Press Presse Press Presse
Industry Sector
Industry Solutions Division
Singapore, July 4, 2011
SIWW 2011, Booth 4J02
Solutions for the power generation market: Siemens helps provide high-quality water for
power producers in Asia
The Asian power industry is currently experiencing a significant increase in power plant
construction. India, for example, has planned to add more than 100,000 megawatts of
capacity in the next five years. The single largest industrial use of water in India is for
power plants, as these plants consume around 90% of the water used by all industries
combined. A reliable water supply, therefore, is vital for the region’s power generation.
Among the critical areas for water treatment and use in power plants are intake screening,
the steam turbines cycle (boiler feed and condensate treatment) and the cooling water
system. Providing these and other solutions, Siemens recently secured several power
projects in Asia.
Water treatment systems for the power generation market have to fulfill specific requirements
depending on their application within the power plant. Intake systems help protect the power
plant’s condenser cooling system from damage, by removing debris from the incoming cooling
water. Bar racks first capture rough and larger debris to prevent it from reaching the finer mesh of
the traveling water screen. The bar racks are cleaned by trash rakes. Siemens’ dual-flow traveling
water screens are positioned parallel to the direction of the flow, and present nearly twice the
screening area and debris carrying capacity of other designs. These screens help to eliminate
debris carryover downstream of the system, making them ideal for intakes that require high
volumes of water or heavy duty debris handling. Siemens is supplying a comprehensive intake
system for a Vietnamese power plant. The system will include dual-flow traveling water screens,
bar racks, grab-style trash rake, interconnecting piping and associated controls for the plant’s
once-through condenser cooling system.
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Siemens AG
Corporate Communications and Government Affairs
Wittelsbacherplatz 2, 80333 Munich
Germany
Reference number: IIS201106.209e fp
Media Relations: Stefanie Schiller
Telephone: +49 9131 7-42913
E-mail: stefanie.schiller@siemens.com
Siemens AG
Industry Sector - Industry Solutions Division
Schuhstr. 60, 91052 Erlangen, Germany
Water treatment solutions for the steam turbines cycle
Siemens’ triple membrane (3Mi) integrated solution is an innovative membrane treatment approach
to achieving consistent, cost-effective boiler feed water. It consists of a Memcor ultrafiltration
system, a Vantage reverse osmosis system and an Ionpure continuous electrodeionization system,
for removing suspended solids, dissolved inorganic impurities and dissolved and suspended
organics. Historically, boiler feed water treatment systems have been based on chemically
regenerated ion exchange resins. In the 3Mi process, the bulk consumption of chemicals, such as
acid and caustic, is eliminated, together with the hazards associated with chemical handling. It also
reduces the production of solid wastes that typically require dewatering and disposal.
Condensate is formed when the steam from the boiler cools. It can be collected and reused as
boiler feed. Prior to reuse, impurities, such as metal oxides, trace ionic impurities and silica from
the power plant’s condensate, have to be removed. Siemens’ spherical condensate polishers help
to improve and maintain the boiler feed water chemistry and increase the likelihood that the power
plant will stay online during small to moderate condenser leaks. To remove impurities from the
condensate, exchange resins can be used. The exhausted resins can be transferred and
regenerated in a Fullsep external regeneration system that allows separation of the resins with
minimum cross-contamination, thus assisting the customer in maintaining consistent high-quality
water.
In India, Larsen & Toubro Limited selected Siemens to provide a condensate polisher package with
external regeneration facility to treat condensate for two 660-megawatt super-critical boilers for a
new power plant. The project involves design, engineering, fabrication, installation, testing and
commissioning of the condensate polisher system, scheduled for start-up in April 2013. Siemens
India and Siemens Singapore will work together to execute the project, including design and
project management.
Chlorination and clarification systems support power plants in India
In the cooling water circuit, micro and macro fouling can occur, which in turn affects the heat
transfer efficiency in the power plant condenser tubes; this can affect the overall power plant
efficiency. This fouling can be controlled by chlorinating the cooling water. The Chloropac seawater
electrochlorination system from Siemens is designed for this purpose. During electrochlorination,
special transformer rectifiers provide DC power with high amperage for electrolysis of the
seawater. The electrolysis produces sodium hypochlorite, which acts as an effective disinfectant to
control biofouling.
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Siemens AG
Corporate Communications and Government Affairs
Wittelsbacherplatz 2, 80333 Munich
Germany
Reference number: IIS201106.209e fp
Media Relations: Stefanie Schiller
Telephone: +49 9131 7-42913
E-mail: stefanie.schiller@siemens.com
Siemens AG
Industry Sector - Industry Solutions Division
Schuhstr. 60, 91052 Erlangen, Germany
One of the largest Greenfield ultra mega power plants in India selected the Chloropac system to
control biofouling in the cooling water. The power plant owner evaluated possible options for
biofouling control including gas chlorination, chlorine dioxide treatment, non-oxidizing biocide
treatment and electrochlorination. Gas chlorination would have required a large number of chlorine
gas storage containers. Safety requirements during handling, storage and use at the site, and
during transport to the site, as well as space requirements, were major considerations. The
Chloropac system not only provided a safer alternative to gas chlorination, but also provided the
lowest lifecycle cost for the application.
Power plants need a consistent, reliable source of water for cooling tower make-up that is also cost
effective and sustainable. In many cases, cooling tower make-up water must be treated for
suspended solids reduction and/or hardness reduction. With properly treated water, the potential
for scaling in the cooling tower is significantly reduced. This reduces cooling circuit cleaning
requirements, extends the life of the cooling equipment, and reduces the cooling tower blowdown
flow to the environment. The Siemens Contrafast Concentric system is a high-rate clarification and
thickening process that consists of a solids contact reaction chamber, clarifier with tube settler and
gravity thickener in a single tank. The entire process is contained in a single, unitized steel basin,
and is designed to simplify installation time and reduce cost. The design allows up to an 80%
reduction in footprint compared to conventional clarification systems, and the process enhances
suspended solids’ removal, lime softening and heavy metals removal.
Siemens received a recent order from Torrent Power Limited for two Contrafast Concentric
systems, which will treat water for the 382.5 megawatt UNOSUGEN gas-based combined cycle
power plant in Surat, district Gujarat, India. The Contrafast Concentric systems will treat water from
the Tapi River and are designed to produce up to 4 million gallons per day (15,142 m3/day) of
cooling tower make-up water.
Chloropac, Contrafast, Fullsep, Memcor, Vantage and Ionpure are trademarks of Siemens and/or
its affiliates in some countries.
For more information, please visit http://www.siemens.com/siww
Further information about solutions for water treatment is available at:
http://www.siemens.com/water
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Siemens AG
Corporate Communications and Government Affairs
Wittelsbacherplatz 2, 80333 Munich
Germany
Reference number: IIS201106.209e fp
Media Relations: Stefanie Schiller
Telephone: +49 9131 7-42913
E-mail: stefanie.schiller@siemens.com
Siemens AG
Industry Sector - Industry Solutions Division
Schuhstr. 60, 91052 Erlangen, Germany
A photo supplements this press release. Please see:
http://www.industry.siemens.com/data/presse/pics/IIS201106209.jpg
Spherical condensate polishing systems are part of the Siemens portfolio
for the power generation market. Photo: Siemens AG
Contact USA:
Ms. Allison Britt
Corporate Communications
Siemens Industry, Inc.
Water Technologies Business Unit
2501 N. Barrington Rd.
Hoffman Estates, IL 60192 USA
Phone 1-847-713-8477
E-mail address allison.britt@siemens.com
The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly
production, transportation and building technologies. With integrated automation technologies and comprehensive
industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of
industry and infrastructure. In fiscal 2010, which ended on September 30, 2010, revenue from continuing operations of
the Industry Sector (excluding Osram) totaled around €30.2 billion. At the end of September 2010, Siemens Industry
Sector had around 164,000 employees worldwide without consideration of Osram. Further information is available on the
Internet at: www.siemens.com/industry.
The Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service
providers for industrial and infrastructure facilities comprising the business activities of Siemens VAI Metals
Technologies, Water Technologies and Industrial Technologies. Activities include engineering and installation, operation
and service for the entire life cycle. A wide-ranging portfolio of environmental solutions helps industrial companies to use
energy, water and equipment efficiently, reduce emissions and comply with environmental guidelines. With around
29,000 employees worldwide (September 30), Siemens Industry Solutions posted sales of €6.0 billion in fiscal year 2010.
www.siemens.com/industry-solutions
4/4
Siemens AG
Corporate Communications and Government Affairs
Wittelsbacherplatz 2, 80333 Munich
Germany
Reference number: IIS201106.209e fp
Media Relations: Stefanie Schiller
Telephone: +49 9131 7-42913
E-mail: stefanie.schiller@siemens.com
Siemens AG
Industry Sector - Industry Solutions Division
Schuhstr. 60, 91052 Erlangen, Germany