Process for recovering power from FCC product
AssigneeUop LLC
InventorJohn A. Petri
Life of this patent
Estimating the term…
Abstract
Disclosed is a process for recovery power from an FCC product. Gaseous hydrocarbon product from an FCC reactor is heat exchanged with a heat exchange media which is delivered to an expander to generate power. Cycle oil from product fractionation may be added to the gaseous FCC product to wash away coke precursors.
Claims18
A process for recovering heat from a fluid catalytic cracking unit comprising:
- contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbons to gaseous product hydrocarbons having lower molecular weight and deposit coke on the catalyst to provide coked catalyst;
- separating said coked catalyst from said gaseous product hydrocarbons;
- indirectly heat exchanging said gaseous product hydrocarbons with a heat exchange media to provide superheated heat exchange media and provide a hot product hydrocarbon stream;
- directing said superheated heat exchange media to an expander;
- recovering power from said superheated heat exchange media in said expander;
- and
- indirectly heat exchanging said hot product hydrocarbon stream from said indirect heat exchanging step with heat exchange media to provide an intermediately heated heat exchange media and a warm product hydrocarbon stream.
A process for recovering heat from a fluid catalytic cracking unit comprising:
- contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbons to gaseous product hydrocarbons having lower molecular weight and deposit coke on the catalyst to provide coked catalyst;
- separating said coked catalyst from said gaseous product hydrocarbons;
- indirectly heat exchanging said gaseous product hydrocarbons with a heat exchange media to provide superheated heat exchange media and provide a hot product hydrocarbon stream;
- directing said superheated heat exchange media to an expander;
- recovering power from said superheated heat exchange media in said expander;
- indirectly heat exchanging said hot product hydrocarbon stream from said indirect heat exchanging step with heat exchange media to provide an intermediately heated heat exchange media and a warm product hydrocarbon stream;
- separating said warm product hydrocarbon stream to obtain a plurality of product streams;
- and
- feeding at least a portion of one of said product streams along with said gaseous product hydrocarbons to be indirectly heat exchanged with said heat exchange media.
The process of claim 15 further comprising directing an overhead stream from said heat exchange media drum to supply the heat exchange media of claim 16.
A process for recovering heat from a fluid catalytic cracking unit comprising:
- contacting cracking catalyst with a hydrocarbon feed stream to crack the hydrocarbons to gaseous product hydrocarbons having lower molecular weight and deposit coke on the catalyst to provide coked catalyst;
- separating said coked catalyst from said gaseous product hydrocarbons;
- indirectly heat exchanging said gaseous product hydrocarbons with a heat exchange media to provide superheated heat exchange media and provide a hot product hydrocarbon stream;
- directing said superheated heat exchange media to an expander;
- recovering power from said superheated heat exchange media in said expander;
- adding oxygen to said coked catalyst;
- combusting coke on said coked catalyst with oxygen to regenerate said catalyst and provide flue gas;
- separating said catalyst from said flue gas;
- and
- indirectly heat exchanging said hot product hydrocarbon stream from said indirect heat exchanging step with heat exchange media to provide an intermediately heated heat exchange media and a warm product hydrocarbon stream.
Dependencies are inferred from the claim text.