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US 10,118,182 B2Granted
Incineration byproduct processing and methods
AssigneePure Recovery Group, L.P.
InventorJohn Vandemierden
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Abstract
Methods and systems for processing incineration byproduct from waste incinerators, ash purification and recovery of materials and metals. High levels of aggregate and metals recovery and ash purification are achieved for residual ash with reduced environmental contaminants.
Claims20
A method of processing incineration byproduct to obtain particles of unburned material, aggregate sand and ash, the process comprising the steps of:
- (a) receiving incineration byproduct and passing the incineration byproduct through a screen and separating particles having a dimension greater than approximately three inches from the incineration byproduct;
- (b) transferring the incineration byproduct to a wash plant equipped to hold water and the incineration byproduct;
- (c) mixing water with the incineration byproduct in the wash plant;
- (d) separating additional particles from the incineration byproduct in the wash plant, the additional particles having a dimension greater than approximately six mesh;
- (e) discharging the additional particles from the wash plant;
- (f) transferring incineration byproduct mixed with water from the wash plant to a thickener and separating ash from the water in the thickener as ash sludge discharged from the thickener and adjusting the pH of the water prior to discharge, and
- (g) dewatering the ash sludge discharged from the thickener to produce ash cake.
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Dependencies are inferred from the claim text.