초록 ▼

A gasification/combustion system (10) for the gasification/combustion of non-gaseous fuels with single or combinable oxidants and sulphur sorbants is described. The system (10) includes a rotary fluidized bed gasifier (12) for gasifying a non-gaseous fuel, the outlet of the gasifier (12) being conne

A gasification/combustion system (10) for the gasification/combustion of non-gaseous fuels with single or combinable oxidants and sulphur sorbants is described. The system (10) includes a rotary fluidized bed gasifier (12) for gasifying a non-gaseous fuel, the outlet of the gasifier (12) being connected to a gas turbine (14) through gas cleaners (46,50) for removing particles from the fuel gas, and an afterburner (16) for burning off the fuel gas to produce combustion gases for supply to a gas turbine (14). The system (10) also includes a steam cooling circuit which is provided to cool the fuel gas flow through system (10) and which includes a steam turbine (26). Embodiments of the system (10) are described with accompanying drawings.

대표청구항 ▼

A gasifier for use in a gasification system, said gasifier having fuel inlet means for being coupled to a non-gaseous fuel source and outlet means for providing fuel to a gasification location an annular fluidised bed for retaining particles of fuel to be combusted, said bed being disposed in an ann

A gasifier for use in a gasification system, said gasifier having fuel inlet means for being coupled to a non-gaseous fuel source and outlet means for providing fuel to a gasification location an annular fluidised bed for retaining particles of fuel to be combusted, said bed being disposed in an annular plenum chamber, a cylindrical outlet chamber disposed radially inwardly of said fluidised bed and in communication with said outlet means, said cylindrical outlet chamber having a base, a central shaft to which said fluidised bed is coupled, said central shaft having an axis of rotation, said fluidised bed being rotatable about said axis of rotation of said central shaft to generate a centrifugal force which acts on the particles to be combusted, said annular plenum chamber having oxidant inlet means for receiving an oxidant in a direction opposite to the direction of said centrifugal force whereby, in operation, particles to be gasified are retained in equilibrium in said fluidised bed, and rotation of said fluidised bed produces a fuel gas vortex travelling towards said outlet means in said outlet chamber, said outlet chamber having re-entrant wall reflector means for reflecting said fuel gas vortex in a direction away from said outlet means and central reflection mean disposed in said base for reflecting said fuel gas vortex to said outlet means, said wall reflector means and said central reflector means being provided to increase the residence time of particles in said gasifier and maximise the combustion and carbon conversion of said fuel particles.