WO2017159102A1

WO2017159102A1 - Exhaust gas processing device

Info

Publication number: WO2017159102A1
Application number: PCT/JP2017/003873
Authority: WO
Inventors: 邦幸高橋; 譲榎本
Original assignee: 富士電機株式会社
Priority date: 2016-03-16
Filing date: 2017-02-02
Publication date: 2017-09-21
Also published as: JP2019076799A

Abstract

When a nozzle provided in a location identical in height to an exhaust gas intake port discharges a fluid toward the exhaust gas intake port, sometimes the fluid discharged from the nozzle flows back toward the engine from the exhaust gas intake port. There is a possibility of engine failure when a fluid enters an engine. Consequently, it is preferable to prevent the backflow of a fluid toward an engine from an exhaust gas intake port. Thus, provided is an exhaust gas processing device equipped with a reaction column having an internal space that extends in the height direction, a trunk tube for transporting a fluid, and a plurality of branch tubes which each have a spraying unit for spraying a fluid supplied from the trunk tube, and are provided at different heights from one another, wherein: the reaction column has an exhaust gas intake port located in a floor-side lateral surface; and the principal direction, defined as the center of the spraying angle of any spraying unit that sprays a fluid at the exhaust gas intake port, is 90° or less relative to the exhaust gas intake direction of the exhaust gas introduced through the exhaust gas intake port, for any branch tube among the branch tubes that is positioned at a height identical to that of the exhaust gas intake port in the height direction, and is positioned on the exhaust gas intake port side of a plane that passes through the center axis of the reaction column and is orthogonal to the exhaust gas intake direction.

Description

Exhaust gas treatment equipment

The present invention relates to an exhaust gas treatment apparatus.

Conventionally, exhaust gas introduced into the reaction tower from the exhaust gas inlet provided on the side surface of the reaction tower and liquid injected from the nozzle provided in the reaction tower are brought into gas-liquid contact, thereby oxidizing sulfur in the exhaust gas. Things (SOx) etc. were removed.
[Prior art documents]
[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 06-190240 [Patent Document 2] Japanese Patent Laid-Open No. 08-281055

Challenges to be solved

When the nozzle provided at the same position as the height of the exhaust gas inlet discharges liquid toward the exhaust gas inlet, the liquid discharged from the nozzle may flow backward from the exhaust gas inlet toward the engine. If liquid enters the engine, the engine may break. Therefore, it is desirable to suppress the backflow of liquid from the exhaust gas inlet to the engine.

General disclosure

In the first aspect of the present invention, an exhaust gas treatment apparatus for treating exhaust gas is provided. The exhaust gas treatment apparatus may include a reaction tower, a trunk pipe, and a plurality of branch pipes. The reaction tower may have an internal space extending in the height direction. The height direction may be a direction from the bottom side where the exhaust gas is introduced to the upper side where the exhaust gas is discharged. The trunk tube may carry liquid. The main pipe may extend in the height direction in the internal space of the reaction tower. The plurality of branch pipes may be provided extending from the outer wall of the trunk pipe toward the inner wall of the reaction tower. Each of the plurality of branch pipes may include an injection unit. The plurality of branch pipes may be provided at different height positions. The ejection unit may eject the liquid supplied from the trunk tube. The reaction tower may have an exhaust gas inlet on the side surface on the bottom side that introduces exhaust gas and swirls and rises along the inner surface of the reaction tower. In the branch pipe located at the same height as the exhaust gas inlet in the height direction among the plurality of branch pipes, the branch pipe is located on the exhaust gas inlet side of the plane orthogonal to the exhaust gas introduction direction and passing through the central axis of the reaction tower. The main direction of the part may be 90 degrees or less with respect to the exhaust gas introduction direction. The main direction may be defined at the center of the injection angle of the injection unit that injects the liquid with respect to the exhaust gas inlet. The exhaust gas introduction direction may be the direction of the exhaust gas introduced from the exhaust gas inlet.

The main direction of the injection unit may be 45 degrees or less with respect to the exhaust gas introduction direction.

The density of the injection part located at the same height as the exhaust gas inlet in the height direction may be smaller than the density of the injection part located at a different height from the exhaust gas inlet in the height direction.

The trunk tube may have an upper trunk tube and a lower trunk tube. The upper trunk can be located on the uppermost side. The lower trunk can be located on the most bottom side. The particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the lower trunk pipe is larger than the particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the upper trunk pipe. It can be big. The branch pipe located at the same height as the exhaust gas inlet in the height direction among the plurality of branch pipes may be provided in the lower trunk pipe.

The trunk pipe may have a middle trunk pipe between the upper trunk pipe and the lower trunk pipe. The particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the middle trunk pipe is larger than the particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the lower trunk pipe. It can be small. The particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the middle trunk pipe is larger than the particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the upper trunk pipe. It can be big.

At least one branch pipe provided in the middle trunk pipe may be located at the same height as the exhaust gas inlet in the height direction. In the branch pipe provided in the middle trunk pipe, the main direction may be 0 degree or more and 180 degrees or less with respect to the exhaust gas introduction direction. The main direction may be defined at the center of the injection angle of the injection unit that injects the liquid with respect to the exhaust gas inlet.

At least one branch pipe provided in the upper trunk pipe may be located at the same height as the exhaust gas inlet in the height direction. In the branch pipe provided in the upper trunk pipe, the main direction may be 0 degree or more and 180 degrees or less with respect to the exhaust gas introduction direction. The main direction may be defined at the center of the injection angle of the injection unit that injects the liquid with respect to the exhaust gas inlet.

Among the plurality of branch pipes, the branch pipe located on the most bottom side may be located on the upper side of the intermediate position between the bottom side and the upper side of the exhaust gas inlet.

The main direction of the injection part in at least one branch pipe located on the bottom side among the plurality of branch pipes may be inclined to the upper side.

The main direction of the injection part in at least one branch pipe located on the upper side among the plurality of branch pipes may be inclined toward the bottom side.

The reaction tower may have a flange on the uppermost side of the exhaust gas inlet.

庇 may extend in the direction of exhaust gas introduction. When viewed from the upper surface, at least a part of the collar portion may overlap with a branch pipe located on the upper side of the collar section among the plurality of branch pipes.

庇 may have an outer peripheral region. The outer peripheral region may be provided in contact with the inner wall of the reaction tower. The height in the height direction of the outer peripheral region may increase as it proceeds from the inner end to the outer end of the exhaust gas inlet.

The exhaust gas treatment device may further include an exhaust gas introduction pipe. The exhaust gas introduction pipe may be connected to the exhaust gas introduction port from the outside of the reaction tower. The exhaust gas introduction pipe may have an outer side surface and an inner side surface. The outer side surface may extend in the tangential direction of the outer shape of the reaction tower. The inner side surface may be provided to face the outer side surface. The inner side surface may extend in a direction that intersects the outer shape of the reaction tower. The inner side surface may not protrude into the internal space of the reaction tower.

The exhaust gas introduction pipe may have a first straight part and a second straight part. The first straight part may extend in the height direction. The second straight part may include a straight part perpendicular to the height direction. The second straight part may be provided between the first straight part and the exhaust gas inlet in the exhaust gas flow path.

Note that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is a figure which shows the outline | summary of the waste gas processing apparatus 200 in 1st Embodiment. FIG. 2 is a top view of AA ′ of FIG. 1. FIG. 7 is a top view of AA ′ in the first modification example of FIG. 1. It is a figure explaining the angle which the branch pipe 22-9B and the exhaust gas introduction direction 63 in FIG. 3A make. It is a figure explaining the angle which the branch pipe 22-9C and the exhaust gas introduction direction 63 in FIG. 3A make. FIG. 10 is a top view of AA ′ in the second modification of FIG. 1. It is a figure explaining the angle which the branch pipe 22-9B and the exhaust gas introduction direction 63 in FIG. 4A make. It is a figure explaining the angle which branch pipe 22-9C and exhaust gas introduction direction 63 in FIG. 4A comprise. FIG. 10 is a top view of AA ′ in the third modification of FIG. 1. It is a figure which shows the outline | summary of the waste gas processing apparatus 210 in 2nd Embodiment. It is a figure which shows the outline | summary of the waste gas processing apparatus 220 in 3rd Embodiment. It is a figure which shows the outline | summary of the waste gas processing apparatus 230 in 4th Embodiment. FIG. 10 is a top view of BB ′ in the first modified example of FIG. 8. It is a figure explaining the angle which the branch pipe 42-3B and the exhaust gas introduction direction 63 in FIG. 9A make. It is a figure explaining the angle which the branch pipe 42-3C and the waste gas introduction direction 63 in FIG. 9A make. It is a figure which shows the waste gas processing apparatus 240 in the 2nd modification of FIG. It is a figure which shows the waste gas processing apparatus 250 in 5th Embodiment. It is a figure which shows the outline | summary of the waste gas processing apparatus 260 in 6th Embodiment. It is a figure explaining the direction of the main direction 27 in 7th Embodiment. It is a figure explaining the direction of the main direction 26 in the modification of 7th Embodiment. (A) is a schematic diagram which shows a part of reaction tower 10 in 8th Embodiment. (B) is a CC 'top view of (a). It is the 1st modification in CC 'top view of Drawing 14. It is the 2nd modification in CC 'top view of Drawing 14. It is a schematic diagram which shows a part of reaction tower 10 in the 2nd modification of 8th Embodiment. It is a figure which shows the outline | summary of the waste gas introduction pipe | tube 60 in 9th Embodiment. It is a figure which shows the other example of the waste gas introduction pipe | tube 60. FIG.

Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

FIG. 1 is a diagram showing an outline of an exhaust gas treatment apparatus 200 in the first embodiment. FIG. 1 is a front view of the exhaust gas treatment apparatus 200. In FIG. 1, the cross section of the exhaust gas processing apparatus 200 is shown. However, for the purpose of facilitating understanding, the trunk tube 20, the branch tube 22, the ejection unit 24, the liquid introduction tube 28, and the baffle 29 show side surfaces rather than cross sections. Moreover, the exhaust gas inlet 62 provided in the position in front of the paper surface in the reaction tower 10 is indicated by a dotted line.

In this example, the longitudinal direction of the reaction tower 10 is the z direction. The z direction is equal to the height direction from the bottom 14 side to the top 12 side of the reaction tower 10. The x and y directions are perpendicular to each other. In this example, the x, y and z directions constitute a right-handed system. The z direction is a direction perpendicular to a plane having x and y directions. The z direction may be a direction perpendicular to the floor of the ship or a direction perpendicular to the ground. However, the z direction is not limited to the examples of these directions. The z direction may be a direction parallel to the ground. In this example, the + z direction may be referred to as “upper”, “upward”, or “upper”, and the −z direction may be referred to as “lower”, “lower”, “lower”, or “bottom”.

The exhaust gas treatment apparatus 200 includes a reaction tower 10, a main pipe 20, a plurality of branch pipes 22, a liquid introduction pipe 28, a baffle 29, an upper liquid return ring 72, a lower liquid return ring 74, and a reducer. Part 80 and a flue part 90 are provided. The reaction tower 10 and the flue portion 90 of this example have a cylindrical internal space 15 extending in the height direction. Further, the reducer portion 80 of the present example has a truncated cone-shaped internal space 15. The internal space 15 in the reaction tower 10, the reducer section 80 and the flue section 90 of this example has a common central axis 11. The central axis 11 in this example is parallel to the z direction. The central axis 11 in this example is also the central axis of the trunk tube 20.

The reaction tower 10 has an exhaust gas inlet 62 on the side surface on the bottom 14 side. The exhaust gas inlet 62 may be a conduit having a rectangular cross section when the reaction tower 10 is viewed from the front. The exhaust gas introduction port 62 in this example is a joint between an exhaust gas introduction pipe (to be described later) and the reaction tower 10.

The exhaust gas is introduced into the reaction tower 10 from the exhaust gas inlet 62 located on the bottom 14 side. The exhaust gas may be exhaust gas discharged from a power device such as a ship engine. The exhaust gas is introduced into the reaction tower 10 from the exhaust gas inlet 62 so as to swirl upward along the inner surface of the reaction tower 10. The exhaust gas in this example swirls spirally in the internal space 15 of the reaction tower 10.

The reducer unit 80 is provided above the reaction tower 10. A flue section 90 is provided on the reducer section 80. The reducer part 80 may be a joint part that connects two cylinders having different diameters. The reducer 80 may have a small diameter portion at the end in the + z direction and a large diameter portion at the end in the −z direction. In this example, the large diameter part of the reducer part 80 is connected to the reaction tower 10, and the small diameter part of the reducer part 80 is connected to the flue part 90. Thereby, the pressure loss in the exhaust gas treatment apparatus 200 can be reduced by directly connecting the reaction tower 10 and the flue section 90 as compared with the case where the inner diameter of the cylinder changes discontinuously in the height direction. . The exhaust gas is washed with liquid inside the reaction tower 10 and then discharged from the flue 90 to the outside of the exhaust gas treatment apparatus 200.

The reaction tower 10 of this example has a length in the height direction from the bottom 14 to the top 12 of 3 [m] and an inner diameter of 700 [mm]. Further, the reducer portion 80 of this example has a length in the height direction of 654 [mm], and the inner diameter of the small diameter portion is 420 [mm].

The bottom part 14 of the reaction tower 10 may function as a drainage storage part for temporarily storing the liquid that has fallen after being jetted inside the reaction tower 10. The liquid stored in the bottom 14 may be finally discharged out of the reaction tower 10 from the drainage outlet 17.

The liquid introduction pipe 28 of this example is introduced into the inside from the side surface of the reaction tower 10 in the vicinity of the bottom 14 of the reaction tower 10. The liquid introduction tube 28 of this example is a tube bent into an L shape. The liquid introduction pipe 28 in this example is watertightly connected to the trunk pipe 20 in parallel with the central axis 11. Seawater, lake water, river water, or an alkaline liquid may be introduced into the liquid introduction pipe 28 from the outside of the reaction tower 10 using a pump or the like. The liquid introduction pipe 28 and the trunk pipe 20 are fluidly connected, and the liquid introduced into the liquid introduction pipe 28 may be supplied to the trunk pipe 20.

The baffle 29 in this example is installed in the liquid introduction pipe 28. The baffle 29 may have a plane parallel to the xy plane. The baffle 29 of this example is a disk having a through opening through which the trunk tube 20 can pass. The baffle 29 is provided closer to the bottom 14 than the exhaust gas inlet 62. The baffle 29 may have a function of dividing the reaction tower 10 into a region where exhaust gas is introduced and a region where waste water is stored.

The trunk pipe 20 of this example extends in the height direction in the internal space 15 of the reaction tower 10. The trunk tube 20 may convey the liquid supplied from the liquid introduction tube 28 in the height direction. The fact that the main pipe 20 conveys the liquid in the height direction may mean that the main pipe 20 provides a path for conveying the liquid in the height direction. A plurality of branch pipes 22 are connected to the trunk pipe 20. The trunk tube 20 and the branch tube 22 are fluidly connected so that the liquid is supplied from the trunk tube 20 to the branch tube 22.

The plurality of branch pipes 22 are provided extending from the outer wall 21 of the trunk pipe 20 toward the inner wall 18 of the reaction tower 10. One end in the longitudinal direction of the branch pipe 22 may be welded to the main pipe 20. In this example, four branch pipes 22-A, 22-B, 22-C and 22-D are provided at the same height position. The four branch pipes 22-A to 22-D form a cross when the trunk pipe 20 is viewed from above. In FIG. 1, the branch pipe 22-D is omitted.

The branch pipes 22-1A to 22-nA in this example are provided so as to overlap in the height direction. The branch pipes 22-1A to 22-nA of the present example are provided at different height positions spaced apart at a constant interval in the height direction. Note that n is a natural number of 2 or more. In this example, n = 9. The pitch in the height direction of the branch pipes 22 may be 0.2 [m]. The branch pipes 22-1B to 22-nB are also provided at different height positions by a predetermined pitch. The same applies to the branch pipe 22-1C to the branch pipe 22-nC and the branch pipe 22-1D to the branch pipe 22-nD.

The at least one branch pipe 22 may be located at the same height as the exhaust gas inlet 62 in the height direction. In this example, the branch pipes 22-6 to 22-9 are located at the same height as the exhaust gas inlet 62. In addition, in this example, the branch pipe 22 is located at the same height as the exhaust gas inlet 62. The height position of the branch pipe 22 is located within the range of the length in the height direction of the exhaust gas inlet 62. To tell. In this example, it is possible to prevent the liquid from flowing back to the engine by devising the injection direction of the liquid injected from the branch pipe 22 located at the same height as the exhaust gas inlet 62.

Each of the plurality of branch pipes 22 has an injection unit 24. In this example, one branch pipe 22 has two injection parts 24. In addition, the number of the injection parts 24 which one branch pipe 22 has is not limited to two, Three or more may be sufficient. The injection unit 24 may be connected to the branch pipe 22 by screwing means, or may be connected to the branch pipe 22 by welding.

The injection unit 24 injects the liquid supplied from the trunk tube 20 inside the reaction tower 10. The jetted liquid changes into a fine water droplet or mist. By bringing the injected liquid and exhaust gas into gas-liquid contact, sulfur oxides and the like in the exhaust gas are absorbed by the liquid. Thereby, exhaust gas can be washed. The ejection unit 24 may be a spray nozzle that ejects liquid in an empty cone shape. In this example, the injection port of the injection part 24 is provided in the part which attached | subjected x mark of FIG.

FIG. 2 is a top view of AA ′ of FIG. In this example, the branch pipe 22-9 will be described by showing a top view of AA ′. However, the branch pipes 22-6 to 22-8 may have the same configuration as the branch pipes 22-9.

The exhaust gas treatment apparatus 200 includes an exhaust gas introduction pipe 60 connected to the exhaust gas introduction port 62 from the outside of the reaction tower 10. The exhaust gas introduction pipe 60 of this example is a pipe having a rectangular cross section parallel to the yz plane. The exhaust gas introduction pipe 60 of this example extends in the x direction and is connected to the side surface of the reaction tower 10. The exhaust gas introduction pipe 60 has an outer side surface 64 and an inner side surface 66.

The outer side surface 64 extends in the tangential direction in the circumferential outer shape of the reaction tower 10. The inner side surface 66 faces the outer side surface 64. Further, the inner side surface 66 extends in a direction intersecting with the outer shape of the reaction tower 10. Note that the distance between the outer side surface 64 and the inner side surface 66 may be smaller than the radius of the reaction tower 10. In this example, the tangential direction of the reaction column 10 at the intersection of the inner side surface 66 and the outer shape of the reaction column 10 and the inner side surface 66 form a predetermined angle α smaller than 90 degrees. Note that the outer shape of the reaction tower 10 may be read as the outer diameter of the reaction tower 10 in consideration of the wall thickness defined by the inner diameter and the outer diameter in the cylindrical reaction tower 10. An intersection line between the inner side surface 66 and the outer shape of the reaction tower 10 is indicated by an intersection point 61 in FIG. Similarly, there may be a case where an intersection line between surfaces is simply indicated by an intersection point.

In this example, the inner side surface 66 does not protrude into the internal space 15 of the reaction tower 10. Therefore, the exhaust gas introduction pipe 60 of this example is advantageous in that it does not hinder the exhaust gas swirlability in the internal space 15. As the exhaust gas swirls well in the internal space 15, gas-liquid contact is ensured, so that sulfur oxides and the like can be more reliably removed.

In this example, the flow of exhaust gas introduced from the exhaust gas introduction pipe 60 into the internal space 15 in the vicinity of the intersection 61 is defined as an exhaust gas introduction direction 63. In this example, the exhaust gas introduction direction 63 is the −x direction. The exhaust gas in this example rises in the z direction while turning clockwise.

The injection unit 24 of this example injects liquid from the injection port 23 so as to assist the swirling of the exhaust gas. The ejection unit 24 of the present example ejects liquid in the clockwise direction at each position. Specifically, in this example, the ejection unit 24 of the branch pipe 22-9A ejects liquid in the −x direction. The ejection unit 24 of the branch pipe 22-9B ejects liquid in the −y direction. The ejection unit 24 of the branch pipe 22-9C ejects liquid in the + x direction. The ejection unit 24 of the branch pipe 22-9D ejects liquid in the + y direction.

In FIG. 2, the liquid diffuses in a substantially triangular shape with the injection port 23 of the injection unit 24 as one vertex. In this example, an angle formed by two sides connected to the injection port 23 which is the apex is an injection angle 25. The injection angle 25 may be not less than 60 degrees and not more than 120 degrees. In this example, the center of the injection angle 25 is the main direction. That is, the main direction in this example is a bisector of the injection angle 25.

However, in this example, the main direction 26 and the main direction 27 are distinguished from each other. The main direction 26 is the main direction of the ejection unit 24 that ejects liquid to the exhaust gas inlet 62. On the other hand, the main direction 27 is the main direction of the injection unit 24 that does not inject liquid to the exhaust gas inlet 62. Note that the branch pipe 22 provided with the injection unit 24 having the main direction 26 is located at the same height as the exhaust gas inlet 62.

The injection port 23 of the branch pipe 22-9B has a main direction 26 because it faces the exhaust gas introduction port 62. In this example, the main direction 26 of the branch pipe 22-9B is 90 degrees with respect to the exhaust gas introduction direction 63. On the other hand, when the main direction 26 and the exhaust gas inlet 62 are larger than 90 degrees, the injected liquid has a vector component in the + x direction with respect to the exhaust gas introduced in the −x direction. Therefore, the introduction of the exhaust gas into the reaction tower 10 is obstructed, and there is a possibility that the reverse vector component liquid flows back to the engine. In this example, the main direction 26 and the exhaust gas introduction direction 63 are set to 0 degree or more and 90 degrees or less, so that the liquid can be prevented from flowing backward from the exhaust gas introduction port 62 to the engine.

In this example, the branch pipe 22 is located at the same height as the exhaust gas inlet 62, and the exhaust gas is introduced from the virtual plane 13 that is orthogonal to the exhaust gas introduction direction 63 and passes through the central axis 11 of the reaction tower 10. Attention is paid to the branch pipe 22 located on the mouth 62 side. In this example, if the main direction 26 of the injection part 24 of the branch pipe 22 located closer to the exhaust gas introduction port 62 than the virtual plane 13 is 0 degree or more and 90 degrees or less with respect to the exhaust gas introduction direction 63, the liquid Backflow from the exhaust gas inlet 62 to the engine can be suppressed.

Even if the main direction 26 and the exhaust gas introduction direction 63 are 90 degrees or less, depending on the magnitude of the injection angle 25, some liquids may have a negative vector with respect to the exhaust gas introduction direction 63. However, since the influence of some liquids is limited, it is not considered in this example. If the main direction 26 and the exhaust gas introduction direction 63 are not less than 0 degrees and not more than 90 degrees, the above-described advantageous effects may be obtained.

In this example, it is assumed that the injection ports 23 of the branch pipe 22-9A, the branch pipe 22-9C, and the branch pipe 22-9D do not face the exhaust gas inlet 62. Therefore, the injection parts 24 of the branch pipes 22-9A, the branch pipes 22-9C, and the branch pipes 22-9D have a main direction 27. However, as in the examples of FIGS. 3A to 3C and FIGS. 4A to 4C described later, the branch pipe 22-9C has a predetermined angle β (0 <0) clockwise around the central axis 11 as compared with the example of FIG. It is assumed that the injection port 23 of the branch pipe 22-9C faces the exhaust gas introduction port 62 when it is provided by being rotated by (β ≦ 90 degrees). Therefore, in the example of FIGS. 3A and 3C and FIGS. 4A and 4C, the injection unit 24 of the branch pipe 22-9C has a main direction 26.

FIG. 3A is a top view of AA ′ in the first modification of FIG. FIG. 3B is a diagram illustrating an angle formed by the branch pipe 22-9B and the exhaust gas introduction direction 63 in FIG. 3A. FIG. 3C is a diagram for explaining an angle formed by the branch pipe 22-9C and the exhaust gas introduction direction 63 in FIG. 3A.

This example is an example in which the branch pipes 22-9A to 22-9D in FIG. 2 are rotated clockwise by 30 degrees around the central axis 11. In this example, the injection ports 23 of the branch pipe 22-9B and the branch pipe 22-9C face the exhaust gas introduction port 62. Therefore, the injection parts 24 of the branch pipes 22-9B and 22-9C have a main direction 26. On the other hand, the injection part 24 of the branch pipe 22-9A and the branch pipe 22-9D has a main direction 27.

In this example, the main direction 26 of the injection unit 24 in the branch pipe 22-9B is 60 degrees with respect to the exhaust gas introduction direction 63. On the other hand, the main direction 26 of the injection unit 24 in the branch pipe 22-9C is 150 degrees with respect to the exhaust gas introduction direction 63. Therefore, in this example, the ejecting unit 24 of the branch pipe 22-9C does not eject liquid. Thereby, it can suppress that a liquid flows backward from the exhaust gas inlet 62 to an engine. In addition, the state which does not eject a liquid is shown by x of a thick line in FIG. 3A.

FIG. 4A is a top view of AA ′ in the second modification of FIG. FIG. 4B is a diagram illustrating an angle formed by the branch pipe 22-9B and the exhaust gas introduction direction 63 in FIG. 4A. FIG. 4C is a diagram illustrating an angle formed by the branch pipe 22-9C and the exhaust gas introduction direction 63 in FIG. 4A.

This example is an example in which the branch pipes 22-9A to 22-9D in FIG. 2 are rotated by 45 degrees clockwise around the central axis 11. Also in this example, the branch pipes 22-9B and the branch pipes 22-9C have a main direction 26, and the injection portions 24 of the branch pipes 22-9A and the branch pipes 22-9D have a main direction 27.

The main direction 26 of the injection unit 24 in the branch pipe 22-9B may be 0 degree or more and 45 degrees or less with respect to the exhaust gas introduction direction 63. In this example, the main direction 26 of the injection unit 24 in the branch pipe 22-9B is 45 degrees with respect to the exhaust gas introduction direction 63. On the other hand, the main direction 26 of the injection unit 24 in the branch pipe 22-9C is 135 degrees with respect to the exhaust gas introduction direction 63. Therefore, in this example, the ejecting unit 24 of the branch pipe 22-9C does not eject liquid. Thereby, it can suppress that a liquid flows backward from the exhaust gas inlet 62 to an engine. As in FIG. 3A, the situation where no liquid is ejected is indicated by a bold x in FIG. 4A.

FIG. 5 is a top view of AA ′ in the third modification of FIG. In this example, the branch pipes 22-9A to 22-9D in FIG. 2 are rotated about 45 degrees clockwise around the central axis 11. Also in this example, the branch pipes 22-9B and the branch pipes 22-9C have a main direction 26, and the injection portions 24 of the branch pipes 22-9A and the branch pipes 22-9D have a main direction 27.

However, in this example, when the main direction 26 and the exhaust gas introduction direction 63 are larger than 90 degrees, the injection unit 24 itself is not provided instead of the injection unit 24 not injecting liquid. In this example, the main direction 26 of the injection unit 24 in the branch pipe 22-9C is 135 degrees with respect to the exhaust gas introduction direction 63. Therefore, the injection part 24 is not provided in the branch pipe 22-9C of this example. The branch pipe 22-9C may not be provided.

In this example, since the branch pipe 22-6 to the branch pipe 22-9 are positioned at the same height as the exhaust gas inlet 62, the injection unit 24 is connected to the branch pipe 22-6C and the branch pipe 22-9C. Not provided. Thereby, the density of the injection part 24 of the branch pipe 22 located at the same height as the exhaust gas introduction port 62 in the height direction is made equal to the injection part of the branch pipe 22 located at a different height from the exhaust gas introduction port 62 in the height direction. The density is smaller than 24.

In addition, in this example, the density of the injection part 24 of the branch pipe 22 means the number of the injection parts 24 of the branch pipe 22 provided in the same height. In this example, the density of the jetting parts 24 of the branch pipes 22 refers to the number of jetting parts 24 of the branch pipes 22-nA to 22-nD provided at the same height. More specifically, in this example, the density of the injection portion 24 of the branch pipe 22 from the branch pipe 22-6 to the branch pipe 22-9 is 6, but from the branch pipe 22-1 to the branch pipe 22-5. The density of the injection part 24 of the branch pipe 22 is 8.

FIG. 6 is a diagram showing an outline of the exhaust gas treatment apparatus 210 in the second embodiment. The trunk tube 20 of this example includes an upper trunk tube 30, a middle trunk tube 40, and a lower trunk tube 50. This is different from the first embodiment. The upper trunk tube 30 and the middle trunk tube 40 are also provided with a plurality of branch pipes 32 and a plurality of branch pipes 42 extending from each outer wall 21 toward the inner wall 18 of the reaction tower 10.

The upper trunk pipe 30 is located on the uppermost 12 side of the trunk pipe 20, and the lower trunk pipe 50 is located on the lowest bottom 14 side of the trunk pipe 20. The middle trunk tube 40 is located between the upper trunk tube 30 and the lower trunk tube 50. The inner diameter of the lower trunk 50 is the largest, the middle trunk 40 is the second largest, and the upper trunk 30 is the smallest.

The liquid introduction pipe 28 supplies liquid only to the lower trunk pipe 50. The liquid introduction pipe 38 and the liquid introduction pipe 48 are connected to the upper trunk pipe 30 and the middle trunk pipe 40, respectively, and supply the liquid independently. The upper trunk tube 30 and the middle trunk tube 40 are fixed to each other by the upper connection portion 31, and the middle trunk tube 40 and the lower trunk tube 50 are physically fixed to each other by the lower connection portion 41.

The upper trunk pipe 30 of this example has branch pipes 32-1 to 32-3. Each of the branch pipes 32-1 to 32-3 has an injection unit 34. Similarly, the middle trunk pipe 40 of this example has branch pipes 42-1 to 42-3, and the lower trunk pipe 50 of this example has branch pipes 52-1 to 52-3. Further, the branch pipe 42-1 to the branch pipe 42-3 have an injection part 44, and the branch pipe 52-1 to the branch pipe 52-3 have an injection part 54.

The particle size of the liquid droplets ejected from the ejecting section 54 in the branch pipe 52 provided in the lower trunk pipe 50 is the liquid liquid ejected from the ejecting section 34 in the branch pipe 32 provided in the upper trunk pipe 30. It is larger than the particle size of the droplet. In addition, the particle size of the liquid droplets ejected from the ejection unit 44 in the branch pipe 42 provided in the middle trunk tube 40 is equal to the liquid ejected from the ejection unit 54 in the branch pipe 52 provided in the lower trunk tube 50. The droplet diameter is smaller than that of the liquid droplets and larger than the particle diameter of the liquid droplets ejected from the ejection portion 34 in the branch pipe 32 provided in the upper trunk tube 30. In order to realize this, the opening area of the injection port 23 may be the largest in the injection unit 54, then the injection unit 44, and the injection unit 34 may be the smallest.

The concentration of sulfur oxides in the exhaust gas decreases from the bottom 14 side toward the top 12 side. Like this example, by reducing the size of the droplets ejected from the bottom 14 side toward the top 12 side, the probability that the liquid and sulfur oxides in the exhaust gas come into contact can be improved. . Therefore, the exhaust gas can be treated more reliably than in the case where the size of the droplet is constant in the height direction.

The lower trunk pipe 50 may be provided with at least one branch pipe 52 located at the same height as the exhaust gas inlet 62 in the height direction. In the present example, the branch pipe 52-3 located closest to the bottom 14 among the branch pipes 52 of the lower trunk pipe 50 is located at the same height as the exhaust gas inlet 62. The arrangement of the branch pipe 52 and the injection unit 54 may be the same as that of the branch pipe 22 and the injection unit 24 described with reference to FIGS. Specifically, the main direction 26 in the injection unit 54 of the branch pipe 52 may be 0 degree or more and 90 degrees or less with respect to the exhaust gas introduction direction 63, and may be 0 degree or more and 45 degrees or less. Further, by not providing the branch pipe 52-3C, the density of the branch pipe 52-3 may be made smaller than the densities of the branch pipe 52-1 and the branch pipe 52-2.

In this example, the main direction of the injection unit 54 that injects a liquid having a particle size larger than that of the injection unit 34 and the injection unit 44 does not have a vector opposite to the exhaust gas introduction direction 63. The volume of the droplet is directly proportional to the mass of the droplet. Therefore, it is possible to effectively suppress large droplets having a relatively large mass and not easily affected by the exhaust gas flow from flowing back from the exhaust gas inlet 62 to the engine.

FIG. 7 is a diagram showing an outline of the exhaust gas treatment device 220 in the third embodiment. In this example, all the branch pipes 52-1 to 52-3 in the lower trunk pipe 50 are positioned at the same height as the exhaust gas inlet 62. The arrangement of the branch pipe 52 and the injection unit 54 may be the same as that of the branch pipe 22 and the injection unit 24 described with reference to FIGS. Also in this example, the arrangement of the branch pipes 52 and the injection units 54 may be the same as in the third embodiment. Thereby, it is possible to suppress a large droplet from the injection unit 54 from flowing backward from the exhaust gas inlet 62 to the engine.

FIG. 8 is a diagram showing an outline of the exhaust gas treatment device 230 in the fourth embodiment. At least one branch pipe 42 provided in the middle trunk pipe 40 may be positioned at the same height as the exhaust gas inlet 62 in the height direction. In this example, in addition to the three branch pipes 52, the branch pipe 42-3 located closest to the bottom 14 among the branch pipes 42 of the middle trunk pipe 40 is located at the same height as the exhaust gas inlet 62. In this example, the configuration of the branch pipe 52 is the same as that of the third embodiment.

However, in this example, the main direction 26 of the injection portion 44 of the branch pipe 42 that injects the liquid to the exhaust gas introduction port 62 is not less than 0 degrees and not more than 180 degrees with respect to the exhaust gas introduction direction 63. That is, the injection unit 44 in the branch pipe 42 of the middle trunk pipe 40 may inject liquid regardless of the angle formed by the main direction 26 and the exhaust gas introduction direction 63. More specifically, the ejection unit 44 may eject the liquid even when the main direction 26 is greater than 90 degrees and equal to or less than 180 degrees. For comparison purposes, see the examples of branches 22-9C of FIGS. 3A and 3C and FIGS. 4A and 4C. In this example, the branch pipe 42 positioned at the same height as the exhaust gas inlet 62 may not be thinned out. In this example, since the mass of the liquid droplet ejected by the ejection unit 44 is smaller than the mass of the liquid droplet ejected by the ejection unit 54, the ejection unit is smaller than the liquid droplet ejected by the ejection unit 54. The liquid droplets ejected by 44 hardly flow back to the engine.

In this example, in addition to the branch pipe 52 of the lower trunk pipe 50, the branch pipe 42 of the middle trunk pipe 40 also overlaps with the exhaust gas inlet 62 in the height direction, so that the length in the height direction of the trunk pipe 20 is reduced. can do. Thereby, compared with 1st to 4th embodiment, the height direction length of the exhaust gas processing apparatus 230 can be made small. Since the exhaust gas treatment device 230 may be provided in the interior of a ship, which is a limited space, the advantage of being able to downsize the exhaust gas treatment device 230 is important.

FIG. 9A is a top view of BB ′ in the first modification of FIG. FIG. 9B is a diagram illustrating an angle formed by the branch pipe 42-3B and the exhaust gas introduction direction 63 in FIG. 9A. FIG. 9C is a diagram illustrating an angle formed by the branch pipe 42-3C and the exhaust gas introduction direction 63 in FIG. 9A. In FIG. 9A, the branch pipe 42-3 and the injection unit 44 of the middle trunk pipe 40 are shown.

As shown in FIG. 9B, the main direction 26 of the injection section 44 in the branch pipe 42-3B is 45 degrees with respect to the exhaust gas introduction direction 63. On the other hand, as shown in FIG. 9C, the main direction 26 of the injection section 44 in the branch pipe 42-3C is 135 degrees with respect to the exhaust gas introduction direction 63. As described above, in this example, the liquid may be ejected from the ejection unit 44 provided in the branch pipe 42-3C.

FIG. 10 is a view showing an exhaust gas treatment apparatus 240 in the second modification of FIG. At least one branch pipe 32 provided in the upper trunk pipe 30 may be positioned at the same height as the exhaust gas inlet 62 in the height direction. In this example, the branch pipe 32-3 located closest to the bottom 14 among the branch pipes 32 of the upper trunk pipe 30 is located at the same height as the exhaust gas inlet 62. Note that all of the branch pipe 42 and the branch pipe 52 are located at the same height as the exhaust gas inlet 62.

In this example, the main direction 26 of the injection unit 34 and the injection unit 44 for injecting liquid to the exhaust gas introduction port 62 is 0 degree or more and 180 degrees or less with respect to the exhaust gas introduction direction 63. That is, the ejection unit 34 and the ejection unit 44 may eject liquid regardless of the angle formed by the main direction 26 and the exhaust gas introduction direction 63. Further, the branch pipe 32 and the branch pipe 42 positioned at the same height as the exhaust gas inlet 62 may not be thinned out. Thereby, the height direction length of the exhaust gas treatment apparatus 240 of this example can be further reduced as compared with the exhaust gas treatment apparatus 230 of the fourth embodiment.

FIG. 11 is a view showing an exhaust gas treatment apparatus 250 in the fifth embodiment. The trunk tube 20 of this example is different from the above-described embodiment. In this example, the upper trunk pipe 30 and the middle trunk pipe 40 are connected to each other by an upper joint portion 76. Similarly, the inner trunk pipe 40 and the lower trunk pipe 50 are connected to each other by a lower joint portion 78. Accordingly, in the trunk tube 20 of the present example, the upper trunk tube 30, the middle trunk tube 40, and the lower trunk tube 50 are fluidly connected in the height direction. The liquid is supplied from the bottom 14 side of the lower trunk pipe 50 through the liquid introduction pipe 28 and reaches the upper trunk pipe 30. The upper joint portion 76 and the lower joint portion 78 may have a frustoconical internal space in which the diameter of the internal space decreases as it proceeds in the height direction. In this respect, this example is different from the examples of FIGS. However, of course, the arrangement of the branch pipe 32, the branch pipe 42, or the branch pipe 52 in FIGS. 6 to 10 may be applied to this example.

FIG. 12 is a diagram showing an outline of the exhaust gas treatment apparatus 260 in the sixth embodiment. In the following examples, the description will be made using the configuration of the trunk tube 20 of the first embodiment in order to simplify the description. However, the examples in FIGS. 1 to 11 may be applied as appropriate to the examples after this example.

In this example, among the plurality of branch pipes 22, the branch pipe 22 located closest to the bottom 14 side is located closer to the upper part 12 than an intermediate position 65 between the bottom part 14 side and the upper part 12 side of the exhaust gas inlet 62. The length in the height direction of the exhaust gas inlet 62 is indicated by two Lz. The intermediate position 65 is located between the two Lz. Thereby, compared with the case where the branch pipe 22 is provided between the intermediate position 65 of the exhaust gas inlet 62 and the bottom 14 side, the gas-liquid contact between the exhaust gas and the liquid can be more sufficiently secured. it can. The number of branch pipes 22 in this example is smaller than the number of branch pipes in the example of FIG.

FIG. 13A is a diagram for explaining the orientation of the main direction 27 in the seventh embodiment. As shown in the figure, in this example, the main direction 27 of the injection part 24 in the branch pipe 22 located on the uppermost 12 side is inclined toward the bottom part 14 side. In this example, the branch pipe 22-1 located on the uppermost side 12 is at a position higher than the exhaust gas inlet 62. Therefore, the main direction of the injection unit 24 provided in the branch pipe 22-1 is described as the main direction 27, not the main direction 26. It is not necessary to limit to the branch pipe 22 positioned on the uppermost 12 side, and the main direction 27 of the injection unit 24 in the at least one branch pipe 22 positioned on the upper 12 side may be inclined to the bottom 14 side. . Further, the branch pipe 22 positioned on the upper side 12 means, for example, the branch pipe 22 positioned above the uppermost portion of the exhaust gas inlet 62. The main direction 27 is preferably adjusted so that the liquid is not ejected toward the bottom 14 side in parallel with the height direction. When the injection angle 25 is 90 degrees, the main direction 27 may be inclined toward the bottom 14 by a predetermined angle of several degrees to 40 degrees with respect to the horizontal direction, and a predetermined angle of 10 degrees to 30 degrees You may incline only to the bottom part 14 side.

Since the injected liquid absorbs sulfur oxides and the like, it is desirable that the injected liquid is not discharged from the flue portion 90. In this example, since the injection port 23 of the injection part 24 on the uppermost 12 side faces the bottom part 14 side, it is possible to suppress the liquid from being discharged from the flue part 90 to the outside of the exhaust gas treatment apparatus. Although not shown, the main direction 26 or the main direction 27 of the injection unit 24 provided on the branch pipe 22-2 and the branch pipe 22-3 on the bottom 14 side of the branch pipe 22-1 is an xy plane. And may be parallel.

FIG. 13B is a diagram illustrating the orientation of the main direction 26 in the modification of the seventh embodiment. As shown in the figure, in this example, the main direction 26 of the injection unit 24 in the branch pipe 22 located closest to the bottom 14 is inclined toward the upper part 12. In this example, the branch pipe 22-9 located closest to the bottom 14 is located at the same height as the exhaust gas inlet 62. Therefore, the main direction of the injection unit 24 provided in the branch pipe 22-9B is referred to as a main direction 26. In this example, since the injection port 23 of the injection unit 24 closest to the bottom portion 14 faces the upper portion 12 side, the swirlability of exhaust gas can be further improved as compared with the first to sixth embodiments. The main pipe 26 of the injection unit 24 in at least one branch pipe 22 located on the bottom 14 side may be inclined to the upper part 12 side. . Further, the branch pipe 22 positioned on the bottom 14 side means, for example, the branch pipe 22 positioned below the uppermost portion of the exhaust gas inlet 62. The main direction 26 is preferably adjusted so that the liquid is not ejected toward the upper portion 12 side in parallel with the height direction. When the injection angle 25 is 90 degrees, the main direction 26 may be inclined to the upper part 12 side by a predetermined angle of several degrees to 40 degrees with respect to the horizontal direction, and a predetermined angle of 10 degrees to 30 degrees Only the upper 12 side may be inclined.

FIG. 14A is a schematic diagram showing a part of the reaction tower 10 in the eighth embodiment. FIG. 14B is a top view of CC ′ of FIG. As shown in FIG. 14A, the reaction tower 10 of the present example has a flange 100 on the uppermost part 12 side of the exhaust gas inlet 62. The flange 100 is a plate member that extends in the exhaust gas introduction direction 63. This is different from the first to seventh embodiments. Of course, this example may be applied to the first to seventh embodiments.

As shown in FIG. 14 (b), the eaves part 100 is provided inside the reaction tower 10. The eaves part 100 has an outer peripheral region 112 provided in contact with the inner wall 18 of the reaction tower 10. The outer peripheral region 112 may be a joint between the exhaust gas introduction pipe 60 and the outer shape of the reaction tower 10. In this example, the outer peripheral region 112 has a circular arc shape conforming to the inner wall 18 of the reaction tower 10. The outer peripheral region 112 in this example has an arc shape from the intersection 61 between the outer shape of the reaction tower 10 and the inner side surface 66 to the intersection 162 between the outer shape of the reaction tower 10 and the outer side surface 64.

The heel part 100 protrudes from the inner wall 18 of the reaction tower 10 into the internal space 15. In the present example, the tip region of the collar portion 100 protruding from the inner wall 18 is referred to as an inner region 114. The inner region 114 in this example is also a straight region connecting both ends of the outer peripheral region 112.

As described above, in the branch pipe 22 positioned at the same height as the exhaust gas introduction port 62, the main direction 26 of the injection unit 24 that injects liquid to the exhaust gas introduction port 62 is 90 degrees or less with respect to the exhaust gas introduction direction 63. And On the other hand, the main direction 27 of the injection part 24 of the branch pipe 22 located at a different height from the exhaust gas introduction port 62 may be larger than 90 degrees with respect to the exhaust gas introduction direction 63. In this case, the main direction 27 may have a vector opposite to the exhaust gas introduction direction 63.

Therefore, in this example, the buttocks 100 are provided. Thereby, the liquid which has a vector of the reverse direction with respect to the exhaust gas introduction direction 63 among the liquids injected from the injection part 24 located above the collar part 100 is suppressed from entering the exhaust gas introduction pipe 60. Can do. In addition, the flange portion 100 can also prevent the liquid that has grown to a large particle diameter along the inner wall 18 from entering the exhaust gas introduction pipe 60.

FIG. 15A is a first modification in the top view of CC ′ of FIG. FIG. 15B is a second modification of the CC ′ top view of FIG. The example of FIGS. 15A and 15B is different from the example of FIG. FIG. 15B is an example in which the branch pipe 22 of FIG. 15A is rotated about 45 degrees clockwise around the central axis 11.

At least a part of the collar part 100 may overlap with the branch pipe 22 positioned on the upper part 12 side of the collar part 100 when viewed from the upper surface. In this example, viewing from the top means viewing from the top 12 to the bottom 14. In this example, the collar part 100 is located between the branch pipe 22-5 and the branch pipe 22-6. A part of the collar part 100 of this example overlaps the branch pipe 22-5A when viewed from the upper surface.

In this example, the outer peripheral region 112 has an arc shape from an intersection 61 between the outer shape of the reaction tower 10 and the inner side surface 66 to a position 164 that advances further clockwise than the intersection 162 between the outer shape of the reaction tower 10 and the outer side surface 64. It is. Thereby, the area of the collar part 100 when the collar part 100 is viewed from above is larger than that of the ninth embodiment. Therefore, the liquid can be prevented from entering the exhaust gas introduction pipe 60 more effectively than the ninth embodiment.

FIG. 16 is a schematic diagram showing a part of the reaction tower 10 in the second modification of the eighth embodiment. The height in the height direction of the outer peripheral region 112 of the flange portion 100 may increase as it proceeds from the inner end to the outer end of the exhaust gas inlet 62. In the present example, the inner end portion is the end portion on the uppermost 12 side of the inner side surface 66. In the present example, the outer end portion is the end portion on the uppermost 12 side of the outer side surface 64. In other examples, the outer end may be at the position 164.

In this example, the height of the outer peripheral region 112 and the inner region 114 in an arbitrary x direction may be the same. The height of the outer peripheral region 112 in this example monotonously increases from the intersection point 61 toward the intersection point 162. In another example, the height of the outer peripheral region 112 may be an arc shape along the inner wall 18 that increases from the intersection point 61 toward the intersection point 162 so as to correspond to the turning of the exhaust gas.

In this example, the swirlability of the exhaust gas introduced into the reaction tower 10 can be promoted by relatively reducing the height (intersection 61) on the central axis 11 side of the flange portion 100 when viewed from the side. . In another example, this example may be applied to the example of FIG. In that case, the height of the outer peripheral region 112 may increase from the intersection 61 toward the position 164.

FIG. 17 is a diagram showing an outline of the exhaust gas introduction pipe 60 in the ninth embodiment. The exhaust gas introduction pipe 60 may have a first straight part 68 and a second straight part 69. The first straight portion 68 may be provided extending in the height direction. The second straight portion 69 may be provided between the first straight portion 68 and the exhaust gas inlet 62 in the exhaust gas flow path. The second straight part 69 may include a straight part perpendicular to the height direction. The second straight portion 69 of this example is connected to the first straight portion 68 on the bottom portion 14 side.

The exhaust gas introduction pipe 60 of this example has a so-called inverted L shape. Therefore, compared with the case where the first straight portion 68 is connected to the second straight portion 69 on the upper portion 12 side, the injected liquid may easily flow back to the engine. Therefore, when the exhaust gas introduction pipe 60 of this example is used, the configuration of the main direction 26 and the injection unit 24 and the configuration of the flange unit 100 described in FIGS. 1 to 16 may be applied. This may prevent the liquid from flowing back to the engine.

FIG. 18 is a view showing another example of the exhaust gas introduction pipe 60. The second straight part 69 of this example is connected to the first straight part 68 on the upper part 12 side. That is, the exhaust gas introduction pipe 60 of this example has an L shape in the vicinity of the position where it is connected to the reaction tower 10. This is different from the ninth embodiment. In addition, the configuration of the exhaust gas introduction pipe 60 may be appropriately determined on the upstream side of the exhaust gas from the first straight portion 68.

The exhaust gas introduction pipe 60 of this example includes a fourth straight portion 169, a third straight portion 168, a fifth straight portion 167, a first straight portion 68, and a second straight portion 69 in order from upstream to downstream of the exhaust gas. The third straight portion 168 extends in the height direction similarly to the first straight portion 68. The fourth straight part 169 includes a straight part perpendicular to the height direction on the bottom 14 side of the third straight part 168. The fifth straight part 167 is provided between the first straight part 68 and the third straight part 168. The fifth straight part 167 includes a straight part perpendicular to the height direction on the upper part 12 side of the first straight part 68 and the third straight part 168. Thereby, in the flow path of exhaust gas, a convex part is provided upward in the height direction.

In the exhaust gas introduction pipe 60 of the present example, the height direction length of the first straight part 68 functions as a wall that prevents the back flow of the liquid. Therefore, the back flow of the liquid can be suppressed by the configuration of the exhaust gas introduction pipe 60 as compared with the ninth embodiment. Of course, the main direction 26 and the configuration of the injection unit 24 and the configuration of the collar unit 100 described in FIGS. 1 to 16 may be applied.

As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

The execution order of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior”. It should be noted that they can be implemented in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for the sake of convenience, it means that it is essential to carry out in this order is not.

10 .. Reaction tower, 11 .... Central axis, 12 .... Top, 13 .... Virtual plane, 14 .... Bottom, 15 .... Internal space, 17 .... Drainage outlet, 18 .... Inner wall, 20 .... Trunk Pipe, 21 ... outer wall, 22 ... branch pipe, 23 ... jet port, 24 ... jetting section, 25 ... jet angle, 26 ... main direction, 27 ... main direction, 28 ... liquid introduction pipe, 29 .... Baffle, 30 ... Upper trunk pipe, 31 ... Upper connection part, 32 ... Branch pipe, 34 ... Injection section, 38 ... Liquid introduction pipe, 40 ... Middle trunk pipe, 41 ... Lower connection , 42 .. Branch pipe, 44 .. Injection section, 48 .. Liquid introduction pipe, 50 .. Lower trunk pipe, 52 .. Branch pipe, 54 .. Injection section, 60 .. Exhaust gas introduction pipe, 61. Intersection, 62 ·· Exhaust gas inlet, 63 ·· Exhaust gas introduction direction, 64 ·· Outside side surface, 65 ·· Intermediate position, 66 ·· Inside side surface, 68 ·· First straight , 69 ··· 2nd straight portion, 72 ··· Upper liquid return ring, 74 · · Lower liquid return ring, 76 · · Upper joint portion, 78 · · Lower joint portion, 80 · · Reducer portion, 90 · · · • Flue section, 100 ·· Hut, 112 ·· Outer peripheral area, 114 ·· Inner area, 162 ·· Intersection, 164 ·· Position, 167 ·· Fifth straight section, 168 ·· Third straight section, 169 ·・ Fourth straight section, 200 ..Exhaust gas treatment device, 210 ..Exhaust gas treatment device, 220 ..Exhaust gas treatment device, 230 ..Exhaust gas treatment device, 240 ..Exhaust gas treatment device, 250.・ Exhaust gas treatment equipment

Claims

An exhaust gas treatment device for treating exhaust gas,
A reaction tower having an internal space extending in the height direction from the bottom side where the exhaust gas is introduced to the upper side where the exhaust gas is discharged;
A trunk pipe extending in the height direction in the internal space of the reaction tower and conveying a liquid;
A plurality of injection portions that are provided to extend from the outer wall of the main tube toward the inner wall of the reaction tower, each of the injection units that injects the liquid supplied from the main tube, are provided at different height positions. With branch pipes,
The reaction tower has an exhaust gas introduction port on the side surface on the bottom side for introducing exhaust gas to swirl up along the inner surface of the reaction tower,
Among the plurality of branch pipes, it is located at the same height as the exhaust gas inlet in the height direction, and is located closer to the exhaust gas inlet than a plane orthogonal to the exhaust gas introduction direction and passing through the central axis of the reaction tower. In the branch pipe, the main direction defined by the center of the injection angle of the injection unit that injects the liquid to the exhaust gas introduction port is 90 degrees with respect to the exhaust gas introduction direction of the exhaust gas introduced from the exhaust gas introduction port. An exhaust gas treatment device that is:
The exhaust gas treatment apparatus according to claim 1, wherein the main direction of the injection unit is 45 degrees or less with respect to the exhaust gas introduction direction.
The density of the injection unit located at the same height as the exhaust gas inlet in the height direction is smaller than the density of the injection unit located at a height different from the exhaust gas inlet in the height direction. Or the exhaust gas treatment apparatus according to 2;
The stem pipe is
An upper trunk located on the uppermost side;
The lower trunk located on the bottom side most,
The particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the lower trunk pipe is the size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the upper trunk pipe. Larger than the particle size,
The exhaust gas processing apparatus according to any one of claims 1 to 3, wherein the branch pipe positioned at the same height as the exhaust gas inlet in the height direction is provided in the lower trunk pipe.
The stem pipe has a middle trunk pipe between the upper trunk pipe and the lower trunk pipe,
The particle size of the liquid droplets ejected from the ejection unit in the branch pipe provided in the middle trunk pipe is the same as that of the liquid droplets ejected from the ejection unit in the branch pipe provided in the lower trunk pipe. The exhaust gas treatment apparatus according to claim 4, wherein the exhaust gas treatment apparatus is smaller than a particle diameter and larger than a particle diameter of a liquid droplet ejected from the ejection section in a branch pipe provided in the upper trunk pipe.
At least one branch pipe provided in the middle trunk pipe is located at the same height as the exhaust gas inlet in the height direction;
In the branch pipe provided in the middle trunk pipe, the main direction defined by the center of the injection angle of the injection unit that injects liquid to the exhaust gas inlet is 0 degree or more with respect to the exhaust gas introduction direction. The exhaust gas treatment apparatus according to claim 5, wherein the exhaust gas treatment apparatus is 180 degrees or less.
At least one branch pipe provided in the upper trunk pipe is located at the same height as the exhaust gas inlet in the height direction;
In the branch pipe provided in the upper trunk pipe, the main direction defined by the center of the injection angle of the injection unit for injecting liquid to the exhaust gas introduction port is 0 degree or more with respect to the exhaust gas introduction direction. The exhaust gas treatment apparatus according to claim 5 or 6, which is 180 degrees or less.
The branch pipe located closest to the bottom side among the plurality of branch pipes is located on the upper side of an intermediate position between the bottom side and the upper side of the exhaust gas inlet. The exhaust gas treatment apparatus according to one item.
The exhaust gas treatment apparatus according to claim 8, wherein the main direction of the injection unit in at least one branch pipe located on the bottom side among the plurality of branch pipes is inclined toward the upper side.
The exhaust gas treatment apparatus according to claim 8 or 9, wherein the main direction of the injection unit in at least one branch pipe located on the upper side among the plurality of branch pipes is inclined toward the bottom side.
The exhaust gas treatment apparatus according to any one of claims 1 to 10, wherein the reaction tower has a flange on the uppermost side of the exhaust gas inlet.
The flange extends in the exhaust gas introduction direction,
The exhaust gas treatment apparatus according to claim 11, wherein when viewed from above, at least a part of the flange portion overlaps a branch tube located on an upper side of the flange portion among the plurality of branch tubes.
The flange has an outer peripheral region provided in contact with the inner wall of the reaction tower,
The exhaust gas treatment device according to claim 11 or 12, wherein the height in the height direction of the outer peripheral region increases as it proceeds from an inner end portion to an outer end portion of the exhaust gas introduction port.
An exhaust gas inlet pipe connected to the exhaust gas inlet from the outside of the reaction tower;
The exhaust gas introduction pipe is
An outer side surface extending in a tangential direction of the outer shape of the reaction tower;
An inner side surface provided facing the outer side surface and extending in a direction intersecting the outer shape of the reaction tower;
The exhaust gas treatment apparatus according to any one of claims 1 to 13, wherein the inner side surface does not protrude into the internal space of the reaction tower.
The exhaust gas introduction pipe is
A first straight portion extending in the height direction;
The exhaust gas treatment apparatus according to claim 14, further comprising a straight line portion orthogonal to the height direction and having a second straight line portion provided between the first straight line portion and the exhaust gas inlet in the exhaust gas flow path.