JP2019130437A - Dust collection system - Google Patents

Abstract

To provide a dust collection system that can be reduced in size and weight, improved in work operability, and simplified in maintenance and inspection.SOLUTION: In a dust collection system configured so that dust is suctioned through a suction port by suction force of a suction device, a cyclone type centrifugal device that collects dust suctioned through the suction port, a water spray part that sprays water to the dust to make the dust muddy, a muddy dust collection part that collects muddy dust and a filter part that collects fine dust are provided in this order in a passage from the suction port side to the suction device side. Further, the system is provided with a turbulence generation part that causes turbulence in flow of the dust suctioned from the suction port and not yet collected by the cyclone type centrifugal device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dust collection system for collecting dust.

  A dry dust collection method using a cyclone (powder separator) is widely known as a simple method. For example, in the cyclone separation apparatus described in Patent Document 1, a disc-shaped shielding member is arranged to prevent dust from flowing out due to an updraft and to keep dust in the accumulation chamber as much as possible.

  However, it is difficult to keep all the dust in the accumulation chamber, and it is necessary to rely on dust collection by the HEPA filter. However, for needle-shaped powders such as asbestos, there is a risk of passing through the eyes of the HEPA filter, so moisten the dust with water to form dust sludge, and suppress the outflow caused by the rising of dust by the dry dust collection method. Wet dust collection method that can be used is considered to be an effective method for dust collection.

  As an example of the wet dust collection method, for example, in the wet dust collector described in Patent Document 2, it is shown that watering the dust is effective for the recovery. Moreover, in the dust removal method described in Patent Document 3, water supply is performed in a mist room in front of the cyclone unit. In these removal methods, the dust that scatters horizontally is transferred and collected to the cyclone section by a blower, and the dust that could not be collected is sprayed and sprayed, then placed on an updraft and collected via a gas-liquid separator, or sprayed water After that, the dust is removed as dust sludge to the drain outlet at the bottom of the mist room. Furthermore, in the dust collector described in Patent Document 4, after the dust collected by the cyclone or the filter is hydrated, the dust kneaded material created by the kneader is discarded.

Japanese Patent No. 5031807 Japanese Patent No. 5317953 Japanese Patent No. 5413762 Japanese Patent No. 3697698

  However, in the wet dust collector described in Patent Document 2, there is a problem that the mesh of the gas-liquid separator is easily clogged by the dust sludge.

  Moreover, in the dust removal method described in Patent Document 3, a part of the dust sludge adheres to the mist room or the rotating tank, so that all of the dust sludge is not transferred to the cyclone part or the drain outlet at the lower part of the mist room. There is a problem.

  Furthermore, in the dust collector described in Patent Document 4, the air pressure and the amount of water suitable for kneading must be delicately adjusted according to the properties of the dust. Is difficult. Also, providing such a function leads to an increase in the size of the apparatus, and there is a problem that it is difficult to move the apparatus in a narrow place or a high place.

  As described above, in the wet dust collection method, filters, meshes, and drainage ports due to dust sludge are likely to be clogged and adhered, and frequent filter replacement is required, so work efficiency and economy are not significant. .

  Further, since the apparatus becomes large and becomes a permanent type or a vehicle body unit type, it is difficult to move the apparatus to the work site while lacking in mobility. Furthermore, it is difficult to carry in a small site. Also, the device itself is often complicated and expensive. In addition, since the installation location is limited due to its large size, it may be necessary to collect dust by drawing a long pipe from the work site to the dust collector. Therefore, the efficiency of the dust collection work is deteriorated and it is difficult to easily perform repair work such as cleaning and replacement of parts. Therefore, a large or permanent dust collector can only handle a relatively large site and not a small site because of its work economy. At small sites where equipment cannot be installed, it is not possible to sufficiently collect dust, which can cause serious problems with the health of workers working there.

  Accordingly, an object of the present invention is to provide a dust collection system that can be reduced in size and weight, improved in work operability, and simplified in maintenance and inspection.

  In order to solve the above-described problems, the dust collection system of the present invention is a dust collection system that sucks dust from the suction port by the suction force of the suction device, and sucks in the path from the suction port side to the suction device side. A cyclone-type centrifugal separator that collects dust sucked from the mouth, a water spray section that muds dust by spraying water, a dust sludge collection section that collects dust sludge, a filter section that collects fine dust, Are provided in order, and are characterized in that a turbulent flow generating section is provided which includes turbulence in the flow of dust that is sucked from the suction port and not collected by the cyclone centrifugal separator.

  In the dust collection system of the present invention, it is preferable that the filter unit has a HEPA filter and a filter conforming to the HEPA filter.

  In the dust collection system of the present invention, the turbulent flow generation unit may be provided between the water spray unit and the dust sludge recovery unit and / or between the cyclone centrifugal separator and the water spray unit. it can. Moreover, it can replace with this or in addition to this, the structure which provides a water spray part in a turbulent flow generation part is also possible.

  In the dust collection system of the present invention, the turbulent flow generating portion includes a spiral groove formed in the circumferential direction of the inner peripheral surface of the pipe portion extending along the route, and the mesh portion so as to intersect the route. And a configuration in which a plurality of blade-like members are arranged, or a combination of two or more.

  In the dust collection system of the present invention, the water spray section preferably includes a spray nozzle that sprays water, and the spray nozzle preferably has a structure that can spray in a fan shape having a spreading angle.

  According to the present invention, it is possible to provide a dust collection system that can be reduced in size and weight, improved in work operability, and simplified in maintenance and inspection.

It is a figure showing a schematic structure of a dust collection system concerning an embodiment of the present invention. It is sectional drawing in the AA line of FIG. 3 which shows schematic structure of the cyclone-type centrifuge in embodiment of this invention. It is the figure which looked at the schematic structure inside the cyclone type centrifuge in embodiment of this invention from the side. (A) is the figure which looked at the schematic structure inside the water spray part and the turbulent flow generation part from the side, (b) is the figure which looked at the schematic structure inside the water spray part and the turbulent flow generation part from above. is there. It is a table | surface which shows the vacuum degree and air volume when changing the structure of the motor in a suction device. It is a table | surface which shows the amount of dust collect | recovered by the filter part in the structure which changed the presence or arrangement sequence of a cyclone type centrifuge, a water spray part, a dust sludge collection | recovery part, a filter part, and a suction device. It is a table | surface which shows the collection amount of the dust in the structure which provided the turbulent flow generation | occurrence | production part, and the structure which does not provide.

    Hereinafter, a dust collection system according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a dust collection system 10 of the present embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 3, showing a schematic configuration of a cyclone centrifuge 30, and FIG. FIG. 4A is a side view of the schematic configuration inside the cyclone centrifuge 30, and FIG. 4A is a side view of the schematic configuration inside the water spray unit 40 and the turbulent flow generation unit 70. b) is a view of the schematic configuration inside the water spray section 40 and the turbulent flow generation section 70 as viewed from above. In each figure, the flow of dust sucked from the suction port 11 is schematically shown by thick arrows.

<Overall structure / outline>
A dust collection system 10 of this embodiment shown in FIG. 1 is a dust collection system that sucks dust from a suction port 11 by the suction force of a suction device 20. In a conduit (path) 12 from the suction port 11 side to the suction device 20 side, a cyclone centrifugal device 30, a water spray unit 40, a dust sludge recovery unit 50, and a filter unit 60 are provided in this order. . In the present embodiment, there is provided a turbulent flow generation unit 70 that includes turbulence in the flow of dust that is sucked from the suction port 11 and not collected by the cyclone centrifuge 30. The turbulent flow generation unit 70 exemplified in the present embodiment is provided between the water spray unit 40 and the dust sludge recovery unit 50.

The dust collection system 10 uses both a dry dust collection method widely used in a simple method and a wet dust collection method in which dust that cannot be collected by the dry dust collection method is wetted with water and collected. Make the best use of the good points. That is, dust or the like generated by a grinder or the like is sucked from the suction port 11 and collected by the cyclone centrifuge 30 as a dry dust collection method, and includes dust that cannot be collected by the cyclone centrifuge 30. Dust sludge is generated and collected by the dust sludge collection unit 50 as a wet dust collection method. Furthermore, by providing a water spray unit 40 having a function of making the dust mud immediately before the dust sludge recovery unit 50, the dust sludge in the process is created as efficiently as possible.
Hereinafter, each of the apparatus etc. which comprise the dust collection system 10 is demonstrated.

<Suction device 20>
The suction device 20 includes a cyclone centrifuge 30, a water spray unit 40, a turbulent flow generation unit 70, and a dust sludge recovery unit 50, in which dust sucked from the suction port 11 is sequentially connected via a pipe line (path) 12. And a device having a suction force for suction through the filter unit 60. As the suction device 20, for example, it is configured with equipment in which three motors 116119-00 (model number) manufactured by AMETEK are connected in series. In this configuration, either a voltage of 100 V or 200 V can be used as the power source of the suction device 20. In general, since the suction air volume is larger in the 200V specification, for example, even when four or more suction hoses 15m are connected and the length of the hoses is 30m or more, dust is absorbed and recovered.

In addition to the above-described structure, the suction device 20 is a CK vacuum device manufactured by Clintech Koizumi Co., Ltd. (suction force 4663 mm / Aq (0.046 MPa), exhaust air volume 6 m ³ / min, about 60 m can be suctioned on a flat ground) A single suction device may be connected and used, or a vacuum motor or the like having a suction force that conforms to or exceeds the capability of the suction device may be used. For example, when the vacuum motors are arranged in series, the degree of vacuum increases, so that such an arrangement may be used.

FIG. 5 is a table showing the degree of vacuum and the flow rate when the configuration of the motor in the suction device is changed. Details of each configuration shown in FIG. 5 are as follows.
Overall configuration: Suction port → Cyclone type centrifugal separator → Water spray part → Dust sludge recovery part → Filter part → Suction apparatus Suction apparatus: AMETEK Motor 116119-00
Suction port (suction hose): inner diameter 38mm, length 10m
Inlet: Diameter 48mm
Measurement location: suction hose tip (grinder connection port)
Cyclone centrifuge: GL PS manufactured by HTC (Sweden)

  According to the results shown in FIG. 5, the degree of vacuum is the same when one motor is used and when two motors are arranged in parallel, whereas when two motors are arranged in series, The degree of vacuum is high and the air volume is also increasing. Based on this result, it is preferable to select a motor configuration that can provide an appropriate degree of vacuum and air volume according to the type of dust and the like.

  Further, in the configuration from the cyclone type centrifugal separator 30 to the filter unit 60, in consideration of the possibility that all dust is not collected and reaches the suction device 20, dust is discharged from the exhaust port of the suction device 20. In order to prevent such a situation, it is preferable to install a filter at the exhaust port of the suction device 20. The filter used here is preferably a HEPA filter.

<Cyclone Centrifugal Separator 30>
In the dust collection system 10, two cyclone centrifuges 30 having the configuration illustrated in FIGS. 2 and 3 are used, but one or three or more of these separators may be used. Further, a cyclone centrifuge having a configuration other than the cyclone centrifuge 30 illustrated in FIGS. 2 and 3 can also be used.

  As shown in FIGS. 2 and 3, the dust sucked from the suction port 11 is introduced into the cyclone centrifugal device 30 from the inlet pipe portion 12 a connected to the pipe line (path) 12. The dust introduced into the cyclone centrifuge 30 is a swirling flow that rotates around the central axis AX along a certain direction (direction D1) in the first space 35a between the outer cylinder 31 and the inner cylinder 32. Become.

  Among the dust that rotates along the direction D1 in the first space 35a, the heavy one falls to the second space 35b below the first space 35a (direction D2 in FIG. 3). On the other hand, the fine dust having a small weight is introduced into the cyclone from the cyclone inlet 33b through the third space 35c between the inner cylinder 32 and the horn-shaped second cyclone 33a that becomes narrower as it goes downward. (Direction D3 in FIG. 3).

  The fine dust guided into the cyclone rotates at high speed around the central axis AX in the fourth space 35d inside the second cyclone 33a (direction D4 in FIGS. 2 and 3). Among the fine dusts that swirl at high speed in the fourth space 35d, the heavy dust falls into the fifth space 35e located below the fourth space 35d (direction D5 in FIG. 3). The fifth space 35e is separated from the second space 35b by a substantially cylindrical partition wall 34.

As shown in FIG. 3, the cyclone centrifuge 30 is provided with a seal packing 37, and the bottom wall 36 is rotatable by a hinge 38 provided at an end thereof, and can be opened and closed by a manual toggle clamp. Underneath, a collection container such as a bucket or a plastic bag is arranged below. Therefore, the dust that has fallen and accumulated in the second space 35b and the fifth space 35e can be easily recovered by opening the bottom wall 36 and dropping it into a recovery container or the like.
Moreover, it is preferable to enclose the lower part of the cyclone-type centrifuge 30 including the outer peripheral surface of the outer cylinder 31 with a plastic bag or the like so that the accumulated dust is not scattered around. Further, a hose or the like may be connected to the lower portion of the bottom wall 36 to collect dust.

  On the other hand, among the fine dust swirling at high speed in the fourth space 35d, the ultrafine dust having a small weight is discharged to the outside of the cyclone centrifugal device 30 from the outlet pipe portion 12b extending upward from the upper portion of the fourth space 35d. (Direction D6 in FIGS. 2 and 3). The outlet pipe portion 12 b is continuous with the pipe line (route) 12.

  Here, the cyclone centrifugal separator 30 is manufactured by bending a metal flat plate. For this reason, compared with the manufacture by the conventional lathe process, size reduction and weight reduction can be achieved. In addition, since the number of connection points can be reduced, the resistance to fluid, which is likely to occur at such points, can be greatly reduced, so that it is possible to increase the collection efficiency without hindering the swirling and progression of dust. Moreover, durability higher than the case where a plastic is used can be acquired. The size of the cyclone centrifuge 30 can be, for example, about 90 mm in diameter and 370 mm in length, and a highly durable cyclone centrifuge can be manufactured.

  In a plan view seen from above, the cyclone centrifuge 30 has a substantially circular shape, and the inlet pipe portion 12a is connected to the outer periphery thereof, thereby making it easy to generate a swirling flow of dust and being heavy before reaching the cyclone. Objects are dropped into the second space 35b to facilitate separation. Furthermore, by providing the second cyclone 33a in the space separated from the outside by the inner cylinder 32, it becomes possible to efficiently generate high-speed turning in the cyclone, thereby increasing dust collection efficiency. . Further, in the region surrounded by the inner cylinder 32, the outlet pipe portion 12b is provided so as to escape upward at a position corresponding to the center of the cyclonic centrifuge 30 in plan view, so that only fine dust is discharged from the outlet pipe. It will be attracted | sucked to the dust sludge collection | recovery part 50 side through the part 12b.

<Water spray part 40>
99% or more of the dust sucked from the suction port 11 can be collected by the cyclone centrifugal device 30 which is a dry dust collecting method. However, it is difficult to collect all the dust. Therefore, the fine dust that could not be collected is collected in the dust sludge collection unit 50 disposed downstream of the cyclone centrifugal separator 30. In order to collect more in the dust sludge collection unit 50, the water spray unit 40 is disposed immediately before the dust sludge collection unit 50, and fine dust is mudified by spraying water in the water spray unit 40.

  As shown in FIG. 4, the water spray section 40 has a tubular shape that is coupled to a pipe line (path) 12 via a connecting pipe 13, and a spray nozzle 41 is attached to a hole that penetrates the side surface. . A spray pipe 83 extending from the water tank 80 is connected to the spray nozzle 41. Water of a predetermined pressure is supplied from the water tank 80 to the spray pipe 83 through the water spray pump 81.

  On the other hand, as shown in FIGS. 4A and 4B, the spray nozzle 41 is connected to a nozzle holder (with packing) 44 via a nipple 43. Further, the nozzle holder (with packing) 44 is fixed to the water spraying portion 40 branched from the pipe line (path) 12 by a currant 45.

  Furthermore, since the spray nozzle 41 fixed by the currant 45 is configured as described above, it can be easily removed from the water spray section 40, and repairs such as when the spray nozzle 41 is clogged can be easily performed. The amount and pressure of water supplied into the water spray unit 40 can be adjusted by the water spray pump 81. However, if nozzles of various sizes are prepared in advance, they can be adjusted by replacing the nozzles. Furthermore, it is preferable that the water spray unit 40 is made of a transparent material because the state of dust muddy in the water spray unit 40 can be confirmed. The number of spray nozzles 41 may be one or two or more. Here, as the amount of water for reducing the amount of dust sludge and recovering efficiently, for example, 50 to 200 mL / min per nozzle is preferable.

  The spray hole 42 of the spray nozzle 41 is sprayed so as to shield the pipe (route) 12, that is, the vertical direction with respect to the pipe (route) 12 (vertical direction in FIG. 4B). Installed. Furthermore, it is preferable that the powder passing through the pipe line (route) 12 is evenly contacted with water by making the spray into a fan shape.

  Further, the arrangement and number of spray nozzles 41 are preferably as follows. First, when the spray nozzle 41 is in the pipe line (path) 12, the spray nozzle 41 may become a fluid obstruction, and dust accumulates in a state where it is caught by the obstruction. It may be blocked and sprayed. On the other hand, increasing the amount of sprayed water increases the amount of dust sludge, which is not preferable for the recovery process. Therefore, the spray nozzle 41 in the dust collection system 10 has a structure that does not protrude into the pipe line (path) 12. The number of the spray nozzles is basically one, and an optimum injection angle is considered.

<Turbulent flow generator 70>
In order to efficiently collect the dust sludge in the dust sludge collecting unit 50 and reduce the amount of dust collected in the filter unit 60, in the pipeline (path) 12, immediately after the water spraying unit 40, the dust sludge collecting unit 50 A turbulent flow generation unit 70 is provided in front (see FIG. 4). By providing the turbulent flow generation unit 70, the turbulent flow is generated by including the turbulence in the dust flow from the cyclone centrifugal separator 30 to the dust sludge recovery unit 50. By generating the turbulent flow, the water sprayed in the water spray unit 40 can be brought into contact with a wide range of dust, so that more moisture can be included in the dust. Therefore, the dust collection efficiency in the dust sludge collection unit 50 can be increased.

  In the turbulent flow generation unit 70, the water spray unit 40 side (upstream side) is provided with a groove portion 71 formed of a spiral groove formed around the inner peripheral surface of the pipe (path) 12 in the circumferential direction. The brush part 72 is fixed in the pipe line (path) 12 on the dust sludge collecting part 50 side (downstream side) from 71. The groove portion 71 is formed in a screw shape at an inclined angle except for parallel and right angles with respect to the direction in which the pipe line (path) 12 extends from the cyclone centrifugal separator 30 side to the dust sludge collecting portion 50 side. It is formed at a predetermined pitch of 2 to 10 mm in the axial direction of the path (path) 12. The brush portion 72 is mechanically durable against the flow of dust and is made of a material having a high rust prevention property. The brush portion 72 is made up of a large number of rods extending along the direction in which the pipe line (path) 12 extends. The branch material has a configuration extending outward.

  The turbulent flow generation unit 70 is not limited to the configuration shown in the present embodiment as long as the turbulence can be included in the flow of the dust flowing toward the dust sludge collection unit 50. In addition to the above-described spiral groove (screw) and brush, for example, one or a plurality of mesh portions may be provided in the middle of the pipeline (route) 12 so as to intersect the pipeline (route) 12. The mesh size of the mesh portion is appropriately set according to the assumed dust size. Moreover, you may arrange | position several blade-shaped members in a pipe line like a propeller.

  The position of the turbulent flow generation unit 70 is not only immediately after the water spray unit 40 as in this embodiment, but also between the cyclone centrifuge 30 and the water spray unit 40, or between the water spray unit 40 and the dust sludge recovery unit 50. May be provided in an intermediate region between the two and a plurality of these positions (regions) may be combined. Moreover, it is good also as a structure which connected the spray nozzle to the pipe line which provides a turbulent flow generation part, and provided the water spray part in the turbulent flow generation part by this.

  In the present embodiment, the turbulent flow generation unit 70 is configured by two units of the groove unit 71 and the brush unit 72. However, the size of the dust to be recovered, the cyclone centrifugal separator 30, the dust sludge recovery unit 50, and the filter unit 60 are included. Depending on the configuration, one unit may be used, or three or more units may be used.

  In addition, the distance from the turbulent flow generating unit 70 to the inlet pipe 12c is such that the turbulent flow generated by the turbulent flow generating unit 70 is maintained and dust is guided into the dust sludge collecting unit 50 in the turbulent state. It is preferable to set. Thereby, the dust collection efficiency in the dust sludge collection unit 50 can be increased.

<Dust sludge collection part 50>
The pipe line (path) 12 provided with the turbulent flow generation part 70 is bent at a right angle downstream thereof and connected to the inlet pipe part 12 c of the dust sludge recovery part 50. The dust sludge collection unit 50 collects and discharges the dust sludge that has been muddy by the water spray unit 40. In other words, fine dust that has not been collected by the cyclone centrifuge 30 is converted into dust sludge in the water spray unit 40 and recovered in the dust sludge recovery unit 50. By collecting in the dust sludge collecting unit 50, the amount of fine dust flowing into the filter unit 60 corresponding to the next step can be reduced. For this reason, the lifetime of the filter 62 based on a HEPA filter and a HEPA filter can be extended, and the danger of discharge | emission of the dust outside the dust collection system 10 can be reduced simultaneously. Further, as described above, in the path to the inlet pipe section 12c of the dust sludge recovery section 50, the pipe path (path) 12 is bent at a right angle. It is easy to get wet.

  As shown in FIG. 1, the dust sludge collection | recovery part 50 is provided with the can body 51 with the substantially cylindrical shape and bottom which the inlet pipe part 12c was connected to the upper part. An outlet pipe portion 12 d is provided on the peripheral side surface of the can body 51, and a pipe line (path) 12 connected to the downstream filter portion 60 is connected thereto.

  An overflow discharge port 52 is provided at a predetermined height position of the can 51. The overflow discharge port 52 is connected to an overflow line and further connected to an overflow tank (both not shown). As the overflow tank, for example, a pail can having a suction port and an inflow port, a view filter manufactured by Clintech Koizumi Co., Ltd., a hydro filter manufactured by Interlink Supply (USA), or the like can be used. A float is attached to the drainage inlet of the overflow tank. When the drainage is filled and the float rises, the drainage outlet is blocked by the float and the drainage does not overflow from the overflow tank.

  The can body 51 is provided with a water level sensor 53. The water level sensor 53 is provided at a position higher than the overflow outlet 52 on the inner peripheral surface of the can 51, and is electrically connected to the base box 14 and the water spray pump 81 by a sensor connection cable 82. .

  Sludge and sewage are gradually stored in the can 51 as the process proceeds. When the water level sensor 53 is stored, the water level sensor 53 detects the storage state. The detection signals are output to the base box 14 and the water spray pump 81, respectively. In the base box 14, a warning is displayed, a warning sound is generated, and the water spray pump 81 supplies water to the water spray unit 40. Supply is stopped. Thereby, it is possible to prevent the sludge and sewage from being further stored in the can 51.

  Here, in the pipe line (path) 12, each part (the cyclone type centrifugal separator 30, the water spray part 40, the dust sludge recovery part 50, the filter part 60, the turbulent flow generation part 70), the outlet of the spray pipe 83, etc. A sensor for detecting dust and the amount of dust sludge may be provided. Thereby, since it can detect that the dust sludge accumulate | stored in the pipe line (path | route) 12 etc., the malfunction in the applicable location can be prevented or it can respond quickly. As this sensor, an optical sensor, an air volume sensor, a flow rate sensor, a dust sensor, or the like can be used.

  In the can 51, a shielding plate 54 is provided at a position higher than the overflow outlet 52 and the water level sensor 53. The shielding plate 54 is provided below the outlet pipe portion 12 d of the pipe line (route) 12 so as to extend inward from the inner peripheral surface of the can body 51. The shielding plate 54 is provided in a range that does not prevent the dust introduced from the inlet pipe portion 12 c from falling below the can body 51.

  In the dust sludge recovery unit 50, in addition to the dust that has become sludge in the water spray unit 40, the water sprayed by the water spray unit 40 is not sufficiently adsorbed, and the can remains as a dry, non-sludge fine dust. Some of them reach 51. Some of these fine dusts are mixed with sludge dust and collected in the can 51, but some are directed to the outlet pipe portion 12d in a non-sludge state. On the other hand, by providing the shielding plate 54 in the vicinity of the outlet pipe portion 12d, it is possible to prevent fine dust in a non-sludge state from moving toward the outlet pipe portion 12d. By falling in the body 51, it becomes possible to mix with sludge dust. By making such a flow of fine dust, the amount collected in the dust sludge collection unit 50 can be increased, and therefore the amount of fine powder flowing to the filter unit 60 via the outlet pipe portion 12d can be reduced.

  In the example shown in FIG. 1, the shielding plate 54 is provided in the vicinity of the outlet pipe portion 12d and below the outlet pipe portion 12d. However, if the shielding plate 54 is provided also on the path connecting the inlet pipe portion 12c and the outlet pipe portion 12d. It is preferable because fine dust in a non-sludge state can be prevented from being directly sucked from the inlet pipe portion 12c to the outlet pipe portion 12d. On the other hand, by extending the inlet pipe 12c downward and contacting or burying sludge and sewage stored in the can 51, the can 51 collects almost dry fine dust carried from the inlet pipe 12c as much as possible. it can.

<Filter part 60>
The filter unit 60 includes a replaceable HEPA filter and a filter 62 based on the HEPA filter, and collects fine dust that has not been collected in the process up to the dust sludge collection unit 50. The HEPA filter and the filter 62 conforming to the HEPA filter are provided at the inlet of the suction device 20 in a state of being disposed in the filter housing 61. By providing the filter unit 60, it is possible to prevent fine dust flowing through the pipe line (path) 12 from flowing into the suction device 20, and thus it is possible to prevent a failure of the suction device 20. Furthermore, it has an effect of reducing fine dust contained in the exhaust discharged from the suction device 20.

  In place of the HEPA filter and the filter 62 conforming to the HEPA filter, it is conceivable to use a filter made of paper or the like and capable of collecting fine dust. However, considering the collection efficiency of fine dust, the filter conforms to the HEPA filter and the HEPA filter. It is desirable to use a filter 62. For example, in the case of paper filters, in addition to the reduction in the collection rate of fine dust, in many cases, the bag binding part is often adhered with an adhesive, and depending on the amount of fine dust flowing in and the suction force, the adhesion May be damaged. On the other hand, the HEPA filter and the filter 62 based on the HEPA filter have a bag shape or a shape that can be stored inside the air-permeable cartridge so that the stitched portion can withstand the vacuum pressure and the air volume. Is manufactured. As such a HEPA filter, for example, a micro magic high hepa filter manufactured by Kirby (USA) may be used. In addition, as a filter conforming to the HEPA filter, TR-UME manufactured by Nakao Filter Co., Ltd., TR1535-1-50CB manufactured by the same company, and Tetlatex ePTFE membrane manufactured by the same company may be used. The filter housing 61 preferably has a transparent or translucent property made of acrylic or the like and has a function of confirming the inside. Accordingly, when the HEPA filter and the filter 62 based on the HEPA filter are clogged or damaged, it is easy to make a quick determination, and it is easy to prevent the dust from being sucked into the suction device 20.

  Hereinafter, the operational effects relating to the present embodiment will be described. FIG. 6 is a table showing the amount of dust collected by the filter unit in a configuration in which the presence / absence of the cyclone centrifuge, the water spray unit, the dust sludge collection unit, the filter unit, and the suction device and the arrangement order are changed. FIG. 7 is a table showing the amount of dust recovered in a configuration with and without a turbulent flow generation unit.

Configurations 1, 2, and 3 shown in FIG. 6 are as follows. The arrow indicates the flow of dust by the suction device. A HEPA filter is used in the filter unit. In either configuration, no turbulent flow generation unit is provided.
(1) Configuration 1
It is the structure arrange | positioned in the same order as the dust collection system 10 of this embodiment. Similar to the dust collection system 10, the water spraying unit is disposed immediately before the dust sludge recovery unit.
Suction port → Cyclone centrifugal separator → Water spray part → Dust sludge recovery part → Filter part → Suction device (2) Configuration 2
Suction port-> water spray part-> cyclone centrifuge-> filter part-> suction device (3) Configuration 3
Suction port → cyclone centrifuge → filter unit → suction device

The devices, members, conditions, etc. used in each configuration shown in FIG. 6 are as follows.
Suction device: two motors mounted in series, AMETEK motor 116119-00
Dust to suck: Cold water powder, 1kg
Suction time: 5 minutes Amount of water sprayed at the water spray section: 200 ml / min Suction port (suction hose): Inner diameter 38 mm, length 10 m
Cyclone centrifuge: GL PS manufactured by HTC (Sweden)

  As shown in FIG. 6, the recovery amount in the configuration 3 having no water spraying portion was 29 g, and the recovery amount in the configuration 2 in which the water spraying portion was arranged in front of the cyclone centrifugal device was 22 g. On the other hand, the recovery amount in the configuration 1 in which the water spray portion was arranged after the cyclone centrifugal device was 11 g.

  From the results shown in FIG. 6, it can be seen that dust can be sludged by providing a water spray part first, and thus it is easy to collect at a stage before the filter part. Furthermore, it can be seen that by providing the water spray section after the cyclone centrifugal separator and then providing the dust sludge collection section, the amount of collection at the stage before the filter section can be further increased. Thus, by reducing the collection amount in the filter unit, it is possible to reduce the burden on the suction device, and it is possible to reduce the proportion of dust mixed into the exhaust from the suction device.

  Based on the results shown in FIG. 6, in the dust collection system 10 of the present embodiment, the dry dust collection method using the cyclone centrifugal device 30, the water spray unit 40, and the dust sludge recovery unit 50 are provided in the same manner as in the above configuration 1. The wet dust collection method arranged in order after the cyclone type centrifugal separator 30 was used in combination. With this arrangement, the dust collection system 10 does not place an excessive burden on the HEPA filter and the filter 62 conforming to the HEPA filter, so that the risk of the sucked dust being discharged out of the dust collection system 10 is greatly increased. Can be reduced.

FIG. 7 shows the results of dust collection for the following two configurations A and B. The following configuration A uses the dust collection system 10 of this embodiment, and the configuration B is a configuration obtained by removing the turbulent flow generation unit from the configuration A.
(1) Configuration A: Suction port → Cyclone centrifugal device → Water spray unit → Turbulent flow generation unit → Dust sludge recovery unit → Filter unit → Suction device (2) Configuration B: Suction port → Cyclone centrifugal device → Water Spray section → dust sludge collection section → filter section → suction device

  As the turbulent flow generation part, a cuff (length) having a groove of 4 to 6 mm on the inner peripheral surface of the cylinder so as to increase the ratio of causing turbulent flow in the cylinder and allowing the dust to contact the spray water vertically. 3 cm) and a brush (length: 13 cm, diameter: 4 cm).

The devices, members, conditions, etc. used in each configuration shown in FIG. 7 are as follows.
Suction device: 3 motors in series, AMETEK motor 116119-00
Dust to suck: Concrete block dust, 2kg
Suction time: 10 minutes Operating conditions of suction device: voltage 100V, frequency 50Hz
Amount of water sprayed at the water spray section: 200 ml / min Suction port (suction hose): inner diameter 38 mm, length 10 m
Spray angle (spreading angle) of spray nozzle of water spray section: 50 degrees

  As shown in FIG. 7, the recovery amount in the cyclone centrifugal separator is almost the same as that in Configuration A and Configuration B. On the other hand, the amount of recovery by the HEPA filter is clearly smaller in the configuration A in which the turbulent flow generation unit is provided than in the configuration B. Therefore, it can be seen that the recovery rate in the dust sludge recovery part is increased by providing the turbulent flow generation part. This is because even if there is dust where water is not sufficiently adhered in the water spraying section, the turbulent flow generation section causes a disturbance in the flow of the dust, thereby bringing a lot of water into contact with the dust that has not been sludged. It is considered possible. Therefore, if a turbulent flow generation unit is provided as in configuration A, the cyclone centrifuge and the dust sludge recovery unit recover dust of 99.9% or more of the total suction amount, so the filter unit is clogged. In addition, it is possible to sufficiently prevent dust from leaking from the exhaust port of the suction device. Therefore, it can contribute to the improvement of the working environment at the work site, and it can be seen that the turbulence generator is effective in improving the performance of the dust collection system 10.

The cyclone centrifuge 30, the water spray unit 40, the turbulent flow generation unit 70, the dust sludge recovery unit 50, and the filter unit 60, which constitute the dust collection system 10, are independent of each other as a pipe line (path) 12. Are used in combination. For this reason, each can be taken out and a maintenance check and repair can be performed simply. Moreover, in each part and each apparatus, it can replace easily with the apparatus etc. of an appropriate specification according to the kind etc. of the dust to collect | recover. Furthermore, by using a miniaturized device or the like in each unit / device, the dust collection system 10 as a whole can be reduced in size and weight. Thereby, the mobility which can be conveyed to the spot by a small truck etc. is acquired. In addition, because of its small size, it can be used at any work site such as a small site, a narrow site, and a high site.
Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or modified within the scope of the purpose of the improvement or the idea of the present invention.

  As described above, the dust collection system according to the present invention can collect dust efficiently and is useful in terms of simplification of maintenance and inspection.

10 Dust Collection System 11 Suction Port 12 Pipe Line (Route)
12a, 12c Inlet pipe part 12b, 12d Outlet pipe part 13 Connection pipe 14 Base box (operation panel)
DESCRIPTION OF SYMBOLS 20 Suction apparatus 30 Cyclone type centrifuge 31 Outer cylinder 32 Inner cylinder 33a 2nd cyclone 33b Cyclone inlet 34 Partition 35a 1st space 35b 2nd space 35c 3rd space 35d 4th space 35e 5th space 36 Bottom wall 37 Seal packing 38 Hinge 40 Water spray part 41 Spray nozzle 42 Spray hole 43 Nipple 44 Nozzle holder (with packing)
45 Karan (fastened)
46 Coupler 50 Dust sludge recovery part 51 Can body 52 Overflow outlet 53 Water level sensor 54 Shield plate 60 Filter part 61 Filter housing 62 HEPA filter and filter according to HEPA filter 70 Turbulence generating part 71 Groove part 72 Brush part 80 Water tank 81 Water spray pump 82 Sensor connection cable 83 Spray tube

Claims (9)

A dust collection system that sucks dust from a suction port by a suction force of a suction device,
In the path from the suction port side to the suction device side,
A cyclone centrifuge that collects the dust sucked from the suction port;
A water spray section that muds dust by spraying water;
A dust sludge recovery section for recovering dust sludge;
A filter unit for collecting fine dust,
Are provided in order,
A dust collection system comprising: a turbulent flow generation unit that includes turbulence in a dust flow sucked from the suction port and not collected by the cyclone centrifugal device.   The dust collection system according to claim 1, wherein the filter unit includes a HEPA filter and a filter conforming to the HEPA filter.   The dust collection system according to claim 1 or 2, wherein the turbulent flow generation unit is provided between the water spray unit and the dust sludge recovery unit.   The dust collection system according to any one of claims 1 to 3, wherein the turbulent flow generation unit is provided between the cyclone centrifugal separator and the water spray unit.   The dust collection system according to any one of claims 1 to 4, wherein the water spray unit is provided in the turbulent flow generation unit.   The dust collection unit according to any one of claims 1 to 5, wherein the turbulent flow generation unit includes a spiral groove formed around the inner circumferential surface of the pipe portion extending along the path. system.   The dust collection according to any one of claims 1 to 6, wherein the turbulent flow generation part is formed by providing a mesh part in a pipe part extending along the path so as to intersect the path. system.   The dust collection system according to any one of claims 1 to 7, wherein the turbulent flow generation section is formed by arranging a plurality of blade-like members in a pipe section extending along the path.   The said water spray part is equipped with the spray nozzle which sprays water, and the said spray nozzle has comprised the structure which can spray in the fan shape which has a spreading angle, The dust collection of any one of Claims 1-8. system.