High efficiency/low pressure catalytic cracking spray nozzle assembly

Patent metadata

Field	Value
Publication number	US-2016199805-A1
Application number	US-201415023472-A
Country	US
Kind code	A1
Filing date	Sep 18, 2014
Priority date	Sep 20, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A gas assisted liquid spray nozzle assembly having a nozzle body that defines a mixing zone, a liquid inlet communicating with the mixing zone from an end, and a pressurized gas inlet communicating with the mixing chamber from an upstream side. The liquid inlet includes a liquid injector extending into the nozzle body having a liquid inlet extension passage and a plurality of discharge orifices adjacent a closed downstream end which define an impingement surface for directing liquid into the mixing zone in transverse relation to a central axis of the mixing zone. The nozzle body and liquid injector define a plurality of concentrating gas discharge passages at respective locations of the injector liquid discharge orifices for causing individual pressurized gas to directly interact with transversely directed liquid into the mixing zone for enhanced atomization and ultimate discharge from a downstream spray tip.

First claim

1 . A gas assisted liquid spray nozzle assembly comprising:
a nozzle body having a mixing zone that communicates with a barrel extension zone downstream of said mixing zone, a liquid inlet from which a pressurized liquid is directed into said mixing zone, a gas inlet from which pressurized gas is directed into said mixing zone, said liquid inlet including an elongated liquid injector extending into the mixing zone along a central axis of the mixing zone, said liquid injector having a liquid inlet extension passageway and a plurality of discharge orifices adjacent a downstream end of said extension passageway for directing liquid from said extension passageway into the mixing zone in transverse relation to the central axis of the mixing zone, said nozzle body having a gas passage communicating with said gas inlet for directing pressurized gas across said liquid injector discharge orifices for atomizing liquid discharging from said liquid injector discharge orifices and directing atomized liquid through said barrel zone, and a spray tip mounted at a downstream end of said barrel zone having a discharge orifice through which atomized liquid directed through said barrel zone is discharged in a predetermined spray pattern.

2 . The gas assisted liquid spray nozzle assembly of claim 1 in which said gas inlet communicates with said mixing zone through a side wall of the nozzle body.

3 . The gas assisted liquid spray nozzle assembly of claim 1 in which said liquid injector has a closed downstream end which defines an internal impingement surface against which liquid directed through said liquid injector extension passageway impinges and is transversely directed outwardly through said liquid injector discharge orifices.

4 . The gas assisted liquid spray nozzle assembly of claim 3 in which said impingement surface is defined by a plurality of said liquid injector discharge orifices extending transversely through the liquid injector adjacent a downstream end thereof.

5 . The gas assisted liquid spray nozzle assembly of claim 1 in which said liquid inlet includes an orifice member that defines a predetermined sized liquid inlet passage, and said liquid injector is a separate tubular member mounted downstream of said orifice member.

6 . The gas assisted liquid spray nozzle assembly of claim 1 in which said nozzle body and liquid injector define a plurality of concentrating gas discharge passages at respective specific locations of each said injector liquid discharge orifice for causing individual pressurized gas stems to directly interact with liquid transversely directed into said mixing zone from the liquid injector discharge orifices.

7 . The gas assisted liquid spray nozzle assembly of claim 6 in which said gas passage is an annular passage, and plurality of concentrating gas discharge passages are defined between said injector and a ring disposed within said nozzle body at a downstream end of said annular gas passage.

8 . The gas assisted liquid spray nozzle assembly of claim 7 in which said ring has a generally rectangular configuration, and said concentrating gas passages are defined between external flats of said injector and internal corners of said ring.

9 . The gas assisted liquid spray nozzle assembly of claim 6 in which said gas passage is an annular passage, said liquid injector being supported within said nozzle body at a downstream end by an annular wall which defines a downstream end of said annular gas passage, and said plurality of concentrating gas passages communicate between said annular gas passage and said mixing zone.

10 . The gas assisted liquid spray nozzle assembly of claim 9 including a ring supported within said annular wall, and said plurality of concentrating gas discharge passages are defined between said ring and a downstream end of said elongated liquid injector.

11 . The gas assisted liquid spray nozzle assembly of claim 10 in which said ring extends upstream of said annular wall.

12 . The gas assisted liquid spray nozzle assembly of claim 10 in which said liquid injector is formed with external flats across said injector liquid discharge orifices, and said concentrating gas discharge passages are defined between said external flats and said ring.

13 . The gas assisted liquid spray nozzle assembly of claim 1 in which said impingement surface is defined by an x-configuration of said injector liquid discharge orifices.

14 . The gas assisted liquid spray nozzle assembly of claim 1 in which said injector liquid discharge orifices define a flat internal impingement surface perpendicular to said central axis of said mixing zone against which pressurized liquid directed through said liquid extension passageway impinges and is transversely directed.

15 . The gas assisted liquid spray nozzle assembly of claim 1 in which said nozzle body is in the form of a one piece hollow cylindrical tubular member.

16 . A gas assisted liquid spray nozzle assembly comprising:
a nozzle body having a mixing zone that communicates with a barrel extension zone downstream of said mixing zone, a liquid inlet from which a pressurized liquid is directed into said mixing zone, a gas inlet from which pressurized gas is directed into said mixing zone, said liquid inlet including an elongated liquid injector extending into the mixing zone along a central axis of the mixing zone, said liquid injector having a liquid inlet extension passageway and a plurality of discharge orifices adjacent a closed downstream end of said extension passageway which defines an internal impingement surface for directing liquid from said extension passageway into the mixing zone in transverse relation to the central axis of the mixing zone, said nozzle body and liquid injector define a plurality of concentrating gas discharge passages connecting with said gas inlet, said concentrating gas passages being at respective specific locations of said injector liquid discharge orifice for causing individual pressurized gas stems to directly interact with liquid transversely directed into said mixing zone from the liquid injector discharge orifices, and a spray tip mounted at a downstream end of said barrel zone having a discharge orifice through which atomized liquid directed through said barrel zone is discharged in a predetermined spray pattern.

17 . The gas assisted liquid spray nozzle assembly of claim 16 in which said gas passage is an annular passage, and said plurality of concentrating gas discharge passages are defined between said injector and a ring disposed within said nozzle body at a downstream end of said annular gas passage.

18 . The gas assisted liquid spray nozzle assembly of claim 16 in which said liquid injector is supported within said nozzle body at its downstream end by a radial wall which defines an upstream gas chamber communicating with said gas inlet, and said plurality of concentrating gas passages communicate between said upstream gas chamber and said mixing zone.

19 . The gas assisted liquid spray nozzle assembly of claim 18 including a ring supported within said annular wall, and said plurality of concentrating gas discharge passages are defined between said ring and a downstream end of said elongated liquid injector.

20 . The gas assisted liquid spray nozzle assembly of claim 19 in which said ring extends upstream of said annular wall.

Assignees

• Spraying Systems Co

Inventors

• Lacroix Mark

Classifications

• B01J8/1818

  Feeding of the fluidising gas (B01J8/44 takes precedence) · CPC title

• B05B7/0466

  with means for deflecting the central liquid flow towards the peripheral gas flow · CPC title

• B01J8/22 Primary

  gas being introduced into the liquid · CPC title

• B01J2208/00902

  Nozzle-type feeding elements · CPC title

• C10G11/18

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