CFB Boiler Wearing Zone Abrasion-Resistant Reline
Dense-phase zones suffered severe particle abrasion. A steel-fibre reinforced SiC wear-resistant lining extended the continuous run from 8 to over 12 months.
1Challenge
The wearing zone, dense phase and cyclone inlet endured high-velocity 850–900°C particles. Conventional high-alumina castable wore out in about 8 months, forcing shutdowns for repair.
2Solution
Zones were designed separately: steel-fibre reinforced castable for the wearing zone against thermal shock, and SiC wear-resistant castable for the dense phase and cyclone inlet against abrasion. Aggregate grading and water addition were optimised for density, with a standard dry-out schedule.
3Result
Continuous operation extended from 8 to over 12 months with clearly reduced wear. One overhaul now covers a full heating season, cutting total maintenance cost by about 25%.
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