WO2014105066A1 - Portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et systèmes et procédés associés - Google Patents

Portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et systèmes et procédés associés Download PDF

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Publication number
WO2014105066A1
WO2014105066A1 PCT/US2012/072178 US2012072178W WO2014105066A1 WO 2014105066 A1 WO2014105066 A1 WO 2014105066A1 US 2012072178 W US2012072178 W US 2012072178W WO 2014105066 A1 WO2014105066 A1 WO 2014105066A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
coke oven
segments
seal
cast
Prior art date
Application number
PCT/US2012/072178
Other languages
English (en)
Inventor
Gary Dean WEST
Original Assignee
Suncoke Technology And Development Llc.
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 Suncoke Technology And Development Llc. filed Critical Suncoke Technology And Development Llc.
Priority to PCT/US2012/072178 priority Critical patent/WO2014105066A1/fr
Priority to BR102013000278-0A priority patent/BR102013000278B1/pt
Publication of WO2014105066A1 publication Critical patent/WO2014105066A1/fr

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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 present technology is generally directed to coke oven doors and associated systems and methods.
  • some embodiments are directed to mechanically attached, precast refractory segments for heat recoveiy coke oven doors.
  • Coke is a solid carbon fuel and carbon source used to melt and reduce iron ore in the production of steel.
  • Coking ovens have been used for many years to covert coal into metallurgical coke.
  • coke is produced by batch feeding pulverized coal to an oven that is sealed and heated to very high temperatures for 24 to 48 hours.
  • temperature, pressure, and air flow conditions are tightly controlled within the oven to devolatilize the coal and form a fused mass of coke having a predetermined porosity and strength.
  • coke ovens typically include an open cavity defined by a floor, a front door, a rear door opposite the front door, two sidewalls, and a crown which forms the top surface of the open cavity of an oven chamber.
  • Horizontal Heat Recovery (HHR) ovens operate under negative pressure and are typically constructed of refractory bricks and other materials in which creating a substantially airtight environment can be a challenge because small cracks can form in these structures during day-to-day operation. Controlling air flow and pressure inside the oven chamber can be critical to the efficient operation of the coking cycle.
  • a traditional coke oven door 1 10 comprises the majority of the front face of a HHR oven 100. Since HHR oven doors 110 are so large, they are generally difficult to remove and install without mechanical difficulty. For example, the doors 1 10 have a tendency to interface with the oven door frame 102 (e.g., the sill or lintel) during placement or removal. As a result, damage regularly occurs to the perimeter of the door 1 10 during alignment. Since oven doors 1 10 are traditionally formed as a single piece that is cast in place, any significant damage to the perimeter of the door 1 10 requires expensive and time-consuming replacement of the entire door 1 10 . Further, minor damage in the door perimeter can propagate into a larger defect, as the lack of flexibility and expansion in the cast refractory creates a tendency for cracks to spread.
  • the oven door frame 102 e.g., the sill or lintel
  • Figure 1 is a partially schematic, front view illustration of a coke oven door in the prior art.
  • Figure 2 is back isometric view of a segmented coke oven door configured in accordance with embodiments of the technology.
  • Figure 3 is a side view of a portion of a coke oven door having an edge seal and configured in accordance with embodiments of the technology.
  • Figure 4A is a partially schematic, front view illustration of a multi-part coke oven door configured in accordance with embodiments of the technology.
  • Figure 4B is a partially schematic, side view illustration of the coke oven door of Figure 4A having a sealing feature and configured in accordance with embodiments of the technology.
  • Figure 5 A is a front, isometric view of a portion of a coke oven door having alignment features and configured in accordance with embodiments of the technology.
  • Figure 5B is a front, isometric view of a portion of a coke oven door having alignment features and configured in accordance with further embodiments of the technology.
  • the present technology is generally directed to coke oven doors having improved construction and insulation features and associated systems and methods.
  • some embodiments are directed to mechanically attached, pre-cast refractory segments for horizontal heat recovery coke oven doors.
  • pre-cast door segments are removably fastened to a door backing; space between the segments is filled with a generally flexible filler material.
  • coke oven doors include flexible peripheral seals to prevent air leaking in and out of the oven.
  • pre-cast seals for multi-part oven doors are disclosed.
  • coke ovens can include alignment features such as ramps or pads on a coke oven sill and/or a coke oven door to aid in door placement and inhibit door damage.
  • FIG. 2 is back isometric view of a segmented coke oven door 210 configured in accordance with embodiments of the technology.
  • the oven door 210 can include a plurality of precast segments 212 that can be attached to the door 210 (e.g., to a door mounting or backing plate 232, such as a steel plate).
  • individual segments 212 are removable from the door 210 for repair or replacement, without having to replace the entire door 210.
  • all or part of the door 210 can be made of the removable segments 212.
  • the segments 212 comprise a periphery outlining a central segment 204.
  • the individual segments 212 are mechanically attached to one another or to the backing plate 232.
  • the segments 212 can be bolted to the backing plate 232 or can be coupled using other fasteners such as pins, wedges, shim locks etc.
  • segments 212 include a wedge shape portion and the backing plate 232 has a complementary wedge shape portion, such that the segments 212 can slide into the backing plate 232 and be secured in position by the friction fit of the complementary wedges.
  • some segments, such as the central segment 204 can be cast to the backing plate 232 while other segments, such as the periphery segments 212, are bolted to the backing plate 232 and can be removed/replaced as needed.
  • the central segment 204 is removably coupled to the backing plate 232 while the periphery segments 212 are cast to the backing plate 232.
  • the central segment 204 and periphery segments 212 are all removably attached to the backing plate 232. Further, not all segments 212 need be the same size or shape.
  • the door 210 includes corner, crown, sidewall, and base segments, each having different shapes/curvatures to form the desired door shape.
  • the central segment 204 can comprise several individual segments.
  • air inlets 216 or other apertures 218 can be formed in the central segment 204 or other individual segments 212.
  • the segments 204 and 212 can comprise a refractory material or insulating material (e.g., fiber insulation, castable refractory, compressed ceramic wool, or fiber ceramic).
  • segments 204 or 212 are made of a combination of insulating materials, such as fiber and cast refractory.
  • different segments are made of different materials and/or have different material properties. For example, in areas of the door 210 that are traditionally prone to mechanical or thermal damage, segment materials can be selected to withstand these conditions.
  • the central portion 204 is made of ceramic fiber or wool and the periphery segments 212 are made of pre-cast refractory.
  • segments 204 or 212 comprise multiple layers of materials, wherein each layer comprises the same or different materials.
  • Materials can be rigid, flexible, permeable, impermeable, etc.
  • layers comprise insulating fiberboard, insulating fiber, and cast refractory.
  • segments 204 or 212 or another portion of the door 210 can comprise a sheet or section of flexible membrane, such as fiberboard, to inhibit crack propagation through the door 210.
  • the backing plate 232 can comprise the flexible membrane and one or both sides of the backing plate 232 can be coupled to segments 204 or 212 or other materials, such as steel, pre-cast refractory, ceramic, filler, etc.
  • the segments 212 are attached to one another or sealed with a generally flexible, malleable, or conformable gasket, filling, insulating, or joining material 214 that allows some flexing/expansion between segments 212 without cracking the door 210.
  • the joining material 214 can be a flexible or conformable insulating material to join, seal, or connect the segments 212 together and inhibit air and heat transfer through the door 210.
  • the joining material 214 comprises a blanket, rope, fiberboard, or a refractory material such as wool.
  • the joining material 214 changes material property (e.g., hardness) upon heating.
  • the segments 212 are attached to one another with bolts or other fasteners.
  • Figure 3 is a side view of a portion of a coke oven door 310 having an edge seal 350 and configured in accordance with embodiments of the technology.
  • the edge seal 350 can be coupled to and extend along a peripheral surface (e.g., a bottom edge 313) of the door 310.
  • the edge seal 350 comprises a generally flexible material configured to conform to the door frame (e.g., the sill) on the front of a coke oven to block draft flowing between the door
  • the edge seal 350 can be used on a by-product oven to stop the leakage of hazardous gases into the environment or on a heat recovery oven to stop air from leaking into the oven and causing a higher yield loss from excess air burning the coke.
  • the edge seal 350 can be made of many different materials and shapes.
  • the edge seal 350 can comprise a ceramic rope or tadpole seal, a thermal-resistant flange, or other suitable shape and material.
  • the edge seal 350 can extend downward and/or curve away from the oven door 310 or extend laterally from the door 310.
  • the edge seal 350 comprises a spring seal configured to maintain pressure on the seal against the oven door frame.
  • the spring seal can be V- or Z- shaped, or a traditional spiral spring. In some embodiments, the spring compresses when the door is installed and is spung when the door 310 is in position in the door frame. In further embodiments, the edge seal 350 is not a spring seal.
  • edge seals 350 there can multiple edge seals 350, or the edge seal 350 can run the entire bottom edge 313 of the door 310.
  • the edge seal 350 can be placed on or extend around other sides of the oven door 310 or around the entire periphery of the door 310.
  • the edge seal 350 can be positioned closer to a front 312 or back 314 of the door 310, and can be larger or smaller relative to the door thickness in other embodiments.
  • the edge seal 350 can be removably coupled to the door 310.
  • the edge seal 350 can be removably coupled to the door 310 using C-shaped steel fasteners, rivets, or other attachment means.
  • Figure 4 A is a partially schematic, front view illustration of a coke oven door 410 having a half-door design, as employed by many stamp-charged ovens 400.
  • a top section 422 of the door 410 is fixed in place while a bottom section 424 is removed when charging the oven 400. This can leave a gap 426 between the door sections that allows gases to leak out as well as air to leak in, a problem for both positive- and negative-pressure ovens.
  • Figure 4B is a partially schematic, side view illustration of the coke oven door 410 of Figure 4A having a sealing portion 430 and configured in accordance with embodiments of the technology. Referring to Figures 4 A and 4B together, the sealing portion 430 can comprise an overlapping joint between the top section 422 and the bottom section 424 to generally fill the gap 426.
  • the sealing portion 430 can comprise different shapes in different embodiments of the technology.
  • the sealing portion 430 comprises complementary wedge-shapes that overlap the top section 422 and bottom section 424 and latch into the top and bottom sections 422, 424.
  • the sealing portion 430 can comprise one or more rectangles, curved sections, or other shapes.
  • the sealing portion 430 can be coupled to the top section 422 or the bottom section 424, or can be coupled to the top section 422 in part and the bottom section 424 in part (e.g., having a wedge portion coupled to each of the top and bottom sections).
  • the sealing portion 430 is not coupled to either of the top section 422 or the bottom section 424, but instead is removably placed in position during use.
  • the sealing portion 430 can comprise various materials in various embodiments of the technology.
  • the sealing portion 430 can comprise one or more a permeable or impermeable material, a pre-cast refractory material, a flexible/conformable material such as ceramic rope, or a combination of materials.
  • the sealing portion 430 is not a spring seal.
  • the sealing portion 430 is a spring seal, such as a spring attached to a wedge on at least one of the top or bottom sections 422, 424.
  • sealing portion 430 is shown covering the gap between a two-part door, in further embodiments, such cast pieces can be used with single- piece oven doors.
  • cast refractory seal inserts can be used to fill gaps around a periphery of the oven door (e.g., where the door meets the oven door frame).
  • FIG. 5 A is a front, isometric view of a portion of a coke oven door 510 having alignment features and configured in accordance with embodiments of the technology.
  • the oven door 510 includes a pad 552 positioned on the door periphery (e.g., on a bottom surface 558 of the door 510).
  • the pad 552 and bottom surface 558 are configured to interface with complementary features on the coke oven door frame to provide for improved alignment and reduced risk of door damage.
  • the oven door frame can include a tapered sill 554 and a pad support 556.
  • the pad 552, pad support 556, and tapered sill 554 can prevent damage to the edges/corners of the door 510 during door movement. More specifically, when the door 510 is removed from the oven, the door 510 can be pulled out and partially slid off the oven sill 554 before being lifted from the oven. This can damage the door 510 refractory, such as cracks propagating from the bottom edge 558 and corners of the door 510.
  • the pad 552 allows the bottom 558 of the door 510 to slide from the oven door frame without damage.
  • the pad 552 interfaces with (e.g., rests upon or slides across) the pad support 556.
  • the pad support 556 can be elevated (relative to the rest of the door frame) to prevent the door 510 from dropping as it exits the oven door frame.
  • the pads 552 can further be used to place/center the door 510 during oven closing. For example, the pads
  • the tapered sill 554 provides less interference with the bottom surface 558 of the door 510 and allows more room to maneuver during door placement and removal.
  • pad 552 and pad support 556 there can be multiple pads 552 on the door (e.g., one near a lower right corner and one near a lower left corner of the door 510), or the pad 552 can run the entire bottom surface 558 of the door 510.
  • individual pads 552 have approximately four-inch square cross-sections.
  • the pad 552 can be placed on or extend around other sides of the oven door 510 or around the entire periphery of the door 510.
  • the pad supports 556 can be positioned likewise.
  • the tapered sill 554 can extend around alternate or additional portions of the oven door frame.
  • pad 552 and pad support 556 are illustrated as generally block-shaped, they can have other complementary shapes in other embodiments of the technology. Further, the pad 552 and/or pad support 556 can comprise cast refractory, steel, ceramic, or other similarly suitable material, or can additionally or alternately comprise a more flexible material such as an insulating fiber.
  • FIG. 5B is a front, isometric view of a portion of a coke oven door 580 having alignment features and configured in accordance with further embodiments of the technology.
  • the coke oven door 580 includes several features generally similar to the coke oven door 510 discussed above with reference to Figure 5 A.
  • the coke oven door 580 includes a pad 582 positioned on the door periphery (e.g., on a bottom surface 588 of the door 580).
  • the pad 582 and bottom surface 588 are configured to interface with complementary features on the coke oven door frame to provide for improved alignment and reduced risk of door damage.
  • the oven door frame can include a tapered sill 584 and a pad support 586.
  • the pad support 586 illustrated in Figure 5B comprises a ramp portion 590 and a plateau 592.
  • the pad support 586 further includes elevated sidewall portions 594.
  • the pad 582 is guided into resting position on the plateau 592 by following the pathway enclosed by the ramp portion 590 and sidewall portions 594.
  • These features provide for improved alignment and placement of the door 580.
  • the illustrated sidewalls 594 are shown to be generally parallel, in further embodiments the sidewalls can be non-parallel, such as spaced father apart at the bottom of the ramp portion 590 than at the top of the ramp portion 590. This arrangement can create a pathway for the pad 582 that becomes increasingly narrow as the pad 582 proceeds up the ramp portion 590.
  • the narrowing sidewall pathway can provide for eventual door alignment from an initially laterally-misaligned position.
  • a door for a horizontal heat recovery coke oven comprising:
  • coupling means configured to attach individual segmented portions to the backing plate.
  • a method of manufacturing a horizontal heat recovery coke oven door comprising:
  • filling the space between individual door segments comprises filling the space with a generally flexible insulating material.
  • coupling the door segments to the backing portion comprises at least one of casting or removably fastening the segments to the backing portion.
  • a coke oven door comprising:
  • a coke oven door having a first surface, a second surface opposite the first surface, and a peripheral portion between the first surface and the second surface; and a generally flexible seal coupled to the peripheral portion.
  • the flexible seal comprises at least one of a ceramic rope or an elongated flange.
  • peripheral portion comprises at least one corner portion, and wherein the seal is coupled to the corner portion.
  • a coke oven door for a negative pressure coking system comprising:
  • bottom portion wherein the bottom portion is at least partially spaced apart from the top portion
  • a seal coupled to at least one of the top portion or the bottom portion and configured to span the space between the top portion and the bottom portion.
  • a coke oven door system comprising:
  • a coke oven door having a first surface, a second surface opposite the first surface, and a peripheral portion between the first surface and the second surface; a pad positioned on the peripheral portion;
  • a coke oven door frame configured to receive the coke oven door, wherein the door frame includes an elevated pad support portion configured to interface with the pad.
  • pad support portion comprises a tapered portion, a plateau portion, and at least one elevated sidewall portion.
  • pad support portion comprises at least one elevated sidewall portion configured to improve alignment of the coke oven door in the door frame.
  • the systems and methods disclosed herein offer several advantages over traditional coke oven doors.
  • the segmented doors provide easier and cheaper oven door repair, as only a portion of the door must be removed and replaced if it is damaged.
  • the flexible joining material between segments allows door flexing without cracking the refractory.
  • different materials can be selectively utilized in areas of greater mechanical or thermal stress to optimize door functionality and durability.
  • the combination of the door segments with the door backing can provide increased strength in the door.
  • the doors disclosed herein can further resolve leaks in stamp-charging oven doors with the use of an overlapping sealing portion to cover the gap between the two-piece doors.
  • the edge seals disclosed herein can reduce air in- and out-leakage to the oven.

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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)

Abstract

La technologie de la présente invention concerne, de manière générale, des portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et des systèmes et des procédés associés. En particulier, certains modes de réalisation concernent des segments réfractaires attachés mécaniquement, précoulés pour des portes de four à coke horizontales à récupération de chaleur. Dans certains modes de réalisation, par exemple, des segments de porte précoulés sont fixés de manière amovible à l'arrière de la porte ; l'espace entre les segments est rempli d'un matériau de remplissage généralement souple. Dans d'autres modes de réalisation, les portes de four à coke comprennent des joints périphériques souples pour éviter la fuite d'air vers et hors du four. Dans encore d'autres modes de réalisation, des joints précoulés pour des portes de four à pièces multiples sont divulgués. Dans d'autres modes de réalisation, les fours à coke peuvent comprendre des caractéristiques d'alignement, telles que des rampes ou des patins sur une sole de four à coke et/ou une porte de four à coke pour faciliter le placement de la porte et empêcher un endommagement de la porte.
PCT/US2012/072178 2012-12-28 2012-12-28 Portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et systèmes et procédés associés WO2014105066A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2012/072178 WO2014105066A1 (fr) 2012-12-28 2012-12-28 Portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et systèmes et procédés associés
BR102013000278-0A BR102013000278B1 (pt) 2012-12-28 2013-01-04 sistema de porta de forno de coque e método de fabricação do mesmo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/072178 WO2014105066A1 (fr) 2012-12-28 2012-12-28 Portes de four à coke présentant des caractéristiques de construction et d'isolation améliorées et systèmes et procédés associés

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WO2014105066A1 true WO2014105066A1 (fr) 2014-07-03

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WO (1) WO2014105066A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5928476A (en) * 1997-08-19 1999-07-27 Sun Coal Company Nonrecovery coke oven door
US6189819B1 (en) * 1999-05-20 2001-02-20 Wisconsin Electric Power Company (Wepco) Mill door in coal-burning utility electrical power generation plant
US20040168902A1 (en) * 2003-02-27 2004-09-02 Baird Billy Carr Coke oven door
US20060049641A1 (en) * 2004-09-03 2006-03-09 Barkdoll Michael P Coke oven rotary wedge door latch
JP2012102302A (ja) * 2010-11-15 2012-05-31 Jfe Steel Corp コークス炉の窯口構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5928476A (en) * 1997-08-19 1999-07-27 Sun Coal Company Nonrecovery coke oven door
US6189819B1 (en) * 1999-05-20 2001-02-20 Wisconsin Electric Power Company (Wepco) Mill door in coal-burning utility electrical power generation plant
US20040168902A1 (en) * 2003-02-27 2004-09-02 Baird Billy Carr Coke oven door
US20060049641A1 (en) * 2004-09-03 2006-03-09 Barkdoll Michael P Coke oven rotary wedge door latch
JP2012102302A (ja) * 2010-11-15 2012-05-31 Jfe Steel Corp コークス炉の窯口構造

Also Published As

Publication number Publication date
BR102013000278A2 (pt) 2014-05-27
BR102013000278B1 (pt) 2020-12-15

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