[12] Patent
[11] Patent No.:GC0009318  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141277
Date of the Decision to Grant the Patent:10/Dec/2018

[21] Application No.:GCC/P/2008/11104

[22] Filing Date:21/6/2008

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Vincent Wai Wong،2- Thomas King Chow،3- John Gebur

[73] Owner: Fluor Technologies Corporation, 3 Polaris Way, CA 92698, Aliso Viejo, USA

[74] Agent: Suleiman I. Al-Ammar Law Office




Int. Cl.: G05D11/139 (2006.01)

[56] Cited Documents:

-US 6,287,535 B1 (SCHENDEL) 11 Septebmer 2001
-US 4,988,494 A (LAGAS et al.) 29 January 1991
-US 3,854,876 A (RANKINE et al.) 17 December 1974
Examiner: Bander M. Al-Thobity

[54] Air Demand Feedback Control Systems and Methods for Sulfur Recovery Units
[57] Abstract: A Claus plant with multiple parallel thermal stages that provide a combined effluent to downstream catalytic stages includes a controller that allows independent and individual control for each of the thermal stages as a function of measured chemical composition of the thermal stage effluents and catalytic stage effluent.
No. of claims: 13     No. of figures: 1


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