Thin-film evaporator made of a corrosion resistant material

US5419810A · kind A · utility

Assignee

• BUSS AG · CH

Inventors

• Rolf Van Der Piepen · Bochum, DE
• Lothar Weimann · Steffenberg, DE

Key dates

• Filing date: Jan 4, 1993
• Grant date: May 30, 1995
• Expiry date: Jan 4, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S165/905
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a thin-film evaporator equipped with a heatable tubular evaporator body in whose product charged interior a driven rotor is disposed which is equipped with essentially radially oriented vanes. The invention is formed from an evaporator body of at least one thick-wall graphite tube with a plurality of essentially axially extending bores disposed in the tube walls, each one of the bores open at the tube ends into an annular channel which is in communication with a connecting pipe stub for a heating medium. Since the treatment of corrosive media, for example acids charged with solids, places high demands on corrosion resistance of the materials employed and additionally high demands for accuracy of the work, it is proposed to form the evaporator body (1) of at least one thick-wall graphite tube (2); to dispose a plurality of essentially axially extending bores (14) in the tube walls; and to have each one of the bores (14) open at the tube ends into an annular channel (15, 16) which is in communication with a connecting pipe stub (6, 9) for a heating medium.