公开(公告)号：EP2680978A1

公开(公告)日：2014-01-08

申请号：EP11707571.3

申请日：2011-02-28

Applicant: GEA Process Engineering A/S

Inventor： SØRENSEN, Per Bo ,  JENSEN, Anders Bo ,  FREDSTED, Søren

IPC: B05B7/06 ,  B05B7/10 ,  B01J2/04

CPC classification number: B01D1/18 ,  B01J2/02 ,  B01J2/04 ,  B05B7/06 ,  B05B7/062 ,  B05B7/066 ,  B05B7/10 ,  B22F9/08 ,  B22F9/082 ,  F26B3/12

Abstract: Disclosed herein is an external mixing pressurized two-fluid nozzle for atomising a liquid by means of liquid pressure and gas, comprising an inner feed liquid pipe (1) extending axially between an upstream end and a downstream end, having a feed liquid conduit (2), a feed liquid inlet (3) positioned at the upstream end and a feed orifice (4) positioned at the downstream end, and a co-axial first gas pipe (5) extending radially outside the inner feed liquid pipe (1) and forming a first gas conduit (6) between the first gas pipe (5) and the inner feed liquid pipe (1), the first gas pipe (5) having a gas outlet slit (7) positioned at the downstream end. Said external mixing two-fluid nozzle provides a swirling motion of the gas, which combined with a pressurized feed liquid enables the production of spray dried powder at industrially applicable capacities with low energy consumption and a small particle size.