Solids quench boiler
AssigneeStone & Webster Engineering Corp.
InventorsHerman N. Woebcke, Arju H. Bhojwani, Robert J. Gartside
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Abstract
Apparatus for quenching and cooling the reactor effluent in a thermal regenerative cracking (TRC) system. The quench apparatus includes a section for introducing relatively cool particulate solids into a hot effluent stream to effect initial quenching and a section to further cool the composite of quenched effluent and solids.
Claims6
In a TRC apparatus having a reaction cracking chamber and means for quenching the cracked effluent and wherein the temperature in the cracking zone is between 1300.degree. and 2500.degree. F. and wherein the hydrocarbon feed or the hydrosulfurization residual oil along with the entrained inert solids and the diluent gas are passed through the cracking zone for a residence time of 0.05 to 2 seconds, and then quench cooled, the improvement wherein said means for quenching the effluent comprises:
- a. a quench chamber containing a fluidized bed of particulate solids;
- b. a reactor effluent outlet tube extending from said reaction cracking chamber and extending into the fluidized bed;
- c. a riser tube having an inside diameter larger than the outside diameter of the reactor outlet tube aligned with the reactor outlet tube, which riser tube surrounds the reactor outer tube and depends into the fluidized bed below the top of the reactor outlet tube;
- d. an opening defined by the outside of the reactor outlet tube and the inside of the riser tube which opening provides communication between the fluidized bed and the interior of the riser tube;
- and
- e. an indirect heat exchanger, wherein the riser tube terminates at the entry of the hot side of the indirect heat exchanger.
Dependencies are inferred from the claim text.