Catalyst regneration with inverted cooler
AssigneeUop LLC
InventorsMinaz Makhania, Dharmesh Chunilal Panchal, Sakthivelan Maadasamy Durai, Lev Davydov, Richard A. Johnson, II, Sathit A. Kulprathipanja
Life of this patent
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Abstract
Vent gases from a catalyst cooler are directed downstream or outside of the catalyst regenerator to avoid sending air to a location where after burn may occur. Vent gases contain oxygen that when contacted with carbon monoxide in regenerator flue gas can cause after burn to occur at a location which lacks sufficient catalyst density to serve as a heat sink. Locating the cooling media supply in the top of the catalyst cooler enables cooled catalyst to drain from the bottom of the catalyst cooler and fitting more cooler tubes in the catalyst cooler.
Claims20
A catalyst regenerator comprising:
- a shell defining a chamber;
- a catalyst inlet to said chamber for delivering spent catalyst to said chamber;
- a combustion gas distributor in said chamber for distributing air to said spent catalyst in said chamber for combusting coke from said spent catalyst to produce regenerated catalyst and flue gas;
- a flue gas outlet from said chamber;
- a catalyst cooler appended to said chamber for receiving hot catalyst and cooling said hot catalyst;
- and
- a vent from said catalyst cooler having an inlet end and an outlet end;
- and
- a conduit or a vessel connected with said outlet end of said vent and said conduit or vessel is outside of said regenerator.
A process for regenerator a spent catalyst comprising:
- feeding a stream of spent catalyst to a catalyst regenerator and combusting coke from said spent catalyst by contact with oxygen to produce regenerated catalyst and a flue gas;
- exhausting said flue gas from said catalyst regenerator;
- cooling said regenerated catalyst in a catalyst cooler;
- and
- venting a cooler gas stream from said catalyst cooler downstream or outside of said catalyst regenerator.
A catalyst regenerator comprising:
- a shell defining an upper chamber and a lower chamber;
- a catalyst inlet to said upper chamber for delivering spent catalyst to said upper chamber;
- an air distributor for distributing air to said spent catalyst for combusting coke from said spent catalyst to produce regenerated catalyst and flue gas;
- a flue gas outlet from said chamber;
- a catalyst cooler appended to said upper chamber for receiving hot catalyst from said upper chamber and cooling said hot catalyst;
- and
- said catalyst cooler has nested tubes for providing cooling media, said nested tubes comprising inner tubes with inlets above an outlet of the nested tubes.
Dependencies are inferred from the claim text.