A volatiles release model has been developed to predict the location and quantity of coal volatiles that are released into a bubbling fluidizedbed combustor, using overbed, in-bed or underbed feed systems. This model not only considers time resolution of the simultaneous processes of coal devolatili
Dynamic model for a bubbling fluidized bed coal combustor
โ Scribed by E. Ikonen; U. Kortela
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 499 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0967-0661
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โฆ Synopsis
The bed fuel inventory is one of the key variables in the fluidized bed combustion process when describing the dynamic behaviour of combustors burning fuels like coal or graphite. Many of the essential features of fluidized bed combustor responses can be simulated with the dynamic model presented. The model consists of differential equations describing the dynamic bebaviour of the furnace and steady-state calculations for the burning of char particles. The simulations show good agreement when compared to process measurements from a commercial-sized coal eombustor.
๐ SIMILAR VOLUMES
A model of coal combustion dynamics in a fluidized bed is developed in this study. The model is carried out on the premise that the total combustion response can be decomposed into two distinct processes: volatile combustion and char combustion. In this investigation, combustion dynamics are examine
Their performance is tested against experimental data for different operating conditions. The importance of the different assumptions is analyzed and discussed. For the conditions analyzed in the present article the model of Rajah and Wen more closely follows the experimental trends. However, some d
## Abstract A reactor model is presented to calculate the sulfur retention and SO~2~ emission of a fluidizedโbed coal combustor with absorption of SO~2~ by limestone or dolomite. It is based on the twoโphase theory of fluidization and a two parameter simplified rate expression for the sulfation rea