Secondary air distribution device used for circulating fluidized bed boiler
A circulating fluidized bed and secondary air technology, applied in the field of boiler combustion, can solve the problems of poor flue gas disturbance, inability to achieve grading in the horizontal direction, and unfavorable full combustion of fuel, so as to prolong the residence time, facilitate reburning, improve The effect of flow
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[0023] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0024] A secondary air distribution device for a circulating fluidized bed boiler, which includes a boiler 1, a water-cooled wall with letting pipes arranged on the four walls of the boiler 1, and a secondary air system. The lower part of the boiler 1 is a dense phase area, The upper part is the rare-phase zone. The secondary air system includes secondary air branch pipes 3, multiple secondary air risers 3 placed outside the boiler front wall 8 and the boiler rear wall 11, and the secondary air riser pipes set on the water wall. 3 The secondary air nozzle 2 is connected. The secondary air nozzle 2 includes a double nozzle and a single nozzle. The secondary air nozzle 2 is arranged in the dilute phase zone of the boiler 1 in layers, and the letting pipe includes a double hole letting pipe and a single hole letting pipe.
[0025] A secondary air header 4...
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