WIRBELBETTOFEN MIT INNERER UMWAELZUNG UND VERFAHREN ZUR STEUERUNG DESSELBEN.

摘要

Above the portion of an air distributing plate from which the air having a higher mass velocity is ejected is provided an inclined partition wall which is adapted to intercept an upward flow of the fluidisation air ejected from this air ejection portion. It turns this upward flow of the air toward the position above the portion of the air distributing plate from which a gas having a low mass velocity is ejected, with a heat recovery chamber formed between the inclined partition wall and a furnace wall. The inclined partition wall is formed to have an angle of inclination of 10-60 deg. w.r.t a horizontal plane, and a horizontal projection length of 1/6-1/2 of the horizontal length of the furnace bottom. The method of controlling this fluidised bed boiler consists of controlling the quantity of heat recovered from the heat recovery chamber in compliance with the request by the users of recovered heat by suitably regulating the flow rate of the air ejected from a diffuser for the heat recovery chamber. The reed rate of the fuel supplied to the fluidised bed primary combustion chamber is controlled on the basis of the temp. of the fluidised bed primary combustion chamber.