Пинч / Kemper%20IOMSA%202009%20KC
.pdf
Pinch Analysis - Case I
Desmet / Hytech
Figures from the Hot and Cold Composite Curves.
Reminder:
Do not use cooling water above 73 ºC (163 ºF)
Do not use heating steam below 69 ºC (156 ºF)
Pinch Analysis - Case I
Heat Comparison Curves
14,2
12,0
1,4
0,9
Cold Streams
(Heating Steam Requirement)
Note: Heat steam requirement does not include direct steam streams required in the process.
Desmet / Hytech
30
25,3
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Hot Streams
(Cooling Water Requirement)
Minimum (Pinch)
Actual Required
Maximum (No Economizers)
Pinch Analysis - Case I
Desmet / Hytech
Estimated SEP Steam Consumption
Pinch Analysis - Case I
Desmet / Hytech
Heat Comparison Curves
(*)
(*) Note: In these numbers, direct steam streams are included .
The actual steam comsumption of a standard plant (with all the economizers) is very close to the minimum possible (Pinch).
The actual steam savings of 236 – 148 = 88 Kg/Ton (176 lbs/t) is about 96% of the maximum saving possible of 236 – 144 = 92 Kg/Ton (185 lbs/t).
Pinch Analysis - Case I
Desmet / Hytech
First Stage Evaporator
105 |
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T (ºC) |
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95 |
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85 |
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75 |
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65 |
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55 |
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45 |
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Thousand Q (kW)
Vapors from DT
Full Miscella
Pinch Analysis - Case I
Desmet / Hytech
2nd Stage Evaporator
105 |
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T (ºC) |
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95 |
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85 |
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75 |
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Pinch Temperature Range |
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65 |
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55 |
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45 |
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35 |
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0,0 |
0,5 |
1,0 |
1,5 |
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Thousand Q (kW) |
Miscella from Oil to Miscella Economizer
Pinch Analysis - Case I
Desmet / Hytech
Vacuum Condenser
105 |
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T (ºC) |
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95 |
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85 |
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75 |
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Pinch Temperature Range |
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65 |
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55 |
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45 |
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35 |
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Thousand Q (kW) |
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Vapors to Vacuum Condenser
Pinch Analysis - Case I
Desmet / Hytech
Oil to Miscella Economizer
105 |
T (ºC) |
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95 |
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85 |
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75 |
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65 |
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45 |
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35 |
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0,00 |
0,25 |
0,50 |
0,75 |
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Thousand Q (kW) |
Miscella from First Stage Evaporator
Oil from Edible Oil Stripper
Pinch Analysis - Case I
Desmet / Hytech
Solvent Pre-Heater using Excess DT Vapor
105
T (ºC)
95
85
75
65
55
45
35
25
0,00 0,25 0,50 0,75 1,00
Thousand Q (kW)
Solvent from Work Tank
Vapors from First Stage Evaporator
Pinch Analysis - Case I
Desmet / Hytech
DT & Vent Condenser
105 |
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T (ºC) |
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95 |
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85 |
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75 |
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Pinch Temperature Range |
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65 |
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55 |
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45 |
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35 |
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0,0 |
0,5 |
1,0 |
1,5 |
2,0 |
Thousand Q (kW)
Vapors from Solvent Pre-Heater