Patent · US Expired

Method and apparatus for drying radioactive waste water concentrates from evaporators

US4314877A · kind A · utility

11Cited by

2References

20Claims

0Family size

Assignee

Kraftwerk Union Aktiengesellschaft · DE

Inventors

Horst Queiser · Maintal, DE
Othmar Meichsner · Raunheim, DE
Dietmark Erbse · Rodenbach, DE

Key dates

Filing date	Oct 28, 1980
Grant date	Feb 9, 1982
Priority date	—
Expiry date	Oct 28, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S159/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Drying radioactive waste water concentrates from evaporators to produce a dried product of low residual moisture by PA1 (a) preheating a waste water concentrate with a solids content of at most 20% by weight to a temperature of 50.degree.-70.degree. C., PA1 (b) passing the preheated concentrate with a solids content of at most 20% by weight into a two-cylinder drier at the rate of 10 to 20 liters per square meter of usable cylinder surface per hour, PA1 (c) maintaining the cylinder temperature between about 160.degree. to 210.degree. C., PA1 (d) retaining the concentrate in the drier for a residence time of 7 to 18 seconds on the cylinder to produce a dried product of low residual moisture on the cylinder surface, and PA1 (e) discharging the dried product of low residual moisture from the cylinder surface.

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