US 12,000,087 B2
Combustion of streams derived from hot water extraction of wood material
Jonathan Lalonde, Témiscouata-sur-le-Lac (CA); Pierre Hudon, Shawinigan (CA); Claude Audet, Kingsey-Falls (CA); Pierre Boulay, Kingsey-Falls (CA); Smail Kalla, Saint-Jérôme (CA); Gérard Gosselin, Québec (CA); and Robert Martineau, Québec (CA)
Assigned to Cascades Canada ULC, (CA)
Filed by CASCADES CANADA ULC, Témiscouata-sur-le-Lac (CA)
Filed on Dec. 28, 2021, as Appl. No. 17/563,769.
Application 17/563,769 is a continuation of application No. 16/374,463, filed on Apr. 3, 2019, granted, now 11,512,428.
Claims priority of application No. CA 3000248 (CA), filed on Apr. 4, 2018.
Prior Publication US 2022/0120036 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. D21C 11/12 (2006.01); D21C 1/02 (2006.01); D21C 11/00 (2006.01); D21C 11/10 (2006.01); F23G 7/04 (2006.01); B01D 1/00 (2006.01); B01D 37/00 (2006.01); D21J 1/00 (2006.01)
CPC D21C 11/12 (2013.01) [D21C 1/02 (2013.01); D21C 11/0007 (2013.01); D21C 11/10 (2013.01); D21C 11/122 (2013.01); F23G 7/04 (2013.01); B01D 1/0011 (2013.01); B01D 37/00 (2013.01); D21J 1/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A process for combusting a hot water extraction (HWE) derived liquor, comprising:
producing the HWE derived liquor comprising:
subjecting wood material to HWE to produce a mixture comprising fibres, water, dissolved solids and suspended solids;
separating the mixture into a fibre-enriched stream and a fibre-depleted stream; and
pre-treating the fibre-depleted stream to yield the HWE derived liquor, wherein the pre-treating comprises suspended solids removal; and
co-combusting the HWE derived liquor and a solid-containing biomass in a combustion chamber, wherein at least part of the solid-containing biomass comprises recovered solids obtained from the suspended solids removal during pre-treating of the fibre-depleted stream.