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(11) | EP 0 122 112 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Improvements in or relating to a process and apparatus for spraying a powder with liquid |
(57) The process includes entraining a powder having an average particle size in the range
of 1 micron to 1.0 mm in air within a mixing vessel and spraying the entrained powder
with a liquid within a spray zone in the mixing vessel. The process is used especially
for a throughput rate in the range of 20 to 100 kg/ hour of powder. The apparatus
for carrying out the process includes a mixing vessel (2) accommodating an axially
aligned venturi device (22) and a spray nozzle (18). The mixing vessel (2) may be
connected to a vibratory fluidized bed chamber (28) for collecting the sprayed powder. |