WO2017153369A1 - Frame for suctioning filling gases and transferring same into the gas collection chamber of the oven chamber of a stamping battery during the setting of a stamped cake in the oven chamber, with reduction of the filling emissions - Google Patents

Abstract

The invention relates to a device for suctioning and transferring filling gases from a gas collection chamber (24) of a coke oven chamber (2), the device comprising at least one suction hole (25), which is arranged on the gas collection chamber (24) and via which the filling gases can be suctioned from the gas collection chamber (24), and comprising a frame (1) for arranging at a loading opening (21) of the coke oven chamber (2), wherein the frame (1) forms pressure relief channels (12), and wherein the pressure relief channels (12) are fluidically connected to the at least one suction hole (25). The invention further relates to a method for preventing filling emissions during the setting of a stamped cake (3) into a coke oven chamber (2).

Description

 Frame for sucking and passing of filling gases in the gas collection chamber of the furnace chamber of a stamped-battery during the setting of a tamping cake in the furnace chamber, with reduction of Füllemmissionen

description

The invention relates to a device for sucking and passing over

Filling gases from a gas collection chamber of a coke oven chamber according to the

The preamble of claim 1, and a method for preventing filling emissions during setting of a tamping cake according to

The preamble of claim 9. Such a device is known for example from DE 1 161 847 B.

In the lateral loading of horizontal coke oven chambers, such as the coke ovens of a coke battery, the fuel is often tamped before insertion into the coke oven chamber. This gives a compacted coal cake, which is then moved into a lateral feed opening of the coke oven, for example on a setting plate.

Since the coke oven chambers are heated continuously, there is the problem in the feed that the interior of the coke oven chamber is at a high temperature, so that at the surface of the tamping cake when entering the hot coke oven chamber, a mixture of gases, vapors and dusts at the Surface of the tamping cake is formed, which leads to an increased pressure in the chamber and penetrates through the feed opening to the outside. The gases form a dense smoke, which at the exit from the

Feed opening can severely obstruct the work on the machine side of the oven and is detrimental to health. Since the filling gases contain combustible components, there is also the risk of stinging flame. The contained soot and dust leads to heavy pollution of the environment and atmosphere. In addition, valuable raw materials and residual gases of high calorific value can be obtained from the filling gases. The fullest possible detection of the filling gases is therefore not only health and

safety-relevant view, but also economically advantageous. It is therefore customary to allow the filling gases to escape from the furnace chamber space through a riser pipe of the furnace chamber when the coke oven chamber is charged or to suck it off. A corresponding suction device for a furnace battery is described for example in DE 1 161 847 B. However, this solution is insufficient. On the one hand, there is the problem that even at high

Suction capacity of the discharge of filling gases through the charging opening can not be completely prevented. In addition, it comes in the

Loading process of the coke oven chamber to a considerable

False air entry, which leads to an undesirable cooling of the coke oven chamber.

From WO 99/00465 AI a device for preventing the escape of filling gases during charging is known, in which on the outside of the feed opening a sealing frame with door-shaped sealing elements

is provided, which invest in the feed to the tamping cake and seal the coke oven chamber during the charging against the outside environment.

This results in the one hand, the problem that the sealing effect may be insufficient in a ram cake with irregular surface.

On the other hand, the ramming cake can be damaged by the mechanical contact with the sealing elements, since the sealing elements against the

Pound cake must be pressed. This creates an elevated

Cabbage waste, which must be collected after the feed and must be recycled.

The invention is therefore an object of the invention to provide an improved device for the suction of filling gases, which effectively suppresses the formation of filling emissions and low cost, without damaging the rammed cake.

This object is achieved by a device for suction and passing of filling gases from a gas collection chamber of a coke oven chamber according to claim 1 and a method for preventing filling emissions during the setting of a tamping cake according to claim 9. In particular, the object is achieved by a device for suctioning and passing of filling gases from a gas collection chamber of a coke oven chamber, comprising at least one suction hole, which is arranged on the gas collection chamber and through which the filling gases are sucked out of the gas collection chamber, wherein the device has a frame for arrangement a feed opening of the coke oven chamber, the frame forming pressure relief passages, and wherein the pressure relief passages with the at least one suction hole

fluidly connected.

An advantage of the invention is that by the interaction of the

Suction hole and the structurally easy to implement pressure relief channels at the feed opening directly at the point of exit, the emission of the filling gases can be effectively prevented. The device is characterized by a simple structure. Only one (often already existing) suction hole and an easy-to-produce frame are needed. The frame that the

Detecting and preventing emissions at the feed opening does not involve any active technical devices, but is completely passive. The frame is simple and inexpensive to manufacture. It only has to be adapted to the dimensions of the loading opening. This is the result

Inventive device very flexible and universally applicable to any coke ovens. The emission suppression is non-contact against the stamping cake, so that its surface is not damaged. Since the frame thus does not come into contact with the tamping cake and also has no moving elements, the device according to the invention is very susceptible to damage and reliable in operation.

In a preferred embodiment, the frame has a transfer passage which fluidly connects the pressure relief passages and the gas collection chamber. This creates a structurally simple fluid connection between the pressure relief channels and the gas collection chamber. For example, in one embodiment, the pressure relief passages may be provided as vertical channels on the sides of the feed opening. These preferably extend over the entire height of the feed opening. In this case, the

Überleitkanal be arranged at the upper end of the pressure relief channels, so that the filling gases rise directly into the transfer channel. It is further preferred that the frame has sealing elements for sealing against the edge of the charging opening. This creates a seal of the pressure relief channels against the atmosphere and further increases the efficiency of the device.

Preferably, the device comprises a box profile which can be arranged with a side surface on the frame for sealing the device from the outside. Thus, a further improvement of the seal can be achieved. In a

Embodiment, the box profile may be formed by a ramming frame in which the ram cake has been stamped. The dimensions of the side surface of the box profile, which can be arranged on the tamping cake from the outside, are preferably equal to or greater than the dimensions of the corresponding

Side surface of the tamping cake. Is the ram cake completely in the

Introduced coke oven chamber, the box profile covers the opening of the frame and thus blocks the feed opening, so that the emission of filling gases is further suppressed.

It is further preferred that the frame is made of a metal, for example cast metal or steel sheet. This allows a simple and inexpensive production. In addition, it ensures that the frame withstands the high temperature differences that occur in the feed.

It is preferred that at the at least one suction hole, a suction device for the extraction of filling gases from the Gassammeiraum is attached.

Preferably, a cross-sectional area of the pressure relief passages is in a range between 0.02 m ² and 0.25 m ² . If the cross-sectional area is smaller, the volume provided for the escape of the filling gases is too small and the efficiency of the device is impaired. For larger cross-sectional areas than the specified range increases the required suction power and thus the operating costs. Since in Koksofenbatterien the individual coke oven chambers are arranged close to each other, too large cross-sectional areas are not feasible for reasons of space.

Preferably, the Gassammeiraum is limited by a furnace roof of the coke oven chamber. As the resulting hot gases rise, the volume below the furnace roof is an advantageous choice for the gas collection room. Is like previously described, in one embodiment, the transfer duct disposed at an upper end of vertical pressure relief passages is a

Fluid connection with the Gassammeiraum also easy to implement.

It is further preferred that the at least one suction hole is arranged in the furnace roof and that a distance between the at least one suction hole in the furnace ceiling and a front edge of the furnace roof at the feed opening of the coke oven chamber in a range between 0.5 m and 5.5 m lies. If the distance is too short, the suction in the pressure relief channels may be too irregular. If the distance is too large, a correspondingly high suction power must be applied in order to maintain a sufficient negative pressure in the pressure relief channels. This leads to higher ones

Operating costs and technical requirements for the used

Suction device.

The invention also provides a method for preventing filling emissions during the setting of a tamping cake. The method according to the invention comprises the following steps:

 - Suction of air from the coke oven chamber by at least one opening into the interior of the coke oven chamber suction hole;

 - generating a negative pressure in pressure relief channels, which are formed on a frame of a feed opening of the coke oven chamber;

 - Place the tamping cake through the frame into the loading opening.

By the sealing method of the present invention, leakage of filling gases through the charging port into the atmosphere can be effectively suppressed. Filling gases that exit through the feed opening are sucked in by the negative pressure in the pressure relief channels. This prevents emission of filling gases without requiring mechanical contact with the tamping cake. This effectively prevents damage to the tamping cake while at the same time preventing filling emissions.

Preferably, the negative pressure generated in the pressure relief passages is in a range between -50 Pa and -500 Pa. This ensures that the negative pressure is sufficiently high to suck the filling gases into the gas collecting chamber without the filling gases escaping to the atmosphere. A heavier vacuum would unnecessarily increase energy consumption. Preferably, when setting the tamping cake, a box member is provided at the end of the tamping cake facing away from the loading opening, which seals the pressure relief channels after complete setting of the tamping cake against the outside. If the charge is such that the ram cake is introduced on a setting plate, which may be formed for example by a bottom plate of the ramming frame, the box element can also serve in addition to the sealing function, the rammed cake at

Pulling out the set plate to hold back. This will be the

Loading process simplified.

Further preferably remains in setting the tamping cake in the

Coke oven chamber on both side surfaces and the top of the tamping cake each have a gap between the frame and the tamping cake, whose width is in a range between 0 mm and 30 mm. This ensures that the feed takes place without touching the frame. If the gap is too large, the sealing effect with respect to the atmosphere decreases.

It is further preferred that filling gases, which are sucked through the at least one suction hole when setting the tamping cake, are passed via a riser pipe into a gas reservoir and / or via a transfer tube into a neighboring furnace connected thereto. When the gases are supplied to the gas feedstock, valuable raw materials can be obtained by gas scrubbing. Alternatively, the filling gases can first be passed into the gas collection chamber of a neighboring furnace in which little gas is released at this time. The filling gases can then be sucked out of this adjacent furnace via an associated riser and fed to a treatment plant and / or the gas feed.

The invention will also be described in terms of further features and advantages based on embodiments, which are explained in more detail with reference to the drawings.

Hereby show:

Fig. 1 shows a schematic horizontal section through a coke oven chamber with a device for sucking off and passing over filling gases according to an embodiment of the invention; Figure 2 is a schematic vertical section through the coke oven chamber with the device for sucking and passing over filling gases according to the embodiment of the invention.

Fig. FIG. 3 is a perspective view of the frame of the filling gas evacuation and transfer device according to the embodiment of FIG

 Invention.

In Fig. 1 is a horizontal section through a coke oven chamber with a device for sucking and passing of filling gases according to a

Embodiment of the invention shown. The coke oven chamber 2 has a typical elongated shape along the feed direction shown in FIG. 1 runs from right to left. At the right end of the coke oven chamber 2 (the machine side), a feed opening 21 is arranged. By the

Feed opening a ram cake 3 has been introduced, which is completely received in the coke oven chamber 2. The coke oven chamber 2 is bounded on its sides by furnace walls 22. The furnace walls 22 are along the

Feeding direction conical, so that the coke oven chamber 2 on the feed opening 21 facing away from the coke side is wider than on the

Machine side. As a result, the finished coke can be pushed out of the furnace walls 22 with reduced friction.

An essential element of the device according to this embodiment is a frame 1, which in Fig. 1 is shown on the right. The frame is arranged at the feed opening 21 and framed this. The frame has sealing elements 11. They are formed in the embodiment shown by plate-shaped elements which abut against the edge of the feed opening 21 on a wall of the coke oven chamber 2. The sealing elements 11 are provided on the wall-facing side with a (not shown) sealing material through which the frame 1 against the edge of the feed opening 21st

is sealed.

At the sealing elements 11 pressure relief channels 12 are arranged. They are located on the sides of the feed opening 21 and each close an air space on both sides of the feed opening 21, which extends vertically over the entire height of the coke oven chamber 2. The in Fig. 1 shown Cross-sectional area of each pressure relief channel 12 is between 0.02 m ² and 0.25 m ² . The pressure relief channels 12 are followed by side plates 15, which project from the frame 1 perpendicular to the front.

In Fig. 2 is a schematic vertical section through the coke oven chamber with the device for sucking and passing of filling gases according to the

Embodiment of the invention shown. The coke oven chamber 2 is bounded above by a furnace roof 23. Between the top of the tamping cake 3 and the furnace roof a gas collection chamber 24 is formed, in which can accumulate in the charge resulting filling gases. In the furnace roof 23 suction holes 25 are formed. In the suction holes 25 (not shown) intake pipes, transfer tubes or risers are used to the filling gases from the

Discharge gas collection chamber 24. The distance between the front edge of the furnace roof 23 at the feed opening 21 and the nearest suction hole 25 is between 0.5 m and 5 m.

The frame 1 includes the pressure relief passages 12 which extend in the vertical direction on the two sides of the Beschickungsöffnu ng 21 over its entire height. The pressure relief channels 12 are fluidly connected at their upper end with a transfer channel 13, which in turn is fluidly connected to the gas collection chamber 24. Thus, the pressure relief channels 12 with the

Gas collecting chamber 24 fluidly connected.

In Fig. 3 is a perspective view of the frame 1 of the device for sucking and transferring filling gases according to the embodiment of the invention shown from the machine side. The tamping cake 3 is received in the coke oven chamber 2, its rear end is visible. The already in Fig. 1 shown lateral, forwardly projecting side plates 15 of the frame 1 are each arranged in line with the lateral corners of the feed opening 21, which is indicated by a dotted line. At the top, the opening defined by the frame 1 is limited by the pressure relief passage 13. Another, horizontally extending upper plate 15a is disposed at the lower end of the pressure relief passage 13 and framed with the side plates 15, the opening of the frame 1 a. The frame 1 thus limits an area which is only slightly larger than a cross section of the tamping cake 3 perpendicular to the loading direction. A gap x, which remains at the feed between the side surfaces of the tamping cake 3 and the frame 1, is in Fig. 1 shown. Its width is on both sides of the tamping cake between 0 mm and 30 mm. The limited by the upper plate 15a height of the opening of the frame 1 is also only slightly larger than the height of the tamping cake 3. In the feed remains between the top of the tamping cake 3 and the upper plate 15a also a gap whose width between 0 mm and 30 mm.

A loading process will now be described. In the in Fig. Suction holes 25 shown in FIG. 2 are suction devices 26 (not shown) which suck air from the coke oven chamber 2 and thus generate a negative pressure. In the pressure relief channels 12, which are fluidly connected to the suction holes 25, also creates a negative pressure. This is in the Dichtentlastungskanälen between -50 Pa and -500 Pa.

When feeding the rammed cake 3, on a (not shown) setting plate in the coke oven chamber 2 is inserted. Since the cross-sectional area of the tamping cake 3 is only slightly smaller than the opening area of the frame 1, the tamping cake 3 seals the opening of the frame 1 against the atmosphere without coming into contact with the frame 1.

Part of the filling gases produced during charging increase in volume

Coke oven chamber 2 up in the gas collection chamber 24 and is sucked directly from there. Filling gases, which escape through the feed opening 21, flow past the side surfaces of the tamping cake 3 into the pressure relief channels 12. The filling gases can not penetrate through the narrow openings between the tamping cake 3 and the sheets 15, 15 a of the frame 1 to the outside, but by sucked the negative pressure in the pressure relief channels 12 via the transfer passage 13 into the gas collection chamber 24, as indicated in Fig. 2 with arrows.

The suctioned through the suction holes 25 filling gases can be passed through risers in a gas or gas treatment plant, or be routed by means of transfer pipes in adjacent neighboring furnaces.

When loading a box section 14, which is shown in Fig. 1, arranged at the back of the furnace facing away from the tamping cake 3 and guided with the tamping cake 3 with. The box section 14 is shown in FIG Embodiment, a frame member into which the rammed cake 3 was added during stamping. The front surface of the box profile 14, which is arranged on the furnace-facing surface of the tamping cake 3, is substantially congruent with the furnace-facing surface of the

Tamping cake 3. Once the rear end of the tamping cake 3 the

Pressure relief channels 12 has happened and the rammed cake thus no longer seals the frame 1, the box section 14 seals the pressure relief channels 12 and the transfer channel 13 against the atmosphere.

The box section 14 is attached to the rammed cake 3 adjacent to the feed, until the ram cake 3 is completely set. Now that will be

Setting sheet under the tamping cake 3 withdrawn, while the box section 14 remains adjacent to the back of the tamping cake 3. That is how it works

Pound cake 3 held by the box section 14 in the coke oven chamber 2 and the setting plate can be easily removed.

Before the coke oven chamber 2 is closed, the frame 1 is removed from the feed opening 21. The tamping cake 3 is already completely inserted into the coke oven chamber 2 and rests. The emissions occurring at this time are no longer as high as during the introduction of the

Tamping cake 3, since then occurring by the insertion of the tamping cake 3 inside the coke oven chamber 2 pressure increase (the so-called air pump effect) is no longer present. The then still occurring

Filling gas quantities can be sucked off by the suction devices 26 via the suction holes 25. As a result, the remaining emissions are greatly reduced before closing the furnace door.

LIST OF REFERENCE NUMBERS

I frame

 II sealing elements

 12 pressure relief channels

 13 transfer channel

 14 box profile

 15 side plates

15a upper sheet Coke oven comb he loading port furnace wall

furnace roof

Gas collection room Suction hole

Suction devices pound cake

Claims

claims 1. Device for sucking and passing of filling gases from a  Gas collecting chamber (24) of a coke oven chamber (2), comprising at least one suction hole (25) which is arranged on the gas collecting chamber (24) and via which the filling gases are sucked out of the gas collecting chamber (24)  a frame (1) for placement on a feed opening (21) of the coke oven chamber (2),  the frame (1) forming pressure relief channels (12), and  wherein the pressure relief channels (12) with the at least one  Suction hole (25) are fluidly connected. 2. Apparatus according to claim 1,  d a d u rc h e ke n ze i c h n et that  the frame (1) has a transfer channel (13), which the  Pressure relief channels (12) and the gas collection chamber (24) fluidly connects. 3. Apparatus according to claim 1 or 2,  d a d u rc h e ke n ze i c h n et that  the frame (1) has sealing elements (11) for sealing against the edge of the charging opening (21). 4. Device according to one of the preceding claims,  marked by  a box profile (14) which can be arranged with a side surface on the frame (1) for sealing the device from the outside. 5. Device according to one of the preceding claims,  d a d u rc h e ke n ze i c h n et that  the frame (1) made of a metal, such as cast metal or Sheet steel, is made. 6. Device according to one of the preceding claims,  d a d u rc h e ke n ze i c h n et that a cross-sectional area of the pressure relief passages (12) is in a range between 0.02 m ² and 0.25 m ² . 7. Device according to one of the preceding claims,  d a d u rc h e ke n ze i c h n et that  the gas collecting chamber (24) is delimited by a furnace roof (23) of the coke oven chamber (2). 8. Apparatus according to claim 7,  d a d u rc h e ke n ze i c h n et that  the at least one suction hole (25) is arranged in the furnace roof (23) and that a distance between the at least one suction hole (25) in the furnace roof (23) and a front edge of the furnace roof (23) on the  Feed opening (21) of the coke oven chamber (2) is in a range between 0.5 m and 5.5 m. 9. A method for preventing filling emissions during the setting of a tamping cake (3) in a coke oven chamber (2), in particular using a device according to one of claims 1 to 8, comprising the following steps:  - Suction of air from the coke oven chamber (2) by at least one in the interior of the coke oven chamber (2) opening out suction hole (25);  - generating a negative pressure in pressure relief channels (12) formed on a frame (1) of a feed opening (21) of the coke oven chamber (2);  - Setting the tamping cake (3) through the frame (1) in the  Feed opening (21). 10. The method according to claim 9,  d a d u rc h e ke n ze i c h n et that  the negative pressure generated in the pressure relief passages (12) is in a range between -50 Pa and -500 Pa. 11. The method according to claim 9 or 10, therefore, et al when the tamping cake (3) is set, a box element (14) is provided at the end of the tamping cake (3) facing away from the feed opening (21), which closes off the pressure relief channels (12)  complete setting of the tamping cake (3) seals against the outside. 12. The method according to any one of claims 9 to 11,  d a d u rc h e ke n ze i c h n et that  when setting the tamping cake (3) in the coke oven chamber (2) on both side surfaces and the top of the tamping cake (3) in each case a gap (x) between the frame (1) and the tamping cake (3) remains, whose width in a range between 0 mm and 30 mm. 13. Method according to one of the claims 9 to 12,  d a d u rc h e ke n ze i c h n et that  Filling gases, which are sucked when setting the tamping cake (3) through the at least one suction hole (25), are passed via a riser into a gas reservoir and / or via a transfer pipe in a neighboring furnace connected thereto.