FCC Feed Injector with Improved Atomization

Patent metadata

Field	Value
Publication number	US-2016354748-A1
Application number	US-201615171661-A
Country	US
Kind code	A1
Filing date	Jun 2, 2016
Priority date	Jun 3, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

The present invention discloses a method and an apparatus for mixing and atomizing a hydrocarbon stream using a diluent/dispersion stream. In one embodiment, the apparatus comprises: an inner conduit and an outer conduit concentric to each other to define an annular space, said outer conduit having an inlet for receiving the hydrocarbon stream and an outlet for dispensing a mixture comprising the hydrocarbon and the dispersion/diluent streams; a diluent/dispersion steam distributor being in connection with the inner conduit and defining a central orifice and a first set of orifices, said first set of orifices adapted to direct a first portion of the dispersion/diluent stream into the annular space and said central orifice adapted to direct a second portion of the diluent/dispersion stream into the inner conduit; at least one contraction member and expansion member, said contraction member located downstream of the first set of orifices and said expansion member located downstream said expansion member; the inner conduit located downstream of said expansion member comprises a second set of orifices, said second set of orifices disposed on a periphery of the inner conduit and adapted to dispense a second portion of the dispersion/diluent stream into the annular space.

First claim

We claim:

1 . An apparatus for mixing and atomizing a hydrocarbon stream using a diluent/dispersion stream, said apparatus comprising:
an inner conduit and an outer conduit concentric to each other to define an annular space, said outer conduit having an inlet for receiving the hydrocarbon stream and an outlet for dispensing a mixture comprising the hydrocarbon and the dispersion/diluent streams; a diluent/dispersion stream distributor being in connection with the inner conduit and defining a central orifice and a first set of orifices, said first set of orifices adapted to direct a first portion of the dispersion/diluent stream into the annular space and said central orifice adapted to direct a second portion of the diluent/dispersion stream into the inner conduit; at least one contraction member and expansion member, said contraction member located downstream of the first set of orifices and said expansion member located downstream said expansion member; and the inner conduit located downstream of said expansion member comprises a second set of orifices, said second set of orifices disposed on a periphery of the inner conduit and adapted to dispense a second portion of the dispersion/diluent stream into the annular space.

2 . The apparatus as claimed in claim 1 , wherein the first set of orifices direct the first portion of the dispersion/diluent stream in a direction substantially parallel to a longitudinal axis of the apparatus.

3 . The apparatus as claimed in claim 1 , wherein the second set of orifices direct the second portion of the dispersion/diluent stream at an angle in the range of 30 to 120 degrees with respect to a longitudinal axis of the apparatus.

4 . The apparatus as claimed in claim 1 , wherein a length of the contraction and expansion member is at least half of a length of the inner conduit.

5 . The apparatus as claimed in claim 1 , wherein said at least one contraction and expansion member is located on one or more:
inner surface of the outer conduit; and outer surface of the inner conduit.

6 . The apparatus as claimed in claim 1 , wherein the contraction and expansion member has a length to diameter ratio of at least 3.

7 . The apparatus as claimed in claim 1 , wherein the inner conduit includes an upper portion and a lower portion, said lower portion being downstream of said upper portion and having a diameter greater than that of the upper portion.

8 . The apparatus as claimed in claim 7 , wherein the lower portion of the inner conduit comprises the second set of orifices.

9 . The apparatus as claimed in claim 1 , further comprising a flow diverter located downstream the inner conduit, said flow diverter adapted for dividing the mixture comprising the hydrocarbon and the dispersion/diluent streams into a plurality of streams.

10 . The apparatus as claimed in claim 9 , wherein the flow diverter comprises a plurality of triangular diverters, said plurality of triangular diverters adapted to meet at a point on a longitudinal axis of the apparatus to form a circular cone with its vertex in an upstream direction.

11 . A method for mixing and atomizing a hydrocarbon stream using a diluent/dispersion stream, said method comprising:
providing an apparatus comprising:
an inner conduit and an outer conduit concentric to each other to define an annular space, said outer conduit having an inlet for receiving the hydrocarbon stream and an outlet for dispensing a mixture comprising the hydrocarbon and the dispersion/diluent streams;
a diluent/dispersion stream distributor being in connection with the inner conduit and defining a central orifice and a first set of orifices, said first set of orifices adapted to direct a first portion of the dispersion/diluent stream into the annular space and said central orifice adapted to direct a second portion of the diluent/dispersion stream into the inner conduit;
at least one contraction member located downstream of the first set of orifices;
at least one expansion member located downstream of said contraction member; and
the inner conduit located downstream of said expansion member comprises a second set of orifices, said second set of orifices disposed on a periphery of the inner conduit and adapted to dispense a second portion of the dispersion/diluent stream into the annular space;
introducing the diluent/dispersion stream into the inlet of the inner conduit; and introducing the hydrocarbon stream into the inlet of the outer conduit.

12 . The method as claimed in claim 11 , wherein the first portion of the diluent/dispersion stream is 50-95 percent of the diluent/dispersion stream.

Assignees

• Indian Oil Corp Ltd

Inventors

• De Bidyut
• Khan Shoeb Hussain
• Kumaran Satheesh Vetterkunnel
• Bhattacharyya Debasis
• Kumar Brijesh

Classifications

• C10G11/18

  according to the "fluidised-bed" technique · CPC title

• B01J8/1827

  the fluidising gas being a reactant · CPC title

• B05B7/0483

  with gas and liquid jets intersecting in the mixing chamber · CPC title

• B05B7/0433

  with one inner conduit of gas surrounded by an external conduit of liquid upstream the mixing chamber · CPC title

• B01J8/24 Primary

  according to "fluidised-bed" technique (B01J8/20 takes precedence) · CPC title