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Turndown thermocompressor design for continuous catalyst recovery

a thermocompressor and thermocompressor technology, applied in catalyst regeneration/reactivation, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve problems such as difficulties in maintaining system operation, and achieve the effect of facilitating continuous catalyst regeneration

Inactive Publication Date: 2012-04-19
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermocompressor can utilize combustion air as the motive air, and difficulties in maintaining operation of the system can occur because the net quantity of combustion air in low coke conditions may be insufficient to satisfy the minimum flow requirement for the air heater and / or for cooling the catalyst.

Method used

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  • Turndown thermocompressor design for continuous catalyst recovery
  • Turndown thermocompressor design for continuous catalyst recovery

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Embodiment Construction

[0011]FIG. 1 is a simplified flow diagram of a continuous catalyst regeneration (CCR) system indicated generally at 100. As illustrated, spent catalyst 102 can be removed from a reactor and provided to a catalyst regeneration tower 104. The catalyst regeneration tower 104 can have a plurality of regeneration zones or stages through which the spent catalyst passes when undergoing regeneration. As illustrated, regeneration tower 104 includes a combustion zone 106, a halogenation zone 108, a drying zone 110, and a cooling zone 112. Spent catalyst can enter the regeneration tower 104 through an inlet at the top of the regeneration tower 104. Upon entering the regeneration tower 104, the spent catalyst can undergo the regeneration process by entering combustion zone 106, and then subsequently proceeding through the halogenation zone 108, the drying zone 110, and the cooling zone 112. Regenerated catalyst 114 can be removed from the catalyst regeneration tower 104, and can be returned to ...

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Abstract

Systems and processes for regenerating catalyst are provided herein that include a catalyst regeneration tower having a cooling zone that receives a catalyst cooling stream generated by a cooling gas loop. The systems and processes include a first thermocompressor that utilizes a first motive vapor and a second thermocompressor that utilizes a second motive vapor in order to provide the catalyst cooling stream to the regeneration tower. The second thermocompressor operates in parallel with the first thermocompressor. The first thermocompressor can utilize combustion air as the motive vapor. The second thermocompressor can utilize nitrogen as the motive vapor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Division of copending application Ser. No. 12 / 394,108 filed on Feb. 27, 2009, the contents of which are hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The systems and processes disclosed herein relate to the regeneration of spent catalyst in the art of catalytic conversion of hydrocarbons to useful hydrocarbon products, and more particularly to thermocompressors utilized in a continuous catalyst regeneration (CCR) process.DESCRIPTION OF RELATED ART[0003]The catalysts used in catalytic processes for the conversion of hydrocarbons tend to become deactivated for one or more reasons. In instances where the accumulation of coke deposits causes the deactivation, regenerating of the catalyst to remove coke deposits can restore the activity of the catalyst. Coke is normally removed from catalyst by contact of the coke-containing catalyst at high temperature with an oxygen-containing gas to combu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01J19/00
CPCB01J23/96B01J38/22B01J38/04B01J38/44B01J38/42
Inventor NABOZNY, BRIANSCHLUETER, WILLIAM D.TUSON, KATE
Owner UOP LLC