TY  - EJOU
AU  - Ba, Qingxin 
AU  - Li, Xuefang 

TI  - MEASUREMENTS AND MODELING OF FLUID FLOW AND THERMAL  PROCESSES IN AN INDUSTRIAL PRECALCINER
T2  - Frontiers in Heat and Mass Transfer

PY  - 2019
VL  - 12
IS  - 1
SN  - 2151-8629

AB  - Precalciner performance is crucial to the production rate and lifespan of cement kiln systems. The gas-solid flow and pulverized coal combustion 
processes in an industrial precalciner were numerically modeled to understand the flow patterns and thermal processes in the system. The gas and meal 
flow rates and properties were measured on-site to determine the boundary conditions for the simulations and to validate the models. The upward swirl 
of the gas flow in the furnace helped disperse the particles and extend their duration in the precalciner. The O<sub>2</sub> and CO<sub>2</sub> concentration distributions
indicated that the coal particles were well dispersed and fully combusted. The calculations showed that the precalciner outlet temperature was too high 
which reduces the thermal efficiency and may damage the preheater installed just after the precalciner. Finally, an optimized precalciner was proposed
to improve the temperature distribution. The present work can be used for improving the design of industrial precalciners.
KW  - <i>two-phase flow
KW  -  combustion
KW  -  numerical simulation
KW  -  on-site measurements</i>

DO  - 10.5098/hmt.12.20