Note: Descriptions are shown in the official language in which they were submitted.
CA 02807439 2013-02-04
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1
Contrivance and method for regulating the chamber pressure of coke oven cham-
bers in a coke oven battery by means of adjustable diaphragms at the standpipe
gooseneck outlet openings to the crude gas collecting main
[0001] The invention relates to a contrivance for regulating the chamber
pressure of
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 pres-
sure in the gas space of the coke oven chamber to be adjusted. The invention
also per-
tains to a method for regulating the gas flow from the gas space of a coke
oven chamber,
whereby the pressure 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 pro-
gress of the coking process so, depending on the type of coke oven,
considerable pres-
sure may build up in the gas space. For this reason, if a chamber pressure
control system
is used in conventional-type coke ovens, the coking gas is conveyed to a
negative pres-
sure-operated crude gas collecting main which extracts the coking gas for
subsequent
use. There is usually a certain water level in the crude gas collecting main
as the crude
gases from the coke oven chamber are impacted with water for gas scrubbing
purposes.
Particles or entrained impurities 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 pur-
poses, water is fed or injected into the gooseneck and the connector to the
collecting
main. In order to regulate the pressure, it is therefore necessary to ensure
that the water
is continuously discharged or can at least be discharged at regular intervals.
[0004] EP 649455 B1 describes a method for regulating or controlling the gas
pres-
sure of a coke oven battery, in which a cup-shaped restrictor element that can
be filled
with water 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 wa-
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ter level in the restrictor element as a function of the actual pressure
conditions in the re-
spective coke oven chamber in such a manner that, depending on the desired gas
pres-
sure in the coke oven 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 be-
low a rising pipe bend and designed so 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 liq-
uid which is supplied to the immersion cup via the relevant water feed nozzles
and which
at times may therefore be low, meaning that the water level falls below the
minimum re-
quired 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 im-
mersion pipe which is connected to the gas space of the coke oven chamber and
which
terminates in the immersion cup, wherein the immersion cup has an overflow and
a clos-
able 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 open-
ings for the water feed and there being a slide 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 di-
rection 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 si-
phon 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 water 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
constant and
is not regulated, making it possible, with a certain amount of effort, to
control susceptibility
to contamination by gas condensates as there is no need for a control valve in
the inflow-
ing water stream.
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[0006] Feeding water into the crude gas collecting main serves to maintain a
flow of
liquid 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
combustion of coal or coke oven gas may lead to overheating and consequently,
to the
coke oven chamber being damaged. Too high a pressure causes unwanted emissions
of
coke oven gas into the environment. Moreover, the water added to the standpipe
or the
standpipe gooseneck also serves as scrubbing water, removing particles and
condens-
able 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.
[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 stand-
pipe into the crude gas collecting main via the regulating contrivance. The
regulating con-
trivance 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 con-
trivance, a residual water flow should still be maintained to ensure that the
scrubbing liq-
uid 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 contrivance 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 collecting 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 dia-
phragm may be designed as a horizontally mounted, horizontally opening
diaphragm that
shuts off the cross section of the standpipe gooseneck in horizontal direction
like a pho-
tographic diaphragm (also termed "iris diaphragm"). The diaphragm may also be
de-
signed as a horizontally 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 be suspended at the side of the standpipe gooseneck or in the middle of
the stand-
pipe gooseneck. In this way, the scrubbing liquid that is injected into the
gooseneck can
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be discharged at all times. However, it is also possible to omit the siphon,
in which case
the adjustable 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 even if there is no siphon.
[0010] What is claimed in particular is a contrivance for regulating the
chamber
pressure of coke oven chambers in a coke oven battery by means of adjustable
dia-
phragms at the standpipe gooseneck outlet openings to the crude gas collecting
main,
comprising
= 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
= 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 run-
ning into the crude gas collecting main,
said contrivance being characterised in that
= downstream of the gooseneck the standpipe opens into the crude gas col-
lecting main via an outlet section and between the gooseneck and the out-
let section 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 de-
vice for adjusting the cross section of the opening, with
= either the standpipe gooseneck and the crude gas collecting main being
connected via a siphon through which the liquid can drain even when the
diaphragm is closed, or
= the diaphragm having a cross-sectional slit that leaves part of the dia-
phragm cross section open even on complete closure.
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[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 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 although 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
closed in a concentric, tangential and circular manner towards the centre of
the stand-
pipe. This corresponds to an embodiment which is comparable to a photographic
dia-
phragm. For opening or closing, these plates are then moved in horizontal
direction to-
wards the centre of the pipe. There can be any number of plates and these can
be of any
size. Also the diaphragms can be of any number in the standpipe. The important
thing is
that the plate material is resistant to the prevailing temperatures and gas or
liquid compo-
nents. One embodiment 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 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
actua-
tor, 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 opening or flexible connection to a ring positioned above so that the
plates and
with them the diaphragm opens or closes when the ring moves. The ring, which
is in the
pipe, is then tightened or released from the outside, causing the pins to move
the plates,
thus opening or closing 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 stand-
pipe. These may, for example, be plates that are moved from the outer edge of
the dia-
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phragm to the centre of the standpipe gooseneck until said plates close to
form a ring-
shaped disc with a central aperture or a disc that is completely shut. For
opening or clos-
ing, 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 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 allows the diameter of the diaphragm opening to be regulated.
[0016] A further embodiment envisages the diaphragms consisting of plates that
are 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 consistent with an embodiment that is comparable to a funnel
diaphragm. The fur-
ther the petals are pulled down, the wider the diaphragm opens. Again, there
may be any
number of diaphragms and these can be any size and made of any material. An
embodi-
ment for diaphragms that are opened by being swung up or down in the pipe in
vertical di-
rection ("iris nozzles") are known from DE 10002529 Al. However, this
specification
again does not describe 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 nega-
tive pressure entering.
[0017] A further embodiment envisages the diaphragms being equipped with a cir-
cumferential 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 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 me-
chanical drive of the regulating device can be of any design and the way in
which the ac-
tuating pulse is transmitted can be left to the technician.
[0018] In an exemplary embodiment the diaphragm can be adjusted by means of
an electric regulating device. A further embodiment envisages the diaphragm
being ad-
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justed by means of a pneumatic regulating device. In a simple embodiment a
manual ac-
tuator or regulating device is also conceivable.
[0019] The diaphragms and the actuator may be located in a gooseneck pipe sec-
tion that can be removed from the gooseneck. For this, the removable pipe
section can,
for example, 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 also be equipped with a siphon at the side that laterally passes
the stand-
pipe 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 be equipped with separate conveying devices. The siphon may be made
of any
material and be of any type.
[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 lo-
cated 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 con-
nected to the 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 stand-
pipe.
[0023] The invention also relates to a method for regulating the gas flow from
a
coke 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 bat-
tery by means of adjustable diaphragms at the standpipe gooseneck outlet
openings to
the crude gas collecting main, wherein
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= coal is coked in cycles in the coke oven chambers of a coke oven battery,
the 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 stand-
pipe 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
= the standpipe from the coke oven chamber is fed with a liquid stream flow-
ing 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 standpipe 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 si-
phon or a slit in the diaphragm.
[0024] Typically, the coke oven gas flows into the standpipe gooseneck at a
tem-
perature of 700 C to 1100 C and is cooled immediately after entry by injecting
liquid. The
remaining liquid is then discharged into the crude gas collecting main. After
cooling, the
gas typically still has a temperature of between 75 C and 120 C 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 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. 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
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9
main is interrupted by partial or complete closure of the diaphragms. In this
way air is pre-
vented from entering the crude gas collecting main (so-called "uncoupling of
the coke
oven chamber from the crude gas collecting main"). During this operation, the
liquid can
continue to flow into the crude gas collecting 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
actua-
tor 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 possible to regulate the gas pressure in the gas space of the
coke oven
chamber by altering the 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. 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 sur-
roundings. One embodiment envisages 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
ex-
ample, be moved by means of an electric drive. However, it may also be moved,
for ex-
ample, by a pneumatic drive. In a simple embodiment it is also conceivable for
the cover
plate or the diaphragm to be moved manually. One embodiment of the invention
envis-
ages the pneumatic drive being powered by a nitrogen-containing gas. Another
embodi-
ment envisages the pneumatic drive being powered by air or by an air-
containing gas.
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[0029] The liquid introduced into the gooseneck may be any kind. Preferably,
it is
water. This serves to transport the particles and scrub the coke oven gases.
One em-
bodiment 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 goose-
neck 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.
[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 col-
lecting 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 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 construc-
tion manner of the diaphragm is selected, the regulating contrivance can be
reliably
closed at all times.
[0031] The invention is illustrated on the basis of eleven diagrams, these dia-
grams merely depicting embodiments of the invention.
[0032] FIG. 1 shows an arrangement with a coke oven chamber, standpipe,
gooseneck and crude gas collecting main. FIG. 2 and FIG. 3 show a device with
a dia-
phragm in accordance with the invention, in these cases the diaphragm being of
a verti-
cally 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 diaphragm 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 horizontally opening type. FIG. 6 shows said diaphragm in
open
and FIG. 7 in closed position. FIG. 8 and FIG. 9 show a device with a
diaphragm in ac-
cordance 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 accordance with the invention in FIG. 2 to
9 are
shown in a side view. FIG. 10 and FIG. 11 show vertical views looking down at
the dia-
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11
phragms 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 oper-
ating conditions this main is filled with a liquid (7). In accordance with the
invention, an
outlet section (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 de-
vice 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 controls 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 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
ac-
cordance 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 sec-
tion (8). Shown are the crude gas stream (15), the almost completely open
vertical dia-
phragm (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 ac-
cordance 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 con-
trols 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
invention (9a), the diaphragm being of a vertically opening type and there
being a siphon
(18) in the middle of said outlet section. This is attached by means of a
suspension fixture
CA 02807439 2013-02-04
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(18a) and has an opening inside (18b). 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 through (15a). The diaphragm (9a) is
opened and
closed by means of a regulating device (10).
[0037] FIG. 5 shows an outlet section (8) with a vertically opening diaphragm
(9h)
in accordance with the invention, in this case the diaphragm being in closed
form and
there being a siphon (18) in the middle of said outlet section. This is
attached by means
of a suspension fixture (18a). The siphon has an opening inside (18b), there
being a liq-
uid coming up 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
(9h) and the effluent liquid stream (14b). The diaphragm (9b) is opened and
closed by
means of a regulating device (10).
[0038] FIG. 6 shows an outlet section (8) with a diaphragm made of plates in
ac-
cordance 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 effluent 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 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
ac-
cordance 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 an actuator (9f).
[0040] FIG. 8 shows an outlet section (8) with a diaphragm in accordance with
the
invention (9d), the diaphragm being of a horizontally opening type and there
being a si-
phon (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
horizon-
tal diaphragm (9d), the effluent liquid stream (14b) and the crude gas stream
that is al-
lowed to pass through (15a). The diaphragm (9d) is opened and closed by means
of an
actuator (9f).
= CA 02807439 2013-02-04
13
[0041] FIG. 9 shows an outlet section (8) with a diaphragm in accordance
with the
invention (9d), the diaphragm being in horizontally closed form 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-
phragm (9d) and the residual effluent liquid stream (14b). The siphon has an
opening in-
side (18b), there being a liquid coming up level thereto (17). As a result,
crude gas (15) is
prevented from passing. The diaphragm (9e) is opened and closed by means of an
actua-
tor (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
standpipe gooseneck, the plates (9a) in closed form and the regulating device
(10) with
the transmission 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
diaphragms being in closed form.
[0044] List of reference numbers and designations
1 Coke oven chamber
2 Coke, coal
3 Gas space
4 Standpipe
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
CA 02807439 2013-02-04
14
9f Actuator with slotted openings for controlling horizontal diaphragms
Regulating device
10a Transmission lever
11 Pressure gauge
12 Computer
13 Feed device for liquid
14 Liquid
14a Liquid flow in outlet section
14b Residual liquid stream
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
