Patent ID: 11891581
Assignee: MARATHON PETROLEUM COMPANY LP
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 13:
14. A method of catching spalled coke inside a refinery product processing unit that refines a refinery liquid, the method comprising:
operating a refinery product processing unit having a coke catching device positioned proximate an outlet of the refinery product processing unit, the coke catching device including a bottom section disposed adjacent the outlet, a grid section connected to the bottom section and having a plurality of openings therein, and a top section connected to the grid section, the coke catching device also having a liquid fluid pathway through one or more of the plurality of openings in the grid section, into an inner portion of the grid section, through the bottom section, and into the outlets, thereby to permit at least some spalled coke pieces to pass therebetween;
flowing the refinery liquid having spalled coke therein through at least a portion of the refinery product processing unit and into the coke catching device through the plurality of openings in the grid section thereof;
retaining large coke pieces on an outer side of the grid section, the large coke pieces defined as those coke pieces unable readily to fit through one or more of the plurality of openings of the grid section; and
permitting smaller coke pieces that fit through one or more of the plurality of openings of the grid section to flow with the liquid along the liquid fluid pathway.