Patent · US Expired

Process and apparatus for drying a slurry

US6006440A · kind A · utility

19Cited by

13References

25Claims

0Family size

Assignee

Andritz-Payrntverwaltungs-gesellschaft M.B.H. · AT

Inventors

Wolfgang Wiesenhofer · Graz, AT
Giselher Stummer · Kumberg, AT

Key dates

Filing date	Nov 19, 1997
Grant date	Dec 28, 1999
Priority date	—
Expiry date	Nov 19, 2017

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF26B25/002
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention is directed to a process and apparatus for drying a slurry, particularly a sludge, such as sewage sludge, in which a sludge mixture of recycled dried sludge and wet sludge is fed to a drier. The quantity of wet sludge or recycled dried sludge supplied to the drier is controlled based upon drier inlet temperature. In this way, the evaporation rate of the drier is kept substantially constant.

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