Apparatus for and method for accelerating fluidized particulate matter
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United States of America Patent
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Jul 14, 1998
Issued Date -
N/A
app pub date -
Aug 29, 1996
filing date -
Mar 1, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fluid jet accelerator/pressurizer apparatus for accelerating and pressurizing a fluidized stream of particulate matter, e.g. for ice blasting, has a nozzle housing defining a main conduit, forming a passage for the flow of the fluidized stream through the nozzle housing. The main conduit has a constriction formed by a convergent-divergent region of the main conduit for effecting acceleration of the fluidized stream, and an inner blast nozzle is provided in the main conduit and directed in a downstream direction towards the constriction. In operation, a blast medium is discharged from the inner blast nozzle at a speed sufficient to form within the fluidized stream a flow front which is impenetrable by the fluidized stream and which co-operates with the constriction to accelerate the fluidized stream.
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