Cement, Energy and Environment

• If waste heat is not available, a separate solid fuel fired hot air generator can be used for drying. No separate stock yard, storage space is required as solid fuel is already used for many purposes in the cement plant. Sotution for Fly Ash Drying: Process of Fly Ash Drying by Flash Drying Method. Flash Drying is a wet bulb drying process in which wet material is dried using heat from Hot air. As the complete drying takes place within second the process is called Flash Drying. The typical process Flow in Flash Dryer is as follows: Components of FAD System • • • • • • • FD Fan Hot Air Generator Sieve Shaker Screw Feeder Feed distributor Lump separator Rotary Valve below Lump Separator dryer Hot air Instrumentation duct. for continuous measurement and logging of parameters like Flow, Temperature and Pressure is provided on this duct. • • • • • Drying cum Conveying Duct Air bleeder Assembly for cyclone cum bag house Cyclone cum bag house Assembly ID Fan . All the intermediate ducting and piping tl t nozzles ESP, out of 2 ou e d to 'II b connecte one WI e ·11 be dryer while other WI In exhausted to atmos~he~lel. be f n a1r WI normal opera 10 while directed towards dryery shut ·rgenc in case of e~e mperature down or Hot air te ssed to 2. Three Way Diverter Valve: surge it will be bypa This valve is provided for atmosphere. d isolation of entire dryer Ash Sieving ~et H system from existing air 3. Wet t m· The ot Air Duct: The Hot A'lr F d' 1 ng Sys e · first circuit. The valve will be ee · d is from clinker Cooler if ash to be dne coarse 1. available or from Hot Air having 1 incoming nozzle passed through paratin9 I:~G_e~n_e~ra~t~o~ris~ta~k~e~n~i~nt~o~t~h~e~ ____ w_h_ic_h_w __ ill_t_a_k_e_H_o_t_a_i_r_f_ro_m ______ ~si~e~ve~s~h~a--ker tor se Typical schematic for Fly Ash Dryer {FAD):