EP0703289B1 - Process and apparatus for removing charging gases, produced during the charging of a coke oven battery with coal - Google Patents

Description

The invention relates to a method and a device to remove the when filling coke oven batteries with Charging gases produced according to the preambles of the claims 1 and 4.

It is from Glückauf 122 (1986), No. 5, pages 367 to 374 known that arise when filling coke ovens with coal Filling gases by means of pressurized water injection or steam injection generated negative pressure via the riser pipe to be filled Oven as well as a movable by means of the filling car at the opposite end of the chamber to so-called mini dough tubes Dockable transfer pipe (also called jumper pipe) through the gas collection chamber of a neighboring chamber in which relatively little gas is released at this time and to be introduced into the template via the riser pipe.

In this process, the gases are passed horizontally through the Coke oven chamber led to the riser pipe. This is what happens especially at the end of the filling phase and when leveling the coal Cross-sectional constrictions for the gas flow and thus to increase Filling gas pressures in the gas collection space (space above the Coal and the chamber ceiling).

This creates gas pressures within the furnace chamber and on the filling holes that lead to more or less filling gas emissions can lead mainly to the filling holes between the filling hole frame and the so-called filling telescope occur.

In order to achieve an emission-free or despite the existing conditions To achieve low-emission filling, it is necessary the suction via the riser with accordingly to operate under a high vacuum. But that in turn has Consequence, the larger amounts of carbon particles in the template be torn and affect the purity of the tar.

There is a mini riser for each chamber on the main riser opposite chamber side is needed the investment for this process is relatively high; in particular, a corresponding retrofit of a coke oven battery at most after the affected people have been shut down Oven chambers possible. Each mini riser pipe has a lid Mistake. Sealing is usually done by a Water bath. Except the investment costs for these additional Riser pipes require a considerable effort for cleaning and maintenance are operated, since it is when transferring the Gas flow comes to pollution of the water bath and the Lid need to be cleaned.

A similar, generic system is from US-A 4,004,702 known, in which the filling gas flow through a constriction reduced at the filling telescope and in the coke oven chamber should be better distributed - while accepting one longer coal filling time. A gateway can be found here with a jumper pipe for additional filling gas distribution be used.

The invention has for its object a method and a device of the type mentioned is available places with which an emission-free or at least possible low-emission filling of coal with comparatively low technical effort and minimal operating costs is made possible.

This task is accomplished by a process with the characteristics of Claim 1 and a device with the features of Claim 4 solved, preferably only one Gas manifold used, preferably to all remaining Filling holes of the coke oven chamber to be filled are connected is and only with a single filling gas transfer telescope with a single fill hole of an adjacent one Oven chamber is connected. Further training results from the subclaims.

An "adjacent" furnace chamber is - in the sense of the invention - one in which the gas to be discharged in their gas collecting space The amount of gas is so small that even those transferred there Fill gas quantities can still be removed; it must is not an immediately adjacent furnace chamber, but can e.g. also one after the next or third Act furnace chamber.

According to the invention, part of the filling gases, as from the State of the art known in the horizontal direction The riser pipe of the furnace chamber to be filled is sucked and thence to the template. In addition, the Oven chamber in the vertical direction over several, preferably over all filling holes, i.e. distributed over the chamber length, by means of a special transfer system filling gases in an adjacent furnace chamber and from there also into the Submitted. Because the filling gas in different places is suctioned out over the entire length of the furnace, cannot have high filling gas pressures, which results in emissions have more arise.

The filling gas quantity increases during the filling time (usually between 50 and 120 seconds - depending on the filling system and amount of coal -) continuously. According to this increase the pressure and temperature at the filling telescopes also increase. To take this into account, according to a training the invention, the suction performance via the detection the pressure and / or the temperature the filling telescopes adapted to the amount of filling gas.

According to a further embodiment of the invention, it is also possible the suction volume over time during the Control filling time.

• Füllteleskopen mit Ringspaltkammern zur senkrechten Füllgasableitung aus den Ofenkammern;
• einer, vorzugsweise einzigen, an die Ringspaltkammer angeschlossenen Füllgassammelletiung;
• einer, vorzugsweise einzigen, mit der Füllgassammelleitung fluidisch verbundenen Füllgasfördervorrichtung, vorzugsweise einem Gebläse, wie einem Heißgasventilator mit vorzugsweise regelbarem Volumendurchsatz sowie
• einem, vorzugsweise einzigen Füllgasüberleitteleskop zum fluidischen Verbinden der Füllgassammelleitung mit einem, vorzugsweise einzigen Fülloch einer der zu befüllenden Ofenkammer benachbarten Ofenkammer;

The transfer system according to the invention is arranged entirely on the filling truck and consists of the following components:

• Filling telescopes with annular gap chambers for vertical filling gas discharge from the furnace chambers;
• one, preferably only one, to the annular gap chamber connected filling gas collection;
• one, preferably single, filling gas delivery device fluidly connected to the filling gas manifold, preferably a blower, such as a hot gas fan with preferably adjustable volume throughput, and
• a, preferably single filler gas transfer telescope for fluidly connecting the filler gas manifold to a, preferably single filler hole of a furnace chamber adjacent to the furnace chamber to be filled;

• mindestens ein Massekühler zur Füllgastemperaturreduzierung der überzuleitenden Füllgase;
• Absperrklappen im Rohrleitungssystem zwischen den Füllteleskopen und dem Überleitteleskop;
• Temperatur- und/oder Drucksonden für die Gebläsesteuerung oder Regelung;

The following are also advantageously provided:

• at least one mass cooler for reducing the filling gas temperature of the filling gases to be transferred;
• Butterfly valves in the piping system between the filling telescopes and the transfer telescope;
• Temperature and / or pressure probes for fan control or regulation;

The furnace lid of the filling hole of the neighboring furnace chamber, through which the relevant part of the filling gases into the gas collection space the neighboring furnace chamber is transferred with an electromagnet built into the transmitter telescope or lifted off outside of it and after the transfer process has ended. The fill hole to be used for the filling gas transfer An adjacent furnace chamber can have limited space be selected accordingly on the filling truck. A limitation the transition point to the coke side - as with the well-known jumper pipes: - not applicable, i.e. that any e.g. 3 to 5 filling holes in one of the neighboring furnace chambers can be used. The transfer point is preferably located close to the riser pipe to minimize pressure losses to achieve.

A particular advantage of the invention is that Filling gas transmission telescope according to the invention a relatively simple can be constructed device in which only it is ensured that a sufficiently gas-tight connection between the preferably single filling gas manifold and the preferably only (coal) filling hole of the "neighboring" Oven chamber can be produced. Tightness and handling problems, like the famous "jumper pipes" and particularly serious when bridging several furnace chambers occur because of two gas-tight pipe connections must be produced simultaneously occur in the inventive Filling gas transmission telescopes do not open.

Figur 1 zeigt in perspektivischer ausschnittsweisen Darstellung schematisch eine Koksofenbatterie mit Füllgasabsaugung;

Figur 2 zeigt eine schematisierte Darstellung eines erfindungsgemäßen Füllgasüberleitteleskopes - zum Teil im Vertikalschnitt.

The invention is explained in more detail below with reference to the drawing:

FIG. 1 schematically shows a perspective, fragmentary representation of a coke oven battery with filling gas suction;

Figure 2 shows a schematic representation of a filling gas transmission telescope according to the invention - partly in vertical section.

It can be seen from FIG. 1 that a coke oven chamber 100 a coke oven battery 101 with coal 30 by means of one the coke oven ceiling on rails 102 movable filling car 103 is filled, with a gas collecting space 31 under the coke oven ceiling 32 remains. As indicated by arrows A, a part of the filling gases via filling holes 1, 2, 3 and 4 in known filling telescopes with annular gap chamber 5, 6, 7 and 8 (see detail drawing Fig. 1a) sucked. Because of For clarity, only the filling telescope 5 and 8 is schematic shown. Through the annular gap chambers Filling gases via pipes with butterfly valves 12, 13, 14 and 15 into a gas manifold 9, 10, 11, 17 and 20. The filling gases are in a so-called mass cooler 16 cooled if necessary. Behind the mass cooler 16 a hot gas fan 18 with adjustable drive 19 is arranged. The filling gases are then via line 20 and a filling gas transmission telescope 21, a filling hole 22 Neighboring furnace (Fig. 2) fed and, as indicated by arrows C indicated, via a riser 23 in the template 24 of the Coke oven battery sucked.

The other part of the filling gases is, as indicated by arrows B, sucked into the template 24 via a riser 25.

By dividing the filling gas suction according to the invention can the pressurized water injection or steam injection into the Risers are reduced, which saves energy and the discharge of coal particles is reduced.

The filling telescope is shown in an enlarged detail in FIG. 1a with annular gap chamber 5 shown as an example. The The right half of the figure shows the filling telescope in a lowered position and the left half in the raised position. The filling telescope 5 consists of a flexible seal 5A, two Telescopic tubes 5B and 5C and one on the mouth of the fill hole 1 gas-tight sealing ring 5D for the filling hole frame on the furnace ceiling 32. In the telescopic tubes 5B and 5C telescopic tubes 5E and 5F are arranged so that one after Annular gap chamber R open below between the telescopic tubes 5B, 5C on the one hand and 5E, 5F on the other hand, on which a pipeline 5G is connected to the gas manifold 9 is connected. Through a coal feeder 5 H is coal through the telescopic tubes 5F and 5E in the coke oven chamber 100 is filled (arrows D). The filling gases are, as indicated by arrows E, over the annular gap chamber R and the pipeline 5 G in the gas manifold sucked.

As can be seen from Figure 2, there is one at a time Filling gas manifold 20 preferably rigidly coupled Filling gas transfer telescope 21 from a flexible seal 21A, two telescopic tubes 21B and 21C and one on the Mouth of a filling hole 22 can be placed essentially gas-tight Sealing ring 21D for the filling hole frame on the furnace ceiling 32. An automatic fill hole lid lifting and Filling hole cover placement device is preferably in the area the filling gas transfer telescope provided on the filling car 103, but not specifically shown in FIG. 2, since it is known per se.

Reference list

1

Fülloch

2nd

Fülloch

3rd

Fülloch

4th

Fülloch

5

Filling telescope

5A

flexible sealing

5B

Telescopic tube

5C

Telescopic tube

5D

Sealing ring

5E

Telescopic tube

5F

Telescopic tube

5G

pipeline

6

Filling telescope

7

Filling telescope

8th

Filling telescope

9

pipeline

10th

pipeline

11

pipeline

12th

Butterfly valves

13

Butterfly valves

14

Butterfly valves

15

Butterfly valves

16

Mass cooler

17th

pipeline

18th

Hot gas fan

19th

adjustable drive

20th

pipeline

21

Transmission telescope

21A

flexible sealing

21B

Telescopic tube

21C

Telescopic tube

21D

Sealing ring

22

Fülloch

23

Riser pipe

24th

template

25th

Riser pipe

30th

coal

31

Gas collection room

32

Coke oven blanket

100

Coke oven chamber

101

Coke oven battery

102

rails

103

Filling truck

A

Arrows

B

Arrows

c

Arrows

D

Arrows

E

Arrows

R

Annular gap chamber

Claims (6)

1. A method of extracting the charging gases produced when using a charging car (103) to charge a coke oven battery (101) with coal, wherein the charging gases are piped via both the ascending pipe (25) of the oven chamber (100) to be charged and a transfer pipe, displaceable by the charging car (103), through the gas-collecting chamber of an adjacent oven chamber and via the ascending pipe (23) of the latter into the collecting main (24) of the coke oven battery (101), characterised in that some of the charging gases are extracted, via some or all of the charging holes (1, 2, 3 and 4) of the coke oven chamber (100) to be charged, by means of charging telescopes (5, 6, 7 and 8) having charging-gas transfer chambers, such as ring-gap chambers R, are collected by means of one or more gas-collecting pipes and are piped by means of one or more charging-gas transfer telescopes (21) via one or more charging holes of an adjacent oven chamber into the gas-collecting chamber thereof and via the ascending pipe (23) of the latter into the collecting main (24) of the coke oven battery (101).
2. A method according to claim 1, characterised in that the extraction power is regulated by determining the current pressure and/or the temperature at the charging telescopes (5, 6, 7 and 8) and/or in the gas-collecting pipe.
3. A method according to claim 1, characterised in that the extraction power is controlled in accordance with the lapse of time during the charging time.
4. A device for extracting the charging gases produced when using a charging car (103) to charge a coke oven battery (101) with coal, in particular for carrying out the method according to any one of claims 1 to 3, comprising a transfer arrangement provided on a charging car (103) and connectable to an adjacent oven chamber, characterised in that charging telescopes (5, 6, 7 and 8) having charging-gas transfer chambers, such as ring-gap chambers R, are provided for some or all of the charging holes (1, 2, 3 and 4) of the coke oven chamber (100) to be charged, in that the charging-gas transfer chambers, such as ring-gap chambers R, are connected to one or more transfer telescopes (21) by one or more charging-gas collecting pipes, and in that the one or more transfer telescope(s) (21) is/are arranged in a position on the charging car (103) permitting fluidic connection of the transfer telescope(s) (21) to one or more charging holes of adjacent oven chambers.
5. A device according to claim 4, characterised in that one or more hot-gas ventilators or fans (17) with adjustable delivery (19) is/are arranged in the charging-gas collecting pipe.
6. A device according to claim 5, characterised in that temperature and/or pressure sensors for controlling the hot-gas ventilator or fan (18) are provided on some or all charging telescopes (5, 6, 7 and 8) and/or in the gas-collecting pipe.

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