Capture Ready – Retrofit Solutions for Steam Power Plants · 2009-10-12 · Raw wa ter & c oling wa supply / W aste w ter ... pipe racks Sufficient space for installation of

Page 1 CCS presentation April 2009 Copyright © Siemens AG 2009. All rights reserved.

Capture Ready –

Retrofit Solutions for Steam Power Plants

Siemens Energy Sector

Capture Ready –

Retrofit Solutions for Steam Power Plants

Siemens Energy Sector


EU Directive 2009/31/EC published 5th

June 2009 Capture Ready Assessment Mandatory

for New Fossil Power Plants >300 MW

Indication and evaluation of potential storage sites reasonably accessible to the project.

Evaluation of viable transportation options.

CO2

Transportation & Storage

Reservation of sufficient area on the site for the later retrofit of the CO2 capture unit with CO2 compression, for all plant integration measures and for retrofit-construction period.

Assessment of the economic and technical aspects for the later retrofit and integration of the CO2 capture unit – different options for the respective retrofit strategies.

Selection of “best-available-capture-technology”, capture ready concepts for technology routes are deviant.

Delivering capture readiness should not result in a plDelivering capture readiness should not result in a plant operating ant operating inefficiently until CCinefficiently until CCS is fitted.S is fitted.

Carbon Capture technology


Capture Ready Requirements All measures defined -

reference Siemens steam power plant layout SSP5-6000

Steam turbines•

extraction of approx. 40 % of LP cross over steam

•

options for modification of turbines depend on operation modes

(part load, full load capability w/o CO2 capture, other plant and site conditions)

Steam turbine buildingsufficient space/foundation for:• modification of turbines• steam and condensate pipes• installation of heat exchangers

Our offer proposal:

Integration of carbon capture unit into thepower plant

“Capture Ready / Retrofit Solutions”

FGD•

either consider capacity extension in column design

•

or provide space for enlarged FGD unit

Air heatingOptional: space for installation of heat exchanger(s) for lowest grade heat utilization

Exhaust ducts•

consider Δp from CO2

absorption unit •

later flue gas connection to capture unit (T-branch)

Flue gas fan•

upgradeable design•

or additional space for installation of second fan downstream of FGD

Electrical auxiliary loadsufficient space for:•

additional auxiliary transformer(s)•

switchyard•

cable routes

Condensate system,sufficient space for:•

heat exchangers for low grade heat utilization

•

additional piping routes with supporting structure / racks

Cooling systemsufficient space for:•

additional circulation pumps•

service water system•

sufficient cooling capacity of cooling tower

Raw water & cooling water supply / Waste water treatment• sufficient space for enlargement• secure water utilization rights


Steam Turbine

Civil design with sufficient space forrespective equipment installation

either with first installationor later with retrofit of capture plant

Rebuild of steam turbine necessary,depending on:

site conditions (especially capability of final heat sink)required operating modes (part load importance, full load capability w/o capture etc.)

Capture ready measuresto be considered in capture ready design

Additional recommendation forpre-investment:Prepared cross-over pipe for tee branch and control valve

Steam turbine capable to be adapted for

steam extraction of approx. 40 % of low pressure steam;e.g. from cross-over pipe


Turbine Building

Space for process steam / condensate pipe routing inside turbine building including necessary supporting structures, drains etc.

Adaption of height of turbine building:caused by additional height of cross-

over pipe due to required tee-branch and control valve (sufficient height for crane hook)

Space for de-superheating of process steam

heat exchangerspiping etc.

Space for installation of heat exchangers for low grade heat utilization including necessary piping



Process Steam And Condensate Piping Condensate preheating

Sufficient space for:process steam/ condensate pipe routing in-/& outside of turbine buildingadditional equipment (e.g. for de-superheating of extracted steam, drains etc.)necessary supporting structures and pipe racks

Sufficient space for installation of equipment for low grade heat utilization (mainly from CO2

compressor intercoolers)

Process steam / condensate piping

Condensate preheating



Electric Power Supply

Adaptation of auxiliary power supply

Sufficient space for:additional auxiliary transformer(s)switchyard sufficient cable ways



Combustion Air Intake Induced Draft Fan

Optional: Sufficient space for installation of heat exchanger(s) for lowest grade heat utilization.--> Option (under evaluation)

1


Combustion air intake

Induced draft fan

To overcome additional pressure drop from capture plant:

Either upgradeable induced draft fan (limited by ∆p of Carbon Capture Plant)

Or space for installation of a second fan (booster) downstream of FGD

Optional: Sufficient space for installation of heat exchanger(s) for lowest grade heat utilization.--> Option (under evaluation)


Flue Gas Desulphurization

Either from first beginning installation of an advanced FGD plant capable of fulfilling future requirements of capture plant (SO2 outlet FGD 5 to 30 mg/Nm3, current EU level 200 mg/Nm3)

Or larger FGD design for later capacity extension

Or space for later enlargement of the desulphurization unit

Recommendation for pre-investment:Larger main FGD at first installation prepared for adding additional absorption spray stages.



Flue Gas Ducts Downstream FGD

Later installation of a flue gas connection (tee-branch) with diverter damper for flue gas routing to the capture plant

Later installation of additional FGD equipment

Later installation of a flue gas fan to overcome the pressure drop of the capture plant

3

Additional recommendation forpre-investment:Design pressure for flue gas ducts ready to accept additional Δp from future capture plant.

Sufficient space and a flue gas duct routing prepared for:


Later installation of a flue gas fan to overcome the pressure drop of the capture plant


Cooling System

For once through cooling

consider:up to two more intake structures for additional circulating water pumps / pipingenlarged discharge natural draught cooling tower depending on site conditions.

For wet cooling tower plants

assure:that higher heat loads during capture operation can be processedconsider interface measures within the cooling tower

adaption of water utilization rightsto capture operation requirements

1

Additional recommendation forpre-investment:Intake / outfall structure(s)pump housing(s) for additional cooling water pump(s)

Site specific heat sink needs different measures:

sufficient space for extension of either service water system or circulating water system with pumps and heat exchangers for capture plant cooling service

4


For once through cooling

consider:up to two more intake structures for additional circulating water pumps / pipingenlarged discharge natural draught cooling tower depending on site conditions.

sufficient space for extension of either service water system or circulating water system with pumps and heat exchangers for capture plant cooling service


Make Up Water and Waste Water Treatment Plants

Sufficient space for enlargement of:raw water inlet systempre-treatmentdemineralization

Sufficient space for enlargement of:waste water treatment plantwaste water disposal

Additional recommendation forpre-investment:Enlarged demineralization plantAdaption of water utilization rights

to capture operation requirements3


Adaption of water utilization rightsto capture operation requirements


General Plant Layout

Rearrangement of main components according to technological requirements from capture process

“Stack-in-tower flue gas exhausting”

(Wet cooling tower w/o flue gas stack)Option 1 Option 2

“Once through cooling and flue gas stack”(Circulating water cooled with flue gas stack)


Optional discharge natural draught cooling

tower (fan assisted)


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Capture Ready – Retrofit Solutions for Steam Power Plants · 2009-10-12 · Raw wa ter & c oling wa supply / W aste w ter ... pipe racks Sufficient space for installation of