Method of and apparatus for generating a hot gas
AssigneeCoal Industry (Patents) Limited
InventorJohn Highley
Life of this patent
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Abstract
A hot gas is generated by passing the gas to be heated through a fluidized heating bed to fluidize the bed and to receive heat from the bed to which hot bed material is circulated from an adjacent fluidized combustion bed. An intermediate combustion bed may be interposed between the heating and combustion beds to burn any burnt matter prior to its passage to the heating bed thereby avoiding or reducing contamination of the gas to be heated.
Claims8
A method of generating a hot gas including the steps of forming a first fluidised bed of particulate material, introducing a fuel into the first bed, burning the fuel in the first bed to generate heat, forming a second fluidised bed of particulate material, passing a gas to be heated through the second bed, and circulating heat conductive particulate material between the first and second beds to heat the second bed to transfer heat to the gas passing therethrough thereby to generate a hot gas.
Apparatus for generating a hot gas including a generator body, a first fluidised bed combustion zone within the body, a fuel inlet to said combustion zone, a fluidising medium inlet and a gas outlet for the first zone, a second fluidised bed heating zone within the body, a gas inlet and a gas outlet for the second zone, an intermediate fluidised bed combustion zone provided within the generator body interposed between the first and second zones, and means for circulating material between the first and second zones.
Dependencies are inferred from the claim text.