Cascades has patented a process for enhanced combustion of hot water extraction (HWE) derived liquor by pre-treating the liquor before introducing it into a combustion chamber. The process involves filtration, evaporation, concentration, and pre-heating of the liquor to improve combustion efficiency. GlobalData’s report on Cascades gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Cascades, Multi-pack shrink wrapping was a key innovation area identified from patents. Cascades's grant share as of May 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Enhanced combustion of hot water extraction derived liquor
A recently granted patent (Publication Number: US12000087B2) outlines a process for combusting a hot water extraction (HWE) derived liquor, which involves producing the HWE derived liquor by subjecting wood material to HWE to create a mixture with fibres, water, dissolved solids, and suspended solids. The process includes separating the mixture into fibre-enriched and fibre-depleted streams, with the latter undergoing pre-treatment to remove suspended solids. The HWE derived liquor is then co-combusted with a solid-containing biomass in a combustion chamber, where part of the biomass consists of recovered solids from the pre-treatment process.
The patent further details various aspects of the process, including the use of wood residues as part of the solid-containing biomass, the addition of wood-based materials from pulp and paper processing, and the methods for supplying the biomass to the combustion chamber. Pre-treatment steps involve dissolved solids concentration and suspended solids removal, with options for different types of separators and filters. Additionally, the process includes pre-heating the HWE derived liquor to a specific temperature and potentially subjecting it to atomization before co-combusting. The presence of a co-combustion fuel such as oil, propane, or natural gas, along with combustion air injected from various locations in the chamber, is also highlighted in the patent claims.
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