Enhancement of claus tail gas treatment by sulfur dioxide-selective membrane technology and sulfur dioxide-selective absorption technology
US10106411B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | Mar 13, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for recovering sulfur from an acid gas feed is provided. The method comprising the steps of mixing the acid gas feed and an absorption process outlet stream to form a combined Claus feed, introducing the combined Claus feed and a sulfur dioxide enriched air feed to a Claus process to produce a Claus outlet gas stream, introducing the Claus outlet gas stream to a thermal oxidizer, treating the thermal oxidizer outlet stream in a gas treatment unit to produce a dehydrated stream, introducing the dehydrated stream to a membrane sweeping unit to produce a sweep membrane residue stream and a sulfur dioxide enriched air feed, introducing a sweep air stream to a permeate side of the membrane sweeping unit, and introducing the sweep membrane residue stream to a sulfur dioxide absorption process to produce the absorption process outlet stream and a stack feed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.