DE102009052502A1 - Method for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process - Google Patents

Abstract

The invention relates to a method for sucking off flue gases from a coke oven chamber, wherein the flue gases, which arise briefly during the squeezing and loading process of the coke cake from the coke oven chamber, are sucked off by a generated in the gas space above the coke cake vacuum, and this vacuum in the gas space is generated in an advantageous embodiment in the Sekundärheizraum, which in turn can be sucked by way of example from a vacuum reservoir, the for the duration of opening the Koksofenkammertüren on the Opening of shut-off devices in the connecting line is connected to the Sekundärheizraum. The inventive method avoids the undesirable emission of flue gases into the atmosphere. The invention also relates to a device with which this method is carried out.

Description

The invention relates to a method for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process, are sucked out of a coke oven chamber by the harmful fumes, which arise in particular during the loading and Ausdrückvorganges a coke oven chamber, so that they do not reach the environment. The invention also relates to a device for generating a negative pressure in a coke oven chamber.

The production of coke often occurs in coke oven chambers which are loaded horizontally, the loading being followed by the coking process which produces a usable coke from coal. Above the coke cake, a carbon-free space is present in this embodiment to ensure the trouble-free outgassing of coking gases. The coke oven gas escaping from the coal when heated is collected in this carbon-free space and burnt with the ingress of air. To ensure even heating of the coke cake from all sides, the partially burned coking gas is routed in special channels located in the sidewalls of the coke oven chambers to secondary heating chambers located below the actual coke oven chamber. There it is completely burned under the admission of another air quantity. As a result, the coke cake is also heated from below and thus from all sides. Coke ovens of this type are called "heat recovery" or "non-recovery" coke ovens, depending on the use of the heat of combustion. Typical embodiments can be found in the US 4344820 A or in the US 4287024 A ,

The operation of the coke oven chambers is usually cyclic. After a certain period of time, the coking is completed and the coke is removed from the coke oven chamber. This is done in a cycle of squeezing, whereby the coke gets into a cart for onward transport or into a cooling device. The coke oven chamber is then reloaded with fresh coal. Since a coke oven chamber usually holds only a limited amount of coal, several coke oven chambers are combined to form a coke oven bank. This allows the coke production to be continuous.

In the process of squeezing and loading, the coke oven doors must be opened. If the oven doors are opened prematurely by way of example, unburned flue gases pass through the open doors or the primary air openings into the environment. Following emptying, the ovens are again loaded with non-preheated coal. Due to the high furnace chamber temperature of 1100 ° C to 1400 ° C, the loading process spontaneously initiates intensive development and combustion of raw gas. This explains the large amount of flue gases at the beginning of the coking process. These can pass unhindered into the open in conventional constructions, since otherwise the negative pressure prevailing in the combustion chamber with closed doors can not be maintained during loading due to the open doors. The amount of flue gas escaping during the loading process also places a burden on the environment and endangers the operating personnel. For this reason, there are many attempts in the prior art to avoid this undesirable escape of flue gases.

The US 3844901 A describes a device for extracting dusty hot gases consisting of a tapered roof supported by buttresses, the top of the roof being above the source of the emissions, and a thermal expansion zone formed by the top zone of the roof, wherein in the upper zone of the roof, a suction channel which extends over the entire length of the roof and whose cross-section widens towards the suction source, and the suction channel is provided with bulge openings to ensure a uniform suction vacuum over the entire length of the suction channel , The structure is claimed for all processes and chemical processes, but is particularly suitable for horizontal coke oven chambers, with the roof located above the coke oven chamber door, so that the emission of flue gases takes place in the roof, in the top of which the opening of the suction channel is located. The roof runs along the entire front of the coke oven chamber. The construction is stationary and requires a lot of space in front of the coke oven chamber doors, which is not available for coke oven loading machines, for example.

The GB 365934 A describes coke oven chambers having a gas collection chamber above the coke cake, the coke cake being provided with openings through openings in the coke oven chamber ceiling, through which the gases exiting during coking are withdrawn, which are sucked via a connecting pipe into a gas collection pipe, which is connected to all coke oven chambers , And there are devices for controlling the pressure between the connecting pipe and the gas collecting pipe. In one embodiment of the invention, the pressure in the gas collecting space above the coke cake is adjusted by adjusting the suction pressure to the particular stage of the coking process.

An exhaust of the flue gases during expressing and loading is not described. In addition, the application of channels in the coke cake before the coking process is expensive. It It would therefore be advantageous to carry out the flue gas emerging during the squeezing and loading by means of a negative pressure which is applied during the process in the gas space above the coke oven chamber. The generation of negative pressure in the primary and Sekundärheizraum is already described above. The vacuum must be regulated to exhaust the flue gas, since the vacuum is only temporarily increased for this purpose.

The GB 447036 discloses a process for the distillation and coking of coal which are heated in coking retorts, these coking retorts being arranged in rows to coke oven benches, the coal being progressively heated to be dried and distilled until it reaches a temperature of 600 ° C has, whereby this is cooled. The retorts may be provided with vertical heat transport channels, which may also be used to extract the coking gases by a vacuum, which in one embodiment of the method are connected to the flue gas channels below the coking retort. In this way, a negative pressure can be sucked into the gas space of the coking retort via the flue gas ducts. As a result, a coking coal with controlled utilization of the coking gases can be achieved. A process step for the special suction of the flue gases during the expressing and loading is not described.

The regulation of negative pressure in a coke oven chamber is described above. The EP 1230321 B1 describes a method for the discharge of hot raw gases, which arise when coking in furnace chambers of a coke oven battery, the raw gases are withdrawn at a temperature of 600 to 1000 ° C from the furnace chambers and introduced without lowering the raw gas temperature in a hot gas template, and the pressure in the furnace chambers measured and controlled independently of the pressure level of the hot template by shut-off and throttle bodies, which are arranged in the hot gas flows between the Rohgasauslaß the furnace chambers and the hot template, and whose position is controlled in dependence on the measured in the associated furnace chamber pressure, and the gas is supplied from the hot gas feed to a steam boiler control or a cracking reactor. By virtue of the method according to the invention, the hot raw gases produced during the coking can be supplied to complete combustion or splitting without further treatment and without lowering the raw gas temperature, without the coking process in the furnace chambers being influenced thereby. The hot gas template is held to generate the vacuum under a slight negative pressure. The method does not disclose a process step of rapidly exhausting flue gases during the loading and ejection process.

The said methods or devices have the disadvantage that a special process step for the suction of the gases is not provided. However, this process step must be specially provided for this purpose, because only at the time of squeezing and loading significant amounts of pollutant flue gas get into the open by opening the coke oven chamber doors.

It is therefore an object to provide a method which, by generating and regulating a higher compared to normal operation in the furnace vacuum within the coke oven chamber to suck back the resulting during the squeezing and loading flue gas into the coking chamber. Under increased negative pressure is to be understood compared to the atmospheric pressure further reduced pressure. The extraction must be carried out in such a way that a relatively high negative pressure is available within a short period of time, so that the extraction is complete and emission-free.

It would also be advantageous if no constructions on the coke oven chamber ceiling are required, since the space on the coke oven chamber ceiling is often used for ventilation devices. Also constructions for filling, cleaning or process control can be provided on the coke oven chamber ceiling, if the local space is not needed for the suction device.

The invention solves this problem by an intake system for negative pressure, which performs the suction through the Sekundärheizraum via channels through the side walls, so that in the gas space above the coke cake, which is also called Primärheizraum, for the duration of opening the Koksofenkammertüren and the expressing and Loading the coke or coal cake, an increased negative pressure in the furnace is generated.

This can be done by way of example by means of a special suction device, which is connected on the suction side to the channels. The pressure in the Primärheizraum is lowered in this way when opening the coke oven chamber doors, so that the flue gases that arise during the pressing after opening the doors, instead of going outside, are sucked into the interior of the Primärheizraumes. By this procedure and consequent device space is needed neither on the coke oven chamber nor in front of the coke oven chamber doors.

• • die Verkokungskammer für die Verkokung mit einer Schicht Kohle befüllt wird, wodurch Rauchgase erzeugt werden, und
• • nach der Befüllung die Kohle zur Verkokung erwärmt wird, und
• • diese flüchtigen Kohlebestandteile mittels unterstöchiometrisch zugeführter Luft direkt oberhalb der Kohleschüttung in einem dafür vorgesehenen Gasraum partiell oxidiert werden, und unterhalb der Verkokungskammer ein Verbrennungssystem zur Verbrennung von unverbrannten, flüchtigen Kohlebestandteilen sowie den bei der partiellen Oxidation erzeugten Gasen angeordnet ist, und
• • die Verkokungskammer in den Seitenwänden Kanäle enthält, und diese Kanäle den oberen, koksfreien Teil der Verkokungskammer gasseitig mit dem Verbrennungssystem unterhalb der Verkokungskammer verbinden, und welches dadurch gekennzeichnet ist, dass
• • durch diese Kanäle in dem Gasraum über dem Kohlekuchen ein Unterdruck erzeugt wird, der dazu dient, die während des temporären Befüllens oder Ausdrückens entstehenden Rauchgase aus dem Gasraum abzusaugen.

In particular, a method for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process, wherein

• • the coking chamber for coking is filled with a layer of coal, which generates flue gases, and
• • after filling the coal is heated to coking, and
• • these volatile carbon constituents are partially oxidized by means of substoichiometric air directly above the coal bed in a dedicated gas space, and below the coking chamber, a combustion system for combustion of unburned, volatile coal components and the gases produced in the partial oxidation is arranged, and
• The coking chamber in the side walls contains channels, and these channels connect the upper coke-free part of the coking chamber on the gas side to the combustion system below the coking chamber, and which is characterized in that
• • By these channels in the gas space above the coal cake, a negative pressure is generated, which serves to suck the resulting during temporary filling or squeezing flue gases from the gas space.

For advantageous embodiment of the invention, the suction is started 5 minutes before the opening of the coke oven chamber doors and 30 minutes after closing the coke oven chamber doors ended. This ensures optimal extraction of the flue gases from the coke oven chamber. In an exemplary embodiment of the invention, suction is continued for up to 4 hours after closing the doors. The flue gases can be sooty.

In a simple embodiment, it is conceivable to apply the negative pressure directly to the channels in the side walls, so that the channels are connected to the suction side of a suction device and thus a negative pressure in the primary heating chamber is formed, the coke oven chamber is in the suction direction end. Advantageously, however, the negative pressure is lowered in the Sekundärheizraum, which is located below the coke oven chamber, so that this negative pressure is sucked through the channels in the side walls, the so-called "downcomer" channels in the Primärheizraum, the coke oven chamber is in the suction direction end ,

Typical negative pressures required to exhaust the flue gases completely are -20 to -50 Pa in the primary boiler room near the coke oven chamber doors. In order to achieve this negative pressure, the exhaust gas design from the Sekundärheizraum and the air supply can be temporarily shut off in the Primärheizraum. In some embodiments of the method according to the invention, negative pressures of up to -120 Pa can also be achieved. The extracted according to the invention flue gas can be used arbitrarily.

It is favorable in another embodiment, for example, to use a vacuum reservoir, which is connected when opening the doors of the coke oven chamber via a valve to be opened with the Sekundärheizraum, thereby characterized in the gas space above the Kokkokuchen within a short time, a negative pressure is generated the coke oven chamber is in the suction direction end. In this way, therefore, the negative pressure in the gas space above the coke cake is sucked through the channels from the Sekundärheizraum.

The vacuum reservoir is then under increased negative pressure and is briefly connected to the opening of the coke oven chamber door with the Sekundärheizraum. As a result, the negative pressure in the Primärheizraum is sufficient to reliably prevent leakage of gases from the coke oven chamber. The negative pressure in the combustion system below the coking chamber is thus generated by a vacuum reservoir, which is connected to the Sekundärheizraum via a lockable secondary line, which is briefly connected for the process of aspiration with the Sekundärheizraum, so that via the channels, a negative pressure in the gas space above of the coke cake is sucked in through the channels. The vacuum collecting container can be separated from the Sekundärheizraum after evacuation by suitable devices and evacuated again.

It is also possible to generate the negative pressure in the combustion system below the coking chamber by a blower, which sucks the negative pressure in the combustion system below the coking chamber via separate channels. The negative pressure may then be controlled by a device controlling the fan in the power. A storage container is not mandatory for this purpose.

• • eine Koksofenkammer, die mit einem zur Verkokung vorgesehenen Kokskuchen beladbar ist, wobei sich oberhalb des Kokskuchens ein Gasraum befindet, in dem die zur Verkokung vorgesehene Kohle nach der Befüllung erwärmt wird, und
• • sich in den Seitenwänden Kanäle befinden, die zum Ansaugen eines Unterdruckes geeignet sind, und
• • sich unterhalb der Verkokungskammer ein Verbrennungssystem zur Verbrennung von unverbrannten, flüchtigen Kohlebestandteilen sowie den bei der partiellen Oxidation erzeugten Gasen befindet, und
• • die Verkokungskammer in den Seitenwänden Kanäle enthält, und diese Kanäle den oberen, koksfreien Teil der Verkokungskammer gasseitig mit dem Verbrennungssystem unterhalb der Verkokungskammer verbinden, und welche dadurch gekennzeichnet ist, dass
• • das Verbrennungssystem unterhalb der Verkokungskammer mit auswärtsführenden Sekundärkanälen ausgestattet ist, durch die das Verbrennungssystem mit einem Unterdruck beaufschlagbar ist, so dass
• • der Gasraum über dem Kokskuchen über das Verbrennungssystem und die Kanäle mit einem Unterdruck beaufschlagbar ist, und
• • mindestens einer der auswärtsführenden Sekundärkanäle mit einer regelnden Vorrichtung ausgestattet ist.

Claimed is also a device for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process, comprising

• • a coke oven chamber, which can be loaded with a coke cake intended for coking, with a gas space above the coke cake, in which the coking coal is heated after filling, and
• • There are channels in the side walls that are suitable for drawing in a vacuum, and
• • there is a combustion system below the coking chamber for the combustion of unburned volatiles and the gases produced by the partial oxidation, and
• The coking chamber in the side walls contains channels, and these channels connect the upper coke-free part of the coking chamber on the gas side to the combustion system below the coking chamber, and which is characterized in that
• The combustion system below the coking chamber is equipped with outgoing secondary ducts, by means of which the combustion system can be subjected to a negative pressure, so that
• • the gas space above the coke cake can be acted upon by the combustion system and the channels with a negative pressure, and
• • at least one of the outgoing secondary channels is equipped with a regulating device.

Depending on the size of the vacuum reservoir or the sucking device in relation to the required vacuum and the shutter mechanism is designed in the connection between the vacuum reservoir and Sekundärheizraum. If the vacuum reservoir is small and designed to accommodate increased negative pressure, the shutter mechanism must open quickly and completely. In this case, a slider is suitable as an example. This opens the secondary channel between Vakuumvorlagebehälter and Sekundärheizraum short and complete, so that on Sekundärheizraum and the intermediate channels sufficient negative pressure in the Primärheizraum arises. If, on the other hand, the vacuum reservoir has a large volume in relation to the required negative pressure, then, for example, a spindle suffices for fine dosing.

Claimed in an embodiment of the device according to the invention for controlling the negative pressure in a coke oven during the Ausdrück- and loading a channel containing a regulating device for the vacuum, which connects the Sekundärheizraum with the suction side of a sucking device, wherein it is in the regulating Device is a slider.

In a further embodiment for controlling the negative pressure in a coke oven chamber during the squeezing and loading process, a channel is claimed which uses a spindle instead of the slider as the regulating device. Finally, in a further embodiment for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading a channel claimed that uses as a regulating device a flap. In principle, however, any regulating device which performs the adjustment of a vacuum in the primary heating chamber through the channels in the side wall via secondary channels in the desired height and time of demand is suitable in principle.

The inventive method and the device used for this purpose have the advantage that when opening the coke oven chamber a short-term negative pressure in the gas space above the coke cake is generated, so that the flue gases that arise during the ejection after opening the doors, instead of going outside be sucked into the interior of the Primärheizraumes, this procedure and the consequent device requires space either on the coke oven chamber ceiling or in front of the coke oven chamber doors. Unwanted emissions into the atmosphere and the release of flue gases, which pose a risk to the environment and personnel, are thus avoided.

The device according to the invention will be explained with reference to two drawings. These drawings are only exemplary embodiments of the construction of the device according to the invention, which is not limited to these embodiments.

1 shows the side view of a coke oven chamber ( 1 ), which has a primary heating room ( 2 ) and a secondary heating room ( 3 ) contains. The gases formed during coking flow into the primary heating space ( 2 ) where they are partially burned and the partially burnt coking gas via ducts ( 4 ) in the sidewalls of the coke oven chamber ( 1 ) or in the coke cake ( 5 ) in the Sekundärheizraum ( 3 ) located under the coke cake ( 5 ) is located. There, it is completely burned, causing the coke cake ( 5 ) is heated from below. The completely burnt coking gas is emitted to an exhaust gas ( 6 ) with shut-off device ( 6a ), which are in an exhaust duct ( 6b ) opens. You can also see the openings ( 4a ) of the "downcomer" channels in the primary heating room ( 2 ), is suctioned through the negative pressure ( 4b ). Are now for expressing and loading the doors ( 7 ) of the coke oven chamber, so is feeding the primary air, here through openings for primary air in the ceiling with a U-shaped cover ( 8th ), via suitable shut-off devices ( 8a ) shut off for primary air. Also the execution of the exhaust gases ( 6 ) from the secondary heating room ( 3 ) is provided by suitable shut-off devices ( 6a ) shut off for exhaust. The closure devices ( 9 ) at the openings for supplying secondary air into the Sekundärheizraum ( 9 ) are closed for this process. The valve ( 10a ), which may be a slider by way of example, for the vacuum reservoir ( 11 ) is opened, whereby via the secondary channel ( 10 ), the secondary heating room ( 3 ) and the Channels ( 4 ) in the primary heating room ( 2 ) A negative pressure is generated. As a result, according to the invention, during the opening of the coke oven chamber doors ( 7 ) the flue gases in the primary heating room ( 2 ) sucked. The vacuum in the vacuum receiver tank ( 11 ) can after the process of sucking with a vacuum pump ( 12 ) via a vacuum line ( 13 ) with shut-off device ( 13a ) are restored.

2 shows the side view of a coke oven chamber ( 1 ), which has a primary heating room ( 2 ) and a secondary heating room ( 3 ), wherein in addition a vacuum-generating and pressure-regulating vacuum line ( 14 ) on the ceiling of the coke oven chamber ( 1 ), as exemplified in the GB 365934 A is described. This serves in particular to the pressure in the coke oven chamber ( 1 ) during operation. For this purpose, located on the roof of the coke oven chamber ( 1 ) a vacuum line ( 14 ), which is connected to all coke oven chambers. This is for attachment to the coke oven chamber ( 1 ) with a holder ( 14a ) Mistake. Via a connecting line ( 14b ) with valve ( 14c ) and pressure control device ( 14d ), the pressure in the primary heating room ( 2 ) of the coke oven chamber ( 1 ) during operation. In this embodiment, the valve ( 14c ) for the connecting line during the suction phase of the vacuum via the "downcomer" tubes ( 4 ), so that the pressure regulator ( 14d ) during the intake phase not to the coke oven chamber ( 1 ) connected. In this embodiment, the doors are ( 7 ) of the coke oven chamber ( 1 ), so that the coke cake ( 5 ) can be expressed. You can still see the wall here ( 7a ) above the coke oven chamber door ( 7 ). According to the invention, during this time of opening of the coke oven chamber doors ( 7 ) via the "downcomer" channels ( 4 sucked a vacuum to the flue gases back into the coke oven chamber ( 1 ) to suck. Instead of U-tube-shaped openings ( 8a ) on the ceiling there are simple openings ( 8c ) with an openable flap ( 8d ) are equipped. The first of the doors ( 7b ) is open for loading, the other ( 7 ) closes the coke oven chamber ( 1 ). You can see here the loading of the coke cake ( 5 ), which has a car ( 16 ) with printing device ( 15a ) he follows. The car ( 15 ) is on rolls ( 15b ), again at ground level ( 16 ) are located. In this embodiment, the exhaust channel ( 6b ) arranged underground, being in front of the shut-off valve ( 6a ) of the exhaust passage of the inlet of the secondary channel ( 10 ) is located. This is provided with a valve which is open here ( 10b ). This will cause the secondary channel ( 10 ) with the vacuum reservoir ( 11 ) and sucked from this a negative pressure. At the end of the suction is located, connected via the Sekundärheizraum ( 3 ) and the "downcomer" channels ( 4 ), the coke oven chamber ( 1 ).

LIST OF REFERENCE NUMBERS

1

coke oven

2

Primärheizraum

3

Sekundärheizraum

4

channels

4a

Openings of the "downcomer" channels

4b

Suctioned negative pressure

5

coke cake

6

exhaust execution

6a

Shut-off device for exhaust gas

6b

exhaust duct

7

coke oven chamber doors

7a

Coke oven chamber wall over the coke oven chamber door

7b

First of the doors ( 7b ), open for loading

8a

Open air holes in the ceiling with U-shaped cover

8b

Shut-off device for primary air

8c

Openings for primary air in the ceiling

8d

Flap for closing the openings for primary air in the ceiling

9

closure devices

9a

Closure devices at the openings for supplying secondary air

10

secondary channel

10a

Shut-off device for the secondary channel

10b

Valve for secondary channel, which is opened here

11

Vacuum storage container

12

vacuum pump

13

vacuum line

13a

Shut-off device for vacuum line

14

vacuum line

14a

Holder for vacuum line

14b

Connecting cable for vacuum line

14c

Valve for connection line

14d

Pressure control device

15

dare

15a

printing device

15b

roll

16

Ground level ground

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4344820 A [0002]
• US 4287024 A [0002]
• US 3844901 A [0005]
• GB 365934 A [0006, 0029]
• GB 447036 [0008]
• EP 1230321 B1 [0009]

Claims (9)

Method for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process, wherein • the coking chamber for coking is filled with a layer of coal, whereby flue gases are generated, and • after filling, the coal is heated to coking, and • these volatile Coal constituents are partially oxidized by means of substoichiometrically supplied air directly above the coal bed in a dedicated gas space, and below the coking chamber a combustion system for combustion of unburned, volatile coal components and the gases produced in the partial oxidation is arranged, and • the coking chamber in the side walls or contains channels in the coke cake or in the side walls and in the coke cake, and these channels connect the upper, coke-free part of the coking chamber on the gas side with the combustion system below the coking chamber, characterized in that ss • through these channels in the gas space above the coal cake, a negative pressure is generated, which serves to suck the resulting during temporary filling or squeezing flue gases from the gas space. Method for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading operation according to claim 1, characterized in that the process for generating the negative pressure begins 5 minutes before opening the doors and 30 minutes after the closing of the doors is terminated. Method for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading process according to one of claims 1 or 2, characterized in that the negative pressure is generated in the combustion system below the coking chamber, the coke oven chamber in the suction direction end, and the negative pressure in the Gas space above the coke cake is sucked through the channels. Method for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading operation according to claim 3, characterized in that the negative pressure in the combustion system is generated below the coking chamber by a blower, the coke oven chamber in the suction direction end, which is the negative pressure in the combustion system below the coking chamber via separate channels sucks, and the negative pressure is controlled by a regulating device. A method for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading process according to claim 3, characterized in that the negative pressure in the combustion system below the coking chamber, wherein the coke oven chamber in the suction direction end, is generated by a vacuum reservoir which communicates with the Sekundärheizraum over a shut-off secondary line is connected, which is briefly connected for the process of suction with the Sekundärheizraum, so that via the channels, a negative pressure in the gas space above the coke cake is sucked. Device for generating a negative pressure in a coke oven chamber during the Ausdrück- and loading process, comprising • a coke oven chamber, which can be loaded with a coke cake intended for coking, with a gas space above the coke cake, in which the coking coal is heated after filling, and • in the side walls or in the coke cake or in the side walls and in the coke cake are channels that are suitable for sucking a negative pressure, and • there is a combustion system below the coking chamber for the combustion of unburned volatiles and the gases produced by the partial oxidation, and The coking chamber contains channels in the sidewalls or in the coke cake or in the side walls and in the coke cake, and these channels connect the upper, coke-free part of the coking chamber on the gas side to the combustion system below the coking chamber, characterized in that The combustion system below the coking chamber is equipped with outgoing secondary ducts, by means of which the combustion system can be subjected to a negative pressure, so that • the gas space above the coke cake can be acted upon by the combustion system and the channels with a negative pressure, and • at least one of the outgoing secondary channels is equipped with a regulating device. Device for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading process according to claim 6, characterized in that it is a slider in the regulating device. Device for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading process according to claim 6, characterized in that it is the regulating device is a spindle. Device for controlling the negative pressure in a coke oven chamber during the Ausdrück- and loading process according to claim 6, characterized in that it is the regulating device is a flap.

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