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siemens.com/energy/field-service-fossil
Ultrasonic cleaning and testing – for better performance and greater efficiencyAdditional offering available for your SGT5-4000F and SGT6-4000F premix and pilot gas burners
Answers for energy.
After cleaning, the burner components are stored,
ready for reassembly
Seal of qualityThe Siemens Field Service Seal
This seal, signifies that your burners have been expertly cleaned at Siemens according to our technical and quality assurance requirements. Our process for the chemical cleaning of burner components – designed to avoid damaging their surfaces – is described in detail in our pro-cedures, which are regularly updated to reflect our latest technical knowledge.
certifie
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rner
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ance
| BurnerClean |
Flow measurement1
Thermal pre-treatment2
Blow-out33
Drying8
Flow measurement9
Visual inspection10
Conservation11
End of cleaning
OK?
Rinsing5 Rinsing
Passivation6 Passivation
Blow-out77 Blow-out
Immersion cleaning44 Immersion cleaning
Yes No
Ideal burner cleaning sequence with dual-flow measurement
After the cleaning one machine showed improved operation Burner cleaning for SGT5-4000F and SGT6-4000F
What are the benefits of ultrasonic cleaning for premix and pilot gas burners?
Experience with our fleet of turbines with annular combustion chambers has shown that deposits can form on burners over time during operation depending on the fuel used and the ambient conditions. It can affect operating behavior in many ways, including:
■ Carbonization and sulfur deposits (hot/cold spots)
■ Combustion chamber instability
■ Power loss
■ Increased trips (emergency shutdowns).
We offer ultrasonic cleaning of the premix and pilot gas burners in combi-nation with dual-flow measurement. You can see what benefits the cleaning provides, and we can verify the success of this key service.
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„The benefits of Siemens
burner cleaning?
That’s easy – potential for
fewer trips and improved
operation.“Werner Brödner
Siemens Project Manager
On the left, the still uncleaned burner; on the right, the cleaned burner
looking almost like new
Burner cleaning and flow measurement go hand in handFor reliable results
Flow measurement for proven results
In our work process, considerable at-tention is paid to flow measurement before and after cleaning, because this is a key indicator of the effectiveness of the cleaning. It also provides a veri-fication that the cleaning process did not affect operation of your gas turbine. Our internal specifications define in detail the procedure for performing flow measurement.
Using flow measurement, we calculate the effective through flows and the deviation from the mean value of the entire burner set. This allows the cleaning process to be controlled to help prevent damage to the burner. Documentation of the measured values before and after the cleaning provides Siemens Service Engineering with important information for assess-ing the complex burner system as well as any service measures that may be recommended. Or would you rather rely solely on a visual inspection of the burners?
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“Our customers have reported
high satisfaction with the results
of burner cleaning. Flow measure-
ments before and after cleaning
demonstrate the effectiveness
of the process.”Thomas Wänger
Flow Measurement Specialist
Graph:The flow measurement
diagram showing the measurement before cleaning
Photos below: The endoscopic inspection
prior to cleaning reveals deposits that necessitate
a qualified cleaning process
An ideal way to prepare the burner for cleaning Heat treatment followed by blow-out
Thermal pre-treatment
Siemens’ experience with burner cleaning without thermal pretreatment is that it can in many cases yield less than desirable results. Siemens’ process for thermal pre-treatment for burner cleaning is designed to remove organic residues, especially from inside the components to be cleaned. These include residues of, for example, grease, oil, cooling lubricants, and con-servation agents as well as combustion residues – and elemental sulfur, which are often difficult or impossible to remove. The components are heated in a furnace and then, after a prescribed dwell time, they are cooled in a controlled process that can take several hours.
Blow-out
Especially in the case of operationally stressed components, loose particles may be present inside the components after thermal treatment has been performed. We remove these particles by blowing them out with compressed air in order to achieve faster results with the citric acid cleaning process described below.
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“With the thermal pre-treatment of
burners, we strive to optimize results
in the subsequent cleaning process.”Herbert Fandel
Burner Cleaning Specialist
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The burners are cleaned and rinsed in multiple cycles Immersion cleaning in the ultrasonic bath followed by rinsing
Immersion cleaning in citric-acid bath
The components are placed in the heated citric-acid bath. The cleaning effect of this bath is accelerated and intensified by means of ultrasonic waves of a particular frequency. We can vary the cleaning time according to the thickness and type of contamination. The citric-acid cleaning process can take up to several hours. On the basis of past experience, Siemens typically performs two cleaning cycles on operationally stressed components for maximum effectiveness. Results are also confirmed by post-cleaning flow measurement.
Rinsing
Following the citric-acid bath, the parts are rinsed wet-on-wet inside and out with water.
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Imm
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“Immersion cleaning supported by
ultrasound is essential for optimal
burner cleaning.”Marcus Goetze
Burner Cleaning Specialist
After immersion in the citric-acid bath, the burners
must be spray-washed in order to rinse off any
remaining acid
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A clean solution for outstanding quality Subsequent passivation, blow-out, and drying
Passivation
In order to help prevent rust, non-rustproof components are briefly passivated by immersion in a degreasing bath for a short time after rinsing.
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Blow-out
Partially dissolved particle layers can still remain inside the compo-nents after the acid treatment. These can then later detach in operation and impair the function of the components. For this reason, we perform another blow out with a compressed air device.
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Drying
Blowing out with com-pressed air helps remove remaining particles and dries the components, especially inside, to remove residual humidity which can affect the conservation process.
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dry
ing
Detailed photos show the burners in the
degreasing bath and during subsequent drying
“The sight of a clean burner –
almost like new and ready for
installation – gives me a feeling
of accomplishment every time!”Karsten Wegener
Site Manager
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Final quality controls to optimize effectivenessTesting and handover for installation
Visual inspection
We visually inspect the burner components for contamination externally and also internally using an endoscope and follow a rigorous process to disposition findings. If we ascertain that there are any large, loose particles still inside, we can draw on further treatment processes which have been approved by Siemens Service Engineering.
Conservation
Finally, we coat components made of non-rust-proof material by immersion in or spraying with a universal corrosion resistance agent.
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Graph:Uniform distribution of the
flow values is a sign of an excellent cleaning result
Photos on the right: The endoscopic inspection
after cleaning can verify the success of the
cleaning process
“Our cleaned burners have elicited
positive responses: many customers
have stated that the gas turbines ran
more quietly with fewer trips and
better performance.”Carsten Schmidt
IBS Engineer
Our goal: shortest outage times for the highest availability of your power plantSiemens Field Service worldwide
Qualified, committed, on-site – wherever you need us!
Siemens Field Service offers comprehensive services for complete power plant installations, gas power plants, steam turbine power plants, and generators. We work with state-of-the-art plant diagnosis and fault-detection systems as well as Siemens Service Engineering in order to improve efficiency, reduce emissions, and guarantee availability over the entire lifecycle of the power plants. With our strategically positioned branches in many countries of the world, we are always close to our customers so that we can implement project- and customer-specific field service solutions at any time.
Profit from the expertise and experience of an industry leader:
■ Manufacturer and specialist knowledge based on over 165 years of experience
■ Products and services from the OEM
■ Construction and commissioning of more than 50 new power plants annually
■ Inspections and maintenance annually – 200 gas power plants – 150 steam power plants – 50 conventional islands
Sie
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Fie
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erv
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Global presence
■ Locally in more than 190 countries
■ 290 production sites and factories in more than 40 countries
■ 19 field service branches world-wide close to our customers
■ Over 1,500 qualified field service engineers and technicians world-wide
Fast, confidential, flexible:
■ 24/7 telephone hotline for emergencies or issue resolution with your plant
Expert knowledge and know-how through continuous qualification
■ Over 2,000 field service employees
■ Over 100 subcontractors worldwide
■ 100 customer training courses annually
High quality standards
■ Prepared more than 200 project plans annually
■ Integrated quality management system, certified to DIN IS0 9001
Our Field Service worldwide works intensively together
with specialists, subsuppliers and customers – back to grid
as soon as possible
Printed on elementary chlorine-free bleached paper.
All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners.
Subject to change without prior notice.
The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.
Published by and copyright © 2013: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany
Siemens Energy, Inc. 4400 Alafaya Trail Orlando, FL 32826-2399, USA
Energy Service Division Service Fossil Field Service Marketing Region Europe Huttenstr. 12 10553 Berlin, Germany E-mail: [email protected]
For more information, please contact our Customer Support Center. Phone: +49 180/524 70 00 Fax: +49 180/524 24 71 (Charges depending on provider)
E-mail: [email protected]
Energy Service Division Order No. E50001-G520-A481-X-4A00 | Printed in Germany | Dispo 34805 | c4bs No. 7816 | TH 258-130138 | BR | 461500 | WS | 07131.5