Water-type dust collector

Abstract

To provide a water reservation type dust collector with high dust collection efficiency.SOLUTION: A water reservation type dust collector 1 comprises: a housing 11 configured to store liquid on a lower side thereof; a gas inlet 12 which is provided on the housing 11 and serves as an inflow hole of a gas into the housing 11; a gas outlet 13 which is provided on the housing 11 and serves as an outflow hole of the gas from the housing 11; and a mixed channel 40 which is provided between the gas inlet 12 and the gas outlet 13 in the housing 11, and is configured so that, the gas and the liquid pass therethrough while being mixed. The mixed channel 40 has, a first chamber 41, a second chamber 42, a third chamber 43 arranged sequentially from a lower side to an upper side, from an upstream side to a downstream side of the channel. A first inflow hole 61 being an inlet of the first chamber 41, a second inflow hole 62 being an inlet of the second chamber 42 and an outlet of the first chamber 41, a third outflow hole 63 being an outlet of the second chamber 42 and an inlet of the third chamber 43, and an outlet of the third chamber 43, are alternately arranged on opposite sides in a horizontal direction, respectively.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a water-collecting type dust collecting device. [Background technology]

[0002] In general, in industries and the like, it is required in various situations to separate and collect particles dispersed in a gas. There are various methods for collecting dust, including those using filters. Among dust collectors, bag filters and electric dust collectors are known as dust collectors with good dust collection efficiency. With such dry dust collectors, there is a risk of dust explosions and fires caused by combustible dust. In addition, packed scrubbers are known as gas absorption devices. With packed scrubbers, if there is dust in the gas, the dust may clog the internal packing, causing a decrease in air volume and resulting in a decrease in performance. In order to eliminate such problems, daily maintenance is essential, and cleaning and other procedures require a great deal of cost and time.

[0003] There is known a water-storage dust collector, also called a wet scrubber, which mixes the gas to be treated with a liquid such as water and causes the liquid to capture dust particles and absorb specific gases without using a filter. For example, Patent Document 1 discloses a technology relating to a particle recovery device that uses a wet scrubber to separate and recover from the gas a particle group consisting of fine particles contained in the gas, intermediate particles having a larger mass than the fine particles, and coarse particles having a larger mass than the intermediate particles. The water-storage dust collector has a simple structure without using a filter, and thus has excellent features such as low maintenance burden. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-000997 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a water-collecting type dust collector having high dust-collection efficiency. [Means for solving the problem]

[0006] According to one aspect of the present invention, a water-storage type dust collector comprises a housing configured to store liquid at the bottom, a gas inlet provided in the housing which is an inlet for gas into the housing, a gas outlet provided in the housing which is an outlet for gas from within the housing, and a mixing flow path provided inside the housing between the gas inlet and the gas outlet and configured so that the gas and the liquid pass through while being mixed, and the mixing flow path has a first chamber, a second chamber, and a third chamber arranged in this order from bottom to top from the upstream of the flow path to the downstream of the flow path, and a first inlet which is an inlet of the first chamber, a second inlet which is an outlet of the first chamber and an inlet of the second chamber, a third inlet which is an outlet of the second chamber and an inlet of the third chamber, and an outlet of the third chamber are arranged alternately on opposite horizontal sides. Effect of the Invention

[0007] According to the present invention, a water-type dust collector having high dust-collection efficiency can be provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an outline of an example of the external appearance of a water-type dust collector according to a first embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the water-type dust collector taken along line II-II shown in FIG. [Diagram 3] FIG. 3 is a schematic diagram showing a state in which water is stored in the housing of the pooled-water type dust collector, and the dust-containing gas to be treated is supplied into the housing from the gas inlet to operate the pooled-water type dust collector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment will be described with reference to the drawings. The water-storage type dust collector of this embodiment is a wet dust collection and gas absorption device for removing fine particles such as dust and specific gases contained in a gas to be treated. In the water-storage type dust collector of this embodiment, for example, a dust-containing gas to be treated is mixed with a liquid, and the dust is collected by the liquid. In addition, a specific gas contained in the dust-containing gas that is easily absorbed by the liquid is absorbed by the liquid. This water-storage type dust collector is used for, but is not limited to, collecting hygroscopic dust, high-temperature exhaust gas dust, flammable or explosive dust, absorbing toxic gases, removing malodorous gases, and the like.

[0010] <Configuration of the water collecting device> FIG. 1 is a diagram showing the outline of the exterior of the pooled-water type dust collector 1 according to this embodiment. In FIG. 1, (a) is a front view, and (b) is a right side view. As shown in this figure, the pooled-water type dust collector 1 has a housing 11 having a vertically long, approximately rectangular parallelepiped shape. The housing 11 is formed of plate material, and the inside is basically hollow, in which plate material is arranged to form a flow path, as described later. In FIG. 1, the housing 11 is drawn to have a flat shape with a short depth, but the depth of the housing 11 changes according to the amount of gas processed per unit time, and the depth increases as the processing amount increases. The overall dimensions are also changed according to the amount of gas processed. The amount of gas processed is, for example, several m 3 / min~several thousand m 3 / min, and accordingly, the width, depth, and height of the housing 11 are adjusted within a range of, for example, several hundred mm to several thousand mm. The water-collecting dust collector 1 can be a stationary type or a movable type placed on a cart.

[0011] A gas inlet 12 for allowing the gas to be treated to flow into the housing 11 is provided on the right side of the housing 11, and a gas outlet 13 for allowing the treated gas to flow out of the housing 11 is provided on the left side of the housing 11. A water supply port 15 for supplying liquid such as water for treatment into the housing 11 is provided on the right side of the housing 11. The arrangement of the gas inlet 12, gas outlet 13, and water supply port 15 shown here is one example, and their arrangement may be appropriately changed as long as the configuration described below is realized. A drain port 16 is provided at the bottom of the housing 11. An overflow pipe 17 and a seal pot 18 are provided on the left side of the housing 11. The lower side of the housing 11 is configured to store liquid such as water.

[0012] Fig. 2 is a vertical cross-sectional view of the water-collecting dust collector 1 taken along line II-II in Fig. 1(b). Seven plates, namely, a first plate 21, a second plate 22, a third plate 23, a fourth plate 24, a fifth plate 25, a sixth plate 26, and a seventh plate 27, are arranged in the space inside the housing 11. These plates are connected to the inner surfaces of the front side and the rear side of the housing 11 by an appropriate method such as welding, and extend in the depth direction from the front side to the rear side. These plates form a flow path between the inner surfaces of the front side and the rear side.

[0013] The internal structure of the pooled-water type dust collector 1 will be described with reference to Fig. 2. The up-down direction in Fig. 2 is the vertical direction when the pooled-water type dust collector 1 is installed, and in the following description, the pooled-water type dust collector 1 will be referred to as an upper side 103 and a lower side 104, as shown by the arrows in the lower left of Fig. 2, based on the orientation when installed. The left-right direction in Fig. 2 is the horizontal direction when the pooled-water type dust collector 1 is installed, and in the following description, the right side of Fig. 2 where the gas inlet 12 is located will be referred to as a first side 101, as shown by the arrows in the lower left of Fig. 2, and the left side of Fig. 2 where the gas outlet 13 is located will be referred to as a second side 102, as shown by the arrows in the lower left of Fig. 2.

[0014] As shown in FIG. 2, the first plate 21 is disposed so as to face the gas inlet 12, to be spaced apart from the wall surface on the first side of the housing 11 on which the gas inlet 12 is provided, and to extend in the vertical direction. The upper side of the first plate 21 is blocked by the sixth plate 26. The first plate 21 functions as an inflow guide plate that guides the gas to be treated that has flowed in from the gas inlet 12 downward. In this manner, the housing 11 and the first plate 21 form an inlet chamber 46 that serves as a flow path extending downward from the gas inlet 12. The lower side of the first plate 21 is bent and extends to the second side. The gas to be treated that has flowed in flows to the second side along the lower end of the first plate 21 that extends to the second side.

[0015] The second plate 22 is disposed on the second side of the first plate 21, facing the first plate 21 with a gap therebetween, and extending in the vertical direction. The upper end of the second plate 22 is located lower than the upper end of the first plate 21, i.e., the sixth plate 26, and the lower end of the second plate 22 is located lower than the lower end of the first plate 21. Therefore, the second plate 22 faces the edge of the lower end of the first plate 21 that is bent toward the second side. The second plate 22 functions as a partition plate that divides the housing 11 into left and right sides.

[0016] As will be described in detail later, during use, liquid such as water is stored under the housing 11. On the first side of the second plate 22, which is a partition plate, the water surface of this liquid is located between the lower end of the second plate 22 and the lower end of the first plate 21, so that a flow path through which the gas to be treated flows from the lower side to the upper side is formed between the opposing first plate 21 and second plate 22. Here, in the flow path between the first plate 21 and the second plate 22, the gas to be treated and the liquid pass through while being mixed together. In this way, the flow path between the first plate 21 and the second plate 22 functions as a mixing flow path 40.

[0017] The third plate 23, the fourth plate 24, and the fifth plate 25 are provided in the flow path between the first plate 21 and the second plate 22. The third plate 23 extends from the second plate 22 to the first side at a position approximately one-third from the bottom of the second plate 22, and is disposed at an incline so that the first side is slightly lower than the second side. A gap is formed between the first side of the third plate 23 and the first plate 21. The fourth plate 24 extends from the first plate 21 to the second side at a position approximately in the middle between the top and bottom of the first plate 21 above the third plate 23, and is disposed at an incline so that the second side is slightly lower than the first side. A gap is formed between the second side of the fourth plate 24 and the second plate 22. The fifth plate 25 extends from the second plate 22 to the first side at a position above the second plate 22 above the fourth plate 24, and is disposed at an incline so that the first side is slightly lower than the second side. A gap is formed between the first side of the fifth plate 25 and the first plate 21 .

[0018] As described above, the mixing flow channel 40 is divided into four chambers by the third plate 23, the fourth plate 24, and the fifth plate 25. These four chambers are referred to as the first chamber 41, the second chamber 42, the third chamber 43, and the fourth chamber 44, from upstream to downstream, i.e., from bottom to top. That is, the first chamber 41 and the second chamber 42 are separated by the third plate 23, the second chamber 42 and the third chamber 43 are separated by the fourth plate 24, and the third chamber 43 and the fourth chamber 44 are separated by the fifth plate 25.

[0019] Here, the inlet of the first chamber 41 is a gap formed between the end of the first plate 21 and the second plate 22, and will be referred to as a first inlet 61. The outlet of the first chamber 41, and the inlet of the second chamber 42, is a gap between the first side end of the third plate 23 and the first plate 21, and will be referred to as a second inlet 62. The outlet of the second chamber 42, and the inlet of the third chamber 43, is a gap between the second side end of the fourth plate 24 and the second plate 22, and will be referred to as a third inlet 63. The outlet of the third chamber 43, and the inlet of the fourth chamber 44, is a gap between the first side end of the fifth plate 25 and the first plate 21, and will be referred to as a fourth inlet 64. From the bottom, the first inlet 61, the second inlet 62, the third inlet 63, and the fourth inlet 64 are provided alternately on the first side and the second side, i.e., alternately on opposite horizontal sides of the mixing channel 40.

[0020] The sixth plate 26 described above extends from the wall on the first side of the housing 11 to the second side so as to cover the first plate 21 and the second plate 22. As described above, the upper end of the first plate 21 is connected to the sixth plate 26, so that the first side of the first plate 21 is an inlet chamber 46 through which the gas to be treated flows downward from the gas inlet 12. The sixth plate 26 between the first plate 21 and the second plate 22 is a wall that defines the upper side of the fourth chamber 44. The sixth plate 26 on the second side of the second plate 22 is bent and extends downward so as to cover the second plate 22. In this way, a fifth chamber 45 is formed on the second side of the second plate 22, the upper side and the second side of which are defined by the sixth plate 26. The outlet of the fourth chamber 44 and the inlet of the fifth chamber 45 is the gap between the upper end of the second plate 22 and the sixth plate 26, which will be referred to as a fifth inlet 65. The lower side of the fifth chamber 45 is open.

[0021] During use, liquid such as water is accumulated under the housing 11, and the gas flowing in from the gas inlet 12 flows from the inlet chamber 46 into the first chamber 41 through the first inlet 61 while stirring up the liquid, and they are vigorously agitated in the first chamber 41, the second chamber 42, and the third chamber 43. The gas and liquid then flow into the fifth chamber 45 through the fourth chamber 44, the liquid falls from the fifth chamber 45, and the gas is separated. The portion formed by the first to sixth plates, centered around the first chamber 41, the second chamber 42, and the third chamber 43, functions as a scrubbing section 10 in which the gas to be treated flowing in from the gas inlet 12 and the liquid such as water accumulated under the housing 11 are mixed, as described later.

[0022] The shape of the scrubbing section 10 as described above may be changed as appropriate as long as it is roughly the shape described above. For example, a part of it may bulge outward or bend inward. Therefore, each plate may be curved or bent at an appropriate position. The first plate 21 and the second plate 22 extend vertically, but may be slightly inclined rather than vertical.

[0023] At a position above the scrubbing section 10 and below the gas outlet 13, a seventh plate 27 is disposed as a drain plate so that the liquid in the housing 11 is not discharged from the gas outlet 13. The seventh plate 27 extends from the wall on the second side of the housing 11 to the first side. The seventh plate 27 is provided at a slight incline so that the first side is lowered. In addition, the end of the first side of the seventh plate 27 is bent downward. In this way, the liquid on the lower surface of the seventh plate 27 falls downward. The treated gas that has passed through the scrubbing section 10 passes through the drain chamber 47 below the seventh plate 27, passes through the outlet chamber 48 above the seventh plate 27, and is discharged to the outside of the pooled water type dust collector 1 via the gas outlet 13.

[0024] The pooled-water dust collector 1 also includes an overflow pipe 17 on the side of the housing 11, which is in communication with the inside of the housing 11. The overflow pipe 17 extends vertically. A seal pot 18 is provided on the lower side of the overflow pipe 17. An overflow port 17a is formed on the upper side of the overflow pipe 17. When the liquid level in the housing 11 becomes higher than the overflow port 17a, the liquid is discharged from the overflow port 17a through the seal pot 18 to the outside of the housing 11. The overflow pipe 17 may be provided inside the housing 11 and extend from the lower side of the housing 11 to the outside of the housing 11.

[0025] Examples of materials that can be used for the members constituting the water-collecting device 1 include stainless steel such as SUS304 and SUS316L, and fiber reinforced plastics (FRP).

[0026] <Function of the water-collecting dust collector> The function of the pooled-water type dust collector 1 will be described with reference to Fig. 3. Fig. 3 is a schematic diagram showing the state of water when liquid water is stored in the housing 11 of the pooled-water type dust collector 1 and the dust-containing gas to be treated is supplied from the gas inlet 12 into the housing 11 to operate the pooled-water type dust collector 1. In Fig. 3, horizontal hatching indicates water that has accumulated at the bottom. The dashed arrows indicate the flow of gas, and the solid arrows indicate the flow of gas that flows together with the blown-up granular liquid.

[0027] A pipe for supplying the dust-containing gas to be treated is connected to the gas inlet 12 so that the dust-containing gas to be treated flows into the water-storage type dust collector 1, and a pipe for recovering the treated gas after dust collection flowing out from the water-storage type dust collector 1 is connected to the gas outlet 13. With the drain outlet 16 closed, water is supplied into the housing 11 from the water supply port 15. Water is supplied into the housing 11 so that the water level when the water-storage type dust collector 1 is not operating is, for example, at the middle height of the first chamber 41. Water may be supplied continuously. In the case of continuous water supply, excess water is constantly drained from the overflow pipe 17. A ball tap for automatic water intake may be provided to the water supply port 15 so that water is only drawn in when the water level decreases.

[0028] During operation, a pressure difference is applied so that the gas inlet 12 side is the high pressure side and the gas outlet 13 side is the low pressure side so that gas flows from the gas inlet 12 side to the gas outlet 13 side. Gas may be pushed in from the gas inlet 12 side or sucked in from the gas outlet 13 side using a fan or blower or the like.

[0029] At this time, the gas flows into the housing 11 from the gas inlet 12, passes through the inlet chamber 46, the first chamber 41, the second chamber 42, the third chamber 43, the fourth chamber 44, and the fifth chamber 45, and flows out of the housing 11 from the gas outlet 13 via the drain chamber 47 and the outlet chamber 48. Due to the pressure difference between the inlet chamber 46 and the drain chamber 47, the water level of the water stored in the housing 11 decreases on the inlet chamber 46 side and increases on the drain chamber 47 side, as shown in FIG. 3. The height of the reference water level 96 on the drain chamber 47 side is the height of the overflow port 17a. The position of the inlet chamber water level 98 on the inlet chamber 46 side is slightly lower than the lower end of the first plate 21, and is approximately the height of the first inlet 61.

[0030] The dust-containing gas flowing in from the gas inlet 12 flows downward through the inlet chamber 46. The coarse dust particles flowing in from the gas inlet 12 are struck by the water below the inlet chamber 46 and collected by the water. The dust-containing gas flowing downward through the inlet chamber 46 flows at high speed from the first side to the second side (from right to left in FIG. 3; in the following description with reference to FIG. 3, the first side and the second side will be described as the right and the left, respectively) along the lower edge of the first plate 21. The gas flows upward while colliding with the second plate 22 and flows into the first chamber 41. At this time, the water on the inlet chamber water surface 98 is blown up. The blown up water and the gas are mixed. By mixing the water and the gas, the dust particles contained in the gas are collected by the water. The mixed fluid of the water and the gas flows as follows.

[0031] That is, the fluid that flows upward in the first chamber 41 along the second plate 22 collides with the third plate 23 and changes direction to the lower right. In this way, the third plate 23 functions as a first reversing blade that changes the direction of the fluid. The fluid that leaves the second plate 22 also changes direction to the lower right by the fluid that bounces downward on the third plate 23 and by gravity. After that, the fluid flows downward and then to the left along the first plate 21. That is, a first clockwise vortex 91 is formed in the first chamber 41. The water and gas are vigorously mixed by being stirred by the first vortex 91, and the dust contained in the gas is efficiently collected by the water. Since the third plate 23 is inclined to the lower right, the flow as described above occurs, and the first vortex 91 is efficiently formed in the first chamber 41.

[0032] A part of the fluid flowing to the right along the third plate 23 blows upward through the second inlet 62 and flows into the second chamber 42. The fluid flowing into the second chamber 42 flows upward along the first plate 21 in the second chamber 42, collides with the fourth plate 24, and changes direction to the lower left. In this way, the fourth plate 24 functions as a second reversing blade that changes the direction of the fluid. The fluid that leaves the first plate 21 also changes direction to the lower left by the fluid that bounces downward at the fourth plate 24 and by gravity. After that, the fluid flows downward along the second plate 22 and to the right along the third plate 23. That is, a second counterclockwise vortex 92 is formed in the second chamber 42.

[0033] The first rotation direction of the above-mentioned first vortex 91 and the second rotation direction of this second vortex 92 are opposite directions. By reversing the rotation directions, the water and gas are mixed more vigorously. The stirring of the second vortex 92 also vigorously mixes the water and gas, and the dust is further captured by the water. Here again, the fourth plate 24 is tilted downward and leftward, so that the second vortex 92 is generated efficiently.

[0034] A part of the fluid flowing leftward along the fourth plate 24 blows upward through the third inlet 63 and flows into the third chamber 43. The fluid flowing into the third chamber 43 flows upward along the second plate 22 in the third chamber 43, collides with the fifth plate 25, and changes direction to the lower right. In this way, the fifth plate 25 functions as a third reversing blade that changes the direction of the fluid. The fluid that leaves the second plate 22 also changes direction to the lower right by the fluid that bounces downward on the fifth plate 25 and by gravity. After that, the fluid flows downward along the first plate 21 and leftward along the fourth plate 24. That is, a third clockwise vortex 93 is formed in the third chamber 43.

[0035] The second rotation direction of the second vortex 92 and the third rotation direction of the third vortex 93 are opposite to each other. By reversing the rotation directions, the water and the gas are mixed more vigorously. The stirring of the third vortex 93 also vigorously mixes the water and the gas, and the dust is further captured by the water. Here again, the fifth plate 25 is tilted downward and to the right, so that the third vortex 93 is generated efficiently.

[0036] As it rises through the first chamber 41, the second chamber 42, and the third chamber 43, it reverses course many times, turning into a first vortex 91, a second vortex 92, and a third vortex 93, and the liquid and the gas containing the dust are in contact with each other for a long time, so that even the smallest dust particles become soluble in the liquid and are collected by the liquid, and any gas that can be absorbed by the liquid is absorbed by the liquid.

[0037] A part of the fluid flowing to the right along the fifth plate 25 blows upward through the fourth inlet 64 and flows into the fourth chamber 44. The fluid that flows into the fourth chamber 44 flows along the sixth plate 26 and flows into the fifth chamber 45 through the fifth inlet 65. The fluid continues to flow along the sixth plate 26 and flows downward by gravity. Then, it flows into the drain chamber 47 outside the scrubbing section 10. As a result, the water contained in the fluid falls to the reference water level 96 of the drain chamber 47. In this way, the sixth plate 26, particularly the second side, functions as a blowing plate that slams the rising fluid against the water surface below and blows dust and gas into the water.

[0038] The gas contained in the fluid blown downward from the fifth chamber 45 flows from the drain chamber 47 to the outlet chamber 48. Dust contained in the fluid when it flowed into the housing 11 from the gas inlet 12 is collected by the water, and purified gas containing no dust flows to the outlet chamber 48. Most of the water is dropped downward by the sixth plate 26 acting as a blowing plate, and any water contained in the drain chamber 47 is also dropped downward by the seventh plate 27 acting as a drain plate, so that the gas reaching the outlet chamber 48 does not contain water. The gas purified in this way flows out from the gas outlet 13.

[0039] The dust collected in the water is discharged from the overflow port 17a, and the settled dust is later discharged from the drain port 16.

[0040] The height of the mixing flow passage 40 from the lower part of the first chamber 41 to the fourth chamber 44 is preferably 4 to 8 times the distance between the first plate 21 and the second plate 22. If the distance between the first plate 21 and the second plate 22 is narrow and the mixing flow passage 40 is too thin, vortices such as the first vortex 91, the second vortex 92, and the third vortex 93 cannot be formed. In this case, water flows through the narrow flow passage, and the water alternates between blowing upward and falling downward, and efficient mixing of the water and gas is not realized, and the dust collection efficiency is reduced. In addition, if the distance between the first plate 21 and the second plate 22 is wide and the mixing flow passage 40 is too wide, the water does not blow up sufficiently, and efficient mixing of the water and gas is not realized, and the dust collection efficiency is reduced.

[0041] Moreover, as in this embodiment, the first plate 21 and the second plate 22 are arranged in parallel, and it is preferable that the horizontal cross-sectional areas of the central parts of the first chamber 41, the second chamber 42, and the third chamber 43 are equal. For example, if the upper part of the mixing flow channel 40 is narrower, the pressure loss increases, the flow rate decreases, the amount of water stirred up decreases, and the dust collection efficiency decreases.

[0042] In the water collecting device 1 of this embodiment, the first chamber 41, the second chamber 42, and the third chamber 43, which perform functions such as dust collection, are arranged vertically. Therefore, the width of the water collecting device 1 as a whole is relatively narrow, and space saving is realized while maintaining high dust collecting performance.

[0043] According to the water-collection type dust collector 1, the gas and water are vigorously mixed in the first vortex 91, the second vortex 92, the third vortex 93 and other places, so that the dust is efficiently collected in the water and the gas is treated extremely efficiently despite the relatively low pressure loss. High dust collection performance has also been confirmed in experiments.

[0044] Here, it has been described that water is used to collect dust, but various liquids, such as water to which other liquids have been added, can also be used. Gases can be absorbed by liquids, not limited to solids such as dust. For example, by adjusting the pH of the liquid, it is possible to neutralize and absorb specific toxic gases, or to absorb malodorous gases. Therefore, the water-storage type dust collector 1 can be used in factories and the like when gas absorption and deodorization are performed in addition to dust collection. The water-storage type dust collector 1 can be used in various situations to improve the environment inside and outside factories. In addition, high economic benefits can be obtained in the recovery of precious metal powder, etc.

[0045] In the pooled-water type dust collector 1 of this embodiment, the scrubbing section 10 is formed with a small number of parts, such as the first plate 21, the second plate 22, the third plate 23, the fourth plate 24, the fifth plate 25, and the sixth plate 26, and is easy to manufacture. Nevertheless, in the scrubbing section 10, the above-mentioned complex flow is formed, and the water and gas are mixed efficiently, and high dust collection performance is exhibited. In the pooled-water type dust collector 1, the inflowing gas blows up the water in the housing 11, so there is no need to provide a separate pump or the like in the pooled-water type dust collector 1. Since the configuration of the pooled-water type dust collector 1 is simple, the manufacturing cost of the pooled-water type dust collector 1 is low.

[0046] In addition, the water-collecting dust collector 1 is easy to maintain and the maintenance costs are low because it does not use filters or demisters. For example, there is no risk of a decrease in the suction air volume due to clogging of the filter, which can occur when using a dust collector with a filter, and the associated deterioration of the environment in the factory.

[0047] In addition, the water-collecting dust collector 1 uses water to collect dust, so there is no risk of explosion or fire. For example, there is no risk of fire even when processing gas containing sparks that are generated during cutting, grinding, or welding work. There is also no risk of dust explosions caused by static electricity. Even if the gas contains substances that have vaporized at high temperatures, the solidified substances can be collected while being cooled with water.

[0048] Although the present invention has been described above by showing preferred embodiments, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention.

[0049] For example, two scrubbing sections 10 having the same configuration as the scrubbing section 10 of the above embodiment may be arranged in a horizontal direction. In this way, the gas to be treated passes through two scrubbing sections 10, thereby further improving the dust collection efficiency. [Explanation of symbols]

[0050] 1 Water-type dust collector 10 Scrubbing Section 11. Cabinet 12 Gas inlet 13 Gas outlet 15 Water inlet 16 Drain 17 Overflow pipe 17a Overflow port 18 Seal Pot 21 1st board 22 2nd board 23 3rd board 24 4th board 25 5th board 26 6th board 27 Board 7 40 Mixing channel 41 Room 1 42 Room 2 43 Room 3 44 Room 4 45 Room 5 46 Entrance room 47 Draining Room 48 Exit chamber 61 1st inlet 62 2nd inlet 63 Third inlet 64 4th inlet 65 5th inlet 91 The First Vortex 92 The Second Vortex 93 The Third Vortex 96 Reference water level 98 Entrance room water surface 101 First Side 102 Second Side 103 Upper 104 Lower side

Claims

1. A housing configured to store liquid underneath; a gas inlet provided in the housing for allowing gas to flow into the housing; a gas outlet provided in the housing for allowing gas to flow out from inside the housing; a mixing flow path provided between the gas inlet and the gas outlet inside the housing, the mixing flow path being configured so that the gas and the liquid pass through the mixing flow path; a separation channel provided between the mixing channel and the gas outlet for separating the gas and the liquid; Equipped with the mixing flow channel has a first chamber, a second chamber, and a third chamber arranged in this order from bottom to top from the upstream to the downstream of the flow channel, a first inlet which is an inlet of the first chamber, a second inlet which is an outlet of the first chamber and an inlet of the second chamber, a third inlet which is an outlet of the second chamber and an inlet of the third chamber, and an outlet of the third chamber are alternately provided on opposite sides in a horizontal direction, The separation flow path is configured to guide the gas and the liquid that have risen in the mixing flow path in a horizontal direction and a downward direction downstream of the outlet of the third chamber, so that the liquid falls downward to be separated from the gas, and the separated gas is directed toward the gas outlet. Reservoir type dust collector.

2. 2. The water-collecting device according to claim 1, wherein a horizontal cross-sectional area of ​​the central portion of the first chamber, a horizontal cross-sectional area of ​​the central portion of the second chamber, and a horizontal cross-sectional area of ​​the central portion of the third chamber are equal to each other.

3. The first chamber, the second chamber, and the third chamber are formed between a first plate and a second plate extending in a vertical direction opposite to each other, The boundary between the first chamber and the second chamber is defined by a first reversing blade extending downward from the second plate to just before the first plate, The boundary between the second chamber and the third chamber is defined by a second reversing blade extending downward from the first plate to just before the second plate, The upper boundary of the third chamber is defined by a third reversing vane extending downward from the second plate to just short of the first plate.

3. The water-collecting device according to claim 1 or 2.

4. 4. The water-collection type dust collector according to claim 3, wherein the height of the mixing passage is 4 to 8 times the distance between the first plate and the second plate.

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