Fluidized bed coal gasification reactor with two fluidized beds housed in a common pressure vessel to increase through put

摘要

An improved pressurized fluidized bed gasification reactor adaptable, in particular in a coal based combined cycle power plant, comprising; - one free board zone (14) acting as a common zone provided with a gas outlet (15); - a fluidized bed reactor zone (13) having atleast one fluidizing gas plenum (16) for entry of fluidizing media; - atleast one ash removal pipe (17) flowably connected at one end with the reactor zone (13), the other end leading to a bottom ash discharge port (18); - atleast one coal inlet (21) for provision of coal into the reactor zone (13), characterized in mat the fluidized bed reactor zone (13) is configured as atleast two separate reaction zones (13", 13") having identical internal diameter to correspond together the cross-sectional area of the un-separated reactor zone (05), and in that a separating member (19) is disposed between the atleast two separate reaction zones (13", 13"), the separating member (19) being provided with a transfer port (20) so as to maintain a continuous inter-transfer of bed material and gaseous reactants between the atleast two separate reactor zones (13", 13").