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- Title
Co-combustion of rice husk pellets and moisturized rice husk in a fluidized-bed combustor using fuel staging at a conventional air supply.
- Authors
Ninduangdee, Pichet; Kuprianov, Vladimir I.
- Abstract
This paper presents an experimental study on co-combustion of two types of rice husk with substantially different properties in a fluidized-bed combustor using fuel staging for lowering NO emission. Rice husk pellets were burned as a base (or primary) fuel, whereas moisturized rice husk was injected downstream from the primary combustion zone as a secondary fuel. The experiments were conducted at 200 kWth heat input to this reactor with a bottom air supply, while the energy fraction of the secondary fuel in the total heat input ranged from 0 to 0.25, and excess air was within 20-80% for each co-firing option. The study revealed significant effects of the operating parameters on combustion and emission performance of the combustor. Compared to burning of the base fuel, a nearly 40% NO emission reduction is achievable with fuel staging, while controlling the CO and CxHy emissions from the combustor to acceptable levels. However, fuel staging causes some deterioration in the combustion efficiency.
- Subjects
RICE hulls; CO-combustion; FLUIDIZED bed reactors; COMBUSTION chambers; EMISSIONS (Air pollution)
- Publication
Songklanakarin Journal of Science & Technology, 2018, Vol 40, Issue 5, p1081
- ISSN
0125-3395
- Publication type
Article