Spray nozzle for a spray dryer

Claim 1

A spray nozzle for a spray dryer, the nozzle having an upper part provided with a feed pipe for the supply of a solution to be sprayed, and with feed pipes for the supply of a spray-inducing means; and a nozzle head comprised of a plurality of ring-shaped members arranged concentrically with respect to each other so as to leave an inner annular passageway, an outer annular passageway and an intermediate annular passageway therebetween, the said nozzle comprising a base plate of hard-elastic and rigid material and an intermediate plate, both positioned between the upper part of the nozzle and the nozzle head and being detachably secured together; a plurality of feed pipes which are parallel with respect to the axis of the nozzle and arranged in a cage formation so as to form the outer boundary line of the upper part of the nozzle, and of which the ends are fast with base plate, the said feed pipes introducing the spray-inducing medium into the outer annular passageway; inner feed pipe being disposed on the axis of the nozzle and being connected to introduce sprayinducing medium into inner annular passageway, ring-shaped members, forming the nozzle head, being detachably secured to the intermediate plate; a fastener supporting the inner-most ringshaped member by means of a bearing disc; annular channel disposed about inner feed pipe and connected to supply the solution being sprayed to intermediate annular passageway, an inlet conduit being connected to the annular channel, an axial compensator being radially spaced from inner feed pipe and being positioned between the wall of said feed pipe and the inlet conduit on the outer wall of annular channel for the supply of the solution to be sprayed; the spray-inducing means being supplied Through the inner annular passageway and the outer annular passageway and the solution to be sprayed being supplied through the intermediate annular passageway in the nozzle head.