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US 7,081,171 B1Granted
Screenings washer
AssigneeJWC Environmental
InventorsRob T. Sabol, John W. Schatzlein
Life of this patent
Estimating the term…
Abstract
A screenings washer having a hopper, a grinder downstream of the hopper, and a washer downstream of the grinder. The washer includes an auger rotor that receives the screenings ground by the grinder, a spray wash system that sprays a wash fluid directly onto a portion of said auger rotor and the ground screenings, a perforated trough, and tubular casing directly coupled to the discharge end of said auger rotor and having a severe bend proximate to the discharge end of said auger rotor. The severe bend partially obstructing transportation of the ground screenings transported by said auger rotor so as form a compaction zone that compacts and de-waters the ground screenings.
Claims10
A method of processing screenings using a screenings washer having a hopper;
- a grinder coupled to the hopper downstream of the hopper;
- and a washer coupled to the grinder downstream of the grinder;
- wherein the washer includes an auger rotor that rotates about an auger rotor axis, a spray wash system, a perforated trough disposed at a bottom of said auger rotor, and a tubular casing directly coupled to a discharge end of said auger rotor, the tubular casing having a severe bend proximate to the discharge end of said auger rotor;
- said method comprising:
- (1) feeding the screenings into the hopper for conveyance directly to the grinder;
- (2) grinding the screenings in the grinder to produce ground screenings;
- (3) feeding the ground screenings directly to the auger rotor;
- (4) washing the ground screenings in the auger rotor by spraying a wash fluid under pressure directly onto a portion of the auger rotor and the ground screenings and operating the auger rotor in a forward sequence, in which the auger rotor rotates in a direction that transports the ground screenings towards the discharge end of the auger rotor;
- (5) transporting the ground screenings by the auger rotor directly to the severe bend;
- and
- (6) compacting and de-watering the ground screenings by forcing the ground screenings through the severe bend which partially obstructs transportation of the ground screenings therethrough.
8 more elements
A method of processing screenings using a screenings washer having a hopper;
- a grinder coupled to the hopper downstream of the hopper;
- and a washer coupled to the grinder downstream of the grinder;
- wherein the washer includes an auger rotor that rotates about an auger rotor axis, a spray wash system, a perforated trough disposed at a bottom of said auger rotor, and a tubular casing directly coupled to a discharge end of said auger rotor, the tubular casing having a severe bend proximate to the discharge end of said auger rotor;
- said method comprising:
- (1) feeding the screenings into the hopper for conveyance to the grinder;
- (2) grinding the screenings in the grinder to produce ground screenings;
- (3) feeding the ground screenings directly to the auger rotor;
- (4) washing the ground screenings in the auger rotor by spraying a wash fluid under pressure directly onto a portion of the auger rotor and the ground screenings and operating the auger rotor in a forward sequence, in which the auger rotor rotates in a direction that transports the ground screenings towards the discharge end of the auger rotor;
- (5) transporting the ground screenings by the auger rotor directly to the severe bend;
- and
- (6) compacting and de-watering the ground screenings by forcing the ground screenings through the severe bend which partially obstructs transportation of the ground screenings therethrough, and further comprising:
- monitoring at least one of a current and a voltage corresponding to a power consumption of the screenings washer;
- and, when the power consumption exceeds a maximum allowable threshold value, setting a run sequence of the auger rotor to the forward sequence only, in which the auger rotor only rotates in a direction that transports the ground screenings towards the discharge end, and wherein
- when the power consumption exceeds a maximum allowable threshold value, the control unit causes the spray wash system to spray wash fluid onto the auger rotor.
11 more elements
A method of processing screenings using a screenings washer having a hopper;
- a grinder coupled to the hopper downstream of the hopper, the grinder comprising two or more counter-rotating shafts with intermeshing cutters;
- and a washer coupled to the grinder downstream of the grinder;
- wherein the washer includes an auger rotor that rotates about an auger rotor axis, a spray wash system, a perforated trough disposed at a bottom of said auger rotor, and a tubular casing directly coupled to a discharge end of said auger rotor, the tubular casing having a severe bend proximate to the discharge end of said auger rotor;
- said method comprising:
- (1) feeding the screenings into the hopper for conveyance to the grinder;
- (2) grinding the screenings between the counter-rotating shafts with intermeshing cutters, to produce ground screenings;
- (3) feeding the ground screenings directly to the auger rotor;
- (4) washing the ground screenings in the auger rotor by spraying a wash fluid under pressure directly onto a portion of the auger rotor and the ground screenings and operating the auger rotor in a forward sequence, in which the auger rotor rotates in a direction that transports the ground screenings towards the discharge end of the auger rotor;
- (5) transporting the ground screenings by the auger rotor directly to the severe bend;
- and
- (6) compacting and de-watering the ground screenings by forcing the ground screenings through the severe bend which partially obstructs transportation of the ground screenings therethrough.
8 more elements
Dependencies are inferred from the claim text.