Patent ID: 8298304
Filing Date: 2012-10-30
Classification: C10L,F23K

Abstract:
1. A coal treatment process applying a coal-beneficiation process module for a coal-fired power plant having a furnace, comprising the steps of: a. pulverizing raw coal containing water, non-combustible ash, mercury and oil through a coal mill with a first inert sweep gas to form a solid-gaseous mixture that includes a powdered coal containing a residual water, said mercury and oil that is mixed with said non-combustible ash and said first inert sweep gas containing a water vapor at a location of said coal-fired power plant; b. transferring said solid-gaseous mixture into said coal-beneficiation process module, where said process module comprising the steps of: c. burning said cleaned powdered coal-char inside of said furnace in the presence of a hot combustion air, wherein said coal-char burning generates heat, controllable pollutant emission, and a hot inert flue gas in said furnace, and said generated heat is used to heat water in a process to produce electricity; and d. said hot inert flue gas is divided into first and second streams, said first stream of said hot inert flue gas is transferred to an external sweep gas generator, said second stream of said hot inert flue gas is transferred to a heat exchanger of said furnace thereby creating a cold inert flue gas that is further transferred to said external sweep gas generator, said hot inert flue gas and said cold inert flue gas are mixed inside of said external sweep gas generator wherein a ratio of mixing said hot and cold inert flue gases is controlled to generate said first, second, third and fourth inert sweep gases being identical and having a controllable temperature that are applied in said coal-beneficiation process module.