KR20080046200A - Cleaning device for cleaning oven doors of a coking chamber of a coke oven - Google Patents

Abstract

The invention relates to a cleaning device (1) for cleaning an oven door (2) of a coking chamber of a coke oven, the oven door (2) having a door plug (3) and at least one outer peripheral knife-edge seal (4), with a mechanical abrasive device (5) for the abrasive cleaning of a door-plug region and a high-pressure cleaning device (7), having nozzles (6), for the high-pressure cleaning of at least the knife-edge seal region (10). In order to provide simple and low-cost cleaning in which the knife-edge seal region is stressed as little as possible, it is provided according to the invention that the high-pressure cleaning device (7) has rotating nozzles for cleaning the knife-edge seal region (10).

Description

CLEANING DEVICE FOR CLEANING OVEN DOORS OF A COKING CHAMBER OF A COKE OVEN}

The present invention relates to a cleaning apparatus for cleaning an oven door of a coking chamber of a coke oven according to the preamble of claim 1.

During coking, the components present in the coke oven gas are attached to the interior of the oven door of the coking chamber. In order to properly seal the oven door during the coking process, cleaning of the oven door is necessary. The use of mechanical polishing devices such as scrapers, strippers, blades, scratchers or milling-cutters for cleaning oven doors is known in the prior art. However, these mechanical grinders are usually only used for cleaning door-plugs. The grinders are not suitable for cleaning relatively sensitive knife-edge seal regions.

Another possibility for cleaning the oven door is to use a high pressure washing apparatus, in particular where water is applied to the area to be cleaned through nozzles. The use of this kind of high pressure device for cleaning both door plugs and knife edge seal areas is known as prior art. However, the drawback of the device is that only high pressure washing involves a relatively large amount of water and not only consumes a large amount of water, but also increases the risk of an accident, especially if the water freezes in winter. Another major drawback of high pressure cleaning is that there is a risk of damage to the knife edge seal area because high pressure is involved. A requirement for effective high pressure cleaning of the knife edge seal area is the water jet from the nozzle at a suitable high pressure. The higher the pressure, the better the cleaning effect will be. However, if the cleaning medium is too high pressure the knife edge seal will be damaged during cleaning. At very high pressures, especially when the sliding carriage stays in the same position for a short time, the knife edge seal is subjected to a non-temporal pressure load, which creates the risk of damage to the knife edge seal.

It is known from the German patent publication 31 44 222 A1 that the water consumption can be reduced by the use of a cleaning device, which is a common type in which high pressure devices as well as mechanical polishing devices are used. The prior art cleaning device has two sliding carriages, one on each side of the support frame; On each cleaning device not only conical milling cutters but also nozzle-holders are provided. On each nozzle holder there are two nozzles for high pressure water for cleaning the knife edge seal area.

The prior art cleaning apparatus has several disadvantages. Since only two, relatively small sliding carriages are used, the door cleaning takes a relatively long time. Furthermore, due to the high pressure cleaning, the problems mentioned above also arise in the knife edge seal area for this prior art device.

It is an object of the present invention to solve the above disadvantages arising from the prior art.

In order to achieve the above object, according to the present invention, it is provided that the high pressure cleaning device has a rotating nozzle for cleaning a knife-edge seal region. The present invention brings several important advantages. One of the important advantages of the present invention is the fact that the use of rotating high pressure nozzles produces good cleaning results in the knife edge seal area. Due to the rotating nozzle, it is possible to operate at very high pressures; The fact that the nozzle rotates means that no high pressure jets are continuously applied to a particular location. Finally, the rotating high pressure nozzles have a mild effect on the knife edge seal of the oven door, because unlike the fixedly mounted flat nozzle or round nozzle, the same pressure This is because there is no cutting effect at least, or at least significantly reduced. This significantly reduces the risk of damage to the knife edge seal due to high pressure medium, especially when the high pressure cleaning device stays in the same position for a while during the cleaning operation.

In addition, the cleaning apparatus of the present invention provides the advantage of low water consumption, since the area cleaned by the mechanical polishing apparatus does not need to be additionally cleaned by the high pressure washing apparatus. With low water consumption, the cleaning apparatus of the present invention is also more environmentally friendly and also reduces the risk of an accident, because less water is involved and thus less freezes in winter.

In connection with the present invention, it has been demonstrated that for a rotating high pressure nozzle the cleaning medium can be ejected at a pressure of at least 50 bar. Preferably, the wash medium is ejected at a pressure between 100 bar and 400 bar. At this pressure, damage to the knife edge seal is not expected with the use of a high pressure nozzle, and an excellent cleaning effect is achieved in the knife edge seal area.

In order to achieve a good cleaning effect in the knife edge seal area while reducing the risk of damage to the knife edge seal, the rotating high pressure nozzle should preferably rotate above 500 rpm, preferably between 1000 rpm and 4500 rpm.

In connection with the present invention, it is suitable to use a high pressure cleaning device for cleaning not only the knife edge seal area but also the door area between the knife edge seal and the door-plug; It is also possible to clean at least part of the door plug adjacent the door area with a high pressure cleaning device. This applies in particular to door plugs having two or more side surfaces rather than just one.

With regard to the use of a high pressure washing apparatus for cleaning the door area and the part of the door plug adjacent to the door area mentioned above, according to the invention, the nozzle according to the invention used in this area is a fixed nozzle or a rotating nozzle. Can be designed. At the same pressure, there is no problem with the use of fixed nozzles in this area since the risk of damage to the door area or part of the door plug is significantly less than the risk of damage to the knife edge seal.

As already explained, the cleaning apparatus of the present invention includes a mechanical polishing apparatus. The polishing apparatus may comprise at least one mechanical polishing means, known in the art, such as a scraper, stripper, blade, scratcher, and / or milling cutter. Since the polishing means acts directly on the door plug during cleaning, the polishing means are spring-loaded to prevent damage to the door plug and / or the polishing means.

In order to facilitate the cleaning of the door, the support frame is provided with at least one cleaning carriage with nozzles and / or polishing device, which cleaning carriage is mounted on the support frame. Guided and mobile at In this regard, the nozzles and / or the polishing apparatus are preferably provided on the same cleaning carriage. The cleaning carriage should preferably be designed such that both longitudinal sides of the oven door can be cleaned; Thus nozzles and polishing means of the polishing apparatus are provided on both sides. For cleaning purposes, the cleaning carriage should be moved at a speed of at least 20 mm / sec, preferably at a speed of 25 to 125 mm / sec.

In this regard, unlike prior art cleaning carriages, it is particularly advantageous if the cleaning carriage does not only reach a small part of the door height, but rather the length of the cleaning-span is slightly longer than half the height of the oven door. Further, the polishing means of the polishing apparatus and the nozzles of the high pressure cleaning apparatus should preferably be provided only at the upper end region and the lower end region of the cleaning span of each cleaning carriage, ie the top and bottom of the cleaning span. The advantage of this design is that only a very small number of grinding means and nozzles are needed to properly clean the longitudinal sides of the oven door. If the cleaning carriage is located in the lower position, for example as the starting position, the lower half will be cleaned by the wear means provided on the lower end region as the cleaning carriage is raised. At the same time, the upper area of the oven door will be cleaned as the cleaning carriage is raised by the cleaning means provided at the upper end of the cleaning span.

Furthermore, although it is particularly preferred that a rotating high pressure nozzle is used, the concept of the invention is of itself important, irrespective of the rotating high pressure nozzle.

In connection with the present invention, one polishing means—preferably blades, in particular spring loaded blades—and two to four nozzles in the upper region, and the provision of the same polishing means and nozzles in the lower region, Proved to be sufficient. By using such a small number of nozzles, the corresponding high pressure generator or pump can be made smaller in size.

In this regard, it is advantageous if the nozzles of the upper end region and / or the lower end region, and / or the nozzles of one end region can be adjusted separately from one another. This design makes it possible to first operate only the nozzles of the lower end region, for example, during the movement of the cleaning carriage, as a result of which only the lower half of the knife edge seal region will be cleaned. On the other hand, when the cleaning carriage is raised, the door plug area will be completely cleaned mechanically by mechanical polishing means. When the cleaning carriage is lowered, the nozzles of the upper end region will be activated, and as a result of this, the upper knife edge seal region will also be cleaned when the cleaning carriage is lowered. In this way, it is possible to clean and clean the outer door plug area several times with a mechanical polishing device, while at the same time the knife edge seal area is cleaned by only one high pressure nozzle, which achieves good cleaning results. Is enough. The final result is: optimal cleaning with reduced water consumption.

The aforementioned means enable longitudinal cleaning to be carried out on the oven door. In order to also clean the upper end surface and the lower end surface of the oven door and the door plug, at least one nozzle of the high pressure washing apparatus is provided in the upper and lower door plug areas and / or the knife edge seal areas. In this case also, a rotating high pressure nozzle should be used. Since the upper and lower end regions are relatively short, the region can be cleaned entirely by high pressure washing, including the knife edge seal region, in which the amount of water required to clean the relatively narrow upper and bottom end surfaces is reduced. This is because it is relatively small.

In principle it is possible to clean the upper and lower end regions of the oven door by means of fixedly mounted nozzles. However, in this case, the number of nozzles required is relatively large, and a pump of a relatively large scale is required. It is therefore advantageous to provide another carriage, having at least one and preferably two nozzles, transversely movable on the support frame for lateral cleaning.

In order to provide protection against spraying, the support frame is at least partly surrounded by a housing. The housing preferably includes a side protective cover that extends to all the paths of the support frame.

The cleaning apparatus of the present invention may be installed as a fixture fixed on a coke oven or may be provided on a coke-oven servicing machine. Accordingly, the present invention relates to both coke oven machines and coke ovens each equipped with a cleaning device of the kind described above.

Finally, the present invention relates to a method for cleaning an oven door of a coking chamber of a coke oven, which is cleaned because the length of the cleaning span in relation to the cleaning span is slightly longer than half the height of the oven door as described above. This results in a slight overlap of the regions.

1 is a schematic side view of a cleaning device with a cleaning carriage in a first, upper position according to the invention;

FIG. 2 is a view corresponding to the cleaning device of FIG. 1 with a cleaning carriage in a second, lower position; FIG. And

3 is a schematic cross-sectional view of the cleaning apparatus of the present invention showing a part of the mechanical polishing apparatus and a part of the high pressure cleaning apparatus.

Embodiments of the present invention are described with reference to the following drawings:

Each figure shows a cleaning device 1 for cleaning the oven door 2 of a coking chamber (not shown) of a coke oven. The oven door 2 has a door plug 3 and at least one outer, peripheral knife edge seal 4. The door plug 3 is generally a stoneware plug. With the cleaning device 1, combined door cleaning is possible. Combined door cleaning is achieved using a mechanical polishing apparatus 5 for abrasive cleaning and using a high pressure cleaning apparatus 7 with nozzles 6 for high pressure cleaning. A mechanical polishing device is provided for cleaning the door plug area, ie the side surface 8, while the nozzles 6 are provided for cleaning at least the knife edge seal area 4. Of course, the high pressure cleaning device 7 also includes a high pressure line 10 and a pump device or a pressure generator (not shown in detail) apart from having the nozzles 6.

According to the invention, the high pressure cleaning device 7 has rotating nozzles 6 for cleaning the knife edge seal area 10. At a pressure of about 150 bar, the water provided as the cleaning medium is ejected by the nozzles 6 rotating at 3000 to 3500 revolutions per minute.

In addition to the nozzle 6 provided for cleaning the knife edge seal area, the door area 12 between the knife edge seal 4 and the door plug 6 and the door plug 13 next to the door area 12 Additional nozzles 6 are also provided for cleaning a portion of the. In the embodiment described, the door plug 3 has side surfaces consisting of two individual surfaces each angled with respect to each other. In such a case, only the outer side surface 8 is suitable for cleaning with the mechanical polishing device 5, and the other surface 13 at an angle with the surface is suitable for cleaning with the nozzles 6. . In particular, the nozzles 6 for cleaning the door plug surface 13 can be designed as essentially fixed, i.e., non-rotating, nozzles, since the risk of damage to the door plug by high pressure cleaning is low. .

In the example described, the mechanical polishing apparatus 5 has a plurality of blades which function as polishing means 14, which blades are spring loaded at the positions designated by reference numeral 15, respectively.

The cleaning device 1 also has a support frame 16. The support frame 16 has two vertical bearers 17, 18 and two horizontal bearers 19. The support frame 16 is a closed frame.

Guided on the vertical supports 17, 18 of the support frame 16, the cleaning carriage 20 with the nozzles 6 and the polishing apparatus 5 move. In this case, the cleaning carriage 20 is moved up and down by a lifting device 21 mounted on the lower horizontal support 19. The carriage 20 has guide rollers 22 on the sides. The guide rollers 22 move on mutually opposite side surfaces of the vertical supports 17, 18. It will be appreciated that the cleaning carriage 20 can be moved up and down by any desired means. In addition, it is not essential to mount the guide roller 22 on the carriage 20. The carriage 20 may instead be guided on the vertical supports 17, 18 by means of suitable guide rails or of that kind.

In any case, in the form of the embodiment shown, the nozzles 6 and the polishing apparatus 5 are provided on a common cleaning carriage 20. 1 and 2, the cleaning carriage 20 has, on each side of the door plug 3, a length of approximately half or preferably less than half of the height of the oven door 3. It has a rather long cleaning-span 23. In this regard, FIGS. 1 and 2 show that the cleaning means of both the polishing apparatus 5 and the high pressure cleaning apparatus 7 are provided only on the upper end region 24 and the lower end region 25 of the cleaning span 23. ; It is also shown that in each case two polishing means 14 are arranged inside, and each nozzle 6 is arranged outside.

In detail, the design of the cleaning carriage 20 is U-shaped when viewed from above. The cleaning carriage 20 has a middle bearer 26 that moves between two vertical supports 17, 18. It also has two lateral bearers 27. The cleaning spans 23 are arranged on these side supports 27 on both sides of the door plug 3. Two side supports 27 are provided on each side of the door plug 3, respectively; In each case, no cleaning means are provided in the cleaning span 23 in the portion between these two side supports 27. The two polishing means 14 are located next to the side rests 27 for better absorption of the forces occurring during scraping. In addition, on each side, the side rests 27 are connected to each other by a foot 28.

1 and 2, only one springed blade serving as a grinding means and three nozzles 6 are provided in the upper end region 24 and the lower end region 25, respectively. do. Thus, on one side of the door plug, only two blades and six nozzles 6 are provided as mechanical polishing means 14; Since the cleaning carriage 20 is provided with the same number of cleaning means on the other side, the entire cleaning apparatus 1 is provided with four blades and twelve high pressure nozzles 6 as polishing means 14.

In addition, the high pressure nozzles 6 can be adjusted individually as well as grouped (ie for the upper end region 24 or for the lower end region 25) by means of a suitable control-device. Therefore, it is possible to operate only one group or only one nozzle 6 as required.

High pressure cleaning is also provided for the transverse cleaning of the upper door plug area 29, the lower door plug area 30 and the knife edge seal area 10. To this end, the support frame 16 has another carriage 31 on top and another carriage on the base, each of which is movable in the transverse direction. In this case, two rotating, with one of the nozzles 6 cleaning the knife edge seal area 10 and the other nozzle cleaning the door area 12 and a portion of the adjacent door plug area High pressure nozzles 6 are provided in each of said additional carriages 31.

In addition, as shown in particular in FIG. 3, the support frame 16 is surrounded by a suitable cover provided for the cover at least partly, ie laterally. Another intermediate cover 33 is provided between the two bases, indicated at 28.

Although not shown, the cleaning device 1 may be provided not only in a coke-oven servicing machine but also fixedly provided on a coke oven.

The cleaning by the cleaning device 1 of the present invention can be performed as follows, starting from the upper position of the cleaning carriage 20 shown in FIG. 1: First, nozzles of the upper group of the upper end region ( Only 6) is operated, and the nozzles 6 of the lower group of the lower end region 25 are not operated. The carriage is then moved downwards at a speed of 50 mm to 100 mm per second, and the surface 8 of the door plug 3 is scraped through the entire length by means of a knife-shaped polishing means 14. (On the other hand, only the upper knife edge seal area is cleaned by the upper nozzle group 6). Then, when the position shown in Fig. 2 is reached, the upper nozzle group is not operated and the lower The nozzle group is activated. Then, starting from the position shown in FIG. 2, the cleaning carriage 20 returns to the position shown in FIG. 1, during which high pressure cleaning is performed in the lower knife edge seal area. The surface 8 of the door plug is mechanically cleaned very well by passing the side of the door plug twice, but the knife edge seal area is sufficient for one pass and cleaning of the high pressure device 7. Simultaneously with the longitudinal cleaning, the transverse cleaning is also performed by means of additional carriages 31 in the upper and lower door plug areas.

In principle, of course, it is also possible to carry out only one pass of the longitudinal side of the oven door 3, while polishing and high pressure washing are carried out over the entire length of the oven door. In this case, nozzles of both groups of upper and lower are operated simultaneously.

The invention can be used in a cleaning device for cleaning the oven door of a coking chamber of a coke oven.

Claims (15)

A cleaning device (1) for cleaning an oven door (2) of a coking chamber of a coke oven, the oven door (2) being fitted with a door plug (3) and at least one outer peripheral knife edge seal (4). Equipped; To a cleaning device with a mechanical polishing device 5 for abrasive cleaning of the door plug area and at least a high pressure cleaning device 7 with nozzles 6 for high pressure cleaning of the knife edge seal area 10. In The cleaning device (1) for cleaning the oven door (2) of the caulking chamber of the coke oven, characterized in that the high pressure cleaning device (7) has rotating nozzles for cleaning the knife edge seal area (10). The method of claim 1, The high pressure washing apparatus (7) is provided with a washing medium which is ejected at a pressure of at least 50 bar, preferably at a pressure of 100 bar to 400 bar; Preferably the nozzles 6 are designed to rotate at a speed of at least 500 rpm, preferably at a speed of 1000 rpm to 4500 rpm, for cleaning the oven door 2 of the coking chamber of the coke oven. Cleaning device (1). The method according to claim 1 or 2, Additional fixed and / or to clean the door area 12 between the knife edge seal 4 and the door plug 3 and / or to clean the part of the door plug adjacent to the door area 12. Cleaning device (1) for cleaning the oven door (2) of a coking chamber of a coke oven, characterized in that rotating nozzles (6) are provided. The method according to any one of claims 1 to 3, The mechanical polishing apparatus 5 comprises scrapers, blades, strippers, scratchers and / or milling-cutters provided to the polishing means 14, Preferably, the cleaning device (1) for cleaning the oven door (2) of the coking chamber of the coke oven, characterized in that the polishing means (14) are spring-mounted. The method according to any one of claims 1 to 4, A support frame 16 having nozzles 6 and / or polishing apparatus 5 and having at least one cleaning carriage 20, which is guided and movable on the support frame 16, is provided; And The cleaning device 1 for cleaning the oven door 2 of the coking chamber of the coke oven, characterized in that the cleaning carriage 20 simultaneously washes both longitudinal sides of the oven door 2. . The method according to any one of claims 1 to 5, The cleaning device (1) for cleaning the oven door (2) of the coking chamber of the coke oven, characterized in that the nozzles (6) and the polishing device (5) are provided on one and the same cleaning carriage (20). The method according to any one of claims 1 to 6, The cleaning carriage 20 has a cleaning-span 23 whose length corresponds to approximately half the height of the oven door 2; And The polishing means 14 of the polishing apparatus 5 and / or the nozzles 6 of the high pressure cleaning apparatus 7 are at least, or preferably, upper and lower end regions 24, 25 of the cleaning span 23. Cleaning device (1) for cleaning the oven door (2) of the coking chamber of the coke oven, characterized in that it is provided only from. A cleaning device (1) for cleaning an oven door (2) of a coking chamber of a coke oven, the oven door (2) being fitted with a door plug (3) and at least one outer peripheral knife edge seal (4). Equipped; A high pressure cleaning device (7) with a mechanical polishing device (5) for cleaning the door plug area and at least nozzles (6) for cleaning the knife edge seal area (10); A support frame 16 is provided with at least one cleaning carriage 20 guided and movable on the support frame 16 for the nozzles 6 and / or the polishing apparatus 5, the nozzles ( 6) and / or the polishing device 5 is provided in one and the same cleaning carriage 20; In particular in the cleaning device 1 for cleaning the oven door 2 of a coking oven of a coke oven, according to one of the preceding claims, The cleaning carriage 20 has a cleaning span 23 which corresponds approximately to half of the height of the oven door 2; The polishing means 14 of the polishing apparatus 5 and / or the nozzles 6 of the high pressure cleaning apparatus 7 are provided at least on the upper and lower end regions 24, 25 of the cleaning span 23 and preferably Cleaning device (1) for cleaning the oven door (2) of the coking chamber of the coke oven, characterized in that it is provided only on the upper and lower end regions (24, 25) of the cleaning span (23). The method according to any one of claims 1 to 8, Only one polishing means 14-preferably a blade, particularly preferably a spring-mounted blade-in the upper and / or lower end regions 24, 25 of the cleaning span, respectively. And / or a cleaning device 1 for cleaning the oven door 2 of the coking chamber of the coke oven, characterized in that 1 to 10 nozzles, preferably 2 to 4 nozzles 6, are provided. ).  The method according to any one of claims 1 to 9, Caulking of the coke oven, characterized in that the nozzles 6 of the upper and / or lower end regions 24, 25 and / or the nozzles 6 of the end regions 24, 25 are controlled separately from one another. Cleaning device (1) for cleaning the oven door (2) of the chamber. The method according to any one of claims 1 to 10, At least one nozzle 6 of the high pressure cleaning device 7 is provided for the lateral cleaning of the upper and / or lower door plug area and / or the knife edge seal area 10; Preferably, for the lateral cleaning, cleaning of the oven door 2 of the coking oven of the coke oven is characterized in that at least one additional carriage 31 is provided which is movable on the support frame 16. Cleaning device (1). The method according to any one of claims 1 to 11, Cleaning device (1) for cleaning the oven door (2) of the coking chamber of the coke oven, characterized in that the support frame (16) is at least partially enclosed. Coke-oven servicing machine with a cleaning device according to any of the preceding claims. Coke oven with a cleaning device according to claim 1. A method for cleaning an oven door of a coking chamber of a coke oven by the cleaning device according to claim 1.

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