the present invention, the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, and an example of a conventional bag filter air amplifier. As a comparison, the inflow efficiency of compressed air into the air amplifier and the air amplification efficiency were compared using a single compressed air introduction pipe of the apparatus shown in FIG.
　（１）実験に用いた装置の詳細
　実験例１で用いたバグフィルター用空気増幅装置の詳細は、下記に示す表１の通りである。 (1) Details of the apparatus used in the experiment The details of the bag filter air amplifying apparatus used in Experiment 1 are shown in Table 1 below.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　（２）実験方法
　実施例１、２および比較例１に係るバグフィルター用空気増幅システムの圧縮空気導入管に、５気圧の圧縮空気を０．１秒間流し、空気増幅部への圧縮空気流入量と、増幅空気排出口からの流出空気量とを測定した。空気増幅部への圧縮空気の流入量の理論値を下記式（１）～（３）に基づいて算出し、算出した流入量（理論値）と測定した圧縮空気流入量とから、流入効率を算出した。また、測定した圧縮空気流入量と流出空気量から、空気増幅効率（流出空気量／圧縮空気流入量）を算出した。なお、実験は、それぞれの値が平衡となった時点で終了した。 (2) Experimental Method 5 atmospheres of compressed air is allowed to flow through the compressed air introduction pipe of the air amplification system for bag filters according to Examples 1 and 2 and Comparative Example 1 for 0.1 second, and the amount of compressed air flowing into the air amplification unit And the amount of air flowing out from the amplified air outlet. Calculate the theoretical value of the inflow of compressed air into the air amplifier based on the following formulas (1) to (3), and calculate the inflow efficiency from the calculated inflow (theoretical value) and the measured compressed air inflow. Calculated. Further, the air amplification efficiency (outflow air amount / compressed air inflow amount) was calculated from the measured compressed air inflow amount and outflow air amount. The experiment was terminated when the respective values reached equilibrium.
Figure JPOXMLDOC01-appb-M000002
 　ρ：気体の密度
　ｕ：流速
　Ａ：流路の断面積
Figure JPOXMLDOC01-appb-M000002
 ρ: Gas density u: Flow velocity A: Cross-sectional area of the flow path
Figure JPOXMLDOC01-appb-M000003
 　ρ０：澱み密度
Figure JPOXMLDOC01-appb-M000003
 ρ0: starch density
Figure JPOXMLDOC01-appb-M000004
 　ｒ：圧縮空気噴射孔の空気増幅部の中心からの位置
　ｓ：圧縮空気噴射孔の幅（スリット幅）
Figure JPOXMLDOC01-appb-M000004
 r: position of the compressed air injection hole from the center of the air amplification part s: width of the compressed air injection hole (slit width)
　（３）結果
　結果を下記の表２に示す。 (3) Results The results are shown in Table 2 below.
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
　表２に示す通り、従来品である比較例１と比べ、実施例２に係るバグフィルター用空気増幅システムを用いた場合の流出空気量は、0.456kg/secから0.547kg/secと２０％増加していた。更に、実施例１に係るバグフィルター用空気増幅システムを用いた場合の流出空気量は0.595kg/secと３０％も増加していた。 As shown in Table 2, the amount of outflow air when using the bag filter air amplification system according to Example 2 was increased by 20% from 0.456 kg / sec to 0.547 kg / sec, as compared with Comparative Example 1 which is a conventional product. Was. Furthermore, when the bag filter air amplification system according to Example 1 was used, the outflow air amount was 0.595 kg / sec, an increase of 30%.
　また、従来品である比較例１と比べ、実施例１および２に係るバグフィルター用空気増幅システムを用いた場合の圧縮空気流入量も、0.118kg/secから0.137kg/secへと１６％増加していた。この結果から、本発明に係るバグフィルター用空気増幅システムでは、従来品に比べ、空気増幅率のみならず、圧縮空気の流入効率までも優位に増加させることが確認できた。即ち、本発明に係るバグフィルター用空気増幅システムは、従来品に比べ、より少ない圧縮空気で高い空気増幅効果を実現させることができることが示された。 In addition, compared with the comparative example 1 which is a conventional product, the compressed air inflow rate when using the bag filter air amplification system according to Examples 1 and 2 is also increased by 16% from 0.118 kg / sec to 0.137 kg / sec. Was. From this result, it was confirmed that the air amplification system for a bag filter according to the present invention has a significant increase in not only the air amplification factor but also the inflow efficiency of compressed air as compared with the conventional product. That is, it was shown that the air amplification system for bag filters according to the present invention can realize a high air amplification effect with less compressed air than the conventional product.
　＜実験例２＞
　実験例２では、更に、バグフィルター用空気増幅装置の各部での形態の違いにより、空気増幅部への圧縮空気の流入効率および空気増幅効果が変化するか否かを調べた。具体的には、本発明に係るバグフィルター用空気増幅装置の例として、図３に示す第２実施形態、従来のバグフィルター用空気増幅装置の例として、特許文献３の図３に示す装置を用いて、空気増幅部への圧縮空気の流入効率および空気増幅効率を比較した。 <Experimental example 2>
In Experimental Example 2, it was further investigated whether the inflow efficiency of compressed air into the air amplifying unit and the air amplifying effect were changed depending on the form of each part of the bag amplifying device. Specifically, as an example of the bag filter air amplifying device according to the present invention, the second embodiment shown in FIG. 3, and as an example of a conventional bag filter air amplifying device, the device shown in FIG. It was used to compare the inflow efficiency of compressed air to the air amplifier and the air amplification efficiency.
　（１）実験に用いた装置の詳細
　実験例２で用いたバグフィルター用空気増幅装置の詳細は、下記に示す表３の通りである。 (1) Details of the apparatus used in the experiment The details of the bag filter air amplifying apparatus used in Experimental Example 2 are shown in Table 3 below.
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000006
　（２）実験方法
　実施例３および比較例２に係るバグフィルター用空気増幅システムの圧縮空気導入管を用いて、前記実験例１と同様の方法により空気増幅部への圧縮空気流入量と、増幅空気排出口からの流出空気量とを測定した。また、空気増幅部への圧縮空気の流入量の理論値を前記式（１）～（３）に基づいて算出し、算出した流入量（理論値）と測定した圧縮空気流入量とから、流入効率を算出した。また、測定した圧縮空気流入量と流出空気量から、空気増幅効率（流出空気量／圧縮空気流入量）を算出した。なお、実験は、それぞれの値が平衡となった時点で終了した。 (2) Experimental Method Using the compressed air introduction pipe of the bag filter air amplification system according to Example 3 and Comparative Example 2, the amount of compressed air flowing into the air amplification unit and amplification in the same manner as in Experimental Example 1 The amount of outflow air from the air outlet was measured. Also, a theoretical value of the inflow amount of compressed air into the air amplifying unit is calculated based on the above formulas (1) to (3), and the inflow is calculated from the calculated inflow amount (theoretical value) and the measured compressed air inflow amount. Efficiency was calculated. Further, the air amplification efficiency (outflow air amount / compressed air inflow amount) was calculated from the measured compressed air inflow amount and outflow air amount. The experiment was terminated when the respective values reached equilibrium.
　（３）結果
　結果を下記の表４に示す。 (3) Results The results are shown in Table 4 below.
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
　表４の結果に示す通り、従来品である比較例２と比べ、実施例３に係るバグフィルター用空気増幅システムを用いた場合の流出空気量は、0.40kg/secから0.48kg/secへと２０％も増加していた。 As shown in the results of Table 4, the amount of outflow air when using the bag filter air amplification system according to Example 3 from 0.40 kg / sec to 0.48 kg / sec as compared with Comparative Example 2 which is a conventional product. It increased by 20%.
　また、従来品である比較例２と比べ、実施例３に係るバグフィルター用空気増幅システムを用いた場合の流入効率も、８１％から９１％へと増加していた。この結果から、本発明に係るバグフィルター用空気増幅システムでは、圧縮空気導入管が１本であるにも関わらず、圧縮空気導入管が２本の従来品に比べ、空気増幅率のみならず、圧縮空気の流入効率までも優位に増加させることが確認できた。即ち、本発明に係るバグフィルター用空気増幅システムは、従来品に比べ、より少ない圧縮空気で高い空気増幅効果を実現できることが示された。 Also, in comparison with Comparative Example 2 which is a conventional product, the inflow efficiency when using the bag filter air amplification system according to Example 3 was increased from 81% to 91%. From this result, in the air amplification system for a bag filter according to the present invention, not only the compressed air introduction pipe has two compressed air introduction pipes, but also the air amplification factor, It was confirmed that the inflow efficiency of compressed air was also increased significantly. That is, it was shown that the air amplification system for a bag filter according to the present invention can achieve a high air amplification effect with less compressed air than the conventional product.
　＜実験例３＞
　実験例３では、バグフィルター用空気増幅装置の各部での形態の違い、流入空気圧力の違い、噴射時間および噴射間隔の違いによる、増幅空気排出口における風速の変化について検討した。具体的には、本発明に係るバグフィルター用空気増幅装置の例として、図３に示す第２実施形態、従来のバグフィルター用空気増幅装置の例として、特許文献３の図３に示す装置を用いて、増幅空気排出口における風速を比較した。なお、実施例４および比較例３の装置としては、前記実験例２で用いた実施例３および比較例２とそれぞれ同一のものを用いた。 <Experimental example 3>
In Experimental Example 3, the change in the wind speed at the amplified air discharge port due to the difference in the form of each part of the air amplifier for bag filter, the difference in the inflow air pressure, the difference in the injection time and the injection interval was examined. Specifically, as an example of the bag filter air amplifying device according to the present invention, the second embodiment shown in FIG. 3, and as an example of a conventional bag filter air amplifying device, the device shown in FIG. Using, the wind speed at the amplified air outlet was compared. As the devices of Example 4 and Comparative Example 3, the same devices as those of Example 3 and Comparative Example 2 used in Experimental Example 2 were used.
　（１）実験方法
　実施例４および比較例３に係るバグフィルター用空気増幅システムの圧縮空気導入管に、それぞれ下記の表５に示す圧力の圧縮空気を、それぞれ下記の表５に示す噴射時間および噴射間隔で噴射し、増幅空気排出口における風速を測定した。 (1) Experimental method Compressed air of the pressure shown in Table 5 below is applied to the compressed air introduction pipes of the air amplification system for bag filter according to Example 4 and Comparative Example 3, respectively, and the injection time shown in Table 5 below and Injection was performed at the injection interval, and the wind speed at the amplified air outlet was measured.
　（２）結果
　増幅空気排出口における風速の結果を下記の表５に示す。 (2) Results The results of wind speed at the amplified air outlet are shown in Table 5 below.
Figure JPOXMLDOC01-appb-T000008
Figure JPOXMLDOC01-appb-T000008
　表５に示す通り、従来品である比較例３と比べ、実施例４に係るバグフィルター用空気増幅システムを用いた場合、流入空気圧力の違い、噴射時間および噴射間隔の違いに関わらず、増幅空気排出口における風速が増加することが確認できた。 As shown in Table 5, when the bag filter air amplifying system according to Example 4 is used as compared with Comparative Example 3 which is a conventional product, amplification is performed regardless of the difference in inflow air pressure, the injection time, and the injection interval. It was confirmed that the wind speed at the air outlet increased.
　以上説明した実験例１～３は、いずれも装置１台での結果である。実際の現場においては、１レーンに装置を８～９台連ねて配置する場合が多いため、従来品と本発明品では、本実験例の結果よりも、大きな差が生じると考えられる。即ち、本発明に係るバグフィルター用空気増幅システムを用いれば、１レーンに装置を８～９台連ねる実際の現場においても、非常に高い空気増幅効率が実現でき、その結果、フィルターの逆洗浄効果を向上させることができると考えられる。 The experimental examples 1 to 3 described above are all results of one apparatus. Since there are many cases where 8 to 9 devices are arranged in one lane in an actual site, it is considered that there is a greater difference between the conventional product and the present invention than the result of this experimental example. That is, by using the air amplification system for bag filters according to the present invention, very high air amplification efficiency can be realized even in an actual site where 8 to 9 devices are connected in one lane, and as a result, the back washing effect of the filter is achieved. Can be improved.
　また、本発明に係るバグフィルター用空気増幅システムは、従来品に比べて非常に高い空気増幅効率を実現できるため、従来では十分に逆洗浄効果を得ることができなかったような大きい（長い）バグフィルターにも、好適に用いることができると考えられる。 In addition, the air amplification system for bag filter according to the present invention can realize a very high air amplification efficiency compared to the conventional product, and thus it is large (long) that a conventional backwashing effect cannot be obtained sufficiently. It is considered that it can be suitably used for a bag filter.
１　バグフィルター用空気増幅装置
１１　空気増幅部
１１１　Ｒ状傾斜面
１１２　外部空気誘引口
１１３　増幅空気排出口
１１４　側壁
１２　圧縮空気導入部
１２１　圧縮空気導入口
１２２　圧縮空気噴射孔
１２３　圧縮空気誘導壁
１０　バグフィルター用空気増幅システム
２　圧縮空気導入管
３　固定手段
４　圧縮空気誘導板 DESCRIPTION OF SYMBOLS 1 Bag filter air amplifier 11 Air amplifier part 111 R-shaped inclined surface 112 External air attracting port 113 Amplified air discharge port 114 Side wall 12 Compressed air introduction part 121 Compressed air inlet 122 Compressed air injection hole 123 Compressed air guide wall 10 Bug Filter air amplification system 2 Compressed air introduction pipe 3 Fixing means 4 Compressed air guide plate

Claims (13)

  1. 　バグフィルターの逆洗に用いる空気増幅装置であって、
    　外側へ向かって広がるＲ状傾斜面と、該Ｒ状傾斜面に連設して外部の空気を誘引する外部空気誘引口と、増幅された空気を排出する増幅空気排出口と、前記外部空気誘引口から前記増幅空気排出口へ渡って設けられた筒状の側壁と、が備えられた空気増幅部と、
    　圧縮された空気を導入する圧縮空気導入口と、圧縮空気を前記空気増幅部へ噴射する圧縮空気噴射孔と、前記圧縮空気導入口から導入された圧縮空気を前記圧縮空気噴射孔へ誘導する湾曲状の圧縮空気誘導壁と、が備えられた圧縮空気導入部と、
    　を少なくとも備え、
    　前記圧縮空気噴射孔は、前記Ｒ状傾斜面に沿って前記外部空気誘引口に設けられたバグフィルター用空気増幅装置。     An air amplifier used for backwashing a bag filter,
    An R-shaped inclined surface that spreads outward, an external air induction port that is connected to the R-shaped inclined surface to attract external air, an amplified air discharge port that discharges amplified air, and the external air attraction An air amplifying part provided with a cylindrical side wall provided from the mouth to the amplified air discharge port;
    Compressed air introduction port for introducing compressed air, compressed air injection hole for injecting compressed air to the air amplifying unit, and a curve for guiding the compressed air introduced from the compressed air introduction port to the compressed air injection hole A compressed air introduction part provided with a compressed air guide wall,
    Comprising at least
    The compressed air injection hole is a bag filter air amplifying device provided in the external air inlet along the R-shaped inclined surface.
  2. 　前記Ｒ状傾斜面は、前記圧縮空気誘導壁に覆われた状態である請求項１記載のバグフィルター用空気増幅装置。 The air amplifying device for a bag filter according to claim 1, wherein the R-shaped inclined surface is covered with the compressed air guiding wall.
  3. 　前記圧縮空気導入口の中心が、前記圧縮空気誘導壁の湾曲の頂点よりも外側に位置する請求項１または２に記載のバグフィルター用空気増幅装置 The air amplifier for a bag filter according to claim 1 or 2, wherein the center of the compressed air introduction port is located outside the apex of the curve of the compressed air guide wall.
  4. 　前記増幅空気排出口の断面面積は、前記外部空気誘引口の断面面積より広い請求項１から３のいずれか一項に記載のバグフィルター用空気増幅装置。 4. The bag filter air amplifying device according to claim 1, wherein a cross-sectional area of the amplification air discharge port is wider than a cross-sectional area of the external air induction port. 5.
  5. 　前記圧縮空気噴射孔から噴射される圧縮空気によるコアンダ効果が少なくとも持続される部位において、前記側壁が外側へ広がる請求項４記載のバグフィルター用空気増幅装置。 The air amplifying device for a bag filter according to claim 4, wherein the side wall extends outward at a portion where the Coanda effect by the compressed air injected from the compressed air injection hole is at least sustained.
  6. 　前記圧縮空気噴射孔は、前記圧縮空気誘導壁と、前記Ｒ状傾斜面との間隙で形成される請求項１から５のいずれか一項に記載のバグフィルター用空気増幅装置。 6. The air amplification device for a bag filter according to claim 1, wherein the compressed air injection hole is formed by a gap between the compressed air guide wall and the R-shaped inclined surface.
  7. 　前記圧縮空気誘導壁の内壁面には、前記Ｒ状傾斜面へ向けて凸部が形成された請求項６記載のバグフィルター用空気増幅装置 The air amplifying device for a bag filter according to claim 6, wherein a convex portion is formed on the inner wall surface of the compressed air guide wall toward the R-shaped inclined surface.
  8. 　前記凸部は、圧縮空気の流動方向に沿って設けられた請求項７記載のバグフィルター用空気増幅装置。 The air amplifier for a bag filter according to claim 7, wherein the convex portion is provided along a flow direction of the compressed air.
  9. 　バグフィルターの逆洗に用いる空気増幅システムであって、
    　請求項１から８のいずれか一項に記載の空気増幅装置と、
    　該空気増幅装置の前記圧縮空気導入部へ圧縮空気を導入する圧縮空気導入管と、
    　を少なくとも備えたバグフィルター用空気増幅システム。     An air amplification system used for backwashing a bag filter,
    The air amplifying device according to any one of claims 1 to 8,
    A compressed air introduction pipe for introducing compressed air into the compressed air introduction portion of the air amplifier;
    Air filter system with at least a bug filter.
  10. 　前記圧縮空気導入部の前記圧縮空気導入管との接続面と、前記圧縮空気導入管の前記圧縮空気導入部との接続面とが、互いに平行に形成された請求項９記載のバグフィルター用空気増幅システム。 The bag filter air according to claim 9, wherein a connection surface of the compressed air introduction part with the compressed air introduction pipe and a connection surface of the compressed air introduction pipe with the compressed air introduction part are formed in parallel to each other. Amplification system.
  11. 　前記圧縮空気導入部と前記圧縮空気導入管との接続部が、パッキンにてシールされた請求項９または１０に記載のバグフィルター用空気増幅システム。 The air amplification system for a bag filter according to claim 9 or 10, wherein a connection portion between the compressed air introduction portion and the compressed air introduction pipe is sealed with a packing.
  12. 　前記接続部に、前記圧縮空気導入管から前記圧縮空気導入部への圧縮空気の導入を誘導する圧縮空気誘導板が備えられた請求項９から１１のいずれか一項に記載のバグフィルター用空気増幅システム。 The air for bag filters as described in any one of Claim 9 to 11 with which the said connection part was equipped with the compressed air guide plate which guide | induces introduction of the compressed air from the said compressed air introduction pipe | tube to the said compressed air introduction part. Amplification system.
  13. 　前記空気増幅装置を固定する固定手段が備えられた請求項９から１２のいずれか一項に記載のバグフィルター用空気増幅システム。 The bag filter air amplification system according to any one of claims 9 to 12, further comprising fixing means for fixing the air amplification device.
PCT/JP2013/071106 2012-08-07 2013-08-05 Bag filter air amplification device and bag filter air amplification system using said bag filter air amplification device WO2014024817A1 (en)

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