| abstract |
A microchannel double pipe device comprises a channel for inner nozzle ( 4 ), a channel for outer nozzle ( 5 ) and a mechanical probe ( 8 ). The channel for outer nozzle ( 5 ) concentrically surrounds the channel for inner nozzle ( 4 ), and the channel for inner nozzle ( 4 ) concentrically surrounds the mechanical probe ( 8 ). Constricted at the outlet of the channel for inner nozzle ( 4 ), the channel for inner nozzle ( 4 ) extends to form an inner nozzle core ( 9 ). Constricted at the outlet of the channel for outer nozzle ( 5 ), the channel for outer nozzle ( 5 ) extends to form an outer nozzle core ( 10 ). The outer nozzle core ( 10 ) essentially concentrically surrounds the inner nozzle core ( 9 ), and the outlets of the inner nozzle core ( 9 ) and the outer nozzle core ( 10 ) are at the same level essentially. The mechanical probe ( 8 ) is configured to intermittently empty the inner nozzle core ( 9 ). The device can be used for microcosmic mixing and reaction, especially suitable for continuous preparation of inorganic, organic or medicine particles with nanostructure or micron-structure using liquid-liquid precipitation method. |