JP4115235B2 - Coke oven dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a dust collector of a coke oven used for collecting dust discharged from a kiln of each carbonization chamber of a coke oven that produces coal by carbonizing coal.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a coke oven dust collector 100 as shown in FIG. 8 described in JP-A-56-28287 is known. The kiln dust collector 100 is for collecting dust discharged from the kiln C2 of the coke oven C in which a large number of coking chambers C1 are arranged in parallel, and between the backstays 101 above the furnace lid 102. The kiln hoods (furnace side hoods) 103 respectively disposed in each, the connecting ducts 104 connected to the respective kiln hoods 103 on the base end sides, and the collective ducts 105 connected to the leading end sides of the connecting ducts 104. It is prepared for.
[0003]
The dust discharged from the kiln C2 during the operation of the coke oven C is captured by the kiln hood 103, and then accompanied by the suction air, through the connecting ducts 104 and the collective ducts 105, on the ground. It is introduced into a dust collector, and dust collection processing is performed by this dust collector.
[0004]
Such a kiln dust collecting apparatus 100 has been used for a long time so that the dust discharged from the kiln C2 of the coke oven C into the atmosphere can be effectively captured by the kiln dust collecting apparatus 100. The achievements in preventing air pollution are great.
[0005]
[Patent Document 1]
JP 56-28287 A
[Patent Document 2]
JP-A-56-5888
[Patent Document 3]
JP 58-152089 A
[Patent Document 4]
Japanese Utility Model Publication No. 62-21051
[0006]
[Problems to be solved by the invention]
By the way, much dust is discharged from the furnace port of the coke oven C when the coal is charged into the carbonizing chamber C1 of the coke oven C and when the coke is discharged from the carbonizing chamber C1 after the dry distillation is completed.
[0007]
That is, at the time of coal charging, a so-called leveling operation is performed in which the level of coal in the carbonization chamber C1 is leveled by the leveler of the extruder while the small lid at the top of the furnace lid 102 is opened. Dust emission from the so-called machine-side kiln C2 which is the processed side increases.
[0008]
On the other hand, when the coke is discharged, the furnace lid 102 is removed from the coking chamber C1 on both the machine side and the so-called coke side on which the guide wheel is disposed, so that the red hot coke in the coking chamber C1 is discharged from the kiln C2. It will be in the state exposed to the exterior over the full length of the vertical direction of the carbonization chamber C1, and a lot of dust will be generated from the red hot coke. Further, when coke is pushed out from the carbonization chamber C1 by driving the ram of the extruder, red hot coke is discharged from the coke side kiln through the guide car toward the fire extinguisher, so the coke side kiln C2 Dust emission from the plant is very high.
[0009]
In order to effectively capture dust with the kiln opening hood 103 corresponding to the target carbonization chamber C1 when such dust is frequently generated, each communication duct 104 is provided with an open / close damper 104a that is normally closed. Only the kiln hood 103 to be collected is opened. Thus, for example, when coke is discharged from the carbonization chamber C1, dust released from the carbonization chamber C1 is captured by the kiln hood 103 with the open / close damper 104a open, and is installed on the ground via the collective duct 105. It will be introduced into the dust collection process and will be subjected to the dust collection process.
[0010]
However, in the conventional kiln dust collector 100 as described above, each kiln hood 103 is provided above the kiln C2 of each carbonization chamber C1, so that the furnace lid 102 is removed. Thus, the distance from the vertically long red hot coke exposed to the outside to the kiln hood 103 is considerably long. Therefore, a disturbance such as a cross wind acts before the hot air flow including dust generated from the red hot coke reaches the kiln mouth hood 103. Then, the dust diffuses into the outside air before reaching the kiln hood 103 and cannot be reliably captured. Therefore, the actual situation is that the conventional kiln dust collector 100 is not effective in preventing environmental pollution.
[0011]
Therefore, it is conceivable to enlarge the kiln hood 103 by using the conventional kiln dust collecting system as described above to widen the dust trapping range. In this way, the extruder in which the kiln hood is a moving machine. In fact, it cannot be realized because it interferes with the guide car.
[0012]
The present invention has been made to solve the above-described problems, and a coke oven kiln dust collector that can more reliably capture dust discharged from the coke oven kiln in the coal carbonization process. In particular, an object of the present invention is to provide a dust collector for a coke oven that can reliably cope with the timing when a large amount of dust is discharged from the kiln.
[0013]
[Means for Solving the Problems]
  In the invention according to claim 1, dust discharged from the kiln opening of each coking chamber of a coke oven in which a plurality of coking chambers are arranged side by side., Provided at the part facing the kiln opening of the working machine such as an extruder and a guide car used when discharging coke from each carbonization chamberA dust collector for a coke oven that captures and sucks and collects dust with a dust collection hood, and the dust collection hood includes:In order to prevent the dust discharged from the kiln from being scattered outside, the kiln mouth with a kiln mouth hood or dust guide plate that is fixed to the coke oven at the upper position of the kiln and guides the dust emitted from the kiln. And the portion facing the kiln hood or the dust guide plate is an upper flap, and the upper flap has the tip portion of the kiln hood or The posture can be changed between a contact posture that contacts the dust guide plate and a contact release posture that releases the contact.It is characterized by that.
[0014]
In coke ovens, when coke is discharged from the carbonization chamber, workers and various equipment discharge coke in the work area set in front of the furnace corresponding to the multiple chambers of the carbonization chamber so as to include the kiln opening. And a predetermined series of operations related to cleaning of the furnace lid and the like.
[0015]
Specifically, as the series of operations, a furnace lid removing operation for removing a furnace lid attached to a carbonization chamber subject to coke discharge, a coke is removed from the carbonization chamber from which the furnace lid has been removed by driving an extruder ram. From the furnace to the coke side, door (furnace lid) cleaning work to remove and clean coal tar adhering to the removed furnace lid, and the carbonization chamber kiln with the furnace lid removed Extruder and guide car for sheet (frame) cleaning work that removes and cleans coal tar attached to the frame of the mouth, and furnace cover installation work to install the furnace cover once removed to the carbonization chamber It can be cited as a common thing.
[0016]
In addition, as the work unique to the extruder, when the raw coal is charged into the carbonization chamber from the top of the furnace via the charging vehicle with the furnace lid mounted on the carbonization chamber after coke discharge, Leveling work to level the height of coal. While these series of operations are being carried out, a large amount of dust is discharged from the coke oven's kiln, but the kiln dust collector of the present invention effectively captures such dust. It is for collecting dust.
[0017]
  AndIn the present invention, the dust collection hood is provided at a portion facing the kiln opening of a work machine such as an extruder or a guide car used when discharging coke from each carbonization chamber.Because the dust collection hood for the kiln is provided in one or both of the extruder and the guide car (hereinafter collectively referred to as the work machine), the work machine can release a large amount of dust by opening the furnace lid. Since the dust collection hood is in a state facing the kiln entrance of the carbonization chamber while moving to the carbonization chamber where the work is released, a large amount of dust discharged from the red coke in the carbonization chamber is surely collected. Captured by
[0018]
In particular, on the side where the extruder is provided (machine side), a leveling operation is performed to equalize the coal level in the carbonization chamber when the coal is charged into the carbonization chamber. Dust is discharged to the outside from the small lid opening the furnace lid, but by providing a dust collecting hood in the extruder, the emitted dust from the small lid can be captured effectively.
[0019]
  in this way,BookAccording to the invention, some conventional fixed-type furnace-side hoods could not reliably capture dust discharged from the small lid opening with the furnace lid open or the furnace lid mounted Thus, it is possible to reliably prevent dust from being scattered from the coke oven, which contributes greatly to the prevention of air pollution.
[0020]
  In this invention, the work area in the kiln is for work set in front of the furnace corresponding to the plural chambers of the coking chamber so as to include the kiln that is the target of the coke discharging work from the coking chamber. It is an area, and the worker performs the series of operations related to coke discharge in this work area. Further, in the present invention, the dust discharge area is an area in which a large amount of dust is discharged from the kiln in the working area, and specifically, the kiln of the carbonization chamber to which coke is discharged. Is a region at least the same width as this reference kiln and above a predetermined height position.
[0021]
  According to the present invention, the gas containing dust released from the opened kiln becomes lighter than the outside air due to the decrease in specific gravity due to the high temperature, thereby rising along the surface of the coke oven from the kiln. The rising dust-containing gas is captured by the dust scattering prevention means fixed to the coke oven and guided to the dust collecting hood on the work machine side, so that dust from the kiln can be captured more effectively. It becomes possible.
[0022]
  In addition, when not providing dust scattering prevention means on the coke oven side, it is necessary to make the part covering the upper part of the work area in the dust collecting hood on the work machine side contact the surface of the coke oven, A member (specifically, a backstay) for supporting the furnace body is provided on the surface of the coke oven with the kiln opening in between. Not only is it difficult to provide a means to replace the dust scattering prevention means, but even if it can be provided, the equipment cost increases. In order to suppress such an increase in equipment cost, it is useful to install dust scattering prevention means in the coke oven.
[0023]
  According to this invention, with the work machine facing the kiln opening of the carbonization chamber to be worked, the upper flap is set in the contact posture so that the tip of the upper flap hits the dust-scattering prevention means on the furnace side. As a result, the dust collection hood completely covers the dust discharge area of the kiln from the top through dust scattering prevention means, so the dust discharged from the kiln is reliably captured by the dust collecting hood. can do.
[0024]
  When the work machine moves, the contact of the upper flap with the dust scattering prevention means is eliminated by changing the posture of the upper flap from the contact posture to the contact release posture. The flap can move smoothly without interfering with the dust scattering prevention means.
[0025]
  Claim2The described invention is claimed.1In the described invention, the dust collection hood further includes a lower cover plate capable of covering a lower portion of the dust discharge region in the kiln.It is configured to be able to introduce dust between the upper flap and the lower cover plateIt is characterized by that.
[0026]
  And claims2According to the described invention, since the dust collecting hood is provided with the lower cover plate that can cover the lower part of the dust multi-emission area as described above, most of the dust discharged from the kiln opening is concerned. While being guided by the lower cover plate, it is reliably captured by the dust collection hood without being affected by disturbance factors.
[0027]
  Therefore, in a dust collection hood that is fixed to a coke oven that does not have a lower cover plate in the conventional dust-rich release area, the dust once discharged from the kiln to the dust-rich release area induces the dust. However, there is an inconvenience that the external airflow from the lower side enters the dust collecting hood, which makes it impossible to capture dust effectively by the hood.2Such an inconvenience does not occur in the present invention.
[0028]
  According to a third aspect of the present invention, in the first or second aspect of the present invention, the upper flap rotates around a horizontal axis so that the tip end is the edge of the kiln hood or the tip of the dust guide plate. It is comprised so that it may contact | abut with a part.
[0029]
  Invention of Claim 4 is an extruder used when discharging | emitting coke from each carbonization chamber, the dust discharged | emitted from the kiln of each carbonization chamber of the coke oven in which a plurality of carbonization chambers are arranged in parallel, It is collected in a dust collection hood that is provided in the part facing the kiln opening of a work machine such as a guide car and is configured to cover the upper part and both sides of the dust discharge area at the kiln. A dust collector for a coke oven for dust treatment, wherein the dust collection hood covers a housing that forms a suction passage through which dust can be introduced, and a lower part of a dust multiple discharge area in the kiln, And a lower cover plate projecting from the lower edge of the housing toward the lower part of the dust-rich emission region.
[0030]
  In the invention of claim 4, since the dust collecting hood can cover the upper part and both side parts of the work area in the kiln opening, the carbonization is performed in a state where the work machine is moved to the work object carbonization chamber. In the work area in front of the furnace including the chamber, not only dust discharged from the kiln but also dust generated during the series of work in the work area is captured by a dust collection hood that covers the upper and both sides of the work area. And most dust generated in the work area is collected more reliably.
[0031]
  Accordingly, in the case where the hood is provided only at the upper part of the conventional kiln, there is a disadvantage that dust is discharged to the outside from the side of the kiln that is not covered at all. Such inconvenience does not occur, and dust capturing efficiency is greatly improved.
[0032]
  And according to invention of Claim 4, since the lower cover plate which can cover the lower part of the above dust multiple discharge | emission area | region is provided in the dust collection hood, the dust discharged | emitted from the kiln is, Most of it is guided to the lower cover plate and reliably captured by the dust collection hood without being affected by disturbance factors.
[0033]
  Therefore, in a dust collection hood that is fixed to a coke oven that does not have a lower cover plate in the conventional dust-rich release area, the dust once discharged from the kiln to the dust-rich release area induces the dust. However, there is a disadvantage that the external airflow from the lower side enters the dust collecting hood, which makes it impossible to effectively capture the dust with the hood. However, the invention of claim 4 has such a disadvantage. It does not occur.
[0040]
DETAILED DESCRIPTION OF THE INVENTION
Before explaining the kiln dust collector according to the present invention, a coke oven to which the kiln dust collector is applied will be explained. FIG. 1 is a front view of a coke oven as viewed from the machine side (side on which an extruder is disposed). In FIG. 1, the rising pipe and the collecting main are not shown. As shown in this figure, the coke oven C is a structure formed by precisely stacking bricks, and a plurality of carbonization chambers C1 (usually 50 to 100 chambers per furnace group) are arranged in parallel. . Such a coke oven C is structured with bricks piled up, for example, externally covered with hardware such as a backstay 101 interposed between the carbonization chambers C1, and fastened with a cross tie rod or a long tie rod (not shown). Strength is ensured.
[0041]
The carbonization chamber C1 is usually formed in an elongated rectangular parallelepiped shape in which the furnace width dimension is set to 400 mm to 450 mm, the furnace height dimension is set to 4.0 m to 6.5 m, and the furnace length dimension is set to 15.0 m to 20.0 m. . The openings formed in the front and back surfaces of the carbonization chamber C1 can be closed by a removable furnace lid 102. In particular, the furnace lid 102 on the machine side (the side where the extruder is disposed) is provided with a small lid 106 that can be opened and closed at the top.
[0042]
Then, with the furnace lid 102 attached to the carbonization chamber C1, raw material coal is charged into the carbonization chamber C1 through an inlet provided at the top of the furnace, and the raw coal is subjected to dry distillation treatment. Become. A combustion chamber is provided between the adjacent carbonization chambers C1, and fuel gas is continuously supplied to the combustion chambers. Therefore, the raw coal starts dry distillation immediately after being charged into the carbonization chamber C1. Will be. The coke oven gas generated as a result of dry distillation is sent to the subsequent gas processing facility through the ascending pipe 109 and the collecting main 110 (FIG. 2), and after a predetermined cleaning process is performed in the gas processing facility, Used as an energy source in the factory.
[0043]
On the other hand, the coke finally produced by the dry distillation process of the raw coal is extruded from the machine side toward the coke side (opposite side of the machine side) by the extruder after the furnace lid 102 is removed, and passes through the coke guide wheel. It is received by a fire extinguisher, and then processed as product coke in a fire extinguishing process.
[0044]
In such a coke oven C, a kiln hood (furnace side hood) 103 is provided in the upper part of the coke oven C for all the carbonization chambers C1, and each kiln hood 103 is connected to a communication duct. It is connected to a collective duct 105 disposed at the top position of the coke oven C via 104. Each connecting duct 104 is provided with an open / close damper 104a, and only the open / close damper 104a of the kiln hood 103 corresponding to the kiln opening to be collected is opened, while the other open / close dampers 104a are kept closed. The Since the airflow including dust generated at the kiln opening is high temperature, the specific gravity is smaller than that of the outside air, and as a result, it rises in the outside air. Then, this updraft is captured by the kiln hood 103 and then collected in the collecting duct 105 via the connecting duct 104 so that the dust collecting process is performed by the furnace side hood dust collecting apparatus X provided outside the system. It has become.
[0045]
By the way, when discharging the coke K from the carbonization chamber C1 after the dry distillation of the raw coal, as shown by the third carbonization chamber C1 from the right in FIG. 1, the furnace lids 102 on both sides are removed, and in this state The coke K is pushed out from the machine side toward the coke side by the extrusion operation by driving the ram (extrusion bar) of the extruder. At this time, the main coke is removed from the kiln opening of the carbonization chamber C1 from which the furnace lid 102 is removed. A large amount of dust consisting of fine particles of coke K is generated in the air and rises in the atmosphere accompanying the hot airflow. However, such a large amount of dust is a crosswind from the generation position until it reaches the kiln hood 103. Because it often diffuses into the atmosphere due to the influence of the above, it cannot be captured efficiently.
[0046]
When the coal is charged into the carbonization chamber C1, as shown in the second furnace lid 102 from the left in FIG. 1, the small lid 106 provided on the upper portion of the furnace lid 102 is opened, and this small lid A leveler 93 (FIG. 2) which is a leveling bar of the extruder is inserted through the opening 106. A so-called leveling process is performed in which the height level of the raw coal is made uniform by reciprocating the leveler 93 in the carbonization chamber C1.
[0047]
During this leveling process, high-pressure dewatered water (ammonia water set to a predetermined high pressure) is injected from the ascending pipe 109 (FIG. 2) toward the collecting main body 110, and the ejector effect by this jet flow causes the inside of the carbonization chamber C1. Most of the generated large amount of raw gas is introduced into the collecting main body 110.
[0048]
However, during this leveling treatment, powdery raw coal (pulverized coal) is drawn out from the opening of the small lid 106 along with the leveler 93 pulled back from the carbonization chamber C1, and dust is generated by the scattering of the coal. However, such dust cannot be reliably captured by the kiln hood 103 alone.
[0049]
Therefore, in the present invention, the extruder is equipped with a hood portion in the kiln dust collector, and the raw gas (a certain amount of dust is also contained in the raw gas) by the dust collecting hood on the extruder. And a large amount of coke fine powder (dust) is captured, and the captured airflow is introduced into the dust collector main unit installed on the ground via a joint duct. Processing is performed.
[0050]
In the present embodiment, the kiln opening hood 103 is used as dust scattering prevention means according to the present invention for guiding dust discharged from the kiln opening to the dust collecting hood, unless particularly necessary. , Dust collection by the dust collector X using the kiln hood 103 is not performed. Therefore, the open / close dampers 104a of all the communication ducts 104 are closed.
[0051]
The reason why the kiln hood 103 is not used for collecting dust in the kiln dust collection in the present embodiment but is used as dust scattering prevention means is as follows. That is, the kiln hood 103 has already been installed before the kiln throat dust collector 10 of the present invention is adopted. In particular, dust is collected by the kiln hood 103 and collected by the dust collector X. Even if it is not, dust can be reliably captured by the dust collecting hood 20 of the present invention mounted on the extruder 90 and the dust collecting body 50 can reliably perform dust collecting processing, and in particular, the existing kiln hood 103 can be removed. If it is possible to use the kiln hood 103 as a dust scattering prevention means and a lot of dust is generated from the kiln which the extruder 90 does not face, the dust hood 103 is used as the kiln hood. For example, it can be captured at 103 and the dust collecting device X can perform the dust collecting process.
[0052]
FIG. 2 is a schematic side view of an extruder for explaining an embodiment of a kiln dust collector according to the present invention, and FIG. 3 is a schematic plan view thereof. As shown in these drawings, the extruder 90 has a pair of rails laid in parallel to the furnace group direction (direction orthogonal to the paper surface of FIG. 2) of the coke oven C in which a plurality of carbonization chambers C1 are arranged in parallel. It is configured to be able to run under the guidance of C3 and moves to the carbonization chamber C1 where the carbonization has been completed to push out the coke K in the carbonization chamber C1 and feed the raw material from the top to the empty carbonization chamber C1 after extrusion. When inserting the coal, a so-called leveling process is performed to level the height of the raw coal in the carbonization chamber C1.
[0053]
The extruder 90 has a long rectangular shape in a direction orthogonal to the traveling direction (direction orthogonal to the paper surface of FIG. 2) in plan view (FIG. 3), and is a structure formed by combining various steel materials. The basic structure provided with the extruder main body 91 which has a wheel in the bottom part, the extrusion ram 92 with which this extruder main body 91 was equipped, the leveler 93, the furnace lid attaching / detaching machine 94, and the dust collecting hood 20 is provided. Have. In addition to these, there may be a furnace lid cleaner attached to the inner surface side of the furnace lid 102 to scrape off the accumulated tar.
[0054]
The extrusion ram 92 includes a ram main body 92a that is set to be longer than the entire length of the carbonization chamber C1, and a ram head 92b that is fixed to the tip of the ram main body 92a and faces the coke K in the carbonization chamber C1. It is made up of. A rack is formed on the bottom surface of the ram main body 92a, and the pinion 92c meshing with the rack moves forward and backward with respect to the coke K in the coking chamber C1, and the furnace lid 102 is removed from the coke oven C. The coke K is pushed out from the carbonization chamber C1 during the forward movement.
[0055]
The leveler 93 is for leveling the height of the raw material coal in the carbonization chamber C1 during the charging operation of the raw material coal into the carbonization chamber C1, and the furnace lid 102 is attached to the coke oven C. When the small lid 106 is opened in this state, it enters the carbonization chamber C1 through the small lid opening, and leveling is performed on the raw coal charged in the carbonization chamber C1 by moving forward and backward in the carbonization chamber C1. Is to be given.
[0056]
The kiln dust collector 10 includes a dust collecting hood 20 that covers the work area Z1 in the kiln C2 of the coke oven C, and an on-machine duct 30 that transfers dust captured by the dust collecting hood 20. Has been. 2 and 3, the work area Z1 includes a front side of the extruder 90 (side facing the coke oven C), a surface side of the furnace lid 102 attached to the carbonization chamber C1, and This is a space surrounded by the lower surface side of the kiln opening hood 103 and the upper surface side of the service home 107. When the coke K is pushed out, the worker on the coke oven C side, the furnace lid attaching / detaching machine 94, etc. Work is performed in the work area Z1.
[0057]
The downstream end of the onboard duct 30 is connected to a water-sealed joint duct 40, and the joint duct 40 is connected to a subsequent large dust collector main body 50. By employing the water-sealed joint duct 40, the connection state of the on-machine duct 30 to the joint duct 40 can be ensured continuously and easily regardless of the movement of the extruder 90.
[0058]
FIG. 4 is a perspective view showing an embodiment of the joint duct 40. As shown in this figure, the joint duct 40 is a processing facility for the dust-containing gas G installed on the ground with the dust-containing gas G derived from the extruder 90 that moves forward and backward while being guided by the rail C3. In order to feed into the dust collector main body 50, it is interposed between the extruder 90 and the dust collector main body 50, so that the dust-containing gas G is continuously fed even when the extruder 90 is moving. It has become.
[0059]
The dust collector main body 50 receives the dust-containing gas G derived from the joint duct 40 and applies a dust collection process to the dust-containing gas G. The suction blower 51 for sucking the dust-containing gas G, A bag filter 52 that performs a predetermined process on the dust-containing gas G sucked by the suction blower 51 is provided.
[0060]
The joint duct 40 interposed between the extruder 90 and the dust collector main body 50 is formed in a single spiral shape in cross-sectional view, and is arranged in parallel with the moving direction of the extruder 90. A long container 41 set to a length dimension substantially the same as the movement range of 90, and extends in the longitudinal direction provided on one side wall of the long container 41 (the long side wall 44 on the right side shown in FIG. 4). It has a basic configuration that includes a lid member 46 and a standing partition plate 49 that is erected from the bottom of the long container 41 and extends over the entire length in the longitudinal direction.
[0061]
The long container 41 has a long bottom plate 42 extending over the moving range of the extruder 90 and a longitudinal direction projecting upward from one side edge (side edge on the extruder 90 side) of the bottom plate 42. And a long side wall 44 slightly longer than the short high side wall 43 projecting upward from the other side edge of the bottom plate 42 so as to face the short high side wall 43. And a pair of longitudinal end walls 45 for closing both ends.
[0062]
The lid member 46 includes a top plate 47 that extends from the upper edge of the long and high side wall 44 toward the short and high side wall 43 and extends over the entire length of the long and high side wall 44, and a leading edge of the top plate 47. It consists of a hanging partition plate 48 projecting downward. In the present embodiment, the width of the top plate 47 is set to approximately 3/4 of the inner size between the side walls 43 and 44, and the hanging partition plate 48 is in contact with the bottom plate 42 at the lower edge. The vertical dimension is set such that the first gap 48a extending between the lower end edge of the hanging partition plate 48 and the upper surface of the bottom plate 42 and extending over the entire length in the longitudinal direction in which the filling water W can flow. Has been.
[0063]
The standing partition plate 49 is provided on the bottom plate 42 so as to extend over the entire length in the longitudinal direction at a position close to the long side wall 44 from the hanging partition plate 48 while being spaced apart from the hanging partition plate 48 by a predetermined distance in the width direction. It is installed. Between the upper edge surface of the standing partition plate 49 and the lower surface of the top plate 47, a second gap 49a is formed that extends over the entire length in the longitudinal direction for the dust-containing gas G to flow therethrough.
[0064]
Further, an extraction duct 47a for extracting the connected dust-containing gas G is connected to an appropriate position of the top plate 47, and the dust-containing gas G supplied to the joint duct 40 from the extruder 90 via the on-machine duct 30 is connected. Is supplied to the dust collector main body 50 through the extraction duct 47a.
[0065]
In the joint duct 40 configured as described above, a liquid filling chamber 40 a filled with the filling water W is formed by the space surrounded by the bottom plate 42, the long side wall 44, the pair of end walls 45 and the standing partition plate 49. In addition, the surface of the filling water W existing between the hanging partition plate 48 and the standing partition plate 49, the portion protruding upward from the filling water W of the hanging partition plate 48, the top plate 47, and the long side wall 44. A dust accumulation chamber 40b is formed by a space surrounded by the bottom plate 42.
[0066]
That is, the liquid filling chamber 40 a of the long container 41 is filled with the filling water W so that the liquid level is higher than the lower end edge of the hanging partition plate 48 and lower than the upper edge of the standing partition plate 49. Thus, a dust accumulation chamber 40b in a sealed state is formed. Then, even if the dust accumulation chamber 40b is driven by the dust collector main body 50 and becomes a negative pressure through the extraction duct 47a, the filling water is set so that the liquid level in the liquid filling chamber 40a does not overflow over the standing partition plate 49. W water level is set.
[0067]
On the other hand, the on-machine duct 30 includes a duct main body 31 formed so as to follow the appearance of the extruder 90, and a U-shaped U-shaped duct 32 extending from the front end of the duct main body 31 in a front view. It is made up of.
[0068]
The U-shaped duct 32 hangs down from the bottom end 33 of the liquid filling chamber 40a between the short side wall 43 and the hanging partition plate 48, and from the lower end of the base end 33 through the first gap 48a. The partition plate 48 includes an intermediate portion 34 that extends to the right in the width direction in FIG. 4 and a tip portion 35 that extends upward from the tip of the intermediate portion 34.
[0069]
The base end 33 is set in an isosceles triangle shape in a side view. The width of the upper end of the base end portion 33 is set to be the same as the width of the extraction duct 47a, and the width dimension is gradually reduced toward the lower side. The lower part of the joint duct 40 can be loosely fitted with a margin in the narrow gap between the short and high side wall 43 and the hanging partition plate 48 while ensuring the same cross-sectional area.
[0070]
The intermediate part 34 is connected to the base end part 33 in a state where the vertical width dimension is set to be the same as the horizontal width dimension of the lower part of the base end part 33, and the distal end part 35 has an intermediate width part. It is connected to the intermediate part 34 in a state where the dimension is set to be the same as the vertical dimension of 34.
[0071]
And in this embodiment, it exhibits a triangular shape with a sharpened tip in a cross-sectional view so as to span the end face of the lower part of the base end part 33, the end face of the intermediate part 34, and the end face of the tip part 35, In addition, a pair of draining protrusions 36 having a U-shape in front view are provided in front and rear. Accordingly, when the U-shaped duct 32 moves back and forth in the filling water W in the liquid filling chamber 40a, the relative amount of the filling water W that collides with the end face of the U-shaped duct 32 due to the presence of the draining protrusion 36 relative to the U-shaped duct 32. This prevents the inconvenience that the filling water W overflows from the liquid filling chamber 40a.
[0072]
According to the on-machine duct 30 configured as described above, the tip 35 is raised with the hanging partition plate 48 of the liquid filling chamber 40a while the hanging partition plate 48 is hidden in the intermediate portion 34 of the U-shaped duct 32. By placing the U-shaped duct 32 in a water-sealed state by positioning it between the partition plate 49 and positioning the upper edge of the tip 35 above the water level of the filling water W (FIG. 1). The upper duct 30 can be connected to the joint duct 40.
[0073]
Next, returning to FIG. 2, a dust-rich discharge region Z2 as indicated by a thick dotted line is further set in the work region Z1 at the kiln C2. This dust multiple discharge area Z2 is a space where the most dust from the kiln C2 from which the furnace lid 102 has been removed gathers in the work area Z1, and in this embodiment, the lower edge of the kiln hood 103, Although it is set between the height position of the leveler 93 of the extruder 90, it is not limited to this and can be set in an appropriate range in the work area Z1 depending on the situation.
[0074]
And the dust trapped by the dust collection hood 20 is set by setting the pressure inside the on-machine duct 30 to a negative pressure through the joint duct 40 by driving a suction blower (not shown) provided in the dust collector main body 50. Then, the air is introduced into the dust collector main body 50 through the on-machine duct 30 and the joint duct 40 along with the intake air flow. After being captured by the dust collector main body 50 by, for example, a bag filter, only the purified air is discharged to the outside. It has become so.
[0075]
FIG. 5 is a schematic perspective view showing an embodiment of the dust collection hood 20 according to the present invention, and FIG. 6 is an explanatory view of the side view. As shown in these drawings, the dust collection hood 20 includes a pair of side shielding covers 21 covering both sides of the work area Z1 (a direction perpendicular to the paper surface of FIG. 6), and a pair of these side shielding covers. A plurality of chambers 22 provided at positions slightly spaced from the front end edge of the kiln hood 103 in the upper portion between 21, the front end edge on the upper side of each housing 22, and the front end edge of the kiln mouth hood 103. An upper flap 23 interposed therebetween, a lower flap (lower cover plate) 24 projecting from the lower front end edge of each housing 22 toward the lower portion of the dust-rich discharge region Z2, and the upper flap 23 Cylinder device as a drive means for changing the posture between a contact posture in which the front end portion is in contact with the kiln hood 103 and a contact release posture in which the contact of the front end portion with the kiln hood 103 is released 25 and configured with To have.
[0076]
In the present embodiment, the side shielding cover 21 is set so that the vertical dimension is shorter than the vertical dimension of the work area Z1, and the length dimension (the dimension in the direction orthogonal to the furnace row direction of the coke oven C). ) Is set to be approximately the same as the dimension between the backstay 101 and the side wall of the extruder main body 91, so that both sides in the width direction of the furnace front positions of the coke oven C (that is, the work area Z1) are set. A pair of side shielding covers 21 are covered.
[0077]
The housing 22 includes a top plate 22a positioned slightly below the lower edge of the kiln hood 103, a bottom plate 22b facing the top plate 22a in the lower part, and a rear plate of the top plate 22a and the bottom plate 22b. A suction passage is formed between the top plate 22a and the bottom plate 22b for guiding the dust trapped between the back plate 22c covering the edges and the frame 22d for supporting them to the duct 30 on the machine. Has been.
[0078]
As shown in FIG. 5, the housing 22 is connected to the front end portion of the onboard duct 30 having a bifurcated shape via a back plate 22c. Each top plate 22a is provided with an inclined recess 22e that rises toward the coke oven C extending in the front-rear direction at the center in the width direction, and a cylinder device 25 is mounted on the inclined recess 22e.
[0079]
The upper flap 23 includes a flap body 23a that is formed in a “h” shape in a side view, and a bracket 23b that protrudes obliquely upward from the rear edge of the flap body 23a toward the rear. It is configured. The upper flap 23 is pivotally supported around a support shaft 26 extending in the horizontal direction in parallel with the coke oven row provided at the upper edge of the front end of the frame 22d, and a distal end portion of the upper flap 23. The posture can be changed between a contact posture in which the upper surface is in contact with the lower surface of the tip of the kiln hood 103 and a contact release posture in which the contact is released and the tip edge is inclined downward. Yes.
[0080]
5 illustrates the state in which the uppermost flap 23 at the leftmost end and the rightmost end is set in the contact release posture, and the two upper flaps 23 at the center are set in the contact posture. The state is illustrated.
[0081]
Such an upper flap 23 may have a width dimension shorter than a pitch of the coke oven C (a distance between center lines extending in the vertical direction of the adjacent backstay 101), or may be longer. The dimension may be set. In the example shown in FIG. 5, the width of the upper flap 23 is set to be the same as the pitch of the coke oven C, but the present invention is not limited to this. The width dimension can be appropriately set according to the situation, for example, the length dimension of the 1.5 pitch of the coke oven C.
[0082]
In the present embodiment, the lower flap 24 is set to have a width dimension substantially the same as the pitch of the coke oven C, and a front end of a frame 22d that supports the bottom plate 22b in a state corresponding to the kiln C2 of each carbonization chamber C1. It is fixed to the part. The lower flap 24 is formed so as to be lowered toward the coke oven C, and the front end thereof is opposed to a slightly upper position of the furnace lid 102 as shown in FIG. And, with the upper flap 23 set in the contact posture, the dust-containing hot air flow generated from the kiln C2 where the furnace lid 102 is opened is obliquely upward due to the specific gravity difference due to being heated against the outside air. Then, it passes between the lower flap 24 and the upper flap 23 through the kiln opening hood 103 as dust scattering prevention means, and is introduced into the onboard duct 30 through the housing 22.
[0083]
The cylinder device 25 includes a cylinder 25a attached to an inclined recess 22e provided in the top plate 22a of the housing 22 so as to extend in the front-rear direction, and a cylinder rod 25b protruding from the front end of the cylinder 25a. Yes. The rear end portion of the cylinder 25a is pivotally supported by a bracket 25c provided at the rear portion of the inclined concave portion 22e so as to be rotatable around the connecting shaft 25d, and the front end portion of the cylinder rod 25b protrudes from the upper flap 23. The bracket 23b is rotatably supported around the connecting shaft 23c.
[0084]
Accordingly, when the cylinder rod 25b is retracted by the driving of the cylinder device 25, the flap body 23a rotates clockwise around the support shaft 26 via the bracket 23b, and as shown by a solid line in FIG. The front end edge is set to a contact posture in contact with the lower end edge of the kiln hood 103, while the cylinder body 25b is retracted, whereby the flap body 23a is rotated around the support shaft 26 via the bracket 23b. Thus, as shown by a two-dot chain line in FIG. 6, the posture is set to a contact release posture in which the tip edge portion is first lowered.
[0085]
In FIG. 6, various work devices such as a furnace lid attaching / detaching machine 94 (FIG. 2) and a furnace lid cleaner are attached to a portion surrounded by a thick two-dot chain line, that is, a position below the dust collection hood 20. A so-called machine area M is set, and a wall surface formed by extending the back plate 22c downward is formed behind the machine area M, so that dust is discharged to the outside through the machine area M. There is nothing.
[0086]
FIG. 7 is an explanatory diagram for explaining the operation of the present invention. FIG. 7A is a diagram illustrating the upward flow of the dust-containing airflow from the coke oven C in a state where the upper flap 23 is set to the contact posture. (B) indicates that the upper flap 23 is in the contact posture, and the dust-containing airflow from the coke oven C is discharged in a substantially horizontal direction. (C) indicates that the upper flap 23 is Each of the states set to the contact release posture is shown.
[0087]
First, when dry distillation of the raw coal in the carbonization chamber C1 is completed, the furnace lid 102 is removed and the red hot coke is exposed to the outside (the second carbonization chamber C1 from the right in FIG. In this state, the dust from the carbonization chamber C1 rises in the work area Z1 of the kiln C2 along with the hot air flow S1, as shown in FIG. It is captured by the upper flap 23 through the kiln opening hood 103 and sucked into the on-machine duct 30.
[0088]
In contrast, when coal is being charged into the carbonization chamber C1, the small lid 106 is opened with the furnace lid 102 attached to the carbonization chamber C1 (the second carbonization chamber C1 from the left in FIG. 1 is opened). In this state, since the leveler 93 (FIG. 2) of the extruder 90 is inserted into the carbonization chamber C1 through the small lid port and reciprocates, a so-called leveling operation is performed. As shown in FIG. 7B, a raw gas stream S2 containing pulverized coal may be ejected from the mouth. The raw gas flow S2 is jetted in a straight line from the small lid opening obliquely upward. However, since the raw gas flow S2 is captured by the lower flap 24 and introduced into the dust collection hood 20, it is conventional. When the lower flap 24 is not present, the raw gas flow S2 directly hits the front side of the extruder 90, thereby reliably preventing the inconvenience that the working environment is deteriorated.
[0089]
In addition, since the lower flap 24 is provided in the dust collection hood 20, the lower flap 24 effectively prevents the outside air from entering the dust collection hood 20 from the machine region M side. By flowing into the dust collection hood 20, the disadvantage that the trapping efficiency of the hot air flow S1 and the raw gas flow S2 is reduced due to dilution action is avoided.
[0090]
When the extruder 90 is moved, the lower flap 24 in contact with the kiln opening hood 103 and in the contact posture indicated by the two-dot chain line in FIG. ), The posture is changed to the contact release posture as shown by the solid line in FIG. Thus, the extruder 90 can smoothly travel without the upper flap 23 interfering with the kiln hood 103.
[0091]
Further, by providing the upper flap 23 that can be changed between the contact posture and the contact release posture, for example, when the dust collector main body 50 is stopped due to a failure or the like, the upper flap 23 is put into the contact release posture. Since the outside air can be circulated in the work area Z1 by natural ventilation through the gap formed between the upper flap 23 and the kiln hood 103 by setting, the inside of the work area Z1 is not suitable for the work environment. It is possible to prevent an excessively high temperature and to effectively prevent thermal deterioration of equipment such as the furnace lid attaching / detaching machine 94 and the furnace lid cleaner.
[0092]
As described in detail above, the present invention captures and sucks in the dust collection hood 20 and collects dust discharged from the kiln C2 of each carbonization chamber C1 of the coke oven in which a plurality of carbonization chambers C1 are arranged in parallel. A dust collector 10 for a coke oven for dust treatment, and the dust collecting hood 20 is opposed to the kiln C2 of an extruder (work machine) 90 used when discharging coke from each carbonization chamber C1. Since the extruder 90 releases a large amount of dust, the coke K is discharged from the carbonization chamber C1 when the raw coal is charged into the carbonization chamber C1 or after the carbonization process is completed. The dust collection hood 20 is in a state of facing the kiln opening C2 of the carbonization chamber C1 in a state where the dust collection hood 20 has moved to the carbonization chamber C1 at a time, etc. The inconvenience of not being The dust can be captured by reliably dust collecting hood 20.
[0093]
Then, by setting the shape of the dust collection hood 20 so as to cover the upper and both sides of the work area Z1 in the kiln outlet C2, the kiln outlet C2 of the coke oven is a collector provided at a portion facing the kiln mouth C2. The dust discharged from the carbonization chamber C1 to the kiln C2 is covered with the dust hood 20, so that the side portion of the kiln C2 that is not covered at all compared to the conventional hood provided only at the upper part of the kiln C2. Inconvenience of escaping from the outside to the outside does not occur, and the dust collection hood 20 captures it more reliably.
[0094]
Further, a kiln hood 103 as dust scattering prevention means fixed to the coke oven C is disposed above the kiln C 2, whereby dust discharged from the carbonization chamber C 1 is placed on the short and high side walls 103. Since it is guided to the dust collecting hood 20, it is possible to almost completely eliminate dust discharge from the coke oven C 2.
[0095]
The dust collection hood 20 is configured to include an upper flap 23 that faces the kiln hood 103, and the upper flap 23 has an abutting posture in which the tip end is in contact with the kiln hood 103, and By making the posture changeable between the contact release posture released from the contact with the kiln hood 103, the extruder 90 is in the state of facing the kiln C2 of the carbonization chamber C1 to be worked. By setting the flap 23 to a contact posture, the tip of the upper flap 23 comes into contact with the kiln hood 103, whereby the dust collecting hood 20 is cooperated with the lower flap 24 via the kiln hood 103. Since the dust discharge area Z2 of the kiln opening C2 is completely surrounded, the dust discharged from the kiln opening C2 and rising along with the hot air current can be reliably captured by the dust collecting hood 20.
[0096]
And when the extruder 90 moves, since the contact with the kiln hood 103 of the upper flap 23 is canceled by changing the posture of the upper flap 23 to the contact release posture, the extruder 90 The flap 23 can move smoothly without interfering with the kiln hood 103.
[0097]
The present invention is not limited to the above embodiment, and includes the following contents.
[0098]
(1) In the above embodiment, the kiln dust collector 10 is provided in the extruder 90, but the present invention is limited to the kiln dust collector 10 being attached to the extruder 90. It may be provided in a guide vehicle that runs on the so-called coke side, which is the side where coke is pushed out.
[0099]
(2) In the above embodiment, the existing kiln hood 103 fixed on the coke oven C side is used as the dust scattering prevention means of the present invention. It may be used as a collecting means. By doing so, dust released from the opened kiln can be captured by both the kiln hood 103 and the dust collecting hood 20 according to the present invention. The dust discharge from the kiln can be effectively prevented.
[0100]
(3) In the above embodiment, the lower flap 24 is fixed to the frame 22d of the housing 22. However, the present invention is not limited to the lower flap 24 being fixed to the frame 22d. Like the flap 23, it may be rotatable around a horizontal axis, or may be slidable so that the amount of protrusion of the dust collection hood 20 from the bottom plate 22b can be adjusted. By doing so, it becomes possible to adjust the angle of the lower flap 24 according to the state of generation of dust from the kiln C2, and to change various amounts of protrusion of the lower flap 24 from the bottom plate 22b, which is more effective. It is possible to capture dust.
[0101]
(4) In the above embodiment, the kiln hood 103 and the collective duct 105 fixed to the coke oven C are provided above the kiln C2 of the coke oven C. And the installation of the collective duct 105 is not essential and may not be provided. In this case, kiln dust collection is performed only by the kiln dust collector 10 mounted on the extruder 90, but the generation of dust from the coke oven C is not so intense during dry distillation treatment, The kiln using the dust collecting hood 20 and the on-machine duct 30 mounted only when the extruder 90 or the guide wheel is operated can be avoided by sufficiently cleaning the furnace lid 102. Even if the dust is collected in the mouth, it is possible to sufficiently prevent the dust from scattering to the outside air.
[0102]
(5) In the above embodiment, the existing kiln hood 103 is employed as the dust scattering prevention means according to the present invention. However, in the present invention, the dust scattering preventing means is the existing kiln mouth hood 103. However, the present invention is not limited thereto, and dedicated dust scattering prevention means may be provided. As a dedicated dust scattering prevention means, a dust guide plate constructed between the backstays 101 above the kiln outlet C2 can be cited. In this case, the size of the dust guide plate is set so that the front edge of the dust guide plate comes into contact with the tip of the dust guide plate in a state where the upper flap 23 is set in the contact posture.
[0103]
(6) In the above-described embodiment, the cylinder body 25 is moved forward by the forward drive of the cylinder device 25, whereby the flap body 23 a is set in the contact release posture separated from the kiln hood 103, while the cylinder device 25. By reversing the cylinder rod 25b by reverse driving, the posture of the flap body 23a is set to a contact posture in contact with the kiln hood 103. Instead of this, the tip of the cylinder rod 25b is set. When the cylinder rod 25b is moved forward, the flap body 23a is brought into contact with the kiln hood 103 while the cylinder rod 25b is retracted. You may make it cancel | release the contact with respect to.
[0104]
(7) The kiln dust collecting apparatus 10 of the present invention is characterized in that the dust collecting hood 20 equipped with the extruder 90 intended for the kiln C2 of the coke oven C first has a feature. In addition, it is also characterized as a kiln dust collection system. When the kiln dust collector 10 of the present invention is viewed as a kiln dust collection system, the on-machine duct 30 mounted on the extruder 90, the joint duct 40 to which the on-machine duct 30 is connected, If the dust collector main body 50 to which the dust-containing gas G from the onboard duct 30 is supplied via the joint duct 40 is provided, the dust collection hood 20 is not particularly adapted to the above-described embodiment. However, it will be completed as a kiln dust collection system.
[0105]
In the above-described embodiment, the joint duct 40 provided with the standing partition plate 49 is used. However, the present invention is limited to the joint duct 40 having the standing partition plate 49. Instead of this, a water-sealed joint duct in which the standing partition plate 49 does not exist may be adopted. Further, the on-machine duct 30 and the dust collector main body 50 may be connected by a flexible tube instead of the joint duct as described above.
[0106]
【The invention's effect】
According to the kiln opening dust collector of claim 1, since the dust collecting hood is provided in a portion facing the kiln opening of the working machine used when discharging coke from each carbonization chamber, the working machine is The dust collection hood faces the kiln entrance of the carbonization chamber in a state where it has been moved to the carbonization chamber of the work target that emits a large amount of dust, and this can ensure that a large amount of dust is captured by the dust collection hood. it can. Therefore, the conventional fixed-type furnace-side hood cannot cope with the dust frequent occurrence timing, and the inconvenience that a reliable dust generation preventing effect cannot be obtained is solved.
[0107]
Then, by setting the shape of the dust collection hood so that it can cover the upper part, both sides and the lower part of the dust discharge area in the kiln mouth, the kiln mouth of the coke oven is covered with the dust collecting hood. Dust released from the dust discharge area does not cause the inconvenience of escaping to the outside from the side or lower part of the kiln entrance where dust is not covered at all, compared to the conventional case where the hood is provided only at the upper part of the kiln opening. , Dust collection efficiency can be improved.
[0108]
  Also, aboveAccording to the kiln dust collector, an on-machine duct that is disposed in a work machine used when discharging coke from each carbonization chamber and sucks dust together with an air flow, and a connecting duct to which the on-machine duct is connected And a stationary dust collector main body connected to the connection duct, the dust generated at the coke oven's kiln is trapped and sucked by the on-machine duct along with the air flow, and is passed through the connection duct. The dust collector can be collected by the main body of the dust collector.
[0109]
And since the dust collector body is stationary, it is a large one with excellent dust collection capacity without being affected by the restrictions on the machine as compared to the case where the dust collector is installed on the machine. The dust generated at the coke oven can be collected and collected more reliably.
[Brief description of the drawings]
FIG. 1 is a front view of a coke oven as viewed from a machine side (side on which an extruder is disposed).
FIG. 2 is a schematic side view of an extruder for explaining an embodiment of a kiln dust collector according to the present invention.
FIG. 3 is a schematic plan view of the kiln dust collector shown in FIG.
FIG. 4 is a perspective view showing an embodiment of a joint duct.
FIG. 5 is a schematic perspective view showing an embodiment of a dust collection hood according to the present invention.
6 is a side view of the dust collection hood shown in FIG.
7A and 7B are explanatory diagrams for explaining the operation of the present invention. FIG. 7A is an upward flow of dust-containing airflow from the coke oven in a state where the upper flap is set in a contact posture. In the case (b), when the dust-laden airflow from the coke oven is released in a substantially horizontal direction with the upper flap in the contact posture, (c), the upper flap is in the contact release posture. Each state in which the posture is set is shown.
FIG. 8 is a perspective view showing an example of a conventional kiln dust collector.
[Explanation of symbols]
10 Kiln entrance dust collector 20 Dust collection hood
21 Side shielding cover 22 Housing
22a Top plate 22b Bottom plate
22c Back plate 22d Frame
22e Inclined recess 23 Upper flap
23a Flap body 23b Bracket
23c Connecting shaft 24 Lower flap (lower cover plate)
25 Cylinder device 25a Cylinder
25b Cylinder rod 25c Bracket
25d connecting shaft 26 supporting shaft
30 On-machine duct 31 Duct body
32 U-shaped duct 33 Base end
34 Intermediate part 35 Tip part
36 Draining projection 40 Joint duct
40a Liquid filling chamber 40b Dust accumulation chamber
41 Long container 42 Bottom plate
43 Short high side wall 44 Long high side wall
45 End wall 46 Lid member
47 Top plate 48 Hanging partition plate
49 Standing partition plate 50 Dust collector body
51 Suction blower 52 Bag filter
90 Extruder 91 Extruder body
92 Extrusion ram 92a Ram body
92b Ram head 92c Pinion
93 Leveler 94 Furnace Detachment Machine
101 Backstay 102 Furnace lid
103 Kiln mouth hood (Dust scattering prevention means)
104 Connection duct 104a Open / close damper
105 Collecting duct 106 Small lid
107 Service Home 109 Climb Pipe
110 Collecting Main C Coke Oven
C1 carbonization chamber C2 kiln entrance
C3 rail G dust-containing gas
K coke S1 thermal airflow
S2 Raw gas flow X Dust collector for furnace side hood
Z1 Work area Z2 Dust release area

Claims (4)

  The above-mentioned working machines such as an extruder and a guide car used when discharging coke from each carbonization chamber to discharge dust from each carbonization chamber of a coke oven in which a plurality of carbonization chambers are arranged in parallel. A dust collector for a coke oven that captures and sucks and collects dust with a dust hood provided in a portion facing the kiln, and the dust collecting hood is connected to the outside of the dust discharged from the kiln. In order to prevent the dust from being scattered, the dust discharge area at the furnace outlet is covered from the top with the furnace hood or dust guide plate that is fixed to the coke oven at the upper position of the furnace outlet and guides the dust emitted from the furnace outlet. The portion facing the kiln hood or the dust guide plate is an upper flap, and the upper flap is in contact with the tip of the kiln hood or the dust guide plate. And the contact release form in which the contact is released Coke oven kiln inlet dust collecting apparatus characterized by being posture capable of changing between.   2. The coke oven according to claim 1, wherein the dust collection hood further includes a lower cover plate capable of covering a lower portion of the dust discharge region at the kiln, and configured to be able to introduce dust between the upper flap and the lower cover plate. Kiln entrance dust collector.   The coke oven according to claim 1 or 2, wherein the upper flap is configured so that a tip end thereof comes into contact with an end edge portion of a kiln hood or a tip end portion of a dust guide plate by rotating around a horizontal axis. Kiln entrance dust collector.   The above-mentioned working machines such as an extruder and a guide car used when discharging coke from each carbonization chamber to discharge dust from each carbonization chamber of a coke oven in which a plurality of carbonization chambers are arranged in parallel. A coke oven kiln mouth that is provided in a portion facing the kiln mouth and is collected by sucking and sucking with a dust collecting hood configured to cover the upper and both sides of the dust discharge area in the kiln mouth. A dust collector, wherein the dust hood includes a housing that forms a suction passage through which dust can be introduced, and a lower edge of the housing so as to cover a lower portion of the dust discharge area at the kiln. A dust collector for a coke oven, comprising a lower cover plate projecting from the portion toward the lower part of the dust discharge region.

Images