Catalytic cracking system with bio-oil processing

A catalytic cracking system comprising:

• a catalytic cracking reactor;
• a riser communicating upwardly to said catalytic cracking reactor;
• a supply of a liquid hydrocarbon;
• a first feed spray nozzle assembly mounted in and extending through a wall of said riser and having a first spray tip at a downstream end, said first feed spray nozzle assembly having an upstream end coupled to the supply of liquid hydrocarbon and a supply of atomizing gas such that liquid hydrocarbon directed through said first feed spray nozzle assembly is atomized by the atomizing gas and discharged from said first spray tip into riser as a finely atomized liquid hydrocarbon spray;
• a second feed spray nozzle assembly comprising an elongated nozzle body mounted in and extending through the wall of said catalytic cracking riser and having a second spray tip at a downstream end;
• a bio-oil feed tube supported within the elongated nozzle body having an upstream end connected to a supply of a liquid bio-oil for directing liquid bio-oil through bio-oil feed tube to said second spray tip;
• said elongated nozzle body defining an annular atomizing gas passage in surrounding relation to said bio-oil feed tube;
• said annular atomizing gas passage being connected to a supply of atomizing gas for direction through said annular atomizing gas passage for atomizing liquid bio-oil discharging from the liquid feed tube and spray tip into a fine particle liquid bio-oil spray;
• and
• an annular insulating layer between said bio-oil feed tube and said atomizing gas passage for insulating liquid bio-oil directed through said bio-oil feed tube from the heat of atomizing gas directed through said atomizing gas passage.