Pulsed crystallizer with strips of reduced heat exchange

US4162617A · kind A · utility

Inventors

• Paul Schmidt · Allentown, US
• Peter Walzel · Essen, DE

Key dates

• Filing date: Jul 14, 1977
• Grant date: Jul 31, 1979
• Expiry date: Jul 14, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D9/005
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Selected chemical species in fluid media such as solutions, mixtures of liquids, and suspensions are crystallized by indirect cooling of the fluid media. Crystals are prevented from sticking to the heat exchange surface by pulsating the fluid with a component of pulsation parallel to the heat exchange surface. The crystals can then be separated from the residual fluid.