JP2013510910A - Method for generating negative pressure in coke oven chamber during coke pushing and coal charging process - Google Patents

Abstract

The present invention relates to a method for extracting flue gas from a coke oven chamber, wherein the flue gas generated during the process of discharging the coke cake from the coke oven chamber and charging it into the coke oven chamber. Is extracted by the vacuum created in the top space above the coke cake. This vacuum in the top space above the coke oven chamber is created via a flow path through the side walls of the coke oven chamber or the coke cake. In an advantageous embodiment, a vacuum is generated in the secondary heating chamber, for example extracted again from a vacuum supply tank connected to the secondary heating chamber by opening the connection line shut-off device when the coke oven chamber door is opened. Can be done. The method according to the invention avoids unwanted emission of flue gas into the atmosphere. The invention also relates to an apparatus capable of carrying out this method.
[Selection] Figure 1

Description

  The present invention relates to a method for generating a negative pressure in a coke oven chamber during the coke pushing and coal charging processes, whereby harmful smoke generated particularly during the charging and pushing steps of the coke oven chamber. Road gases are sucked from the coke oven chamber to prevent these gases from leaking into the surrounding environment. The invention also relates to an apparatus for generating a negative pressure in a coke oven chamber.

  Coke is often produced in a coke oven chamber that is charged horizontally, followed by a coking process that produces usable coke from the coal. In this structure type, a coal-free space is provided above the coke cake in order to ensure the generation of coke gas without problems. Coke oven gas that leaks from the coal when heated is collected in this coal-free space and incinerated by introducing air. In order to ensure uniform heating of the coke cake from all sides, the partially burned coke gas is guided into a special flow path located on the side wall of the coke oven chamber and placed below the actual coke oven chamber Passed through the secondary heating space. There, the coke gas is completely incinerated by adding an additional amount of air. Thereby, the coke cake is also heated from below and thus from all sides. This type of coke oven is referred to as a “heat recovery” or “non-recovery” coke oven, depending on the use of combustion heat. Typical structural types are disclosed in U.S. Pat. Nos. 4,344,820A and 4,287,024A.

  In general, the operation of the coke oven chamber is operated periodically and repeatedly. After a certain period of time, the carbonization of coal is finished and coke is removed from the coke oven chamber. This is done during the coke pushing cycle by transferring the coke into the vehicle for further transfer or into the cooling device. Thereafter, new coal is charged again into the coke oven chamber. In general, a coke oven chamber provides capacity for just the coal limit, so several coke oven chambers are integrated to form a coke oven bank. As a result, coke can be continuously produced.

  During the coke pushing and coal charging process, the coke oven chamber door must be opened. For example, if the furnace door opens too early, non-burning flue gas will leak into the surrounding environment through the open door or primary air opening. When the furnace is empty, the furnace is again charged with unpreheated coal. When coal is charged into the furnace, the furnace space is at a high temperature ranging from 1100 ° C to 1400 ° C, so that a large amount of crude gas is generated and incinerated spontaneously. This is due to the large amount of flue gas generated at the start of the coke making process. In conventional structural types, these flue gases can leak into the atmosphere without limit. This is because the negative pressure in the combustion chamber provided with the closed door cannot be maintained if the door is open at the time of coal charging. The amount of flue gas that leaks during the coal charging process is also a burden on the surrounding environment and puts operating personnel at risk. For this reason, the prior art has undergone numerous tests and experiments in an attempt to avoid such undesirable flue gas leaks.

  U.S. Pat. No. 3,844,901A describes a dust-containing hot gas suction device, which has a tapered roof positioned above the discharge source and supported by a support pillar, and an upper area of the roof. A suction channel that is placed in the upper region of the roof and extends over the entire length of the roof, the cross section of the suction channel is widened towards the suction source, The passage is provided with an air intake in order to ensure a constant suction negative pressure over the entire length of the suction flow path. This design is claimed for all methods and chemical processes, but in particular, coke ovens are arranged so that the suction channel opening is located at the tip of the roof and the flue gas is discharged into the roof. Suitable for horizontal coke oven rooms with a roof above the room door. This roof extends along the entire front of the coke oven chamber. This structure is stationary and requires a considerable space in front of the coke oven chamber door, which cannot be used for a coke oven chargeer.

  British Patent No. 365934 describes a coke oven chamber with a free space in the coke cake above the coke cake, in which the coke oven chamber contains a coke oven chamber to recover gas generated during coal dry distillation. A flow path through the ceiling opening is provided, and these gases are sucked into the gas collection pipe connected to all coke oven chambers through the connection pipe, and the pressure is controlled between the connection pipe and the gas collection pipe A device is provided for doing this. In one embodiment of the invention, the pressure in the free space of the furnace above the coke cake is adapted to the relevant stage of the coal carbonization process by adjusting the suction pressure.

  The suction of flue gas during coke pushing and coal charging is not described. Furthermore, it is costly to implement the flow path into the coke cake prior to the coal carbonization process. Thus, it is advantageous to absorb the flue gas generated during coke pushing and coal charging by the negative pressure established in the free space of the furnace above the coke cake during this process. The generation of negative pressure in the primary and secondary heating spaces has already been disclosed in the prior art. The negative pressure must be adjusted for flue gas suction. This is because for this purpose, the negative pressure is increased only for a certain period.

  British Patent No. 447036 discloses a method for distilling and carbonizing coal that has been heated to coking retort, and these coking retorts are arranged in rows to form a coke oven bank. And the coal is gradually heated to dryness and distillation until a temperature of 600 ° C. is obtained, thereby cooling. The retort can be provided with a vertical heat transfer duct that can also be used for suction of coke gas by negative pressure. The heat transfer duct is connected to the flue gas flow path under the coke retort in one embodiment of the process. In this way, negative pressure can be drawn into the free space of the coke making retort furnace via the flue gas flow path. This can achieve coal carbonization with controlled use of coke gas. Process steps for special suction of flue gas during coke pushing and coal charging are not disclosed.

  Adjustment of the negative pressure in the coke oven chamber has also been disclosed in the prior art. EP 1230321 B1 describes a method for discharging hot crude gas generated during coal dry distillation in a coke oven battery, the crude gas being recovered from the furnace chamber at a temperature of 600 ° C. to 1000 ° C. And introduced into the hot gas collection main without lowering the crude gas temperature, and the pressure in the furnace chamber is placed between the outlet of the crude gas from the furnace chamber and the hot gas collection main, A device for blocking and restricting the flow is measured and adjusted separately from the pressure level of the hot gas collection main, its position being controlled as a function of the pressure measured in the assigned furnace chamber, and the hot gas collection main From the steam boiler control or split reactor. The process of this invention affects the high temperature crude gas generated during coal carbonization, without further processing, and without affecting the coke making process in the furnace chamber without reducing the crude gas temperature to full incineration or pyrolysis units. Can be supplied without affecting The hot gas collection main is maintained at a slight negative pressure to create a vacuum. This process does not disclose process steps for rapid inhalation of flue gas during coke pushing and coal charging.

  A drawback of the above-described process or apparatus is that no special process steps are provided for gas aspiration. However, this process step must be provided specifically for this purpose. This is because, when the coke oven door is open, a significant amount of flue gas with contaminants can leak into the atmosphere at the moment of coke pushing and coal charging.

  Accordingly, an object of the present invention is to generate and adjust a negative pressure increased in a coke oven chamber as compared with that during normal operation in the furnace, thereby sucking flue gas generated at the time of coke pushing and coal charging and coke. It is to provide a method for returning to the furnace chamber. The term increased negative pressure should be understood to mean a further reduced pressure compared to atmospheric pressure. The suction must be performed so that a relatively large negative pressure can be used within a short time so that the suction is complete and the discharge is gone.

  The present invention will also have the advantage of not requiring a coke oven chamber ceiling structure, since the coke oven chamber ceiling space is often utilized in devices that function as vents. If the space in the coke oven chamber ceiling is not needed for the suction device, a structure for charging, cleaning, or process control may be provided on the coke oven chamber ceiling.

  The present invention addresses this issue by increasing the negative during the period during which the coke cake or coal cake is pushed and charged in the free space of the furnace above the coke cake, also called the primary heating space, with the coke oven chamber door open. This is solved by a negative pressure suction system that suctions from the secondary heating space through the flow path through the side walls so that pressure is generated in the furnace.

  This can be achieved, for example, by means of a special suction device connected to the flow path on the suction side. When the coke oven chamber door is open, the pressure in the primary heating space is thus reduced, and instead of the flue gas generated during coke pushing after the door is opened, leaking into the atmosphere, It is sucked into the heating space. With this method and associated apparatus, no space is required either in the coke oven chamber ceiling or in front of the coke oven chamber door.

The claim is a method for generating a negative pressure in a coke oven chamber, in particular during the coke pushing and coal charging processes,
-The coke oven chamber is filled with a layer of coal for coal carbonization, which produces flue gas,
-After coal charging, the coal is heated for coal carbonization,
-These volatile coal components are partially oxidized by non-combustible volatiles by semi-stoichiometrically supplied air immediately above the coal charge in the free space of the furnace intended to serve this purpose A combustion system for burning the coal components as well as the gas produced during partial oxidation is located under the coke oven chamber,
In the method of having a flow path on the side wall of the coke oven chamber, and connecting the gas side portion without the coke at the upper portion of the coke oven chamber with the combustion system below the coke oven chamber,
A negative pressure is generated through these channels in the free space of the furnace above the coal cake, and a negative pressure is generated from the free space of the furnace generated during the timed coal charging or coke pushing process. The present invention relates to a method characterized by acting to suck.

  In order to advantageously carry out the present invention, the suction process is started 5 minutes before the opening of the coke oven door and ends 30 minutes after the closing of the coke oven door. Optimal suction of the flue gas from the coke oven chamber is thus ensured. In an exemplary embodiment of the invention, the suction process is continued for up to 4 hours after the door is closed. The flue gas may contain soot.

  In a simple structure type, a flow path is provided on the side wall so that a negative pressure is created in the primary heating space by connecting the flow path to the suction side of the suction device, and the coke oven chamber is arranged on the end side in the suction direction. However, it is conceivable to form a negative pressure directly. However, in an advantageous embodiment, with the coke oven chamber arranged on the end side in the suction direction, the negative pressure is reduced in the secondary heating space placed under the coke oven chamber, and this negative pressure is reduced to the side wall. The flow path is sucked into the primary heating space via a so-called “descent” flow path.

  Typical negative pressure required for complete suction of flue gas is in the range of -20 Pa to -50 Pa in the primary heating space near the coke oven chamber door. In order to obtain this negative pressure, the exhaust of waste gas from the secondary heating space and the supply of air into the primary heating space can be temporarily interrupted. In some embodiments of the present invention, negative pressures up to -120 Pa may be obtained. This aspirated flue gas of the present invention can further be used for any purpose.

  For example, in another embodiment, the coke oven chamber is disposed on the end side in the suction direction, connected to be opened to the secondary heating space via a valve when the coke oven chamber door is opened, and above the coke cake. It is advantageous to use a vacuum receiving tank that generates a negative pressure for a short time in the free space of the furnace. In this way, the negative pressure in the free space of the furnace above the coke cake is sucked from the secondary heating space via the flow path.

  In this case, the vacuum receiving tank is in an elevated negative pressure state and will soon be connected to the secondary heating space when the coke oven chamber door is opened. Thereby, the negative pressure in the primary heating space is sufficient to reliably prevent gas leakage from the coke oven chamber. The negative pressure in the combustion system under the coke oven chamber is thus generated by a vacuum receiving tank that is connected to the secondary heating space via a lockable secondary channel, which is connected to the coke cake. For the suction process, a short distance is connected to the secondary heating space so that the negative pressure in the free space of the furnace above is sucked through the flow path. After the suction process, the vacuum receiver can be separated from the secondary heating space by a suitable device and re-vacuated.

  In a further embodiment of the invention, the negative pressure in the combustion system is generated by a negative pressure containment vacuum line located outside the coke oven chamber, the negative pressure being passed through the flow path in the furnace above the coke cake. Sucked from a branch line in free space. This vacuum line can be placed at any location near the coke oven chamber or coke oven bank. For example, it can be placed under the door of the coke oven chamber. However, it can also be placed on the ceiling of the coke oven room.

  The present invention also implements the generation of negative pressure in the combustion system under the coke oven chamber by a blower that draws negative pressure through another flow path in the combustion system under the coke oven chamber that sucks in negative pressure. Is possible. At that time, the negative pressure can be controlled by a device for controlling the operation of the blower. A receiving tank is not necessarily required for this purpose.

The claim is also an apparatus for generating a negative pressure in a coke oven chamber during a coke pushing and coal charging process, the apparatus comprising:
-The coke oven chamber can be charged with coke cake for carbonization, and above the coke cake is provided with a free space for the furnace in which coal for carbonization after heating is heated,
-The side wall accommodates a flow path suitable for sucking negative pressure,
A combustion system for burning the non-burning volatile coal components as well as the gas produced during partial oxidation is located under the coke oven chamber;
In the apparatus in which the side wall of the coke oven chamber includes flow paths, and these flow paths connect the gas side portion of the coke oven chamber without coke to the combustion system under the coke oven chamber,
The combustion system under the coke oven chamber is equipped with an outwardly extending secondary flow path that can charge negative pressure into the combustion system,
-Negative pressure can be introduced into the free space of the furnace above the coke cake via the combustion system and flow path,
-At least one of the secondary flow paths extended outward is equipped with the adjustment apparatus, It is related with the apparatus characterized by the above-mentioned.

  Depending on the size of the vacuum receiving tank or suction device for the required vacuum, a locking mechanism for connecting the vacuum receiving tank and the secondary heating space is configured correspondingly. If the vacuum reservoir is small and ready to absorb the increased negative pressure, the locking mechanism must be opened quickly and completely. In this case, for example, a slide gate is appropriate. The locking mechanism immediately and completely opens the secondary flow path between the vacuum receiving tank and the secondary heating space, and is sufficient in the primary heating space through the secondary heating space and the flow path positioned between them. Generate negative pressure. However, if the volume of the vacuum receiving tank is large relative to the required negative pressure, the spindle will be sufficient, for example for subtle loading.

  In one embodiment of the inventive device for controlling the negative pressure in the coke oven chamber during the coke pushing and coal charging process, the claim has a regulator for vacuum and sucks the secondary heating space The present invention relates to a flow path that is connected to the suction side of the device and in which the adjusting device is a slide gate.

In another embodiment for controlling the negative pressure in the coke oven chamber during the coke pushing and coal charging processes, the claims relate to a flow path that utilizes a spindle instead of a slide gate as a regulator. Finally, in another embodiment for controlling the negative pressure in the coke oven chamber during the coke pushing and coal charging processes, the claims relate to a flow path that utilizes a flap as a regulator. However, in principle, any adjustment device that adjusts the vacuum in the primary heating space at the desired level and through the secondary flow path through the flow path provided on the side wall within the desired demand period seems appropriate. It is.

  The advantage of the method and apparatus of the present invention utilized for this purpose is that when the coke oven chamber door is opened, a negative pressure is immediately generated in the free space of the furnace above the coke cake and after the door is opened. The flue gas generated at the time of coke pushing is sucked into the inside of the primary heating space instead of being released into the atmosphere, and the present method and apparatus thus obtained are also applied to the coke oven chamber ceiling. There is no space in front of the room door. Undesirable emissions and flue gas emissions to the atmosphere that pose a danger to the environment and plant personnel are thus avoided.

  Hereinafter, the apparatus of the present invention will be described with reference to two drawings. These drawings merely show examples of embodiments for the design and structure of the apparatus of the present invention, and the apparatus of the present invention is not limited to these embodiments.

FIG. 1 is a side view of a coke oven chamber provided with a primary heating space and a secondary heating space. FIG. 2 is another side view of a coke oven chamber provided with a primary heating space and a secondary heating space.

  FIG. 1 shows a side view of a coke oven chamber (1) having a primary heating space (2) and a secondary heating space (3). Gas generated during coal dry distillation flows into the primary heating space (2), where the gas is partially burned, and the partially burned coke gas is the side wall or coke cake (5) of the coke oven chamber (1). It flows in the secondary heating space (3) arranged under the coke cake (5) through the inner flow path (4). There, the gas is completely burned and heats the coke cake (5) from below. The completely burned coke gas is provided with a shut-off device (6a) and passed through a waste gas discharge section (6) that ends in a waste gas flow path (6b). The opening (4a) of the “down” channel of the primary heating space (2) is also shown in FIG. 1, through which negative pressure is sucked (4b). Here, when the door (7) of the coke oven chamber is opened for coke pushing and coal charging, in this case, the primary air provided on the ceiling with the U-tube cover (8). The primary air supply through the opening is blocked by a suitable primary air shut-off device (8a). The discharge from the secondary heating space (3) to the waste gas discharge section (6) is also shut off via a suitable waste gas shut-off device (6a). The locking device (9) at the opening for supplying secondary air into the secondary heating space (9) is interrupted for this step. For example, the valve (10a), which may be a slide gate for the vacuum receiving tank (11), is opened, thereby allowing the primary through the secondary flow path (10), the secondary heating space (3) and the flow path (4). A negative pressure is generated in the heating space (2). According to the invention, the flue gas is thereby sucked into the primary heating space (2) when the coke oven chamber door (7) is open. After this suction step, the vacuum in the vacuum receiving tank (11) can be restored by the vacuum pump (12) through the vacuum line (13) equipped with the shut-off device (13a).

  FIG. 2 shows a side view of a coke oven chamber (1) having a primary heating space (2) and a secondary heating space (3). In this coke oven chamber, vacuum generation and pressure adjustment are performed. A vacuum line (14) is further arranged on the ceiling of the coke oven chamber (1), an example of which is described in GB-A-365934A. In particular, this vacuum line functions for the purpose of adjusting the pressure in the coke oven chamber (1) during operation. For that purpose, a vacuum line (14) connected to all coke oven chambers is arranged on the ceiling of the coke oven chamber (1). The vacuum line (14) is equipped with a holding device (14a) for fixing to the coke oven chamber (1). During operation, the pressure in the primary heating space (2) of the coke oven chamber (1) is controlled via a connection line (14b) including a valve (14c) and a pressure regulator (14d). In this embodiment, the connecting line valve (14c) is connected to the “descent” pipe (4) in the suction stage so that the pressure regulator (14d) is not connected to the coke oven chamber (1) during the vacuum suction stage. Will be cut off. In this embodiment, the door (7) of the coke oven (1) is opened so that the coke cake (5) can be pushed out. As shown in FIG. 2, the wall (7a) is above the door (7) of the coke oven chamber. According to the invention, during this period when the coke oven chamber door (7) is open, the negative pressure is reduced to the “fall” channel (in order to draw the flue gas back into the coke oven chamber (1)). 4) is sucked in through. Instead of providing a U-tube opening (8a) on the ceiling, a simple opening (8c) equipped with an openable flap (8d) is installed. One of these doors (7b) is opened for charging and the other door (7) closes the coke oven chamber (1). As shown in FIG. 2, the charging of the coke cake (5) is performed by a vehicle (16) equipped with a pushing device (15a). The vehicle (15) is placed on a roller (15b) disposed on a flat ground surface (16). In this embodiment, the waste gas channel (6b) is disposed below the ground, and the supply channel of the secondary channel (10) is placed upstream of the shutoff valve (6a) of the waste gas channel. Yes. In this case, an open valve (10b) is provided. Thereby, a secondary channel (10) is connected to a vacuum receiving tank (11), and sucks a negative pressure from a vacuum receiving tank. The coke oven chamber (1) is placed at the end of the suction device and is connected via a secondary heating space (3) and a “down” channel (4).

DESCRIPTION OF SYMBOLS 1 Coke oven room 2 Primary heating space 3 Secondary heating space 4 Flow path 4a “Descent” flow path opening 4b Suction negative pressure 5 Coke cake 6 Waste gas discharge unit 6a Waste gas shutoff device 6b Waste gas flow path 7 Coke Furnace chamber door 7a Coke oven chamber wall 7b above the coke oven chamber door 1st door 8a of the door opened for charging The primary air opening provided in the ceiling with a U-tube cover 8b Primary air shut-off device 8c Primary air opening 8d provided on the ceiling Flap 9 for locking the ceiling primary air opening 9 Locking device 9a at the secondary air supply channel opening Secondary air supply channel Locking device 10 at the opening of the secondary channel 10a Secondary channel shut-off device 10b In this case, the secondary channel valve 11 that is open 11 Vacuum receiving tank 12 Vacuum pump 13 Vacuum line 1 3a Vacuum line shut-off device 14 Vacuum line 14a Vacuum line holding device 14b Vacuum line connection line 14c Connection line valve 14d Pressure adjustment device 15 Vehicle 15a Pushing device 15b Roller 16 Flat ground surface

Claims (10)

A method for generating a negative pressure in a coke oven (1) during a coke pushing and coal charging process,
The coke oven chamber (1) is filled with a layer of coal (5) for coal dry distillation, thereby producing flue gas,
-After coal charging, the coal (5) is heated for coal dry distillation,
These volatile coal components are partly supplied by semi-stoichiometrically supplied air just above the coal charge (5) in the free space (2) of the furnace intended to serve this purpose A combustion system (3) for burning the oxidized and non-burning volatile coal components as well as the gas produced during partial oxidation is located under the coke oven chamber (1),
The side wall of the coke oven chamber (1) or the coke cake (5) or the side wall and the coke cake (5) include a flow path (4), and the flow path (4) includes the coke oven chamber ( In the method of connecting the gas side portion without coke at the top of 1) with the combustion system (3) under the coke oven chamber (1),
A negative pressure is generated through these channels (4) in the free space (2) of the furnace above the coal cake (5), and the negative pressure is generated during a timed coal charging or coke pushing process. A process characterized in that it serves to suck the flue gas that is generated from the free space (2) of the furnace. A method for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to claim 1,
Method according to claim 1, characterized in that the step for generating the negative pressure starts 5 minutes before opening the door (7) and ends 30 minutes after closing the door (7). A method for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to claim 1 or 2.
The negative pressure is generated in the combustion system (3) under the coke oven chamber (1), the coke oven chamber (1) is placed on the end side in the suction direction, and the coke cake (5) Method wherein the negative pressure in the free space (2) of the furnace above is sucked through the flow path (4). A method for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to any one of claims 1 to 3.
The negative pressure in the combustion system (3) is generated by a negative pressure containing vacuum line (14) disposed outside the coke oven chamber (1), and the negative pressure is passed through the flow path (4). And sucking from the branch line of the free space (2) of the furnace above the coke cake (5). A method for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to any one of claims 1 to 3.
The negative pressure is generated by a blower (12) in the combustion system (3) under the coke oven chamber (1), the coke oven chamber (1) being placed on the end side in the suction direction, A blower sucks in the negative pressure through another flow path (10) in the combustion system (3) under the coke oven chamber (1), and the negative pressure is controlled by the regulator (10a). A method characterized by. A method for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to any one of claims 1 to 3.
Lockable secondary flow path (10) in which the negative pressure in the combustion system (3) under the coke oven chamber (1) is connected at a short distance to the secondary heating space (3) for the suction process The negative pressure in the free space (3) of the furnace above the coke cake (5) is generated by a vacuum receiving tank (11) connected to the secondary heating space (3) via 4), wherein the coke oven chamber (1) is arranged on the end side in the suction direction. An apparatus for generating a negative pressure in a coke oven chamber (1) during a coke pushing and coal charging process,
The coke oven (1) can be charged with a coke cake (5) for dry distillation, and the coal (5) for dry distillation is heated above the coke cake (5) after charging. Furnace free space (2) is provided,
The side wall of the coke oven chamber (1) or the coke cake (5) or the side wall and the coke cake (5) contain a flow path (4) suitable for sucking negative pressure;
A combustion system (3) for combusting non-burning volatile coal components as well as gases produced during partial oxidation is located under the coke oven chamber (1);
The side wall of the coke oven chamber (1) or the coke cake (5) or the side wall and the coke cake (5) include a flow path (4), and the flow path (4) includes the coke oven chamber ( In the apparatus for connecting the gas side portion without the coke at the upper part of 1) with the combustion system (3) under the coke oven chamber,
The combustion system (3) under the coke oven chamber (1) is equipped with an outwardly extending secondary flow path (10) capable of charging negative pressure into the combustion system;
A negative pressure can be introduced into the free space (2) of the furnace above the coke cake (5) via the combustion system and the flow path (4);
A device characterized in that at least one of the outwardly extending secondary flow paths (10) is equipped with an adjusting device (10a). An apparatus for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to claim 7,
A device characterized in that the adjusting device (10a) is a slide gate. An apparatus for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to claim 7,
A device characterized in that the adjusting device (10a) is a spindle. An apparatus for controlling the negative pressure in a coke oven chamber (1) during the coke pushing and coal charging process according to claim 7,
A device characterized in that the adjusting device (10a) is a flap.

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