Chemical Stripping Lines
Turn Key supply of automated Chemical Stripping Lines to Land Based Gas Turbine Maintenance, Repair and Overhaul
Just like in aero engines, the blades and vanes in land-based gas turbines are protected by a metallic coating. After some time in service the coating has to be removed (=stripped) and reapplied. Galvatek supplies equipment for the removal of the metallic coating within the gas turbine maintenance process for power plants.
Case Alstom: Two stripping lines for land based gas turbine MRO
CompactLine for fast and easy installations
Due to the typical component size and maintenance volumes of gas turbines, Galvatek’s stripping plants are typically compact packages. CompactLines are delivered preassembled and tested at our manufacturer’s premises and brought to site ready to be installed, thereby minimising costs arising from disruption to production.
Coating dissolution, alkaline, rinsing and drying
Before entering the stripping line, gas turbine components are usually cleaned by grit blasting or a similar manual cleaning method.
The first step in the automated stripping line is dissolving the coating material using a heavy acidic solution, such as hydrochloric acid (HCI). After the acid process, the parts are rinsed to remove acid residues. Alkaline, typically caustic soda (NaOH) or similar, is then used to attack on reaction products. The alkaline process is followed by rinsing to remove alkaline residues. The final step is usually drying, which facilitates the inspection of components, or process sequence repetition if needed.
The typical number of process tanks is 1-3, which are supplemented with the above-mentioned rinsing and drying. The Candovent ventilation system and Galcont automation system make Galvatek´s stripping plants extremely environmental friendly, as well as easy and safe to use.
Stripping plant features
Galvatek’s MRO cleaning equipment as well as gas turbine stripping plants are individually scaled and designed for each application. For example, special equipment can be supplied for stripping the blade component only partially, leaving the rest of the blade untouched. Special ventilation equipment is included for treating highly corrosive fumes, as well as special bath circulation and filtration. The lengths of tanks for stripping plants are typically up to 2 meters, but larger tank sizes can also be supplied.
