7/23/2019 Blowdown Loss

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1. TDS(Total Dissolved Solid) ()2. TDS Foaming()

()Carry overTDS 3. Fire tube boiler 10 /. 10 barg TDS 3000-3500 ppm (Water tube boiler )4. Blow down

Blow down (kg/

) = FxS

B-F

F = TDS (ppm)S = kg/.

B = TDS (ppm)(1)

4000 kg/. (S) TDS (F) 200 ppm TDS 3000 ppm (B) Boiler

Blow down rate (kg/) = 200 x 40003000 200

= 285.7 kg/. (7.14%)(2)

Blow down TDS 2500 ppm 5 barg 70C 41100 kJ/1585% Over blowdown (steam table )

7/23/2019 Blowdown Loss

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Bd. = 200 x 4000 = 348 kg/.

2500 200

Bd. = 348 285 = 63 kg/. = 63 x (670.9 293.02) st.table= 23806.44 kJ/.

= 23806.44 /.(41100 x 0.85)

= 0.68 /. = 0.68 x 15 /.

= 10.2

/

.

5. 5.1 (hf) (hg)

100 % Bd 2 100C 150C

100C hf = 419 kJ/kg.(hg ) = 2676 kJ/kgBd = 419 x100 = 15.66%

2676

150C hf = 628 kJ/kg.(hg) = 2676 kJ/kgBd = 628 x100 = 22.87%

2746

Bd 6.