JP2010120007A - Wet dust collection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wet dust collection device with structure of sucking dust-containing air and bringing it into contact with water in the device to collect dust, being small and lightweight, having low cost, resolving every problem caused by bubble generation. <P>SOLUTION: The wet dust collection device includes a vessel storing water, an exhaust unit covering an upper opening of the vessel, a suction pipe fixed to the exhaust unit, suspended in the vessel and opened in the water, a suction force generation device placed in the suction pipe and generating the suction force, a cylindrical body disposed on the outer periphery of the suction pipe for the purpose of forming a water path, with a lower end opening extended lower than a lower end opening of the suction pipe and having a discharge port above the water level, and a shielding plate fixed to the cylindrical body above the discharge port. A bubble capturing means is disposed between the discharge port provided to the cylindrical body and the water level in the vessel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a structure of a wet dust collector that sucks dust-containing air and makes it come into contact with water in the device, thereby collecting dust.

Conventionally, as this type of wet dust collector, for example, those described in Patent Documents 1 to 4 are known. The thing of patent document 1 was equipped with the water reservoir, and was attracted | sucked by the bubble-breaking filter with which the opening part which guides the suction air to water was provided at the edge part of the guide tube which guides the suction air from a dust collection head. Bubbles with a large airflow are crushed into fine bubbles. In Patent Document 2, the suction duct is projected inward to a position where it does not contact the inner peripheral wall of the main body, and the tip of the suction duct is submerged below the water surface surrounded by water for collecting dust. In this structure, a perforated plate through which bubbles of dust-containing air pass is placed under the water surface near the water surface around the tip of the submersion. The thing of patent document 3 becomes a structure equipped with the bubble formation means which confine | sucks the sucked special garbage in a bubble, and the separation means which breaks a bubble forcibly and attaches special garbage to a water | moisture content, and is separated and removed. ing. The thing of the patent document 4 has the structure which makes the bubble which generate | occur | produced in the precipitation tank flow in into an adjacent circulation tank, and is defoamed with the water which falls into this circulation tank.

JP-A-10-128033 JP 2000-325725 A JP-A-10-272430 JP-A-5-337377

  By the way, when the dust-containing air is sucked and released into the water, the dust-containing air becomes bubbles, rises in the water, and is diffused from the water surface to the atmosphere. When the bubbles are brought into contact with water, the dust on the surface of the bubbles becomes water-containing or hydrophilic, so that it can be diffused and collected in the water. As this dust collection progresses, the turbidity of the water increases and the viscosity increases, making it difficult to remove bubbles, and various “water bubbles” are generated on the surface of the water. Etc., and the grains having a water film are called water bubbles). Since the amount of water bubbles generated is proportional to the turbidity, defoaming is a problem in this type of apparatus.

  The thing of patent document 1 has the problem that when the water bubbles which generate | occur | produced on the water surface gradually increase, it will become a lump and will pass through a splash prevention filter and will reach a paper pack filter, and a filter function will fall. In the case of Patent Document 2, when the water bubbles generated on the water surface gradually increase, it becomes a lump and rises in the main body, and some of the water bubbles are separated from the lump, get on the exhaust flow, and are sucked into the air exhaust device. There is a problem that causes adhesion or leakage of electricity. Although the thing of patent document 3 can defoam the generated water bubble with a centrifuge, there exists a problem that an apparatus will enlarge. In Patent Document 4, the water bubbles floating on the water surface of the circulation tank are defoamed by the falling water. However, since the water bubbles are floating on the water surface, even if the falling water hits, it escapes and smoothly disappears. There is a problem that bubbles cannot be formed.

The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a wet dust collector in which various problems caused by generation of water bubbles are eliminated while being small in size and light in weight. By the way.

  As means for achieving the above object, a container for storing water, an exhaust unit that covers the upper surface opening of the container, and a suction pipe that is fixed to the exhaust unit and hangs down into the container and opens below the surface of the water. A suction force generating device that is interposed in the suction pipe and generates a suction force, and is arranged to form a water passage on the outer periphery of the suction pipe and has a lower end opening extending from the lower end opening of the suction pipe and a water surface A cylindrical body provided with a drain port on the top, and a shielding plate fixed to the cylindrical body above the drain port, between the drain port provided in the cylindrical body and the water surface in the container It was set as the structure by which the water bubble capture | acquisition means which comprises a filter is arrange | positioned.

  That is, the device of the present invention includes a container for storing water, an exhaust unit, a suction pipe, a suction force generation device, a cylinder, a shielding plate, and a water bubble capturing means.When the suction force generation device is driven, Dust-containing air is discharged into the water stored in the container through the suction pipe, and the water bubbles rise through the cylinder and are discharged from the drain outlet provided at a position higher than the water surface. Once trapped by the water bubble trapping means, dust or the like is attached by a filter disposed here to purify the air.

  Therefore, the “cylinder” is disposed on the outer periphery of the suction pipe. A water passage is formed between the outer peripheral surface of the suction pipe and the peripheral surface of the cylinder. Furthermore, the lower end opening of the cylinder extends below the lower end opening of the suction pipe. And the drain outlet is carved in the radial direction in the position higher than the water surface of a cylinder upper part.

  The “water bubble capturing means” is a structural part that is disposed inside the container and at a position above the water surface of the water stored in the container. It has a function of receiving water mixed with water bubbles discharged from the drain outlet of the cylindrical body and not easily moving each water bubble once it is gripped. The specific structure for providing this function is not particularly limited, and for example, a structure such as a wire mesh or a punching metal is typical.

Further, the water bubble capturing means has a filter that allows water to pass out of the water and water bubbles released from the cylindrical body, and the water bubbles to adhere and hold. Dust-mixed water bubbles whose movement is restricted by this filter are extinguished (ruptured) by being directly hit by the water discharged from the drainage port of the cylinder, and the dust inside is scattered together with the air and disappears. Part of the dust scattered at that time is in direct contact with the falling water, the other is once attached to the filter and captured, and then washed away by the falling water and moved into the water of the container.

The dust-containing air discharged into the water in the container rises as a water bubble and rises through the water passage in the cylinder, and is released to the water bubble capturing means located at a position away from the water surface, where the water bubble breaks and the dust in the water bubble Will be sprayed with water. And the filter provided with the water bubble capture | acquisition means adsorb | sucks this dust.
Therefore, the wet dust collector according to the present invention is different from a conventional method for collecting dust by making air-water contact by discharging bubbles to water stored in a container,
(1) There is no need to subdivide the bubbles.
(2) Since it is not necessary to subdivide the bubbles, the problem that the generated water bubbles are difficult to break is less likely to occur.
It has the characteristics.
Also, since the air discharged into the water rises along the water passage in the cylinder, large dust and heavy dust will remain in the water, but for fine dust that causes water quality deterioration, It will be discharged on the water bubble capturing means away from the water surface while being confined in the water bubbles. Therefore,
(3) Since the pollution rate of water stored in the container is reduced, the frequency of disposal of contaminated water is reduced.
Further, in the case of the device of the present invention, all members other than the drive source and the container, that is, the exhaust unit, the suction pipe, the cylinder, the shielding plate, and the water bubble capturing means are easily integrated in a vertically stacked structure. This is an extremely advanced invention that can be expected to have secondary effects such as easy separation work for maintenance such as filter replacement and dust removal, and easy reduction in size and weight.

Schematic sectional drawing which shows the internal structure of the wet dust collector which concerns on one Embodiment of this invention. Schematic sectional view of the state divided into two Schematic sectional view of the state at the start of operation Schematic cross-sectional view of the state near the end of dust collection work Perspective view of suction pipe unit Perspective view of exhaust unit Perspective view of cylindrical unit Perspective view of container

Hereinafter, the present invention will be described in detail based on examples.

1 to 8 show one embodiment of the present invention.
As shown in FIGS. 1 and 8, an exhaust unit 11 having a bottom portion of the same shape is attached to the upper surface opening of a cylindrical container 10 having an upper surface opening. The container 10 and the exhaust unit 11 are fastened by metal fittings (not shown). As shown in FIG. 6, the exhaust unit 11 includes a lid 12 made of a metal plate and a donut-shaped filter 13 made of a non-woven fiber, urethane, or the like that is detachably mounted inside. The lid 12 includes a top plate 12A, a side plate 12B, and a bottom plate 12C. A large number of vent holes 12D are formed in the side plate 12B, and a large-diameter bottom hole 12E is formed in the center of the bottom plate 12C. Yes. The filter 13 is extendable and detachable from the bottom hole 12E. A ring fitting 15 for fitting the suction pipe 14 is constituted by the fittings 15A and 15B and is fastened and fixed to the upper surface plate 12A. The inner diameter dimension of the through hole of the metal fitting 15B is preferably slightly larger than the outer diameter dimension of the suction pipe 14 (for example, about 0.2 to 0.3 mm larger).

  Further, on the upper surface plate 12A, a cylindrical body 17 attached with a bolt 16 is suspended in a hole 12F opened concentrically with the through hole of the metal fitting 15B. As shown in FIG. 7, the cylindrical body 17 has a cylindrical shape, and a flange 17 </ b> A is formed at the upper end portion and is fixed by a bolt 16.

  The total length of the cylindrical body 17 is such that the dimension from the upper surface plate 12A to the opening end of the container 10 and the substantially intermediate level L2 of the water depth at a position below the level of the water surface L0 set below the opening end of the container 10 by a predetermined dimension L1. Is set to the total dimension. Further, a drain port 17C is formed in all directions with the level L3 above the water surface L0 as the central axis. A shielding plate 18 is fixed to the outer wall of the cylindrical body 17 near the upper end of the drain port 17C. The shielding plate 18 has a disk shape and is smaller in diameter than the inner diameter of the container 10. Although not shown, ribs extending downward are formed on the lower surface in a number of outward directions, and when water sprayed from the drain port 17 </ b> C comes into contact with the shielding plate 18. It can be dropped down. A water bubble capturing means 19 is disposed near the lower end of the drain port 17C.

  The water bubble trapping means 19 is a filter medium filter (Musashino Giken Co., Ltd.) having a disk shape and a diameter slightly smaller than the inner diameter of the container 10 and having the same diameter as the perforated plate 19A and three-dimensionally intersecting polyvinylidene chloride fibers. Company product name; Kureharon Lock (thickness: about 50 mm) 19B. The porous plate 19A is fixed to the outer wall of the cylindrical body 17, and the filter medium filter 19B is supported by a holder 20 fixed to the outer wall of the cylindrical body 17. The filter medium filter 19B has a donut shape and can be replaced when the inner hole is enlarged and attached.

  As shown in FIG. 5, the suction pipe 14 is an L-shaped pipe that is vertically inserted into the cylindrical body 17, and has a smaller diameter than the inner diameter of the cylindrical body 17. A water passage 24 is formed. Further, the lower end opening 14A of the vertical portion is opened so that it can be directly discharged into water when relatively large dust such as pebbles or metal pieces is sucked. In addition, a small-diameter hole 14B is bored at a position L5 above the predetermined dimension from the lower end opening 14A in all directions and in a plurality of stages. The plurality of holes 14B are for discharging the sucked dust-containing air in the horizontal direction in water (hereinafter, the lower end opening 14A and the plurality of holes 14B are collectively referred to as a lower end opening 14C). Further, a stopper 14D as a positioning member is formed and fixed in a donut shape having an outer diameter of the suction pipe 14 as an inner diameter above the vertical portion. The fixing position of the stopper 14D is such that the lower end opening 14A faces the upper position L4 of a predetermined dimension from the lower end opening 17B of the cylindrical body 17. An O-ring (not shown) is attached to the lower end surface of the stopper 14D, and comes into contact with the metal fitting 15B to prevent water leakage.

  A suction force generating device 21 is interposed in the horizontal portion of the suction pipe 14 to suck the dust-containing air into the suction pipe 14. A high pressure air pipe 23 with an air amount adjusting valve 22 interposed is connected to the suction force generating device 21. When high pressure air is supplied from the high pressure air pipe 23 to the suction force generating device 21, it is provided inside. The narrow pipe is sprayed toward the lower end opening 14A side of the suction pipe 14, a negative pressure is generated by the Benchery effect, and a suction force is applied to the suction pipe 14. Here, negative pressure is generated on the upstream side of the suction force generating device 21, but since high-pressure air is supplied on the downstream side, the pressure becomes higher than atmospheric pressure and is discharged from the lower end opening 14 </ b> A. Therefore, the ventilation path until the dust-containing air is exhausted from the exhaust unit 11 is in a pressure state higher than the atmospheric pressure.

  The suction pipe 14 is formed in an L shape so that it is inserted into the through hole of the metal fitting 15B and can be rotated 360 degrees using a minute clearance with the through hole, and connected to the connection port 14E. This is because a hose (not shown) to be used can be routed and used.

Subsequently, the operation of the operation will be described.
As shown in FIG. 2, the exhaust unit 11 has a cylindrical body 17, a water bubble capturing means 19, and a shielding plate 18 mounted thereon, and a suction pipe 14 mounted thereon. It can be separated from the container 10 as a unit. In this state, water is poured up to the standard water level line engraved in the container 10, and then the exhaust unit 11 is placed in the container 10, and the exhaust unit 11 and the container 10 are fastened with a fastening bracket (not shown).

  Next, when high-pressure air adjusted by the air amount adjustment valve 22 is supplied from the high-pressure air pipe 23 to the suction force generator 21, negative pressure is generated and suction force is applied to the suction pipe 14. That is, a negative pressure is generated in the suction pipe 14 and the hose (not shown) on the upstream side of the suction force generating device 21, and an air flow higher than the atmospheric pressure is generated on the downstream side by injection of high-pressure air. A state diagram at that time is shown in FIG.

  In FIG. 3, the dust-containing air sucked into the suction pipe 14 is discharged from the lower end opening 14 </ b> C of the suction pipe 14 into the water in the water passage 24. The dust-containing air discharged from the plurality of holes 14B of the lower end opening 14C once falls but rises by buoyancy. At that time, since the lower end opening 17B of the cylinder 17 is located deeper in the water than the lower end opening 14C of the suction pipe 14, most of the dust-containing air remains in the cylinder 17. Therefore, the inside of the water flow path 24 rises as many water bubbles. Since the dust-containing air is continuously discharged, the water passage 24 is filled with a large number of water bubbles, and the upper water bubbles are discharged from the drain port 17C in the form of being pushed by the subsequent water bubbles. become.

  Most of the water bubbles discharged from the lower end opening 14C are torn at the stage of exiting from the drain port 17C, but a part of the water bubbles are discharged while maintaining the coating (that is, as water bubbles).

  The air discharged into the ventilation path 25 from the drain port 17C contains dust. However, since all the dust-containing air was trapped in the foam film until just before, the fine water droplets radiated when the self or the subsequent water bubbles were broken became mist, and the mist aggregated around the dust and the water droplets. It falls to the water bubble capturing means 19 by its own weight. Thus, the dust-containing air moves in the horizontal direction between the shielding plate 18 and the water bubble capturing means 19 as indicated by the arrow, and is almost cleaned in the process of passing through the gap formed between the shielding plate 18 and the container 10. Then, all the fine dust is removed by the filter 13 of the exhaust unit 11 and is discharged as clean air from the ventilation hole 12D.

  On the other hand, the dust-containing water discharged from the drain port 17C to the ventilation path 25 falls partly due to collision with the shielding plate 18, and the other is sprinkled on the water bubble capturing means 19 as indicated by a large arrow.

  A part of the water discharged on the water bubble capturing means 19 remains unruptured when the water bubbles generated in the water passage 24 are discharged from the drain port 17C. It is trapped in the mesh of the filter medium filter 19B. The size of the water bubbles is the same as that when some water bubbles are combined after being exhaled, and the size is the same as when they are exhaled. Small water bubbles that have passed through the holes of the porous plate 19A are trapped in the mesh of the filter medium filter 19B. In addition, the dust-containing water may contain dust having a low specific gravity, such as paper scraps, coating film pieces, and resin pieces. Among these dusts, those that cannot pass through the holes of the porous plate 19A are included in the porous plate 19A. It remains on the top, but it is easy to remove and easy to maintain.

  The amount of water bubbles captured by the water bubble capturing means 19 without rupturing increases in proportion to the contamination of the water in the container 10. The contamination of water is promoted by the contamination component moving to the water side when the dust-containing air comes into contact with air and water, but in the case of the device of the present invention, a large number of bubbles are released into the water. Although the method is not adopted, the air discharged into the water is quickly introduced into the water passage 24 of the cylindrical body 17, and the water present in the water passage 24 is brought into air-water contact. It is discharged from the drain port 17C. Accordingly, most of the water in the water passage 24 that is most polluted is discharged without being mixed with the water in the container 10 (strictly, it is not discharged, but passes through the filter medium filter 19B into the container 10. The water pollution rate is small. Therefore, although the amount of water bubbles captured by the water bubble capturing means 19 without being ruptured increases in proportion to the water contamination in the container 10, it is difficult to become dirty. Further, the water bubbles mixed with dust whose movement is restricted by the water bubble capturing means 19 are subjected to direct blow of water discharged from the drain port 17C of the cylindrical body 17 to be defoamed (ruptured), and the dust inside is surrounded with the air. Dissipate and disappear. Part of the dust scattered at that time is in direct contact with the falling water, and the other dust is once attached to the filter medium filter 19B and captured, then washed away by the falling water and moved into the water of the container 10.

  When dust collection is continued, dust accumulates as sludge at the bottom of the container 10, and the water level rises as the volume increases. The rising of the water level and the accumulation state of the sludge are detected by a water level sensor and a viewing window (not shown) to stop the dust collecting operation, and the exhaust unit 11 and others are separated from the container 10 as shown in FIG. . In the case of this example, the cleaning work is performed with respect to the container 10 by adding a flocculant and stirring to drain the upper layer water and the solidified sludge for industrial waste treatment. You may make it leave processing to an outside water treatment facility. On the other side of the exhaust unit 11, large dust captured by the water bubble capturing means is removed with a brush or the like and washed with water, and the filter 13 and the filter medium filter 19 </ b> B are replaced or washed.

  As described above, according to the present embodiment, the sucked-in dust-containing air does not directly agitate the stored water in the container, but becomes a water bubble and ascends the water passage 24. The water bubbles in contact with the water in the inside become turbid water and become a turbid water film is captured on the water surface, filtered through the filter medium filter 19B, and dropped onto the water surface.

The present invention is not limited to Example 1. For example, the following embodiments are also included in the technical scope of the present invention (these are listed as Example 2). Of course, various modifications other than those described below can be made without departing from the scope of the invention.
(1) Although the water passage is exemplified by the suction pipe and the double tube of the cylindrical body, the suction passage and the water passage may be configured by forming a facing passage in which one passage is divided by a partition plate.
(2) Although only the drainage port is provided in the middle of the water channel, a member for blocking the water channel above the water channel may be arranged.
(3) Although water is sucked from the lower end opening of the cylinder, the lower end opening may be closed to open the lower end side portion.
(4) The suction force generation device is not limited to an air compressor, and a device that generates suction force with an electric fan may be used.

DESCRIPTION OF SYMBOLS 10 Container 11 Exhaust unit 12 Cover 13 Filter 14 Suction pipe 15 Ring metal fitting 16 Bolt 17 Cylindrical body 18 Shielding board 19 Water bubble capture means 20 Holder 21 Suction force generator 22 Air quantity adjustment valve 23 High pressure air pipe 24 Water passage 25 Air passage

Claims (1)

A container for storing water;
An exhaust unit covering the top opening of the container;
A suction pipe which is fixed to the exhaust unit and hangs down in the container and opens below the water surface;
A suction force generator for generating suction force interposed in the suction pipe;
A cylindrical body arranged to form a water passage on the outer periphery of the suction pipe and having a lower end opening extending from the lower end opening of the suction pipe and having a drain outlet on the water surface;
A shielding plate fixed to the cylinder above the drain;
And a water bubble trapping means is disposed between the drain port provided in the cylinder and the water surface in the container.

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