Low-nitrogen combustion device for fluidized bed boiler
A fluidized bed boiler, low-nitrogen combustion technology, applied in the direction of fluidized bed combustion equipment, fuel for combustion in a molten state, combustion method, etc., can solve the problems of insignificant air classification effect, large primary air distribution ratio, and graded combustion effect Low-level problems, to achieve the effects of suppressing the generation of temperature-type nitrogen oxidation, slowing down the burning intensity, and shortening the construction period of the transformation
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[0022] The present invention will be described in detail below in conjunction with accompanying drawing 1.
[0023] As shown in Figure 1, the device of the present invention comprises a primary fan 17, a secondary fan 18, an air chamber 1, a furnace 3, a cyclone separator 5, a tail heating surface flue 11, a dust collector 20, an induced draft fan 22, a chimney 21, and Circulation fan 24. The lower part of the furnace is a variable cross-section dense phase zone 2, and the middle and upper part is a constant cross-section dilute phase zone 4; the tail heating surface flue is equipped with a superheater 10, an economizer 12, and an air preheater 13 from top to bottom ( primary and secondary wind).
[0024] The air passes through the primary fan inlet 16 and passes through the primary air pipe 15 through the air preheater (primary air) to connect to the primary air inlets on the left and right sides of the air chamber. The secondary fan inlet 19 is connected to the air through ...
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