JP2019093368A - Dust collector independently mounted with air amplifier used for back washing of bag filter - Google Patents

Abstract

To provide a dust collector with an air amplifier used for the back washing of a bag filter where the assembly work of the air amplifier and works such as maintenance, management and the like are independently performed.SOLUTION: In a dust collector 1 provided with an air amplifier 2 used for the back washing of a bag filter 4 and one compressed air introduction pipe 3 introducing compressed air to the air amplifier 2, a plurality of air amplifiers 2 are provided and the plurality of air amplifiers 2 are respectively fastened with a mounting bracket 5 and a band member 7 and detachably mounted by independent mounting.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to a dust collection apparatus for introducing a compressed air from an air amplification device to a bag filter which collects dispersed particles such as dust and powder, and backwashing the bag filter. In particular, the present invention relates to a dust collecting apparatus having a structure in which an air amplification device used for backwashing a bag filter is held independently.

  Conventionally, bag filters have been used to remove dust in thermal power plants, incinerators, general factories, etc., and to collect powders in powder factories and the like. The bag filter is one of the filtering and collecting means, and it uses a woven fabric or a non-woven fabric as a filter medium, and makes it a cylindrical shape with a closed bottom, and performs removal of introduced dust, collection of powder, and the like. When removing dust collected in such a bag filter and removing it, it may be washed away by mechanical vibration etc. Recently, an air compression device called an injector that jets compressed air to the bag filter Is widely used.

  For example, Patent Document 1 and Patent Document 2 disclose a Coanda injector provided with a blowing member (air amplifying device) for feeding amplified air to the bag filter when it is desired to sweep away powder adhering to the outer surface of the bag filter. ing. Patent Document 3 discloses a compressed air injection device provided with an air amplifier that supplies compressed air by the pressure of air amplified in a bag filter. Patent Document 4 discloses a Coanda-annular gap injector (air amplification device) that supplies compressed air to a filter element. The present invention is not in the configuration of the air amplification function of the Coanda injector, but proposes a novel mounting method for a dust collection device of an air amplifier as an air amplification device.

JP, 2014-176852, A JP, 2014-138936, A JP, 2008-115847, A Japanese Patent Application Laid-Open No. 56-113318

  In the bag filter described above, the dust in the processing air is collected by the filter, and only the air containing no dust is discharged, and the dust is removed. Such a bag filter is an assembly of air amplifiers and compressed air injection devices, which are complicated in structure and difficult to assemble. In addition, when the operation is continued, the filtering effect of the filter is reduced due to the dust and powder adhering to the filter and accumulating. Therefore, so-called backwashing must be performed so that compressed air is jetted from the direction opposite to the filtration direction of the filter at regular intervals and the dust adhering to the filter is removed. In addition, not only the filter but also the air amplification device for supplying compressed air to the filter must be regularly maintained and managed. Usually, 8 to 9 bag filters are often arranged in one lane, and one air amplifier is also provided corresponding to each of the bag filters. When assembling the apparatus, compressed air is used. It is necessary to assemble 8 to 9 in series in one pipe for feeding, and also to maintain and manage each of the plurality of air amplification devices to operate properly.

  The present invention has been made in view of the above problems, and by providing each of the air amplification devices used for backwashing of the bag filter by independently mounting, a hand for working between adjacent air amplification devices is provided. It is possible to provide a space into which the user can insert, and it is possible to put a hand into the space to perform necessary work, and to perform work such as maintenance and management for each air amplification device independently. It is an object of the present invention to provide a dust collecting apparatus provided with an air amplification device used for backwashing of a bag filter which also enables removal of individual air amplification devices.

A dust collection device provided with an air amplification device used for backwashing the bag filter of the present invention is
A dust collection device comprising: a plurality of air amplification devices used for backwashing a bag filter; and a single compressed air introduction pipe for introducing compressed air into the air amplification device,
Each of the plurality of air amplification devices is detachably mounted to the one compressed air introduction pipe by independent mounting.

Furthermore, a dust collection device provided with an air amplification device used for backwashing the bag filter of the present invention is
Each of the plurality of air amplification devices is detachably mounted independently on the one compressed air introduction pipe by a mounting bracket and a band member.

Furthermore, a dust collection device provided with an air amplification device used for backwashing the bag filter of the present invention is
When mounting each of the plurality of air amplification devices to the single compressed air introduction pipe independently and detachably by the mounting bracket and the band member, the outer edge crimped portion of the compressed air introduction portion of the air amplification device It has the feature that the hook section which hooks from the outside is provided.

Furthermore, the present invention relates to a dust collection apparatus provided with an air amplification device used for backwashing a bag filter of the present invention,
The air amplification device comprises an air amplification unit and a compressed air introduction unit,
The air amplification unit includes an R-shaped inclined surface extending outward, an external air suction port connected to the R-shaped inclined surface to attract external air, and an amplified air ejection port for ejecting amplified air. And a cylindrical side wall provided from the external air induction port to the amplified air jet port,
The compressed air introduction unit includes a compressed air introduction port for introducing compressed air from the compressed air introduction pipe, a compressed air injection hole for injecting compressed air to the inner wall surface of the air amplification unit, and the compressed air introduction port. And a curved compressed air guiding wall for guiding the introduced compressed air to the compressed air injection hole.

  According to the present invention, it becomes possible to provide a space between adjacent air amplification devices by providing each of the air amplification devices used for backwashing the bag filter by independently mounting on the frame of the dust collection device. It was possible to put the hand into the space to do the necessary work, to perform the work such as maintenance and management for each air amplification device independently, and to enable the removal of each air amplification device. It is a thing.

An air amplification apparatus used for backwashing a bag filter and a single compressed air introduction pipe for introducing compressed air to the air amplification apparatus, which are configured as a dust collection apparatus as one embodiment of the present invention It is a schematic front view which shows each arrangement relationship. An air amplification apparatus used for backwashing a bag filter and a single compressed air introduction pipe for introducing compressed air to the air amplification apparatus, which are configured as a dust collection apparatus as one embodiment of the present invention It is a schematic top view which shows each arrangement relationship. It is a schematic front view showing a single compressed air introduction pipe which introduces compressed air to an air amplification device, which is configured in a dust collection apparatus as an embodiment of the present invention. A schematic top view showing a configuration in which an air amplification device is mounted independently on a single compressed air introduction pipe for introducing compressed air to the air amplification device, which is configured in a dust collection apparatus as one embodiment of the present invention is there. It is a perspective view of the air amplification device used for backwashing of the bag filter constituted as the dust collection device as one example of the present invention. It is sectional drawing of the air amplification apparatus used for backwashing of the bag filter comprised by the dust collector as one Example of this invention. It is a perspective view which shows the mounting bracket and band member of the center part corresponding to the air amplification apparatus of 2nd-7th of 8 comprised in the dust collector as one Example of this invention. An air amplification device is mounted on a single compressed air introduction pipe by means of a mounting bracket and a band member at the center part of the second to seventh of eight in the dust collecting apparatus as one embodiment of the present invention. It is a perspective view which shows the arrangement | positioning relationship of each member for clamp-fixing. A perspective view showing a mounting bracket and a band member at the left end corresponding to an air amplification device of the first (of the left end shown in FIG. 2) of eight sets of the dust collecting apparatus as one embodiment of the present invention It is. A single compressed air introduction pipe is provided by the mounting bracket and the band member at the left end of the first of eight (the left end shown in FIG. 2) of the eight sets of the dust collecting apparatus as one embodiment of the present invention It is a perspective view showing arrangement relation of each member for clamp-fixing an air amplification device. The right end mounting bracket and the band member corresponding to the air amplification device at the right end of the eighth (of the right end shown in FIG. 2) of the eight sets (the right end shown in FIG. 2) configured in the dust collecting apparatus as an embodiment of the present invention It is a perspective view. One compressed air introduction pipe is provided by the mounting bracket and the band member at the right end of the eighth (of the rightmost ones shown in FIG. 2) of the eight sets of the dust collecting apparatus as one embodiment of the present invention It is a perspective view showing arrangement relation of each member for clamp-fixing an air amplification device. It is a perspective view which shows a means to fix firmly 8 air amplification apparatuses comprised to the dust collector as one Example of this invention on one compressed air introduction pipe.

  Hereinafter, examples as embodiments of the present invention will be described with reference to FIGS. Of course, the present invention is not limited to the specific embodiment described in the present embodiment without departing from the spirit of the invention, and those having a configuration which can be easily changed by those skilled in the art. It is not necessary to explain that it is easily applicable.

  The dust collection device 1 of the present embodiment includes a plurality of air amplification devices 2 for amplifying compressed air, and a single compressed air introduction pipe 3 for introducing the compressed air into each air amplification device 2, The compressed air amplified by the air amplification device 2 is jetted to the bag filter 4 to backwash the bag filter 4.

  The air amplification device 2 according to this embodiment includes a plurality of (eight) air amplification devices 2 for one compressed air introduction pipe 3, and eight air amplification devices 2 are arranged along the one compressed air introduction pipe 3. And the mounting bracket 5 is interposed therebetween. The configuration of the mounting bracket 5 will be described later. Further, although one compressed air introduction pipe 3 on which each of a plurality (eight trains) of air amplification devices 2 is detachably mounted independently is supported on the frame of the dust collection device 1 although not described in detail, In the lower part of each air amplification device 2, one bag filter 4 is installed on the partition 6 of the dust collection device 1 corresponding to each (FIG. 1).

  As shown in FIGS. 5 and 6, the air amplification device 2 is configured of an air amplification unit 11 and a compressed air introduction unit 12. The air amplification unit 11 includes an R-shaped inclined surface 111, an external air induction port 112, an amplified air jet port 113, and a side wall 114. The compressed air introduction section 12 includes a compressed air introduction port 121; A compressed air injection hole 122 and a compressed air guiding wall 123 are provided. Each part will be described in detail below.

  The air amplification unit 11 is a portion that amplifies air using the Coanda effect by the compressed air introduced from the compressed air introduction unit 12.

  The R-shaped inclined surface 111 has a form that spreads outward in order to guide the outside air to the outside air inlet 112. The specific aspect such as the size and the inclination angle of the R-shaped inclined surface 111 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 4 or the like.

  The external air inlet 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 amplification effect is not impaired, and can be freely designed according to the size of the filter cloth used for the desired bag filter 4 or the like. For example, when the diameter of the filter cloth of the bag filter 4 is about 150 mm, the external air inlet 112 can be designed to have an inner diameter of 70 to 80 mm.

  The amplified air spout 113 is a portion for discharging the amplified air toward the bag filter 4. The opening area and the opening shape of the amplification air jet port 113 are not particularly limited as long as the amplification effect is not impaired, and can be freely designed according to the size of the filter cloth used for the target bag filter 4 or the like. For example, when the diameter of the filter cloth of the bag filter 4 is about 150 mm, the amplification air jet port 113 can be designed to have an inner diameter of 70 to 80 mm.

  The side wall 114 is provided from the external air induction port 112 to the amplified air jet port 113, and amplifies the compressed air injected from the compressed air injection hole 122 and the external air attracted from the external air induction port 112. It has a cylindrical shape for guiding to the outlet 113. And as shown in FIG. 1, each air amplification apparatus 2 is detachable by independent mounting by fastening the cylindrical side wall 114 to the mounting bracket 5 by the band member 7 provided corresponding to each. Provided in The specific aspect such as the length of the side wall 114 is not particularly limited as long as the amplification effect is not impaired, and can be freely designed according to the target bag filter 4 or the like.

  The compressed air introduction unit 12 has an annular shape in appearance, and is configured to introduce the compressed air sent from the single compressed air introduction pipe 3 into the inside of the air amplification device 2. The compressed air introduction port 121 is an opening for introducing the compressed air sent from the compressed air introduction pipe 3 into the inside of the compressed air introduction unit 12. The specific aspect such as the opening area and the opening shape of the compressed air introduction port 121 is not particularly limited as long as the amplification effect is not impaired, and may be freely according to the form of the target bag filter 4 and the compressed air introduction pipe 3 to be connected. It can be designed.

  The compressed air injection holes 122 are configured to inject the compressed air introduced from the compressed air inlet 121 to the inner wall surface of the air amplification unit 11. The compressed air injection holes 122 are provided along the R-shaped inclined surface 111 in the external air inlet 112.

  The compressed air guiding wall 123 has a curved shape in order to guide the compressed air introduced from the compressed air inlet 121 to the compressed air injection holes 122. If the specific form of the compressed air guiding wall 123 is at least a curved form in order to guide the compressed air introduced from the compressed air inlet 121 to the compressed air injection hole 122, an amplification effect is obtained. The other structure is not particularly limited as long as it does not impair the above, and can be freely designed in accordance with the desired bag filter 4 or the form of the compressed air introduction pipe 3 to be connected.

  As shown in FIG. 4, the mounting bracket 5 is integrally provided to a single compressed air introduction pipe 3 by welding or the like, and an air amplification device is provided to the arc-shaped abutting portion of the mounting bracket 5. The two cylindrical side walls 114 abut, hold the air amplification portion 11, and at the same time are supported by the band member 7 from the opposite side, the plurality of air amplification devices 2 maintain their horizontality and become independent, respectively. It can be mounted.

  Here, as clearly shown in FIG. 4, the configuration of independent mounting of a plurality of (eight) air amplification devices for one compressed air introduction pipe 3 is the center of the single compressed air introduction pipe 3. Parts (mounting bracket 51 and band member 71), the left end (mounting bracket 52 and band member 72), and the right end (mounting bracket 53 and band member 73) have similar functions, but the shape of each member is It is different. The "central part", "left end part" and "right end part" referred to here are positional relationships as viewed from FIG.

  The mounting bracket 5 (51, 52, 53), as shown in FIG. 7 to FIG. 12, has a support bottom surface (511, 521, 531) of the compressed air introduction pipe 3 and air at the central portion, the left end portion and the right end portion. A gripping portion (512, 522, 532) for gripping the air amplification portion 11 of the amplification device 2 at a predetermined position, a front support portion (513, 523, 533) of the compressed air introducing pipe 3, and a compressed air introducing pipe And three back supports (514, 524, 534). The rear surface support portions (514, 524, 534) are configured by a pair of right and left, only the right side, or only the left side, and in any case, they are integrally attached to the rear surface of the compressed air introduction pipe 3 by welding or the like. . The compressed air introduction pipe 3 referred to here as "front side" and "rear side" is "front side" at the lower side when viewed from Fig. 4 and "back side" as the upper side.

  Since the central portion of the compressed air introducing pipe 3 is linear, the band member 71 corresponding to the mounting bracket 51 has a semicircular arc shape. Although the band member 71 is not shown in detail, it is bolted to the rising portion of the rear surface support portion 514 of the compressed air introduction pipe 3, and the air amplification device 2 is independently mounted at a predetermined position of one compressed air introduction pipe 3. can do. At the time of bolting, bolt holes a and a and bolt holes b and b described on the mounting bracket 51 and the band member 71 are bolted. The same applies to FIG. 10 and FIG.

  The configuration of the mounting bracket 52 and the band member 72 at the left end portion of the compressed air introducing pipe 3 is shown in FIG. 9, and the mounting state of the air amplification device 2 is shown in FIG. At the left end of the compressed air introduction pipe 3, compressed air is supplied into the compressed air introduction pipe 3 from a compressed air supply pipe 33 connected to a compressed air source (not shown). The compressed air introduction pipe 3 is connected to the left end pipe line 32 via the inclined relay pipe line 31. The compressed air supply pipe 33 connected to the compressed air source in the factory is connected to the opening formed in the left end pipe line 32, and receives the compressed air. The inclined relay pipe 31 is connected to the compressed air introduction pipe 3 and the left end pipe 32 at an inclination angle of 45 degrees.

  The rear surface support portion 524 of the compressed air introduction pipe 3 of the mounting bracket 52 at the left end portion is not composed of a pair but constituted only by the right side portion, and the left end portion of the rear surface support portion 524 A space for supporting the left end conduit 32 is provided. The one rear surface support portion 524 is integrally attached to the rear surface of the compressed air introduction pipe 3 by welding or the like. In addition, the air amplification unit 11 of the air amplification device 2 is positioned at the holding unit 522 and bolted and held by a band member 72 having a quarter arc shape.

  The configuration of the mounting bracket 53 and the band member 73 at the right end portion of the compressed air introduction pipe 3 is shown in FIG. 11, and the mounting state of the air amplification device 2 is shown in FIG. The right end of the compressed air introduction pipe 3 is the end of the compressed air introduction pipe 3, and the flow path is made dead by the end plate 10.

  The rear surface support portion 534 of the compressed air introducing pipe 3 of the mounting bracket 53 at the right end portion is not a pair of configurations but only the left side portion (the opposite side to the rear surface support portion 524 of the mounting bracket 52 at the left end portion). The one rear surface support portion 534 is integrally attached to the rear surface of the compressed air introduction pipe 3 by welding or the like. In addition, the air amplification unit 11 of the air amplification device 2 is positioned at the holding unit 532 and is bolted and held by a 1⁄4 arc-shaped band member 72.

  An end plate 10 closing the end of the compressed air introduction pipe 3 extends to the rear side and forms a bolting hole f. Accordingly, the air amplification unit 11 of the air amplification device 2 is positioned at the holding unit 532 and held by the band member 72 having a quarter arc shape.

  The single compressed air introduction pipe 3 on which the plurality of air amplification devices 2 are independently mounted as described above is appropriately attached to the housing of the dust collection back surface device 1 by an appropriate means. In the illustrated embodiment, the left end is supported by the compressed air supply tube 33 on the frame and the right end is supported on the frame by the support plate 9 fixed to the end plate 10. The support plate 9 may be provided with a reinforcing rib 91.

  In order to attach the air amplification device 2 held by the holding portion (512, 522, 532) and independently mounted by the mounting bracket 5 and the band member 7 more firmly to the compressed air introduction pipe 3, the details are shown in FIG. A hook 8 shown at 13 can be provided. The hook 8 is formed of a single plate material, and a parallel cut 81 is formed to form a long strip-like protrusion 82, and the protrusion 82 is formed in a chevron shape, and the chevron top portion is compressed air introduction of the air amplification device 2 The outer edge crimped portion of the portion 12 is configured as a hook portion that is hooked from the outside.

  The compressed air introduction pipe 3 introduces the compressed air into the compressed air introduction portion 12 of the air amplification device 2. The specific form such as the thickness and length of the compressed air introduction pipe 3 is not particularly limited as long as the air amplification device 2 does not impair the amplification effect, and can be freely selected according to the desired bag filter 4 and the form of the installation place It can be designed.

  Further, the arrangement of the compressed air introduction pipe 3 is not particularly limited as long as the above-described effects are not impaired, and the arrangement can be freely designed according to the form of the installation place or the like. It is preferable to install in the lower part of the compressed air introduction part 12 so that it may be connected to the compressed air introduction part 12 of this.

  Also, in general, when maintenance of the air amplification device 2 or the bag filter 4 is performed, a person may move on the air amplification device 2. In this case, the weight of the person may cause the air amplification device 2 to tilt.

  However, in the present embodiment, since the air amplification device 2 is held by the band member 7 and the mounting bracket 5, the inclination of the air amplification device 2 due to the weight of a person can be prevented and its horizontality can be maintained. As a result, an excellent air amplification effect can be maintained.

  According to the dust collecting apparatus 1 provided with the air amplification device 2 used for backwashing the bag filter 4 of the present embodiment as described above, each of the plurality of air amplification devices is detachably mounted by being independently mounted. The operations such as maintenance and management for each air amplification device can be performed independently.

1 dust collection device 2 air amplification device 3 compressed air introduction pipe 4 bag filter 5 mounting bracket (51, 52, 53)
6 Partition of dust collector 7 Band member (71, 72, 73)
8 hook 9 support plate 10 end plate 11 air amplification section 12 compressed air introduction section 31 inclined relay pipeline 32 left end pipeline 33 compressed air supply pipe 111 R-shaped inclined surface 112 external air induction port 113 amplified air jet port 114 side wall 121 compression Air inlet 122 Compressed air injection hole 123 Compressed air guiding wall

Claims (4)

A dust collection device comprising: a plurality of air amplification devices used for backwashing a bag filter; and a single compressed air introduction pipe for introducing compressed air into the air amplification device,
A dust collecting apparatus provided with an air amplification device used for backwashing of a bag filter characterized in that each of the plurality of air amplification devices is detachably mounted on the single compressed air introduction pipe by being independently mounted. .   The backwashing of the bag filter according to claim 1, wherein each of the plurality of air amplification devices is detachably and independently mounted by the mounting bracket and the band member to the single compressed air introduction pipe. Dust collector equipped with an air amplification device used for   When mounting each of the plurality of air amplification devices to the single compressed air introduction pipe independently and detachably by the mounting bracket and the band member, the outer edge crimped portion of the compressed air introduction portion of the air amplification device The dust collecting apparatus according to claim 2, further comprising a hook portion for hooking the bag from the outside. The air amplification device includes an air amplification unit and a compressed air introduction unit,
The air amplification unit includes an R-shaped inclined surface extending outward, an external air suction port connected to the R-shaped inclined surface to attract external air, and an amplified air ejection port for ejecting amplified air. And a cylindrical side wall provided from the external air induction port to the amplified air jet port,
The compressed air introduction part is introduced from a compressed air introduction port for introducing compressed air from the compressed air introduction pipe, a compressed air injection hole for injecting compressed air to the air amplification part, and the compressed air introduction port 4. An air amplification apparatus for use in backwashing a bag filter according to any one of claims 1 to 3, further comprising: a curved compressed air guiding wall for guiding compressed air to the compressed air injection holes. Dust collector equipped with

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