Liquid seal type dust collector

Abstract

An object of the present disclosure is to provide a liquid seal type dust collection device capable of efficiently guiding exhaust gas discharged from a discharge port.SOLUTION: The liquid seal type dust collector 10 of the present disclosure includes the exhaust duct 5 that guides the exhaust gas G from the mover 90, the liquid chamber 2 that holds the liquid L in which the liquid seal section 52 provided in the exhaust duct 5 is immersed, the gas chamber 3 that collects and discharges the exhaust gas G from the discharge port 54 of the exhaust duct 5, and the guide section 6 that guides the exhaust gas G from the discharge port 54 to the gas chamber 3 side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a liquid ring dust collector for a coke oven. [Background technology]

[0002] A treatment device is known that treats exhaust gas containing dust from a moving machine moving in a predetermined direction in a coke oven. The applicant has disclosed in Patent Document 1 a treatment device equipped with a liquid-sealed connecting duct for treating exhaust gas from the moving machine. This device comprises an on-machine duct that discharges exhaust gas from the moving machine moving in a predetermined direction, a liquid-filled chamber that immerses the liquid-sealed portion at the tip of the on-machine duct, and an air chamber that has a means for sucking exhaust gas from the outlet of the on-machine duct. The on-machine duct moves within the liquid-filled chamber in conjunction with the movement of the moving machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-131603 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors have recognized the following regarding liquid-ring dust collectors. In liquid-ring dust collectors, some of the dust contained in the exhaust gas discharged from the discharge port of the on-board duct accumulates in the liquid-filled chamber. If the dust deposits accumulated in the liquid-filled chamber come into contact with the liquid-sealed section, they will hinder the movement of the mobile machine. From this, the inventors have recognized that it is important to efficiently guide the exhaust gas discharged from the discharge port. From this perspective, there is room for improvement in the device described in Patent Document 1.

[0005] The present invention has been made in view of the above problems, and one of its objects is to provide a liquid ring dust collector that can efficiently guide exhaust gas discharged from a discharge port. [Means for solving the problem]

[0006] In order to solve the above problems, one embodiment of the liquid-sealed dust collector of the present invention comprises an exhaust duct that draws out exhaust gas from a mobile machine, a liquid chamber that holds a liquid that immerses a liquid seal provided in the exhaust duct, a gas chamber that collects and discharges exhaust gas from the exhaust duct's outlet, and a guide section that guides the exhaust gas from the outlet toward the gas chamber.

[0007] Any combination of the above components, or mutual substitution of the components or expressions of the present invention between methods, systems, etc., are also valid aspects of the present invention. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a liquid ring dust collector that can efficiently guide exhaust gas discharged from a discharge port. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a plan view schematically showing a liquid-sealed dust collecting device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view schematically showing the liquid ring dust collector of FIG. 1. [Figure 3] FIG. 3 is an enlarged view of the guide portion of FIG. 2. [Figure 4] 3 is a diagram showing the relationship between the inclination angle of the inclined surface of the guide portion in FIG. 2 and the amount of accumulated dust.

[0010] First, we will explain how we arrived at this disclosure. In a liquid-ring dust collector, a portion of the dust contained in the exhaust gas discharged from the discharge port of the on-board duct accumulates in the liquid-filled chamber. It was discovered that if an excessive amount of dust accumulates in the liquid-filled chamber, the liquid-ring part moving through the liquid-filled chamber may come into contact with the dust deposit. If the liquid-ring part comes into contact with the dust deposit, it can hinder the movement of the moving machine. Based on these findings, the inventors came up with the idea of ​​providing a guide part that guides the exhaust gas from the discharge port toward the gas chamber. Below, we will explain the liquid-ring dust collector of the present disclosure that includes a guide part.

[0011] The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modifications, identical or equivalent components and members are designated by the same reference numerals, and redundant explanations will be omitted where appropriate. The dimensions of the members in the drawings are enlarged or reduced as appropriate to facilitate understanding. Some members that are not important for explaining the embodiments will be omitted from the drawings.

[0012] Furthermore, terms including ordinal numbers such as first and second are used to describe various components, but these terms are used only to distinguish one component from another and do not limit the components.

[0013] [Embodiment] The overall configuration of a liquid-sealed dust collector 10 (hereinafter sometimes referred to as "dust collector 10") according to an embodiment of the present invention will be described below with reference to Figures 1, 2, and 3. Figure 1 is a plan view that schematically shows a dust collection system 100 that includes the dust collector 10 according to the embodiment. In this figure, a portion of a top plate 21, which will be described later, is shown cut away. Figure 2 is a cross-sectional view that schematically shows the dust collector 10.

[0014] The following description will be primarily based on an XYZ Cartesian coordinate system. For convenience, the X direction will be referred to as the front-to-back direction, the Y direction as the left-to-right direction, and the Z direction as the up-to-down direction. The Y and Z directions are each perpendicular to the X direction. In FIG. 1 , the X direction corresponds to the left-to-right direction on the paper, the Y direction corresponds to the up-to-down direction on the paper, and the Z direction corresponds to the direction perpendicular to the paper. The base end of the arrow in the X direction may be referred to as the "front" or "forward," and the tip end thereof may be referred to as the "rear" or "rearward." The base end of the arrow in the Y direction may be referred to as the "right" or "rightward," and the tip end thereof may be referred to as the "left" or "leftward." These directional notations do not limit the orientation of the dust collecting device 10, and the dust collecting device 10 may be used in any orientation depending on the application.

[0015] The dust collection system 100 is equipment that collects and processes dust released from the opening of the carbonization chamber 96 of the coke oven 94 extending in the X direction, together with the surrounding air, and includes a dust collector 10 and a processing facility 80. The dust collector 10 and the processing facility 80 are sometimes collectively referred to as ground-side equipment. The dust collector 10 sends out exhaust gas G containing dust, which is drawn out from a moving machine 90 that moves left and right near the coke oven 94 while being guided by a rail 91, to the ground-based processing facility 80 while being shielded from the outside air. The processing facility 80 performs a predetermined process on the exhaust gas G from the dust collector 10.

[0016] The dust collector 10 of this embodiment mainly comprises an exhaust duct 5 and a dust collector main body 11. The dust collector main body 11 has a liquid chamber 2 and a gas chamber 3 and is stationary installed on the ground. The dust collector main body 11 has a longitudinal direction parallel to the coke oven 94 in the left-right direction. The liquid chamber 2 and the gas chamber 3 of the dust collector main body 11 have lengths approximately equal to the movement range of the moving machine 90. The liquid chamber 2 holds liquid L for immersing the liquid seal portion 52 provided in the exhaust duct 5. The type of liquid L is not limited, but in this embodiment, it is water. A hanging plate 27 enters the liquid L held in the liquid chamber 2 from above. The liquid chamber 2 has an outlet-side space 29 above the liquid surface of the liquid L behind the hanging plate 27. The gas chamber 3 has a space communicating with the outlet-side space 29 and collects exhaust gas G from the discharge port 54 of the exhaust duct 5 and sends it to the treatment facility 80. The outlet 54 is provided with a guide portion 6. The guide portion 6 will be described later.

[0017] The exhaust duct 5 is a duct that guides the exhaust gas G from the movable unit 90 and sends it to the dust collector main body 11, and moves left and right integrally with the movable unit 90. The exhaust duct 5 has a delivery duct 51 on the movable unit 90 side and a liquid seal portion 52 formed at the tip of the delivery duct 51. The delivery duct 51 is configured so that its left-right dimension above the liquid seal portion 52 is larger than its front-to-rear dimension in order to ensure air volume while miniaturizing the ground-side equipment. In FIG. 1, the portion of the liquid seal portion 52 that is submerged in liquid is indicated by a dashed line. The liquid seal portion 52 moves left and right within the liquid chamber 2. An outlet port 54 that discharges the exhaust gas G is provided at the tip of the liquid seal portion 52. The outlet port 54 opens into the outlet-side space 29 at a position above the liquid L. As an example, the outlet port 54 in this embodiment has a substantially rectangular (including square) shape when viewed from above.

[0018] The dust collection device main body 11 has a top plate 21, a front wall 22, a rear wall 23, two side walls 24, bottoms 25 and 26, a hanging plate 27, and a partition plate 28 (hereinafter, when these are collectively referred to as the partition structure) to define the liquid chamber 2 and the gas chamber 3.

[0019] The front wall 22 and the rear wall 23 are erected walls extending laterally, with the front wall 22 located in front of the rear wall 23, i.e., closer to the movable device 90. The two side walls 24 are erected walls extending longitudinally and connect the front wall 22 and the rear wall 23. The bottoms 25, 26 are horizontal structures whose front edge is connected to the lower edge of the front wall 22, whose rear edge is connected to the lower edge of the rear wall 23, and whose left and right side edges are connected to the lower edges of the two side walls 24. The bottoms 25, 26 include the bottom 25 that forms the bottom of the liquid chamber 2 and the bottom 26 that forms the bottom of the gas chamber 3. In this example, the bottoms 25, 26 extend horizontally as a single unit.

[0020] The rear edge of top plate 21 is connected to the upper edge of rear wall 23, and the left and right edges are connected to the upper edges of the two side walls 24. Top plate 21 extends in the front-to-rear direction from the upper edge of rear wall 23 toward front wall 22 over the entire length of rear wall 23. Hanging plate 27 extends downward from the front edge of top plate 21 over the entire length of top plate 21. Hanging plate 27 in this embodiment extends downward at a position that divides the front-to-rear dimension of liquid chamber 2 into approximately two equal parts, and has a vertical dimension that does not contact bottom portions 25, 26. As a result, a first gap 32 is formed between the lower edge of hanging plate 27 and the upper surface of bottom portion 25, through which liquid L can flow. First gap 32 extends over the entire length of liquid chamber 2 in the left-to-right direction.

[0021] Partition plate 28 extends upward from bottom portions 25, 26 and also extends in the left-right direction, with its left and right edges connected to two side walls 24, respectively. Partition plate 28 is spaced a predetermined distance rearward from hanging plate 27 and located in front of rear wall 23. In this embodiment, partition plate 28 is disposed at a position that divides the front-to-rear dimension of dust collecting device main body 11 into approximately two equal parts. A second gap 33, through which exhaust gas G flows, is formed between the upper edge of partition plate 28 and the underside of top plate 21. Second gap 33 extends across the entire liquid chamber 2 in the left-to-right direction.

[0022] Liquid chamber 2 is a substantially rectangular parallelepiped space partitioned by bottom 25, front wall 22, two side walls 24, and partition plate 28. Liquid chamber 2 holds liquid L that immerses liquid seal portion 52 provided in exhaust duct 5. Note that liquid seal portion 52 does not refer to a specific location, but rather to the portion of exhaust duct 5 that is contained in liquid chamber 2. Hanging plate 27 enters the area that holds liquid L from above. Liquid seal portion 52 is U-shaped, folding back at the front and rear of hanging plate 27. Liquid seal portion 52 has a portion that extends downward toward the downstream side in front of hanging plate 27 and a portion that extends upward toward the downstream side behind hanging plate 27. When exhaust duct 5 moves in conjunction with movable machine 90, exhaust duct 5 is configured not to come into contact with the partition structure of dust collector 10.

[0023] The level of liquid L is maintained at a position lower than the upper edges of front wall 22, two side walls 24, and partition plate 28. For this reason, it is desirable to adjust the amount of liquid L as appropriate. The level of liquid L between hanging plate 27 and partition plate 28 is made higher than the level of liquid L between hanging plate 27 and front wall 22 by the negative pressure supplied to gas chamber 3. The level of liquid L between hanging plate 27 and partition plate 28 is maintained at a position lower than the upper edge of partition plate 28. The level of liquid L between hanging plate 27 and front wall 22 is maintained at a position lower than the upper edge of front wall 22, and in this example, is exposed to the outside air.

[0024] The gas chamber 3 is a substantially rectangular parallelepiped space partitioned by a top plate 21, a bottom 26, two side walls 24, a rear wall 23, and a partition plate 28. The gas chamber 3 is sometimes referred to as a dust accumulation chamber for accumulating dust. An extraction duct 34 for extracting the exhaust gas G is provided in a partition structure (in this example, the rear wall 23) surrounding the gas chamber 3. The extraction duct 34 is connected to a treatment facility 80 having a negative pressure means (not shown) for sucking the exhaust gas G from the gas chamber 3. The negative pressure means may be, for example, a suction blower. The exhaust gas G generated by the moving machine 90 flows into the treatment facility 80 through the exhaust duct 5, the gas chamber 3, and the extraction duct 34 by the negative pressure means of the treatment facility 80.

[0025] The mover 90 will be described. The mover 90 may be any machine that moves near the coke oven 94 and receives dust released from the carbonization chamber 96. The mover 90 in this embodiment is an extruder 92 that moves left and right near the coke oven 94 while being guided by a rail 91, and pushes out the coke after carbonization from the carbonization chamber 96. The extruder 92 can also level the coal in the carbonization chamber 96. When the extruder 92 pushes out the coke and levels the coal, it releases an exhaust gas G containing dust from the carbonization chamber 96.

[0026] An exhaust duct 5 is attached to the extruder 92. An opening on the base end side of the exhaust duct 5 sucks in the exhaust gas G released from the carbonization chamber 96. The sucked exhaust gas G is sent to the gas chamber 3 of the dust collector main body 11 via the exhaust duct 5, and then sent from the gas chamber 3 to the processing equipment 80 for predetermined processing. As an example, the processing equipment 80 uses a bag filter or the like to remove dust from the exhaust gas G, and discharges clean air to the outside. In addition, some of the dust accumulates at the bottom 26 of the gas chamber 3.

[0027] In the dust collecting device 10 of the embodiment, the liquid seal portion 52 is sealed off from the outside air by the liquid L, and the gas chamber 3 is sealed off from the outside air by the partition structure, so that leakage of the exhaust gas G to the outside can be almost completely prevented.

[0028] The guide unit 6 of the present disclosure will be described with reference to Figures 2, 3, and 4. Figure 3(A) is an enlarged view of the guide unit 6, and Figure 3(B) is a view seen from the direction of an arrow C. When exhaust gas G discharged from the discharge port 54 accumulates near the discharge port 54, the amount of dust contained in the exhaust gas G that accumulates in the liquid chamber 2 increases. Since removing dust that accumulates in the liquid L requires a lot of effort, it is desirable that the amount of accumulation be small. Therefore, the dust collecting device 10 of the embodiment includes a guide unit 6 that guides the exhaust gas G from the discharge port 54 toward the gas chamber 3, as shown in Figure 2.

[0029] The configuration of the guide portion 6 is not limited as long as it can guide the exhaust gas G toward the gas chamber 3. For example, the guide portion 6 may be configured to change the direction of the exhaust gas G flowing above the discharge port 54 to the rear. Therefore, in this embodiment, as shown in FIG. 3, the guide portion 6 has an inclined surface 63 that faces the discharge port 54 and is inclined obliquely upward from a base end 61 on the liquid chamber side on the discharge port 54 side to a tip end 62 on the gas chamber 3 side. In this case, it is expected that the direction of the exhaust gas G will change rearward along the inclination of the inclined surface 63.

[0030] The guide portion 6 is a plate-shaped member that overlaps the discharge port 54 in a top view. The inclined surface 63 is provided on the side of the guide portion 6 facing the discharge port 54. The size of the inclined surface 63 is not limited. If the inclined surface 63 is too large, it may obstruct the flow of the exhaust gas G, while if the inclined surface 63 is too small, its guide function will be reduced. From this perspective, the front-to-rear length D2 of the inclined surface 63 can be set in the range of 10% to 90% of the front-to-rear length D1 of the discharge port 54. Within this range, the flow of the exhaust gas G is hardly obstructed and a significant guide function is obtained. More preferably, the front-to-rear length D2 of the inclined surface 63 can be set in the range of 10% to 30% of the front-to-rear length D1 of the discharge port 54, and in this embodiment, it is set to 13%. Specifically, the front-to-rear length D1 of the discharge port 54 is 300 mm, and the front-to-rear length D2 of the inclined surface 63 is set to 39 mm. The front-to-rear lengths D1 and D2 of the inclined surface 63 and the discharge port 54 refer to the front-to-rear dimensions when projected onto a horizontal plane, and the dimension of the inclined surface 63 in the extension direction is 155 mm.

[0031] The left-right dimension W2 of the inclined surface 63 can be set to be 10 to 40 times, more preferably 20 to 30 times, the left-right dimension W1 of the discharge port 54. In the embodiment, the left-right dimension W2 of the inclined surface 63 is 8000 mm, the left-right dimension W1 of the discharge port 54 is also 8000 mm, and the left-right dimension W2 is set to be 100% of the left-right dimension W1.

[0032] FIG. 4 is a diagram showing the relationship between the inclination angle θ of the inclined surface 63 of the guide portion 6 with respect to the horizontal plane and the amount of dust accumulation T. In this diagram, the horizontal axis represents the inclination angle θ, and the vertical axis represents the amount of dust accumulation T accumulated in the liquid L in the liquid chamber 2. This diagram shows data on the amount of accumulation T when air containing dust particles with a particle diameter of 100 μm at a dust concentration of 0.1 g / m is flowed at an air volume of 2,670 m / min, and the amount of accumulation T without the guide portion 6 is shown as 100%. The relationship between the inclination angle θ and the amount of accumulation T shows the same tendency as in FIG. 4 even when conditions such as particle diameter, dust concentration, and air volume are changed.

[0033] If the inclination angle θ of the inclined surface 63 is too small, it may hinder the flow of the exhaust gas G, and if the inclination angle θ is too large, the guide function of the inclined surface 63 will be reduced. From this perspective, the inclination angle θ of the inclined surface 63 with respect to the horizontal plane can be set to be equal to or greater than 65° and equal to or less than 85°. As shown in FIG. 4, within this range, the amount of dust accumulation T can be significantly reduced compared to when the guide portion 6 is not provided. In this embodiment, the inclination angle θ of the inclined surface 63 with respect to the horizontal plane is set to be equal to or greater than 75° and equal to or less than 85°.

[0034] If the upper edge 282 of the partition plate 28 is positioned too low, it is possible that the liquid L in the liquid chamber 2 will overflow the upper edge 282 and spill over into the gas chamber 3. If the liquid L spills over into the gas chamber 3 and mixes with dust accumulated in the gas chamber 3, it will become muddy and require a lot of effort to remove. Therefore, in this embodiment, the partition plate 28 is disposed between the discharge port 54 and the gas chamber 3, and the upper edge 282 of the partition plate 28 is disposed at a higher position than the upper edge 632 of the inclined surface 63. In this example, the upper edge 632 is disposed at the tip 62. The height difference H1 between the upper edge 282 of the partition plate 28 and the upper edge 632 of the inclined surface 63 may be 100 mm or more, and in this embodiment, the height difference H1 is 120 mm.

[0035] It is not preferable that the support structure of the guide portion 6 be complicated. Furthermore, if the base end 61 of the inclined surface 63 is separated from the discharge port 54, the exhaust gas G may flow forward through the gap, which may reduce the guide function of the inclined surface 63. Therefore, in this embodiment, the base end 61 of the inclined surface 63 is connected to the discharge port 54. In this case, the guide function of the inclined surface 63 can be maintained well with a simple configuration.

[0036] Vibrations of the guide part 6 during movement may place a large stress on the joint between the guide part 6 and the discharge port 54. Therefore, in this embodiment, at least one end of the guide part 6 in the direction in which the liquid chamber extends has a support member 64 that is connected to the inclined surface 63 and the discharge port 54. For example, the support member 64 is connected to the intermediate portion between the base end 61 and the tip end 62 of the guide part 6 and the discharge port 54. The support member 64 in this example is a plate-shaped member that is approximately triangular when viewed from the left and right.

[0037] The guide portion 6 may be formed by bending a plate material that is integral with the member that constitutes the tip of the exhaust duct 5, or may be formed as a separate piece and then joined to the discharge port 54 by welding or the like. The guide portion 6 in this example is formed as a separate piece and then joined to the discharge port 54 by welding or the like. The support member 64 may be formed by bending a plate material that is integral with the guide portion 6, or may be formed as a separate piece and then joined to the guide portion 6 by welding or the like. The support member 64 in this example is formed as a separate piece and then joined to the guide portion 6 by welding or the like.

[0038] The features of the liquid ring dust collector 10 configured as above will be described. The liquid ring dust collector 10 of the embodiment includes an exhaust duct 5 that draws out exhaust gas G from the movable machine 90, a liquid chamber 2 that holds liquid L that immerses a liquid seal portion 52 provided in the exhaust duct 5, a gas chamber 3 that collects and discharges exhaust gas G from a discharge port 54 of the exhaust duct 5, and a guide portion 6 that guides exhaust gas G from the discharge port 54 toward the gas chamber 3.

[0039] This configuration reduces the amount of exhaust gas G discharged from the discharge port 54 that remains near the discharge port 54, and allows the exhaust gas G to be efficiently guided into the gas chamber 3. As a result, the amount of exhaust gas G that remains can be reduced, and the accumulation of dust contained in the exhaust gas G in the liquid chamber 2 can be reduced.

[0040] As an example, the guide portion 6 has an inclined surface 63 that faces the discharge port 54 and is inclined obliquely upward from a base end 61 on the liquid chamber side of the discharge port 54 side to a tip end 62 on the gas chamber 3 side. In this case, the discharge gas G moves obliquely upward along the inclination of the inclined surface 63, so that the discharge gas G is less likely to accumulate above the discharge port 54 and moves efficiently toward the gas chamber 3 side.

[0041] As an example, the inclination angle θ of the inclined surface 63 relative to the horizontal plane is 65° or more and 85° or less. In this case, by setting the inclination angle θ in the range of 65° or more and 85° or less, accumulation of dust contained in the exhaust gas G in the liquid chamber 2 can be suppressed.

[0042] As an example, a partition plate 28 is disposed between the discharge port 54 and the gas chamber 3, and an upper edge 282 of the partition plate 28 is positioned higher than an upper edge 632 of the inclined surface 63. In this case, the amount of liquid L in the liquid chamber 2 that overflows the upper edge 282 of the partition plate 28 and into the gas chamber 3 can be reduced.

[0043] As an example, the base end 61 of the guide portion 6 is connected to the discharge port 54. In this case, the guide portion 6 moves integrally with the exhaust duct 5, making the structure simpler than when the guide portion 6 is fixed to something else.

[0044] As an example, at least one end of the guide portion 6 in the direction in which the liquid chamber extends has a support member 64 that is connected to the inclined surface 63 and the discharge port 54. In this case, the guide portion 6 can be firmly fixed to the discharge port 54. Furthermore, the diffusion of the exhaust gas G in the left and right directions near the discharge port 54 can be reduced, and the exhaust gas G can be more efficiently guided to the gas chamber 3.

[0045] The above describes in detail exemplary embodiments of the present invention. Each of the above-described embodiments merely illustrates a specific example of how the present invention may be implemented. The content of the embodiments does not limit the technical scope of the present invention, and many design modifications, such as changes, additions, and deletions of components, are possible within the scope of the inventive concept defined in the claims. In each of the above-described embodiments, content that allows such design modifications is described using notations such as "in the embodiment" or "in the embodiment," but this does not mean that design modifications are not permitted in content that does not have such notations. Furthermore, hatching on cross sections in the drawings does not limit the material of the hatched object.

[0046] (Variation) The following describes modified examples. In the drawings and descriptions of the modified examples, the same or equivalent components and members as those in the embodiment are denoted by the same reference numerals. Explanations that overlap with the embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the embodiment.

[0047] In the above description, an example in which the inclined surface 63 is flat has been shown, but the present invention is not limited to this. The inclined surface may be inclined obliquely upward as a whole, and may include non-flat portions such as curves, bends, or irregularities.

[0048] In the above description, an example has been shown in which the outlet 54 of the exhaust duct 5 is an opening along a horizontal plane, but this is not limiting. For example, the outlet of the exhaust duct may be an opening along a plane that is inclined relative to the horizontal plane (an oblique opening).

[0049] In the above description, an example was shown in which the upper edge 282 of the partition plate 28 is positioned higher than the upper edge 632 of the inclined surface 63, but this is not limiting. As long as the amount of liquid spilling into the gas chamber satisfies the desired condition, the height of the upper edge of the partition plate may be equal to or lower than the height of the upper edge of the inclined surface.

[0050] In the above description, an example in which a single extraction duct 34 is provided on the rear wall 23 has been described, but this is not limiting. For example, a plurality of extraction ducts may be provided, or extraction ducts may be provided on the side walls, the top plate, etc.

[0051] In the above description, the guide portion 6 is an example of a rectangular plate member whose lateral dimension is constant from the base end to the tip, but is not limited to this. For example, the guide portion may be a trapezoidal member whose lateral dimension gradually increases or decreases from the base end to the tip, or may have some other shape.

[0052] In the above description, an example in which a single guide portion 6 is provided has been shown, but this is not limiting. For example, a plurality of guide portions may be provided. In this case, the plurality of guide portions may be provided separately from each other, may be connected to each other, or may have different shapes.

[0053] In the above description, an example was given in which the moving machine 90 was the pusher 92, but the present invention is not limited to this. For example, the moving machine may be a guide car, a coal loading car, or the like.

[0054] Each of the above-described modifications provides the same functions and effects as the embodiment.

[0055] Any combination of the components and modifications of the above-described embodiments is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the combined effects of the combined embodiments and modifications. [Explanation of symbols]

[0056] 2 liquid chamber, 3 gas chamber, 5 exhaust duct, 6 guide section, 10 liquid ring dust collector, 28 partition plate, 34 extraction duct, 52 liquid ring section, 54 discharge port, 61 base end, 62 tip end, 63 inclined surface, 64 support member, 90 moving machine.

Claims

1. an exhaust duct for discharging exhaust gas from the mobile device; a liquid chamber for holding a liquid in which a liquid seal portion provided in the exhaust duct is immersed; a gas chamber that collects and discharges exhaust gas from the outlet of the exhaust duct; a guide portion that guides the exhaust gas from the discharge port toward the gas chamber; A liquid-sealed dust collector equipped with:

2. 2. The liquid-sealed dust collector according to claim 1, wherein the guide portion has an inclined surface that faces the discharge port and is inclined obliquely upward from a base end on the liquid chamber side on the discharge port side to a tip end on the gas chamber side.

3. 3. The liquid ring dust collector according to claim 2, wherein an angle of inclination of the inclined surface relative to a horizontal plane is 65 degrees or more and 85 degrees or less.

4. 3. The liquid-sealed dust collector according to claim 2, further comprising a partition plate disposed between the discharge port and the gas chamber, the upper edge of the partition plate being positioned higher than the upper edge of the inclined surface.

5. The liquid-sealed dust collector according to claim 2 , wherein a base end of the guide portion is connected to the discharge port.

6. 6. The liquid ring dust collector according to claim 5, wherein at least one end of said guide portion in the direction in which said liquid chamber extends is provided with a support member connected to said inclined surface and said discharge port.

Images