Apparatus and method for solvent recovery from drying process

US12102955B2 · kind B2 · utility

Assignee

• Durr Systems, Inc. · US

Inventors

• Nathan Schubring · Oconto, US
• Andreas Keil · Krefeld, DE
• Jeffrey Quass · Green Bay, US
• Paul Seidl · De Pere, US
• Steven J. Zagar · Luxemburg, US

Key dates

• Filing date: Jul 8, 2020
• Grant date: Oct 1, 2024
• Expiry date: May 18, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2258/0216
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Method and apparatus for condensing a majority of the solvent in a process gas stream at low temperatures, e.g., below the freezing point of water, ca. −5° C. The gas stream exiting the condenser step may be further processed in one or more emission control devices, such as a single or multi-step series of concentrator devices, such as zeolite concentrator devices. One or more emission control operations can be carried out downstream of the single or multi-step concentrators. The aforementioned condensing process enables the one or more concentrators to operate in a favorable temperature range for removal of 99% or more of VOC, thereby meeting or exceeding strict environmental regulations.