EP0649455B1 - Process for gas pressure regulation in the retort of a coke oven - Google Patents

Abstract

PCT No. PCT/EP93/01817 Sec. 371 Date Mar. 2, 1995 Sec. 102(e) Date Mar. 2, 1995 PCT Filed Jul. 12, 1993 PCT Pub. No. WO94/01513 PCT Pub. Date Jan. 20, 1994A process is disclosed for regulating the gas pressure in the retort of a coke oven. Pivotable cup valves arranged in the elbows of the ascending pipe are actuated as throttling members according to the pressure curve resulting from gas formation from the coal to be cokefied. Throttling of each individual retort is effected by varying water supply, thus regulating the extent of submersion in water, and regulation follows actual pressure conditions in the retort of the coke oven.

Description

The invention relates to a method for regulating or controlling the Gas pressure of a coke oven battery according to the preamble of the claim 1 and an apparatus for performing the method.

From DE-PS 955 681 it is known the gas pressure in the riser elbows of coke oven batteries by means of throttling organs a cam are connected as a control element to control. The geometry of the control disk corresponds to that usually expected pressure conditions. Through this in small steps rotational movement of the throttle body of the riser manifold is the cross section of the riser pipe from the beginning of the filling the oven chamber until the end of the cooking time according to the Pressure curve controlled during the gas formation of the coal to be coked, to keep a constant low overpressure in the Maintain chamber.

DE-AS 1 192 152 describes a method for controlling the gas pressure a coke oven chamber known in which the in the riser elbow arranged pivotable cup-shaped flaps as throttling devices according to the pressure curve at Gas formation from the coal to be coked be operated. The control takes place via a control disc, which makes one revolution per cooking period and with a lever arm for the flap is connected. In horizontal Position, the flap fills with water so that the effectively sealing liquid seal known from coking technology is obtained.

In these known controls, it is disadvantageous that all Coke ovens of a battery only according to the given one Geometry of the cam can be controlled as control elements. One of the actual gas release of the individual Oven-dependent individual chamber pressure control is not possible.

The invention has for its object to develop a method around the gas pressure of each individual coke oven chamber to be regulated individually by the present gas release or to control and / or the raw gas composition by the individual To influence chamber pressure control. Furthermore, the Invention, the object of an apparatus for performing to provide the procedure.

This task is done with regard to the procedure according to the mark of claim 1 solved.

Device-like solutions to the invention task have the claims 6 to 14.

The adjustable water immersion can be done with a conventional one Swivel cup can be anticipated. The addition of water in the swivel cup, the water drain or the overflow height adjustable be executed. Through an increased water addition is additional to the usual dive a dive inside the dip tube (inner water immersion) trained by changes the addition of water is adjustable.

With conventional swivel cups, water immersion cannot more can be reduced below the edge of the swivel cup. A decrease the diving is possible in that the known swivel cups be provided with water drainage openings. It is still possible to use the cup base as a baffle plate for an adjustable Use water immersion inside the immersion tube. As Rotary flap-type delivery valves can also be used for the Water immersion according to the invention can be used.

A swivel cup modified from conventional swivel cups owns e.g. B. a gap between the bottom of the cup and the edge of the cup, through both the water and the dive Condensates can drain off. During the filling, the invention is Swivel cup, just like the conventional swivel cup, open. You can even with the same area formation of the annular gap compared to the open riser pipe cross section also from Be closed at the beginning, because in this embodiment none Throttling effect occurs.

This controllable water immersion makes it one for the first time Separation of original pressure and chamber pressure possible. Thereby can do better suction with the same suction cross-section can be achieved by a lower original pressure, because the chamber pressure due to the separation by the adjustable water immersion no longer from the original print is dependent. The known measures can continue to reduce emissions during the filling process (Press water extraction, transfer pipe and air blowing in the leveling door, e.g. B. with bulldozer).

The maximum height of the water level inside the immersion tube by designing the cross section of the water supply line, by a thermocouple fuse or by a maximum pressure in the chamber can be limited.

The clear separation between template and chamber pressure allows an individual regulation of the pressure within each single chamber. This is done using known pressure transducers the chamber pressure z. B. on the riser foot, on the manifold, measured in the door area or another suitable location. The pressure measured in this way serves as a reference variable for a pressure control system that changes the addition of water at the water immersion.

Another option is the raw gas volume flow to be used as a reference variable for the regulation.

Of course, e.g. B. if the pressure measurement fails, too a pure control of the pressure - without comparison of setpoint / actual value - depending on the cooking time, from the Raw gas temperature in the riser pipe or another suitable one Size.

According to claim 2, the regulation of the gas pressure can be such take place in the range of the maximum height of water immersion is regulated. By increasing the dive the chamber pressure increases specifically. It becomes an opportunity created to extend the raw gas residence times. Due to cracking reactions there is a raw gas composition, e.g. B. with increased hydrogen content and reduced tar spreading.

According to claim 3, the gases with the throttle body open aspirated with reduced original pressure. Here, in there is even a negative pressure in the original. This decreased Original pressure affects the furnace chamber so that the raw gas at the start of cooking and during the cooking process can escape from the furnace chamber more easily than before and this avoids high pressures in the chamber. In order to it becomes possible to measure the chamber pressure from which in the Known higher prior art pressure depends, to decrease, since the now lower, possibly even negative original pressure take effect directly in the chamber can and thus to increased suction with reduced Raw gas residence time leads.

The shortening of the raw gas residence time leads to protection of gaseous carbohydrates. That means that e.g. B. the methane content of the gas increases while the Hydrogen content reduced. As a result, the Calorific value, the raw gas density and the Wobbe number of the gas. Furthermore, by lowering the original pressure, a causes faster raw gas extraction. This causes the coal moisture removed faster from the chamber trimmings and thus the specific energy consumption in coking is reduced.

Between the control conditions according to claim 3 or claim 2 can set any desired water immersion and be regulated.

Will the gas pressure in the furnace chamber change as a result Raw gas release less, so the chamber pressure is reduced except for one that is individually adjustable for each chamber Gas pressure. Will this predetermined chamber pressure reached or undershot, then a servomotor is used the swivel cup is actuated and thus the free cross section reduced in the gas path. Then the swivel cup does not need via a servomotor controlled by the minimum chamber pressure be closed if the same Annular gap design the cup immediately after the filling process has been closed. Because of the constantly flowing coal water the template sprinkling water gets into the closed Swivel cup. The water in the swivel cup rises Dependence on the water discharge through the outlet cross-section the cup and the incoming water a certain level of diving. This increases depending from the diving height the gas pressure in the coke oven. The Diving height can be regulated by the amount of water, so that the pressure of the individual furnace chamber individually adjustable is.

The diving height is limited by the edge height of the Swivel cup, d. that is, if the coal water flows into the Swivel cup flows, the maximum diving height is determined by the Limits cup height and the excess water runs over the swivel cup edge into the template. By regulation the amount of water inflow can be any desired diving height can be set continuously, so that in a simple way and Way the chamber pressure for each individual coke oven individually is adjustable. The pending chamber pressure is constantly measured and serves as a benchmark for the Regulation of diving. The pressure in everyone Dimension the furnace chamber so that no ambient air enters the furnace can be sucked in, d. that is, also on the furnace sole there is always a slight overpressure in the chamber.

According to claim 4, the controllable according to the invention Water immersion advantageous for the operation of coke ovens a double template can be used. The raw gas flow in one or the other template is about different Controlled dive heights; the original print of the the two templates are different and independent of the Chamber height can be set. As a result of this independence the original pressure from the chamber height can be lower than the original printing that was absolutely necessary so far can be set or even a negative pressure in the template prevalence. This causes an additional suction both templates, e.g. B. a press water suction, superfluous.

An increased raw gas extraction can be done according to the invention Original pressure adjustable independently of the chamber pressure can be reached and no longer requires a detour about an increase in the suction cross-section at the Original print that cannot be changed so far. It is despite constant raw gas extraction possible, always a minimum gas pressure maintain in the oven and so if too low Possible gas ingress into the furnace chamber to prevent.

According to claim 5, the pressure in the coke oven chamber be regulated so that the pressure is constant at the level per se known chamber minimum pressure. By doing this the emissions from all furnace leaks are compared the conventional procedure significantly reduced. Contrary to the usual procedure with the procedure according to the invention there is no danger that the coke oven chamber comes into the vacuum area and so that there is a risk of air ingress.

The swivel cup according to the invention can, just like that Riser manifold extension that acts as a dip tube, different from the above-mentioned embodiment be formed. The addition of water can also done in different ways. The different embodiments the invention are based on the Drawing explained in more detail.

Figur 1

eine Ausführungsform der erfindungsgemäßen Schwenktasse, in der

Figur 2

eine weitere Ausführungsform der erfindungsgemäßen Schwenktasse, in der

Figur 3

eine Ausführungsform, in der das Drosselorgan als Platte ausgebildet ist, in der

Figur 4

das Prinzip der Regelung des Gasdruckes einer Koksofenkammer mit der erfindungsgemäßen Schwenktasse, in der

Figur 5

das Prinzip eines wassergetauchten Doppel-Vorlagenbetriebs eines Koksofens, in der

Figur 6 und 7

weitere Ausführungsformen der erfindungsgemäßen Tasse, in der

Figur 8

verschiedene Möglichkeiten der Steigrohrkrümmerverlängerung, in der

Figur 9

eine Ausführung der erfindungsgemäßen Wassertauchung, in der

Figur 10

eine weitere Möglichkeit der erfindungsgemäßen Kammerdruckregelung, in der

Figur 11

eine spezielle Ausführungsform der Wasserregelung für die erfindungsgemäße Wassertauchung und in der

Figur 12

die Abhängigkeit des Kammerdrucks von der Garungszeit.

The drawing shows in the

Figure 1

an embodiment of the swivel cup according to the invention, in the

Figure 2

a further embodiment of the swivel cup according to the invention, in the

Figure 3

an embodiment in which the throttle element is designed as a plate in which

Figure 4

the principle of controlling the gas pressure of a coke oven chamber with the swivel cup according to the invention, in which

Figure 5

the principle of a double submersible operation of a coke oven in which

Figures 6 and 7

further embodiments of the cup according to the invention, in the

Figure 8

different options of the riser manifold extension, in the

Figure 9

an embodiment of the water immersion according to the invention, in the

Figure 10

a further possibility of the chamber pressure control according to the invention, in which

Figure 11

a special embodiment of the water control for the water immersion according to the invention and in the

Figure 12

the dependence of the chamber pressure on the cooking time.

FIG. 1 shows a swivel cup 1 with an axis 2 which the swivel cup 1 can be rotated. In horizontal Position projects into the swivel cup 1 an immersion tube 4 into it, so that a dive up to the rim of the cup 5 Swivel cup 1 is possible. Depending on the inflowing Amount of water either just overflows the gap 3 from or with increased water flow over the Gap 3 and the top of the cup 5. The amount of water can be regulated so that between the gap 3 and the Cup rim 5 every diving height is adjustable.

FIG. 2 shows a swivel cup 6 with a cone trained floor 8 and drainage columns 7, which by webs 9 are interrupted.

FIG. 3 shows a plate 10 which has an axis 11 with an adjustable stop 12 under a dip tube 13 can be pivoted. By adding water, not shown can be any water level 14 in the dip tube 13 can be set.

FIG. 4 shows the method for regulating the gas pressure shown a coke oven chamber. From FIG. 4 shows that the swivel cup 1 according to the invention Template 21 to which a riser pipe 22 Riser pipe 23 is connected, is arranged. The riser pipe is connected to a furnace chamber 24 in the usual way. On the template 21, the riser 23 and the Oven chamber 24 are pressure measuring points 15, 25, 26, 27 and 28 attached, the pressure transducers 16, 29 and 30 to one Computer 31 are connected. About the computer 31 is Valve 32 of a coal water line 33 with a regulator 17 and an actuator 18 adjustable.

The swivel cup 1 is open at the start of the cooking time and the pressure from the template 21 acts through the riser manifold 22 and the riser 23 on the furnace chamber 24. Das resulting raw gas can thus be sucked out of the furnace chamber 24 will. If the gas pressure drops at the pressure measuring points 25, 26, 27 or 28 under one specified in the computer 31 Limit value, so is an actuator via the controller 35 36 and a linkage 37 the swivel cup 1 in a horizontal Positioned. Now runs into swivel cup 1 the water from line 33, thereby increasing the pressure in the furnace chamber. If the chamber pressure reaches one in the Computer 31 preset limit value, so the water inflow reduced so far via the valve 32 that the immersion in the swivel cup 1 decreases until the chamber pressure corresponds to the desired value. In this way can, depending on the desired chamber pressure Dipping from 0 mm to maximum dipping up to the rim of the cup or increase to the inner diving height limit, there may be too much water in the water Cup edge runs into the template.

If the regulation of the diving height fails, no water can run into the oven and the chamber pressure can reach a maximum the value corresponding to the greatest internal diving height increase.

There will be no reduction in chamber pressure below that caused by the construction Desired pressure value desired This means that the water supply can be operated without being reduced be. It is a constant even without regulation Chamber overpressure, which prevents the entry of ambient air prevented in the coke oven.

In Figure 5 is the principle of a double-template operation a coke oven with the water immersion according to the invention shown.

The figure shows that a coke oven 40 with a Gas collecting space 41 two templates 42 and 43 via risers 51 and 52 and riser elbows 49 and 50 connected are. In the two templates 42 and 43 are Swinging cups 44 and 45 arranged over the sprinklers 47 and 48 can be charged with water.

At the start of cooking, the swivel cup 44 is fully open and the swivel cup 45 closed, d. that is, horizontally Position arranged. The ones present in the coke oven 40 Raw gases pass through the gas collecting space 41, riser tube 51 and the riser elbow 49 over the opened swivel cup 44 into the template 42. At the same time, the swivel cup is 45 in a horizontal position. So that the coke oven 40 is through the diving in the swivel cup 45 is separated from the template 43. Both template sprinkles 47 and 48 are in operation simultaneously.

If the raw gas composition changes in the course of the process, This means that the template can be obtained from a desired raw gas quality 42 by rotating the swivel cup 44 into the horizontal separated and the template 43 by rotating the Swivel cup 45 can be connected.

Both swivel cups 44 and 45 are in the horizontal Positioned, can by raising or lowering diving due to the decrease or increase in A water supply regulation. As a result of the pressure increase by increasing diving, e.g. B. in the swivel cup 44 of the template 42, the raw gas is through the template 43 aspirated with less immersion in the swivel cup 45.

The so-called Abwwz. Attach the two templates 42 and 43 depending on the raw gas composition, the chamber pressure and the amount of raw gas developed or depending on the cooking time. The water level in the swivel cups 44 and 45 can - as previously described - set to the desired diving height and so the chamber pressure to a desired value being held. By sufficient negative pressure in the Filling process attached template can be a previously necessary Additional suction of the filling gases with press water or a transfer tube can be dispensed with.

FIG. 6 shows a further embodiment of the invention Swivel cup. The figure shows that a swivel cup 60 with a funnel bottom 61 becomes. The funnel bottom 61 is with outflow openings 62 and 63 provided. The outflow openings 62 and 63 are in different heights. From the lower outlets 62 run the heavy condensate and Water, the lighter from the upper outlet openings 63 Condensate and water.

With the swivel cup 60, heavy condensate components can thus are continuously supplied to the outflow opening 62. Through the water drain 63, the water level in the swivel cup 60 is held at a defined height will.

FIG. 7 shows a further embodiment of the invention Swivel cup shown. A swivel cup 70 has an outflow opening 71. If the swivel cup is 70, e.g. B. for the filling process, pivoted down, the Outflow opening 71 automatically through a cleaning mandrel 72 freed of any adhering deposits.

Of course, in this embodiment too several outlets and, accordingly, several cleaning mandrels be provided.

In FIG. 8 there are various design options the riser manifold extension, which is used as a dip tube 13 acts, represented. In these embodiments changed the edge of the dip tube 13 such that a completely to the water level of the pressure control water parallel edge [Figure 8 (a)] as in the previously described Embodiment is no longer available. In Trying has turned out to be a water level parallel edge to an overshoot of the pressure control and leads to a pulsation of the diving.

If the edge, as shown in Figure 8 (b - g), is carried out, then a sudden total immersion prevented when the rising water level the edge reached. An overshoot of the pressure control is avoided.

FIG. 9 shows an embodiment of the invention Water immersion shown in which the invention Swivel cup completely eliminated. The water immersion will achieved by a U-shaped riser elbow. The U-shaped riser manifold extension 90 is provided with an outlet opening 91 for condensate and water. The raw gas passes through the riser pipe and the Riser manifold extension 90 into template 95. Sinks the chamber pressure, so by adding more water the riser irrigation increases the amount of water flowing in and thus the water level in the Riser manifold extension 90 raised and the free Gas outlet cross section can be reduced. This Cross-sectional reduction can occur until complete closure of the U-tube cross section increased to the overflow edge 94 will. This device is the one according to the invention Control of gas pressure possible without swivel cup.

A further possibility is shown in FIG Chamber pressure control according to the invention shown. Under one Riser manifold extension 101 is a vertical one Arranged in the direction of the movable tube 102, which is a dipping 103 opposite the riser manifold extension 101 is sealed. The tube 102 is corresponding with an edge 104 the embodiments of Figure 8 executed. This edge 104 dips into the original sump 105. The inventive one Chamber pressure control is carried out by different Dip tube 102 into the template sump 105. The pipe 102 cannot do any position between " immersed "and" fully immersed " Chamber pressure control is thus carried out via a stroke control of the tube 102.

The advantage of this embodiment is that a completely free and constant pipe cross-section for condensate and raw gas is present. This does not result in any Clogging problems with the condensate drain. The water level is independent of any regulation of the Water inlet. They are not wearing sealing elements available. The gasket between the manifold extension 101 and pipe 102 is done via a wear-free water immersion. Due to the Construction of water immersion can not be fixed or crumbling condensate parts from the riser manifold extension get into the dive. The Lifting device for the tube 102 can laterally, above or be arranged below the tube 102.

FIG. 11 shows a special embodiment of the water control shown for the water immersion according to the invention. A template 110 with a Riser manifold extension 111 and a swivel cup 112 is over a line 113 and 114 with sprinkling water provided. As already described, this sprinkling water can used for the water immersion according to the invention will. The percentage of water at that time is not needed for diving, is via a line 115 directly into the template. This ensures that always the total amount of water delivered reaches the template without throttling and therefore at any time the amount of water necessary to transport condensate the template swamp is available. The distribution of the Water flows with a control device 117 and is arbitrary. It only has to be guaranteed that a minimum quantity as sprinkling water for raw gas cooling Available. This minimum amount of water does not lead to any Regulatory effect with regard to water immersion.

The advantage of this embodiment is that none Pump energy is throttled for control purposes. The pumps for water supply always run under the same load. Any leaks inside the stopcocks are unproblematic and the sealing elements of the Stopcocks are subject to less pressure because the Water supply does not have to be throttled.

In FIG. 12, the chamber pressure P is a function of the cooking time t is shown. Curve 120 shows the course the chamber pressure over the cooking time according to the state of the Technology. Curve 121 shows a changed course of the Chamber pressure shown over the cooking time. This course is made possible by the water immersion according to the invention, if the template is not, as previously in the coking plant mandatory in the overpressure but in the negative pressure area is operated. With this procedure the Chamber pressure changed so far that the pressure is constant in The desired minimum chamber pressure is high. This The minimum pressure must be measured so that there is no ambient air into the oven towards the end of the cooking.

Through this change of procedure (presentation in the suction area) emissions from all furnace leaks are compared to the conventional procedure (template in overprint) considerably decreased.

By lowering the chamber pressure to one of The minimum pressure remains constant until the end of the cooking will be the differential pressure that has been significantly higher so far between the respective pressure inside and outside the chamber reduced. The cause of the occurring occurs Coke oven emissions away, although the number and size of the Leaks remain the same. It will be without further sealing measures an emission behavior of the coke oven the entire cooking time has been achieved, as was previously the case End of cooking due to progressive coking and associated lower gas development and pressure decrease Template.

When operating with the swivel cup according to the invention Process control, the swivel cup always in a horizontal position Position. Only during the filling process Swivel cup swiveled in the vertical direction.

REFERENCE SIGN LIST

1

Swivel cup

2nd

axis

3rd

gap

4th

Immersion tube

5

Cup rim

6

Swivel cup

7

Drain gap

8th

ground

9

Walkways

10th

plate

11

axis

12th

attack

13

Dip tube

14

Water level

15

Pressure measuring point

16

Pressure transducer

17th

Regulator

18th

Actuator

21

template

22

Riser elbow

23

Riser pipe

24th

Furnace chamber

25th

Pressure measuring point

26

Pressure measuring point

27

Pressure measuring point

28

Pressure measuring point

29

Pressure transducer

30th

Pressure transducer

31

computer

32

Valve

33

Coal water pipe

35

Regulator

36

Actuator

37

Linkage

40

Coke oven

41

Gas collection room

42

template

43

template

44

Swivel cup

45

Swivel cup

47

Template sprinkling

48

Template sprinkling

49

Riser elbow

50

Riser elbow

51

Riser pipe

52

Riser pipe

60

Swivel cup

61

Funnel bottom

62

lower outlet

63

upper outlet

70

Swivel cup

71

Outflow opening

72

Cleaning mandrel

90

U-shaped riser manifold extension

91

Outlet opening

94

Overflow edge

95

template

101

Riser manifold extension

102

pipe

103

Diving

104

Edge

105

Template swamp

110

template

111

Riser manifold extension

112

Swivel cup

113

management

114

management

115

management

117

Control device

120

Curve

121

Curve

Claims (14)

1. A method for regulating or controlling the gas pressure of a coke oven battery, in which a cup-shaped restrictor element arranged in the rising-pipe bends and designed to be filled with water is operated in accordance with the pressure variation during the formation of gas from coal to be coked, characterised in that the restriction of each individual oven by means of a water level adjustment in the restrictor element in dependence on the actual pressure conditions in the particular coke oven chamber is effected in such a way that, depending on the desired gas pressure in the coke oven chamber, the water level is adjusted in dependence on the outflow or inflow of the water from or into the cup-shaped restrictor element or in dependence on a predeterminable overflow level.
2. A method according to claim 1, characterised in that the restriction is effected in the region of the maximum level of the water immersion.
3. A method according to claim 1, characterised in that the restriction is effected in the region of the minimum level of the water immersion.
4. A method according to claim 1, characterised in that the water immersion which can be regulated is used with coke ovens with double collecting main operation.
5. A method according to claim 1, characterised in that the pressure in the coke oven chamber is regulated such that the pressure is constant at the level of the minimum chamber pressure which is known per se.
6. Apparatus for implementing the method according to one or more of claims 1 to 5, characterised in that a swivelling cup (1) which has one or more water outflow openings (3) between the cup base and the cup rim is arranged underneath a rising-pipe bend (22) and the swivelling cup (1) is designed so that it can be differently acted upon by water by means of a coal-water line (33) comprising a valve (32) which is connected via an operating mechanism (18) and a computer (31) to pressure measuring points (15, 25, 26, 27 and 28).
7. Apparatus according to claim 6, characterised in that the base (8) of the swivelling cup (1) is a cone with an upwardly extending apex and has discharge apertures (7) which are interrupted by bars (9).
8. Apparatus for implementing the method according to one ormore of claims 1 to 5, characterised in that a water retaining element (10) comprising a shaft (11) with an adjustable stop (12) is swivellably arranged underneath an immersion pipe (13) and a water level (14) may be created in the immersion pipe (13) by means of a coal-water line (33) comprising a valve (32) which is connected via an operating mechanism (18) and a computer (31) to pressure measuring points (15, 25, 26, 27 and 28).
9. Apparatus according to claim 6, characterised in that a swivelling cup (60) with a conical base (61) is designed with outflow openings (62) and (63) located on different levels.
10. Apparatus according to claim 6, characterised in that a swivelling cup (70) with an outflow opening (71) is designed in such a way that a cleaning mandrel (72) can be inserted when it is swivelled downwards.
11. Apparatus according to claim 6, characterised in that the rim of an immersion pipe (13) is designed so as to be oblique or is provided with recesses or openings.
12. Apparatus for implementing the method according to one or more of claims 1 to 5, characterised in that a rising-pipe bend is designed with a U-shape element (9) comprising a discharge opening (91) and an overflow rim (94) and is designed so that it can be differently acted upon by water by means of a coal-water line (33) comprising a valve (32) which is connected via an operating mechanism (18) and a computer (31) to pressure measuring points (15, 25, 26, 27 and 28).
13. Apparatus for implementing the method according to one or more of claims 1 to 5, characterised in that a pipe (102) which may be moved in the vertical direction is arranged underneath a rising-pipe bend extension (101), the said pipe being sealed off from the rising-pipe bend extension (101) by means of an immersion element (103), and the apparatus with a coal-water line (33) comprising a valve (32) which is connected via an operating mechanism (18) and a computer (31) to pressure measuring points (15, 25, 26, 27) .... ¹
14. Apparatus according to claim 6, characterised in that a collecting main (110) with a rising-pipe bend extension (111) and a swivelling cup (112) [is]² designed with ducts (113, 114 and 115) and a regulating device (117) for the water supply.

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