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1. WO1992016688 - METHOD OF FIRING BLACK LIQUOR IN RECOVERY BOILERS AND A RECOVERY BOILER FOR FIRING BLACK LIQUOR

Publication Number WO/1992/016688
Publication Date 01.10.1992
International Application No. PCT/SE1992/000134
International Filing Date 04.03.1992
Chapter 2 Demand Filed 08.10.1992
IPC
D21C 11/12 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
11Regeneration of pulp liquors
12Combustion of pulp liquors
F23G 7/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
GCREMATION FURNACES; CONSUMING WASTE OR LOW GRADE FUELS BY COMBUSTION
7Methods or apparatus, e.g. incinerators, specially adapted for combustion of specific waste or low grade fuels, e.g. chemicals
04of waste liquors, e.g. sulfite liquors
CPC
D21C 11/125
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
11Regeneration of pulp liquors ; or effluent waste waters
12Combustion of pulp liquors
125Decomposition of the pulp liquors in reducing atmosphere or in the absence of oxidants, i.e. gasification or pyrolysis
F23G 7/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
23COMBUSTION APPARATUS; COMBUSTION PROCESSES
GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
7Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
04of waste liquors, e.g. sulfite liquors
Y02P 70/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
70Climate change mitigation technologies in the production process for final industrial or consumer products
10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Applicants
  • GÖTAVERKEN ENERGY AB [SE]/[SE] (AllExceptUS)
  • OLAUSSON, Lars [SE]/[SE] (UsOnly)
Inventors
  • OLAUSSON, Lars
Agents
  • GRAUDUMS, Valdis
Priority Data
9100814-418.03.1991SE
Publication Language English (EN)
Filing Language Swedish (SV)
Designated States
Title
(EN) METHOD OF FIRING BLACK LIQUOR IN RECOVERY BOILERS AND A RECOVERY BOILER FOR FIRING BLACK LIQUOR
(FR) PROCEDE DE BRULAGE DE LIQUEUR NOIRE DANS DES CHAUDIERES DE RECUPERATION ET CHAUDIERE DE RECUPERATION UTILISEE POUR LE BRULAGE DE LIQUEUR NOIRE
Abstract
(EN)
The invention relates to a method of firing black liquor in recovery boilers where the intention is to get fumes having a low content of nitrogen oxides (NOx). The invention is characterized in that a part of the combustion air is added as a last portion at a level on a very high level so that a reducing atmosphere will exist in a very great part of the boiler and during a long period of time of at least 3-5 seconds. The invention also includes a recovery boiler for carrying out the above said method.
(FR)
Procédé de brûlage de liqueur noire dans des chaudières de récupération afin d'obtenir des fumées ayant une faible teneur en oxydes d'azote (NOx). L'invention est caractérisée en ce qu'une partie de l'air de combustion est ajoutée comme dernière partie à un niveau donné très élevé de manière qu'une atmosphère de réduction se crée dans une très grande partie de la chaudière et pendant une longue durée d'au moins 3 à 5 secondes. L'invention concerne également une chaudière de récupération utilisée dans la mise en ÷uvre dudit procédé.
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