METHOD FOR PROCESSING DEWATERED SLUDGE OF WASTE WATER TREATMENT PLANTS TO FUEL BRIQUETTES SHAPED AS CYLINDERS Russian patent published in 2014 - IPC C10L5/06 C10L5/16 C10L5/44 C10L5/46 

FIELD: oil and gas industry.

SUBSTANCE: method for processing dewatered sludge of waste water treatment plants to fuel briquettes shaped as cylinders includes dosing and mixing of solid components and sludge produced by waste water treatment plants in mixer, formation of mixture and subsequent drying of briquette-shaped fuel; it is distinguished by delivery of prepared and mixed in mixer mass to special-purpose rotary-pulsing apparatus where mixture under pressure of 15-20 MPa is subjected to mechanical activation, homogenisation and restructuring; then it is hold within 2-3 hours, thereafter it is enriched by oil sludge and fed to moulding extruder; at that sludge of waste water treatment plants with water content of 55-25 % by weight is used; briquettes are dried at 70÷80°C during 30÷50 minutes or at room temperature during 2÷3 days till it reaches humidity of 17÷22%; at that shaped fuel contains the following components, by wt %: - fine solid components containing wooden and raw plant material, peat, coal slack - 40-70%, oil sludge - 5-6%, sludge of waste water treatment plants - remaining part.

EFFECT: produced fuel has high mechanical strength that allows reducing costs for its storage, loading, unloading and transportation.

1 cl, 1 dwg, 1 tbl, 6 ex