a b s t r a c t
Article history:
Received 10 July 2008
Received in revised form 16 December 2008
Accepted 21 December 2008
Available online 31 December 2008
Keywords:
Dust cake
Filtration superficial velocity
Specific cake resistance
Collection efficiency
Cake thickness
Advanced coal-fired power system
In this study we develop an experimental method to help understand the formation and growth of dust
cakes. An on-line pressure-displacement measurement system is developed to measure the thickness of the
dust cakes. A higher filtration superficial velocity resulted in a higher degree of compaction in the dust cakes
and thus a higher specific cake resistance, hence a better collection efficiency could be achieved. The
empirical equations for cake solidosity and specific cake resistance as a function of the filtration superficial
velocity are derived. We find that the cake filter is influenced by the cake thickness and the filtration
superficial velocity. The results of this study can be applied to granular bed filters for the removal of dust
particulates in advanced coal-fired power systems.