Emission control solutions for clinker cooler and pre-heater dedusting sector - Air and Climate
The control of clinker fines emissions after the heatexchanger, placed downstream of the clinkercooler,is usually a problem for cementplant managers. The process is characterized by high material abrasiveness, high loads and variable flow ratein normal and maximum conditions.
Reducing fineparticulates from the exhaust stream ofthe pre-heater toweris also an objective in order to purify the air used for energy recovery, such as heating a petroleum coke or coal mill, thereby increasing the value of thegrinded product. A high efficiency cyclone systemis often used for this purpose.
The general arrangement of a cement plant includes two main exhaust gas streams: the clinker coolerand the pre-heater tower.
Clinker cooler:A bag filter is typically the final stage deduster downstream of a heat exchanger.
The Median Volume Diameter (MVD) of the particles coming from the exhaust gases from the clinker cooler is relatively coarse, ranging from 100µm to 150µm.
Pre-heater tower:A bag filter is usually the final stage deduster. High efficiency cyclones are used upstream to purify the exhaust stream used for energy recovery purposes in applications such as the grinding of coal or pet coke.
The Median Volume Diameter (MVD) of the particles coming from the pre-heater is typically very small, ranging from 2.4µm to 3µm.