Process and apparatus for indirect catalyst heating

Patent metadata

Field	Value
Publication number	US-11845072-B2
Application number	US-202117306070-A
Country	US
Kind code	B2
Filing date	May 3, 2021
Priority date	May 3, 2021
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A process and apparatus for indirect heating of catalyst in the regeneration zone is disclosed. A hot flue gas flows within a heating tube and the catalyst to be heated flows outside the heating tube. The hot flue gas is generated by igniting a fuel stream. The hot flue gas is generated directly in the heating tube or is generated in a separate burner outside the heating tube.

First claim

The invention claimed is:

1. A process for heating a catalyst in a regeneration zone comprising a regeneration vessel and a plurality of heating tubes, the process comprises:
passing a catalyst stream from a reactor vessel to a regeneration vessel;
passing a hot flue gas inside a heating tube;
contacting the heating tube with the catalyst stream to heat the catalyst stream and produce a hot regenerated catalyst stream; and
passing the hot regenerated catalyst stream to the reactor vessel.

2. The process of claim 1 further comprising combusting a fuel stream and an oxygen containing gas stream to provide said hot flue gas.

3. The process of claim 2 further comprising combusting said fuel stream and said oxygen containing gas stream in a section of the heating tube contacted by the catalyst stream.

4. The process of claim 3 further comprising combusting said fuel stream and said oxygen containing gas stream inside said section of the heating tube that is inside the regenerator vessel.

5. The process of claim 3 further comprising mixing said fuel stream and said oxygen containing gas stream outside of said regeneration vessel.

6. The process of claim 1 further comprising heating said catalyst stream with radiant heat.

7. The process of claim 1 wherein the regeneration vessel is a fluidized bed.

8. The process of claim 1 further comprising passing the hot regenerated catalyst stream through a stripping section before passing the hot regenerated catalyst stream to the reactor vessel.

9. The process of claim 2 further comprising combusting a fuel stream and an oxygen containing gas stream outside of the heating tube.

Assignees

• Uop Llc

Inventors

• Johnson Ii Richard A
• Senetar John

Classifications

• B01J38/32 Primary

  Indirectly heating or cooling material within regeneration zone or prior to entry into regeneration zone · CPC title

• B01J8/004 Primary

  by means of a nozzle · CPC title

• B01J8/1836

  Heating and cooling the reactor (B01J8/42 takes precedence) · CPC title

• B01J8/24

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

• B01J2208/00132

  Tubes · CPC title