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1. (WO2018022900) METHOD FOR DEWATERING COAL COMBUSTION RESIDUALS

Pub. No.:    WO/2018/022900    International Application No.:    PCT/US2017/044198
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jul 28 01:59:59 CEST 2017
IPC: E02D 3/10
Applicants: AECOM (DELAWARE CORPORATION)
Inventors: KOSLER, Steven
SEEGER, David
BIRD, George, Richard
Title: METHOD FOR DEWATERING COAL COMBUSTION RESIDUALS
Abstract:
Coal combustion residuals (CCR) are dewatered by installing prefabricated drains in a horizontal, generally co-planar pattern below the surface of the CCR with suction or a vacuum to withdraw water from the CCR down to the level of the prefabricated. Dewatering may be coupled with imparting vibrations to the material to further promote both additional dewatering and compaction of the CCR material. A suitably graded bottom ash, fly ash, sand or large-diameter-solid particle layer may be added on top of the horizontal drains to enhance dewatering of fine CCR material.