Liquid seal type dust collector

Abstract

An object of the present disclosure is to provide a liquid-sealed dust collector capable of suppressing excessive accumulation of dust discharged from a mover.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 exhaust duct 5, and the discharge mechanism 6 that discharges the deposit accumulated in at least one of the liquid chamber 2 and the gas chamber 3.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 present inventors have recognized the following regarding liquid-ring dust collectors. In a liquid-ring dust collector, 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, and other dust accumulates in the air chamber. If the dust deposits accumulated in the liquid-filled chamber come into contact with the liquid seal, they will hinder the movement of the mobile machine. If the dust deposits accumulated in the air chamber come into contact with the filling liquid scattered from the liquid-filled chamber, they will turn into a muddy substance, making them difficult to collect. From these facts, the inventors have recognized that it is important to prevent excessive accumulation of dust discharged from the mobile machine. 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-sealed dust collector that can suppress excessive accumulation of dust discharged from a mobile machine. [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 outlet, the liquid chamber, and a discharge mechanism that discharges deposits that have accumulated in at least one of the gas chambers.

[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-sealed dust collector that can suppress excessive accumulation of dust discharged from a mobile machine. [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] 1 is a cross-sectional view schematically showing a liquid ring dust collecting device according to an embodiment. [Figure 3] 1 is a block diagram showing a liquid-sealed dust collecting device according to an embodiment; [Figure 4] 3 is a diagram schematically showing a first discharge section and a second discharge section of a discharge mechanism of the liquid ring dust collector of the embodiment. FIG. [Figure 5] 3 is a diagram schematically illustrating an automatic opening and closing mechanism of the liquid ring dust collector of the embodiment. FIG.

[0010] First, we will explain how this disclosure came about. The dust collector body installed next to a coke oven is long and large, and some of the dust accumulates in the liquid chamber along the way. As the dust accumulates in the liquid chamber, it comes into contact with the liquid seal, hindering the lateral movement of the moving machine. Furthermore, when the moving machine moves laterally, the liquid in the liquid chamber may ripple, overflowing the partition between the liquid chamber and the gas chamber and accumulating in the gas chamber. Such liquid pools are likely to occur near the longitudinal ends of the gas chamber. When liquid accumulates in the gas chamber where dust has accumulated, the dust accumulated in the gas chamber becomes wet over a wide area and turns into a muddy (slurry) state, making it difficult to collect the dust accumulated in the gas chamber. Furthermore, the coating on the gas chamber may be less waterproof than the liquid chamber, and liquid accumulation in the gas chamber may cause corrosion of the gas chamber. Based on these considerations, the inventors came up with the idea of ​​providing a discharge mechanism that can easily discharge deposits accumulated in the liquid chamber and gas chamber. The liquid ring dust collecting device of the present disclosure equipped with a discharge mechanism will be described below.

[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 Figs. 1 and 2. Fig. 1 is a plan view schematically showing a dust collection system 100 including 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. Fig. 2 is a cross-sectional view schematically showing the dust collector 10. Fig. 3 is a block diagram showing 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 dust collecting device main body 11 is provided with a discharge mechanism 6 for discharging accumulated deposits. The discharge mechanism 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 discharge mechanism 6 will be described with reference to Figures 2, 3, 4, and 5. The discharge mechanism 6 of this embodiment mainly includes an information processing unit 4, a first discharge unit 61, a second discharge unit 71, a liquid supply unit 63, a first liquid level sensor 64, and a second liquid level sensor 68. Figure 3 is a block diagram showing the dust collecting device 10. Figure 4 is a diagram schematically showing an example of the arrangement of the first discharge unit 61 and the second discharge unit 71 of the discharge mechanism 6.

[0029] As the exhaust gas G from the discharge port 54 of the exhaust duct 5 moves from the outlet space 29 of the liquid chamber 2 to the partition plate 28, some of the dust contained in the exhaust gas G falls into the liquid L and accumulates on the bottom 25 of the liquid chamber 2. The dust accumulated on the bottom 25 is called deposit S. As mentioned above, if too much deposit S accumulates, it will come into contact with the liquid seal part 52 and may interfere with the movement of the movable machine 90.

[0030] Therefore, the discharge mechanism 6 of the embodiment includes a first discharge portion 61 that has an open state in which the sediment S in the liquid chamber 2 can be discharged, and a closed state in which the discharge of the sediment S is prevented. The first discharge portion 61 may be provided anywhere as long as it is capable of discharging the sediment S in the liquid chamber 2, but the first discharge portion 61 of the embodiment is provided on the bottom 25 of the liquid chamber 2. There is no limit to the number of first discharge portions 61, but in the example of Figure 4, multiple first discharge portions 61 are provided at predetermined intervals in the longitudinal direction (left-right direction) of the liquid chamber 2.

[0031] The multiple first discharge portions 61 may be arranged at equal intervals or at unequal intervals. Of the multiple first discharge portions 61, the first discharge portions 61 arranged at the left and right ends are referred to as specific first discharge portions 61A. The area around the specific first discharge portion 61A is more likely to accumulate deposits S than the areas around the other first discharge portions 61. For this reason, the discharge frequency of the specific first discharge portion 61A for discharging deposits S may be set higher than the discharge frequency of the other first discharge portions 61.

[0032] The position of the first discharge portion 61 in the front-to-rear direction is not limited, and may be disposed, for example, in the center of the front-to-rear direction of the liquid chamber 2. Since sediment S is more likely to accumulate on the rear side of the center of the front-to-rear direction of the liquid chamber 2 than on the front side of the center of the front-to-rear direction, in the example of FIG. 4, the first discharge portion 61 is disposed on the rear side of the center of the front-to-rear direction of the liquid chamber 2. For example, in the front-to-rear direction, the first discharge portion 61 may be disposed between the hanging plate 27 and the partition plate 28. The multiple first discharge portions 61 may be disposed in a single row extending left and right, or in multiple rows.

[0033] The configuration of the first discharge unit 61 is not limited as long as it is possible to discharge and stop the discharge of the deposit S. In the embodiment, the first discharge unit 61 has a valve mechanism that can be opened and closed. From the viewpoint of not increasing the number of operational steps, it is desirable that the first discharge unit 61 be remotely controllable. Therefore, in the embodiment, the valve mechanism of the first discharge unit 61 is a first solenoid valve 62. Here, the solenoid valve includes not only a solenoid valve in the narrow sense but also any valve mechanism that opens and closes depending on the supply state of electrical energy. The open / close state of the first solenoid valve 62 in the embodiment is controlled in accordance with control by the information processing unit 4. The valve mechanism of the first discharge unit 61 is not limited to a solenoid valve, and may have an automatic opening / closing mechanism that opens and closes automatically based on a non-electromagnetic principle, or may be a manual valve configured to be manually opened and closed by an operator.

[0034] If the first discharge part 61 were to be used to discharge only the deposit S without discharging the liquid L, the configuration of the valve mechanism would become complicated. Therefore, in this embodiment, when the first discharge part 61 is in the open state, it can discharge the deposit S together with the liquid L from the liquid chamber 2. Discharging the deposit S together with the liquid L promotes the flow of the deposit S, allowing it to be discharged smoothly and improving discharge efficiency.

[0035] If too much liquid L is discharged, the liquid level in the liquid chamber 2 will drop, reducing the liquid seal effect and potentially causing leakage of the exhaust gas G. Therefore, the liquid ring dust collector 10 of this embodiment further includes a liquid supply unit 63 that supplies liquid L to the liquid chamber 2 when the amount of liquid L in the liquid chamber 2 is equal to or less than a first threshold value. The liquid supply unit 63 is a valve mechanism that can supply liquid from an external liquid supply means to the liquid chamber 2. While the liquid supply unit 63 may be a manual valve, the liquid supply unit 63 in this example is a solenoid valve whose open / close state is controlled in accordance with the control of the information processing unit 4.

[0036] In this embodiment, the liquid supply unit 63 supplies liquid L to the liquid chamber 2 when the amount of liquid L in the liquid chamber 2 is equal to or less than a first threshold. The first level sensor 64 is provided in the liquid chamber 2 and detects the liquid level of the liquid L corresponding to the amount of liquid L in the liquid chamber 2, providing the detection result to the information processing unit 4. Based on the detection result of the first level sensor 64, the information processing unit 4 controls the liquid supply unit 63 to open and supply liquid L to the liquid chamber 2 when the amount of liquid L in the liquid chamber 2 is equal to or less than the first threshold. The configuration of the first level sensor 64 is not limited, and any liquid level detection means based on known principles can be used. The first threshold can be set by experiment or simulation so that the liquid sealing effect of the liquid chamber 2 can be maintained at a desired level. When the amount of liquid L in the liquid chamber 2 reaches a predetermined level, the information processing unit 4 controls the liquid supply unit 63 to close and stop the supply of liquid to the liquid chamber 2.

[0037] In this embodiment, the liquid level of the liquid L in the liquid chamber 2 on the front side (front wall side) of the hanging plate 27 is open at the top, and the amount of liquid L in the liquid chamber 2 increases due to rainfall. If the amount of liquid L in the liquid chamber 2 becomes excessive due to the supply of liquid L or rainfall, the liquid level of the liquid L rises, and there is a risk that the liquid L will overflow the upper edge of the partition plate 28 and spill into the gas chamber 3. If the liquid L accumulates in the gas chamber 3, the accumulation portion P of the gas chamber 3 will become wet and muddy, making it difficult to recover.

[0038] Therefore, the liquid ring dust collector 10 of the embodiment discharges the liquid L from the liquid chamber 2 through the first discharge portion 61 when the amount of liquid L in the liquid chamber 2 exceeds a second threshold. Based on the detection result of the first liquid level sensor 64, the information processing unit 4 controls the first discharge portion 61 to open and discharge the liquid L from the liquid chamber 2 when the amount of liquid L in the liquid chamber 2 exceeds the second threshold. The second threshold can be set by experiment or simulation so that the amount of liquid L leaking into the gas chamber 3 can be kept below a desired level. In the embodiment, the second threshold is set to be greater than the first threshold.

[0039] In this embodiment, a drainage passage 67 is provided below the dust collecting device main body 11. The drainage passage 67 is a recess for guiding the liquid L discharged from the first discharge part 61 to a liquid storage means (not shown), and may be, for example, a pit. The liquid L discharged from the first discharge part 61 flows through the drainage passage 67 and is stored in the liquid storage means, and is then pumped out by a pump (not shown) and sent to a downstream treatment device (not shown), where it is subjected to a predetermined treatment.

[0040] If the amount of liquid in the liquid drainage passage 67 is excessive, discharging the liquid L from the first discharge part 61 may cause the liquid to overflow from the liquid drainage passage 67. Therefore, in the liquid ring dust collector 10 of the embodiment, even if the amount of liquid L in the liquid chamber 2 exceeds the second threshold, if the amount of liquid in the liquid drainage passage 67 that receives the liquid drained from the first discharge part 61 exceeds a third threshold, the first discharge part 61 is closed. In this case, discharge of liquid to the liquid drainage passage 67 is prevented. The third threshold can be set by experiment or simulation so that the amount of liquid overflowing from the liquid drainage passage 67 can be kept at a desired level or below.

[0041] In this embodiment, the second liquid level sensor 68 is provided in the drainage passage 67, detects the liquid level corresponding to the amount of liquid in the drainage passage 67, and provides the detection result to the information processing unit 4. Based on the detection result of the second liquid level sensor 68, the information processing unit 4 controls the first discharge part 61 to close and stop discharging the liquid L when the amount of liquid in the drainage passage 67 exceeds a third threshold value.

[0042] The second exhaust section 71 will now be described. While the exhaust gas G from the discharge port 54 of the exhaust duct 5 moves through the gas chamber 3, some of the dust contained in the exhaust gas G falls and accumulates on the bottom 26 of the gas chamber 3. The dust accumulated on the bottom 26 is called deposit P. As mentioned above, if too much deposit P accumulates, it becomes difficult to collect and may cause rust in the gas chamber 3.

[0043] Therefore, the discharge mechanism 6 of the embodiment includes a second discharge section 71 that has an open state in which the deposit P in the gas chamber 3 can be discharged and a closed state in which discharge of the deposit P is prevented. The second discharge section 71 may be provided anywhere as long as it can discharge the deposit P in the gas chamber 3, but the second discharge section 71 of the embodiment is provided on the bottom 26 of the gas chamber 3. The number of second discharge sections 71 is not limited, but in the example of FIG. 4, multiple second discharge sections 71 are provided at predetermined intervals in the longitudinal direction (left-right direction) of the gas chamber 3. The multiple second discharge sections 71 may be arranged at equal intervals or at unequal intervals.

[0044] The position of the second discharge part 71 in the front-rear direction is not limited, and in the example of Fig. 4, the second discharge part 71 is disposed in the center of the front-rear direction of the gas chamber 3. The multiple second discharge parts 71 may be disposed along one row extending left and right, or along multiple rows.

[0045] The configuration of the second discharge unit 71 is not limited as long as it is possible to discharge the sediment P and stop the discharge. In the embodiment, the second discharge unit 71 has a valve mechanism that can be opened and closed. From the viewpoint of not increasing the number of operational steps, it is desirable that the second discharge unit 71 be remotely controllable. Therefore, in the embodiment, the valve mechanism of the second discharge unit 71 is a second solenoid valve 72. The open / close state of the second solenoid valve 72 in the embodiment is controlled in accordance with the control of the information processing unit 4. The valve mechanism of the second discharge unit 71 is not limited to a solenoid valve, and may have an automatic opening / closing mechanism that is automatically opened and closed based on a non-electromagnetic principle, or may be a manual valve that can be opened and closed manually by an operator.

[0046] An example of the automatic opening and closing mechanism 73 will be described with reference to Fig. 5. Fig. 5 is a side cross-sectional view that schematically shows the automatic opening and closing mechanism 73. The second discharge section 71 may be provided with the automatic opening and closing mechanism 73 that is automatically opened and closed based on a non-electromagnetic principle. There is no limitation on the operating principle of the automatic opening and closing mechanism 73, but the automatic opening and closing mechanism 73 in the example of Fig. 5 is a valve mechanism that discharges at least a portion of the deposit P when the force generated in accordance with the mass of the deposit P in the gas chamber 3 exceeds a reference value.

[0047] 5, the automatic opening / closing mechanism 73 includes a tubular portion 74, a movable lid portion 76, a fulcrum portion 77, an arm portion 78, and a biasing means 79. The tubular portion 74 is a tubular member extending downward from the second discharge portion 71 and has an opening 75 at its lower end. The tubular portion 74 has the opening 75 formed along a surface inclined at approximately 30° with respect to the horizontal plane.

[0048] Movable lid portion 76 is a lid member that can open and close opening 75 by rotating around fulcrum portion 77. Fulcrum portion 77 is provided at the connection between movable lid portion 76 and arm portion 78, and rotatably supports movable lid portion 76 and arm portion 78. Fulcrum portion 77 may be supported by tube portion 74. Biasing means 79 is means for applying a biasing force to arm portion 78 in the direction in which movable lid portion 76 closes opening 75 (clockwise direction in FIG. 5), and is a weight in the example of FIG. 5.

[0049] A force in the opening direction is applied to the movable lid portion 76 due to gravity acting in accordance with the mass of the deposit P in the tubular portion 74. Meanwhile, a force in the closing direction is applied to the movable lid portion 76 due to gravity acting in accordance with the mass of the biasing means 79, in addition to the force due to the negative pressure. In other words, the automatic opening / closing mechanism 73 functions as a lever that rotates around the fulcrum portion 77 due to the difference between the force in the opening direction and the force in the closing direction. Therefore, when the mass of the deposit P accumulated in the tubular portion 74 is smaller than the reference value, the force in the closing direction is greater than the force in the opening direction, and the movable lid portion 76 remains closed.

[0050] When the mass of the deposit P accumulated in the tubular portion 74 exceeds a reference value, the force in the opening direction becomes greater than the force in the closing direction, and the movable lid portion 76 changes from a closed state to an open state (shown by the dashed line in FIG. 5), and at least a portion of the deposit P is discharged. When discharge of the deposit P begins, the force of the discharge flow of the deposit P holds back the movable lid portion 76, and the open state is maintained for a certain period of time, during which time the deposit P around the second discharge portion 71 is discharged. When a certain amount of the deposit P has been discharged, the force in the opening direction weakens, and the movable lid portion 76 closes the opening 75 of the tubular portion 74 with the force in the closing direction.

[0051] The information processing unit 4 will be described with reference to Figure 3. Each functional block of the information processing unit 4 shown in Figure 3 can be realized in terms of hardware by elements such as a computer processor, CPU, and memory, electronic circuits, and mechanical devices, and in terms of software by a computer program, etc., but here, functional blocks realized by cooperation of these elements are depicted. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various ways by combining hardware and software.

[0052] The information processing unit 4 includes an input unit 41, a first opening / closing control unit 43, a second opening / closing control unit 44, a supply control unit 45, and a timing management unit 46. The input unit 41 acquires the detection results of the first liquid level sensor 64 and the second liquid level sensor 68. The first opening / closing control unit 43 controls the opening and closing of the first solenoid valve 62. The second opening / closing control unit 44 controls the opening and closing of the second solenoid valve 72. The supply control unit 45 controls the opening and closing of the liquid supply unit 63. The timing management unit 46 manages the opening and closing timings of the first solenoid valve 62 and the second solenoid valve 72 based on preset information.

[0053] The liquid ring dust collector 10 can perform the following operations under the control of the information processing unit 4. (1) The liquid-sealed dust collector 10 opens the liquid supply section 63 to supply the liquid L to the liquid chamber 2 when the amount of the liquid L in the liquid chamber 2 becomes equal to or less than a first threshold value, and closes the liquid supply section 63 to stop the supply of the liquid L when the amount of the liquid L exceeds the first threshold value by a predetermined amount. (2) The liquid-sealed dust collector 10 opens the first discharge section 61 to discharge the liquid L when the amount of liquid L in the liquid chamber 2 exceeds a second threshold, and closes the first discharge section 61 to stop the discharge of the liquid L when the amount of liquid L falls below the second threshold by a predetermined amount. (3) Regardless of the amount of liquid L in the liquid chamber 2, the liquid ring dust collector 10 closes the first discharge part 61 to prevent the discharge of liquid L when the amount of liquid in the discharge passage 67 exceeds the third threshold value.

[0054] (4) The liquid ring dust collector 10 opens and closes the first solenoid valve 62 and the second solenoid valve 72 at predetermined times to discharge deposits. The predetermined times may occur periodically, such as every few hours, every day, or every week, or may occur irregularly. The opening and closing times of the first solenoid valve 62 and the second solenoid valve 72 may be the same or different. The opening and closing frequencies of the first solenoid valve 62 and the second solenoid valve 72 may be the same or different.

[0055] When multiple first solenoid valves 62 are provided, the opening and closing timings of the multiple first solenoid valves 62 may be the same or may be different from each other. When multiple second solenoid valves 72 are provided, the opening and closing timings of the multiple second solenoid valves 72 may be the same or may be different from each other.

[0056] The features of the liquid ring dust collector 10 configured as above will be described below. The liquid ring dust collector 10 comprises 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 the liquid seal portion 52 provided in the exhaust duct 5, a gas chamber 3 that collects and discharges the exhaust gas G from the exhaust duct 5, and a discharge mechanism 6 that discharges deposits that have accumulated in at least one of the liquid chambers 2 and the gas chamber 3.

[0057] According to this configuration, by providing the discharge mechanism 6, deposits that have accumulated in the liquid chamber 2 and the gas chamber 3 can be easily discharged. Because deposits in the liquid chamber 2 are properly discharged, it is possible to almost completely avoid contact between the deposits and the liquid seal part 52. Because deposits in the gas chamber 3 are properly discharged, it is possible to suppress corrosion of the gas chamber 3 caused by the deposits.

[0058] As an example, the discharge mechanism 6 includes a first discharge part 61 provided in the liquid chamber 2, and the first discharge part 61 has an open state in which the deposit S in the liquid chamber 2 can be discharged, and a closed state in which the discharge of the deposit S is inhibited. In this case, by switching between the open state and the closed state, the deposit S in the liquid chamber 2 can be easily discharged.

[0059] As an example, a plurality of first discharge portions 61 are provided at predetermined intervals in the longitudinal direction of the liquid chamber 2 on the bottom 25 of the liquid chamber 2. In this case, the plurality of first discharge portions 61 on the bottom 25 can efficiently discharge the sediment S accumulated on the bottom 25 along the longitudinal direction.

[0060] As an example, when the first discharge portion 61 is in the open state, it can discharge the sediment S together with the liquid L in the liquid chamber 2. In this case, the liquid L increases the fluidity of the sediment S, allowing it to be discharged efficiently.

[0061] As an example, the liquid ring dust collector 10 further includes a liquid supply unit 63 that supplies liquid L to the liquid chamber 2 when the amount of liquid L in the liquid chamber 2 is equal to or less than a first threshold value. In this case, liquid L can be supplied before the amount of liquid L becomes insufficient, thereby maintaining the liquid sealing performance.

[0062] As an example, when the amount of liquid L in the liquid chamber 2 exceeds the second threshold, the liquid ring dust collector 10 discharges the liquid L in the liquid chamber 2 from the first discharge portion 61. In this case, by discharging the liquid L before the amount of liquid L becomes excessive, it is possible to prevent the liquid L from overflowing into the gas chamber 3.

[0063] As an example, even if the amount of liquid L in the liquid chamber 2 exceeds the second threshold, the liquid ring dust collector 10 closes the first discharge part 61 if the amount of liquid in the drainage passage 67 that receives the liquid discharged from the first discharge part 61 exceeds a third threshold. In this case, by stopping the discharge before the amount of liquid in the drainage passage 67 becomes excessive, it is possible to prevent the liquid from overflowing from the drainage passage 67.

[0064] As an example, the discharge mechanism 6 includes a second discharge part 71 provided in the gas chamber 3, and the second discharge part 71 has an open state in which the deposit P in the gas chamber 3 can be discharged, and a closed state in which the discharge of the deposit P is inhibited. In this case, the deposit P in the gas chamber 3 can be easily discharged by switching between the open state and the closed state.

[0065] The second discharge portions 71 are provided at least at both longitudinal ends of the gas chamber 3. As an example, a plurality of second discharge portions 71 are provided at predetermined intervals in the longitudinal direction of the gas chamber 3 in the bottom 26 of the gas chamber 3. In this case, the plurality of second discharge portions 71 in the bottom 26 can efficiently discharge the sediment P accumulated in the bottom 26 along the longitudinal direction.

[0066] As an example, the second discharge part 71 discharges the deposit P when the force generated according to the mass of the deposit P in the gas chamber 3 exceeds a reference value. In this case, unlike a solenoid valve, it can be configured without using electrical means, and the deposit P can be discharged even if a power outage or communication error occurs. Compared to using a manual valve, it can reduce the amount of operational work required.

[0067] As an example, the discharge mechanism 6 includes a solenoid valve or a manual valve. When a solenoid valve is used, the discharge and stopping of sediment discharge can be remotely controlled, reducing the amount of operational work required. When a manual valve is used, it is cost-effective and allows sediment discharge even in the event of a power outage or communication error.

[0068] As an example, the discharge mechanism 6 includes a solenoid valve that is controlled to open and close at predetermined times. In this case, the solenoid valve can be opened and closed at regular or irregular intervals to control discharge of deposits and to stop the discharge, thereby reducing the number of operational steps.

[0069] 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.

[0070] (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.

[0071] In the above description, an example was shown in which the opening 75 of the tubular portion 74 is formed along a surface inclined at approximately 30° with respect to the horizontal plane, but this is not limiting. For example, the angle of the opening with respect to the horizontal plane may be set in the range of 0° to 90°, or may be set at another angle.

[0072] In the above description, an example was shown in which the bottoms 25, 26 have flat surfaces parallel to the horizontal plane, but this is not limiting. For example, the bottoms may include an inclined surface inclined relative to the horizontal plane, or a curved surface. The bottoms may also include inclined surfaces that gradually decrease in height toward the first and second discharge sections. In this case, the sediment moves due to gravity and accumulates near the first and second discharge sections, allowing the sediment to be efficiently discharged.

[0073] In the above description, an example in which the biasing means 79 is a weight is shown, but the biasing means is not limited to this. For example, the biasing means may include a spring that can apply a biasing force in the direction of closing the movable cover.

[0074] 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.

[0075] 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.

[0076] Each of the above-described modifications provides the same functions and effects as the embodiment.

[0077] 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]

[0078] 2 liquid chamber, 3 gas chamber, 5 exhaust duct, 6 discharge mechanism, 10 liquid ring dust collector, 11 dust collector body, 52 liquid ring section, 61 first discharge section, 62 first solenoid valve, 67 discharge passage, 71 second discharge section, 72 second solenoid valve, 73 automatic opening / closing mechanism, 90 mobile unit.

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 discharge mechanism for discharging deposits accumulated in at least one of the liquid chamber and the gas chamber; A liquid-sealed dust collector equipped with:

2. the discharge mechanism includes a first discharge portion provided in the liquid chamber, The liquid ring dust collector according to claim 1 , wherein the first discharge portion has an open state in which the deposits in the liquid chamber can be discharged, and a closed state in which the discharge of the deposits is inhibited.

3. The liquid ring dust collecting device according to claim 2 , wherein a plurality of the first discharge portions are provided at a bottom of the liquid chamber at predetermined intervals in the longitudinal direction of the liquid chamber.

4. The liquid ring dust collector according to claim 2 , wherein the first discharge portion is capable of discharging the deposit together with the liquid in the liquid chamber when in the open state.

5. The liquid ring dust collector according to claim 4 , further comprising a liquid supply unit that supplies liquid to the liquid chamber when the amount of liquid in the liquid chamber is equal to or less than a first threshold value.

6. The liquid ring dust collector according to claim 4 , wherein the liquid in the liquid chamber is discharged from the first discharge portion when the amount of liquid in the liquid chamber exceeds a second threshold value.

7. 7. The liquid-sealed dust collector according to claim 6, wherein even if the amount of liquid in the liquid chamber exceeds a second threshold, the first discharge portion is closed if the amount of liquid in the discharge passage that receives the liquid discharged from the first discharge portion exceeds a third threshold.

8. the exhaust mechanism includes a second exhaust portion provided in the gas chamber, The liquid ring dust collector according to claim 1 , wherein the second discharge section has an open state in which the deposits in the gas chamber can be discharged, and a closed state in which the discharge of the deposits is inhibited.

9. The liquid ring dust collector according to claim 8 , wherein a plurality of the second discharge sections are provided at a bottom of the gas chamber at predetermined intervals in the longitudinal direction of the gas chamber.

10. The liquid ring dust collector according to claim 8 , wherein the second discharge section discharges the deposits when a force generated in accordance with a mass of the deposits in the gas chamber exceeds a reference value.

11. The liquid ring dust collector according to claim 1 , wherein the discharge mechanism includes an electromagnetic valve or a manual valve.

12. 2. The liquid ring dust collector according to claim 1, wherein the discharge mechanism includes an electromagnetic valve that is controlled to open and close at predetermined times.

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