NOZZLE SCREEN FOR DRYER AND METHOD OF ITS OPERATION Russian patent published in 2015 - IPC F26B3/08 F26B17/10 

FIELD: heating, drying.

SUBSTANCE: present invention relates to a nozzle screen (14) and to method of its operation. The nozzle screen (14) for the dryer for drying of solid particles contains at least one segment (20) of the nozzle screen which has the set of the first nozzles (15a) and the set of the second nozzles (15b), while the first and second nozzles are distributed along the whole surface of the segment (20) of the nozzle screen, and the fluidising medium can supplied into the first and second nozzles independently from each other. The segment (20) of the nozzle screen has a set of nozzle straps which pass, in essence, parallel to each other and on which in each case the first and second nozzles are located, while the lattice contains the first nozzle channel passing in the nozzle strap into which the first nozzles (15a), and the second nozzle channel are open; the second nozzle channel passes parallel to the first nozzle canal into which the second nozzles (15b) are open. The respective volume flow can be switched on, off or controlled. The first nozzles (15a) and the second nozzles (15b) are evenly distributed along the whole surface of the nozzle screen.

EFFECT: homogenous fluidised layer in the dryer is obtained, no matter whether only one group (15a or 15b) of nozzles or all nozzles are operating.

17 cl, 9 dwg