Patent · US Expired

Method and arrangement for changing the temperature of fluids which form incrustations

US4055218A · kind A · utility

0Cited by

3References

10Claims

0Family size

Assignee

Vereinigte Aluminum - Werke Aktiengesellschaft · DE

Inventors

Fritz Kampf · Grafenau, DE
Hans-Georg Kaltenberg · Grafenau, DE

Key dates

Filing date	Aug 23, 1974
Grant date	Oct 25, 1977
Priority date	—
Expiry date	Aug 23, 1994

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S159/13
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A fluid medium is conveyed along a conduit. During its passage through the conduit, the fluid medium undergoes temperature change. The change in temperature of the fluid medium is performed in a step-wise manner by indirect heat-exchange with a fluid flowing countercurrent to the fluid medium, that is, by means of a plurality of heat-exchangers arranged along the conduit. The fluid medium forms incrustations and the rate at which incrustations form is different at different temperatures. This is taken into account by providing for the ratio between the lengths of any two heat-exchangers to approximate the ratio between the rates at which incrustations form at the temperatures of the respective heat-exchangers. Of particular interest is the extraction of bauxite with sodium aluminate lye.

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