EP0085369B1 - Process for the dry cooling of coke, and cooling chamber therefor - Google Patents

Description

The invention relates to a method for dry coke cooling, in which the glowing coke is transported from the coke oven to the cooling shaft and cooled in this by means of a special bucket, for which purpose the special bucket is placed on the cooling shaft and then through a sluice which accommodates the housing from a closure, filling opening and intermediate piece there is emptied into the cooling shaft. The invention also relates to a cooling shaft with an outlet funnel for the special bucket and with a lock arranged on the filler opening for carrying out the method, the lock consisting of an intermediate piece and closure receiving and adjoining the filler opening.

The so-called coke dry cooling leads to a considerable reduction in the environmental impact when quenching the red-hot coke. The glowing coke is transported from the coke oven to the extinguishing device with the help of a special bucket, the special bucket being closed during transport. The special bucket is placed on the cooling shaft and the coke plunged into the cooling shaft by opening the bottom of the bucket. To prevent hot gases and dust from escaping during this process, a special lock is used to close the cooling shaft.

Basically, closable and lowerable closures for cooling shafts are known (DE-OS 30 04 175.9), the closure including the rollers and an intermediate piece being arranged in a closed housing. In the area of the closure, depressions are provided on the rails, into which rollers engage when the closure is closed. Naturally, due to this design, the closure can only be raised and lowered to a limited extent. The sealing effect of the closure is therefore dependent on additional measures. In addition, it is disadvantageous that the housing, which is closed on all sides, requires a large amount of space and must be sealed to such an extent that the escape of gases is reliably prevented. If the gases are sucked out of the housing, it is disadvantageous that the housing has such a large volume. In addition, the rollers on which the closure is transported back and forth have to be adapted to the high requirements within the closed slide housing, which requires the use of special material. Particularly disadvantageous, as mentioned, the complex dimensions of the housing, which result from the fact that the rollers and the rails and the actual closure and the intermediate piece are arranged within the housing, the closure and intermediate piece being pushed back and forth in the housing and raised will.

The invention is based on the object of making the method for coke cooling free of emissions even when the cooling shaft is required to be opened and of making the suction space required for this as small as possible.

The object is achieved according to the invention in that the intermediate piece and the closure are encapsulated in a housing on the chassis and, after the special bucket has been placed, the intermediate piece and closure move on rollers and running rails lying outside the encapsulated housing and from which largely sealed against the atmosphere and tightly enclosed space can be extracted when opening the filling opening.

The method according to the invention offers the possibility of safely collecting and removing the gases escaping when the cooling shaft is opened in a lock with the smallest possible volume. The filling process of the cooling shaft is therefore free of emissions, which contributes to a further relief of the environment. The closure and the intermediate piece can be moved back and forth and raised and lowered, the housing encapsulating these parts being encapsulated on the chassis. Encapsulation of this type limits the volume of the lock, but effective suction is nevertheless ensured in the period characterized by the emissions from the cooling shaft.

To carry out the method and to solve the problem with regard to the housing having the smallest possible volume, a cooling shaft is proposed in which the housing frame, in whole or in part together with the closure and intermediate piece, which are encapsulated on the chassis, is designed to be movable on rollers and running rails located outside the housing is. Such a housing is adapted to the dimensions of the closure and intermediate piece without taking the displacement path into account, so that its volume is correspondingly small. Because of the smallest possible space, both the design effort and the subsequent operational effort with regard to the extraction is low. The rollers and tracks located outside the housing are easier to access, easier to maintain and are not used by the escaping gases.

According to an expedient embodiment of the invention, the side walls of the housing frame, which connect to the horizontal housing spout and filling opening assigned to the housing cover and bottom, are assigned to the closure and intermediate piece and can be moved with them. In an advantageous manner, a housing acting as a lock is created here, which has the smallest possible space, which can be implemented in a structurally simple manner and yet effectively encapsulates the area around the filling opening from the atmosphere when the closure is opened.

A sufficiently tight seal between the reciprocating side walls and the housing cover and the housing base can expediently be achieved in that the side walls and housing cover and housing base have angle irons on the mutually opposite edges. A larger contact and sealing surface is created via the angle iron. It is also possible to design the side walls and housing cover and housing base in the area of the edges in a correspondingly bent manner in order to create contact or sealing surfaces.

According to a further embodiment of the invention, the side walls have edges on the housing cover and base facing edges of these sliding sealing elements. Since these sealing elements are not exposed to pressure or other loads, they are subject to only slight wear and lead to an optimization of the sealing if it should turn out that the intake of ambient air is unfavorable or harmful.

A quick and uniform lifting of the closure in all areas and accordingly also a lowering after completion of the filling process is ensured according to the invention in that the closure can be raised and lowered via a spindle drive which is coupled to the displacement drive.

It is particularly advantageous that such a spindle drive requires little space and can be arranged and designed according to the circumstances without requiring any significant design effort. The coupling to the slide drive ensures a continuous, cyclical operation and prevents accidental damage to the lock by actuating the slide drive too early. In addition, such drives can be designed so that they can be used for both functions one after the other.

Due to the spindle drive and the arrangement of the running rails next to the filling opening, it is possible to raise and lower the closure sufficiently so that an immersion seal or similar can be used in an advantageous manner. For this purpose, it is provided according to the invention that a sheet metal edge is arranged circumferentially and adjustable at the edge of the closure. The movable arrangement makes it possible to adapt such a closure to the particular circumstances. This creates a universal closure, which contributes to a reduction in reserve keeping. In addition, there is a good sealing effect without separate pressure forces. An advantageous light version of the closure is given if the insulation of the closure consists of fire-resistant mats.

The invention is characterized in particular by the fact that a method and a closure for cooling shafts of coke-dry cooling are created, by means of which effective sealing with the most favorable dimensions is given. Because of the low overall height and the side walls of the housing which can be moved with the closure and the intermediate piece, this or the lock has a small volume, which at the same time leads to a reduction in operating costs. The special design and arrangement of the side walls of the housing makes it possible to dispense with a widely protruding construction for encapsulating the closure and the intermediate piece. The accessories of the chassis are outside the housing and are therefore largely protected against the escaping gases and heat.

• Fig. 1 einen Schnitt durch den Kühlschacht im Bereich des Verschlusses in Längsrichtung des Fahrgestells,
• Fig. 2 einen Schnitt durch den Kühlschacht quer zur Längsrichtung des Fahrgestells und
• Fig. 3 eine Draufsicht.

Further details and advantages of the subject matter of the invention emerge from the following description of the accompanying drawing, in which a preferred exemplary embodiment is shown with the details and individual parts required for this. Show it:

• 1 shows a section through the cooling shaft in the area of the closure in the longitudinal direction of the chassis,
• Fig. 2 shows a section through the cooling shaft transverse to the longitudinal direction of the chassis and
• Fig. 3 is a plan view.

Fig. 1 shows the upper region of a cooling shaft 1, which runs into the filling opening 2, which is closed in the position shown in Fig. 1 via the closure 3 from the atmosphere. Above the cooling shaft 1 or the filling opening 2 there is the outlet funnel 5, via which the glowing coke is filled into the cooling shaft 1. During the filling process, the closure 3 is raised and moved aside, the intermediate piece 4 simultaneously coming into the position of the closure 3 and thereby closing off the transition region between the discharge funnel 5 and the filling opening 2. Suction ports 6 are indicated on the side of the discharge funnel 5. The gases flowing out when the cooling shaft is opened are sucked in and sucked out via the suction connection 6, these being connected to the housing frame 9 encapsulating the closure 3 and the intermediate piece 4.

The cooling shaft 1 is provided with a lining 7 which extends up to the area of the filling opening 2. The closure 3 itself is provided with appropriate insulation 8. Due to the lightweight construction, it is easy to handle.

Closure 3 and intermediate piece 4 are assigned to a common chassis 10, which has several, preferably four, rollers 11, 13 has, which in turn can roll on the rails 12, 14. 1 and 2, the rollers 11, 13 are arranged outside the cover created over the side walls 15, 16, 17, 18. The running rails 12, 14 themselves are also not included in the area formed by the housing frame 9 in order to safely discharge and then extract the gases escaping when the closure 3 is opened. The structure of the chassis 10 is explained in more detail below with reference to FIG. 3.

Fig. 2, in which is cut transversely to the direction of travel of the chassis 10, illustrates how the upper edge 19 and the edges of the side walls 15, 16, 17, 18 are guided in or on the housing cover 20 or housing base 21. The housing cover 20 is assigned to the outlet funnel 5, the housing base 21 to the cooling shaft 1 or the filling opening 2. In cooperation with one another, the side walls 15, 16, 17, 18 and the housing cover 20 and the housing base 21 form a housing which, because of its small volume, can be kept free by suction with little effort. The sucking in of external air into the housing is effectively prevented by said special design of the upper edge 19 or the edges of the side walls 15, 16, 17, 18. Fig. 2 also makes it clear how exactly the closure 3 and the associated parts can be cut, because one can dispense with the inclusion of the rollers 11, 13 and other parts that are important for moving the closure 3 in the sealing that takes place via the side walls .

The running rails 12, 14 run parallel to the filling opening 2 below the actual closure 3 (FIG. 3). On the upper flange of the double-T profiles 24, the rails 12, 14 are attached, which ensure a smooth rolling of the rollers 11, 13. 2, the rails 12, 14 are arranged below the edge 22 of the filling opening 2 and parallel to the wall 23 thereof. As a result, the device has a sufficient lifting height for the closure 3, so that an immersion seal 26 can be used, which ensures an optimal sealing of the cooling shaft in the closed state. For this purpose, 3 edge plates 27 are arranged on the lower edge of the closure, which are inserted with their free end 28 into the immersion seal 26. On the side opposite the free end 28, the edge plate 27 is folded over twice, so that a free edge 29 is formed which lies exactly on the edge 22. The aforementioned optimal closure of the cooling shaft 1 takes place via this free edge 29 and the immersion seal 26.

A spindle drive 32 is used to raise and lower the closure 3, which in the example shown is combined with the displacement drive 33. Via the spindle drive 32, the spindles 34, 35 are actuated, which then raise the closure 3 fastened to the support strips 36 or into the seat, i.e. insert in the immersion seal 26. For this purpose, the spindle drive 32 has the linkage 37, 38 in order to raise and lower the closure 3 simultaneously and evenly at all four corners.

Closure 3 and intermediate piece 4 are assigned to one and the same chassis 10, as has already been explained. This chassis 10 consists of the longitudinal beams 40, to which the rollers 11, 13 are also attached, and the cross members 41, to which the closure 3 or the intermediate piece 4 is attached. A roller protection 42 ensures, however, that the individual rollers 11, 13 are largely protected from being influenced by dirt and the like.

When the spindle drive 32 and the linkage 37, 38 are actuated, the closure 3 is first raised and then subsequently pulled away from the filling opening 2 via the displacement drive 33. Since the closure 3 and the intermediate piece 4 are assigned to the same chassis 10, when the closure 3 is moved, the intermediate piece is simultaneously drawn into this area and thus effectively covers this area when the coke falls. During the intermediate stages, the side walls 15, 16, 17, 18 in particular ensure safe discharge and suction of the gases flowing out of the filling opening 2, in each case interacting with the housing cover 20 arranged above or the housing base 21 arranged underneath and forming the said lock . The housing base 21 is provided between the rails 12, 14 and in such a way that the lower edges of the side walls 15, 16, 17, 18 can rub tightly on it.

The inner walls 44 of the intermediate piece 4 are arranged obliquely inwards and downwards, so that a rectangular or square funnel 45 is formed. Uniform passage of the glowing coke is thus ensured. The special design of the intermediate piece 4 and the connection between the intermediate piece 4 and the closure 3 is illustrated by FIG. 3.

Claims (8)

1. A process of coke dry quenching wherein the red hot coke is filled into a coke skip, transported from a coke oven to a cooling shaft where it is cooled, with the coke skip being put on and discharged into said cooling shaft through a sluice consisting of a seal, charge hole and spacer being accommodated in a housing, characterized in that said spacer and said seal are encapsulated in a housing at the undercarriage, and that after putting-on of said coke skip, said spacer and seal travel on rollers and guide rails located outside said encapsulated housing, and that gases released on opening said chargehole are sucked off from the narrow- enclosed room being largely sealed to atmosphere.

2. Cooling shaft with outlet hopper for said coke skip and with sluice situated on said chargehole to implement this process according to claim 1, with said sluice consisting of a casing housing a spacer and seal, said casing being connected to said chargehole, characterized in that the casing frame (9), wholly or partly, together with said seal (3) and spacer (4) being encapsulated at said undercarriage (10), are designed to travel on rollers (11)/(13) and guide rails (12)/(14) laid outside said casing.

3. Cooling shaft according to claim 2, characterized in that the side walls (15), (16), (17), (18) of said casing frame (9) which connect to the horizontal casing cap (20) and bottom (21) are allied to said outlet hopper (5) and chargehole (2), and allied to said seal (3) and spacer (4), and are movable with said seal and spacer.

4. Cooling shaft according to claim (3), characterized in that said side walls (15), (16), (17), (18) and said casing cap (20) and bottom (21) are equipped with angle irons at the edges being opposite to each other.

5. Cooling shaft according to claim 3, characterized in that said side walls (15), (16), (17), (18) are furnished with sealing elements grinding on the edges facing said casing cap (20) and bottom (21).

6. Cooling shaft according to claim 2, characterized in that said seal (3) can be lifted and lowered by a spindle drive (32) being coupled to the moving drive (33).

7. Cooling shaft according to claim 2, characterized in that a circular and adjustable edge plate (27) is mounted at the edge of said seal (3).

8. Cooling shaft according to claim 2, characterized in that the insulation (8) of said seal (3) consists of refractory mats.

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