Method and apparatus for improved operation of chemical recovery boilers
US11976816B2 · kind B2 · utility
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11References
9Claims
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Key dates
| Filing date | Mar 4, 2021 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Mar 4, 2041 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A chemical recovery boilers is described in which the primary air system is reconfigured to provide aggressive charbed control and improved combustion in the lower furnace. The fewest number of primary air ports are used on two opposing walls to generate powerful air jets that penetrate across the boiler providing physical and thermal stability to the charbed while increasing the heat release and combustion stability in the lower furnace, increasing reduction efficiency, and lowering carryover and emissions. Various embodiments are described including operating strategies and multi-level black liquor injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.