dhrs dynamic heat recovery system
TRANSCRIPT
DHRSDynamic
Heat Recovery System
Hariri Chemical Process EngineeringHauptstrasse 16, 4132 Muttenz , Switzerland
www.h-cpe.com
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DHRS, TargetSave Cost using DHRS to recover 1-50 TJ/year
Use DHRS to Reduce:Gasoline / LPG / NPG / NG consumption by min. 50%CO2 emission related Tax chargesCooling Water consumptionSteam consumption
Produce saturated steam (e.g. 3-6 barg)
Supply required demand any time at required conditions
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DHRS, ApplicationsDesigned for:
1. Exothermic Multi-Batch and/or continuous operated reactors. Examples:
HydrogenationEthoxylationOxidationChlorinationPhosgene Production….
2. Heat Recuperation from hot source without reactive background.
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DHRS: Basics
DHRSDynamic Heat Recovery System
14
3
1. Hot + Steam production 2-3 barg2. Intermediate 3. Cold4. Steam production 6 barg
Gas oil or NG
N2
CW-S
CW-R2
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DHRS:
Gasoil or NG
N2
CW-S
CW-R
Multiple Batch or Continuousoperated Reactors
M M
DHRS
Tank-FarmDownstream Batch / Conti
facilities
M
Building
Steam Network
Heat Distribution in conjunction with up- / downstream facilities
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DHRS characteristicsFully automated utility system (Steam & cooling water)Heat storage from multiple batch operated reactors during the phase of reaction and cooling,Supply required heat during the heating phase of the corresponding reactors,Excess Heat to be used for boundary infrastructure:
Tank-FarmDownstream distillation columns Downstream endothermic reactorsProduction of saturated steam within DHRS, supporting the low pressure steam (e.g. 3 barg) networkBuilding during appropriate season
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Example: DHRS Interaction with up- & downstream facilities
Plant Containing:
3 Batch operated Reactors,
Tank-Farm containing 12 Tanks,
1 down stream distillation column,
1 down stream endothermic reactor,
Building heated during appropriate season.
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0
20
40
60
80
100
120
140
160
180
0 2 4 6 8 10 12 14 16
Tch T4 T8 T9
Example: Reactor 1, Batch Temp. profile
1st Batch Reaction 2ed Batch Wash 3rd Batch Reaction
Heating with 6 barg saturated via DHRS
Cooling via DHRS
Reactor Temperature
°C
hPlant Start-up
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Example: Reactor 1, Batch Heat & ÚEnergy profile+ Heating / - CoolingkW
h
-800-600
-400-200
0200
400600
0 2 4 6 8 10 12 14 16
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Total Plant Heat Balance with DHRS+ Required Heat / - Excess HeatGJ
h
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
0.0
2.0
0 20 40 60 80 100
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0.00.20.40.60.81.01.21.41.61.82.0
0 20 40 60 80 100 120 140 160 180
Plant Gas-Oil consumption, 180 hours
With DHRS
h
Without DHRS
m3
Plant Start-up
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DHRS: m,Gas-Oil / m,EO [kg/kg]
h
mGO/EO
0.0%
0.5%
1.0%
1.5%
2.0%
2.5%
3.0%
0 20 40 60 80 100 120 140 160 180
Plant Start-up
kg/kg
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mSP/EO
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 20 40 60 80 100 120 140 160 180
DHRS: m,Steam production / m,EO
h
kg/kg
Plant Start-up
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0%5%
10%15%20%25%30%35%40%45%50%
0 20 40 60 80 100 120 140 160 180
Total Saving using DHRS
h
Plant Start-up
ROI :- depends on various factors - variation between 1.5 – 4 years