FLUIDISED BED THERMIC FLUID HEATER WITH THERMIC FLUID INBED HEAT EXCHANGER

摘要

A fluidized bed combustion system comprising a first section having an inlet for a stream of gas introduced into a second section through a grid that supports a bed of solid particles fluidized by the introduction of the gas, the second section being disposed above the first section and being provided with an inlet for feeding a solid fuel and with one or more heat exchanger tube(s) disposed in spaced-apart adjacent relationship with the fluidized bed, the tube(s) conveying thermic fluid in heat exchange relationship with the combustion zone, at least one portion of the tube(s), extending into a third section disposed above the second section, conveying thermic fluid in heat exchange relationship with the combustion flue gases, the flue gases being directed to a stack through a duct having a pollution control equipment installed therein. This invention also relates to a method for acquiring heat generated during combustion in the fluidized bed combustion system.