Method for cleaning/scraping and apparatus therefor

摘要

A water pump (2) is connected to a mixer (4) so as to blast high pressure water at a high speed in the mixer (4). The air and powder are supplied to the blast flow of the high pressure water through an air supply pipe (9) and a powder supply pipe (14) respectively so that a mixture flow composed of the gas, the droplet-like fluid, and powder is formed. The mixture flow is blasted from a nozzle (15) at a high speed so as to be sprayed onto a surface to be treated. Thus, impact actions held by the powder and the droplet-like fluid as cleansing/scraping media are given to the surface to be treated. Thus, a cleansing/scraping operation is achieved. Then, if the fluid, gas or the like supplied to the mixer (4) is heated, the cleansing/scraping operation can be further accelerated. <IMAGE>