WO1986007374A1

WO1986007374A1 - Method and device for cleaning doors of coke ovens

Info

Publication number: WO1986007374A1
Application number: PCT/DE1986/000217
Authority: WO
Inventors: Heinz Stegmann; Hans Jürgen KILLICH
Original assignee: Saarberg-Interplan Gesellschaft Für Rohstoff-, Ene
Priority date: 1985-06-14
Filing date: 1986-05-24
Publication date: 1986-12-18
Also published as: DD247915A5; DE3521375A1

Abstract

In order to remove the bitumen and the tar which adhere to the frame and to the door of a coke oven, a flame is directed against the soiled areas, and as a consequence, the flame hardens the bitumen and the tar which thus lose their sticking power and are transformed into a pitch mass which is scraped and removed. A vertically or horizontally movable frame (6) or an associated carriage (7) is provided with gas cleaning nozzles (10, 11, 12) aligned in height and which enable to direct the flame exactly onto the soiled areas.

Description

Process for cleaning coke oven doors and sofa door cleaning device

The invention relates to a method for cleaning the oven frame and the coke oven doors of coke oven batteries with a medium which removes bitumen and tar deposits and is directed against the surfaces via nozzles. The invention also relates to a device for cleaning the furnace frame and the coke oven doors of tar and bitumen approaches which can be pressed against their sealing surfaces, with carriages holding the cleaning tools and a drive therefor.

The tar which is released during the coking process or the bitumen which is released in the coking chamber furnaces settle into the sealing surfaces between the coke oven doors and the furnace frame. The tar-like deposits on the sealing surfaces of the individual coke oven doors prevent proper closing and lead to leaky spots, especially if the tar or bitumen hardens accordingly. Highly smoking or even burning coke oven doors are the result, both the doors themselves are endangered and there is a considerable environmental impact. In addition, quality and quantity reductions occur in the coke produced due to the carbon burn.

In order to achieve a tight closure of the coke oven doors on the coke and on the machine side, the coke oven doors and oven frames are cleaned at certain time intervals, with cleaning currently being carried out after each pressing-out process. The machine-side cleaning devices are movably and rotatably mounted on the printing press or ramming, loading and squeezing machine. The coke-side cleaning devices assigned to the coke cake guide carriage are of comparable design. It is known to provide mechanical scrapers attached to a circulating chain, the cleaning head with the scrapers via springs or more often is pressed onto the cleaning surface using small cylinders. The mechanical effort required for this is enormously high, with frequent readjustment requiring considerable additional work. In addition, the individual scrapers have to be regularly cleaned with the help of spatulas from the sticky bitumen mass or from the tar, which entails a considerable maintenance effort. In addition, it is difficult to remove these sticky masses, since they get stuck in the redler band and impair its work.

It is also known to use a cleaning device with which water is sprayed onto the surfaces to be cleaned under high pressure. The tar is detached under the hard water jet and washed away. The material stresses occurring here due to the considerable temperature differences are the main disadvantage of the known method. The service life of the cast frames and cast doors as well as the stone lining of the door plugs are to be set much shorter, since these materials are unsuitable for high temperature differences. In addition, the sometimes considerable amounts of water that are incurred during the cleaning process are very cumbersome for the ongoing coking plant operation.

The invention has for its object to provide a simple and economical cleaning method and a device that also enable easy removal of the dissolved bitumen or tar.

The object is achieved in that the adhering bitumen or tar is peeled off at the same time over the height of the door or the furnace frame in several places via directed flames. In this process, the bitumen or tar mass hardens and advantageously loses its sticky property. As a result, the then pitch-like mass can be easily transported away through the redler belts running along the battery, without it sticking there or at other points. During this process, it is virtually peeled off by the flame from the oven frame or the coke oven door and falls off automatically.

In order to support the detachment as such and at the same time to influence the temperature of the flame, it is provided according to the invention that air is specifically added to the gas stream or the flame. It is also conceivable to conduct an air flow parallel to the flame in order to use it to detach the pitch-like mass or to promote it. It is particularly advantageous in this process that mechanically moved scraper or the like. can be dispensed with in principle.

After a further training, the air is added enriched with sharp-edged sand or metal parts in order to optimize the cleaning effect or to carry out a kind of post-cleaning behind the flame.

To carry out the method, a device is used with a carriage holding and driving the cleaning tools, advantageously dispensing with rotating parts and creating an extremely simple and effective drive in that the carriage is designed as a vertically and horizontally movable holding frame or is assigned to one and is matched to the shape and is equipped with gas-operated cleaning nozzles. In this invention According to the present solution, all-round scraper carriages, endless chains, etc. are dispensed with, in that the holding frame with the cleaning nozzles arranged thereon only has to execute a relatively short stroke in order to coat the respectively assigned area of the oven frame or the coke oven door with the flame. The entire device is equipped with only a single drive which moves the holding frame up and down, which at the same time simplifies maintenance considerably and, above all, significantly reduces costs. The cleaning nozzles are shaped, that is to say they conform to the shape, so that they can simultaneously cover areas of the furnace frame and the coke oven door which are at different angles to one another.

The upward and downward movement of the holding frame is accomplished in a particularly expedient manner in that a hydraulic cylinder that moves it is assigned to the holding frame. This hydraulic cylinder can move all assigned nozzles evenly and by the same amount at the same time by the movement of the holding frame, so that it is possible to coat the oven frame and the coke oven door evenly. Damage caused by the hot flame cannot occur on these parts because they are kept at a certain temperature by the heat in the coke oven and because they are designed to withstand high temperatures.

Damage to the cleaning nozzles and an exact and always the same effect of the cleaning nozzles is achieved in that the carriage has a spacer that can be pressed against the furnace frame or the door plug. The carriage or the supporting holding frame is always held at the same distance from the furnace frame or the coke oven door or is trimmed in this position via this spacer, only then to feed and ignite the nozzles with gas.

Possibly. Remaining parts of the pitch-like mass that are still adhering are safely detached from the oven frame and the coke oven door, since according to an embodiment of the invention, mechanical cleaners, preferably spring-loaded steel brooms in the carriage are seen downstream of the shape-matching cleaning nozzles. The spring-loaded steel brooms brush evenly over the surfaces to be cleaned or pre-cleaned and detach the still sticking pitch-like parts ^* . Since the bitumen or the tar have lost their adhesive properties due to the treatment with the hot flame, this subsequent mechanical cleaning is fully effective and can be handled over a long period of time without substantial maintenance work.

Both longitudinal parts of the oven frame and also the coke oven door are cleaned simultaneously and evenly, since the cleaning nozzles are arranged next to and above one another and are each assigned in pairs to the carriages attached to the height of the holding frame.

Around all areas of the oven frame and the coke oven door safely in one operation, i.e. To be able to clean a stroke of the lifting cylinder, it is provided according to the invention that the stroke of the hydraulic cylinder is at least one overlap length of the nozzle working area. The subsequent nozzle thus safely passes over the area in which the nozzle arranged above began its cleaning work when the cleaning process was started.

The gases and dust particles that may be released during the cleaning process are safely collected and can then simply be made harmless in a known manner by in each case placing a path above the coke oven. pivoted coke oven door projecting disposal hood is arranged. This disposal hood protrudes beyond each coke oven door in the manner of an awning, so that the dust particles that are torn up by the heat can be safely collected in order to then be rendered harmless.

The invention is characterized in particular by the fact that a method and a device are created with which the difficult cleaning work on coke oven doors can be carried out safely and without environmental pollution and with which it is ensured that the cleaning tools as such without separate extensive Cleaning work is immediately available again for the next cleaning process. Surprisingly, this also means that the contaminants removed from the oven frame and the coke oven doors can be safely removed with the usual conveying devices, even in the case of a higher volume.

Further details and advantages of the subject matter of the invention result from the following description of the accompanying drawing, in which a preferred exemplary embodiment with the necessary details and individual parts is shown for cleaning the furnace frame on the one hand and the coke oven door on the other hand. Show it:

1 shows the cleaning device for the oven frame in a side view,

2 shows the cleaning device according to FIG. 1 in front view,

3 shows a section through the front area of a coke oven with a cleaning device in front in the area of the nozzles,

4 shows the section shown in FIG. 3 through the front area of the coke oven at the level of the mechanical cleaning parts, 5 the cleaning device for the coke oven doors in front view,

Fig. 6 shows the cleaning device of FIG. 5 in side view

Fig. 7, the cleaning device in section in the region of the cleaning nozzles and

Fig. 8, the cleaning device according to FIG. 5 in section in the area of the mechanical cleaning parts.

The coke oven battery 1 is only indicated, and in this respect FIG. 1 shows the opening of the coke oven 2 and the oven frame 3 indicated above and below, as well as the pre-set cleaning device. The cleaning device shown in FIG. 1 is the device for cleaning the furnace frame 3.

The cleaning device initially has a support frame 5, via which the actual cleaning parts are moved in the direction of the coke oven 2 and in the opposite direction. Arranged on the support frame 5 is a holding frame 6 which, overall, serves as a type of carriage 7, namely because it can be moved up and down specifically via the hydraulic cylinder 8, in order to guide the cleaning nozzles 10, 11, 12 past the surfaces to be cleaned and to process with the flame, not shown here. The distance between the cleaning nozzles 10, 11, 12 is maintained by the spacers 13, 13 *, which are supported against the furnace frame 3 when the holding frame 6 is advanced in the direction of the coke oven 2. The spacers 13, 13 'can also be designed to be adjustable so that the spacing of the cleaning nozzles 10, 11, 12 can be varied according to necessities or to adapt to the deformation of the furnace frame 3.

On the inside of the holding frame 6 is also a heat shield 15 is attached, which extends into the coke oven 2 and thus protects the entire cleaning device from the heat flowing out of the coke oven, but in particular ensures that the cleaning work of the cleaning nozzles is not influenced by this hot air.

The holding frame 6, as shown in FIG. 2, consists of two angular irons or of a continuous U-iron 17 which has recesses 15 in the area of the holder for the heat shield in order to ensure that it protrudes far into the coke oven. The U-iron 17 is opened in the direction of the holding frame or carriage and, in the embodiment shown here, carries a total of four nozzles lo, lo ', over which the entire area of the cleaning surface 20 is coated.

The roller guide 19 is arranged in the holding frame 6, which consists of two U-bars opposed to each other, by means of which a uniform movement of the entire holding frame 6 or of the carriage 7 over the height is possible. The nozzle holder 18 and the spacer 13, 13 'are articulated laterally on the U-iron 17.

The carriage 7 is influenced or displaced by the hydraulic cylinder 8, which is arranged parallel to it and is fastened, for example, with its upper end to the carriage and with the lower end to the holding frame 6. Beneath the cleaning nozzles lo, 11, 12, steel brooms 23, 24 are connected to the U-iron 17, which mechanically clean the cleaning surfaces 2o previously cleaned by the nozzles lo, lo '. A spring-loaded mounting of these steel brooms 23, 24 is already secured by means of correspondingly thin webs 3o, 31. However, it is possible to provide the webs 3o, 31 with spring assemblies 29, as is illustrated in FIG. 8. In any case, it should be ensured that A uniform pressure of the steel brooms 23, 24 is ensured via the webs 3o, 31 or the holder 28. For the sake of clarity, the surfaces 20 to be cleaned are, incidentally, dark.

5, 6, 7 and 8 show the embodiment of the cleaning device with which the coke oven door itself is cleaned. Here, f1-shaped cleaning nozzles lo, 11, 12 are arranged at the same intervals as in the cleaning device according to FIGS. 1 to 4. Here, too, nozzle holders 18 are provided, on which these nozzles are held and fixed in such a way that they each can coat the door plug 26 and the coke oven door 27 evenly in the area of the cleaning surfaces 21. The necessary spacer 14 is arranged and connected to the carriage 7 in such a way that it runs against the door plug 26 and thus the carriage 7 or the carriages 7, 25 at the optimal distance from the coke oven door 27 or the door plug for the cleaning work 26 holds.

Here, too, the individual cleaning nozzles 10, 11, 12 are assigned to a holding frame 6 or supporting frame 5, by means of which they can be moved in both the horizontal and vertical directions. The movement also takes place here via the hydraulic cylinder 8, which is fastened on the one hand to the holding frame 6 and on the other hand to the carriage 7 in such a way that they are moved up and down uniformly and evenly.

Mechanical cleaning parts in the form of steel brooms 23, 24, which process and clean the cleaning surfaces 21 behind the cleaning nozzles lo, 11, 12, are held below the cleaning nozzles 10, 11, 12 via holders 28 and possibly spring assemblies 29.

The dust generated during this work is over - lo -

the disposal hood 22 attached above the coke oven door 27 or the coke oven 2 is collected and then fed by suction to a cleaning device, which is not shown here.

The tar detached during the cleaning process or the pitch-like mass simply falls downward, specifically into the regulator (not shown here), via which the material is discharged together with the other coal and is returned to the coking coal. The addition of this material is not a disadvantage because of the small amounts in relation to the coal.

Claims

Patent claims

1. A method for cleaning the oven frame and the Koks¬ oven doors of coke oven batteries with a bitumen and tar approaches releasing medium, which is directed against the surfaces via nozzles, characterized in that the adhering bitumen or tar simultaneously over the height of the door or the oven frame peeled off in several places over directed flames.

2. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that air is specifically added to the gas stream or the flame.

3. The method of claim 2, d a d u r c h g e k e n n z e i c h n e t that the air is added enriched with sharp-edged sand or metal parts.

4. A device for cleaning the furnace frame and the coke oven doors that can be pressed against their sealing surfaces by tar and bitumen approaches with the cleaning tools holding trolley and a drive therefor according to claim 1 to claim 3, characterized in that the trolley (7) can be moved vertically and horizontally Holding frame (6) is formed or assigned to one and is equipped with shape-adapted and gas-operated cleaning nozzles (10, 11, 12).

5. The device according to claim 4, characterized in that the holding frame (6) is assigned a hydraulic cylinder (8) which moves it.

6. The device according to claim 4). so that the carriage (7) has a spacer (13, 14) that can be pressed against the furnace frame (3) or the door plug (26).

7. The device according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the shape-adapted cleaning nozzles (lo, 11, 12) each mechanical cleaners, preferably spring-loaded steel brooms (23, 24) are arranged in the carriage in the direction of travel.

8. The device according to claim 4, d a d u r c h g e k e n n z e i c h n e t that the cleaning nozzles (lo, 11, 12) arranged side by side and one above the other and each pair associated with the height of the holding frame (6) attached carriage (7, 25) si nd.

9. Apparatus according to claim 4 and claim 5, so that the stroke of the hydraulic cylinder (8) is at least one overlap length of the nozzle working area.

10. The apparatus of claim 4, d a d u r c h g e k e n n z e i c h n e t that in each case above the coke oven (2) a wegge¬ pivoted coke oven door (27) projecting disposal hood (22) is arranged.

11. The device according to one of claims 1 to lo, d a d u r c h g e k e n n z e i c h n e t that on the inside of the holder frame (6) in the coke oven (2) protruding heat shield (15) i st.