US 4,223,843 A · Air distribution apparatus

Abstract

An air distribution apparatus for delivering an oxygen-carrying gas such as air to a zone of spent catalyst in a regenerator for the purpose of combusting air with the spent catalyst in order to rejuvenate the catalyst. A header support assembly is adapted for mounting in a regenerator which receives the spent catalyst. A hollow header ring is mounted onto the header support assembly and includes a plurality of openings each having a nozzle mounted therein. Air is supplied to the header support assembly and thus to the hollow header ring at a pressure sufficiently high to effect a maximum desired pressure differential between header pressure and pressure in the zone of spent catalyst to cause maximum uniform air distribution. The nozzles mounted in the openings in the header ring decrease air velocity between nozzle inlet and nozzle outlet in order to provide for maximum uniform air distribution without destruction of the catalyst.

Claims11

Dependent claims

A method for forming an air distribution apparatus for a regenerator for providing a maximum air velocity that will not damage spent catalyst therein comprising,

(a) mounting a header ring means on a cylindrical housing means in the regenerator,
(b) attaching high pressure air supply means to the cylindrical housing means for supplying the header ring means,
(c) forming a plurality of nozzles in the header ring means, and in the cylindrical housing means with each nozzle formed with a diverging bore for ejecting high pressure air from the header ring means and cylindrical housing means into the spent catalyst, and
(d) forming the diverging bore of each of the nozzles at a half angle of less than 7.degree. for providing a maximum air velocity without destruction of the spent catalyst.

1 more element

An improved air distribution apparatus for delivering an oxygen-carrying gas such as air at high pressure to a zone of spent catalyst in a regenerator of a fluid catalytic cracking process with maximum desired pressure differential and at a velocity below a level which would damage the catalyst, comprising,

(a) a header support assembly adapted for mounting in a regenerator of a fluid catalytic cracking process, said header support assembly supporting a hollow header ring having a plurality of openings therein,
(b) said header support assembly comprising a first cylindrical housing means for supporting said hollow header ring,
(c) an air supply line attached to said header support assembly and air supply means for supplying air through said air supply line to said hollow header ring at a pressure which causes a maximum effective pressure differential between said ring and in said regenerator,
(d) a plurality of nozzles and mount means mounting said nozzles in said openings in said header ring, each of said nozzles having a bore therethrough which forms a nozzle inlet which initially receives air from said header ring and a nozzle exit for directing air outwardly into such spent catalyst zone, and
(e) each of said nozzle bores diverging from said nozzle inlet to said nozzle outlet at a half angle of less than 7.degree. which decreases the velocity of said air from said nozzle inlet to said nozzle exit to a level which will not substantially damage the catalyst.

2 more elements

Dependencies are inferred from the claim text.

Air distribution apparatus

Life of this patent

Air distribution apparatus

Life of this patent

Abstract

Claims11