Patent Application
20120216454
The invention relates to a method for horizontally successive production of coal pressing blocks suitable for coke oven chambers, wherein the coal is pressed in a press mould by vertical repeated stamping and wherein the shaping is accomplished by horizontal pressing to walls impermeable to coal, with one wall being mounted on a plate which is braked, and with two walls being movably supported in horizontal direction perpendicular to the plate, and wherein the production of coal blocks is accomplished successively by way of shifting the plate horizontally against a stationary wall. The invention also relates to a device by way of which these coal pressing blocks can be produced.
In numerous construction types, the charging of coke oven chambers is accomplished horizontally through a coke oven chamber door. Coal carbonization is frequently confronted with a problem in that the coal cannot be provided in precisely measured portions. It is also tried to find a possibility for charging the coal in the most compact manner possible and without any voids into the coke oven chambers in order to optimize the quantity of carbonized coal for cokemaking For this reason, there are prior art methods and processes available by way of which coal is pressed or compacted so that the coal is provided in form of finish-pressed blocks that are precisely dimensioned in terms of their quantity. Nevertheless the blocks composed of coal shall permit a gas evolution of coking gases.
DE 19545736 A1 describes a method for charging a coke oven which is floor-heated and which is provided with a low charging height and a large oven sole surface. According to this construction type, coal is charged horizontally into the coke oven chamber, with said coal according to the invention being poured outside the oven at an even level onto a planar bottom plate and subsequently compacted to obtain a compacted coal cake which is gently pushed into the coke oven chamber, retracting the bottom plate subsequently from the coke oven chamber whilst the coal cake is retained at the front side. The coke oven chamber is thus charged with a compacted coal cake. The method does not disclose any hints relating to several pressed blocks that are produced simultaneously so as to allow for gas evolution of coking gases between the pressed blocks.
WO 2006056286 A1 describes a hydraulic pressing device for producing a compacted coal cake composed of a pourable bulk coal material for use in a coke oven, said device being comprised of a press mould formed by a car or sled comprising walls, a floor and a stop wall and above which a feeding chute for coal is arranged transversely to its direction of travel, and comprising a cylinder headpiece which presses the bulk coal material supplied from the feeder chute by means of a hydraulic device horizontally against the arrest wall so that the pourable bulk coal material obtained from the coal can be pressed by a multitude of horizontal pressing cycles to a density that is by up to 60% higher. The upper limit of the coal cake is set by a pressed cake cover. A pressing force acting vertically and several times onto the coal cake for compaction is not described therein.
DE 2922861 A describes a method for compaction of a fine-grain coal blend destined for coal carbonization, said coal blend being flung by a feeder system into a compacting mould, which is accomplished by one or several fling wheels which are equipped with one or several blades. Compaction by way of the blade arrangement is executed in bales and performed by means of the kinetic energy which is taken-up by spinning-off the coal particles into the compacting mould provided for this purpose. This method depends on the quality of the implemented coal and it may require certain residual moisture, preheating or the addition of an appropriate bonding agent.
WO 0229345 A1 describes a method for charging a coke oven chamber with coal, wherein a combined charging and pushing machine is arranged beside the coke oven chamber door, said machine also performing the compaction of coal, and wherein the compaction is effected in a compartment that is formed by two movable side walls and two stationary side walls, and wherein the coal cake thus compacted is loaded after compaction into the coke oven chamber. A pressing force acting vertically is not provided for here either. And it is not possible either to subdivide the compacted coal cake into several single pressed green compacts so as to achieve an improved gas evolution during coal carbonization.
It would be a substantial advantage to provide a method and process that compacts the coal with a vertically acting load and by way of which pressed green compacts containing voids are obtained from the loose coal so that the coking gases evolving on coal carbonization can escape. It would also be of advantage to have the possibility to charge the coal directly from the compacting unit into the coke oven chamber.
The present invention solves this task by providing a method that produces coal pressing blocks from pourable bulk coal which are suitable for use in coke oven chambers, and according to which the coal is compacted by a vertically acting force, thus furnishing the coal in portions so that voids still remain between these portions through which the coking gas evolving on coal carbonization can escape, with the horizontal press mould being formed by walls impermeable to coal, thereof one wall being mounted on a plate in a preferably back-foldable arrangement, and another two walls thereof being mounted laterally and uni-dimensionally in a stationary arrangement, and another stationary wall being pressed against the plate during the compacting procedure, and wherein the vertically acting force is exerted by a horizontally stationary stamping device so that the coal compacts can be successively produced by a horizontal movement of the plate.
Claim is laid in particular to a method for successive production of coal pressing blocks suitable for use in coke oven chambers, wherein
The plate with the back-foldable closure wall, which is impermeable to coal and rigidly mounted to the plate, serves as a car due to the horizontal mobility of the plate. By the existence of the back-foldable coal-impermeable closure wall at the plate and the two stationary walls extending in parallel to the direction of movement of the plate in one horizontal direction which are movable vertically to the direction of movement of the plate in the second horizontal direction, it is possible to retain the coal pressing blocks even during another stamping procedure in the mould and to avoid a spreading of coal in horizontal direction. Accordingly, the plate is moved into a position in which the two lateral walls can be moved towards the plate in an appropriate position so that a press mould with the desired lateral pressure is obtained. The coal-permeable side thus formed is closed by the coal-impermeable stationary stop wall against which the plate is moved or braked for pressing.
The method is advantageously so configured that the produced coal pressing blocks are covered during the production of the next coal pressing block by way of a cover plate arranged above the coal pressing block. Thereby it is possible to retain the coal pressing blocks in the mould even during another stamping procedure and to avoid a spreading of coal in upward direction.
The plate is advantageously supported on rollers so that the plate is horizontally movable in a uni-dimensional manner. The rollers proper are supported on a car which is movable in the second horizontal direction so that the car is moved for charging in one direction to the front of the coke oven chamber destined for charging, and so that the plate is moved in the other direction to the coke oven chamber destined for charging. In one embodiment of the present invention, the plate is moved with the coal pressing blocks for charging into the coke oven chamber and after charging it is refracted again from the coke oven chamber, holding the coal cake tight at the front side.
In another embodiment of the inventive method, it is also possible to remove, fold back or sink the arrest wall mounted at the car, with the car being moved close to the opened coke oven chamber, sliding the coal cake composed of finish-coal pressing blocks for charging the coke oven chamber from the car into the coke oven chamber. Thereby, the coal pressing blocks can be loaded directly from the car into the coke oven chamber. The inventive method is intended to enable charging of a single coal pressing block as well as part of the coal pressing blocks as well as all coal pressing blocks into the coke oven chamber.
A coal pressing block produced by applying the inventive method typically has an average width of 3500 mm to 4500 mm and an average length of 450 mm to 550 mm. In a preferred embodiment, the coal pressing blocks have an average width of 3750 mm and an average length of 500 mm. However, the method can be altered so that the coal pressing blocks have any arbitrary dimension.
In a typical embodiment, the coal pressing block(s) has (have) an average height of 950 mm to 1050 mm after production. In a preferred embodiment, the height of the coal pressing blocks after production accounts for 1000 mm on average.
Claim is also laid to a device by way of which the inventive method can be implemented.
Claim is laid in particular to a device for horizontally successive production of coal pressing blocks suitable for use in coke oven chambers, said device comprised of
The stamping device which is movable in vertical direction and utilized for stamping the coal is preferably driven by a hydraulic device. However, it is also feasible to utilize an electrically or mechanically operated device. The stamping device may be of any design and/or construction type. In a typical embodiment, the coal-feeding device is a reciprocating plate feeder. It typically supplies pourable bulk coal from a coal reservoir bin. However, other construction types are feasible in connection with the main claim of the said device in any embodiment.
For executing the present invention, the plate is horizontally uni-dimensional or nearly uni-dimensionally movable depending on the lateral guidance. Upon production of a press mould, it is constantly moved on a bit so that the stamping device is positioned above the coal mould to be compacted. In addition to the uni-dimensional horizontal mobility, the plate may be supported on rollers which are mounted on a car that can be moved transversely to it in horizontal direction along the front of the coke oven battery. To provide support, the bearing rollers for the compacting station may be installed in a stationary arrangement.
In a possible embodiment, this car is equipped with wheels to allow for its movement. In another embodiment, the plate is equipped with skids to allow for its movement, and these skids can be moved on rails destined for this purpose so that the plate can be designated as a sled. The plate can then be moved along the front of the coke ovens. Drives or arresting devices can be provided at any arbitrary position.
The invention provides a method and a device that compact the coal with a vertically acting force so that press moulds containing voids are developed from the loose coal. Thereby, the coking gases evolving on coal carbonization can escape. Coal can be charged directly from the compacting facility into the coke oven chamber. Expenditure on plant equipment and technology can thus be saved.
The inventive device is elucidated by way of five drawings which represent a temporal sequence of a typical pressing cycle. These drawings just represent an exemplary embodiment for the design and construction of the inventive method, which is not restricted to the form of this embodiment.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2009 052 901.2 | Nov 2009 | DE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2010/006634 | 10/30/2010 | WO | 00 | 5/5/2012 |
