Wet dust collector

Abstract

To provide a wet type dust collector capable of downsizing the device configuration, as well as, efficiently collecting dust.SOLUTION: One embodiment of the present invention includes: a container for containing a liquid; a cylinder portion extending in a vertical direction of the container and provided on the outside of the container and extending down to the middle of the inside of the container; a lower partition wall portion extending in the vertical direction in a region surrounding the outside of an outer periphery of the cylinder portion inside the container, and provided apart from the cylindrical portion in a radial direction of the cylindrical portion, and provided with a communication hole at a bottom and open at a top; an upper partition wall portion extending in the vertical direction in a region surrounding the outside of an outer periphery of the lower partition wall portion inside the container, and provided apart from the lower partition wall portion in the radial direction, and closed at a bottom and open at a top; and a ventilation portion for communicating with a space outside of the upper partition wall portion inside the container. The upper partition wall portion and the lower partition wall portion are arranged so as to partially overlap one another in the radial direction. An upper end of the lower partition wall portion is provided at a position higher than a lower end of the cylindrical potion. A lower end of the upper partition wall portion is provided at a position higher than the lower end portion of the cylindrical portion and lower than the upper end of the lower partition wall portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wet dust collector that removes dust and the like by bringing air containing dust and the like into contact with a liquid. [Background technology]

[0002] A wet dust collector (scrubber) is a device that removes dust, garbage, odors, impurities, etc. (hereinafter simply referred to as dust, etc.) contained in the exhaust gas of a treatment device, the air, etc., by contacting it with a liquid. Patent Document 1 discloses a deodorizing device that includes an introduction section that introduces the gas to be treated into an odor capture liquid, a gas-liquid mixing section that performs gas-liquid mixing of the gas to be treated with the odor capture liquid to remove odors in the gas to be treated, a liquid supply port for supplying the odor capture liquid, and a liquid discharge section that flows out and discharges the odor capture liquid that has captured the odor.

[0003] Patent Document 2 discloses a scrubber having a cleaning liquid container, a gas inlet pipe disposed in the container, and a partition wall, the gas inlet pipe having a plurality of blowing holes which are provided at different positions in the vertical direction, the side of the compartment being closed by the partition wall, and the partition wall having a through hole near its bottom through which the cleaning liquid flows. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-196120 A [Patent Document 2] JP 2004-113919 A Summary of the Invention [Problem to be solved by the invention]

[0005] In a wet dust collector, air containing dust and other particles is sucked in, brought into contact with liquid, and discharged while being agitated. In this case, the more scrubber points where the air containing dust and other particles come into contact with and agitate the liquid are increased, the higher the dust collection effect. However, increasing the number of scrubber points leads to an increase in the size of the equipment. Also, increasing the number of scrubber points increases the size of the container that seals the air and liquid, and in order to generate a scrubber, it is necessary to increase the pressure to suck in (or discharge) the air. This requires high capacity from the blower (or suction) device.

[0006] An object of the present invention is to provide a wet dust collector capable of reducing the size of the device and efficiently collecting dust. [Means for solving the problem]

[0007] One form of the present invention is a wet dust collection device comprising a container for holding a liquid, a cylindrical portion extending in the vertical direction of the container and being provided halfway from the outside of the container to the inside, a lower partition portion extending in the vertical direction inside the container in a region surrounding the outside of the outer periphery of the cylindrical portion, being spaced radially from the cylindrical portion, having a communicating hole at the lower portion and an open upper portion, an upper partition portion extending in the vertical direction inside the container in a region surrounding the outside of the outer periphery of the lower partition portion, being spaced radially from the lower partition portion, having a closed upper portion and an open lower portion, and a vent portion communicating with a space outside the upper partition portion inside the container, wherein the upper partition portion and the lower partition portion are arranged so that portions of them overlap radially, and the upper end of the lower partition portion is provided at a higher position than the lower end of the cylindrical portion, and the lower end of the upper partition portion is provided at a higher position than the lower end of the cylindrical portion and lower than the upper end of the lower partition portion.

[0008] In such a wet dust collector, when collecting dust, the pressure in the space of the container communicating with the ventilation section is made lower than the pressure in the tube section while the container contains liquid. As a result, air containing dust and the like sucked into the container from the tube section travels up and down between the tube section and the lower partition section, and between the lower partition section and the upper partition section, while moving in the circumferential direction while contacting the liquid, and is discharged from the ventilation section. At this time, a scrubber phenomenon occurs in which air and liquid are agitated at the lower end portion of the upper partition section. In addition, by providing the lower end of the upper partition section at a position higher than the lower end of the tube section and lower than the upper end of the lower partition section, the scrubber phenomenon can be generated simultaneously at multiple locations.

[0009] In the above wet dust collector, the cylinder, the upper partition and the lower partition are arranged concentrically with each other, and when the space between the cylinder and the lower partition is defined as the first space and the space between the lower partition and the upper partition is defined as the second space, the cross-sectional areas of the first space and the second space in the left-right direction are different from each other. When the air flow rate is the same, the air flow rate is slow in a space with a large area and fast in a space with a small area. As a result, the stirring phenomenon caused by the scrubber occurring at multiple locations is not uniform, and the air and liquid are stirred in different states, and a wide variety of dust contained in the air can be captured by the liquid. In addition, by reducing the cross-sectional areas of the first space and the second space, the distance between the partitions can be reduced, making it possible to construct more partition walls without changing the container size, and the contact path can be multi-staged.

[0010] In the above wet dust collector, it is preferable that the height of the lower end of the upper partition is set to a height such that, when air is sucked in through the ventilation part, the timing at which the level of the liquid in the cylindrical part reaches the lower end of the cylindrical part is substantially equal to the timing at which the level of the liquid inside the upper partition reaches the lower end of the upper partition, thereby making it possible to simultaneously generate the scrubber phenomenon at the lower end of the cylindrical part and the lower end of the upper partition.

[0011] In the above wet dust collector, the upper partition wall portion and the lower partition wall portion may each be provided in multiple stages, with the radially innermost lower partition wall portion being proximal to the cylindrical portion, and the multiple stages of the upper partition wall portion and the multiple stages of the lower partition wall portion may be arranged alternately in the radial direction, and the lower ends of the multiple stages of the upper partition wall portions may be arranged at higher positions toward the radially outer side. This allows the air and the liquid to come into contact with each other and be mixed uniformly on the lower surface of each path. In addition, by increasing the number of up and down reciprocations, the number of times that the air and the liquid are contacted and mixed at the lower end of the upper partition wall portion is increased, and as a result, the dust collection efficiency can be improved. In addition, even with a multiple stage configuration, the size of the device can be minimized while increasing the number of times that the air and the liquid are contacted and mixed.

[0012] In the above wet dust collector, the height of each upper end of the multi-stage lower partition wall may be made constant. This makes the heights of the upper ends of the multi-stage lower partition wall uniform, making it easier to set the path length of contact between air and liquid and the internal pressure depending on the height of the multi-stage upper partition wall. Also, a liquid spray function is added to the path where the scrubber effect is not generated.

[0013] In the wet dust collector, a turbulence generating section for disturbing the flow of the liquid may be provided at least one of the lower end of the tubular section and the lower end of the upper partition section, thereby enhancing the agitation effect between the air containing dust and the liquid when they come into contact with each other. Effect of the Invention

[0014] According to the present invention, it is possible to provide a wet dust collecting device that can reduce the size of the device configuration and perform efficient dust collection. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic cross-sectional view illustrating a wet dust collecting device according to a first embodiment. [Diagram 2] 1 is a schematic plan view illustrating a wet dust collecting device according to a first embodiment. [Diagram 3]1 is a schematic perspective view illustrating a main part of a wet dust collecting device according to a first embodiment. [Figure 4] 5A to 5C are schematic cross-sectional views illustrating the operation of the wet dust collecting device according to the first embodiment. [Diagram 5] FIG. 6 is a schematic cross-sectional view illustrating a wet dust collecting device according to a second embodiment. [Figure 6] 7A to 7C are schematic cross-sectional views illustrating the operation of a wet dust collecting device according to a second embodiment. [Figure 7] 4 is a schematic diagram illustrating a modified example (part 1) of the wet dust collecting device according to the present embodiment. FIG. [Figure 8] FIG. 11 is a schematic perspective view illustrating a modified example (part 2) of the wet dust collecting device according to the present embodiment. [Figure 9] FIG. 1 is a schematic diagram illustrating a dust collection system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same members are designated by the same reference numerals, and the description of members that have already been described will be omitted as appropriate.

[0017] (First embodiment) FIG. 1 is a schematic cross-sectional view illustrating a wet dust collecting device according to a first embodiment. FIG. 2 is a schematic plan view illustrating the wet dust collecting device according to the first embodiment. FIG. 3 is a schematic perspective view illustrating a main part of the wet dust collecting device according to the first embodiment. The wet dust collector 1A according to this embodiment is a device that sucks in air A containing dust and the like, mixes it with liquid L, and discharges air B from which the dust and the like has been removed. The wet dust collector 1A includes a container 10 that contains liquid L such as water, a tube section 20 extending in the vertical direction of the container 10, a lower partition section 30 extending in the vertical direction in a region surrounding the outside of the outer periphery of the tube section 20, an upper partition section 40 extending in the vertical direction in a region surrounding the outside of the outer periphery of the lower partition section 30, and a ventilation section 50 that communicates with the container. In this embodiment, the vertical direction is also referred to as the vertical direction, and the direction perpendicular to the vertical direction is also referred to as the left-right direction or radial direction.

[0018] The container 10 has a bottom 11, a lid 12, and a side wall 13. The tube portion 20 is provided so as to penetrate the lid 12 and extend in the vertical direction of the container 10 from the outside of the container 10 to partway inside the container 10. In this embodiment, the tube portion 20 is provided in a cylindrical shape. Air A containing dust and the like is drawn from the outside of the container 10 to the inside by the tube portion 20.

[0019] The lower partition portion 30 is provided so as to extend in the up-down direction in a region surrounding the outside of the outer periphery 20b of the cylindrical portion 20 inside the container 10. The lower partition portion 30 is provided so as to be spaced apart from the cylindrical portion 20 in the radial direction of the cylindrical portion 20. In other words, the lower partition portion 30 is provided so as to be spaced apart from the outer periphery 20b of the cylindrical portion 20 in the radial direction and to partially overlap with it.

[0020] In addition, a communication hole 30h is provided in the lower part (lower end 302 side) of the lower partition part 30. For example, a part of the lower end 302 of the lower partition part 30 is connected to the bottom part 11 of the container 10, and the part not connected to the bottom part 11 serves as the communication hole 30h. By providing the communication hole 30h, the liquid L is not blocked by the lower partition part 30 when pouring the liquid L into the container 10 or discharging the liquid L from the container 10. The highest position of the communication hole 30h is set lower than the lower end 202 of the tube part 20. In addition, the communication hole 30h may be a plurality of holes provided in the lower part of the lower partition part 30.

[0021] On the other hand, the upper part (upper end 301 side) of the lower partition part 30 is open. In this embodiment, the lower end 302 of the lower partition part 30 contacts the bottom part 11 and extends upward from the position of the bottom part 11 to halfway up the container 10. Also, in this embodiment, the lower partition part 30 is cylindrical. The lower partition part 30 is provided outside the tubular part 20, which is also cylindrical, and concentric with the tubular part 20. Note that the lower partition part 30 does not necessarily have to be connected to the bottom part 11 of the container 10, and may be supported by the tubular part 20 or the upper partition part 40.

[0022] The upper partition portion 40 is provided inside the container 10, extending in the vertical direction in an area outside the outer periphery 30b of the lower partition portion 30. The upper partition portion 40 is provided spaced apart from the cylindrical portion 20 and the lower partition portion 30 in the radial direction of the cylindrical portion 20. In other words, the upper partition portion 40 is provided so as to be radially spaced apart from the outer periphery 20b of the cylindrical portion 20 and the outer periphery 30b of the lower partition portion 30 while partially overlapping them.

[0023] In addition, the upper part (upper end 401 side) of the upper partition wall 40 is closed. For example, the upper part of the upper partition wall 40 may be closed by a part of the lid part 12 of the container 10, or may be closed by a member other than the lid part 12.

[0024] On the other hand, the lower part (the lower end 402 side) of the upper partition part 40 is open. In this embodiment, the upper end 401 of the upper partition part 40 contacts the lid part 12 and extends downward from the position of the lid part 12 to halfway down the container 10. Also, in this embodiment, the upper partition part 40 is provided in a cylindrical shape. The upper partition part 40 is provided outside the tubular part 20 and the lower partition part 30, which are also provided in a cylindrical shape, and is concentric with the tubular part 20 and the lower partition part 30.

[0025] The ventilation section 50 is provided in communication with an exhaust chamber 10E, which is a space outside the upper partition section 40 inside the container 10. The ventilation section 50 is a passage for discharging air A in the exhaust chamber 10E to the outside of the container 10.

[0026] In the wet dust collector 1A according to this embodiment, the upper partition portion 40 and the lower partition portion 30 are arranged so that they partially overlap each other in the radial direction. In addition, the upper end 301 of the lower partition portion 30 is provided at a position higher than the lower end 202 of the cylindrical portion 20, and the lower end 402 of the upper partition portion 40 is provided at a position higher than the lower end 202 of the cylindrical portion 20 and lower than the upper end 301 of the lower partition portion 30.

[0027] As a result, multiple spaces (hereinafter referred to as scrub spaces) are formed inside the container 10, separated by the tube portion 20, the lower partition portion 30, the upper partition portion 40, and the side wall portion 13 of the container 10. Radially adjacent scrub spaces communicate with each other above or below. The communicating positions of the upper and lower spaces are staggered in the radial direction. Therefore, a flow path formed by multiple scrub spaces is provided extending in the radial direction while reciprocating up and down. In the example shown in FIG. 2, the first space R1 and the second space R2 are examples of scrub spaces.

[0028] FIG. 4 is a schematic cross-sectional view illustrating the operation of the wet dust collecting device according to the first embodiment. When dust collection is performed in the wet dust collector 1A according to this embodiment, first, liquid L is placed in the container 10. For example, water is used as the liquid L. The liquid L is placed in the container 10 until the water surface reaches a position P that is higher than the lower end 402 of the upper partition wall portion 40 on the outermost periphery.

[0029] Next, the pressure in exhaust chamber 10E communicating with ventilation section 50 is made lower than the pressure in tube section 20. For example, a blower (not shown) connected to ventilation section 50 is operated to suck air B from exhaust chamber 10E through ventilation section 50. As a result, the water level, which was the same in each scrub space in container 10, rises in exhaust chamber 10E at the boundary where it is blocked by liquid L, and drops in the relatively blocked inner scrub space.

[0030] Here, the liquid L in the container 10 is connected by a communication hole 30h provided in the lower part of the lower partition portion 30. Therefore, when the water level in the exhaust chamber 10E rises, the drop in the water level in the scrub space inside the exhaust chamber 10E changes depending on the cross-sectional area in the left-right direction of each scrub space (Pascal's principle). In this embodiment, the cross-sectional area in the left-right direction of the tube portion 20 is the smallest, and the outer scrub spaces are larger. Therefore, as the water level in the exhaust chamber 10E rises, the drop in the water level in the tube portion 20 is the largest, and the drop in the water level in the outer scrub spaces is smaller.

[0031] When suction from the ventilation portion 50 is further continued, the water level of the liquid L in the tube portion 20 reaches the lower end 202, and the water level in the scrub space inside the upper partition portion 40 reaches the lower end 402 of the upper partition portion 40. As a result, the air A in the tube portion 20 is drawn into the container 10.

[0032] The air A drawn in from the tube portion 20 contains dust particles and the like. The air A drawn in from the tube portion 20 is drawn into the liquid L from the lower end 202 of the tube portion 20, and a scrubber phenomenon occurs between the air A and the liquid L present between the water surface C and the water surface D, causing agitation, and the dust particles and the like contained in the air A are taken into the liquid L.

[0033] Next, the air A that has risen up from the gap between the tube portion 20 and the lower partition portion 30 is drawn into the gap between the lower partition portion 30 and the upper partition portion 40, and is drawn back into the liquid L at the position of the water surface E where it has reached the lower end 402 of the upper partition portion 40. This causes a scrubber phenomenon between the liquid L present between the water surface E and the water surface F, resulting in agitation. The contact with the liquid L here also results in dust and the like contained in the air A being taken into the liquid L. Then, the air B from which the dust and the like has been removed is discharged to the outside from the exhaust chamber 10E via the ventilation portion 50.

[0034] Thus, in the wet dust collector 1A according to this embodiment, the air A containing dust and the like sucked into the container 10 from the tube portion 20 moves up and down between the tube portion 20 and the lower partition portion 30, and between the lower partition portion 30 and the upper partition portion 40, while moving in the outer circumferential direction while being agitated and in contact with the liquid L (scrubber phenomenon), and is discharged from the ventilation portion 50. Since the air A repeats the scrubber phenomenon with the liquid L while moving up and down, the dust and the like can be effectively taken in by the liquid L, and the air B from which the dust and the like has been removed can be discharged from the ventilation portion 50.

[0035] In this case, the lower end 402 of the upper partition portion 40 is located at a position higher than the lower end 202 of the cylindrical portion 20 and lower than the upper end 301 of the lower partition portion 30, so that the scrubber phenomenon can be efficiently generated at multiple locations of the lower end 402 of the upper partition portion 40 while ensuring a long contact path between the air A and the liquid L.

[0036] In addition, it is preferable to set the relationship between the difference in height between the lower end 202 of the tube portion 20 and the lower end 402 of the upper partition portion 40 and the height of the water surface of the liquid L before operation so that when air B is sucked in from the ventilation portion 50, the timing at which the position of the water surface C in the tube portion 20 reaches the lower end 202 of the tube portion 20 and the timing at which the water surface E reaches the lower end 402 of the upper partition portion 40 are almost (substantially) equal. As a result, air A is drawn into the liquid L from the lower end 202 of the tube portion 20, and the contact and mixing of the air A and the liquid L are performed in a timed manner in the small spaces existing between the water surface C and the water surface D, and between the water surface E and the water surface F. Therefore, the mixing phenomenon (scrubber phenomenon) can be generated simultaneously at multiple locations with minimal pressure loss.

[0037] Also, as shown in FIG. 2, in the wet dust collector 1A according to the present embodiment, when the space in the gap between the cylindrical portion 20 and the lower partition portion 30 is defined as the first space R1, and the space in the gap between the lower partition portion 30 and the upper partition portion 40 is defined as the second space R2, the cross-sectional area S1 of the first space R1 and the cross-sectional area S2 of the second space R2 in the left-right direction may be made different from each other. Thereby, the scrubbing phenomenon caused by the scrubber occurring at a plurality of locations becomes non-uniform, and each can stir the air and the liquid L in a different state, and a wide variety of dusts contained in the air can be captured by the liquid.

[0038] Also, in order to ensure a predetermined flow rate of the air A, when the left-right gap of the first space R1 and the left-right gap of the second space R2 are made the same, the cross-sectional area S2 of the second space R2 that is relatively on the outside becomes larger than the cross-sectional area S1 of the first space R1 that is relatively on the inside. By setting the relationship between the cross-sectional area S1 of the first space R1 and the cross-sectional area S2 of the second space R2 as S1 < S2, it is possible to secure a region through which the air A passes and to increase the decrease in the water level when suction is performed in the space closer to the center.

[0039] Utilizing this principle, by optimizing the cross-sectional area of each space and the position of the lower end 402 of the upper partition portion 40, the scrubber phenomenon can be generated in the intended order or simultaneously at a plurality of locations. For example, in the cross-sectional area S0 of the cylindrical portion 20, the cross-sectional area S1 of the first space R1, and the cross-sectional area S2 of the second space R2, when the relationship is S0 < S1 < S2, the decrease in the water level in the cylindrical portion 20 is the largest, and the decrease in the water level becomes smaller from the first space R1 close to the cylindrical portion 20 to the second space R2 on the outside. By setting the position of the lower end 402 of the upper partition portion 40 according to the difference in the magnitude of this decrease in the water level, the water level reaches the lower end 402 of the upper partition portion 40 at the same time as the water level reaches the lower end 202 of the cylindrical portion 20, and the scrubber phenomenon can be generated simultaneously in each space.

[0040] Conversely, by setting the position of the lower end 402 of the upper partition portion 40, the timing of occurrence of the scrubber phenomenon in each space can be made different. In this way, the mixing ratio of the air A and the liquid L can be optimized by changing the timing of occurrence of the scrubber phenomenon in the first space R1 and the second space R2 and the water level difference between the water surfaces C and D, and E and F. Here, the mixing ratio refers to the ratio between the amount of water present at the occurrence location when the scrubber phenomenon occurs and the amount of air being mixed. The greater the water level difference in the scrubber space, the higher the mixing ratio of water and air, and the more effectively the dust and other particles contained in the air A can be captured.

[0041] Second embodiment FIG. 5 is a schematic cross-sectional view illustrating a wet dust collecting device according to the second embodiment. In the wet dust collector 1B according to the present embodiment, the upper partition wall portion 40 and the lower partition wall portion 30 are each provided in multiple stages. In the wet dust collector 1B, the lower partition wall portion 30, which is the innermost in the radial direction of the cylindrical portion 20, is proximal to the cylindrical portion 20, and the multiple stages of the upper partition wall portion 40 and the multiple stages of the lower partition wall portion 30 are alternately arranged in the radial direction of the cylindrical portion 20. Here, for convenience of explanation, a set of one upper partition wall portion 40 and one lower partition wall portion 30 adjacent thereto on the inside is referred to as an upper / lower partition wall portion 60, and one set of upper / lower partition wall portions 60 is referred to as one stage. In addition, in the multiple stages of the upper / lower partition wall portions 60, the innermost stage is referred to as the first stage, and the nominal number of the stages increases toward the outside.

[0042] In the wet dust collector 1B, in the example shown in Fig. 5, three stages of upper and lower partition wall portions 60 are provided. The number of stages of the upper and lower partition wall portions 60 is not limited to three, and more stages may be provided. In the multi-stage upper and lower partition wall portions 60, the upper partition wall portions 40 and the lower partition wall portions 30 are alternately arranged with gaps in the radial direction. Moreover, the adjacent upper partition wall portions 40 and lower partition wall portions 30 are arranged so that they partially overlap each other in the radial direction.

[0043] In such a multi-stage wet dust collecting apparatus 1B, the lower ends 402 of the upper partition walls 40 in the upper and lower partition walls 60 of the multiple stages are provided at positions that are higher on the radially outer side.

[0044] FIG. 6 is a schematic cross-sectional view illustrating the operation of the wet dust collector according to the second embodiment. When dust collection is performed in the wet dust collector 1B according to this embodiment, first, liquid L is placed in the container 10. For example, water is used as the liquid L. The liquid L is placed in the container 10 until the water level reaches a position P higher than the lower end 202 of the tube portion 20. When the upper and lower partitions 60 are provided in multiple stages, the initial position P of the liquid L only needs to be higher than the lower end 402 of the innermost upper partition 40.

[0045] Next, the pressure in exhaust chamber 10E communicating with ventilation section 50 is made lower than the pressure in tube section 20. For example, a blower (not shown) connected to ventilation section 50 is operated to suck air B from exhaust chamber 10E through ventilation section 50. As a result, the water level, which was the same in each scrub space in container 10, rises in exhaust chamber 10E at the boundary where it is blocked by liquid L, and drops in the relatively blocked inner scrub space.

[0046] When suction from the ventilation portion 50 is further continued, the water level of the liquid L in the tube portion 20 reaches the lower end 202, and the water level in the scrub space inside the upper partition portion 40 reaches the lower end 402 of the upper partition portion 40. As a result, the air A in the tube portion 20 is drawn into the container 10.

[0047] The air A drawn in from the tube portion 20 contains dust particles and the like. The air A drawn in from the tube portion 20 is drawn into the liquid L from the lower end 202 of the tube portion 20, and a scrubber phenomenon occurs between the air A and the liquid L present between the water surface C and the water surface D, causing agitation, and the dust particles and the like contained in the air A are taken into the liquid L.

[0048] Next, the air A that has risen above the water surface D is drawn into the gap between the lower partition 30 and the upper partition 40 in the upper and lower partitions 60 of the first stage, and is drawn again into the liquid L from the water surface E at the lower end 402 of the upper partition 40. Then, a scrubber phenomenon occurs between the liquid L present between the water surface E and the water surface F, and the liquid is stirred.

[0049] Next, the air A that has risen above the water surface F is drawn into the gap between the lower partition 30 and the upper partition 40 in the second stage upper and lower partitions 60, and is drawn again into the liquid L from the water surface G at the lower end 402 of the upper partition 40. Then, a scrubber phenomenon occurs between the water surface G and the liquid L present between the water surface G and the water surface H, causing mixing.

[0050] Next, the air A that has risen above the water surface H is drawn into the gap between the lower partition 30 and the upper partition 40 in the third stage upper and lower partitions 60, and is drawn into the exhaust chamber 10E from the gap between the lower end 402 of the upper partition 40 and the water surface I. Then, the air B from which dust and the like have been removed is discharged from the exhaust chamber 10E to the outside via the ventilation section 50.

[0051] In the wet dust collector 1B, the more stages the upper and lower partitions 60 have, the more times the air A and the liquid L are stirred when they come into contact with each other, thereby improving the dust collection effect due to the scrubbing action of the air A and the liquid L. In addition, by forming the upper and lower partitions 60 in a multi-stage configuration, the dust collection effect can be improved while minimizing the increase in size of the device.

[0052] In addition, in the wet dust collector 1B, the lower ends 402 of the upper partition sections 40 in the multi-stage upper and lower partition sections 60 are provided at positions that are higher radially outward, and by changing this position, the timing at which the scrubber action is generated and the mixing ratio of the air A and the liquid L can be controlled.

[0053] Here, in the wet dust collector 1B, the height of each upper end 301 of the lower partition wall 30 in the multi-stage upper and lower partition wall 60 may be made constant. This makes the height of the upper end 301 of the multi-stage lower partition wall 30 uniform, making it easier to set the path length of contact between air and liquid and the internal pressure depending on the height of the multi-stage upper partition wall 40. Also, in the path where the scrubber effect is not occurring, the function of liquid spraying is effectively added.

[0054] (Modification) Next, a modification of the wet dust collector according to the present embodiment will be described. FIG. 7 is a schematic diagram illustrating a modified example (first example) of the wet dust collector according to the present embodiment. In the wet dust collector 1C shown in Fig. 7, the cylinders of the cylinder portion 20, the upper partition wall portion 40, and the lower partition wall portion 30 have a rectangular shape. At least one of the cylinder portion 20, the upper partition wall portion 40, and the lower partition wall portion 30 may have a shape other than a cylinder. That is, it may have a polygonal prism shape other than a rectangle. In the polygonal prism shape, turbulence is more likely to occur in the liquid L when the air A and the liquid L are mixed, compared to the cylindrical shape, and the mixing efficiency is improved.

[0055] FIG. 8 is a schematic perspective view illustrating a modified example (part 2) of the wet dust collector according to the present embodiment. In the wet dust collector 1D shown in Fig. 8, a turbulent flow generating section 80 for disturbing the flow of the liquid L is provided at the lower end 302 of the upper partition 40. As an example of the turbulent flow generating section 80, in the example shown in Fig. 9, the lower end 302 is formed in a zigzag shape. This can enhance the agitation effect between the air containing dust and the liquid when they come into contact with each other.

[0056] The turbulent flow generating part 80 may be provided at the lower end 202 of the tube part 20. The turbulent flow generating part 80 may be a zigzag shape provided at the lower ends 202 and 302, or may be a net or protrusion provided in the middle of the flow path, as long as it generates flow resistance. The turbulent flow generating part 80 may be a large number of minute holes provided at the lower part of the tube part 20 or the lower part of the upper partition part 40. The minute holes may have the same diameter or may have random diameters. By providing a large number of minute holes, turbulence is generated when part of the air A or liquid L passes through the minute holes, thereby enhancing the stirring effect.

[0057] (Examples) Next, a dust collection system to which the wet dust collector according to this embodiment is applied will be described. FIG. 9 is a schematic diagram illustrating a dust collection system. Dust collection system 100 includes wet dust collector 1B according to this embodiment in housing 110. Although wet dust collector 1B is used in dust collection system 100 shown in Fig. 9, wet dust collectors 1A, 1C, and 1D may also be used.

[0058] The housing 110 is provided with a blower 120 for sucking air A from the exhaust chamber 10E of the container 10 through the ventilation section 50. A drain 130 for discharging liquid L from the container 10 is provided at the bottom of the container 10. To facilitate separation of the liquid L and the air B when air B is sucked through the ventilation section 50, a separation plate 55 may be provided in the exhaust chamber 10E.

[0059] In the wet dust collector 1B according to the present embodiment, the lower partition wall portion 30 and the upper partition wall portion 40 are provided concentrically with the tube portion 20, so that the air A drawn in from the tube portion 20 can be brought into contact with the liquid L while being reciprocated in the vertical direction by the lower partition wall portion 30 and the upper partition wall portion 40. That is, when the lower partition wall portion 30 and the upper partition wall portion 40 are configured in a multi-stage configuration, the contact path between the air A and the liquid L extends in the vertical direction, and only expands in the radial direction by the number of stages, but the height does not change. This makes it possible to lengthen the contact path between the air A and the liquid L while suppressing the increase in the size of the device configuration. In addition, since an increase in suction resistance can be suppressed even with a multi-stage configuration, the load on the blower 120 can be suppressed, which also contributes to the miniaturization of the blower 120.

[0060] As described above, according to the wet dust collecting devices 1A, 1B, 1C and 1D of the present embodiment, the device configuration can be made compact and efficient dust collection can be performed.

[0061] Although the present embodiment and its specific examples have been described above, the present invention is not limited to these examples. For example, the example in which the tube part 20, the lower partition part 30, and the upper partition part 40 are provided concentrically with each other has been shown, but they do not necessarily have to be concentric, and some of the central positions may be shifted or eccentric in one direction. In addition, in the present embodiment, the air A in the container 10 is sucked from the ventilation part 50, but the air A may be sent from the tube part 20. In addition, those in which a person skilled in the art appropriately adds, deletes, or modifies the design of the above-mentioned embodiments or their specific examples, or those in which the features of each embodiment are appropriately combined, are also included in the scope of the present invention as long as they include the gist of the present invention. [Industrial Applicability]

[0062] The wet dust collectors 1A, 1B, 1C and 1D according to the present embodiment can be applied to various processing devices and processing devices such as laser processing devices, and can also be suitably used as air purifiers. [Explanation of symbols]

[0063] 1A,1B,1C,1D…Wet type dust collector 10…Container 10E…Exhaust chamber 11...Bottom 12...Lid part 13...Side wall 20...Cylinder part 20b…Outer circumference 30…Lower bulkhead part 30b…Outer circumference 30h…Communication hole 40...Upper bulkhead part 50…Ventilation section 55...Separation plate 60...Upper and lower partition wall 80...Turbulence generation part 100…Dust collection system 110…Housing 120…Blower 130…Drain 202…lower end 301...Top end 302…lower end 401...Top end 402…lower end A, B…Air C,D,E,F,G,H,I…Water surface L…Liquid P…Position R1: First space R2…Second space S0,S1,S2…Cross-sectional area

Claims

1. A container for containing a liquid; A cylindrical portion extending in the vertical direction of the container and extending from the outside to the middle of the inside of the container; a multi-stage lower partition portion extending in the up-down direction in a region surrounding the outside of the outer periphery of the cylindrical portion inside the container, being spaced apart from the cylindrical portion in the radial direction of the cylindrical portion, having a communication hole at the lower portion and an open upper portion; a multi-stage upper partition portion extending in the vertical direction in a region surrounding the outer periphery of each of the multi-stage lower partition portions inside the container, spaced apart from the cylindrical portion and each of the multi-stage lower partition portions in the radial direction, and having a closed upper portion and an open lower portion; a vent portion communicating with a space outside the multi-stage upper partition portion inside the container; Equipped with the lower partition wall portion that is the innermost in the radial direction is proximal to the cylindrical portion, and the upper partition wall portions and the lower partition wall portions are alternately arranged in the radial direction; the multi-stage upper partition wall portion and the multi-stage lower partition wall portion are disposed so as to partially overlap each other in the radial direction, an upper end of each of the multiple-stage lower partition walls is provided at a position higher than a lower end of the cylindrical portion, A wet dust collecting device, wherein the lower ends of each of the multi-stage upper partition portions are higher than the lower end of the cylindrical portion and lower than the upper ends of each of the multi-stage lower partition portions, and the positions are higher toward the outside in the radial direction.

2. 2. The wet dust collecting apparatus according to claim 1, wherein the height of each upper end of the multi-stage lower partition portion is constant.

3. 2. The wet dust collector according to claim 1, further comprising a turbulence generating section for turbulently flowing the liquid, the turbulence generating section being provided at a lower end of the cylindrical section and / or at a lower end of each of the upper partition sections in the multiple stages.

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