Sugar Mill Calculations Resource Page

Transcription

1 Enthalpy balance for the evaporators 1 Notes : In Out 1 Heat entering Heat Leaving 2 3 Steam / Vapour In Vapour Out 4 Temperature, oc Temperature, C Latent heat, Kcal Latent heat, Kcal Quantity, MT/Hr Flash from condensate In Quantity, MT/Hr Temperature, oc Total heat in Vent, Kcal 1, Latent heat, Kcal Summary : Quantity, MT/Hr 0 B Heat lost Heat loss % Total Heat admitted Total Vent from evaporators Heat loss, Kcal 2, MT/Hr 0.00 MT/Hr Exhaust in # I Exhaust at other stations MT/Hr Total Exhaust Quantity, MT/Hr % Steam% Actual exhaust estimated Temperature, C % Actual Steam % Cane Targeted Total heat in Condensate, Kcal 21, % Difference between actual vs theoretical Result O.K. D Vapour bleeding : Quantity, MT/Hr E.R Installed No of E.R. Calculated E.R. Total heat in Vapour bled, Kcal 11, MT/Hr Area m^2 Bodies (Kg/m^2/Hr) Area m^2 (Kg/m^2/Hr) # Total ( A+B+C+D ), Kcal 36, # # # ( Juice & ) 1,38, # Quantity, MT/Hr Total heat in Vapour, Kcal Total Evaporation, MT/Hr Juice In Juice Out Quantity, MT/Hr Assumed Brix out Brix Calculated Actual Brix out Temperature, C Quantity, MT/Hr Specific heat of juice out Temperature, C Total heat in Juice, Kcal 36, Total Heat In, Kcal 1,75,216 Total Heat Out, Kcal 1,75,216

2 2 3 In Out In Out Heat entering Heat Leaving Heat entering Heat Leaving Steam / Vapour In Vapour Out Steam / Vapour In Vapour Out Temperature, oc Temperature, C Temperature, oc Temperature, C 96.6 Latent heat, Kcal Latent heat, Kcal Latent heat, Kcal Latent heat, Kcal Quantity, MT/Hr Quantity, MT/Hr 37.4 Flash from condensate In Quantity, MT/Hr 1.0 Flash from condensate In Quantity, MT/Hr 0.3 Temperature, oc Total heat in Vent, Kcal Temperature, oc Total heat in Vent, Kcal Latent heat, Kcal Latent heat, Kcal Quantity, MT/Hr 0.8 B Heat lost Quantity, MT/Hr 3.0 B Heat lost Heat loss % Total Heat admitted 1.5 Heat loss % Total Heat admitted 1.5 Total Vapour In, MT/Hr Heat loss, Kcal 2,085.6 Total Vapour In, MT/Hr 40.4 Heat loss, Kcal Quantity, MT/Hr Quantity, MT/Hr 40.1 Temperature, C Temperature, C Total heat in Condensate, Kcal 17,243.7 Total heat in Condensate, Kcal 4,049.5 D Vapour bleeding : D Vapour bleeding : Quantity, MT/Hr Quantity, MT/Hr 13.7 Total heat in Vapour bled, Kcal 77,766.2 Total heat in Vapour bled, Kcal 8,764.2 Total ( A+B+C+D ), Kcal 97,739.1 Total ( A+B+C+D ), Kcal 13,654.0 ( Juice & ) 41,299.2 ( Juice & ) 29,560.2 Quantity, MT/Hr 37.4 Quantity, MT/Hr 27.3 Total heat in Vapour, Kcal 23,975.5 Total heat in Vapour, Kcal 17,400.9 Total Evaporation, MT/Hr Total Evaporation, MT/Hr 41.0 Juice In Juice Out Juice In Juice Out Quantity, MT/Hr Assumed Brix out 30.1 Quantity, MT/Hr Assumed Brix out 37.6 Brix 16.9 Calculated Actual Brix out 30.1 Brix 30.1 Calculated Actual Brix out 37.6 Temperature, C Quantity, MT/Hr Temperature, C Quantity, MT/Hr Specific heat of juice out 0.8 Specific heat of juice out 0.8 Temperature, C Temperature, C 96.6 Total heat in Juice, Kcal 17,323.7 Total heat in Juice, Kcal 12,159.3 Total Heat In, Kcal 1,39,038 Total Heat Out, Kcal 1,39,038 Total Heat In, Kcal 43,214 Total Heat Out, Kcal 43,214

3 4 5 In Out In Out Heat entering Heat Leaving Heat entering Heat Leaving Steam / Vapour In Vapour Out Steam / Vapour In Vapour Out Temperature, oc 96.6 Temperature, C 83.8 Temperature, oc 83.8 Temperature, C 55.0 Latent heat, Kcal Latent heat, Kcal Latent heat, Kcal Latent heat, Kcal Quantity, MT/Hr 27.3 Quantity, MT/Hr 16.2 Flash from condensate In Quantity, MT/Hr 0.1 Flash from condensate In Quantity, MT/Hr 0.1 Temperature, oc 96.6 Total heat in Vent, Kcal 63.8 Temperature, oc 83.8 Total heat in Vent, Kcal 63.3 Latent heat, Kcal Latent heat, Kcal Quantity, MT/Hr 2.0 B Heat lost Quantity, MT/Hr 9.8 B Heat lost Heat loss % Total Heat admitted 1.5 Heat loss % Total Heat admitted 1.5 Total Vapour In, MT/Hr 29.2 Heat loss, Kcal Total Vapour In, MT/Hr 26.0 Heat loss, Kcal Quantity, MT/Hr 29.1 Quantity, MT/Hr 25.9 Temperature, C 91.5 Temperature, C 72.3 Total heat in Condensate, Kcal 2,665.7 Total heat in Condensate, Kcal 1,870.0 D Vapour bleeding : D Vapour bleeding : Quantity, MT/Hr 15.5 Quantity, MT/Hr 15.2 Total heat in Vapour bled, Kcal 9,802.0 Total heat in Vapour bled, Kcal 9,423.7 Total ( A+B+C+D ), Kcal 12,676.4 Total ( A+B+C+D ), Kcal 11,482.7 ( Juice & ) 18,132.9 ( Juice & ) 12,851.3 Quantity, MT/Hr 16.2 Quantity, MT/Hr 15.0 Total heat in Vapour, Kcal 10,237.9 Total heat in Vapour, Kcal 9,329.7 Total Evaporation, MT/Hr 31.7 Total Evaporation, MT/Hr 30.2 Juice In Juice Out Juice In Juice Out Quantity, MT/Hr Assumed Brix out 46.7 Quantity, MT/Hr Assumed Brix out 60.7 Brix 37.6 Calculated Actual Brix out 46.7 Brix 46.7 Calculated Actual Brix out 60.7 Temperature, C 96.6 Quantity, MT/Hr Temperature, C 83.8 Quantity, MT/Hr Specific heat of juice out 0.7 Specific heat of juice out 0.6 Temperature, C 83.8 Temperature, C 55.0 Total heat in Juice, Kcal 7,894.9 Total heat in Juice, Kcal 3,521.5 Total Heat In, Kcal 30,809 Total Heat Out, Kcal 30,809 Total Heat In, Kcal 24,334 Total Heat Out, Kcal 24,334

4 Condensate management Condensate Flashing Calculations Juice Heaters DC = 0 ; Flow Temp. Flow Temp. Tubular= Exhaust Flow oc MT/Hr oc Vacuum Pans by # 1 Body MT/Hr oc Mixed juice A Massecuite Sulphited juice B Massecuite Clear juice C Massecuite Flow In Flow Out Melt heating C1 Massecuite Syrup heating R1 Massecuite MT/Hr oc MT/Hr oc R2 Massecuite Exhaust # 1 Body Condensate # 1 Flow oc MT/Hr oc R3 Massecuite Condensate Mixed juice R 4 Massecuite PHE Exhaust Condensate Sulphited juice Plate Type Heat Exchanger Clear juice Vacuum Pans by # 2 Body From Cigar Out Chamber Melt heating A Massecuite Syrup heating B Massecuite Super Heated Wash Water System C Massecuite SHWW % Cane 1.41 %Cane # 2 Flow oc MT/Hr oc C1 Massecuite Temperature, C oc Mixed juice R1 Massecuite Quantity 6.20 MT/Hr Sulphited juice R2 Massecuite Clear juice R3 Massecuite Compartment Flow In Flash Vapour Flow Out Melt heating R 4 Massecuite Syrup heating MT/Hr oc MT/Hr oc Vacuum Pans by # 3 Body 1 From PHE Flash MT/Hr # 3 Flow oc MT/Hr oc A Massecuite Mixed juice B Massecuite oc Flash Sulphited juice C Massecuite Clear juice C1 Massecuite Latent heat Melt heating R1 Massecuite Syrup heating R2 Massecuite From 1st Chamber Flash MT/Hr R3 Massecuite # 2 Body Condensate # 4 Flow oc MT/Hr oc R 4 Massecuite # 1 Vapour Heaters oc Flash Mixed juice Sulphited juice Vacuum Pans by # 4 Body Latent heat Clear juice A Massecuite Melt heating B Massecuite From 2nd Chamber Flash MT/Hr Syrup heating C Massecuite # 3 Body Condensate C1 Massecuite # 2 Vapour Heaters Condensate oc Flash # 5 Flow oc MT/Hr oc R1 Massecuite # 2 Vapour Pan Condensate Mixed juice R2 Massecuite Latent heat Sulphited juice R3 Massecuite Clear juice R 4 Massecuite From 3rd Chamber Flash MT/Hr Melt heating # 4 Body Condensate Syrup heating Vacuum Pans by # 5 Body # 3 Vapour Heaters Condensate oc Flash A Massecuite # 3 Vapour Pan Condensate Temp. Pan vapours Melt Concentrator B Massecuite Latent heat Evaporators Flow Temp. MT/Hr oc C Massecuite MT/Hr oc Exhaust C1 Massecuite Out From 4th Chamber # # 1 R1 Massecuite # 5 Body Condensate # # 2 R2 Massecuite # 4 Vapour Heaters Condensate # # 3 R3 Massecuite # 4 Vapour Pan Condensate # # 4 R 4 Massecuite # #

5 Condensate Heaters MT/Hr oc Total Hot water available after flashing Hot water towards PHE Total water remaining Condensate heater 1 ( Outlet temp. of hot fluid is unknown ) MT/Hr oc Brix Raw juice inlet Raw juice outlet Hot water inlet Hot water outlet Heat in Juice A Heat in juice out B loss 5 % Condensate heater 2 ( Outlet temp. of hot fluid is unknown ) MT/Hr oc Brix Sulphited juice inlet Sulphited juice outlet Hot water inlet Hot water outlet Heat in Juice A Heat in juice out B loss 5 % MT/Hr oc Water from SJ condensate heater Water from RJ condensate heater # 5 Vapour Heaters Condensate Water available in Pan Overhead Tank