Dry precipitator employs some form of mechanical impact rapping for collector deposit removal. The particles are removed from the precipitator through rapping and it is always arranged horizontally. The precipitation unit comprises baffles for distributing airflow, discharge & collection electrodes, a dust clean-out system and collection hoppers. Dry precipitators are normally fabricated from thick steel plate, insulated and lagged with aluminum. They operate at very high temperatures and maintain a fly ash in its natural dry condition simplifying material handling. A dry precipitator is installed after the burner blend chamber to remove the fly ash. This arrangement produces cleaner veneer and eliminates dryer vent emissions. They are used for wood fired boiler emissions in wood industry.