D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/12 (2006.01) D21C 11/06 (2006.01) F23G 7/04 (2006.01)
Patent
CA 2112563
Abstract The present invention relates to a process for the extraction of chemicals and energy from cellulose spent liquors, preferably black liquor obtained in the sulphate cellulose process, wherein the spent liquor is introduced into a gasification reactor (1) for pyrolysis and partial incineration, wherein an energy- rich gas is formed containing particles of inorganic chemical melt, the said gas mixture is conveyed out of the reactor (1) and concomitantly cooled by injection of a finely-divided cooling medium, preferably water, in connection with the departure from the reactor (1), the said mixture of gas and non-adhesive chemical particles is led from a cooling chamber (2) arranged in connection with the gasification reactor (1) to a separating arrangement (3), preferably a cyclone, where the non- adhesive chemical particles are separated from the gas, the gas stream, essentially cleaned of chemical particles, is taken out via an upper connection on the separating arrangement (3) while the chemical particles are taken out via a lower connection on the separating arrangement (3), wherein the melt particles leaving the reactor in the gas mixture are cooled to a temperature where they have at least partially solidified and been converted to solid phase, so that the particles included in the gas mixture are non-adhesive, and that a subsequent heat exchange of the separated gas is carried out from an essentially preserved temperature level.
Kignell Jan-Erik
Chemrec Aktiebolag
Marks & Clerk
LandOfFree
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