EP0065328A2 - Verfahren zur Reparatur einer Koksofenbatterie und dazu verwendbare Wand - Google Patents

Verfahren zur Reparatur einer Koksofenbatterie und dazu verwendbare Wand Download PDF

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Publication number
EP0065328A2
EP0065328A2 EP82200525A EP82200525A EP0065328A2 EP 0065328 A2 EP0065328 A2 EP 0065328A2 EP 82200525 A EP82200525 A EP 82200525A EP 82200525 A EP82200525 A EP 82200525A EP 0065328 A2 EP0065328 A2 EP 0065328A2
Authority
EP
European Patent Office
Prior art keywords
panel
walls
repair
coking
ducts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82200525A
Other languages
English (en)
French (fr)
Other versions
EP0065328B1 (de
EP0065328A3 (en
Inventor
Hermanus Johannes Dries
Floris Blaas
Jan Klootwijk
Peter Stephanus Snijders
Bernardus Antonius Wijnandus Van De Vegt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoogovens Groep BV filed Critical Hoogovens Groep BV
Publication of EP0065328A2 publication Critical patent/EP0065328A2/de
Publication of EP0065328A3 publication Critical patent/EP0065328A3/en
Application granted granted Critical
Publication of EP0065328B1 publication Critical patent/EP0065328B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00—Other details of coke ovens
    • C10B29/06—Preventing or repairing leakages of the brickwork
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
    • F27B13/06—Details, accessories, or equipment peculiar to furnaces of this type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D2001/1605—Repairing linings
    • F27D2001/161—Hot repair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D2021/0057—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects

Definitions

  • the invention relates to a method of repair of a coke-oven battery during operation in which at least one coking chamber is taken out of operation and emptied, is repaired and reintroduced into operation.
  • the invention also relates to a panel for use in the method.
  • a coke oven battery of a type conventional in practice consists of a structure made of refractory material with coking chambers arranged within it. A plurality of combustion chambers are arranged between each adjacent pair of coking chambers.
  • the coking chambers generally each measure approximately 45cm wide, 4 to 6 m high and about 10 m long.
  • the side walls of the coking chambers are generally made of silica bricks.
  • the overall coefficient of expansion of the silica material is such that the material has about 1% expansion from room temperature to 500°C, and a further expansion of around 0.1% from 500°C to the operating temperature, which is around 1200°C.
  • Silica's expansion characteristic makes it an ideal material when the battery is in operation, because when the coke is pushed out at the end of the coking period and the coking chamber is subsequently refilled with coking coal, the temperature of the refractory material undergoes a temporary reduction without falling. below 500°C, which means that the refractory material only contracts and expands to a slight degree. This means that cracks do not readily form.
  • the temperature of the coking chamber needs to be greatly reduced, which means entering the temperature range below 500°C in which the silica material undergoes substantial contraction. This causes fresh and larger cracks in the side walls. Through these cracks, there will be further gas leakages between the combustion chambers and the coking chamber, when the chamber is brought back into operation, and in extreme cases the stability of the side walls may be endangered.
  • the invention has as its object to provide a method of repair of a coke-oven battery during operation in which the conditions for the worker in the insulated coking chamber are improved, and particularly in which the temperature of the air in which he works approaches room temperature.
  • the insulation material includes at least one panel which comprises a layer of thermally insulating material and ducts through which cooling fluid is passed during the repair operation.
  • the panel is located against a side-wall of a coking chamber, with the insulating layer adjacent the wall and the ducts on the inside with respect to the working space.
  • Fluid cooling is known in a screen providing protection for workmen (see US 3 550 679). However it is the combination of an insulating layer and fluid cooling which is surprisingly effective in the present invention, and can achieve about room temperature in the working space even with a relatively thin panel (e.g. 5cm).
  • the panels may be positioned alongside one side wall. It is also possible for one panel only to be positioned alongside one side wall.
  • One or more panels may be used to create a screened-off space without being positioned alongside a side wall. Insofar as the working space is not screened off from the hot coking chamber walls by means of panels, this may for example by effected with blankets of insulating material or the like.
  • the repair affects one coking chamber only. It is then preferable to create a screened-off space inside the chamber using panels positioned alongside both hot walls of the chamber.
  • the screened-off space should preferably be created in two or more adjacent coking chambers and the panels positioned alongside the two outermost side walls of the group of adjacent coking chambers.
  • the temperature of each side wall alongside which a panel is located is silica, it is preferable for the temperature of each side wall alongside which a panel is located to be maintained at a minimum of 500°C.
  • One possible way in which the method may be executed consists of moving the screened-off space within the coking chamber during the repair operation.
  • the screened-off area is movable longitudinally in the coking chamber.
  • the panel used in the method of the invention is preferably provided with at least one working opening through which work on the wall behind can be performed.
  • each opening of this type is capable of being closed individually.
  • the area in which the repair is effected may be narrow.
  • the preferred choice for the cooling fluid is water, which will serve to minimise the thickness of the screen.
  • the panel ducts comprise a number of parallel pipes, which may be rigidly linked together by connecting elements.
  • the pipes are preferably rectangular in cross-section.
  • the connecting elements may also be rectangular in cross-section and these elements may be connected to the ducts by means of welding.
  • One useful form of panel has a U-shape, such that one face of the panel has mutually opposed regions.
  • the graph of Fig. 1 shows a typical expansion of the material silica as a percentage along the vertical axis, and the temperature in C along the horizontal axis. Once the material is brought up to a temperature of 500°C, the expansion does not exceed 0.1% over an extensive temperature range above 500°C. When the temperature drops below 500°C, substantial contraction of the material occurs, which has proved capable of producing cracks in the side walls of the coking chambers of a coke-oven battery made of thin material.
  • Figs. 2 and 3 illustrate an extensive repair to a coke-oven battery.
  • the coking chambers 1 of a part of a coke-oven battery 2 are in a refractory material structure which also comprises the combustion chambers 3.
  • the coking chambers are bounded by their side walls 4, and are closed during charging of the coking coal and coking period by means of doors 5.
  • predominantly vertical cracks develop in the side walls, above all in the vicinity of the doors. These cracks may give rise to leakage of gas between one or more combustion chambers and a coking chamber.
  • Fig. 2 illustrates a situation where the side walls of two adjacent coking chambers are so severely cracked that a part 6 of the refractory-material structure between them needs to be demolished and replaced by a new structure.
  • Figs. 4 and 5 illustrate a different repair operation, in which the cracks or other faults which have occurred in the side walls 4 of a coking chamber 1 may be repaired by injecting refractory material.
  • Figs. 6 and 7 illustrate a special repair.
  • the combustion chambers 3 are supplied with air and gas through the floor 7 via supply ducts 8. These ducts may be blocked by fallen parts of the refractory structure in which the combustion chambers are arranged, so that combustion cannot take place in the combustion chambers, which means that no heat is supplied to the adjacent coking chambers, and hence coking does not take place at the point where the combustion chamber is located.
  • Figs. 8,9 and 10 illustrate a suitable panel design.
  • the area available for repair purposes in a coking chamber is greatly restricted by its minimal width.
  • the flat panel of the invention has ducts 11 for the passage of a cooling fluid and is provided with a layer of insulation material on one side 12.
  • the pipes 13 used for the ducts 11 in this embodiment are rectangular with a cross-section of, for example 25 x 50 mm, welded together in a parallel arrangement using cross-connecting elements in the form of pipes 14 which are likewise rectangular in cross section, measuring, for example 20 x 20 mm.
  • the preferred coolant is water. Although its choice as cooling fluid is not obvious in view of the risk of it leaking into the coking chamber which is still hot, water is preferred because of its high specific heat and high coefficient of heat, which enables the cross-section of the ducts to be minimised.
  • the preferred material for the insulation layer is a blanket of ceramic fibre with a high insulating value, such as for example Triton (trade mark) Kao-Wool, mainly consisting of A1 2 0 3 and Si0 2 measuring 25 mm thick.
  • Triton (trade mark) Kao-Wool mainly consisting of A1 2 0 3 and Si0 2 measuring 25 mm thick.
  • the cooling fluid is supplied through supply pipe 15 to a supply duct 16 and, after passing through the ducts 11, is discharged via an outlet duct 18 and an outlet pipe 19.
  • the supply duct 16 and outlet duct 18 are separated from one another by a partition 20.
  • the pipes 13 are connected to the ducts 16 and 18 and the casing 17 by welding.
  • the connecting pipes 14 do not, however, run right through to the ducts 16 and 18 and the casing 17 at the point 20a.
  • Figs. 2 to 7 show the repairs being effected by a person 27 in a space 26 screened off from the hot coke oven walls which has been created by using at least one panel 10 of the type illustrated in Fig. 8.
  • two panels 10 are positioned alongside the respective outermost side-walls 4 with the layer 12 of insulating material on the side of the panel 10 which faces towards the side walls. These panels extend the full height of the side walls.
  • the parts of the two coking chambers which are not being repaired are partitioned off by temporary walls 22 covered with insulation material 25. Much thicker and therefore less vulnerable walls are formed by the oven roof 23 and generator roof 24. This serves to create a screened-off space 26 in which the worker 27 can demolish and relace the part 6 of the refractory material. structure.
  • a similar screened-off space 26 is created in a single coking chamber.
  • one panel 28 has a working opening 29 which may be closed by a door 31 which pivots on an axis 30.
  • a person 27 in the screened-off space 36 may thus carry out repair through the opening 29, e.g. using injection techniques.
  • the panel or panels may contain several of these working openings which as desired may or may not be capable of being closed. Provision is made for the screened-off space to be moved within the coking chamber. In this instance it is proposed more specifically that the screened-off area be moved in a horizontal direction longitudinally of the chamber as indicated by arrows 32.
  • the side walls 4 are covered for part of their height by a panel 10 and a panel 28 with a working opening 29.
  • the top and bottom boundaries of the working space 26 are constituted by a panel 33 of the design shown in Fig. 11, which contains pipes 13 and 14 as shown in Fig. 8 but these are bent in this case into a U shape to form a U-shaped panel 33, which is provided with a layer 12 of insulation material on the outside.
  • the screened-off space 26 (see Figs. 6 and 7) formed by the panels 10,28 and 22 may easily be moved within the coking chamber in the direction indicated by the arrows 32 for instance using rollers or rails as shown at 34.
  • an insulation partition is temporarily fitted in the door opening to the coking chamber above the screened-off space.
  • a person 27 in the space 26 takes a part of the refractory structure, e.g. a brick, out of the side wall through the working opening 29, thus enabling the combustion chamber to be cleaned, after which the repair opening 35 made in the side wall is closed again.
  • Fig. 12 illustrates the drop in temperature 36 from a side wall 4, through a panel 10 positioned alongside this side wall, to a coking chamber.
  • the dimensions of the panel and the extent of the cooling action of the fluid in the cooling duct system 11 are such that the conditions created on the side of the panel facing away from the side wall 4 in the working space 26 are suitable for personnel to carry out repair operations therein. If additionally necessary, the area is ventilated.
  • the major part of the temperature drop occurs in the layer of insulation material 12.
  • the surface temperature of side wall 4 is at least 500°C. This protects the side wall from the adverse effects of the excessive cooling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP19820200525 1981-05-11 1982-05-03 Verfahren zur Reparatur einer Koksofenbatterie und dazu verwendbare Wand Expired EP0065328B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8102281A NL8102281A (nl) 1981-05-11 1981-05-11 Werkwijze voor het repareren van een kookskamer en paneel te gebruiken daarbij.
NL8102281 1981-05-11

Publications (3)

Publication Number Publication Date
EP0065328A2 true EP0065328A2 (de) 1982-11-24
EP0065328A3 EP0065328A3 (en) 1983-05-18
EP0065328B1 EP0065328B1 (de) 1985-07-24

Family

ID=19837471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820200525 Expired EP0065328B1 (de) 1981-05-11 1982-05-03 Verfahren zur Reparatur einer Koksofenbatterie und dazu verwendbare Wand

Country Status (4)

Country Link
EP (1) EP0065328B1 (de)
CA (1) CA1218332A (de)
DE (1) DE3264884D1 (de)
NL (1) NL8102281A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921579A (en) * 1983-03-14 1990-05-01 Hotwork, Inc. Method of pre-heating a coke oven
EP0421147A1 (de) * 1989-10-06 1991-04-10 Krupp Koppers GmbH Verfahren und Vorrichtung zur Heissreparatur der Heizzüge einer Koksofenbatterie
US6539602B1 (en) * 1999-07-05 2003-04-01 Kawasaki Steel Corporation Method of repairing coke oven

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179635A (en) * 1939-01-17 1939-11-14 Koppers Co Inc Coke-oven operating appliance
DE1247552B (de) * 1964-10-09 1967-08-17 Schwarzkopf Fa Hans Verfahren zur Haarverfestigung mit farbveraendernder Wirkung
US3550679A (en) * 1969-02-26 1970-12-29 Nat Steel Corp Water cooled platform and method of repairing copings employing the same
DE2122729A1 (de) * 1971-05-07 1972-11-16 Heinrich Koppers Gmbh, 4300 Essen Verfahren und Vorrichtung zur Erneuerung von Teilen einer Heizwand einer Horizontalkammer-Koksofenbatterie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179635A (en) * 1939-01-17 1939-11-14 Koppers Co Inc Coke-oven operating appliance
DE1247552B (de) * 1964-10-09 1967-08-17 Schwarzkopf Fa Hans Verfahren zur Haarverfestigung mit farbveraendernder Wirkung
US3550679A (en) * 1969-02-26 1970-12-29 Nat Steel Corp Water cooled platform and method of repairing copings employing the same
DE2122729A1 (de) * 1971-05-07 1972-11-16 Heinrich Koppers Gmbh, 4300 Essen Verfahren und Vorrichtung zur Erneuerung von Teilen einer Heizwand einer Horizontalkammer-Koksofenbatterie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921579A (en) * 1983-03-14 1990-05-01 Hotwork, Inc. Method of pre-heating a coke oven
EP0421147A1 (de) * 1989-10-06 1991-04-10 Krupp Koppers GmbH Verfahren und Vorrichtung zur Heissreparatur der Heizzüge einer Koksofenbatterie
US6539602B1 (en) * 1999-07-05 2003-04-01 Kawasaki Steel Corporation Method of repairing coke oven

Also Published As

Publication number Publication date
CA1218332A (en) 1987-02-24
EP0065328B1 (de) 1985-07-24
NL8102281A (nl) 1982-12-01
EP0065328A3 (en) 1983-05-18
DE3264884D1 (en) 1985-08-29

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