Abstract:
The objectives of this study are to design and construct a cyclonic scrubber . The study also examined the effects of three designed parameters on collection efficiency of this scrubber. These parameters include L/G volume ratio (2.8, 3.4, 4.4 l/m3), number and direction of water nozzles ,and dust concentration (2, 4, 6, 8 g/m3). Fine particles used in this experiment come from Mae Moh coal fired power plant in Lampang province. The average particle diameter was 8.8 ?m. The cyclonic scrubber consists of cylindrical shape scrubber with 30 cm diameter and 1 m height. Rectangular shape flue gas entrance 15 cm ?7.5 cm and flue gas exit port 15cm diameter.A water spraying nozzle is installed on the core of the scrubber. In addition , there are air feeding system, water feeding system, and air sampling. The experimental results showed that dust removal efficiency of this scrubber increased with L/G,number and direction of water spraying nozzles but decreased with inlet dust concentration.The optimum conditions found in this experiment were L/G 4.4 l/m3 , 16 nozzles, and concentration of dust 2 g/m3 . These yielded the most effective dust collection efficiency of 99 % at dust particle size more than 1.2 ?m. Number and location of nozzles affected efficiency dust collection at low dust concentration .