EP0452428B1 - Device for preventing gases from escaping from horizontal coking chambers when coal cakes are fed in - Google Patents

Abstract

Disclosed is a device for preventing gases from escaping when coal cakes (15) are fed into horizontal coking chambers (20), the coal cakes being produced outside the coking chamber (20) in a mould by a tamping, feed and pusher machine (1) and standing on the movable floor (14) of the mould. The device is designed as a channel (3) which surrounds the coal bakes (15) being fed in. The channel end wall nearest the oven abuts the frame (2) of the coking-chamber door. The device is characterized by the fact that the side walls (10) of the channel (3) can be inserted into the side walls of the mould which are hollow in the zone nearest the oven. In addition, the channel floor is formed by the movable floor (14) of the mould and the channel roof (9) is telescopic and has guides for the movable side walls (10). Located on the stationary part of the channel roof (9) is a levelling device (8) which levels the surface of the coal cake (15) and has a disposal device for the coal thus stripped off.

Description

The invention relates to a device for preventing the escape of filling gases during the retraction of coal cakes made in a ramming mold of a ramming, feeding and squeezing machine outside of the coking chamber and standing on the movable ramming base of the ramming mold in horizontal coking chambers, the device being a retracting device Coal cake enveloping channel and formed with the furnace-side end face on the door frame of the coking chamber.

From DE 28 21 169 a sealing frame enveloping the oven opening and the retracting ramming cake is known, which can be placed in front of the head of the cake to be retracted via a swivel arm from a position laterally next to the ramming mold. The swivel arm in turn is arranged on a carriage which can be moved parallel to the furnace axis, so that it can be moved up to the furnace opening. This known frame does not bridge the entire space between the coking chamber and the tamping mold. Rather, the sealing on the tamping mold side takes place by means of elastic sealing elements which are arranged on the sealing frame and lie directly on the retracting coal cake.

In practice it has been shown that these sealing elements lying directly on the coal cake have major disadvantages and lead to malfunctions, firstly as a result of the relative movement between the coal cake and the sealing element, but also because of the very high operating temperature caused by their position immediately in front of the open coking chamber Embrittlement of the sealing elements leads.

A further disadvantage of the sealing elements lying tightly against the coal cake is that in cases where the coal cake sticks and can therefore only be partially inserted, the residual cake is not disposed of, i.e. can be driven back into the ramming device. When the coal cake moves back against the setting direction for which the friction seal is designed, there is a build-up of coal at the friction seal, since the coal cake is deformed by the sticking in the coking chamber and no longer forms an exact cuboid.

This known device is very expensive to construct. In addition, the arrangement of the swung-back and retracted sealing frame next to the ramming mold leads to major space problems, since other elements such as the movable front door of the ramming mold, the jack bracket, the movable lifting device for the coke chamber door and the door frame cleaning device are arranged on both sides of the ramming mold.

In DE 29 43 319 it has therefore already been proposed to arrange the sealing frame directly in front of the stamping mold door, a stationary frame being fastened in front of the stamping mold, while the actual cover frame can be swung forward and downward via a parallelogram guide. Apart from the fact that the seal here takes place directly at the incoming coal cake, the distance between the anchor stands of the coking chamber and the ramming, loading and squeezing machine, the so-called SBA machine, the master cycle is greatly narrowed, in particular by the stationary part of the device. In order to rule out any danger to the operating personnel when moving the SBA machine, a sufficiently wide passage must be ensured, which must additionally be secured by a railing. On the other hand, efforts are made to keep the total distance between the coking chamber and tamping mold, that is to say the distance that the coal cake has to be moved free-standing, to be as small as possible.

The object of the present invention is to create a simple functional device for preventing the escape of filling gases when coal cakes are inserted into horizontal coking chambers, which avoids these disadvantages.

In a device of the type mentioned, this object is achieved according to the invention in that the side walls of the channel can be moved into the side walls of the ram mold, which are formed as hollow walls in the furnace-side area, that the channel floor is formed by the movable ramming floor and that the channel cover is designed to be telescopic and Has guides for the displaceable side walls, a leveling device smoothing the surface of the coal cake with a disposal device for the scraper coal being arranged on the stationary part of the manhole cover.

Advantageously, between the side walls of the channel and the telescopic manhole cover, forced entrainment, for example spring-loaded friction surfaces, are provided for retracting and extending the telescopic part together with the side walls of the channel, so that there is no need for a separate drive for the manhole cover.

The side walls of the channel can be coupled directly to the movable ramming floor or the ramming floor drive, so that a separate drive can also be omitted here.

If there is a tamped floor support, which is extended before the coal cake is retracted and rests on a console on the furnace chamber, the side walls are advantageously extended coupled to the tamped floor support. This arrangement has the advantage that the channel side walls and with them the channel cover are already extended and rest on the door frame of the coking chamber before the coal cake itself is placed. As a result, the filling gases that are created when the cake head approaches the hot coking chamber, also supported by the chimney effect, are safely disposed of.

The filling gases can be disposed of in a known manner via a gas outlet arranged in the ceiling of the coking chamber and a gas manifold installed above the coke oven battery into a gas treatment system. If the extracted filling gases are burned in a filling gas combustion car that can be moved on the coke oven battery or by transferring them to an adjacent occupied coking chamber, the channel surrounding the incoming coal cake has the further advantage, in addition to the prevention of emissions, that air is not also sucked in uncontrollably through the opened coking chamber with the filling gases , which greatly affects the ignition behavior of the filling gases and can prevent optimal combustion of the filling gases. By sealing the incoming coal cake, the amount of combustion air supplied can be regulated specifically according to the real need.

In the device according to the invention, no friction seals lying against the retracting coal cake are required. The lateral sealing takes place here by means of sealing strips arranged inside the tamping mold side walls and lying against the channel side walls.
The downward sealing is provided by the tamped bottom. At the cake surface, the sealing takes place by means of the carbon bead formed by the coal stripped off the leveling device.

For sealing against the door frame of the coking chamber, spring-loaded cutting strips are expediently provided, which can also consist of cutting strip segments which can adapt to any unevenness in the door frame.

In the retracted position, the space between the coking chamber and the SBA machine and next to the SBA machine is not impaired in any way by the device according to the invention. The telescopic manhole cover is in the closed state above the master course in front of the pounding mold, but depending on the cake height at a height of approx. 4-6 m, so that there is no impairment here.

To monitor the setting process, a pressure probe can be provided on the manhole cover, which switches off the setting process when the coal cake to be set is blocked under the effect of the pressure exerted by the accumulating coal.

According to a further embodiment of the device according to the invention, an additional gas vent can be provided on the channel. This gas outlet can be connected to the gas manifold which is installed in a stationary manner above the ceiling of the coke oven battery or can be connected to a combustion chamber which is arranged on the SBA machine and can be moved with it.

• Fig. 1 : eine Seitenansicht eines Kanales in eingefahrener Position
• Fig. 2 : eine Seitenansicht eines Kanales in ausgefahrener Position
• Fig. 3 : Beispiel einer verfahrbaren Ankopplung einer Gasabsaugung
• Fig. 4 : eine Vorderansicht eines Kanales in eingefahrener Position
• Fig. 5 : Ankoppelung der Kanalseitenwände an die Stampfbodenunterstützung in eingefahrener Position
• Fig. 6 : Ankoppelung der Kanalseitenwände an die Stampfbodenunterstützung in ausgefahrener Position
• Fig. 7 : eine Draufsicht eines Kanaldeckels in ausgefahrener Position mit Nivelliervorrichtung und gebilddetem Kohlewulst
• Fig. 8 : Anlage eines ausgefahrenen Kanaldeckels am Türrahmen der Verkokungskammer
• Fig. 9 : Vorderansicht mit Anordnung der Kanalseitenwände in den Kammern der Stampfformseitenwände
• Fig. 10 : Einzelheit entsprechend Schnitt IV-IV der Fig.9
• Fig. 11 : Anlage der Kanalseitenwände am Türrahmen einer Verkokungskammer
• Fig. 12 : Kopplung der Kanalseitenwände mit dem Stampfboden bei Mitnahme des Kanales durch den Stampfboden
• Fig. 13 : Einzelheit entsprechend Schnitt III-III der Fig.12
• Fig. 14 : Einzelheit entsprechend Schnitt I-I der Fig. 7
• Fig. 15 : Einzelheit entsprechend Schnitt II-II der Fig. 8

The invention is explained with reference to the embodiment shown in Figures 1 to 15.
Show it

• Fig. 1: a side view of a channel in the retracted position
• Fig. 2: a side view of a channel in the extended position
• Fig. 3: Example of a movable coupling of a gas extraction
• Fig. 4: a front view of a channel in the retracted position
• Fig. 5: Coupling the channel side walls to the ramming floor support in the retracted position
• Fig. 6: Coupling the channel side walls to the ramming floor support in the extended position
• 7: a top view of a manhole cover in the extended position with leveling device and formed carbon bead
• Fig. 8: System of an extended manhole cover on the door frame of the coking chamber
• Fig. 9: Front view with arrangement of the channel side walls in the chambers of the tamping side walls
• Fig. 10: Detail according to section IV-IV of Fig.9
• Fig. 11: Installation of the channel side walls on the door frame of a coking chamber
• Fig. 12: Coupling the channel side walls with the ramming floor when the channel is carried along by the ramming floor
• Fig. 13: Detail according to section III-III of Fig.12
• 14: Detail according to section II of FIG. 7
• 15: Detail according to section II-II of FIG. 8

A device for preventing the escape of filling gases during the retraction of a in a ramming device 1 Coal cake 15 produced outside the coking chamber 20 and standing on the movable tamping base 14 of the tamping mold consists of a channel 3 bridging the distance between the coking chamber 20 and the SBA machine 1, which completely surrounds the incoming coal cake 15.

To support the filling gas suction connected to the coking chamber 20 itself, the filling gases retained in the channel 3 can be disposed of via a separate gas suction 5 which can be coupled to the channel 3 via a closable connection 25, which, as shown in the example in FIGS. 1 and 2, via connections 6 can be coupled to a gas collecting line 7, the so-called gas receiver, laid above the coke oven battery. Instead of stationary connections 6 above each coking chamber 20, as shown in FIG. 3, a movable gas connection 19 can also be provided. However, it may also be expedient not to discharge the filling gases extracted from the duct 3 together with the full gases extracted from the coking chambers 20 via the gas receiver 7, but to dispose of them in a separate combustion chamber provided on the SBA machine 1.

The duct 3 consists of the movable segments duct cover 9, side walls 10 and ramming base 14, which form a unit, in the extended state, a duct.

To move the SBA machine 1, the channel 3 must be moved back sufficiently far so that there is a sufficiently wide passage between the anchor stands 26 of the coke oven battery and the SBA machine 1 for the safety of the operating personnel. For this purpose, in the device according to the invention, the side walls 10 of the channel 3 can be moved into the side walls 4 of the ramming mold, which are formed as hollow walls in this area. The manhole cover 9 is telescopic and is in the retracted state above the tamped molding door 21 at a height of approx. 4 to 6 m above the master aisle 23. The retracted channel 3 does not in any way impair the movable tamping molding door 21, the jack bracket lock 22 and the movable door lifting and door frame cleaning device for the coke chamber door (Fig. 4).

The side walls 10 of the channel 3 are coupled to the ramming floor support 12 and can thus be moved in and out together with the latter (FIGS. 5, 6, 9, 10). If no ramming floor support 12 is provided, the side walls 10 of the channel 3 can also, e.g. can be coupled to the movable ramming base 14 via driver rollers 13 (FIGS. 12, 13).

The telescopic manhole cover 9 is U-shaped. It consists of a narrower stationary part 32 and a wider telescopic part 31. The lateral gap 29 resulting from this on both sides serves as a guide for the movable side walls 10 of the channel 3. When the side walls 10 of the channel 3 are extended, the telescopic part 31 of the channel cover 9 is also pushed out via forced entrainment means 16 arranged in the columns 29. In the example in FIG. 14, the forced entrainments 16 are designed as spring-loaded friction elements. If the manhole cover 9 is in contact with the door frame 2, the side walls 10 continue overcoming the frictional forces of the positive entrainment 16 to a stop 27 arranged at the front end of the manhole cover 9, so that it is ensured that the manhole cover 9 seals with sufficient pretension on the door frame 2 .

The side walls 10 of the channel 3 are moved in the side walls 4 of the tamping mold with rollers on rails and guided over sliding guides 30. The small gap between the side walls 10 of the channel 3 and the side walls 4 of the Tamping molds are sealed with adjustable strips. The sealing of the channel 3 against the door frame 2 of the coking chamber 20 and the side walls 10 against the ramming floor 14 is carried out via spring-loaded cutting strips 11, which are divided into segments 17.

The surface of the incoming coal cake 15 is smoothed by a leveling device 8 attached to the manhole cover 9. The sealing on the top of the cake is carried out by the carbon bead 18 that forms. Excess, stripped coal is disposed of via a pipeline 28.

If the coal cake 15 is stuck and can no longer be set, the setting process is interrupted by the pressure acting on the pressure probe 24 due to the coal accumulating in the channel 3.

To set a mashed coal cake 15, a side wall 4 of the ramming mold must be displaceable by a few millimeters so that the coal cake 15 is relaxed. The side wall 10 of the channel 3 arranged in the movable side wall 4 of the ramming mold thus comes to stand in front of the gap 29 of the correspondingly coordinated channel cover 9. On the side of the side wall 4 of the ramming mold fixedly mounted on the SBA machine 1, the corresponding side wall 10 of the channel 3 in the upper region with a guide lug 33 is constantly in engagement with the gap 29 of the channel cover 9.

Legend

• 1 SBA machine
• 2 door frames
• 3 channel
• 4 ramming mold walls
• 5 gas vent
• 6 gas connection
• 7 gas manifold
• 8 leveling device
• 9 manhole cover
• 10 channel side walls
• 11 sealing strips
• 12 ramming floor support
• 13 carrier rollers
• 14 rammed floor
• 15 coal cakes
• 16 Forced transportation
• 17 sealing strip segments
• 18 carbon bead
• 19 Movable gas connection
• 20 coking chamber
• 21 ramming door
• 22 Jack stand lock
• 23 master course
• 24 pressure probe
• 25 Closure of the gas exhaust
• 26 anchor stands
• 27 Stop on the manhole cover
• 28 Pipe for scraper coal
• 29 guide gap
• 30 leadership
• 31 Telescopic part of the manhole cover
• 32 Stationary part of the manhole cover
• 33 guide nose

Claims (9)

1. A device for preventing the escape of filler gases during the introduction of coal cakes, produced in a stamping mould of a stamping-, feeding- and ejection machine outside of the coking chamber and arranged on the transportable stamping base of the stamping mould, into horizontal coking chambers, wherein the device has the form of a channel which encases the incoming coal cake and at its front end, on the side of the furnace, abuts against the door frame of the coking chamber, characterised in that the side walls (10) of the channel (3) can be introduced into the side walls (4) of the stamping mould, which have the form of hollow walls in the region on the side of the furnace, that the channel base is formed by the transportable stamping base (14) and that the channel cover (19) is designed to be telescopic and comprises guides (29) for the displaceable side walls (10), where a levelling device (8), which smooths the surface of the coal cake (15), with a disposal device for the stripped-off coal, is arranged on the stationary part (32) of the channel cover (9).
2. A device as claimed in Claim 1, characterised in that the side walls (10) are coupled to a stamping base support (12) and can be retracted and extended together with the latter.
3. A device as claimed in Claim 1 or 2, characterised in that automatic entrainment means (16) are disposed between the side walls (10) of the channel (3) and the telescopic channel cover (9), which entrainment means (16) serve to retract and extend the telescopic part of the channel cover (9) jointly with the side walls (10).
4. A device as claimed in one of Claims 1 to 3, characterised in that spring-loaded cutting strips (11) are arranged in the form of a seal between the channel (3) and the door frame (2) of the coking chamber (20).
5. A device as claimed in one of Claims 1 to 4, characterised in that the cutting strips (11) are formed by segments (17).
6. A device as claimed in one of Claims 1 to 5, characterised in that a pressure head (24) is arranged in the channel (3) in the region of the channel cover (9).
7. A device as claimed in one of Claims 1 to 6, characterised in that a gas vent (5) is provided in the channel (3).
8. A device as claimed in Claim 7, characterised in that the gas vent (5) can be connected to a gas collector pipeline (7) installed above the lid of the coke oven battery.
9. A device as claimed in Claim 7, characterised in that the gas vent (5) is connected to a combustion chamber arranged on the stamping-, feeding- and ejection machine (1).

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