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INNOVATIVE ENERGY SOLUTIONS STRABAG ENERGY TECHNOLOGIES GMBH

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THE COMpANY

INNOVATIVE ENERGY SOLUTIONSThe development of trendsetting and innovative energy solutions is becoming more and more important in view of dwindling resources and the increasing importance of economic sustainability. STRABAG Energy Technologies GmbH (SET) tackles this challenge to protect the environment.

Within the STRABAG SE Group, SET is the competence centre for power plant systems and thermal waste treatment plants. The company offers turnkey solutions worldwide for power plants with low-emission and energy-efficient combustion and waste gas technologies

As part of STRABAG Environmental Technology, the experts at SET together with specialists of other environmental companies of the Group accompany you through all phases of the project - starting with the planning and project financing, continuing with the technical design and construction, right up to operation of the plant.

The company is well acquainted with all relevant EU standards as well as international standards like ANSI, OSHA and SCC.

STRABAG – ON ITS WAY TO THE TOpSTRABAG SE is one of Europe’s leading construction groups. With approximately76,900 employees, STRABAG SE posted an output volume of around € 14.3 billionin 2011. From its core markets of Austria and Germany, STRABAG is present via its numerous subsidiaries in all countries of Eastern and South-East Europe, in selected markets in Western Europe and on the Arabian Peninsula. STRABAG’s activities span the entire construction industry (Building Construction and Civil Engineering, Transportation Infrastructures, Special Ground Engineering and Tunnelling) and cover the entire value-added chain in the field of construction.

SERVICES• SETCIA – Fluidised bed combustion

technology

• Thermal waste treatment (grate firing and

fluidised bed firing)

• Waste gas and waste liquid incineration

• Combined heat and power plants (CHP/

Co-Generation)

• Dry-, semi-dry and wet flue gas treatment

systems

• Flue gas denitrification with SNCR, SCR

and combined technology

• Removal of dioxin and heavy metals

• Turnkey competence, including civil works

• Engineering and consultancy support for

a wide range of applications

• Operation and maintenance of power

plants and incinerators

•SCR catalyst management and

regeneration

• Waste collection logistics

• Mechanical and biological treatment,

including biogas production (via

STRABAG Umweltanlagen GmbH)

• Recycling and stabilisation systems for

combustion residues (via STRABAG

Umweltanlagen GmbH)

• Construction, operation and reclamation

of landfill sites (via STRABAG

Umwelttechnik GmbH)

• Project development and project finance

Titelbild: SNOX OMV refinery, Schwechat (Austria)

1 Kraftwerk Maasvlakte, Rotterdam (Niederlande)

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STEAM GENERATOR

SETCIA – INNOVATIVE FLUIDISED BED COMBUSTION SYSTEMFluidised bed systems are used in technical processes such as drying processes,chemical reactions or in the area of energy conversion. It is being used more andmore above all in power plant technology. By further developing this combustiontechnology, SET has made a decisive contribution to improvement of the perfor-mance and environmental friendliness of these fluidised bed systems. SET’s fluidisedbed boiler can be used for plants with thermal outputs from 20 MW up to over120 MW, and makes it possible for the operator to produce energy economicallywith low emissions. We offer customised solutions adapted to the individual needs.

FUNCTIONALITYSTEAM GENERATORFluidised bed boilers produce steam with high steam parameters for energy efficient conversion and process-heat by combustion of biogenic and waste-derived fuels in a fluidised bed process with an integrated boiler design.

MULTI-STAGE COMBUSTION pROCESSStaged combustion converts the fuel avoiding temperature peaks and hence reducing the slagging and the NOx-formation within the furnace. This is achieved by using a mixture of fresh air and recirculated flue gas at several combustion levels.

OpEN NOzzLE GRIDRefractory lined water cooled eddy gas distributors together with refractory lined nozzle beams allow safe combustion of difficult fuels with high corrosion potential and high coarse particle content. Coarse particles from the fuel can be removed during the combustion process through the nozzle grid allowing re-use of the bed material.

BENEFITS• Low tendency for slagging in the

combustion chamber and boiler

• Excellent behaviour under partial load

• Low emissions

• High operational stability and plant

availability

• Low maintenance costs

FEATURES• Combustion under controlled temperature

conditions

• High flexibility in the event of fuel

fluctuations

• High bandwidth of fuels can be

fired – biomass, multi-fuel, residue and

sludge

• Large heating value range between 4 and

20 MJ/kg

BOILER TYpES SETCIA – Combust it all

• SETCIA-bio

• SETCIA-multi

• SETCIA-residue

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1 Sicet, biomass power plant,

Ospitale di Cadore (Italy)

2 Biomass power plant, Stambolijski

(Bulgaria)

3 Funder, biomass power plant,

St. Veit/Glan (Austria)

4 Biomass power plant model

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THERMAL WASTE TREATMENT

COMpLETE pLANTS We offer our customers a wide range of services as well as numerous different combustion systems for the greatest possible variety of waste. From the rubbish bin to electricity and district heating: SET is your competent partner for the development, design, construction and operation as well as financing of turnkey complete plants. Through various designs, we adapt our solutions optimally to the respective customer requirements. Hence, we can provide support for optimising of operating and mainte-nance costs and contribute to increasing the efficiency of existing plants.

GRATE FIRINGThe first waste combustion plants were built more than 100 years ago. The technology of the continuous stoker-fired systems has been developed in the 1920s and has undergone steady development since then. Today, there are more than 1,000 waste incineration plants in operation - most of them with grate firing technology. Together with its cooperation partners, SET contributes to continuous further development of these complex environmental systems in the areas of grate technology, boiler construction and boiler manufacturing as well as in their operation.

FLUIDISED BED FIRING„SETCIA residue“ – fluidised bed boilers with horizontally positioned heating surfaces („horizontal pass“) for thermal utilisation of alternative fuels, residues, sewage sludge and unsorted domestic waste.

The principle of „reuse instead of dispose“ also applies here as an approach in connection with the EU-wide landfill restrictions.

DESIGNS• Various combustion technologies, e.g.

fluidised bed, air-cooled and water-cooled

grate technology

• Various grate technologies such as for-

ward and reverse acting stocker

• Treatment of unprocessed waste fractions

< 1,200 mm and refuse derived fuel

< 300 mm

• SETCIA - Fluidised bed technology for

the thermal utilisation of pre-sorted and

prepared waste fractions

• Various fuel types such as municipal

waste, bio waste, industrial waste,

household waste, refuse derived fuel

• Wide range of calorific value between 6

to 20 MJ/kg (in individual cases up to

30 MJ/kg)

• Various steam parameters for heat extrac-

tion and utilisation in combined heat and

power cycles

• Plant availability of more than 8,000 h of

operation per year

• Optimisation of ongoing operation

expenses

• Optimisation of revision intervals (plant

overhauls) as well as maintenance

expenses

• Architectural design for harmonious plant

integration into urban areas

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1 RHKW LINZ, WtE power plant,

Linz (Austria)

2 EVI Europark, WtE power plant,

Laar (Netherlands)

3 WtE grate

4 WtE grate firing

5 WtE power plant model

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SETNOx pLANTSEmissions are created when fossil fuels are used for energy and heat generation.Among others, they contain nitrogen oxides and other environmentally harmfulsubstances. Selective Catalytic Reduction (SCR) is the most efficient method ofreducing these nitrogen oxides. By injecting ammonia into the flue gas flow in thepresence of a catalyst, the nitrogen oxides are broken down into atmospheric nitrogen and water. Our expertise and many years of experience guarantee functional and long-lasting solutions for new plants or retrofits, for all types of combustibles, for high-dust or tail-end applications as well as for horizontal or vertical heat recovery steam generators.

DIOxIN REDUCTIONThese catalysts can be used under oxidative conditions to oxidise incompletelyburned organic products as dioxin and furan in the flue gas of waste incinerators.Thereby dioxin and furan are destroyed efficiently.

pATENTED SYSTEMSTo inject and distribute the reagent into the flue gas flow, SET uses the AmmoniaInjection System (so-called AIG), an ammonia injection grid with a patented designthat achieves very high mixing rates in a confined space.

The result is an almost full NOx conversion at low ammonia slip. Pressure loss is extremely low. It is a decisive advantage, especially for installation in the heat recovery steam generator (HRSG) of gas-fuelled power plants with very low emissions as well as for coal fired applications.

RETROFITSRetrofitting of existing old plants for emission reduction and compliance with tighter environmental standards.

Customer-oriented solutions for the optimization of investment and operating costs.

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1 SNOX OMV refinery, Schwechat, (Austria),

2 ATP Mellach power station,

Mellach (Austria)

3 SCR catalyst (honeycomb)

4 SCR-RETROFIT, Laziska (Poland)

FLUE GAS TREATMENT

SETSorp – FLUE GAS CLEANINGIn combustion processes, such as the ones in waste-to-energy plants in particular,acidic gases or dust-forming particles escape into the atmosphere. Through multistage cleaning processes, it is possible to reduce the amount of pollutants considerably. By using filters, absorption and adsorption processes as well as catalysts, the sulphur dioxide, nitrogen oxides as well as dust and soot particles are removed and the quality of the escaping exhaust gas is improved. With the conditioned dry absorption (SETSorp) technology, SET offers an innovative and efficient alternative to conventional methods and ensures compliance with common emission regulations.

THE TECHNOLOGY BEHIND CONDITIONED DRY ABSORpTION (CDA)For efficient separation of acidic pollutants and organic compounds like dioxin andfuran, SET has improved the semi-dry absorption process. In combination with adownstream fabric filter, it is particularly well suited as a flue gas cleaning systemfor waste-to-energy plants. In our advanced CDA process, the lime milk injection isdone by specially developed low-pressure dual fluid nozzles operating on the principle of ultra-sonic atomisation. The nozzles, without any moving parts, are highly durable and easy to maintain. The consumption of atomising agent is small. A special design of the reactor layout and co-current flow optimises the flow pattern to achieve full atomisation and intense mixing of the reagent and flue gas.

ROBUST AND DURABLE qUALITYThe CDA process is characterised by its high reduction efficiency of the pollutionwith low energy demand. Besides the low investment and operating costs, thesystem is completely wastewater free. In addition, the process design preventsthe formation of clumping and blockages. Hence, the system can work with highreliability.

Depending on customer’s wishes, SET plans and delivers complete flue gas cleaning solutions based on wet scrubbing systems.

SNOxTM-SYSTEME (HALDOR TOpSOE A/S)Combined catalytic process for NOx reduction and desulphurisation specifically for high-sulphur content fuels.

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pRODUCTSSETSorp• conditioned dry absorption• 2-stage wet scrubbing

SETNOx• NOx reduction• dioxin reduction

RETROFITS• retrofitting of old plants

SNOxTM

• key components of SNOX plants• EPC or engineering for high-sulphur

content fuels

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1 LP2, SCR refinery and AIG,

Kaohsiung (Taiwan)

2 SNOX OMV refinery, Schwechat (Austria)

3 Karstoe, SCR for HRSG,

Karstoe (Norway)

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SERVICE – OpERATION AND MAINTENANCE

CUSTOMER SUppORT AFTER COMpLETIONThe objective of after-sales management is to ensure that business relations donot end with the project, but remain throughout the lifetime of a power plant. Thismeans that after the start-up of the power plant, SET remains at customer’s side.Our service portfolio includes maintenance and modernisation support for powerplants and industrial facilities. Another target is to support our customers by ourworldwide network with fast and comprehensive service and support. From operation, maintenance and modernisation of the plants through improvement of the performance and reduction of emissions, right up to condition assessment andlifetime costing, SET is your competent partner.

CATALYST MANAGEMENT AND REGENERATION Catalysts are one of the expensive parts of a power plant’s DeNOx system andthey have a limited lifetime. To reduce maintenance costs and to save the costs forthe replacement of catalysts, SET has developed a regeneration process to reversethe ageing of catalysts and to restore their activity. The process can be applied in amobile regeneration plant operating directly on-site. Therefore, no catalyst transportis necessary at all, thus reducing the downtime of the plant to a minimum. Incombination with our sophisticated catalyst management, the operating costs andmaintenance expense can be reduced even more.

BENEFITS OVERVIEW:• Applicable to all catalysts types, regardless of supplier and fuel types• No catalyst transport necessary• Minimal plant downtime• Restoration to full catalyst activity

SERVICES• Operation and maintenance

• Spare Parts Management

• Modernisation and upgrades

• Performance improvements

• Emission reduction

• Plant condition assessment

• Lifetime costing

• Catalyst regeneration

1 Boiler repair

2 + 3 Bowen, Catalyst rejuvenation

Carterville (USA)

4 Repair works

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STRABAG Energy Technologies GmbHPolgarstr. 30, 1220 ViennaTel. +43 1 20117-100, Fax +43 1 20117-111STRABAG AG, Taiwan Branch, Flue Gas TreatmentMin Chuan East Rd. Neihu Distr., 2nd Fl. No. 54 Lane 180 Sec., 11490 Taipei Tel. +886 22791-4071, Fax +886 22794-4174, office@strabag.tw 05

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