Catalyst door system

{
  "publication_number": "US6412221B1",
  "country": "US",
  "kind": "B1",
  "title": "Catalyst door system",
  "abstract": "A high temperature industrial door having a flexible door plate with notches about the periphery thereof for receipt of swing bolts. The door plate includes interior insulation and is suspended from and hinged to a door frame using a davit assembly. In the closed position, the lower edge of the door extends below floor level. To open the door, the davit assembly allows the door to be lifted above floor level and moved to an open position, by pivoting of the davit assembly.",
  "claims": [
    "1. A door system having a generally vertical door opening of a building, the building having a floor adjacent the door opening, the door system further comprising: a door panel at least partially covering the door opening of the building, said door panel having a lower portion extending below the level of the floor of the building; a davit arm connected to the building for pivotal movement with respect to the building; said davit arm being connected to the door panel for allowing said door panel to be moved between a closed position and an open position with respect to the door opening of the building; and a jack connected to said door panel and to said davit arm and allowing said lower portion of said door panel to be selectively lifted from a position below the level of the floor of the building to a position above the level of the floor of the building.",
    "2. The door system as defined in claim 1, further comprising a door frame for attachment adjacent to the door opening of the building, and wherein said door panel bears against said door frame when said door panel is in said closed position.",
    "3. The door system as defined in claim 1, further comprising: a door frame for attachment adjacent to the door opening of the building; said door frame defining peripheral portions and said peripheral portions including a plurality of fasteners, wherein said fasteners engage and force said door panel against said door frame when said door panel is in said closed position.",
    "4. The door system as defined in claim 1, further comprising: a door frame for attachment adjacent to the door opening of the building; said door frame defining peripheral portions and said peripheral portions including a plurality of fasteners; and said door panel defining a plurality of slots for receipt of said fasteners, wherein said fasteners engage and force said door panel against said door frame when said door panel is in said closed position.",
    "5. The door system as defined in claim 1, further comprising: a door frame for attachment adjacent to the door opening of the building; said door frame defining peripheral portions and said peripheral portions including a plurality of pivoting bolts; and said door panel defining a plurality of slots for receipt of said pivoting bolts, wherein said pivoting bolts engage and force said door panel against said door frame when said door panel is in said closed position.",
    "6. The door system as defined in claim 1, wherein said jack includes: a rod, one end of which is fixedly attached to said davit arm, and the other end of which being threaded; a bracket attached to said door panel, said bracket defining a bore for receipt of said threaded end of said rod; and a nut threadingly attached to said threaded end of said rod, such that upon selective rotation of said nut, said nut bears against said bracket and forces said bracket and said door panel upwardly.",
    "7. A door system as defined in claim 1, further comprising: a gasket for sealing said door panel when said door panel is in said closed position; and an elongated channel member connected to said door panel for receipt of said gasket, said channel member having a generally dovetail-shaped cross section for allowing expansion of said gasket upon sealing of said door panel when said door panel is in said closed position.",
    "8. A door system as defined in claim 1, further comprising: a gasket for sealing said door panel when said door panel is in said closed position, said gasket being generally square in cross sectional shape; and an elongated channel member connected to said door panel for receipt of said gasket, said channel member having a generally dovetail-shaped cross section for allowing expansion of said gasket upon sealing of said door panel when said door panel is in said closed position.",
    "9. A door system having a generally vertical door opening of a selective catalytic reactor structure, the structure having an interior floor surface and an exterior floor surface adjacent the door opening, the door system further comprising: a door panel at least partially covering the door opening of the structure, said door panel having a lower portion adapted for extending below the level of the interior floor surface; a davit arm connected to the structure for pivotal movement with respect to the structure; said davit arm being connected to the door panel for allowing said door panel to be moved between a closed position and an open position with respect to the door opening of the structure; and a screw jack connected to said door panel and to said davit arm, such that upon selective actuation of said screw jack, said lower portion of said door panel is lifted from a position below the level of the interior floor of the structure to a position above the level of the exterior floor of the structure.",
    "10. A method of installing a door for a generally vertical door opening in the exterior wall of a selective catalytic structure, the structure having an interior floor surface adjacent the door opening, the method comprising: providing a door frame defining a doorway opening having a lower threshold portion; providing a door panel for receipt in said doorway; positioning said door frame such that said lower threshold portion is at substantially the same elevation as the interior floor surface; positioning said door panel such that a lower edge thereof extends below the elevation of the interior floor surface and such that said doorway is in general alignment with the door opening of the structure; attaching said doorway to the structure; and attaching said door panel to said door frame for movement between an open position, wherein said doorway is generally unobstructed, to a closed position, wherein said doorway is generally covered by said door panel.",
    "11. The method as defined in claim 10, wherein said attaching of said door panel to said door frame includes: providing a davit assembly; attaching said davit assembly to the structure; and connecting said davit assembly to said door panel.",
    "12. The method as defined in claim 10, wherein said attaching of said door panel to said door frame includes: providing a davit assembly; attaching said davit assembly to the structure; connecting said davit assembly to said door panel; providing a jack mechanism; and attaching said jack mechanism to said door panel for allowing the selective lifting and lowering of said door panel.",
    "13. The method as defined in claim 10, further comprising: providing an exterior floor surface adjacent the door opening; and providing a recess in said exterior floor surface for receipt of said lower edge of said door panel when said door panel is in said closed position.",
    "14. A method of operating a door for a generally vertical door opening of a selective catalytic structure, the structure having an interior floor surface and an exterior floor surface adjacent the door opening, the exterior floor surface having a recess extending below the door opening and the level of the interior floor surface, the method comprising: providing a door panel for at least partially covering the door opening of the structure, said door panel having a lower portion extending below the level of the interior floor surface; providing a davit arm connected to the structure for pivotal movement with respect to the structure; providing a jack connected to said door panel and to said davit arm; actuating said jack such that said lower portion of said door panel is lifted from a position below the level of the floor of the structure to a position above the level of the exterior floor; and pivoting said door panel about the davit assembly such that said door panel no longer covers the door opening.",
    "15. The method as defined in claim 14, further comprising: after said pivoting of said door panel such that said door panel no longer covers the door opening, pivoting said door panel such that said door panel is positioned above the recess in the exterior floor and adjacent the door opening; actuating said jack such that said lower portion of said door panel is lowered from a position above the level of the exterior floor of the structure to a position below the level of the interior floor; and moving said door panel such that said door panel at least partially covers the door opening of the structure."
  ],
  "description_excerpt": "This Application claims benefit of U.S. Provisional Application No. 60/146,353, filed Aug. 2, 1999, the entirety of such provisional application being incorporated herein by reference thereto.\n\nThis invention relates generally to an insulated, gas tight door for use in high temperature industrial applications, such as on boilers, economizers, scrubbers, precipitators, bag houses, flue gas ducts, etc., and in particular, to door systems for selective catalytic reactor (SCR) systems. SCR systems use catalyst material held in containers to reduce nitrogen oxides from flue gas, such containers being periodically transported into and out of the SCR structure to replenish the catalyst as necessary.\n\nAccess doors for industrial applications have been patented and, for example, are disclosed in U.S. Pat. Nos. 4,574,973; 4,685,586; and 5,158,043. Such doors were initially developed to eliminate door leakage and cold spots, which could cause inside acid condensation and resulting corrosion, and to provide fast and adequate access for internal maintenance of such equipment. Other types of doors have since been developed to provide other features in different applications for flue gas.\n\nHowever, a need exists for a door which provides a tight seal for a high temperature industrial application, such as for a SCR system, and which facilitates transport of equipment and supplies, such as containers of catalyst, into and out of such industrial application.\n\nIt is, therefore, the principal object of this invention to provide an industrial door system for high temperature applications.",
  "cpc": [
    "B01J 3/03",
    "B01J 8/008",
    "E05D 15/581",
    "E05Y 2900/11",
    "F23J 13/08",
    "F23M 7/00",
    "Y10T 292/223"
  ],
  "ipc": [
    "B01J 3/03",
    "B01J 8/00",
    "F23J 13/08",
    "F23M 7/00"
  ],
  "assignees": [
    "Thermal Engr International"
  ],
  "inventors": [
    "Jon Emsbo"
  ],
  "filing_date": "2000-08-02",
  "publication_date": "2002-07-02",
  "grant_date": "2002-07-02",
  "priority_date": "1999-08-02",
  "application_number": "US-63097500-A",
  "family_id": "26843821",
  "cited_by_count": 96,
  "citations": [
    "US66778A",
    "US342299A",
    "US572475A",
    "US608330A",
    "US1008385A",
    "US1276207A",
    "US1480544A",
    "US2752187A",
    "US3786955A",
    "US3756640A",
    "US4304415A",
    "US4574973A",
    "US4685586A",
    "US5158043A"
  ]
}