Development and field demonstration of a controlled cavitation erosion (CONCAVER) descaling system for industrial boiler tubes

The design, operation and performance of the CONCAVER, a device which uses high pressure water ejected from a rotating or stationary nozzle to clean and descale the inside of industrial boiler tubes, are discussed in detail. This descaler and its associated equipment has been field tested. The results showed that 8000 psi pressure is required to remove scale from the boiler tubes, rotating nozzles result in the best cleaning of tubes with greater than 1 1/2 in.-dia. and the cleaning time is 40% faster than with conventional cleaning methods. (LCL) a