Control method of primary air fan of circulating fluidized bed boiler
A technology of circulating fluidized bed and control method, applied in the field of linkage control of primary fan frequency converter + outlet baffle
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[0029] (1) According to figure 2 , image 3 The indicated bed pressure drop △p l and primary air volume Q 1 The operating characteristics of the bed pressure drop determined by the boiler load rate R and primary air volume .
[0030] (2) Bed pressure drop and primary fan outlet baffle opening and primary air volume Related, can be described as: (1)
[0031] In formula (1), is the bed pressure drop resistance characteristic coefficient, which is determined by the design flow point; It is the resistance coefficient related to the opening of the primary fan outlet baffle, which is a correlation and determined by the resistance characteristic test of the baffle opening. bed pressure drop , primary air volume and coefficient is known, the corresponding baffle opening can be determined by formula (1) .
[0032] (3) Total pressure of primary fan It can be obtained by calculating the resistance of the flue gas system:
[0033] ...
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