Пинч / Kemper%20IOMSA%202009%20KC
.pdf
Pinch Analysis - Case II
Desmet / Hytech
Hot & cold Composite Curves
135 |
T (ºC) |
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77ºC |
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74ºC |
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115 |
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95 |
65ºC |
68ºC |
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Pinch |
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Zone |
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75 |
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55 |
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Cold Stream |
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Hot Stream |
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35 |
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15 |
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0 |
5 |
10 |
15 |
20 |
25 |
30 |
Thousand Q (kW)
Pinch Analysis - Case II
Desmet / Hytech
Heat Comparison Curves
30
25,9
25
20
16,3
14,6
13,3
4,5
3,7
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(kW) |
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15 |
Heat |
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10 |
Thousand |
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5 |
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0 |
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Hot Streams |
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Cold Streams |
(Cooling Water Requirement) |
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(Heating Steam Requirement) |
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Minimum (Pinch) |
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Note: Heat steam requirement does not include direct |
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Actual Required |
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steam streams required in the process. |
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Maximum (No Economizers) |
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Pinch Analysis
Desmet / Hytech
Case III – For All Sections in the Crushing Plant
Meal
Dryer
Grain |
Grain |
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Preparation |
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SEP |
Edible |
Feed |
Dryer |
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Oil |
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Boiler
Pinch Analysis - Case III
Desmet / Hytech
Conventional Preparation System
Pinch Analysis - Case III
Desmet / Hytech
Grain Dryer Flue Gas from Boiler Direct to Grain Dryer.
Pinch Analysis - Case III
Desmet / Hytech
Grain Dryer - Air Preheating with Flue Gas from Boiler with Intermediate Hot Water Circulating Loop.
Pinch Analysis - Case III
Desmet / Hytech
Grain Dryer and Boiler Integration
Take advantage of flue gas from boiler, cooling exhausting gas from 180 - 200ºC (356 – 392ºF) to 100 - 110ºC (212 - 230ºF).
For example, using a specific air ratio of 60 m3/h/Ton (750.000 m3/h for 5000 TPD plant capacity). The temperature increase in the inlet air is around 10ºC (18ºF).
Heat fuel saving around 25-30% in Grain Dryer.
Pinch Analysis - Case III
Desmet / Hytech
Optimized Grain Dryer with Fire Heating
Pinch Analysis - Case III
Desmet / Hytech
Flash Steam from Meal Steam Dryer recovered in First Stage Evaporator.
Pinch Analysis - Case III
Desmet / Hytech
Flash Steam from Meal Steam Dryer recovered in First Stage Evaporator.
Steam Saving: 4 to 8 Kg per Ton (8-16 lbs/t) Soybean.
Low pressure drop to minimize back-flow potential (safety).
Two vapor inlets: Vapors at 95 – 100ºC (203-212ºF).
Vapors from DT at 70 - 75ºC (158-167ºF).