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US 4,398,923 AGranted
Vessel access port
AssigneeBS&B Engineering Company Inc.
InventorNorman J. Hannigan
Life of this patent
Estimating the term…
Abstract
An improved access port structure for a vessel, such as a coal gassification furnace, in which a closure member is mounted for movement, on the vessel to open or close an opening, a means of providing a steam vortex flowing into the opening to prevent the escape of gases from the vessel, and an interconnection to the steam supply to assure that the vortex is operating prior to the opening of the closure member.
Claims9
An access port structure for a vessel having an opening therethrough comprising,
- means secured to said vessel surrounding the vessel opening and defining a seat,
- a closure plate,
- means supporting said closure plate for movemement into engagement with said seat and away from said seat,
- means for creating a vortex extending into said vessel through said opening,
- means supplying steam to said vortex creating means, valve means in said supply means, and
- means interconnecting said closure plate and said valve means assuring opening of valve means prior to opening said closure plate.
3 more elements
An access port structure for a vessel opening comprising,
- a ring secured around the vessel opening and having a conical deflector therein with an opening between the ring and the deflector, and a seat surrounding the opening through the ring,
- a shaft supported for axial movement,
- a closure member,
- an arm supporting the closure member and pivotally mounted on said shaft so that the closure member moves to and from engagement with said seat,
- a steam valve supported from said ring and controlling flow of steam through said opening to create an inwardly flowing vortex,
- means on said shaft preventing pivoting of said arm to move the closure member off said seat except when said shaft is in one of its extreme axial positions, and
- means for opening said steam valve and for moving said shaft to the position allowing opening of said closure member whereby said closure member only moves off said seat after a steam vortex is created.
4 more elements
A coal gassifier vessel comprising,
- a vessel having side walls, a bottom, a grate and a top, means for feeding coal to the vessel,
- means for discharging ashes from the vessel bottom,
- means for delivering an air blast into the vessel,
- means for discharging gas produced from the vessel,
- said vessel top having an opening therethrough,
- a seat,
- means for securing said seat to said top around said opening,
- a closure member,
- means for mounting said closure member into and from engagement closing said seat,
- means for creating a steam vortex flowing inward in said vessel opening,
- valve means controlling flow of steam to said vortex means, and
- means preventing opening movement of said closure member until said valve means is open to create said steam vortex.
9 more elements
Dependencies are inferred from the claim text.