Question

solve part C part D and E

4. A wet scrubber uses lime to remove HCI from a gas waste stream. The scrubber operation characteristics are as follows: Scrubber efficiency Minimum gas velocity 90% 2.5 m/s 18 m3/s 120 ppm, by volume . Gas flow rate HCL Concentration Calculate: a) Scrubber diameter b) HCL removal rate, kg/day c) Required stoichiometric CaO loading, kg/day (theoretical) d) If the lime is only available in a 12% slurry concentration, what is the field application rate, kg/ day If the lime feed is feed at a factor of safety of 2.5:1, what is the lime feed rate, kg/day e)

Answer 1

gjven data Scfubbey efficiency(1)-90% Minimuni 30 velocity (V)- 2.5 mls o Flo Yale Hcl concenhotiam(c)- 120 PPH Sofubber diamebn: Re Avea of Surubben (A) Asume " be the diamelen of wet Scrubbcn a/ 4

HcL Removal Tate, LKa/daj) Hc Remove d = 120x90 = 108 PPM Convension of PPM to um. me occupied by gej slandand epe and R 82. oS Xlo 1629.464-4,n = Ht1 Removed - 108X16 29.46千wym = 1213.687 Kg/dcu Cao Loa

Slep Slef a 1.013m0/1 = 1 1仟 = 0.7665 m3/ J Cao Loadin g O.766SX10kg X 18 1192 2 Kalday Lime feed Factn of Safety- 2.5 2.5 = haking Load 1192.2 uolkir Load Lime seedyee1192.2 | 476.88 Kg/d