FIELD: building engineering. SUBSTANCE: device has a reservoir with a driving vertical shaft disposed in it. The shaft has a high-speed paddle and a slow-moving frame stirrers. On the bars of the frame stirrer the turbulators are mounted radially at the distance of h2= (0,1-0,2)H, where H - the level of the reservoir filling. The paddle stirrer is disposed at the distance of h1= (0,4-0,6)H. EFFECT: enhanced efficiency. 1 cl, 2 dwg
