Heavy hydrocarbon feed atomization
AssigneesMobil Oil Corporation, The M.W. Kellogg Company
InventorsSuisheng M. Dou, Allen R. Hansen, Steven C. Heidenreich, William J. Hillier, Phillip K. Niccum, Maury I. Schlossman
Life of this patent
Estimating the term…
Abstract
A nozzle, and FCC process using the nozzle for atomizing heavy feed to a riser reactor, are disclosed. A liquid feed stream is atomized by radial out-to-in impingement of atomizing vapor, discharged onto an impingement plug in an annular expansion region, then sprayed through an outlet. Baffles at the expansion region outlet, and an orifice outlet improve feed atomization and feed/FCC catalyst contact in a riser reactor. The nozzle may be used to distribute liquid over other reactor beds, or to add liquid to distillation columns.
Claims15
An atomizing nozzle comprising:
- an initial atomizer having a generally cylindrical inner surface having an axis, a diameter and a cross sectional area, a first end, a second end, a borehole extending from the first end to the second end, a liquid feed inlet connected with the first end, a plurality of radially distributed atomizing gas inlets drilled through said initial atomizer and within one diameter of the second end;
- an impingement atomizer having an axis which is axially aligned with the axis of said initial atomizer, a first end, a second end, a generally cylindrical plug having a diameter, a plug first end near said second end of said initial atomizer and a plug second end, said plug in axial alignment with said initial atomizer and wherein said plug first end is in open fluid communication with said second end of said initial atomizer;
- an annular expansion region consisting of a truncated cone having an angle of less than 20.degree., a first end near the apex of said cone connected with said second end of said initial atomizer and a second end connected with a cylindrical nozzle barrel, said second end of said annular expansion region enveloping said impingement atomizer;
- said cylindrical nozzle barrel having an axis and axially aligned with said initial atomizer, said nozzle barrel having a cross sectional area at least twice as large as the cross sectional area of said initial atomizer, a first end connected with the second end of said annular expansion region, and a second end connected with an orifice outlet.
An atomizing nozzle comprising:
- an initial atomizer having a generally cylindrical inner surface having an axis, a diameter and a cross sectional area, a first end, a second end, a borehole extending from the first end to the second end, a liquid feed inlet connective with the first end, a plurality of radially distributed atomizing gas inlets drilled through said cylinder and within one diameter of the second end;
- an impingement atomizer having an axis which is axially aligned with the axis of said initial atomizer, a first end, a second end, a generally cylindrical plug having a diameter, a plug first end near said second end of said initial atomizer and a plug second end, said plug in axial alignment with said initial atomizer and wherein said plug first end is in open fluid communication with said second end of said initial atomizer;
- an annular expansion region consisting of a truncated cone having an angle of less than 20.degree., a first end near the apex of said cone connective with said second end of said initial atomizer and a second end connective with a cylindrical nozzle barrel, said second end of said annular expansion region enveloping said impingement atomizer;
- said cylindrical nozzle barrel having an axis axially aligned with said initial atomizer, a diameter at least twice as large as the diameter of said initial atomizer, a first end connective with the second end of said annular expansion region, and a second end connective with an orifice outlet.
Dependencies are inferred from the claim text.