AU2011300896A1

AU2011300896A1 - Device and method for regulating the chamber pressure of coking chambers of a coke-oven battery using adjustable diaphragms at the ascending pipe elbow openings into the raw gas receivers

Info

Publication number: AU2011300896A1
Application number: AU2011300896A
Authority: AU
Inventors: Friedrich Huhn; Frank Krebber
Original assignee: ThyssenKrupp Uhde GmbH
Current assignee: ThyssenKrupp Industrial Solutions AG
Priority date: 2010-08-23
Filing date: 2011-08-16
Publication date: 2013-02-14
Anticipated expiration: 2031-08-16
Also published as: CL2013000487A1; ZA201302110B; EP2609174A1; UA109146C2; RU2013110035A; AU2011300896B2; CA2807439A1; JP5826846B2; BR112013003820A2; WO2012031667A1; DE102010035154A1; CN103097492B; RU2565188C2; EP2609174B1; MX2013002093A; KR20130106823A; CN103097492A; JP2013536288A; AR082526A1; US20140054157A1

Abstract

The invention relates to a device for regulating the chamber pressure of coking chambers of a coke-oven battery using adjustable iris diaphragms or iris nozzles at the ascending pipe elbow openings in the raw gas receiver. The gas stream flowing from the gas chamber of a coking chamber into the raw gas receiver can thus be regulated in permeability so that the pressure in the gas chamber of the coking chamber can be regulated. The invention also relates to a method for regulating the gas stream which flows out the gas chamber of a coking chamber, wherein the pressure in the coking chamber is regulated by said control, and wherein also the liquid stream is regulated which serves to wash out the coking gases from the raw gas stream of the coking chamber.

Description

1 Contrivance and method for regulating the chamber pressure of coke oven chambers in a coke oven battery by means of adjustable diaphragms at the standpipe goose neck outlet openings to the crude gas collecting main [0001] The invention relates to a contrivance for regulating the chamber pressure of 5 coke oven chambers in a coke oven battery by means of adjustable iris diaphragms or iris nozzles at the standpipe gooseneck outlet openings to the crude gas collecting main. The contrivance allows the flow rate of the gas stream flowing from the gas space of a coke oven chamber into the crude gas collecting main to be regulated, thus allowing the pressure in the gas space of the coke oven chamber to be adjusted. The invention also pertains to a method 10 for regulating the gas flow from the gas space of a coke oven chamber, whereby the pres sure in the coke oven chamber is regulated as a result thereof. [0002] During the production of coke, coke oven gases are formed during the coking process. These lead to a pressure increase in the gas space of the coke oven chamber. The pressure in the gas space is very much dependent, among other things, on the progress of 15 the coking process so, depending on the type of coke oven, considerable pressure may build up in the gas space. For this reason, if a chamber pressure control system is used in conven tional-type coke ovens, the coking gas is conveyed to a negative pressure-operated crude gas collecting main which extracts the coking gas for subsequent use. There is usually a cer tain water level in the crude gas collecting main as the crude gases from the coke oven 20 chamber are impacted with water for gas scrubbing purposes. Particles or entrained impuri ties can also be trapped and removed in this way. [0003] The gas flows from the coke oven chamber into the crude gas collecting main via a standpipe which, in a typical embodiment, branches into an gooseneck and then passes into the crude gas collecting main via a vertical connector. For scrubbing purposes, water is 25 fed or injected into the gooseneck and the connector to the collecting main. In order to regu late the pressure, it is therefore necessary to ensure that the water is continuously dis charged or can at least be discharged at regular intervals. [0004] EP 649455 B1 describes a method for regulating or controlling the gas pressure of a coke oven battery, in which a cup-shaped restrictor element that can be filled with water 30 is operated in accordance with the pressure variation during the formation of gas from the coal to be coked, each individual oven being restricted by adjusting the water level in the re strictor element as a function of the actual pressure conditions in the respective coke oven chamber in such a manner that, depending on the desired gas pressure in the coke oven 2 chamber, the water level is adjusted as a function of the outflow or inflow of the water from or into the cup-shaped restrictor element or as a function of a predeterminable overflow level. The gas pressure is regulated via a swivel cup with one or more water outlets between the cup base and the cup rim, said cup being located below a rising pipe bend and designed so 5 that it can be filled with varying amounts of water via a coal water line comprising a valve which is connected via operating devices and a computer to pressure measuring points. The method has the disadvantage that the oven pressure is regulated via a variable water level in an immersion cup and regulation of the water level thus depends on the volumetric flow rate of the collecting main scrubbing liquid which is supplied to the immersion cup via the relevant 10 water feed nozzles and which at times may therefore be low, meaning that the water level falls below the minimum required for gas cooling and the crude gas is not cooled sufficiently. [0005] EP 1390440 B1 describes a contrivance for regulating the gas pressure in a coke oven chamber comprising an immersion cup to which water is supplied and an immersion pipe which is connected to the gas space of the coke oven chamber and which terminates in 15 the immersion cup, wherein the immersion cup has an overflow and a closable outflow and wherein the immersion pipe is designed with an end section, the free gas outlet cross section of which depends on the liquid level in the immersion cup, whereby the liquid level can be regulated by a run-off pipe for water, the inlet end of which protrudes into the immersion pipe, said run-off pipe having jacket-sided inlet openings for the water feed and there being a slide 20 that is open on both sides located in the run-off pipe, said slide closing off the inlet openings of the run-off pipe in longitudinal direction according to its position and forming a vertically adjustable overflow for the water flowing into the run-off pipe, and the inlet end of the run-off pipe being enclosed by a siphon pipe which closes off the run-off pipe at the top and forms an annular channel that opens into the immersion cup below the immersion pipe so that wa 25 ter can flow in. Again, this contrivance and the process it operates have the disadvantage of being dependent on the water inflow always allowing a certain water level to be built up in the immersion cup. Unlike in the above-mentioned EP 649455 B1, the water inflow rate is con stant and is not regulated, making it possible, with a certain amount of effort, to control sus ceptibility to contamination by gas condensates as there is no need for a control valve in the 30 inflowing water stream. [0006] Feeding water into the crude gas collecting main serves to maintain a flow of liq uid through which the gas pressure in the coke oven chamber can be regulated. If the coke oven gas pressure is too low, air will penetrate into the coke oven chamber and the combus tion of coal or coke oven gas may lead to overheating and consequently, to the coke oven 35 chamber being damaged. Too high a pressure causes unwanted emissions of coke oven gas 3 into the environment. Moreover, the water added to the standpipe or the standpipe goose neck also serves as scrubbing water, removing particles and condensable constituents, such as tar, from the discharged coke oven gas. It is thus desirable to achieve a continuous water flow into the crude gas collecting main without influencing gas pressure regulation. 5 [0007] Therefore, the objective is to provide a gas-pressure-regulating contrivance which is not dependent on the water inflow and still allows water to flow from the standpipe into the crude gas collecting main via the regulating contrivance. The regulating contrivance should not be affected by the coke oven gases and still allow the coke oven crude gases to mix thoroughly with the water or a liquid. On closure of the regulating contrivance, a residual wa 10 ter flow should still be maintained to ensure that the scrubbing liquid discharges into the crude gas collecting main to prevent it from accumulating and flowing back into the coke oven chamber. On the other hand, it must also be ensured that the gas-regulating contriv ance closes reliably to prevent negative pressure being created in the coke oven chamber, which would suck air into the gas collecting space and from there into the crude gas collect 15 ing main. [0008] The invention achieves this objective by means of an adjustable diaphragm for regulating the gas and liquid flow into the gas collecting main so that it is possible to adjust the flow rate of the mass flow passing through the adjustable diaphragm. The diaphragm may be designed as a horizontally mounted, horizontally opening diaphragm that shuts off 20 the cross section of the standpipe gooseneck in horizontal direction like a photographic dia phragm (also termed "iris diaphragm"). The diaphragm may also be designed as a horizon tally mounted, but vertically opening, diaphragm, the petals of which, for example, fold down when the diaphragm opens (also termed "iris nozzle"). [0009] Inside the standpipe gooseneck there may be a siphon, which, for example, may 25 be suspended at the side of the standpipe gooseneck or in the middle of the standpipe gooseneck. In this way, the scrubbing liquid that is injected into the gooseneck can be dis charged at all times. However, it is also possible to omit the siphon, in which case the adjust able diaphragm is designed to leave a slight opening in the cross section. This slight opening allows the liquid injected into the gooseneck to be drained into the crude gas collecting main 30 even if there is no siphon. [0010] What is claimed in particular is a contrivance for regulating the chamber pres sure of coke oven chambers in a coke oven battery by means of adjustable diaphragms at the standpipe gooseneck outlet openings to the crude gas collecting main, comprising 4 * a coke oven battery consisting of a number of coke oven chambers, wherein * each individual coke oven chamber can be hermetically sealed and is equipped with a standpipe that is connected to a negative pressure-operated crude gas collecting main via a gooseneck, and 5 0 the standpipe at the top end of the gooseneck is provided with an opening and its closure that can be opened and closed, and * the gooseneck is equipped with a liquid feed inlet via which the standpipe can be supplied at and/or downstream of the gooseneck with a liquid running into the crude gas collecting main, 10 said contrivance being characterised in that * downstream of the gooseneck the standpipe opens into the crude gas collect ing main via an outlet section and between the gooseneck and the outlet sec tion there is a diaphragm with an adjustable cross section which is used to close off the gas and liquid flow and which is equipped with a device for ad 15 justing the cross section of the opening, with * either the standpipe gooseneck and the crude gas collecting main being con nected via a siphon through which the liquid can drain even when the dia phragm is closed, or * the diaphragm having a cross-sectional slit that leaves part of the diaphragm 20 cross section open even on complete closure. [0011] In a typical embodiment of the invention the opening with the closure at the gooseneck is a cover plate that for closure is fitted to the opening at the top end above the gooseneck branch, said cover plate being equipped with a grasp for operation and a hinge at the gooseneck. During normal operation this serves to equalise the coke oven chamber 25 pressure with respect to the outside pressure towards the end of the coking time prior to opening the coke oven chamber doors, and also to clean tar deposits from the standpipe. A cover plate fitted to the top end of the gooseneck is the most advantageous embodiment al though in an exemplary embodiment a slide that opens sideways is also conceivable. [0012] In an exemplary embodiment the diaphragm consists of plates that can be 30 closed in a concentric, tangential and circular manner towards the centre of the standpipe. This corresponds to an embodiment which is comparable to a photographic diaphragm. For opening or closing, these plates are then moved in horizontal direction towards the centre of the pipe. There can be any number of plates and these can be of any size. Also the dia- 5 phragms can be of any number in the standpipe. The important thing is that the plate mate rial is resistant to the prevailing temperatures and gas or liquid components. One embodi ment regarding diaphragms that close in a tangential and circular manner towards the centre of a pipe ("iris diaphragms") is known from US 4094492 A. However, this specification does 5 not describe oven pressure regulation at the goosenecks branching off coke oven chamber standpipes and the special requirements that result, such as high temperatures, water flow through the diaphragm and sealing of the coke oven chamber to prevent negative pressure entering. [0013] The diaphragms in the gooseneck pipe are typically connected to an actuator, 10 by means of which they can be moved from the outside. In one embodiment of the method, the plates are fitted with pins, all of which are mounted in a specially provided slotted open ing or flexible connection to a ring positioned above so that the plates and with them the dia phragm opens or closes when the ring moves. The ring, which is in the pipe, is then tight ened or released from the outside, causing the pins to move the plates, thus opening or clos 15 ing the pipe. This allows the diameter of the diaphragm opening to be regulated. [0014] A further embodiment envisages a diaphragm consisting of plates that can be closed in a concentric, secantial and direct manner towards the centre of the standpipe. These may, for example, be plates that are moved from the outer edge of the diaphragm to the centre of the standpipe gooseneck until said plates close to form a ring-shaped disc with 20 a central aperture or a disc that is completely shut. For opening or closing, these are then moved in horizontal direction. Again, there may be any number of plates and these can be any size and made of any material. [0015] Again, these diaphragms in the gooseneck pipe are typically connected to a regulating device which allows them to be moved from the outside. In one embodiment, the 25 plates are fitted with pins. The pins can be pulled out of the gooseneck or the middle of the gooseneck pipe by means of levers extending through the gooseneck wall to the outside so that the plates and with them the diaphragms open or close when the lever is moved. This al lows the diameter of the diaphragm opening to be regulated. [0016] A further embodiment envisages the diaphragms consisting of plates that are 30 opened by being swung up or down in vertical direction. In this case, the plates are designed as petals that are preferably pulled down in the direction of flow by an actuator. This is con sistent with an embodiment that is comparable to a funnel diaphragm. The further the petals are pulled down, the wider the diaphragm opens. Again, there may be any number of dia phragms and these can be any size and made of any material. An embodiment for dia- 6 phragms that are opened by being swung up or down in the pipe in vertical direction ("iris nozzles") are known from DE 10002529 Al. However, this specification again does not de scribe pressure regulation at the goosenecks branching off coke oven chamber standpipes and the special requirements that result, such as high temperatures, water flow through the 5 diaphragm and sealing of the coke oven chamber to prevent negative pressure entering. [0017] A further embodiment envisages the diaphragms being equipped with a circumferential ring that can be tightened or released by a regulating device via a transmis sion lever, thus pulling the plates up or letting them down and opening or closing the dia phragm with the gooseneck. This also allows the diameter of the diaphragm opening to be 10 regulated. In a simple embodiment, this ring is designed as a wire which is threaded through retainer hooks in the diaphragms so as to encircle said diaphragms. The mechanical drive of the regulating device can be of any design and the way in which the actuating pulse is transmitted can be left to the technician. [0018] In an exemplary embodiment the diaphragm can be adjusted by means of an 15 electric regulating device. A further embodiment envisages the diaphragm being adjusted by means of a pneumatic regulating device. In a simple embodiment a manual actuator or regu lating device is also conceivable. [0019] The diaphragms and the actuator may be located in a gooseneck pipe section that can be removed from the gooseneck. For this, the removable pipe section can, for ex 20 ample, be flanged to the gooseneck. [0020] In a preferred embodiment the contrivance is equipped with a siphon. How ever, it is also possible to equip the outlet section with a siphon that runs through the middle of the standpipe gooseneck and is enclosed by the diaphragm when closed. This allows the water flow to continue even when the diaphragm is closed. The standpipe gooseneck can 25 also be equipped with a siphon at the side that laterally passes the standpipe gooseneck outside of the standpipe. This allows liquid to pass through even when the diaphragm is completely closed. [0021] The siphon may be designed in any way. It may, for example, be designed as a simple S-shaped pipe but also as a double-walled pipe with an inside opening. It may also 30 be equipped with separate conveying devices. The siphon may be made of any material and be of any type.

7 [0022] In one embodiment of the method the gooseneck pipe with the diaphragms has a diameter of 0.25 m to 0.85 m measured at the point where the diaphragms are located but excluding said diaphragms. However, it is possible to implement the method with any size diameter. In one embodiment of the invention the standpipe that is connected to the 5 gooseneck has a cover plate above the branch, said cover plate being able to be opened and closed. During normal operation this serves to equalise the coke oven chamber pressure with respect to the outside pressure towards the end of the coking time prior to opening the coke oven chamber doors and to clean tar deposits from the standpipe. [0023] The invention also relates to a method for regulating the gas flow from a coke 10 oven chamber into a crude gas collecting main. What is claimed, in particular, is a method for regulating the chamber pressure of coke oven chambers in a coke oven battery by means of adjustable diaphragms at the standpipe gooseneck outlet openings to the crude gas collect ing main, wherein * coal is coked in cycles in the coke oven chambers of a coke oven battery, the 15 cycles comprising charging, coking and pushing operations, and * the gas pressure in the coke oven chamber is regulated during the coking process via a standpipe with a regulating device at the end of the standpipe that transports the coking gas from the gas space of the coking chamber to a negative pressure-operated crude gas collecting main via a gooseneck, and 20 e the standpipe from the coke oven chamber is fed with a liquid stream flowing out of the coke oven chamber, said method being characterised in that * the gas pressure in the gas space of the coke oven chamber is regulated by a diaphragm as a regulating device that changes the cross section of the stand 25 pipe gooseneck outlet, the cross section of the diaphragm being regulated by means of a regulating device, and * when the diaphragm is completely closed, the liquid from the standpipe gooseneck discharges into the crude gas collecting main either via a siphon or a slit in the diaphragm. 30 [0024] Typically, the coke oven gas flows into the standpipe gooseneck at a tempera ture of 7000C to 1100 C and is cooled immediately after entry by injecting liquid. The remain ing liquid is then discharged into the crude gas collecting main. After cooling, the gas typi- 8 cally still has a temperature of between 750C and 1200C as can be shown by measuring the temperature. [0025] The process can be designed so that the diaphragm is controlled as a function of the internal pressure of the coke oven chamber, thus allowing the opening and closing of 5 the diaphragm to be controlled in accordance with a typical coking cycle. When charging the coke oven chamber, the diaphragm is opened fully so that the charging gases can be sucked into the crude gas collecting main by the negative pressure that prevails in this main. During the coking cycle the pressure in the coke oven chamber is regulated so as to ensure that there is an optimum desired value in the gas space of the coke oven chamber at all times. 10 When pushing the carbonised coke out of the coke oven chamber, the passage of the gas from the coke oven chamber to the crude gas collecting main is interrupted by partial or complete closure of the diaphragms. In this way air is prevented from entering the crude gas collecting main (so-called "uncoupling of the coke oven chamber from the crude gas collect ing main"). During this operation, the liquid can continue to flow into the crude gas collecting 15 main via the siphon if the diaphragm is not provided with a slight opening in it. This permits an optimum pressure setting in the coke oven chamber at all times, regardless of the liquid flow into the standpipe. Preferably, opening and closing of the diaphragm may be controlled by a computer. [0026] The method and the device may be set so that, if the drive fails, the actuator 20 remains in the control position it was last in. Overpressurisation in the coke oven chamber can thus be counteracted as the pressure in the coke oven chamber normally drops during the coking process. In such case any unwanted drop in pressure in the coke oven chamber can be neutralised by increasing the pressure in the collecting main. By this way, it is possi ble to regulate the gas pressure in the gas space of the coke oven chamber by altering the 25 negative pressure in the crude gas collecting main, if the control mechanism drive fails. [0027] In many embodiments the standpipe that is connected to the gooseneck has a cover plate above the branch that during normal operation serves to equalise the coke oven chamber pressure with respect to the outside pressure towards the end of the coking time prior to opening the coke oven chamber doors, and to clean tar deposits from the standpipe. 30 In one embodiment of the invention the cover plate of the standpipe above the branch is temporarily opened while simultaneously closing the diaphragm when the doors of the coke oven chamber are opened. By closing the diaphragm air is prevented from being sucked in through the gooseneck as a result of the negative pressure in the crude gas collecting main and the crude gas collecting main is sealed off from the surroundings. One embodiment en- 9 visages the possibility of pneumatically opening or closing the cover plate located in the standpipe above the branch. [0028] The regulating device for the diaphragms or the cover plate may, for example, be moved by means of an electric drive. However, it may also be moved, for example, by a 5 pneumatic drive. In a simple embodiment it is also conceivable for the cover plate or the dia phragm to be moved manually. One embodiment of the invention envisages the pneumatic drive being powered by a nitrogen-containing gas. Another embodiment envisages the pneumatic drive being powered by air or by an air-containing gas. [0029] The liquid introduced into the gooseneck may be any kind. Preferably, it is wa 10 ter. This serves to transport the particles and scrub the coke oven gases. One embodiment envisages the water containing ammonia. A computer-controlled unit can be used to control the regulating device. This may, for example, be deployed in the gooseneck as a function of pressure. For this purpose, an exemplary embodiment envisages a pressure line in the gooseneck that transmits the pressure in the gooseneck to a pressure sensor. 15 [0030] The advantage of the invention is to provide a regulated gas flow from the coke oven chamber to the crude gas collecting main that does not depend on the inflow of water or liquid and still allows liquid to flow from the standpipe into the crude gas collecting main via the regulating contrivance. The regulation thus still allows the coke oven crude gases to mix thoroughly with the water or a liquid when the diaphragm is closed. On closure 20 of the regulating contrivance, a residual water flow is maintained to ensure that the scrubbing liquid drains into the crude gas collecting main. If a suitable construction manner of the dia phragm is selected, the regulating contrivance can be reliably closed at all times. [0031] The invention is illustrated on the basis of eleven diagrams, these diagrams merely depicting embodiments of the invention. 25 [0032] FIG. 1 shows an arrangement with a coke oven chamber, standpipe, goose neck and crude gas collecting main. FIG. 2 and FIG. 3 show a device with a diaphragm in accordance with the invention, in these cases the diaphragm being of a vertically opening type. FIG. 2 shows said diaphragm in open and FIG. 3 in closed position. FIG. 4 and FIG. 5 show a device with a diaphragm in accordance with the invention, in these cases the dia 30 phragm being of a vertically opening type and having a siphon in the pipe. FIG. 4 shows said diaphragm in open and FIG. 5 in closed position. FIG. 6 and FIG. 7 show a device with a diaphragm in accordance with the invention, in these cases the diaphragm being of a hori zontally opening type. FIG. 6 shows said diaphragm in open and FIG. 7 in closed position.

10 FIG. 8 and FIG. 9 show a device with a diaphragm in accordance with the invention, in this case the diaphragm being of a horizontally opening type and having a siphon in the pipe. FIG. 8 shows said diaphragm in open and FIG. 9 in closed position. The diaphragms in ac cordance with the invention in FIG. 2 to 9 are shown in a side view. FIG. 10 and FIG. 11 5 show vertical views looking down at the diaphragms in accordance with the invention, FIG. 10 in closed position and FIG. 11 in open position. [0033] FIG. 1 shows a coke oven chamber (1) used to produce coke (2). The gas space (3) is connected with a gooseneck (5) via a standpipe (4), said gooseneck opening into a negative pressure-operated crude gas collecting main (6). Depending on the operating 10 conditions this main is filled with a liquid (7). In accordance with the invention, an outlet sec tion (8) is fitted with a diaphragm (9) which permits or prevents the passage of gas. Shown is the regulating device (10) that opens or closes the diaphragm (9). Said device is controlled as a function of the pressure in the gooseneck (5). For this purpose, there is a pressure gauge (11) in the gooseneck (5), said gauge being connected to a computer (12) that con 15 trols the position of the diaphragm (9). In the gooseneck (5) there is also a feed device (13) for liquid (14), preferably water. This flows along the wall of the gooseneck (5a). Shown here is the diaphragm (9) in open position, allowing the water stream (14a) and the crude gas stream (15a) to pass through. Also shown here is the crude gas stream (15) from the coke oven chamber (1). The cover plate (16) of the standpipe (4), which can be moved by means 20 of a grasp mechanism (16a), und which is attached to the standpipe (4) via a hinge (16b), can be temporarily opened for pressure equalisation or cleaning. [0034] FIG. 2 shows an outlet section (8) with a diaphragm made of plates in accor dance with the invention (9a), the diaphragm being of a vertically opening type. The liquid stream (14) injected into the gooseneck flows along (14a) the wall of the outlet section (8). 25 Shown are the crude gas stream (15), the almost completely open vertical diaphragm (9a), the effluent liquid stream (14b) and the crude gas stream which is allowed to pass (15a). The diaphragm (9a) is opened or closed by means of a regulating device (10) that transmits the drive pulse via a lever (10a) and a wire (9c) as an actuator. [0035] FIG. 3 shows the vertically opening diaphragm (9b) made of plates in accor 30 dance with the invention in closed form. Shown here are a residual liquid flow (14b) and a liquid level (17) forming in the diaphragm (9b). Also shown is the actuator that controls the vertical diaphragms (9c), said actuator consisting of a wire. [0036] FIG. 4 shows an outlet section (8) with a diaphragm in accordance with the in vention (9a), the diaphragm being of a vertically opening type and there being a siphon (18) 11 in the middle of said outlet section. This is attached by means of a suspension fixture (18a) and has an opening inside (18b). Shown are the crude gas stream (15), the almost com pletely open vertical diaphragm (9a), the effluent liquid stream (14b) and the crude gas stream which is allowed to pass through (15a). The diaphragm (9a) is opened and closed by 5 means of a regulating device (10). [0037] FIG. 5 shows an outlet section (8) with a vertically opening diaphragm (9b) in accordance with the invention, in this case the diaphragm being in closed form and there be ing a siphon (18) in the middle of said outlet section. This is attached by means of a suspen sion fixture (18a). The siphon has an opening inside (18b), there being a liquid coming up 10 level thereto (17). As a result, crude gas (15) is prevented from passing. Shown are the crude gas stream (15), the almost completely closed vertical diaphragm (9b) and the effluent liquid stream (14b). The diaphragm (9b) is opened and closed by means of a regulating de vice (10). [0038] FIG. 6 shows an outlet section (8) with a diaphragm made of plates in accor 15 dance with the invention (9d), the diaphragm being of a horizontally opening type. Shown are the crude gas stream (15), the almost completely open horizontal diaphragm (9d), the efflu ent liquid stream (14b) and the crude gas stream which is allowed to pass through (15a). The diaphragm (9d) is opened and closed by means of a regulating device (10). The plates which can be moved in horizontal direction (9d) can, for example, be moved across the whole pipe 20 via a ring-shaped actuator (9f) for controlling the horizontal diaphragms (9f). [0039] FIG. 7 shows an outlet section (8) with a diaphragm made of plates in accor dance with the invention (9e), the diaphragm being in horizontally closed form. Shown are the crude gas stream (15), the almost completely closed horizontal diaphragm (9e) and the residual effluent liquid stream (14b). The diaphragm (9e) is opened and closed by means of 25 an actuator (9f). [0040] FIG. 8 shows an outlet section (8) with a diaphragm in accordance with the in vention (9d), the diaphragm being of a horizontally opening type and there being a siphon (18) in the middle of said outlet section. This is attached by means of a suspension fixture (18a). Shown are the crude gas stream (15), the almost completely open horizontal dia 30 phragm (9d), the effluent liquid stream (14b) and the crude gas stream that is allowed to pass through (15a). The diaphragm (9d) is opened and closed by means of an actuator (9f). [0041] FIG. 9 shows an outlet section (8) with a diaphragm in accordance with the in vention (9d), the diaphragm being in horizontally closed form and there being a siphon (18) 12 in the middle of said outlet section. This is attached by means of a suspension fixture (18a). Shown are the crude gas stream (15), the almost completely open horizontal diaphragm (9d) and the residual effluent liquid stream (14b). The siphon has an opening inside (18b), there being a liquid coming up level thereto (17). As a result, crude gas (15) is prevented from 5 passing. The diaphragm (9e) is opened and closed by means of an actuator (9f) with slotted openings for controlling horizontal diaphragms (9e). [0042] FIG. 10 shows a vertical view looking down at the open diaphragms (9a) in accordance with the invention. Shown is the diameter of the outlet section (8) of the stand pipe gooseneck, the plates (9a) in closed form and the regulating device (10) with the trans 10 mission lever (10a). In this case, this is transmitted via a wire as an actuator (9c), said wire encircling the plates (9a) in suitable retainer fixtures. [0043] FIG. 11 shows a vertical view looking down at the closed diaphragm (9b) in the outlet section (8) of the standpipe in accordance with the invention, in this case said dia phragms being in closed form. 15 [0044] List of reference numbers and designations 1 Coke oven chamber 2 Coke, coal 3 Gas space 4 Standpipe 5 Gooseneck 5a Gooseneck pipe, standpipe gooseneck outlet 6 Crude gas collecting main 7 Liquid 8 Outlet section 9 Diaphragm 9a Open vertical diaphragm 9b Closed vertical diaphragm 9c Wire for controlling vertical diaphragms 9d Open horizontal diaphragm 9e Closed horizontal diaphragm 9f Actuator with slotted openings for controlling horizontal diaphragms 10 Regulating device 10a Transmission lever 11 Pressure gauge 13 12 Computer 13 Feed device for liquid 14 Liquid 14a Liquid flow in outlet section 14b Residual liquid stream 15 Crude gas stream 15a Crude gas stream that is allowed to pass through 16 Standpipe cover plate 16a Grasp mechanism for cover plate 16b Hinge for cover plate 17 Liquid level 18 Siphon 18a Suspension fixture for siphon 18b Openings in siphon

Claims

1. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6), comprising 5 0 a coke oven battery consisting of a number of coke oven chambers (1), wherein * each individual coke oven chamber (1) can be hermetically sealed and is equipped with a standpipe (4) that is connected to a negative pressure operated crude gas collecting main (6) via a gooseneck (5), and 10 0 the standpipe (4) at the top end of the gooseneck (5) is provided with an opening and its closure (16) that can be opened and closed, and * the gooseneck (5) is equipped with a liquid feed inlet (13) via which the stand pipe (4) can be supplied at and/or downstream of the gooseneck (5) with a liquid (14) running into the crude gas collecting main (6), 15 said contrivance being characterised in that * downstream of the gooseneck (5) the standpipe (4) opens into the crude gas collecting main (6) via an outlet section (8), and between the gooseneck (5) and the outlet section (8) there is a diaphragm (9) with an adjustable cross section which is used to close off the gas and liquid flow and which is 20 equipped with a device (10) for adjusting the cross section of the opening, with * either the standpipe gooseneck (5) and the crude gas collecting main (6) be ing connected via a siphon (18) through which the liquid can drain (14b) even when the diaphragm (9) is closed, or * the diaphragm (9) having a cross-sectional slit that leaves part of the dia 25 phragm cross section open even on complete closure.

2. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 1, character ised in that the opening with the closure (16) at the gooseneck (5) is a cover plate 30 (16), that for closure is fitted to the opening at the top end above the gooseneck (5) branch and is equipped with a grasp (16a) for operation and a hinge (16b) at the gooseneck (5). 2

3. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to either of claims 1 or 2, characterised in that the diaphragm (9) consists of plates (9d, 9e) that can be 5 closed horizontally in a concentric, tangential and circular manner towards the centre of the standpipe.

4. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 3, character 10 ised in that the plates (9) are fitted with pins (9f), all of which are mounted in a spe cially provided slotted opening of a ring (9f) positioned above so that the diaphragm (9) opens or closes when the ring (9f) moves.

5. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out 15 let openings (5a) to the crude gas collecting main (6) according to either of claims 1 or 2, characterised in that the diaphragm (9) consists of plates (9d, 9e) that can be closed horizontally in a concentric, secantial and direct manner towards the centre of the standpipe.

6. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke 20 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 5, character ised in that the plates (9) are fitted with pins (9f), said pins (9f) being able to be pulled out of the gooseneck (5) by means of levers (10a) extending through the gooseneck wall to the outside so that the diaphragm (9) opens or closes when the 25 lever (1Oa) is moved.

7. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 1, character ised in that the diaphragm (9) consists of plates (9a, 9b) that are opened by being 30 swung up or down in vertical direction.

8. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 7, character- 3 ised in that the plates (9) are equipped with a circumferential wire (9c) that can be tightened or released by a transmission lever (10a), thus pulling the plates (9) up or letting them down (9a,9b) and opening or closing the diaphragm (9) with the goose neck (5). 5

9. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 1 to 8, characterised in that the diaphragm (9) can be adjusted by means of an electric regulating device (10).

10 10. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 1 to 8, characterised in that the diaphragm (9) can be adjusted by means of a pneumatic regulating device (10). 15

11. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 1 to 10, characterised in that the diaphragms (9) and the regulating device (10) are lo cated in a gooseneck (5) pipe section that can be removed from the gooseneck (5). 20

12. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 11, charac terised in that the removable pipe section is to be flanged to the gooseneck (5).

13. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke 25 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 1 to 12, characterised in that the standpipe gooseneck (5) is equipped with a siphon (10) that runs through the middle of the standpipe gooseneck (5) and is enclosed by the diaphragm (9) when closed. 30

14. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings to the crude gas collecting main (6) according to one of claims 1 to 12, 4 characterised in that the standpipe gooseneck (5) is equipped with a siphon (18) that laterally passes the standpipe gooseneck (5) outside of the standpipe (4).

15. Contrivance for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out 5 let openings to the crude gas collecting main (6) according to one of claims 1 to 14, characterised in that the gooseneck pipe (5) with the diaphragm (9) has a diameter of 0.25 m to 0.85 m measured at the point where the diaphragms are located but ex cluding said diaphragms.

16. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 10 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 1 to 15, wherein * coal (2) is coked in cycles in the coke oven chambers (1) of a coke oven bat tery, the cycles comprising charging, coking and pushing operations, and 15 0 the gas pressure in the coke oven chamber (1) is regulated during the coking process via a control device (9) at the end of the standpipe gooseneck (5) that transports the coking gas (15) from the gas space (3) of the coking chamber (1) to a negative pressure-operated crude gas collecting main (6), and * the gooseneck (5) of the standpipe (4) out of the coke oven chamber is fed 20 with a liquid stream (14a), said method being characterised in that * the gas pressure in the gas space (3) of the coke oven chamber (1) is regu lated by a diaphragm (9) that changes the cross section of the standpipe gooseneck outlet (8), the cross section of the diaphragm (9) being regulated 25 by means of a regulating device (10), and * when the diaphragm (9) is completely closed, the liquid from the standpipe gooseneck (5) discharges into the crude gas collecting main (6) either via a siphon (18) or a slit in the diaphragm (9).

17. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 30 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 16, charac- 5 terised in that the coke oven gas (15) flows into the standpipe gooseneck (5) at a temperature of 7000C to 1100'C and is cooled immediately by injecting liquid (14), with the remaining liquid (14) being discharged into the crude gas collecting main (6).

18. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 5 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 16 or 17, characterised in that the diaphragm (9) is controlled as a function of the internal pressure of the coke oven chamber (1).

19. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 10 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to claim 18, charac terised in that opening and closing of the diaphragm (9) is controlled by a computer.

20. Method for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out 15 let openings (5a) to the crude gas collecting main (6) according to one of claims 16 to 19, characterised in that the cover plate (16) of the standpipe (4) above the branch of the gooseneck (5) is temporarily opened while simultaneously closing the dia phragm (9) when the doors of the coke oven chamber are opened.

21. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 20 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 16 to 20, characterised in that the cover plate (16) located in the standpipe (4) above the standpipe gooseneck branch (5a) can be opened or closed pneumatically.

22. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 25 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 16 to 21, characterised in that the regulating device (10) for the diaphragms (9) or for the cover plate (16) is powered by a nitrogen-containing gas.

23. Method for regulating the chamber pressure of coke oven chambers (1) in a coke 30 oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out let openings (5a) to the crude gas collecting main (6) according to one of claims 16 to 6 21, characterised in that the regulating device (10) for the diaphragms (9) or for the cover plate (16) is powered by an air-containing gas.

24. Method for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out 5 let openings (5a) to the gas collecting main (6) according to one of claims 16 to 23, characterised in that the regulating device (10) remains in the control position it was last in if the drive fails.

25. Method for regulating the chamber pressure of coke oven chambers (1) in a coke oven battery by means of adjustable diaphragms (9) at the standpipe gooseneck out 10 let openings (5a) to the crude gas collecting main (6) according to one of claims 16 to 24, characterised in that if the control mechanism (10) drive fails, the gas pressure in the gas space (3) of the coke oven chamber (1) is regulated by altering the nega tive pressure in the crude gas collecting main (6).