Automated sulfur recovery loop

• US 8,226,893 B2
• Filed: 09/11/2008
• Issued: 07/24/2012
• Est. Priority Date: 06/24/2008
• Status: Expired due to Fees

• Current Assignee: Daniel Hage, Frederick J. Siegele, Robert A. Mclauchlan
• Original Assignee: Daniel Hage, Frederick J. Siegele, Robert A. Mclauchlan
• Inventors: McLauchlan, Robert A., Siegele, Frederick J., Hage, Daniel
• Primary Examiner(s): Griffin, Walter D
• Assistant Examiner(s): YOUNG, NATASHA E
• Application Number:
  US12/209,202
• Publication Number:
  US 20090317316A1
• Time in Patent Office: 1,412 Days
• Field of Search: 422/168, 422/169, 422/129, 422/187, 422/600, 422/601, 422/630
• US Class Current: 422/110
• CPC Class Codes: B01D 2251/306 of potassium
• CPC Class Codes: B01D 2257/304 Hydrogen sulfide
• CPC Class Codes: B01D 2257/80 Water
• CPC Class Codes: B01D 53/1425 Regeneration of liquid absorbents
• CPC Class Codes: B01D 53/1468 Removing hydrogen sulfide
• CPC Class Codes: B01D 53/26 Drying gases or vapours
• CPC Class Codes: B01D 53/52 Hydrogen sulfide
• CPC Class Codes: B01D 53/75 Multi-step processes
• CPC Class Codes: B01D 53/77 Liquid phase processes
• CPC Class Codes: B01D 53/78 with gas-liquid contact
• CPC Class Codes: C01B 17/04 from gaseous sulfur compounds including gaseous sulfides
• CPC Class Codes: C01B 17/0404 by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
• CPC Class Codes: G05D 21/02 characterised by the use of electric means
• CPC Class Codes: Y10T 137/7761 Electrically actuated valve

Abstract

A method operable to remove contaminants from a contaminated fluid stream is provided. The process includes receiving the fluid stream containing contaminants. A first portion of the contaminants are removed from the fluid stream with a first scrubbing vessel. A first base solution reacts with the contaminants such that the contaminants enter a contaminant solution. A remaining portion of the contaminants from the fluid stream is then removed with a at least one additional scrubbing vessel, wherein a second base solution reacts with the contaminants such that part of the remaining portion of the contaminants enter a second solution. Water content is then removed from the fluid stream with a desiccating module, wherein the desiccating module outputs a clean fluid stream.

Claims

1. A multistage scrubber comprising:

an inlet operable to receive and meter a fluid feed stream comprising hydrogen sulfide (H₂S);

a first scrubbing stage coupled to the inlet operable to receive the fluid feed stream comprising H₂S;

at least one additional scrubbing stage operable to further process the fluid feed stream comprising H₂S;

a scrubbing solution distribution system coupled to the first scrubbing stage and the at least one additional scrubbing stage, the scrubbing solution distribution system operable to meter alkaline solutions within the scrubber based on;

the chemical composition and concentration of the alkaline solutions,

and the chemical composition and concentration of H₂S within the fluid stream;

an outlet operable to meter and output a substantially H₂S free stream from the scrubbing stages;

a process monitor system operable to monitor physical parameters, fluid chemical compositions and flow rates, and alkaline solution chemical compositions and flow rates at a plurality of points within the multistage scrubber; and

a control system coupled to the process monitor system operable to control fluid flows, alkaline solution flows and physical parameters within the multistage scrubber based on the monitor physical parameters, fluid chemical compositions and flow rates, and alkaline solution chemical compositions.