Method of temperature control in fluid catalyst regenerator units

Claim 1

A METHOD FOR REMOVING HEAT FROM A BODY OF FLUIDIZED SOLID CATALYST PARTICLES UNDERGOING REGENERATION IN A REGENERATOR OF A FLUID CATALYST CONVERSION UNIT WHEREIN EXCESS HEAT IS LIBERATED BY INCOMPLETE COMBUSTION OF CARBONACEOUS DEPOSITS FROM THE CATALYST SURFACE WITH AN OXYGEN-CONTAINING GAS AND FOR RECOVERING WASTE HEAT FROM THE REGENERATOR WASTE COMBUSTION GASES WHICH COMPRISES DELIVERING WASTE COMBUSTION GASES FROM THE REGENERATOR TO A FURNACE, BURNING THE CARBON MONOXIDE IN THE WASTE COMBUSTION GASES AT ELEVATED TEMPERATURE, GENERATING STEAM BY INDIRECT HEAT EXCHANGE BETWEEN THE RESULTING COMBUSTION GASES AND WATER, AND PASSING THE STEAM SO GENERATED GASES AND WATER, AND PASSING THE STEAM SO FLUIDIZED CATALYST PARTICLES UNDERGOING REGENERATION IN THE REGENERATOR.

Claim 2

A METHOD FOR REMOVING HEAT FROM A BODY OF FLUIDIZED SOLID CATALYST PARTICLES UNDERGOING REGENERATION IN A REGENERATOR OF A FLUID CATALYST CONVERSION UNIT WHEREIN EXCESS HEAT IS LIBERATED BY INCOMPLETE COMBUSTION OF CARBONACEOUS DEPOSITS FROM THE CATALYST SURFACE WITH AN OXYGEN-CONTAINING GAS AND FOR RECOVERING WASTE HEAT FROM THE REGENERATOR WASTE COMBUSTION GASES WHICH COMPRISES DELIVERING WASTE COMBUSTION GASES FROM THE REGENERATOR TO A FURNACE, BURNING THE CARBON MONOXIDE IN THE WASTE COMBUSTION GASES AT ELEVATED TEMPERATURE, GENERATING STEAM BY INDIRECT HEAT EXCHANGE BETWEEN THE RESULTING COMBUSTION GASES AND WATER, AND PASSING THE STEAM SO GENERATED GASES AND WATER, AND PASSING THE STEAM SO FLUIDIZED CATALYST PARTICLES UNDERGOING REGENERATION IN THE REGENERATOR.

Claim 3

A METHOD FOR REMOVING HEAT FROM A BODY OF FLUIDIZED SOLID CATALYST PARTICLES UNDERGOING REGENERATION IN A REGENERATOR OF A FLUID CATALYST CONVERSION UNIT WHEREIN EXCESS HEAT IS LIBERATED BY INCOMPLETE COMBUSTION OF CARBONACEOUS DEPOSITS FROM THE CATALYST SURFACE WITH AN OXYGEN-CONTAINING GAS AND FOR RECOVERING WASTE HEAT FROM THE REGENERATOR WASTE COMBUSTION GASES WHICH COMPRISES DELIVERING WASTE COMBUSTION GASES FROM THE REGENERATOR TO A FURNACE, BURNING THE CARBON MONOXIDE IN THE WASTE COMBUSTION GASES AT ELEVATED TEMPERATURE, GENERATING SATURATED STEAM BY INDIRECT HEAT EXCHANGE BETWEEN THE RESULTING COMBUSTION GASES AND WATER, PASSING THE STEAM SO GENERATED THROUGH A TUBULAR COIL LOCATED IN THE BED OF FLUIDIZED CATALYST PARTICLES UNDERGOING REGNERATION IN THE REGENERATOR, BY-PASSING A PORTION OF THE SATURATED STEAM AROUND THE COIL IN AN AMOUNT FIXED BY THE TEMPERATURE PREVAILING WITHIN THE REGENERATOR CATALYST BED AND VARYING AS AN INVERSE FUNCTION THEREOF WHEREBY THE RATE OF HEAT REMOVAL FROM THE CATALYST BED IS CONTROLLED BY THE AMOUNT OF BY-PASS STEAM AND CONTROLLING THE TEMPERATURE OF THE SUPERHEATED STEAM DISCHARGED FROM THE COIL BY INJECTING A COOLING SPRAY INTO DIRECT CONTACT WITH STEAM DISCHARGING FROM THE COIL IN AN AMOUNT CONTROLLED BY THE FINAL DISCHARGE STEAM TEMPERATURE.

Claim 4

A METHOD FOR REMOVING HEAT FROM A BODY OF FLUIDIZED SOLID CATALYST PARTICLES UNDERGOING REGENERATION IN A REGENERATOR OF A FLUID CATALYST CONVERSION UNIT WHEREIN EXCESS HEAT IS LIBERATED BY INCOMPLETE COMBUSTION OF CARBONACEOUS DEPOSITS FROM THE CATALYST SURFACE WITH AN OXYGEN-CONTAINING GAS AND FOR RECOVERING WASTE HEAT FROM THE REGENERATOR WASTE COMBUSTION GASES WHICH COMPRISES DELIVERING WASTE COMBUSTION GASES FROM THE REGENERATOR TO A FURNACE, BURNING THE CARBON MONOXIDE IN THE WASTE COMBUSTION GASES AT ELEVATED TEMPERATURE, GENERATING SATURATED STEAM BY INDIRECT HEAT EXCHANGE BETWEEN THE RESULTING COMBUSTION GASES AND WATER, PASSING THE STEAM SO GENERATED THROUGH A TUBULAR COIL LOCATED IN THE BED OF FLUIDIZED CATALYST PARTICLES UNDERGOING REGNERATION IN THE REGENERATOR, BY-PASSING A PORTION OF THE SATURATED STEAM AROUND THE COIL IN AN AMOUNT FIXED BY THE TEMPERATURE PREVAILING WITHIN THE REGENERATOR CATALYST BED AND VARYING AS AN INVERSE FUNCTION THEREOF WHEREBY THE RATE OF HEAT REMOVAL FROM THE CATALYST BED IS CONTROLLED BY THE AMOUNT OF BY-PASS STEAM AND CONTROLLING THE TEMPERATURE OF THE SUPERHEATED STEAM DISCHARGED FROM THE COIL BY INJECTING A COOLING SPRAY INTO DIRECT CONTACT WITH STEAM DISCHARGING FROM THE COIL IN AN AMOUNT CONTROLLED BY THE FINAL DISCHARGE STEAM TEMPERATURE.