(57) A no-moving parts pulverizer (19) and classifier system (15) reduces materials to
one hundred fifty microns to less than ten microns using superheated steam or any
gas capable of being compressed and expanded thru machined orifices. The resultant
size reduction depends upon the classifier gas rate and pressure, the pulverizer gas
rate and its pressure. These combinations control and regulate miximum particle size,
average particle size and the mix of gas and solids in process.
The feedstock enters the classifier chamber (15) by auger (12) or similar manner as
long as the feeder maintains a positive seal. The classifier chamber (15) separates
the feedstock by size and particles of a predetermined size exit (32) the system in
a specific ratio of gas and solids. The feedstock larger than specified exit the base
of the classifier (15), split into two equal streams (20A, 20B) and accelerate thru
the pulverizer (19). The reduced feedstock exits (13) the pulverizer (19), mixes with
incocming feedstock (10) and again enters the classifier (15).
The system is controlled using pressure, temperature, feedrate or any combination
of the three. Other control methods can be used if any one of the three are part of
the control circuit.
|
|
