Stripping apparatus and process

Abstract

In an FCC apparatus and process in which swirl arms are used to discharge gas and catalyst from a riser, an anti-swirl plate is disposed in the disengaging vessel to dampen the angular momentum of swirling descending catalyst particles and gases.

1 . An apparatus for separating catalyst particles from a gaseous product stream comprising:
 an elongated riser in which a hydrocarbon feed is contacted with catalyst particles to produce a gaseous product, said riser including a swirl outlet configured to induce the solid catalyst particles and gaseous product stream to swirl in an angular direction to disengage catalyst particles from said gaseous product;   a disengaging vessel in communication with said swirl outlet of said riser, said disengaging vessel including a lower stripper section comprising elongated strips and an outer wall;   a cyclone for further separating said catalyst particles from said gaseous product; and   a plate laterally secured to said outer wall of said disengaging vessel to dampen the angular velocity of said gaseous product and catalyst particles.   
   
   
       2 . The apparatus of  claim 1  further comprising a reactor vessel containing at least a portion of said disengaging vessel; said reactor vessel being in downstream communication with said swirl outlet and containing said cyclone. 
   
   
       3 . The apparatus of  claim 2  wherein said reactor vessel is in upstream communication with a plurality of passages for admitting catalyst particles from said reactor vessel into said disengaging vessel. 
   
   
       4 . The apparatus of  claim 3  wherein at least a portion of said plate is disposed below said passages. 
   
   
       5 . The apparatus of  claim 1  wherein said riser extends through said stripping section. 
   
   
       6 . The apparatus of  claim 5  wherein a second plate is secured to a wall of said riser to dampen the angular velocity of said gaseous product and catalyst particles. 
   
   
       7 . The apparatus of  claim 1  wherein said elongated strips in said stripper section comprise gratings. 
   
   
       8 . The apparatus of  claim 1  wherein said elongated strips in said stripper comprise packing. 
   
   
       9 . An apparatus for separating catalyst particles from a gaseous product stream comprising:
 an elongated riser in which a hydrocarbon feed is contacted with catalyst particles to produce a gaseous product, said riser including a swirl outlet configured to induce the solid catalyst particles and gaseous fluids to swirl in an angular direction to disengage catalyst particles from said gaseous product;   a disengaging vessel containing said swirl outlet of said riser, said disengaging vessel including a stripper section comprising elongated strips and an outer wall comprising plurality of passages above said stripper section;   a reactor vessel surrounding at least a portion of said disengaging vessel, said reactor vessel containing an outlet from said disengaging vessel and a cyclone separator for further separating said catalyst particles from said gaseous product;   a plurality of passages to said disengaging vessel for enabling catalyst particles from said reactor vessel to enter said disengaging vessel through said plurality of passages; and   a plate laterally secured to said outer wall of said disengaging vessel to dampen the angular velocity of said gaseous product and catalyst particles.   
   
   
       10 . The apparatus of  claim 9  wherein said plate is disposed below said passages. 
   
   
       11 . The apparatus of  claim 9  wherein said riser extends through said stripping section. 
   
   
       12 . The apparatus of  claim 11  wherein a second plate is secured to a wall of said riser to dampen the angular velocity of said gaseous product and catalyst particles. 
   
   
       13 . The apparatus of  claim 9  wherein said elongated strips in said stripper section comprise gratings. 
   
   
       14 . The apparatus of  claim 9  wherein said elongated strips in said stripper comprise packing. 
   
   
       15 . A process for separating catalyst particles from a gaseous product stream comprising:
 contacting a hydrocarbon feed with catalyst particles in an elongated riser to produce a gaseous product;   inducing the catalyst particles and gaseous products to swirl in an angular direction upon exiting said riser and entering a disengaging vessel to disengage catalyst particles from said gaseous product;   stripping descending catalyst particles over elongated strips in a stripping section in said disengaging chamber;   separating catalyst particles entrained with ascending product gases from said gases; and   dampening the angular velocity of said gaseous product and catalyst particles in the disengaging vessel by use of a laterally disposed plate.   
   
   
       16 . The process of  claim 15  further including admitting separated catalyst particles through passages into said disengaging vessel; 
   
   
       17 . The process of  claim 15  further including separating said catalyst particles from ascending product gases in a reactor vessel and admitting said separated catalyst particles into said disengaging vessel through passages. 
   
   
       18 . The process of  claim 15  wherein said descending catalyst particles are stripped by an ascending gas.