Patent · US Expired

Drying of water-containing useful materials or mixtures thereof with superheated steam

US5615492A · kind A · utility

1Cited by

4References

20Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Wilfried Raehse · Goldkronach, DE
Gunter Effey · Monheim, DE
Wilhelm Beck · Goldkronach, DE

Key dates

Filing date	Feb 23, 1996
Grant date	Apr 1, 1997
Priority date	—
Expiry date	Feb 23, 2016

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF26B3/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for drying water-containing materials in a closed-circuit system using a vertical drying tower having inlets located at a lower portion of the tower, the inlets circulating superheated steam in countercurrent to the water-containing materials descending through the vertical drying tower thereby drying the water-containing materials, the improvement being: PA1 (a) providing an auxiliary fluid having a temperature below that of the superheated steam entering into the vertical drying tower; PA1 (b) providing a double jacket having a permeable inner wall wherein the double jacket surrounds the lower portion of the vertical drying tower below the inlets; and PA1 (c) introducing the auxiliary fluid through the permeable inner wall of the double jacket and into the vertical drying tower in a tangential or radial direction relative to the permeable inner wall.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.