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

Pre

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el ch

em

be

r P

[M

Pa

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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: tomas.klima@ecol.com.pl

contact:

EN.09.2018