EP0163773A2 - Porte de four à coke à chambres horizontales - Google Patents

Porte de four à coke à chambres horizontales Download PDF

Info

Publication number
EP0163773A2
EP0163773A2 EP84116214A EP84116214A EP0163773A2 EP 0163773 A2 EP0163773 A2 EP 0163773A2 EP 84116214 A EP84116214 A EP 84116214A EP 84116214 A EP84116214 A EP 84116214A EP 0163773 A2 EP0163773 A2 EP 0163773A2
Authority
EP
European Patent Office
Prior art keywords
coke oven
door according
oven door
shaped profiles
protective shield
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
EP84116214A
Other languages
German (de)
English (en)
Other versions
EP0163773B1 (fr
EP0163773A3 (en
Inventor
Wolfang Dr. Ing. Becker
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.)
RAG AG
Original Assignee
Ruhrkohle AG
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
Priority claimed from DE19843440311 external-priority patent/DE3440311A1/de
Priority claimed from DE19843440312 external-priority patent/DE3440312A1/de
Application filed by Ruhrkohle AG filed Critical Ruhrkohle AG
Publication of EP0163773A2 publication Critical patent/EP0163773A2/fr
Publication of EP0163773A3 publication Critical patent/EP0163773A3/de
Application granted granted Critical
Publication of EP0163773B1 publication Critical patent/EP0163773B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • C10B25/00—Doors or closures for coke ovens
    • C10B25/02—Doors; Door frames
    • C10B25/06—Doors; Door frames for ovens with horizontal chambers

Definitions

  • the invention relates to a coke oven door for a horizontal chamber coking oven with a one-piece or multi-part protective shield, which at the same time serves as heat protection and protrudes into the oven chamber and is connected to the door body, via which the oven filling is held at a certain distance from the door body, the door body during of the coking process is pressed against the door frame of the furnace with at least one locking device.
  • Such coke oven doors are also included in the older proposal P 33 27 337.5. This proposal is aimed at a novel design of the door body with the associated sealing device.
  • the new door body is characterized in particular by its lightweight construction, price advantages compared to conventional doors and by its high, permanent sealing effect. According to P 33 27 337.5, the new door body is partially combined with conventional fire-resistant door plugs.
  • German patent 23 83 63 also discloses a door for coke ovens with an adjustable protective shield attached to the rear wall, the protective shield being connected to the rear of the door by articulated intermediate members and being able to move relative to the door.
  • the protective shield connected by articulated intermediate elements to the rear of the door should be lockable from the outside in its respective position by an adjusting device.
  • the protective shield is designed as a flat, one-piece plate with rear stiffening ribs.
  • the usual heights of coke ovens were 1.5 to 2 m. With such low door heights, the overall deformation of the protective shield may still be within the tolerance range. With today's coke oven heights of 4 m, 6 m and in the future 8 m and more, the total deformation of the protective shield would either result in openings between the soleplate and the protective shield and between the protective shield and chamber walls such that excessive amounts of coal penetrate between the protective shield and the door body. This effect would be significantly increased with dry coking coal, especially preheated coal.
  • US Pat. No. 40 86 145 It attempts to counteract the faults by connecting and supporting the protective shield on the furnace body as intensively as possible. Intensive means here:
  • the protective shield is connected to the door body via at least one web running the entire length of the protective shield.
  • support rods are provided on both sides of the web.
  • two webs running at a distance from one another are provided, which are additionally stiffened by lateral ribs.
  • this approach has primarily thermal engineering
  • German Offenlegungsschrift 31 05 703 there is shown a protective shield that is built like a scale, i.e. H. consists of a large number of smaller, overlapping individual parts. Each item is attached separately. The smaller individual parts are subject to the same overall thermal expansion as a one-piece protective shield. The absolute degree of thermal expansion of each individual part is, however, much lower than that of a one-piece protective shield. Due to the individual suspension of the various individual parts and the overlapping arrangement of the individual parts, the thermal deformation of each individual part does not have an excessive effect on the other individual parts. The total heat deformation is within acceptable limits.
  • the invention takes a different route either while maintaining a one-piece protective shield. Or, using a multi-part protective shield, adverse heat loads should be avoided.
  • the invention is based on the following considerations: Operating difficulties can arise in the raw gas duct between the door body and the protective shield. This is attributed to the fact that the raw gas channel in doors of this type is totally expanded and the gas pressure which then arises, depending on the supply pressure of the coke oven battery, more or less averaged over a short period of cooking over the door height from positive to negative values, i.e. H. The original overpressure then creates negative pressure. This creates suction.
  • the invention further assumes that in a coke oven not filled with coking coal or in a protruding coke oven (coke pressing has been delayed), the protective shield used heats up to such an extent in a short time that increased heat radiation via the protective shield unhindered both on the door body and also. acts on the chamber frame.
  • the effect of heat leads to uncontrolled deformation on the one hand on the conventionally cast door body (thereby causing door leakage) and on the other on the chamber frame. Due to the increasing bending of the chamber frame, the frame joint between the masonry and the chamber frame is exposed on the chamber frame. A so-called frame joint leakage occurs.
  • the invention takes into account the fact that, at the usual coke oven temperatures, the protective shield explained above tends to warp continuously over the height of the coke oven due to its geometry as a flat, one-piece surface. This causes the already explained risk that when a coke oven door is inserted or removed, the protective shield will cling to the oven walls and be torn off. The consequences are also damage to the furnace walls. Furthermore, the distortion of the shield that occurs increases the opening width of the two gaps between the shield and the coke oven walls. This increases the unwanted amount of coal in the raw gas channel. With low water contents (less than 10% by weight H 2 0) of the input coal mixture, the coal accumulation in the expanded raw gas channel is particularly large.
  • coal leads to disadvantages of the uncontrolled formation of condensate in the area of the door seal due to the low head temperatures or forms a semi-coke plug of different heights, which has to be removed manually and time-consuming by the operating personnel after each furnace run.
  • the additional shield creates two raw gas channels, the inner, coke-side raw gas channel and the outer, door body side raw gas channel can be called. With several additional shields, more raw gas channels are created.
  • the raw gas discharge quantity can be controlled or equalized in such a way that the raw gas pressure on the sealing surface between the coke oven door and the chamber frame is optimized in the measurable positive range.
  • the heat radiation of the door body to the outside is reduced by the protective shield facing the door body acting as an crane.
  • additional protective shields ecranes
  • the high heat radiation which arises is kept away from the door body and from the chamber frame, in particular by the Purization effect in the case of protruding or empty coke ovens.
  • the Compization effect ensures a uniform temperature drop along the head masonry, starting from the protective shield in contact with the coal or coke towards the door body.
  • the wall thicknesses of the protective shields according to the invention can be made considerably thinner than known protective shields. This has two main advantages: first, it reduces the temperature gradient in the above sense, second, they are Protective shields according to the invention with sufficient dimensional stability overall lighter than the known protective shields.
  • connection of the same protective shields is particularly advantageous. According to the invention, these are then preferably arranged in mirror symmetry. This gives the protective shields additional dimensional stability.
  • the protective shield on the door body counteracts any deformation and bulging of the coke-side protective shield.
  • Cross-sectional geometries with different moments of resistance are preferably selected according to the invention. This means that the protective shield on the door body side has a greater section modulus than in the opposite direction against deformation directed away from the coke. This gives the restoring forces of the additional protective shield an additional effect.
  • the coke-side protective shield can be replaced if damaged against the door body-side protective shield and vice versa.
  • Different profiles can also be combined with one another. This can be used to increase the resistance moments of the protective shield on the door body side.
  • the protective shields according to the invention are generally less expensive than known other protective shields.
  • the profiles forming the shields are arranged in such a way that - seen in longitudinal section at least two protective shields composed of shots are arranged one behind the other.
  • the other versions refer to two shields, but apply accordingly to 3 or more shields or corresponding shots with the same number of profiles.
  • the use of at least two profiles according to the invention means that the shots can be made considerably longer compared to the multi-part protective shield known from DE-OS 31 o5 7o3. While in contemporary coke ovens with a furnace height of 6 to 7 m, a maximum of about 1 m length is considered to be reliable for the shots of a known sign, shots according to the invention have a multiple of this length, e.g. only three shots for an 8 meter high door. This has considerable manufacturing and handling advantages.
  • a further reduction in costs can be achieved by using cross-sectional profiles for the protective shields, which correspond to the profiles of commercially available steel sheet piling or light profiles or panel profiles.
  • the protective shields are parallel to one another or inclined to one another over their entire height.
  • the coke-side protective shield is again arranged vertically, so that only the shield on the door body side is inclined.
  • the inclination is chosen such that a pressure loss of 1 mm water column is compensated for every running meter of furnace height.
  • the distance between the protective shields can be made changeable by interchangeable spacers which are evenly distributed over the height of the protective shields.
  • the gas discharge quantities in the gas discharge duct between the two protective shields can also be regulated.
  • its temperature load can be influenced. H. a certain desired or permissible door body temperature can be ensured by appropriate distance.
  • the overall distance from the door body can be changed while the distance between the protective shields remains the same, in the same or opposite sense. The flow conditions in both gas discharge channels can thus be optimized.
  • the sealing plates are optionally provided with open slots on the side towards the middle of the chamber and have bolts or spacers for hanging them up.
  • the sealing plates are moved laterally inwards in the elongated holes or slots in the protective shields; ie are sunk between the protective shields, the sealing plates then move outwards against the chamber walls when the protective shields are put on.
  • the application of the sealing strips creates an advantageous seal between the protective shields and chamber walls.
  • the sealing plates are bent or bent sideways on their contact surface with the chamber walls. In a horizontal section through a sealing plate, this results in an S-shaped or Z-shaped or angular cross section.
  • the beveled or bent leg of this cross-section ensures gentle contact with the chamber walls and at the same time gives the sealing plates excellent dimensional stability in the longitudinal direction.
  • the furnace chamber with the associated heating or chamber walls is indicated by 1.
  • Chamber 1 To the vertical opening of the oven. Chamber 1 runs the door frame 7, on which the sealing member 6 rests against an inserted coke oven door.
  • the coke oven door consists, as described for example in the German patent application P 33 27 337.5, of a door body; with a power transmission unit and a sealing unit.
  • the power transmission unit runs as a hollow profile along the door frame and is connected to the door frame at least via a locking device.
  • the locking device is designed as a spring lock. These include locking hooks on the door frame 7 and pivotable locking bars on the door body, which act on the door body 7 via springs or power pistons.
  • the sealing unit has a sealing plate 5, which is pressed against the door frame on the circumference of the door frame by means of many evenly distributed and spring-mounted screws 4. With 5 a is a cover that serves the insulation. To improve the thermal insulation towards the outside, the sealing plate 5 can be designed as a hollow profile, the hollow profile being filled with insulating compound 5 b.
  • the sealing plate can be provided with a one-sided bulge according to Figures 1 and 7 to the outside.
  • angle irons are attached distributed over the height, of which angle irons 15 are screwed to further angle irons 14 via screws 16, which in turn are connected to a shaped profile 9 as an external protective shield.
  • the connection between the shaped profile 9 and the angle iron 14 is made by hanging the shaped profile 9 with suitable hooks 9 a on the angle iron 14.
  • flanges or other profiles or screws can also be used.
  • Another shape profile is attached to the shape profile 9 in mirror image as a protective shield by means of bolts 13 with spacers.
  • FIGS. 1 and 2 the positions of the shaped profiles are shown at a greater distance from one another at 18, 19 in dashed form.
  • Figures 4 and 5 the difference between the smaller and larger distance between the shaped profiles from each other is made clear.
  • FIG. 5 a several shots are arranged one above the other in a protective shield.
  • the shaped profiles of the inner protective shield 8 forming the wefts overlap, while the shaped profiles of the outer protective shield 9 abut one another with sufficient play for thermal expansion.
  • the distance between the inner protective shield 8 and the sealing surface between the door body and the door frame 7 is 400 mm.
  • the distance between the two protective shields is 120 mm. This corresponds to the usual stone plug depth.
  • the ratio of the distance between the two protective shields 8 and 9 to the distance between the outer protective shield 9 and the sealing surface between the protective body and the door frame 7 is between 1: 1 and 1:10, preferably between 1: 3 and 1 : 5.
  • FIG. 3 shows a number of possible cross sections for the shaped profiles.
  • the shaped profiles can be rolled in one piece and / or folded and / or bent, or can be composed of several parts. The parts can be screwed or welded. In the simplest case, the shaped profiles are designed as smooth sheets.
  • the cross sections according to FIG. 3 are advantageous. While according to FIG. 1, the shaped profiles are laterally connected to one another in cross section and have bulges in the middle between the connection points, the reverse is true according to FIG. 3.1.
  • the shaped profiles according to FIG. 3.1 are at a small distance in the middle and the shaped profiles are connected to one another there via the bolts 13, while they are at a greater distance from the outside of the chamber walls.
  • the protective shields then again run parallel to each other on the outside.
  • the protective shields can also be curved in the form of a circular arc towards the chamber walls or angularly bent outwards according to FIG. 3.6.
  • the ends are first curved outwards in the form of a circular arc and then again inwards in a semi-circular manner, so that the ends are directed towards one another.
  • Figures 3.1 to 3.4 also contain various middle bulges, which are triangular, semicircular or trapezoid-like on the outside.
  • FIGS. 6 and 7 show additional sealing plates 24 which are provided with elongated holes 25.
  • only one row of sealing plates is provided between the two shaped profiles 8 and 9.
  • several rows of sealing plates can also be behind can be arranged between the shaped profiles 8 and 9, or distributed over several shaped profiles arranged one behind the other.
  • the sealing plates 24 are as close as possible to the outer molded profile 9 in order to hinder the gas entry into the outer raw gas channel between the molded profile 9 and the door body and to relieve the sealing member 6.
  • FIG. 6 shows the raised state of the shaped profiles in the left half.
  • the sealing plate 24 has moved away from the chamber wall 2 in the raised state or has been pressed inwards and downwards by a plunger 26. It protrudes below the shape profile.
  • the protective shields and sealing plates 24 stand on the furnace sole and the sealing plate 24 has leaned against the chamber wall 2.
  • the sealing plate movement is up to 60 mm compared to the shaped profiles 8 and 9.
  • the gap between the shaped profiles 8 and 9 and the chamber wall 2 is up to 20 mm in the exemplary embodiment, depending on the width of the coke oven chamber. E.g. 15 mm gap are provided with an average chamber width of 45 cm.
  • the S-shaped shape of the sealing plate 24 can also be seen from FIG. 7, the sealing plates lying against the inside of the outer molded profile 9 and outside a vertical gap for the gas passage remaining between the molded profile 8 and the sealing plates.
  • the various sealing plates 24 of the three shots of multi-part protective shields shown in FIG. 5 a are optionally connected to one another via joints which, when the door is placed in the furnace chamber, transmit the upward movement of the lowest sealing plates 24 to the sealing plates arranged above them. The same applies to the downward movement. Ie should be a leak If you hesitate to lift yourself from the chamber wall by moving downwards, this resistance is overcome by the weight of the other sealing strips. Hinges with two hinge joints can serve as joints, which secure a power transmission in the vertical direction and leave freedom of movement horizontally in the longitudinal direction of the furnace chamber.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP19840116214 1984-01-05 1984-12-22 Porte de four à coke à chambres horizontales Expired EP0163773B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3400223 1984-01-05
DE3400223 1984-01-05
DE3440311 1984-11-05
DE3440312 1984-11-05
DE19843440311 DE3440311A1 (de) 1984-01-05 1984-11-05 Koksofentuer
DE19843440312 DE3440312A1 (de) 1984-01-05 1984-11-05 Schutzschild fuer koksofentuer

Publications (3)

Publication Number Publication Date
EP0163773A2 true EP0163773A2 (fr) 1985-12-11
EP0163773A3 EP0163773A3 (en) 1986-03-12
EP0163773B1 EP0163773B1 (fr) 1987-05-06

Family

ID=27191596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840116214 Expired EP0163773B1 (fr) 1984-01-05 1984-12-22 Porte de four à coke à chambres horizontales

Country Status (7)

Country Link
EP (1) EP0163773B1 (fr)
BR (1) BR8500021A (fr)
CA (1) CA1267863A (fr)
ES (1) ES8605564A1 (fr)
MX (1) MX162171A (fr)
PL (1) PL142823B1 (fr)
SU (1) SU1572417A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223028A3 (fr) * 1985-11-18 1988-03-02 Ruhrkohle Aktiengesellschaft Porte de four à coke à chambres horizontales

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2421500C2 (ru) * 2009-01-29 2011-06-20 Сергей Иванович Разгонов Дверь камеры сгорания печи

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE238363C (fr) *
FR967677A (fr) * 1948-06-07 1950-11-09 Masque pour portes de fours
ATE3724T1 (de) * 1979-11-08 1983-06-15 Wsw-Planungsgesellschaft Mbh Koksofentuer mit grossvolumigem gassammelraum.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223028A3 (fr) * 1985-11-18 1988-03-02 Ruhrkohle Aktiengesellschaft Porte de four à coke à chambres horizontales

Also Published As

Publication number Publication date
BR8500021A (pt) 1985-08-13
EP0163773B1 (fr) 1987-05-06
MX162171A (es) 1991-04-04
CA1267863A (fr) 1990-04-17
PL251454A1 (en) 1985-11-05
SU1572417A3 (ru) 1990-06-15
EP0163773A3 (en) 1986-03-12
PL142823B1 (en) 1987-12-31
ES8605564A1 (es) 1986-04-01
ES539299A0 (es) 1986-04-01

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