POWER May 2012 - 104

EUROPE SPECIAL ADVERTISING SECTION
Record contract for HRSGs at Saudi power plant
NEM's distinctive know-how and continuous technological innovation have brought the
steam generation specialist a big order for a combined cycle plant conversion
EM Energy b.v., with a staff of over 550
dedicated employees, supplies custom
solutions and services for industrial, utility
and heat recovery steam generators (HRSGs)
in power generation and industrial applications
throughout the world. NEM has now
powered over 3,500 MW worldwide.
A recent contract for the PP10 combined
N
cycle power plant in Saudi Arabia is the largest
project in the firm's history. NEM's order
from Arabian Bemco Contracting Co. Ltd. in
Jeddah is for 40 unfired dual pressure heat
recovery steam generators. These steam
generators with integral deaerator are of the
vertical gas flow natural circulation type.
With a value of several hundred million dollars
the complete PP10 project is one of the
largest in history, and will create the world's
largest combined cycle power plant. For NEM
it represents an entry to one of the most
promising HRSG markets globally.
The first phase of PP10 is already running
as an open cycle power plant. The gas
turbines are site-rated at 55.9 MW per unit
and operate mainly on Arabian crude oil. The
conversion to combined cycle will increase
capacity from 2,200 MW to 3,500 MW, providing
around 20% of the power needs of
the city of Riyadh, which has over 5.2 million
inhabitants. PP10 will have ten blocks
arranged in 4-on-1 configuration.
NEM is a global leader in steam generating
equipment. The company supplies
HRSGs, direct fired boilers, process boilers
and power plant components such as diverters
and dampers. NEM also offers engineering
and maintenance services.
HRSGs take up the largest portion of
NEM's activities. With over 80 years' experience,
the firm is driven by its distinctive
know-how and continuous technological
innovation, with an eye for new applications
such as steam generation for enhanced
oil recovery and solar power applications.
Services for HRSGs range from custom
design through to aftermarket services.
Being a global leader means maintaining
high standards in the quality of products and
services, and in the know-how and dedication
of staff. Every detail of how NEM conducts
its business is managed with care and
meets strict quality standards.
NEM supplied two HRSGs for a combined
cycle plant in Portugal, which started up
in 2011
NEM operates through business units in
the Netherlands, Germany, US, Dubai and
Malaysia. The main office is in Leiden, the
Netherlands.
Gas analyzers aid efficiency at UK coal power plant
Servomex's world-leading expertise in monitoring combustion
gases has been recognized at the giant Drax facility
Zirconia technology measures oxygen on
a " wet " basis, meaning that there is no need
to condition the sample gas first; thick film
technology monitors CO levels to ±25 ppm.
Drax Power Station (above) and the
Servomex FluegasExact analyzer (right)
O
perator Drax Power has installed eight
SERVOTOUGH FluegasExact 2700 gas
analyzers from Servomex at its 3,960 MW
coal-fired power plant in Selby, UK. Drax is
the UK's cleanest and most coal-efficient
power plant, as well as the largest.
The FluegasExact is designed for temperatures
up to 1,750°C (3,182°F) in process
heaters, utility boilers, thermal crackers and
incinerators. It uses a zirconium oxide cell to
measure oxygen and a patented thick-film
catalytic sensor for combustibles.
104
With response times (T90) better than 20
seconds for O2 and 30 seconds for combustibles,
the combustion process can be closely
controlled and " breakthrough " detected
extremely rapidly.
Both sensors operate in a heated,
insulated sensor head installed in a single
low-flow extractive probe. Manufacturing to
the highest quality standards ensures exceptional
performance in tough environments
with the minimum of maintenance.
The installation has been a success, with
Drax engineers able to operate the combustion
process much closer to the optimum
air-fuel ratio. This has saved fuel, reduced
process downtime and further improved
emissions quality compared to a previous,
obsolete, analyzer installation.
Performance has been subsequently
improved by installing a new sulfur-resistant
combustibles sensor upgrade kit. This
improves the performance and longevity of
www.powermag.com
Servomex thick
film technology
in applications
where SO2 levels
exceed 1,000 ppm.
Servomex has also provided full service
and support including installation
and commissioning for the SERVOTOUGH
FluegasExact analyzers.
" The performance, accuracy and reliability
of the SERVOTOUGH FluegasExact has
established it as the industry choice for monitoring
combustion processes, so with this
installation Servomex is proud to actively
contribute to Drax's status as the UK's most
efficient coal-fired power station, " says Chris
Cottrell, Managing Director, Servomex.
" Servomex has been a pleasure to work
with and the contract was professionally
project managed with a flexible approach, "
concludes Peter Muff, Project Manager, Drax
Power.
POWER | May 2012
www.nem-group.com
www.servomex.com
http://www.nem-group.com http://www.servomex.com http://www.powermag.com
POWER May 2012

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