JP2009516033A - Centrally controlled coke oven charge system for primary and secondary air - Google Patents

Abstract

  The present invention is an air supply device for a non-recoverable coke oven, the air supply device comprising at least one opening that extends through a mounting member or wall, such as a furnace door. The furnace chamber is connected to the atmosphere surrounding the furnace and can be completely or partially closed using a closing element. In this case, two or more of the closure elements are connected via at least one mechanical coupling element, in which case the coupling element is fixed directly to the closure element or via a lever. Each coupling element is coupled with at least one adjustment element so that the closure element can be moved, and each opening can be closed, fully open or any It can also be adjusted to an intermediate position. This coupling element is ideally a chain or a threaded spindle.

Description

  The present invention relates to an apparatus and a method for supplying combustion air for burning carbonized gas (Verkokungsgas) in a coking oven (Verkokungskammer) of a coke oven arranged in a flat structure and arranged as a furnace group, so-called non-heat recovery. The present invention relates to an apparatus and a method for supplying combustion air for a non-recovery-verfahren method or a heat-recovery-verfahren method. In this case, the device is provided for supplying secondary air to the flue and at least one supply opening provided in each coking chamber, extending through each coke oven door or the wall surrounding the coke oven door. Each of the air supply openings is assigned with a movably supported closing element.

  All closure elements are mechanically coupled with at least one adjustment element, which is controlled and driven from a central location. The adjustment element then operates the closure element continuously in relation to the demand for combustion air in the coking chamber. The mechanical connection between the central adjusting element and the individual closing element can be made individually, in particular in this case the starting position of the individual closing element is at the start of the carbonization process or the carbonization process of the associated carbonization chamber. Can be carried out independently of the other closing elements of the adjacent carbonization chamber.

  Heating of the heat recovery furnace is usually performed by combustion of gas generated during dry distillation. Combustion is controlled in this case as follows: a part of the gas burns with the primary air on the charged coal in the furnace chamber. This partially burned gas is supplied to a flue at the bottom of the furnace chamber via a passage also called "Downcomer", where it is completely burned by the addition of another combustion or secondary air .

  In this way, the charging coal is supplied with heat directly from above and indirectly from below, which advantageously affects the carbonization rate and thus the power of the furnace. In order to carry out the method, it is necessary to accurately measure the supplied primary and secondary air, and the supplied primary and secondary air can be distilled for 20 to 96 hours. It is necessary to variably control over the length of time. The prior art fully describes flat structure type heat recovery furnaces and non-heat recovery furnaces. For example, US 4,344,820, US 4,287,024, US 5,114,542, GB 1555400, or CA2052177C can be cited as conventional techniques.

  According to universal prior art, primary air is drawn from the atmosphere through an opening in the door. Secondary air is sucked through openings near the bottom of the furnace and is introduced into the flues through passages, which extend substantially horizontally below the coke oven chamber. The openings for primary air and secondary air are always open or have flaps for adjusting the amount of air drawn.

  Since the furnace cluster is very large, usually at very high temperatures, and very intensely fouling, the prior art discloses manually adjustable air supply flaps. In such a coke oven assembly disclosed in US 5,928,476, each coke oven door is provided with three manually operable openings, which are aligned with the opening cross-section and centered. A single plate supported on the shaft is arranged. The position of these opening flaps can be changed by hand via a lever.

  In practice, however, changing the primary and secondary air volume during manual adjustment over the carbonization time is essential, but very rarely done, so the time-related ideal adjustment is Almost impossible. Furthermore, manual operation puts a great burden on the health of workers.

  The object of the present invention is therefore to eliminate the said drawbacks related to economic problems and to ensure an optimized supply of primary air and / or secondary air. Moreover, in this case, certainty of operation must be ensured against the high temperatures and extreme contamination normally present.

In order to solve this problem, in the configuration of the present invention, in order to supply primary air and secondary air for burning carbonized gas in a carbonizing chamber of a coke oven that is configured as a flat structure and arranged as a furnace group. The air supply device comprises at least one air supply opening provided in each carbonization chamber, and the air supply opening includes a coke oven door or a wall surrounding the coke oven door. In the form of a closure element extending through and further movably supported for each air supply opening,
All closing elements of the air supply opening are mechanically coupled with at least one adjustment element, which is controlled and driven from a central location;
The closure element is operated with a regulating element in connection with the demand for combustion air in the coking chamber;
The individual closing elements and the central adjustment element can be mechanically connected individually, in particular the starting position of the individual closing elements individually at the beginning of the carbonization process or carbonization process of the associated carbonization chamber, and It can be set independently of the other closing elements of the adjacent carbonization chamber.

  In the arrangement of the invention, the coupling of the closing element and the adjusting element is as follows: both elements are connected directly or connected, for example, levers, cables, chains, lever arms etc. and combinations of these elements It means that they can be releasably linked to each other via an element.

  In an advantageous configuration of the invention, the adjusting element is designed as a circulating chain or steel rope. It is likewise advantageous to use a threaded spindle as the adjusting element. All these adjustment elements allow for a continuous operation in one direction of movement, which is very advantageous for the entire continuous process.

  In another advantageous configuration of the invention, a closing plate is used as the closing element, which is supported such that the closing plate moves substantially parallel to the furnace door when operated by the coupling element. .

  For a properly directed primary gas flow, it is advantageous if the vent openings are shaped rotationally symmetrically. It is therefore advantageous to use a closing plate which is formed as a vertically standing closing plate and is supported so as to be rotatable in the vertical or horizontal direction about a central axis.

  In another advantageous configuration of the air supply device, the closure element is formed from at least two face members that are mutually overlapable and shiftable relative to each other, the face members ideally when partially open, A polygonal, point-symmetric or substantially circular cross section is opened. If comprised in this way, the sucked-in air will not change in an air supply opening, and the sucked-in air will be introduce | transduced in the depth of a furnace chamber based on the high flow velocity.

  In another advantageous configuration of the invention, the closure element is conical and the tip is directed towards the furnace chamber in the assembled state. Such a configuration is further optimized by the fact that the air supply opening has the same opening angle as the associated conical closing element or a larger opening angle. In such a configuration of the closing element for the air supply device according to the invention, the sucked-in air causes very little vortex flow in the area of the closing element and in the area of the air supply opening, with an open cross-sectional area. A gas flow is formed regardless of the dimensions.

  If the values of the cone angles of the air supply opening and the closing element are different, it is possible to reliably prevent dirt deposited on the air supply opening from preventing the air supply opening from being completely closed. In this case, the conical closure element is moved in the longitudinal direction of the opening via the lever structure and / or the spindle, thereby opening the circular ring gap when partly open.

  In another advantageous configuration of the air supply device, the closure element is releasably coupled to the adjustment element such that the closure element is automatically disengaged from the adjustment element at the end position upon complete closure of the air supply opening. ing.

The invention also relates to a method for supplying fuel air in a coke oven, in which the above-described air supply device according to the invention is used,
A) after emptying and refilling the coking chamber, bringing the closing element into the starting position, where the air supply opening is fully or almost fully open, combined with the central adjustment element;
B) During the carbonization time, the closing element is operated continuously and with a substantially constant average speed or adjusting frequency by the adjusting element, and the vent opening is closed as it is,
C) The closing element of the carbonization chamber supply opening is closed completely at the end of the carbonization period of each carbonization chamber at the latest and dissociated from the regulating element,
D) After emptying and newly filling the carbonization chamber, the method shown in b) is started anew.

  In an advantageous method of the invention, the closure element is automatically disengaged from the adjustment element in the final position.

  In another advantageous method of the invention, at least two central adjustment elements are provided, one adjustment element moving the primary air closing element and the other central adjustment element for the secondary air. The closing element was moved. In this case, both adjustment elements can be adjusted independently of one another completely during the total carbonization time.

  It is also advantageous to operate the central adjustment element continuously and at approximately the same speed or frequency.

  It is also included in the present invention to use the air supply device according to the present invention in a method for supplying combustion air in a coke oven carbonization chamber arranged in a flat structure form and arranged as a furnace group.

  Next, three embodiments of the present invention will be described with reference to FIGS. The present invention is not limited to the illustrated embodiment. FIG. 1 is a front view showing a coke oven 1. The coke oven 1 has a coke oven door 2 on the front surface. The coke oven door 2 is provided with two vent openings 3 for primary air. Below the coke oven door 2, flues 4 are shown in broken lines, and these flues 4 extend below the furnace chamber. Ventilation openings 5 for supplying secondary air to these flues 4 are provided near the bottom under the flues 4.

  FIG. 1 further shows a closure element 6 for the primary air supply vent opening 3 and a closure element 7 for the secondary air supply vent opening 5. Each closing element mainly comprises a closing plate 9 and a lever arm 10 and is supported on a shaft 8, and each closing element is rotatable about the shaft 8. The lever arm 10 of the closing element 6 is releasably connected to the circulating chain 11, and the closing element 11 is releasably connected to the circulating chain 12.

  Due to the continuous movement of the chain 11, the closing element 6 is moved by an angle α in the counterclockwise direction and the closing element 7 is moved by an angle β in the clockwise direction. The chain itself is driven by a central adjustment element 13; 14.

  In FIG. 2, as shown by two arrows I and II, two coke ovens 1 for a large coke oven group are shown in a front view. Both illustrated coke ovens 1 are in different dry distillation conditions (Garungszustand). Since the coke oven 1 shown on the right is at the beginning of the carbonization process or carbonization process, the closing element 6 hardly covers the vent opening 3. In this embodiment, the lever arm 10 is connected to a chain 11 that circulates through a small chain 15. The structure in the region of the vent opening 5 for secondary air is the same. Here, the closing element 7 or its lever arm 10 is connected to a circulating chain 12 via a small chain 16.

  The air supply to the left coke oven 1 is completely cut off, and the lever arm 10 or the chain 15 is dissociated from the circulating chain 11. The closing element 7 for adjusting the secondary air of the coke oven 1 shown on the left is just before closing and is not yet completely closed. As can be seen from the above, each coke oven 1 can be controlled completely independently, despite one common central control.

  A special embodiment of the closure element 6; 7 is shown in FIG. The rotationally symmetric closing element 6 shown in this cross-sectional view has a frustoconical closing head 17 which is fixed to a cylindrical guide rod 18. The guide rod 18 is firmly connected to a spring bridge 19, and the spring bridge 19 is fixed to the coke oven door 2. The guide rod 18 is guided in the guide tube 20 and is connected to the chain 11 circulating through the small chain 15 at the rear end. At the beginning of the carbonization time, the spring of the spring bridge 19 is preloaded by extension, so that the vent opening 3 is largely open. The spring bridge 19 is relaxed by the movement of the circulating chain 11, the closing element 6 is moved towards the coke oven door 2, and the closing head 17 is introduced into the conical vent opening 3. In this case, the preload must be selected so that the vent opening 3 is completely closed after the chain 15 and the spring bridge 19 are relaxed.

It is a front view which shows one Example of a coke oven. It is a front view which shows another Example of a coke oven. It is sectional drawing which shows one Example of the closure element for ventilation openings.

Explanation of symbols

  1 coke oven, 2 coke oven door, 3 vent opening (primary air), 4 flue, 5 vent opening (secondary air), 6 closing element (primary air), 7 closing element (secondary air), 8 hinge, 9 Closing plate, 10 Lever arm, 11 Chain (primary air), 12 Chain (secondary air), 13 Adjusting element, 14 Adjusting element, 15 Chain, 16 Chain, 17 Closing head, 18 Guide rod, 19 Spring bridge, 20 Guide tube

Claims (17)

An air supply device for supplying primary air and secondary air for burning carbonized gas in a carbonization chamber of a coke oven configured as a flat structure and arranged as a furnace group, Each of the carbonization chambers comprises at least one supply opening for primary air and at least one supply opening for secondary air provided in each of the carbonization chambers. Each of the coke oven doors extends through each coke oven door or a wall surrounding the coke oven door, and is further provided with a closure element movably supported for at least a portion of the air inlet opening. In things,
At least a part of the closing element of the air supply opening is mechanically coupled with the adjustment element, the adjustment element being controlled and driven from a central location;
The closure element is operated with a regulating element in connection with the demand for combustion air in the coking chamber;
The individual closing elements and the central adjustment element can be mechanically connected individually, in particular the starting position of the individual closing elements individually at the beginning of the carbonization process or the carbonization process of the associated carbonization chamber, and An air supply device for supplying primary and secondary air, characterized in that it can be set independently of the other closing elements of the adjacent coking chamber.   At least a portion of the primary air closure element is mechanically coupled to the adjustment element, and at least a portion of the secondary air closure element is mechanically coupled to another adjustment element. Item 2. The air supply device according to Item 1.   The air supply device according to claim 1 or 2, wherein the adjusting element is a circulating chain.   4. The air supply device according to claim 1, wherein the adjustment element is a threaded spindle.   5. The device according to claim 1, wherein the closing element is a closing plate, the closing plate being supported such that the closing plate moves substantially parallel to the furnace door when operated by the coupling element. The air supply device according to item.   6. A feeding device according to any one of claims 1 to 5, wherein the closing element is a closing plate which stands vertically and is supported so as to be rotatable in the vertical or horizontal direction about a central axis. Qi device.   The closure element is formed from at least two face members that are mutually overlapping and shiftable relative to each other, the face members being ideally polygonal and point-symmetric or substantially circular when partially open The air supply device according to any one of claims 1 to 5, wherein the cross section is open.   The air supply device according to any one of claims 1 to 5, wherein the closing element has a conical shape, and the tip is directed toward the furnace chamber in the assembled state.   9. An air supply device according to claim 8, wherein the opening has the same opening angle as the associated conical closure element or an opening angle larger than it.   10. Air supply device according to claim 8 or 9, wherein the conical closure element is movable in the direction of the longitudinal axis of the opening, thereby opening the circular ring gap when partly open.   11. The closure element according to any one of claims 1 to 10, wherein the closure element is releasably coupled to the adjustment element such that the closure element is completely disengaged from the adjustment element when the supply opening is completely closed in the end position. The air supply device according to claim 1. A method of supplying combustion air for burning carbonized gas in a carbonization chamber of a coke oven that is configured in a flat structure form and arranged as a furnace group,
Use at least one device according to any one of claims 1 to 11, wherein
A) After emptying and refilling the coking chamber, the closing element is brought into the starting position, where the supply opening is fully or almost fully open, and is connected to the central adjustment element, ,
B) During the carbonization time, the closure element is operated by one or more central adjustment elements to close the vent opening as it is,
C) The carbonization chamber closing element is positioned at the end position at the end of the carbonization time of each carbonization chamber at the latest and dissociated from the control element,
D) A method for supplying combustion air, characterized in that the method shown in a) is started again.   13. A method according to claim 12, wherein the closure element is automatically disengaged from the adjustment element after the vent opening is completely closed.   14. A method according to claim 12 or 13, wherein the central control element is operated continuously during the total carbonization time and at a substantially constant average speed or control frequency.   15. Any of claims 12 to 14, wherein at least one central adjustment element is provided for the primary air closure element and at least one central adjustment element is provided for the secondary air closure element. The method according to claim 1.   A central adjustment element for primary air and a central adjustment element for secondary air are operated independently and independently of each other, and operate continuously during the total carbonization time and at a substantially constant average speed or adjustment frequency. Item 16. The method according to Item 15.   12. Use of an apparatus according to any one of claims 1 to 11 for a method of supplying combustion air in a coking chamber of a coke oven which is configured in a flat structure form and arranged as a furnace group.

Images