US 2003/0194361 A1 · Feeding device and process and feeding system which utilise the feeding device

Abstract

Feeding device for feeding burned lime to a reaction vessel for causticizing a soda liquor to caustic soda. The feeding device, in its upper part, comprises an inlet for a slurry of the burned lime and the soda liquor for formation of said slurry inside said feeding device. The system further comprises a tall and slender feed vessel having a lower part having an outlet defined therein for the slurry. The outlet, via a pump, is operatively connected to the reaction vessel. The process and the feeding system utilize the feeding device, in which process the slurry is created of the burned lime and a first part of the soda liquor, a second part being preheated before addition to the slurry, whereafter slaking and causticizing reactions are completed under elevated temperature and pressure.

Claims17

Dependent claims

A process for reacting a soda liquor with a burned lime for production of caustic soda, comprising:

(a) forming a slurry of the burned lime and a first part of the soda liquor and allowing the slurry a retention time of 10-150 seconds in a feed vessel;
(b) preheating a second part of the soda liquor;
(c) combining the slurry from step (a) and the preheated second part of the soda liquor of step (b);
and
(d) maintaining the combined slurry and the soda liquor at an elevated pressure and at an elevated temperature for completion of the reaction between the burned lime and the soda liquor to yield a caustic soda and a lime mud.

2 more elements

Dependencies are inferred from the claim text.

Feeding device and process and feeding system which utilise the feeding device

Life of this patent

Feeding device and process and feeding system which utilise the feeding device

Life of this patent

Abstract

Claims17