Improvement of operating conditions of existing circulating fluidised bed combustor units, as well as attempts to scale up present units to larger ones, are mainly based on empirical correlation or simplified scaling laws.
Pressure drop and cut size measurements are reported for a full scale cyclone operating within a 58 MWth CFB-combustor unit at 775 °C.
For this purpose, a 150 kWt CFB combustor test unit is designed and constructed in Chemical Engineering Department of Middle East Technical University, based on the extensive experience acquired at the existing 0.3 MWt Bubbling Atmospheric Fluidized Bed Combustor (AFBC) Test Rig.
The largest exergy destruction is observed in the gas turbine combustor and reformer units, providing additional scope for efficiency enhancement.
The proposed design was constructed by integrating vaporizer, reformer and combustor into a single unit.
Case 1 does not produce any H2, and therefore H2-rich Tail gas-1 follows route II (as seen in Figure 1a), which is then supplied to the combustor of the GT unit after reheated to 350 °C.
The lower sugar conversion efficiencies in LHW pretreatment result in higher enzyme loadings required in saccharification and fermentation to drive sugar release, as well as an increased amount of undigested biomass being sent to the combustor, ultimately inflating the unit MESP for this process.
Erosion in fluidized-bed combustors, commercial process units used to burn coal cleanly, has surfaced as a serious issue that may have adverse economic effects.
