Пинч / Kemper%20IOMSA%202009%20KC
.pdfEnergy Integration
& Steam Economy
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Based on: |
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Pinch Analysis |
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Process Simulation & |
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Desmet Ballestra / Hytech Expertise |
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Kansas City - June 2009
Author: Marcelo Ferrero
What is Pinch Analysis?
Desmet / Hytech
A systematic methodology based on thermodynamic principles to achieve utility savings by better process heat integration, maximizing heat recovery and reducing the external utility loads (cooling water and heating steam).
Hot and Cold Composite Curves
Desmet / Hytech
T (ºC) |
Heat Recovery Zone |
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Pinch |
TPinchHot |
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TPinchCold |
Tmin. |
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Q (kW) |
QC min. |
QH min. |
Process to Process |
Process to Process |
TPinchHot |
: Must not use cooling utility above this temperature |
Exchangers (Economizers) |
Exchangers (Economizers) |
TPinchCold |
: Must not use heating utility below this temperature |
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QC min. : Minimum Cold Utility (Cooling Water) |
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Coolers (Cooling Water) |
Heaters (Heating Steam) |
QH min. : Minimum Hot Utility (Heat Steam)
Pinch Analysis
Desmet / Hytech
General Process Flow
Meal
Dryer
Grain |
Grain |
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Preparation |
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SEP |
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Feed |
Dryer |
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Oil |
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Boiler
Pinch Analysis
Desmet / Hytech
Case I - SEP (Solvent Extraction Plant)
Meal
Dryer
Grain |
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Preparation |
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SEP |
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Feed |
Dryer |
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Oil |
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Boiler
Pinch Analysis - Case I
Desmet / Hytech
Process Flow Diagram - I
Pinch Analysis - Case I
Desmet / Hytech
Process Flow Diagram - II
Pinch Analysis - Case I
Desmet / Hytech
Hot Streams Curves
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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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35 |
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Thousand Q (kW) |
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Vapors to Vacuum Condenser |
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Oil From Stripper |
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Vapors from DT |
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Water Effluent From Waste Water Evpaorator |
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Vapors to Stripper Condenser |
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Pinch Analysis - Case I
Desmet / Hytech
Cold Streams Curves
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T (ºC) |
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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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35 |
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Thousand Q (kW)
Miscella to Evaporation
Solvent to Extractor
Water Effluent to Waste Water Evaporator
Pinch Analysis - Case I
Desmet / Hytech
Hot and cold composite curves
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T (ºC) |
77ºC |
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85
75
65
55
73ºC
Pinch
Zone
69ºC
65ºC
Cold Stream
45
Hot Stream
35
25
0 |
5 |
10 |
15 |
20 |
25 |
Q (kW) |
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Plant Capacity: 5000 TPD |
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Full Miscella: 27% |
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Thousand |
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Material: Soybean ( Flakes ) |
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DT Dome Temperature: 72ºC (162ºF) |
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Solvent Retention in Meal: 30% |
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