FIELD: building and other industries, particularly treatment and cleaning devices for building wall facing. SUBSTANCE: device has cylindrical body with inner cavity concentrically divided by main diaphragm into the first annular chamber and the second, combustion, chamber. The first chamber is used for gaseous oxidizer preheating and supply. Combustion chamber is located inside the first chamber. Main diaphragm has through radial orifices. Pre-combustion chamber located coaxially with combustion chamber communicates with combustion through swirler, which swirls mixture of liquid fuel and gaseous oxidizer. Swirler has channels located around a circle and inclined towards body central axis. Tubular heat-exchanger is arranged along combustion chamber and pre-combustion chamber axis for dynamic heating and supply of particulate abrasive together with working gas flow to nozzle diffuser. Front end of nozzle contraction is connected to down-flow combustion chamber end defined by flow direction of gaseous combustion products and mixture of particulate abrasive with working gas. Combustion chamber has additional diaphragm which divides combustion chamber into main and supplementary areas. Additional swirler is installed between rear end of rear distribution annular collector part and outer additional diaphragm surface. Additional swirler communicates with the first annular chamber and pre-combustion chamber. Main area of combustion chamber has additional swirler concatenated with main swirler. The first annular chamber has registers arranged in series on outer surface thereof. Gaseous oxidizer is fed under pressure from body collector in the first chamber and pre-combustion chamber. Liquid fuel is supplied to pre-combustion chamber through nipple having shutoff valve. Nipple is connected to collector. EFFECT: increased speed of surface treatment, reduced flow rate of liquid fuel, possibility of controlling of treatment speed and fuel flow rate. 5 cl, 7 dwg
