PERHITUNGAN NERACA MASSA PERHITUNGAN NERACA MASSA
Basis
Basis perhitungan perhitungan = = 1 1 jam jam operasioperasi Kapasitas
Kapasitas produksi produksi = = 5000 5000 kg/jamkg/jam Jumlah
Jumlah hari hari operasi operasi = = 330 330 harihari Jumlah
Jumlah jam jam operasi operasi = = 24 24 jamjam
Berat Molekul Berat Molekul ::
Diamonium
Diamonium fosfat fosfat (DAP) (DAP) = = 132,06 132,06 gr/ gr/ molmol Diammonium
Diammonium sulfat sulfat (DAS) (DAS) = 6= 68,14 8,14 gr/ gr/ molmol Monoamonum fosfat
Monoamonum fosfat (MAP) (MAP) = 115,03 = 115,03 gr/ molgr/ mol Monoamonum
Monoamonum sulfat sulfat (MAS) (MAS) = = 51,11 51,11 gr/ gr/ molmol Amonia (NH
Amonia (NH33) ) = = 17,03 17,03 gr/ gr/ molmol Asam Fosfat (H
Asam Fosfat (H33POPO44) ) = = 98 98 gr/ gr/ molmol
((PerryPerry dan dan GreenGreen, 1999), 1999)
Penentuan Laju Alir Bahan Baku Penentuan Laju Alir Bahan Baku Komposisi
Komposisi Bahan Bahan Baku Baku : : Komposisi Komposisi produk produk ::
a. 40% P
a. 40% P22OO55 a. a. 88% 88% (NH(NH44))22HPOHPO44 b. 1,7% F
b. 1,7% F b. 1,7% Fb. 1,7% F
c. 52,6% H
c. 52,6% H22O O c. c. 2,2% 2,2% HH22OO d
d 1,6% 1,6% FeFe22OO33 d. d. 1,6%Fe1,6%Fe22OO33 e. 1% Al
e. 1% Al22OO33 e. e. 1% 1% AlAl22OO33 f.
f. 0,3 0,3 %CaO %CaO f. f. 0,3% 0,3% CaOCaO g.
g. 0,6% 0,6% MgO MgO g. g. 0,6% 0,6% MgOMgO h. 2,2% H
h. 2,2% H22S S h. h. 4,6% 4,6% DASDAS (Parker,
(Parker, Bryon Bryon R, R, 1988) 1988) ((www.Material Safety Data Sheet www.Material Safety Data Sheet ,2009),2009)
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A.1.1
A.1.1ScreenScreen II (S-302) II (S-302)
Di-amonium fosfat masuk kedalam
Di-amonium fosfat masuk kedalam scereening II scereening II dengan menggunakan dengan menggunakan elevator. Pada
elevator. Pada screeningscreening di-amonium fosfat yang masuk berukuran <4 mm, akan di-amonium fosfat yang masuk berukuran <4 mm, akan disaring sehingga akan diperoleh produk yang berukuran 2-4 mm. berikut disaring sehingga akan diperoleh produk yang berukuran 2-4 mm. berikut perhitunga
perhitungan neraca mn neraca massa di dalassa di dalamamscereening II scereening II ..
Fraksi DAP berukuran 2-4 mm = 60%
Fraksi DAP berukuran 2-4 mm = 60%
(Fairchild, dkk. 1988) (Fairchild, dkk. 1988)
Neraca M
Neraca Massa total assa total ::
F
F1010 = F = F1212 + F + F1313 F
F1212 = 0.6 F = 0.6 F1010 Neraca m
Neraca massa kompoassa komponen Laju Alnen Laju Alir 12 (Fir 12 (F
12 12
) = 5000 kg/jam ) = 5000 kg/jam (NH
(NH44))22HPOHPO44 = = 88% 88% x x 5000 5000 kg/jam kg/jam = = 4400 4400 kg/jamkg/jam F
F = = 1,7% 1,7% x x 5000 5000 kg/jam kg/jam = = 85 85 kg/jamkg/jam H
H22O O = = 2,2% 2,2% x x 5000 5000 kg/jam kg/jam = = 110 110 kg/jamkg/jam Fe
Fe22OO33 = = 1,6% 1,6% x x 5000 5000 kg/jam kg/jam = = 80 80 kg/jamkg/jam Al
Al22OO33 = = 1% 1% x x 5000 5000 kg/jam kg/jam = = 50 50 kg/jamkg/jam CaO
CaO = = 0,3% 0,3% x x 5000 5000 kg/jam kg/jam = = 15 15 kg/jamkg/jam MgO
MgO = = 0,6% 0,6% x x 5000 5000 kg/jam kg/jam = = 30 30 kg/jamkg/jam DAS
DAS = = 4,6% 4,6% x x 5000 5000 kg/jam kg/jam = = 230 230 kg/jamkg/jam ((www.Material Safety Data Sheet www.Material Safety Data Sheet ,2009),2009)
S-302
S-302 1212
13 13 10
10
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
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(NH
(NH44))22HPOHPO44 = F= F (NH4)2HPO4(NH4)2HPO4/ / 0,6 0,6 = = 7333,3333 7333,3333 kg/jamkg/jam F
F = F= F1212FF/ / 0,6 0,6 = = 141,6667 141,6667 kg/jamkg/jam H
H22O O = F= F1212H2OH2O/ / 0,6 0,6 = = 183,3333 183,3333 kg/jamkg/jam Fe
Fe22OO33 = F= F1212Fe2O3Fe2O3 / / 0,6 0,6 = = 133,3333 133,3333 kg/jamkg/jam Al
Al22OO33 = F= F1212Al2O3Al2O3/ / 0,6 0,6 = = 83,3333 83,3333 kg/jamkg/jam CaO
CaO = = FF1212CaOCaO/ / 0,6 0,6 = = 25 25 kg/jamkg/jam MgO
MgO = = FF1212MgOMgO/ / 0,6 0,6 = = 50 50 kg/jamkg/jam DAS
DAS = = FF1212DASDAS/ / 0,6 0,6 = = 383,3333 383,3333 kg/jamkg/jam Total F
Total F1010 = = 8333,333 8333,333 kg/jamkg/jam
Neraca m
Neraca massa kompoassa komponen Laju Alnen Laju Alir 13 (Fir 13 (F1313)) (NH
(NH44))22HPOHPO44 = F= F
10 10
(NH4)2HPO4 (NH4)2HPO4- F- F
12 12
(NH4)2HPO4
(NH4)2HPO4 = 2933,3333 kg/jam= 2933,3333 kg/jam F
F = F= F1010FF - F - F1212FF = = 56,6667 56,6667 kg/jamkg/jam H
H22O O = F= F1010H2OH2O - F - F1212H2OH2O = = 73,3333 73,3333 kg/jamkg/jam Fe
Fe22OO33 = F= F1010Fe2O3Fe2O3 - F - F1212Fe2O3Fe2O3 = = 53,3333 53,3333 kg/jamkg/jam Al
Al22OO33 = F= F1010Al2O3Al2O3 - F - F1212Al2O3Al2O3 = = 33,333 33,333 kg/jamkg/jam CaO
CaO = = FF1010CaOCaO- F- F1212CaOCaO = = 10 10 kg/jamkg/jam MgO
MgO = = FF1010MgOMgO - F - F1212MgOMgO = = 20 20 kg/jamkg/jam DAS
DAS = = FF1010DASDAS - F - F1212DASDAS = = 153,333 153,333 kg/jamkg/jam Total F
Total F1313 = = 3333,333 3333,333 kg/jamkg/jam
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Komponen BM
Komponen BM
Alur
Alur 12 12 Alur Alur 13 13 Alur Alur 1010 F
F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam) (NH
(NH44))22HPOHPO44 132,06 132,06 4400 4400 33,3182 33,3182 2933,3333 2933,3333 22,2121 22,2121 7333,3333 7333,3333 55,530355,5303 F
F 38 38 85 85 2,2368 2,2368 56,6667 56,6667 1,4912 1,4912 141,6667 141,6667 3,72813,7281 H
H22O O 18,02 18,02 110 110 6,1043 6,1043 73,3333 73,3333 4,0696 4,0696 183,3333 183,3333 10,173910,1739 Fe
Fe22OO33 159,69 159,69 80 80 0,5010 0,5010 53,3333 53,3333 0,334 0,334 133,3333 133,3333 0,83500,8350 Al
Al22OO33 101,96 101,96 50 50 0,4904 0,4904 33,3333 33,3333 0,3269 0,3269 83,3333 83,3333 0,81730,8173 CaO
CaO 56,08 56,08 15 15 0,2675 0,2675 10 10 0,1783 0,1783 25 25 0,44580,4458 MgO
MgO 40,3 40,3 30 30 0,74444 0,74444 20 20 0,4963 0,4963 50 50 1,24071,2407 DAS
DAS 68,14 68,14 230 230 3,3754 3,3754 153,3333 153,3333 2,2503 2,2503 383,3333 383,3333 5,62575,6257 Total
Total 5000 5000 47,0380 47,0380 3333,3333 3333,3333 31,3587 31,3587 8333,3333 8333,3333 78,396778,3967 TOTAL
TOTAL 8333,3333 8333,3333 8333,33338333,3333
A.1.2
A.1.2Screen I Screen I (S-301) (S-301)
Di-Amonium Fosfat (DAP) yang berasal dari
Di-Amonium Fosfat (DAP) yang berasal dari dryer dryer (DD-204) masuk kedalam (DD-204) masuk kedalam screening I
screening I dengan menggunakan elevator. Pada dengan menggunakan elevator. Pada screeningscreening di-amonium fosfat akan di-amonium fosfat akan dipisahkan. DAP yang masuk berukuran <4 mm akan dikirim ke
dipisahkan. DAP yang masuk berukuran <4 mm akan dikirim ke screen II screen II (S-302), (S-302), sedangkan yang berukuran >4 mm akan dikirim ke
sedangkan yang berukuran >4 mm akan dikirim ke Ball Ball MillMill (SR-303) untuk(SR-303) untuk dihaluskan dan mejadi lebih halus. Berikut perhitungan di
dihaluskan dan mejadi lebih halus. Berikut perhitungan di Screen I Screen I ..
Pada Alat ini fraksi DAP yang berukuran < 4 mm adalah 90% dan fraksi DAP yang Pada Alat ini fraksi DAP yang berukuran < 4 mm adalah 90% dan fraksi DAP yang berukuran
berukuran > 4 mm a> 4 mm adalah 10%. dalah 10%. ((Fairchild, dkk Fairchild, dkk . 1988). 1988) S-301
S-301
11 11
9 8 9
8
10 10
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS) (NH
(NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DASS (DAS))
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
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F
F + F + F = F= F + F + F F
F99 = F = F88 + F + F1111 - F - F1010
Neraca m
Neraca massa kompassa komponen Laju Alonen Laju Alir 8 + 11 (Fir 8 + 11 (F88+F+F1111)) (NH
(NH44))22HPOHPO44 = (73= (7333,3333 33,3333 / / 0,9) 0,9) kg/jam kg/jam = = 8148,1481 8148,1481 kg/jamkg/jam F
F = = (141,6667/ (141,6667/ 0,9) 0,9) kg/jam kg/jam = = 157,4074 157,4074 kg/jamkg/jam H
H22O O = = (183,3633/ (183,3633/ 0,9) 0,9) kg/jam kg/jam = = 203,7037 203,7037 kg/jamkg/jam Fe
Fe22OO33 = = (133,3333/ (133,3333/ 0,9) 0,9) kg/jam kg/jam = = 148,1481 148,1481 kg/jamkg/jam Al
Al22OO33 = = (83,3333/ (83,3333/ 0,9) 0,9) kg/jam kg/jam = = 92,5926 92,5926 kg/jamkg/jam CaO
CaO = = (25/ (25/ 0,9) 0,9) kg/jam kg/jam = = 27,7778 27,7778 kg/jamkg/jam MgO
MgO = = (50/ (50/ 0,9) 0,9) kg/jam kg/jam = = 55,5556 55,5556 kg/jamkg/jam DAS
DAS = = (383,3333/ (383,3333/ 0,9) 0,9) kg/jam kg/jam = = 425,9259 425,9259 kg/jamkg/jam
Total F
Total F88 + F + F1111 = 9259,2591 kg/jam = 9259,2591 kg/jam Neraca m
Neraca massa kompassa komponen Laju Alonen Laju Alir 9 (Fir 9 (F99)) (NH
(NH44))22HPOHPO44 = (F= (F88(NH4)2HPO4(NH4)2HPO4+ F+ F1111(NH4)2HPO4(NH4)2HPO4)- F)- F1010(NH4)2HPO4(NH4)2HPO4= 814,8148 kg/jam= 814,8148 kg/jam F
F = = (F(F88FF + F + F1111FF ) - F ) - F1010FF = = 15,7407 15,7407 kg/jamkg/jam H
H22O O = = (F(F88FF + F + F1111FF ) - F ) - F1010H2OH2O = = 20,37 20,37 04kg/jam04kg/jam Fe
Fe22OO33 = (F= (F88Fe2O3Fe2O3 + F + F1111Fe2O3Fe2O3) - F) - F1010Fe2O3Fe2O3 = = 14,8148 14,8148 kg/jamkg/jam Al
Al22OO33 = (F= (F88Al2O3Al2O3 + F + F1111Al2O3Al2O3) - F) - F1010Al2O3Al2O3 = = 9,2593 9,2593 kg/jamkg/jam CaO
CaO = = (F(F88CaOCaO+ F+ F1111CaOCaO) - F) - F1010CaOCaO = = 2,7778 2,7778 kg/jamkg/jam MgO
MgO = = (F(F
8 8
MgO MgO + F + F
11 11
MgO MgO) - F) - F
10 10
MgO
MgO = = 5,5556 5,5556 kg/jamkg/jam DAS
DAS = = (F(F88DASDAS +F +F1111DASDAS) - F) - F1010DASDAS = = 42,5926 42,5926 kg/jamkg/jam Total F
Total F99 = = 925,9259 925,9259 kg/jamkg/jam F
F99 = F = F1111 = = 925,9259 925,9259 kg/jamkg/jam
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(NH
(NH44))22HPOHPO44 = F= F (NH4)2HPO4(NH4)2HPO4= 814,8148 kg/jam= 814,8148 kg/jam F
F = F= F1111FF = = 15,7407 15,7407 kg/jamkg/jam H
H22O O = F= F1111H2OH2O =20,3704 =20,3704 kg/jamkg/jam Fe
Fe22OO33 = F= F1111Fe2O3Fe2O3 = = 14,8148 14,8148 kg/jamkg/jam Al
Al22OO33 = F= F1111Al2O3Al2O3 = = 9,2593 9,2593 kg/jamkg/jam CaO
CaO = = FF1111CaOCaO = 2,7778 kg/jam= 2,7778 kg/jam MgO
MgO = = FF1111MgOMgO = = 5,5556 5,5556 kg/jamkg/jam DAS
DAS = = FF1111DASDAS = = 42,5926 42,5926 kg/jamkg/jam Total F
Total F1111 = = 925,9259 925,9259 kg/jamkg/jam
Maka neraca komponen lahu alir 8 (F
Maka neraca komponen lahu alir 8 (F88) adalah : (F) adalah : (F88 + F + F1111) – F) – F1111 (NH
(NH44))22HPOHPO44 = F= F1212(NH4)2HPO4(NH4)2HPO4/ / 0,6 0,6 = = 7333,3333 7333,3333 kg/jamkg/jam F
F = F= F1212FF/ / 0,6 0,6 = = 141,6667 141,6667 kg/jamkg/jam H
H22O O = F= F1212H2OH2O/ / 0,6 0,6 = = 183,3333 183,3333 kg/jamkg/jam Fe
Fe22OO33 = F= F1212Fe2O3Fe2O3 / / 0,6 0,6 = = 133,3333 133,3333 kg/jamkg/jam Al
Al22OO33 = F= F1212Al2O3Al2O3/ / 0,6 0,6 = = 83,3333 83,3333 kg/jamkg/jam CaO
CaO = = FF1212CaOCaO/ / 0,6 0,6 = = 25 25 kg/jamkg/jam MgO
MgO = = FF1212MgOMgO/ / 0,6 0,6 = = 50 50 kg/jamkg/jam DAS
DAS = = FF1212DASDAS/ / 0,6 0,6 = = 383,3333 383,3333 kg/jamkg/jam Total F
Total F88 = = 8333,333 8333,333 kg/jamkg/jam
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Komponen BM Komponen BM
Alur
Alur 8 8 Alur Alur 1111 F
F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam) (NH
(NH44))22HPOHPO44 132,06 132,06 7333,3333 7333,3333 55,5303 55,5303 814,8148 814,8148 6,176,17 F
F 38 38 141,6667 141,6667 3,7281 3,7281 15,7407 15,7407 0,41420,4142 H
H22O O 18,02 18,02 183,3333 183,3333 10,1739 10,1739 20,3704 20,3704 1,13041,1304 Fe
Fe22OO33 159,69 159,69 133,3333 133,3333 0,835 0,835 14,8148 14,8148 0,09280,0928 Al
Al22OO33 101,96 101,96 83,3333 83,3333 0,8173 0,8173 9,2593 9,2593 0,09080,0908 CaO
CaO 56,08 56,08 25 25 0,4458 0,4458 2,7778 2,7778 0,04950,0495 MgO
MgO 40,3 40,3 50 50 1,2407 1,2407 5,5556 5,5556 0,13790,1379 DAS
DAS 68,14 68,14 383,3333 383,3333 5,6257 5,6257 42,5926 42,5926 0,62510,6251 Total
Total 8333,3333 8333,3333 78,3967 78,3967 925,9259 925,9259 8,71078,7107
TOTAL 9259,2592
TOTAL 9259,2592
Komponen BM Komponen BM
Alur Keluar Alur Keluar Alur
Alur 10 10 Alur Alur 99 F
F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam) (NH
(NH44))22HPOHPO44 132,06 132,06 7333,3333 7333,3333 55,5303 55,5303 814,8148 814,8148 6,176,17 F
F 38 38 141,6667 141,6667 3,7281 3,7281 15,7407 15,7407 0,41420,4142 H
H22O O 18,02 18,02 183,3333 183,3333 10,1739 10,1739 20,3704 20,3704 1,13041,1304 Fe
Fe22OO33 159,69 159,69 133,3333 133,3333 0,835 0,835 14,8148 14,8148 0,09280,0928 Al
Al22OO33 101,96 101,96 83,3333 83,3333 0,8173 0,8173 9,2593 9,2593 0,09080,0908 CaO
CaO 56,08 56,08 25 25 0,4458 0,4458 2,7778 2,7778 0,04950,0495 MgO
MgO 40,3 40,3 50 50 1,2407 1,2407 5,5556 5,5556 0,13790,1379 DAS
DAS 68,14 68,14 383,3333 383,3333 5,6257 5,6257 42,5926 42,5926 0,62510,6251 Total
Total 8333,3333 8333,3333 78,3967 78,3967 925,9259 925,9259 8,71078,7107
TOTAL 9259,2592
TOTAL 9259,2592
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Di-Amonium Fosfat yang berasal dari
Di-Amonium Fosfat yang berasal dari screen I screen I (S-301) masuk ke dalam (S-301) masuk ke dalam Ball Ball Mill
Mill menggunakan menggunakan elevator elevator . Pada. Pada Ball Ball MillMill DAP dipecah agar lebih halus lagi. DAP dipecah agar lebih halus lagi.
Berikut ini perhitungan neraca massa di
Berikut ini perhitungan neraca massa di Ball Mill Ball Mill..
Neraca M
Neraca Massa Total Fassa Total F99 = F = F1111
Maka Neraca komponen F
Maka Neraca komponen F99 adalah : adalah : (NH
(NH44))22HPOHPO44 = F= F1111(NH4)2HPO4(NH4)2HPO4= 814,8148 kg/jam= 814,8148 kg/jam F
F = F= F1111FF = = 15,7407 15,7407 kg/jamkg/jam H
H22O O = F= F1111H2OH2O =20,3704 =20,3704 kg/jamkg/jam Fe
Fe22OO33 = F= F1111Fe2O3Fe2O3 = = 14,8148 14,8148 kg/jamkg/jam Al
Al22OO33 = F= F1111Al2O3Al2O3 = = 9,2593 9,2593 kg/jamkg/jam CaO
CaO = = FF1111CaOCaO = 2,7778 kg/jam= 2,7778 kg/jam MgO
MgO = = FF1111MgOMgO = = 5,5556 5,5556 kg/jamkg/jam DAS
DAS = = FF1111DASDAS = = 42,5926 42,5926 kg/jamkg/jam Total F
Total F1111 = = 925,9259 925,9259 kg/jamkg/jam Total F
Total F99 = = 925,926 925,926 kg/jamkg/jam
SR-303
SR-303 1111
9 9
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
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Komponen BM Komponen BM
Alur
Alur 9 9 Alur Alur 1111 F
F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/jam) (Kg/jam)
N N
(Kmol/jam) (Kmol/jam) (NH
(NH44))22HPOHPO44 132,06 132,06 814,8148 814,8148 6,17 6,17 814,8148 814,8148 6,176,17 F
F 38 38 15,7407 15,7407 0,4142 0,4142 15,7407 15,7407 0,41420,4142 H
H22O O 18,02 18,02 20,3704 20,3704 1,1304 1,1304 20,3704 20,3704 1,13041,1304 Fe
Fe22OO33 159,69 159,69 14,8148 14,8148 0,0928 0,0928 14,8148 14,8148 0,09280,0928 Al
Al22OO33 101,96 101,96 9,2593 9,2593 0,0908 0,0908 9,2593 9,2593 0,09080,0908 CaO
CaO 56,08 56,08 2,7778 2,7778 00495 00495 2,7778 2,7778 0,04950,0495 MgO
MgO 40,3 40,3 5,5556 5,5556 0,1379 0,1379 5,5556 5,5556 0,13790,1379 DAS
DAS 68,14 68,14 42,5926 42,5926 0,6251 0,6251 42,5926 42,5926 0,62510,6251 Total
Total 925,9259 925,9259 8,7107 8,7107 925,9259 925,9259 8,71078,7107
TOTAL 9259,2592
TOTAL 9259,2592
A.1.4
A.1.4 Rotary Drum Dry Rotary Drum Dryerer (CD-204)(CD-204)
Di-Amonium Fosfat yang berasal dari
Di-Amonium Fosfat yang berasal dari Granulator Granulator (TT-203) masuk ke dalam (TT-203) masuk ke dalam Rotary
Rotary Drum Drum DryerDryer (CD-204) menggunakan(CD-204) menggunakan elevator elevator . Pada. Pada Rotary Rotary Drum Drum Dryer Dryer DAP dikeringkan hingga kandungan air di dalamnya berkurang. Berikut ini DAP dikeringkan hingga kandungan air di dalamnya berkurang. Berikut ini perhitunga
perhitungan neraca mn neraca massa diassa di Rotary Drum Rotary Drum Dryer Dryer ..
Neraca M
Neraca Massa Total Fassa Total F77 = = FF1414 + F + F88 Efisiensi Rotary Drum
Efisiensi Rotary Drum dryer dryer = 60% = 60%
((WalasWalas, 1988), 1988)
Maka Neraca komponen F
Maka Neraca komponen F88 adalah : adalah : (NH
(NH44))22HPOHPO44 = F= F88(NH4)2HPO4(NH4)2HPO4 = = 7333,3333 7333,3333 kg/jamkg/jam Rotary Drum
Rotary Drum Dryer Dryer (DD-204)
(DD-204)
7 7
14 14
8 8
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS) H
H22OO
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H
H22O O = F= F H2OH2O = = 183,3333 183,3333 kg/jamkg/jam Fe
Fe22OO33 = F= F88Fe2O3Fe2O3 = = 133,3333 133,3333 kg/jamkg/jam Al
Al22OO33 = F= F88Al2O3Al2O3 = = 83,3333 83,3333 kg/jamkg/jam CaO
CaO = = FF88CaOCaO = = 25 25 kg/jamkg/jam MgO
MgO = = FF88MgOMgO = = 50 50 kg/jamkg/jam DAS
DAS = = FF88DASDAS = = 383,3333 383,3333 kg/jamkg/jam Total F
Total F88 = = 8333,333 8333,333 kg/jamkg/jam
F
F1414H2OH2O = = 60% 60% FF77H2OH2O
F
F88H2OH2O = = 40% 40% FF77H2OH2O
F
F77H2OH2O = = 183,333/0,4 kg/Jam 183,333/0,4 kg/Jam = = 458,333 kg/ 458,333 kg/ JamJam F
F1414H2OH2O = F= F77H2OH2O – F – F88H2OH2O
= 458,333 kg/jam – 183,333 kg/jam
= 458,333 kg/jam – 183,333 kg/jam F
F1414H2OH2O = 275 = 275 kg/ jamkg/ jam
Neraca M
Neraca Massa Komassa Komponen Fponen F77 (NH
(NH44))22HPOHPO44 = F= F88(NH4)2HPO4(NH4)2HPO4 = = 7333,3333 7333,3333 kg/jamkg/jam F
F = F= F88FF = = 141,6667 141,6667 kg/jamkg/jam H
H22O O = F= F88H2OH2O/ / 0,6 0,6 = = 458,3333 458,3333 kg/jamkg/jam Fe
Fe22OO33 = F= F88Fe2O3Fe2O3 = = 133,3333 133,3333 kg/jamkg/jam Al
Al22OO33 = F= F88Al2O3Al2O3 = = 83,3333 83,3333 kg/jamkg/jam CaO
CaO = = FF
8 8
CaO
CaO = = 25 25 kg/jamkg/jam MgO
MgO = = FF88MgOMgO = = 50 50 kg/jamkg/jam DAS
DAS = = FF88DASDAS = = 383,3333 383,3333 kg/jamkg/jam Total F
Total F77 = = 8608,3333 8608,3333 kg/jamkg/jam
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Komponen BM
Komponen BM
Alur
Alur 8 8 Alur Alur 14 14 Alur Alur 77 F
F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam)
F F
(Kg/Jam) (Kg/Jam)
N N
(Kmol/jam) (Kmol/jam) (NH
(NH44))22HPOHPO44 132,06 132,06 7333,3333 7333,3333 55,5303 55,5303 - - - - 7333,3333 7333,3333 55,530355,5303 F
F 38 38 141,6667 141,6667 3,7281 3,7281 - - - - 141,6667 141,6667 3,72813,7281 H
H22O O 18,02 18,02 183,3333 183,3333 10,1739 10,1739 275 275 15,2608 15,2608 458,3333 458,3333 25,434725,4347 Fe
Fe22OO33 159,69 159,69 133,3333 133,3333 0,835 0,835 - - - - 133,3333 133,3333 0,83500,8350 Al
Al22OO33 101,96 101,96 83,3333 83,3333 0,3173 0,3173 - - - - 83,3333 83,3333 0,81730,8173 CaO
CaO 56,08 56,08 25 25 0,4458 0,4458 - - - - 25 25 0,44580,4458 MgO
MgO 40,3 40,3 50 50 1,2407 1,2407 - - - - 50 50 1,24071,2407 DAS
DAS 68,14 68,14 383,3333 383,3333 5,6257 5,6257 - - - - 383,3333 383,3333 5,62575,6257 Total
Total 8333,3333 8333,3333 78,3967 78,3967 275 275 15,2608 15,2608 8608,3333 8608,3333 93,657693,6576
TOTAL 8608,3333 8608,3333
TOTAL 8608,3333 8608,3333
A.1.5
A.1.5GranulatorGranulator (TT-203)(TT-203)
Mono Amonium fosfat (MAP) dan Di-Amonium fosfat (DAP) yang berasal Mono Amonium fosfat (MAP) dan Di-Amonium fosfat (DAP) yang berasal dari reaktor berbentuk
dari reaktor berbentuk slurryslurry akan dikirimkan keakan dikirimkan ke granulator granulator . Di dalam. Di dalam granulator granulator terjadi penambahan amonia, sehingga terbentuk di-amonium fosfat.
terjadi penambahan amonia, sehingga terbentuk di-amonium fosfat. GranulatorGranulator berfungsi
berfungsi untuk untuk mengubahmengubah slurryslurry menjadi butiran. Berikut ini neraca massa pada menjadi butiran. Berikut ini neraca massa pada granulator
granulator ..
TT-203 TT-203 NH
NH33 NH NH33
13 13
7 7 15
17 15 17 6
6
(( NH NH44))22HPOHPO44 (DAP) (DAP) F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO NH
NH44HS (MAS)HS (MAS) (NH
(NH44)H)H22POPO44 (MAP) (MAP)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
(( NH NH44))22HPOHPO44 F
F H H22OO Fe Fe22OO33 Al Al22OO33 CaO CaO MgO MgO (NH)
(NH)22S (DAS)S (DAS)
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menara
menara Absorber. Absorber.
(( Achorn, dkk Achorn, dkk .1960).1960)
Reaksi yang terjadi pada
Reaksi yang terjadi pada granulator granulator adalah: adalah:
(NH
(NH44)H)H22POPO44 + NH + NH33
(NH (NH44))22HPOHPO44 (1)(1) NHNH44HS + NHHS + NH33
(NH (NH44))22S S (2)(2) (( Moore, dkk Moore, dkk . 1957). 1957)Neraca Kesetimbangan Neraca Kesetimbangan : : N
N NH3 NH3OutOut
= N = N NH3 NH3inin
– r
– r 11 – r – r 22 (1) (1) (Reklaitis, (Reklaitis, 1983)1983) N
N(NH4)2HPO4(NH4)2HPO4OutOut = N = N(NH4)2HPO4(NH4)2HPO4inin + + r r 11 (2)(2) N
N(NH4)H2PO4(NH4)H2PO4OutOut = N = N(NH4)H2PO4(NH4)H2PO4inin - - r r 11 (3)(3) N
N
(NH4)2S (NH4)2S
Out Out = N = N
(NH4)2S (NH4)2S in in + + r r
2 2
(4)
(4)
N
N NH4HS NH4HSOutOut
= N
= N NH4HS NH4HSinin
-
- r r 22 (5)(5)
DAP DAP
7 7 DAP
F DAP
F = 7333,3333 kg/ jam = 7333,3333 kg/ jam
7 7 DAP
N DAP
N = =
jam jam kmol 55,5303kmol
55,5303 gr/mol
gr/mol 132,06
132,06
kg/jam kg/jam 7333,3333
7333,3333 MR
MR F F
DAP DAP 13 13 DAP
DAP
13 13 DAP
N DAP
N = =
jam jam kmol 22,2121kmol
22,2121 gr/mol
gr/mol 132,06
132,06
kg/jam kg/jam 2933,3333
2933,3333 MR
MR F F
DAP DAP 13 13 DAP
DAP
7 DAP7
N DAP
N == N N DAP DAP1313 + + N N DAP DAP55 + + N N MAP MAP55
5 5 DAP
N DAP
N + + N N MAP MAP55 = 55,5303kmol/ jam – 22,2121 kmol/ jam = 55,5303kmol/ jam – 22,2121 kmol/ jam
5 5 DAP
N DAP
N + + N N MAP MAP55 = = 33,3182 33,3182 kmol/ kmol/ jam jam (6)(6) Asumsi :
Asumsi :
5 5 MAP
N MAP
N = 6 = 6 N N DAP DAP55
5 5 DAP
N DAP
N + + N N MAP MAP55 = = 33,3182 33,3182 kmol/ kmol/ jamjam 7
7 N N DAP DAP55 = 33,3182 kmol/jam = 33,3182 kmol/jam
5 5 DAP
N DAP
N = = 4,7597 kmol/jam, 4,7597 kmol/jam, dandan N N MAP MAP55 = 33,3182 – 4,7597 = 28,5585 kmol/ jam = 33,3182 – 4,7597 = 28,5585 kmol/ jam
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DAS DAS
N N = =
jam jam mol
mol gr gr MR
MR DAS DAS 55,,62576257
//
14 14 ,, 68
68
13 13 DAS DAS
N N = =
jam jam kmol kmol mol
mol gr gr
jam jam kg
kg MR
MR F F
DAS DAS DAS
DAS 22,,25032503
//
14 14 ,, 68 68
//
3333 3333 ,, 153
13 153
13
7 7 DAS DAS
N
N = = N N DAS DAS 1313 + + N N MAS MAS 55
5 5 MAS MAS
N
N = 5,6257 kmol/ jam – 2,2503 kmol/ jam = 3,3754 kmol/ jam = 5,6257 kmol/ jam – 2,2503 kmol/ jam = 3,3754 kmol/ jam
Reaksi kesetimbangan pada reaksi 1 : Reaksi kesetimbangan pada reaksi 1 :
(NH
(NH44)H)H22POPO44 + + NHNH33
(NH(NH44))22HPOHPO44 MM : : 28,5585 28,5585 y y 00 B
B : : 28,5585 28,5585 28,5585 28,5585 28,558528,5585 S
S : : 0 0 (y (y – – 28,5585) 28,5585) 28,558528,5585 Misalkan NH
Misalkan NH33 awal = y awal = y Maka NH
Maka NH33 sisa pada reaksi 1 = (y – 28,5585) sisa pada reaksi 1 = (y – 28,5585) Reaksi kesetimbangan pada reaksi 2 :
Reaksi kesetimbangan pada reaksi 2 : (NH
(NH44)HS )HS + + NHNH33
(NH(NH44))22SS MM : : 3,3754 3,3754 (y-28,5585) (y-28,5585) 00 B
B : : 3,3754 3,3754 3,3754 3,3754 3,37543,3754 S
S : : 0 0 (y (y – – 31,9339) 31,9339) 3,37543,3754 Maka NH
Maka NH33 sisa pada reaksi 2 = (y – 31,9339) sisa pada reaksi 2 = (y – 31,9339)
NH3 yang
NH3 yang bereaksi abereaksi adalah 88%, ddalah 88%, dan amonian amonia sisa adala sisa adalah 12%ah 12%
Misal : NH
Misal : NH33 awal = y awal = y
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Untuk (NH
Untuk (NH44))22S (DAS)S (DAS) N
NDASDASOutOut
= N = NDASDASinin
+ + r r 22 5,6257 = 2,2503 + r 5,6257 = 2,2503 + r 22 r
r 22 = 3,3754 kmol/ jam = 3,3754 kmol/ jam
Untuk (NH
Untuk (NH44)H)H22POPO44 (MAP) (MAP) N
NMAPMAPOutOut
= N = NMAPMAPinin
- - r r 11 0 = N
0 = NMAPMAPinin - - r r 11 N
NMAPMAPinin
= = r r 11
r
r 11 = 28,5585 kmol/jam = 28,5585 kmol/jam
Untuk NH Untuk NH33 : : N
N NH3 NH3OutOut
= N = N NH3 NH3inin
– r – r 11 – r – r 22 0,12
0,12 y y = = y y – – r r 11 – r – r 22 r
r 11