Effect of kaolinite on control of hard deposit formation and alteration of fine particles in a commercial circulating fluidized bed boiler burning solid refuse fuel
| Autor: | Jong-Seon Shin, Yujin Choi, Dowon Shun, Dongho Lee, Dal Hee Bae, Keun Hee Han, Seung Yong Lee, Hyunji Jun |
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| Rok vydání: | 2021 |
| Předmět: |
Flue gas
Materials science General Chemical Engineering Oxide 02 engineering and technology 021001 nanoscience & nanotechnology Combustion chemistry.chemical_compound 020401 chemical engineering chemistry Chemical engineering Fly ash Kaolinite Particle Particle size 0204 chemical engineering Molten salt 0210 nano-technology |
| Zdroj: | Powder Technology. 389:549-560 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2021.05.031 |
| Popis: | Solid refuse fuels (SRF) and biomass contain significant amounts of KCl and NaCl which result in operation problems such as hard deposit formation in combustion. The effect of kaolinite in the decomposition of mineral chlorides in a commercial SRF-burning CFBC boiler is investigated. The injection of kaolinite with SRF in a commercial CFBC shows its effect on mineral chloride decomposition thus softens the hardness of the deposit on the heat exchanger tubes in the convection pass. By the reaction of molten salt with kaolinite, particles under 5 μm in the flue gas is significantly reduced. After 37 days operation with kaolinite use the PM 10 particle in flue gas is reduced originally 86 mg/Nm3 to 16 mg/Nm3, which is 81% reduction. The reaction of physical and chemical adsorption of metallic oxide component to kaolinite particle is also monitored by SEM images. This result is reflected to the particle side distribution of the fly ash in that the shift of the abundant particle size peak to a larger size cut after the use of the kaolinite. |
| Databáze: | OpenAIRE |
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