Control of temperature of bed in fluidized bed combustion boiler

Abstract

Abstract PURPOSE: To maintain a temperature of a fluidized bed constant or within a proper range in spite of an operating condition by a method wherein a height of the fluidized bed in a furnace is controlled by increasing or decreasing an amount of an operating medium in accordance with the temperature of the fluidized bed. CONSTITUTION: Dust being arrested by a dust collector 2 at an outlet side of a boiler main body 1 during operation of the fluidized bed combustion boiler, is retrieved into a hopper 3 and is recirculated into a fluidized bed 6 properly through a pipe 5 by regulating an opening of a control vane 4. A height of the fluidized bed is controlled by recirculating the dust also into the fluidized bed 6 through another pipe 7 with transporting air. In this case, the control of opening and closing of the control vane 4 is effected through a controller (not depicted in the diagram) in accordance with a temperature of the fluidized bed. In another embodiment, the height of the fluidized bed fluidized bed is controlled in accordance with the temperature of the fluidized bed 6 by opening or closing necessary valves among the valves 9 for a plurality of discharging pipes 8 connected to the boiler main body 1 with an inclination and thus the temperature in the fluidized bed may be kept within a proper range. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Tomoaki Takada

Bibliographic Details