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Dedusting/Scrubbing
Spray Cooling Systems
Complete APC Solutions
Modern dry process cement kilns force hot kiln gases through a raw mill to dry the raw material, which is then recovered by a dedusting plant. For preventive maintenance purposes, a bypass is utilized to direct the gases around the mill, directly into the dedusting plant. In the case of a lime kiln or an older design cement kiln, the process may be different, but the gas cleaning plant has the same performance requirements.
The dedusting plant has therefore to deal with 2 main gas conditions: 1) low temperature, high dust laden gases exiting the raw mill (combined operation); and 2) low dust load kiln exhaust gases, cooled by water injection in a conditioning tower or bleed in air (direct operation).
The transition between these two operating conditions is especially difficult to handle with an ESP due to rapidly changing dust electrical characteristics. In those cases where the ESP performance needs to be improved, the installation of an efficient evaporative cooling system is recommended.
The trend in recent years has been to replace or upgrade a process ESP with a process fabric filter. Various options in filtration fabrics are available today for installation in fabric filter plants. These modern fabrics have proven themselves capable of being exposed to varying moisture and temperature ranges as well as to varying concentrations of dust.
Process fabric filters
Nuisance filtration
PulseJet fabric filter upgrades
ESP to fabric filter conversions
EGC spray cooling towers
In-duct spray systems
Back-end spray cooling systems
Single and multiple pass
Upflow or downflow
Heat recovery options
Single, dual and quad cyclone designs
Explosion surge vent options
Cast and fabricated multicyclones
Multi-tube collectors
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