Bab v Perhitungan

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PERHITUNGAN KP

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  BAB IV PERHITUNGAN IV.1. Data Komposisi Batubara Massa total batubara = 23886,30 kg  NHV = 5582 kcal/kg komponen Komposisi (%) Carbon 62,34 Hidrogen 4,30 Oksigen 12,72  Nitrogen 0,80 Sulfur 0,60 Uap air 6,40 Abu 12,84 Total 100 Data Komposisi Kiln Feed Massa kiln feed = 205850,44 kg Komponen Komposisi (%) SiO 2  13,08 Al 2 O 3  3,51 Fe 2 O 3  2,36 CaO 44,34 MgO 0,52 LOI 35,77 H 2 O 0,42 Total 100 Data Komposisi klinker Massa klinker = 166667,667 kg  Komponen Komposisi (%) SiO 2  21,20 Al 2 O 3  6,04 Fe 2 O 3  3,40 CaO 66,40 MgO 1,32 LOI 0,36 H 2 O 1,28 Total 100  Data Komposisi Laju Alir Udara Komponen V (m 3 /jam) P (mbar) Udara transport batubara 3.420 300 Udara primer kiln 8.900 160 Udara panas ke EP 125680 3,25 Udara panas ke Raw Mill 177960 2,8 Data Komposisi Laju Udara dari Cooling Fan Fan V (m 3 /jam) P (mbar) K 10 22.004 61,60 K 11 44.962 41,00 K 12 42.950 41,00 K 13 22.985 29,32 K 14 27.845 22,80 K 15 55.590 21,76 K 16 5.285 5,70 K 17 9.834 4,03 K 18 10.855 8,58 K 20 31.052 74,18 K 21 19.880 83,73 K 22 28.995 64,31 Data Temperatur Operasi pada Sistem Kiln T ambient = 25 O C Komponen Inlet T ( O C) Komponen Outlet T ( O C) Kiln feed 900 klinker 140 Coal 77 Exhaust gas 320 Udara 30 Udara panas ke raw mill 400 Udara panas ke EP 320 debu 320  IV.2. Menghitung Neraca Massa Sistem Kiln 1.   Menghitung Laju Alir Udara Untuk menghitung laju alir udara menggunakan rumus m = V x ρ  Perhitungan laju alir digunakan untuk menghitung neraca massa dan neraca energi pada sistem kiln, dengan diketahui sebagai berikut, Tetapan Gaas (R) = 0,082 m 3 atm/Kmol.K Berat Molekul Udara = 28,951 kg/mol Tekanan Atmosfir = 1 atm a. Udara Primer ke Kiln V = 8900 m 3  P  gauge  = 160 mbar = 160 mbar x  ,   = 0,16 atm T = 30 0 C = 303 K Basis 1 jam operasi P absolute = P  gauge  + P atmosfir   = 0,16 atm + 1 atm = 1,16 atm UDARA PRIMER BATUBARA UDARA TRANSPORT BB KILN FEED EXHAUST GAS TO RAWMILL TO CALCINER KLINKER TO EP COOLING FAN  Ρ  = P absolute x BM     = ,6   8,9 /,8        = 1,35 kg/m 3 m = V x ρ  = 8900 m 3  x 1,35 kg/m 3 = 12.008,01 kg b. Udara Transport Batubara V = 3420 m 3  P  gauge  = 300 mbar = 300 mbar x  ,   = 0,30 atm T = 30 0 C = 303 K Basis 1 jam operasi P absolute = P  gauge  + P atmosfir   = 0,30 atm + 1 atm = 1,3 atm Ρ  = P absolute x BM     = ,   8,9 /,8        = 1,51 kg/m 3 m = V x ρ  = 3420 m 3  x 1,51 kg/m 3 = 5164,92 kg c. Udara ke EP (Electrostatic Precipitator) V = 177960 m 3  P  gauge  = 3,25 mbar = 3,25mbar x  ,   = 0,00325 atm T = 320 0 C = 593 K Basis 1 jam operasi P absolute = P  gauge  + P atmosfir   = 0,00325 atm + 1 atm = 1,00325 atm Ρ  = P absolute x BM     
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