A model of coal combustion dynamics in a fluidized bed combustor

Use of a transient model to simulate fluidized bed incineration of sewage sludge

“…1) are known to be very efficient for sludge incineration [2], this study focuses on the modeling of these devices. Such models have already been derived both for coal combustion or gasification [3][4][5][6][7][8][9][10] as well as for biomass and sludge incineration or gasification [11][12][13][14]. One of the main drawbacks of these models is that the reactor is often considered as isothermal and/or to operate at stationary conditions.…”

“…The high heating value gas [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][20][21][22][23][24][25][26][27][28][29][30] is composed of light hydrocarbons and pollutants, which are released in both emulsion and disengagement. More precisely, if we suppose that β represents the fraction of volatiles released within the disengagement andṁ vol the total mass flow rate of volatile matter, then the specific mass flow of volatiles drained out of the emulsion (in order to keep it in incipient fluidization conditions) towards the bubbles is expressed as:…”