Elementary Principles 224 - 6.79 (cont'd) 0100(m0 ) min =...

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6- 58 0100 1000 10 000 9000 0 00 2 1 .( ± )( ± ), : ± : ± min min mm m m =⇒ = = = kg NaCl / h kg / min Evaporation rate kg H O / h Exit solution flow rate 2 b. ± m 2 [kg H O(v) / h] 2 ± m 0 (kg/h) solution ± m 1 (kg/h) sat’d solution @ 80 o C 0.100 kg NaCl/kg 0.281 kg NaCl/kg soln 0.900 kg H 2 O/kg 0.719 kg H 2 O/kg soln 1 0 0 0 k g N a C l ( s ) / h 40% solids content in slurry 1000 2500 11 kg NaCl h = 0 . 4 0 0 () () kg h max max ±± ⇒= NaCl balance 0.100 7025 kg / h Mass balance kg H O evaporate / h 2 : ± .( ) ± : ± m 02 2 0281 2500 2500 4525 = =+ = 6.80 Basis: 1000 kg K Cr O s h 227 . Let K =KC rO , A = dry air, S = solution, W = water. Composition of saturated solution: 020 01667 .. . kg K kg W 1+ 0.20 kg soln kg K kg soln bg ± m e [kg W(v) / h) ± ( . n y y T 2 2 2 39 2 mol / h) (mol W(v) / mol) (1 mol A/ mol)
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