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Foam Cleaning Process for Steam & Gas Turbine
Transcript of Foam Cleaning Process for Steam & Gas Turbine
Chemical foam cleaning of steam and gas turbines and other rotating equipment
! No disassembly of turbine required
! A proven process designed to remove deposits from steam path components using foam to deliver the required chemicals
! Cleaning (chemical proces) is completed in 24 hrs or less
! Industrial Steam Turbines (most common deposits: various salts)
! For Combustion Turbines (deposits vary widely).
! For Large steam turbine (most common: copper oxide/Iron oxide build-up, salts)
What is Foam Cleaning of Steam Turbines?
What is Foam Cleaning for?
Effects of deposits on turbine blades:
Benefits of Foaming Turbines
Foam Cleaning Time TableFoam consystency
Typical source & cause for copper deposits
Chemical removal of deposits from turbine rotors
• Affects the flow across the surface• Reduces blades efficiency resulting in overall
turbine efficiency drop, pressure build up etc.
• Increases the surface area
• Blades are of an airfoil design for efficiency• Deposits change the shape of the blade
• Set up/Chemical prep (during cool down)
• Chemical cleaning (5 hrs)
• Saturated steam rinse (12 hrs)
• Trial Foam Test (1 hr)
• Foamed water rinse (2 hrs)
• Normalize turbine for operation (16 hrs)
• Turbine cool down (60 hrs)
• Total 96 Hrs
• More effective than other methods
• Leaves blades clean and smooth• Does not remove base metal
• Less costly than other mechanical methods
• Immediate results• Short payback period
• No disassembly required• Quick & Easy
• Surface Condenser (air-in leakage)• Corrosion of copper alloy tubes
• Drum liner cracks
• HP & LP feed water heaters• Stored in Primary Superheater Tubes
• De-superheat spray
• Carry over with steam during unstable conditions (during start up)
Results of foam cleaning process
Chemical removal of deposits from turbine rotors
10,0010,2510,5010,7511,0011,2511,5011,7512,0012,2512,5012,7513,0013,2513,5013,7514,0014,2514,5014,7515,0015,2515,50
800 850 900 950 1000 1050 1100 1150 1200Live steam flow F [t/h]
u Before foamcleaning
n After foamcleaning
Pressure in reg. wheel chamber in 370MW BBC/Alstom steam turbine
before and after cleaning
Pressure limit 15,2 MPa
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industrial vacuuming in explosive atmosphere zones
servicing involving industrial rope access
fuel and utilities management
ultrasound measurement
lubrication management
IT systems supporting maintenance
thermovision
oil service in machines and storage tanks
waste management
delivery of lubricants and lubrication systems
oil exchange, lubrication of machinery
oil diagnostics
machinery diagnostics
consultancy
training
refurbishments of oil systems and lubrication installations
lubrication service and machinery diagnostics
industrial facility
high-pressure cleaning of industrial installations
and instruments with water at high-pressure (up to 3000 bar)
chemical removal of deposits from the rotors of the turbines
and rotating machinery
hydrodynamic cleaning and flushing of oil systems
of machines
refurbishment service
decontamination of petrochemical
and refinery installations
explosive cleaning
chemical cleaning
years of complex
industrial service by Ecol Group
Ecol Industrial s.r.o.www.ecolindustrial.cz
Contact person:
Tomáš Klímatel.: +420 317 842 227
mobile: +420 774 663 320email: [email protected]
contact:
EN.09.2018