SYSTEM AND METHOD FOR IMPROVED HYDROTHERMAL UPGRADING OF CARBONACEOUS MATERIAL

摘要

Methods and apparatus are arranged to increase thermal efficiency, reduce waste water treatment, reduce net usage of fresh water, and improve operational reliability during direct hydrothermal upgrading of carbonaceous materials, including low-rank coals. Drain water collected from the hydrothermal upgrading system is passed through a reboiler system to generate steam which can be returned to the hydrothermal processor system for use therein.