5. Continous Settling Tank
T = 90 C
-Minyak -Air
-Kotoran -FFA
T = 90 C
-Minyak -Air
-Kotoran -FFA
T = 90 C
-Minyak -Air
-Kotoran T = 90
C -Minyak
-Kotoran -Air
14 16
25 15
CST
Panas Masuk : Alur 14
Q Minyak = 5.505,515 kg x 15,307 kJkg K x 65 K
= 5.477.739,677
kJ Q Kotoran
= 1.092,513 kg x 0,882 kJkg K x 65 K =
62.633,770 kJ
Q Air = 6.068,037 kg x 4,2164 kJkg K x 65 K
= 1.663.042,628
kJ Q FFA
= 641,402 kg x 8,866 kJkg K x 65 K =
287.085,121 kJ
Alur 25 :
Q Minyak = 2.349,173 kg x 15,307 kJkg K x 65 K
= 2.337.321,422
kJ Q Kotoran
= 29,312 kg x 0,882 kJkg K x 65 K =
1.680,457 kJ
Q Air = 439,959 kg x 4,2164 kJkg K x 65 K
= 120.577,803
kJ Total Panas yang Masuk
= 9.950.080,878 kJ
Universitas Sumatera Utara
Panas Keluar : Alur 15 :
Q Minyak = 558,856 kg x 15,307 kJkg K x 65 K
= 556.036,572
kJ Q Kotoran
= 8.344,011 kg x 0,882 kJkg K x 65 K =
478.362,151 kJ
Q Air = 569,276 kg x 4,2164 kJkg K x 65 K
= 156.019,196
kJ
Alur 16 :
Q Minyak = 5.270,352 kg x 15, kJkg K x 65 K
= 5.243.763,074
kJ Q Air
= 27,593 kg x 4,2164 kJkg K x 65 K =
7.562,303 kJ
Q Kotoran = 11,037 kg x 0,882 kJkg K x 65 K
= 632,751
kJ Q FFA
= 209,710 kg x 6,866 kJkg K x 65 K =
93.591,476 kJ
Total panas yang keluar = 6.535.967,523 kJ
Panas hilang = Panas masuk – Panas keluar = 9.950.080,878 – 6.535.967,525
= 3.414.113,353
kJ
Tabel LB.5 Neraca massa pada C.S.T
Panas masuk kJ Panas keluar kJ
Komposisi Alur 14
Alur 25 Alur 15
Alur 16
Minyak Kotoran
Air FFA
5.477.739,677 62.633,770
1.663.042,628 287.085,121
2.337.321,422 1.680,457
120.577,803 -
556.036,572 478.362,151
156.019,196 -
5.243.763,074 7.562,303
632,751 93.591,476
Jumlah 7.490.501,196 2.459.579,682 1.190.417,919 5.345.549,604
Panas hilang -
- -
3.414.113,353
Total 9.950.080,878 9.950.080,878
Universitas Sumatera Utara
6. Sludge Tank
T = 90 C
-Minyak -Air
-Kotoran
T = 80 C
-Minyak -Air
-Kotoran T = 90
C -Air
-Kotoran 15
23 24
Sludge Tank
Panas Masuk : Alur 15 :
Q Minyak = 558,856 kg x 15,307 kJkg K x 65 K
= 556.036,572
kJ Q Kotoran
= 8.344,011 kg x 0,882 kJkg K x 65 K =
478.362,151 kJ
Q Air = 569,276 kg x 4,2164 kJkg K x 65 K
= 156.019,196
kJ Total panas yang masuk
= 1.190.417,919 kJ
Panas Keluar : Alur 23 :
Q Air = 55,033 kg x 4,2164 kJkg K x 65 K
= 15.082,267
kJ Q Kotoran
= 23,586 kg x 0,882kJkg K x 65 K =
23,586 kJ
Alur 24 :
Q Minyak = 2.475,194 kg x 15,307 kJkg K x 65 K
= 3.283.608,198
kJ Q Air
= 6.650,615 kg x 4,2164 kJkg K x 65 K =
1.822.707,451 kJ
Q Kotoran = 267,715 kg x 0,882 kJkg K x 65 K
= 15.348,101
kJ Total panas yang keluar
= 4.317.197,057 kJ Panas Masuk + Panas dibutuhkan = Panas Keluar
Universitas Sumatera Utara
Panas dibutuhkan = Panas Keluar – Panas Masuk
= 4.317.197,057 – 1.190.417,919 =
3.126.779,138 kJ
Entalphi steam pada 70,11 kPa, T 90 C = 2.283,2 kJkg K Saturated steam
Maka Steam yang dibutuhkan : m
= λ
dQ
=
kJkg 2.283,2
kJ 138
3.126.779,
= 1.369,472 kg
Tabel LB.6 Neraca Panas pada Sludge Tank
Panas masuk Panas keluar
Komposisi Alur 15
Alur 23 Alur 24
Minyak Air
Kotoran 556.036,572
156.019,196 478.362,151
- 15.082,674
1.352,185 2.462.706,646
1.822.707,451 15.348,101
Panas dibutuhkan 3.126.779,138
- -
Jumlah 4.317.197,057 16.434,859
4.300.762,198
Total 4.317.197,057 4.317.197,057
Universitas Sumatera Utara
7. Sludge Separator
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