PERHITUNGAN DOSIS SULFITE

Temperature Air (°C)	Kemungkinan Oksigen Terlarut
	CC/L	Ppm
37.78	4.8	6.86
44.33	4.4	6.29
48.89	4.0	5.72
54.44	3.6	5.15
60.00	3.3	4.72
65.56	3.0	4.29
71.11	2.7	3.86
76.67	2.7	3.43
82.22	1.9	2.72
87.78	1.4	2.00
93.33	0.9	1.29
98.89	0.4	0.58

TABEL :  HUBUNGAN TEMPERATURE AIR

                DENGAN OXIGEN TERLARUT

Rumus Perhitungan Untuk mencari Kg Sulfite:

(8.5 x PPM Oksigen Terlarut ) + [ Residual Sulfite        x 1.6}                                                      Cycle Operasi Boiler

Contoh Perhitungan :

 Temperature Feed Tank      = 98 .5°C

DO (lihat table )                    = 0.5 ppm

Residual Sulfhite                  = 30 -40 ppm (pertengahan 40 )

Cycle Operasi Boiler             = 24 Jam

  

Perhitungan :

=  (8.5 x PPM Oksigen Terlarut ) + [ Residual Sulfite        x 1.6}

                                                         Cycle Operasi Boiler

= (8.5 x 0.5 ) +  (  40     x 1.6 )

                             24

= 4.25 + 2.67

= 6.92 ppm

Kg Sulfhite = ppm x jam operasi boiler x Cap pompa feed Boiler

                                                1000

                     = 6.92 ppm x 20 jam  x 34 T/J

                                          1000

                     = 4.71 Kg

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