BR102013000278A2 - COKE OVEN DOOR AND MANUFACTURING METHOD - Google Patents

Abstract

COKE OVEN DOORS WITH CONSTRUCTION AND PERFECT INSULATING CHARACTERISTICS AND ASSOCIATED SYSTEMS AND METHODS. The present technology is directed generally to coke oven doors having improved construction and insulation characteristics and associated systems and methods. In particular, some embodiments are directed to pre-cast refractory segments mechanically fixed to oven doors with horizontal thermal restoration. In some embodiments, for example, the prefused gate segments are removably attached to a secondary door; with space present between the segments being filled with a flexible genericamenre filler. In other embodiments, the coke oven doors include flexible peripheral seals to prevent air from entering or escaping from the oven. In still other embodiments, a discussion is presented regarding pre-fused seals for multiple portions of oven doors. In other embodiments, coke ovens may include alignment factors such as ramps or ovens on a coke oven threshold and / or coke oven door assisting in door positioning and inhibiting door damage.

Description

“COKE OVEN DOORS PRESENTING CONSTRUCTION AND PERFECT INSULATING CHARACTERISTICS AND SYSTEMS AND METHODS

ASSOCIATES ”

Technical Field

The present technology is directed generally to coke oven doors and

to associated systems and methods. In particular, some embodiments are directed to pre-cast refractory segments mechanically fixed for the thermal restoration of coke oven doors.

Background

Coke consists of a solid coal fuel and a carbon source used

for the smelting and reduction of iron ore in steel production. Coalification furnaces have been used for many years to convert coal into metallurgical coke. In one type of process, known as the "Thompson Coke Process", coke is produced by batch-pulverized coal pulverized near an oven that is sealed and heated to very high temperatures for 24 to 48 hours. hours During the coking process the temperature, pressure, and air flow conditions are tightly controlled within the furnace for coal devolatilization to form a coke melt having predetermined porosity and strength.

Typically, coke ovens include an open cavity defined by a pin.

only one front door, one rear door opposite the front door, two side walls, and a roof forming the top surface of the open cavity of an oven chamber. Horizontal Heat Restoration (HHR) furnaces operate under negative pressures and are typically constructed from refractory bricks and other types of materials where the creation of a substantially hermetically sealed environment may present a challenge due to the presence small cracks that may form in these structures during daily operation. Control of the internal air flow and pressure in the furnace chamber can be a critical factor for the operating efficiency of the coking cycle.

As shown in Figure 1, a traditional coke oven door 10 consists of most of the front trim of an HHR 10 oven. Since the HHR 10 oven doors are quite wide, they are generally of difficult to remove and complex mechanical installation. For example, doors 110 tend to interpose with the oven door frame 102 (e.g., on the doorstep or lintel) during replacement or removal. This results in regular damage to the perimeter of door 110 during alignment. Since oven doors 110 are traditionally formed in the form of a single cast part, any significant damage to door perimeter 110 will require a high replacement cost and time consuming replacement of the entire door 110. In addition, minor damage to the door perimeter may spread in the form of larger defects, as the lack of flexibility and expansion of melted refractories may create a tendency to disperse cracks.

Brief Description of the Drawings

Figure 1 is a partially schematic front view illustration of a coke oven door in the prior art.

Figure 2 is a spare isometric view of a segmented coke oven door configured in accordance with the embodiments of the technology.

Figure 3 comprises a side view of a portion of a coke oven door having an edge seal and configured according to the modalities of the technology.

Figure 4A is a partially schematic front view illustration of a multipart coke oven door configured in accordance with technology embodiments.

Figure 4B is a partially schematic side view illustration of the coke oven door of Figure 4A having a sealing characteristic and configured according to the embodiments of the technology.

Figure 5A is a front isometric view of a portion of a coke oven door having alignment characteristics and configured according to technology embodiments.

Figure 5B is a front isometric view of a portion of a coke oven door having alignment characteristics and configured in accordance with other embodiments of the technology.

Detailed Description

The present technology is generally directed to coke oven doors having improved insulation and construction characteristics and associated methods and systems. In particular, some embodiments are directed to refractory, pre-cast, mechanically fixed segments for the thermal restoration of coke oven doors. In some embodiments, for example, the pre-cast door segments are removably attached to the secondary part of the door; The space between the segments is filled with a generally flexible filler. In other embodiments, the coke oven doors include flexible peripheral seals to prevent air leakage into and out of the oven. In still other embodiments, there is a description of pre-fused seals for multipart oven doors. In other embodiments, coke ovens may include alignment of features such as ramps or linings on a coke oven door sill and / or near the coke oven door to assist in positioning the door and preventing damage to the door.

Specific details of various embodiments of the technology are described hereinafter with Figures 2-5B as references. Further details describing well-known structures and systems often associated with coal processing are not given in the following description in order to avoid unnecessary deviations in the description of the various embodiments of the technology. Many of the details, dimensions, angles, and other factors shown in the Figures are for illustrative purposes only with reference to the particular embodiments of the technology. As a consequence, other modalities may present other types of details, dimensions, angles, and factors without departing from the spirit and scope of the present technology. One of ordinary skill in the art will understand that technology may support other types of modalities containing additional elements, or that technology may have other types of modalities without the inclusion of several of the characteristics set forth below. 2-5B as a reference.

Figure 2 is a rear isometric view of a segmented coke oven door 210 configured in accordance with technology embodiments. Oven door 210 may include a plurality of pre-cast segments 212 which may be attached to door 210 (e.g., next to a door installation or to secondary plate 20 232, such as a steel plate). In some embodiments, individual segments 212 are removed from port 210 for replacement or replacement without having to completely change door 210.

In various embodiments, part or all of door 210 may be made of removable segments 212. In the illustrated embodiment, for example, segments 212 comprise a central segment 204 defining a peripheral alignment. In some embodiments, individual segments 212 are mechanically fixed to each other or adjacent to secondary port 232. For example, segments 212 may be pegged to secondary plate 232 or may be coupled using other fasteners such as pins. , wedges, shim locks, etc. In a particular embodiment, segments 212 include a wedge-shaped portion while secondary plate 232 has a complementary wedge-shaped portion so that segments 212 may slide to secondary plate 232 with their respective portions. positions secured by friction adjustment of the complementary wedges. In additional embodiments, some segments, such as the central segment 204, may be fused next to the secondary plate 232, while other segments, such as the peripheral segments 21, are pegged next to the secondary plate 232 and may removed / replaced as needed. In another embodiment, the central segment 204 is removably coupled to the secondary plate 232, while the peripheral segments 212 are fused to the secondary plate 232. In yet another embodiment, the central segment 204 and the Peripheral segments 212 are all removably attached to the secondary card 232. In addition, not all segments 212 need to be the same size or shape. According to the illustration, for example, door 210 includes corners, ceiling, sidewall, and base segments, each of which has shapes / curves to form the desired door configuration. In additional embodiments, central segment 204 may consist of several individual segments. In some embodiments, air inlets 216 or other types of openings 218 may be formed in central segment 204 or in 10 other individual segments 212.

Segments 204 and 212 may comprise of refractory or insulating material (e.g., fiber insulation, melt refractory, compressed ceramic wool, or fiber ceramic). In other embodiments, segments 204 or 212 are designed from a combination of insulation materials such as fiber refractory and casting. In some embodiments, differentiated segments are made of differentiated materials and / or having different material properties. For example, in areas of door 210 traditionally prone to mechanical or thermal damage, segment materials may be selected that support these types of conditions. In a particular embodiment, the central portion 204 is made of ceramic fiber or wool and the peripheral segments 212 are formed of pre-cast refractories. In additional embodiments, segments 204 or 212 consist of multiple layers of materials, each layer comprising identical or differentiated materials. Materials can be rigid, flexible, permeable, waterproof, etc. In particular embodiments, the layers consist of insulating fiber sheet, insulating fiber, and casting refractory. In another particular embodiment, segments 212 or 214 or another portion of door 210 may comprise a flexible membrane sheet or section, such as fiber sheet, to prevent the spread of cracks through door 210. For example For example, secondary plate 232 may comprise flexible membrane and one or both ends of secondary plate 232 may be coupled to segments 204 or 212 or to other materials such as steel, precast refractory, ceramic, fillers. . etc.

In some embodiments, segments 212 are fixed to one another or sealed with a flexible, malleable, or adaptive gasket, and with filler, insulation, or joint 214 that allow for some flex / expand between segments 212 without cracking of door 210 occurs. Junction material 214 may be designed 35 from a flexible material adaptable for joining, sealing, or connecting segments 212 together, preventing heat or air transfer through port 210. In particular embodiments, the joining material 214 comprises of blanket, cable, fiberboard or a refractory material such as wool. In other embodiments, the joining material 214 alters the property of the material (e.g. hardness) upon heating. In still other embodiments, segments 212 are secured to one another with dowels or other types of fasteners.

Figure 3 is a side view of a portion of a

coke oven 310 having an edge seal 350 and configured according to the embodiments of the technology. Edge seal 350 may be coupled and extended along a peripheral surface (e.g., bottom edge 313) of door 310. In some embodiments, edge seal 350 consists of a generally reliable material configured to fit the door frame (for example the threshold) in the front of a coke oven blocking any possible flow between the door 310 and the door frame. Edge seal 350 can be used next to a by-product furnace to stop exhaust of environmentally harmful gases or it can be used for thermal restoration by interrupting the air inlet in the furnace, producing an even higher yield loss due to excess air in combustion with coke. Edge seal 350 can be designed from many different materials and shapes. For example, edge seal 350 may comprise a ceramic cable or small pre-seal, a thermally resistant flange, or any other suitable material and shape. Edge seal 350 may extend downward and / or curved away from oven door 310 or may extend laterally from door 310. In particular embodiments, edge seal 350 consists of a seal spring set to maintain the pressure in the seal against the oven door frame. Spring sealing may be in the form of V- or Z-, or it may be a traditional spiral spring. In some embodiments, the spring compresses when the door is installed and is required when the door 310 is positioned in the door frame. In additional embodiments, the edge seal 350 does not consist of a spring seal.

In additional embodiments, multiple seals may occur at edge 350, or edge sealing 350 may encompass the entire bottom edge 313 of door 310. In additional embodiments, sealing at bonnet 350 may be positioned or extended about 30 °. the other sides of the oven door 310 or around the entire periphery of door 310. Edge seal 350 may be positioned near a front 312 or rear 314 of door 310, and may be larger or smaller relative to gait thickness in other modalities. In some embodiments, edge seal 350 may be removably coupled to port 310. For example, edge seal 350 may be removably coupled to door 310 by employing C-shaped steel fasteners, rivets, or other attachment mechanisms.

Figure 4A is a partially schematic front view illustration of a coke oven door 410 featuring a half-door design employed in accordance with many stamping-loaded ovens 400. In various embodiments, a top section 420 of the door 410 is secured in position, while a bottom section 424 is removed when loading the oven 400. This may lead to the presence of a clearance 426 between the door sections allowing outward gas leakage as well as air inlet, a problem for both furnaces under positive and negative pressures. Figure 4B consists of a partially schematic side view illustration of the coke oven door 410 of Figure 4A having a sealing portion 430 and configured according to the embodiments of the technology. Referring to Figures 4A and 4B together, the sealing portion 430 may comprise an overlapping junction between the top section 422 and the bottom section 424 for generic fill gap 426.

The sealing portion 430 may comprise of different shapes in different embodiments of the technology. In the embodiment illustrated, for example, the sealing portion 430 comprises complementary wedge configurations overlapping the top section 422 and bottom 424, connecting to the top and bottom sections 422, 424. In additional embodiments, the sealing portion 430 may comprise one or more rectangles, curved sections, or other types of shapes. The sealing portion 430 may be coupled to the top section 422 or the bottom section 424, or may be coupled partly to the top section 422 or partly to the bottom section 424 (e.g., having a wedge portion coupled to each of the top and bottom sections). In other embodiments, the sealing portion 430 is not coupled to either the top section 422 or the bottom section 424 but may be removably positioned during operation. The sealing portion 430 may consist of various materials in various embodiments of the technology. For example, sealing portion 430 may consist of one or more permeable or impermeable materials, a pre-cast refractory material, a flexible / adaptable material such as a ceramic handle, or a combination of materials. In particular embodiments, the sealing portion 430 does not comprise a spring seal. In other embodiments, sealing portion 430 consists of a spring seal, such as a spring attached to a wedge at least to one of the top or bottom sections 422, 424. While sealing portion 430 It is shown by covering the gap present between a two-part door, in other embodiments such castings may be employed in the form of single oven door parts. For example, cast refractory sealing inserts may be used to fill gaps around a periphery of the oven door (for example, when the door meets the oven door frame).

Figure 5A is a front isometric view of a coke oven door 510 having alignment characteristics and configured according to technology embodiments. Oven door 510 includes a liner 552 positioned at the periphery of the door (e.g., at the bottom surface 558 of door 510). Liner 522 and bottom surface 558 are configured to interfere with complementary features 5 in the coke oven door frame providing improved alignment and reducing the risk of door damage. In particular, the oven door frame may include a conical threshold 554 and a lining support 556.

The liner 552, the liner bracket 556, and the conical threshold 554 may prevent damage to the corners / edges of door 510 during movement. More specifically, when the door 510 is removed from the oven, the door 520 may be driven and partially slid out of the oven door 554 before being suspended from the oven. This procedure can damage the refractory of door 510 by cracking from the bottom edge 558 and the corners of door 510. The liner 552 enables the bottom 558 of door 510 to slide through the oven door frame. no damage. The liner 552 allows the bottom 558 of the door 510 to slide from the oven door frame without damage. The liner 552 interleaves (for example, accommodates or slides) with the liner bracket 556. The liner bracket 556 may be suspended (relative to the rest of the door frame) to prevent the door 510 from falling. As it exits the oven door frame, Liners 552 can also be used to position / center door 510 during oven closing. For example, liners 552 may guide door 510 and align with the oven door frame. The 552 liners can improve the reliability of door positioning and removal, as well as reducing and eliminating damage to the door frame when removing and installing the door. Tapered threshold 554 provides less interference with the bottom surface 558 of door 510 and gives more room for maneuvering during door placement and removal.

While illustrating a single liner 552 and liner support 556, in additional embodiments, multiple liners 552 may occur in the door (e.g., one near a lower right corner and one near a lower left corner). 305), or a liner 552 may function for the entire bottom surface 558 of door 510. In particular embodiments, the individual liners 552 have approximately four inch cross sections. In other embodiments, the liner 552 may be placed or extended around the other sides of the oven door 510 or around the entire periphery of the door 510. Liner brackets 556 may be placed 35 in the same manner. . Similarly, tapered threshold 554 may extend around additional or alternating portions of the oven door frame.

While illustrating the liner 552 and the liner support 556 in the form of a generic block configuration, these may take on other complementary shapes in other embodiments of the technology. In addition, the liner 552 and / or the liner support 556 may consist of cast refractories, steel, ceramics, or other similarly suitable materials, or may additionally or alternatively comprise more flexible materials such as fibers. Isolation

Figure 5B is a front isometric view of a portion of a coke oven door 580 having alignment characteristics and configured in accordance with additional embodiments of the technology. Coke oven door 580 includes several features generally similar to coke oven door 510 discussed above with reference to Figure 5A. For example, coke oven door 580 includes a liner 582 positioned at the periphery of the door (e.g., bottom surface 588 of door 580). The liner 582 and bottom surface 588 are configured to interfere with complementary features near the coke oven door frame providing improved alignment and reducing the risk of damage to the door. In particular, the oven door frame may include a tapered threshold and a lining support 586. In contrast to the lining support 556 shown in Figure 5A, the lining support 586 shown in Figure 5B comprises a ramp portion 590 and a plateau 592. Liner support 586 further includes raised sidewall portions 594. In operation, the liner 582 is guided to the accommodation position on plateau 592 following the path enclosed by the ramp portion 20. 590 and the sidewall portions 594. While having the illustration of the sidewalls 594 being generally parallel, in other embodiments, the sidewalls may not be parallel and are spaced further apart at the bottom of the ramp portion. 590 than at the top of the ramp portion 590. This type of arrangement may create a path for the 582 liner to become progressively 25 as the lining 582 proceeds by ascending the ramp portion 590. The narrow of the side wall path may provide for eventual door alignment from an initial misalignment of its position.

Examples

1. Door for a thermally restored coke oven with the door comprising:

giving:

secondary plate;

plurality of pre-fused segmented portions; and

coupling mechanism configured to secure the segmented portions next to the secondary plate.

2. Example 1, further comprising of a flexible filler

positioned between at least two individual segmented portions.

3. Example 1 port where at least one of the individual segmented portions is removably coupled to the door.

4. Example 1 port, wherein the plurality of pre-fused segmented portions comprises a single central segment and a plurality of peripheral segments at least partially surrounding the central segment.

5. Example 4, where the center segment is fused to the secondary plate

and the peripheral segments are removably coupled to the secondary plate.

6. Example 1 port where the secondary plate consists of steel.

7. Example 1 port further comprising an edge seal coupled to at least one segmented portion.

8. Example 1 port, wherein the coupling mechanism comprises securely

configured to be removably attached to the segmented portions next to the secondary plate.

9. Method of manufacturing a horizontally heat-operated coke oven door, the method of which comprises:

forming a plurality of gate segments;

coupling of the door segments to the secondary portion; and

filling the space between the door segments.

The method of example 9, wherein the space between the individual door segments comprises filling the space with a generally insulating material.

flexible.

The method of example 9, wherein forming a plurality of gate segments comprises pre-casting the segments.

12. The method of example 9, wherein the coupling of the door segments to the secondary portion comprises at least one of the segments fused or forcibly secured.

removable handle near the secondary portion.

13. Coke oven door, comprising:

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 with the peripheral portion.

14. Example 13, wherein the flexible seal comprises at least one ceramic cable or elongated flange.

15. Example 13, wherein the peripheral portion comprises at least one corner portion, and where the seal is coupled to the corner portion.

16. Example 13 port where flexible seal is removably coupled

near the peripheral portion.

17. Coke oven door for a negative pressure coking system, with the door comprising:

top portion;

bottom portion, where the bottom portion is at least partially distanced from the top portion; and seal coupled to at least one of the top or bottom portions and

configured to span the gap between the top portion and the bottom portion.

18. Example 17 port, wherein the seal comprises of a pre-cast refractory material.

19. Example 17, where the seal comprises the overlap of the wedge shapes.

20. Example 17 port, wherein the seal comprises a generally flexible, non-locking seal.

21. Example 17 port, wherein the seal comprises of a spring seal.

22. Coke oven door system, comprising:

coke oven door having a first surface, a second surface and a

opposite surface to the first surface, and a peripheral portion existing between the first surface and the second surface;

liner positioned at the peripheral portion; and

coke oven door frame configured to receive the coke oven door, wherein the door frame includes a raised liner support portion for interposing with the liner.

23. The system of example 22, wherein at least a portion of the door frame comprises of a conical surface.

24. The system of example 22, wherein the lining support portion comprises of a cast refractory.

25. Example 22 system, wherein the liner and the liner support comprise of cast refractors.

26. The system of example 22, wherein the lining support portion comprises at least one raised sidewall portion configured to improve alignment of the

Coke oven door in the door frame.

The systems and methods discussed in this report offer several advantages over traditional coke oven doors. For example, segmented doors provide easier and cheaper oven door repair, as only a portion of the door must be removed and replaced if damaged. The flexible joint material present between the segments enables the door to flex without cracking the refractory. In addition, different materials can be used selectively in areas where the thermal and mechanical stresses are greatest, optimizing the functionality and durability of the door. Combining the door segments with the secondary part of the door may provide increased door strength. The doors described in this report may further prevent leakage in stamped-loaded oven doors by employing an overlapping sealing portion overlying the gaps between two-piece doors. In addition, the edge seals described in this report may reduce oven leakage and air ingress. The linings described in this report can be placed on the oven doors or the door frame to prevent damage to the oven, aiding door alignment during positioning and removal.

From the previous exposition it can be observed that, although the modalities

technology-specific have been described in this report for illustrative purposes, various modifications may be made without departing from the spirit and scope of the technology. For example, the technology described in this report can be used on any type of horizontal thermal restoration furnace or other coke oven models. While certain aspects have been illustrated or discussed in terms of positioning in the central or peripheral portion of an oven door, in other embodiments, such aspects may be located at other positions in the door or oven. In addition, certain aspects of the new technology described in the context of particular embodiments may be combined or eliminated in other embodiments. Moreover, while advantages associated with certain embodiments of technology have been described in the context of those embodiments, other embodiments may also exhibit such advantages, and not all features necessarily need to exhibit such advantages in order to be included in the invention. technology scope. Accordingly, the descriptive part and associated technology may encompass other embodiments not expressly set forth or described in this report. Accordingly, the description is unrestricted except for the content of the claims framework.

Claims (26)

1. Door for a thermally restored coke oven, CHARACTERIZED by the fact that the door comprises: secondary plate; plurality of pre-fused segmented portions; and coupling mechanism configured to secure the segmented portions next to the secondary plate. Door according to claim 1, characterized in that it further comprises a flexible filler positioned between at least two individual segmented portions. Door according to claim 1, characterized in that at least one of the individual segmented portions is removably coupled to the door. Door according to claim 1, characterized in that the plurality of pre-fused segmented portions comprise a single central segment and a plurality of peripheral segments at least partially surrounding the central segment. Door according to Claim 4, characterized in that the central segment is fused to the secondary plate and the peripheral segments are removably coupled to the secondary plate. Door according to claim 1, characterized in that the secondary plate consists of steel. Door according to claim 1, characterized in that it further comprises an edge seal coupled to at least one segmented portion. Door according to claim 1, characterized in that the coupling mechanism comprises fasteners configured to be removably attached to the segmented portions adjacent to the secondary plate. 9. Method of manufacturing a horizontally heat-operated coke oven door, characterized in that the method comprises: forming a plurality of door segments; coupling of the door segments to the secondary portion; and filling the space between the door segments. A method according to claim 9, characterized in that the space between the individual door segments comprises filling the space with a generally flexible insulation material. A method according to claim 9, characterized in that forming a plurality of gate segments comprises pre-casting the segments. Method according to claim 9, characterized in that the coupling of the door segments near the secondary portion comprises at least one of the segments which is fused or removably attached to the secondary portion. 13. Coke oven door, characterized in that it comprises: 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 with the peripheral portion. Door according to Claim 13, characterized in that the flexible seal comprises at least one ceramic handle or an elongated flange. Door according to claim 13, characterized in that the peripheral portion comprises at least one corner portion, and where the seal is coupled to the corner portion. Door according to Claim 13, characterized in that the flexible seal is removably coupled to the peripheral portion. 17. Coke oven door for a negative pressure coking system, characterized in that the door comprises: top portion; bottom portion, where the bottom portion is at least partially distanced from the top portion; and seal coupled to at least one of the top or bottom portions and configured to span the gap between the top portion and the bottom portion. A door according to claim 17, characterized in that the seal comprises a pre-cast refractory material. 19. Door according to claim 17, characterized in that the seal comprises overlapping wedge shapes. Door according to Claim 17, characterized in that the seal comprises a generally flexible spring-free seal. Door according to claim 17, characterized in that the seal comprises a spring seal. 22. Coke oven door system, characterized in that it comprises: coke oven door having a first surface, a second surface opposite the first surface, and a peripheral portion existing between the first surface and the second surface; liner positioned at the peripheral portion; and coke oven door frame configured to receive the coke oven door, wherein the door frame includes a raised liner support portion for interposing with the liner. System according to claim 22, characterized in that at least a portion of the door frame comprises a conical surface. System according to claim 22, characterized in that the lining support portion comprises molten refractory. System according to claim 22, characterized in that the liner and the liner support comprise molten refractories. System according to Claim 22, characterized in that the lining support portion comprises at least one raised sidewall portion configured to improve alignment of the coke oven door in the door frame.