FIELD: circulating fluidized-bed boilers. SUBSTANCE: device has set of separators made in the form of tubes installed immediately adjacent to each other and distributed along horizontal gas flow being cleaned. According to one option of invention, fluid medium leaving hydraulic circulating system is passed from admission hole of first tube of first separator through all tubes of all separators of particular row to outlet hole of second front vertical tube of last separator in particular row and returns to hydraulic circulating system. According to other option, fluid is passed through all separators of particular row in parallel circuit which is attained by using inlet and outlet headers. Bars may be of any length which does not influence their length. EFFECT: simplified design, facilitated operation and maintenance, improved repairability of device. 20 cl, 10 dwg
