METHOD OF PROCESSING DOMESTIC WASTES IN FUEL BRIQUETTES Russian patent published in 2013 - IPC C05F3/06 A01C3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to sizing the domestic wastes into fuel briquettes. Proposed method comprises stock pre-grinding, its separation and mixing with fillers in forced-type mixer to produce homogeneous bulk. pre-grinding is executed by cutter-type grinder to particle size of 20-30 mm and, then, by brush grinder to particle size of under 6 mm. Note here that separate inclusions sized to 10-15 mm in amount of 10% of total bulk are permitted. Then, obtained pulp is fed to mixer for mixing with water, binders and wastes of fuel or food oils properly proportioned in amount of 5-6% of the pulp. Average moisture content in resultant pulp may not exceed 25-55%. Prepared pulp is fed after mixing into accumulation bin to be kept there in for 2-3 hours and, further, via bin proportioner it is fed by conveyor or manually by shovel into extruder loading cone. Pulp is homogenised, compacted and extruded at 150-200 kg/cm² in extruder carrier. In extrusion, some portion of moisture is squeezed off in interflange gap of extruder carrier and housing to allow outlet extruded briquette moisture content 5-7% smaller than that of initial stock. Briquettes are dried at 50-60°C for not over 40-90 minutes at intensive hot air blowing or at good sunny weather on exposed rain-protected sites.

EFFECT: simplified briquetting.

3 cl, 3 dwg