dhrs dynamic heat recovery system

DHRSDynamic

Heat Recovery System

Hariri Chemical Process EngineeringHauptstrasse 16, 4132 Muttenz , Switzerland

www.h-cpe.com

© H-CPEDHRS

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