HORIZONTAL TYPE CIRCULATING FLUIDIZED BED BOILER WITH HORIZONTAL CYCLONE SEPARATOR

摘要

A horizontal type circulating fluidized bed boiler with a horizontal cyclone separator comprises a main combustion chamber, a secondary combustion chamber (6), a burnout chamber (7) and a tail gas flue (11). A horizontal cyclone separator (25) is provided in the burnout chamber (7). An outer cylinder of the horizontal cyclone separator (25) is defined by a separator spacer (8), a burnout chamber rear water-cooled wall (23) and a burnout chamber side water-cooled wall (24). The separator spacer (8) is formed by a separator upper circular-arc section (81), a separator spacer lower vertical section (26) and a separator spacer inclined section (28). A middle cylinder (9) of the horizontal cyclone separator is inserted into the burnout chamber (7) from two sides or one side of the burnout chamber side water-cooled wall (24). The separator spacer lower vertical section (26), the burnout chamber rear water-cooled wall (23) and the burnout chamber side water-cooled wall (24) define a material returning channel (27). An aeration air nozzle (17) is provided at a lower part of the burnout chamber rear water-cooled wall (23). A V-shaped ash hopper wall (32), a material chute baffle plate (29), the separator spacer inclined section (28) and the burnout chamber side water-cooled wall (24) define a material chute (18). The aeration air nozzle (17) and the material chute (18) face each other in line arrangement. The horizontal type circulating fluidized bed boiler is particularly suitable for fluidized combustion of fuels like biomass with low ash content and coal gangue with high ash content.