Apparatus for Heating Regeneration Gas
First Claim
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1. An apparatus for processing streams from a fluid catalytic cracking unit comprising:
- a fluid catalytic cracking reactor for 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;
a product outlet for discharging said gaseous product hydrocarbons from said reactor;
a regenerator for combusting coke from said coked catalyst by contact with oxygen;
a flue gas outlet for discharging flue gas from said regenerator;
a product recovery section in downstream communication with said product outlet, said product recovery section for separating said gaseous products into a plurality of product streams including a selected product stream; and
said regenerator being in downstream communication with said product recovery section.
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Accused Products
Abstract
Disclosed is an apparatus for combusting dry gas to heat the air fed to an FCC regenerator to increase its temperature and minimize production of undesirable combustion products. Preferably, the dry gas is a selected FCC product gas. Alternatively or additionally, dry gas from an FCC product stream is separated and delivered to an expander to recover power before combustion.
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Citations
19 Claims
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1. An apparatus for processing streams from a fluid catalytic cracking unit comprising:
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a fluid catalytic cracking reactor for 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; a product outlet for discharging said gaseous product hydrocarbons from said reactor; a regenerator for combusting coke from said coked catalyst by contact with oxygen; a flue gas outlet for discharging flue gas from said regenerator; a product recovery section in downstream communication with said product outlet, said product recovery section for separating said gaseous products into a plurality of product streams including a selected product stream; and said regenerator being in downstream communication with said product recovery section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for processing a flue gas stream from a fluid catalytic cracking unit comprising:
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a fluid catalytic cracking reactor for 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; a product outlet for discharging said gaseous product hydrocarbons from said reactor; a regenerator for combusting coke from said coked catalyst by contact with oxygen; a flue gas outlet for discharging flue gas from said regenerator; a source of dry gas; and a preheater in downstream communication with said source of dry gas and said regenerator being in downstream communication with said preheater. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus for processing streams from a fluid catalytic cracking unit comprising:
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a fluid catalytic cracking reactor for 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; a product outlet for discharging said gaseous product hydrocarbons from said reactor; a regenerator for combusting coke from said coked catalyst by contact with oxygen; a flue gas outlet for discharging flue gas from said regenerator; a product recovery section in downstream communication with said product outlet, said product recovery section for separating said gaseous products into a plurality of product streams including a selected product stream; a preheater in downstream communication with said product recovery section; a blower for blowing an oxygen-containing gas into said regenerator; and said regenerator being in downstream communication with said preheater and said blower. - View Dependent Claims (18, 19)
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Specification