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US 4,378,744 AGranted
Fluidized bed combustor and removable windbox and tube assembly therefor
AssigneeCurtiss-Wright Corporation
InventorsAngelo DeFeo, William Hosek
Life of this patent
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AssigneeCurtiss-Wright Corporation
InventorsAngelo DeFeo, William Hosek
Estimating the term…
A fluidized bed combustor comprises a housing having a chamber therein with a top having a discharge for the gases which are generated in the chamber and a bottom with a discharge for heated fluid. An assembly is arranged in the lower portion of the chamber and the assembly includes a lower plate which is mounted on a support flange of the housing so that it is spaced from the bottom of the chamber and defines a fluid plenum between it and the bottom of the chamber for the discharge of heated fluid. The assembly includes a heat exchanger inlet plenum having tubes therethrough for the passage of fluidizer air and a windbox above the heat exchanger plenum which has a distributor plate top wall. A portion of the chamber above the top wall defines a fluidized bed.
A tuyere for directing air into a fluidized bed of a fluidized bed reactor comprising a hollow socket member having an exterior threaded portion for threading it to a support by an amount to position it at a predetermined angular position and having an air inlet passage therethrough and an interior with a curved receiving surface, an indicating member connected to said hollow socket member and projecting outwardly from said curved receiving surface, a tubular sleeve body engaged in said hollow socket member and having a side wall with a ledge portion and a sleeve body curved surface below said ledge portion engaged on said curved receiving surface and having a recess into which said indicating member extends to fix said tubular sleeve body angularly in respect to said hollow socket member, the interior of said hollow socket member being spaced outwardly of said tubular sleeve body and having a coarse threaded portion, said tubular sleeve body having an interior passage therethrough aligned with said air inlet passage and having a plurality of radially extending discharge passages adjacent the upper end thereof extending radially outwardly therefrom at a plurality of angularly spaced locations, the angle of disposition of each of said passages being determined by the position of said tubular sleeve body relative to said hollow socket member as determined by said indicating member, and a retaining sleeve disposed in said hollow socket member between said hollow socket member and said tubular sleeve body and being threaded to said hollow socket member and engaged on said ledge to urge said curved surface of said tubular sleeve body into engagement with the curved surface of said hollow socket member.
A method of positioning a tuyere having a tubular sleeve body containing a passage for fluidizing air, one or more radially extending discharge passages oriented at selected angles which is mounted in a hollow receiving socket member which is adapted to be attached to a distributor plate of a combustor having a fluidized bed which comprises threading the hollow socket member to the distributor plate so that it is positioned at a desired position, connecting a dowel to the socket member so that it projects outwardly from the interior of the socket member at this adjusted position, securing the socket member to the distributor plate at the adjusted position, inserting the sleeve body into the socket member so that a recess of the sleeve body engages with the dowel to lock it in the adjusted position and applying a threaded retaining sleeve in a space between the socket member and the tubular sleeve body by threading the retaining sleeve into the socket member causing it to bear against the tubular sleeve body to press the sleeve body into a desired position in engagement with the dowel.
Dependencies are inferred from the claim text.