Medium-speed mill self-starting and self-stopping control system suitable for deep peak regulation of direct blowing type coal-fired unit
A coal-fired unit and control system technology, which is applied in the direction of combustion control, fuel supply adjustment, block/powder fuel preparation, etc., can solve the problem of longer load lifting time, slow response to grid side load, and coal mill temperature. Advanced problems, to achieve the effect of reducing the amount of generation, reducing the impact of the boiler system, and good energy saving effect
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[0045] Such as figure 1 As shown, the present invention is suitable for direct-blowing coal-fired unit units with opposed combustion boilers on the front and rear walls. Each unit is typically equipped with six medium-speed mills. figure 1 It is a typical thermal system for the medium-speed mill of a direct-blowing coal-fired unit, including a hot primary air pipe 1 passing through an air preheater and another cold primary air pipe 2; the hot primary air pipe 1 and the cold primary air pipe 2 are respectively set There are coal mill hot air adjustment baffle 3 and coal mill cold air adjustment baffle 4; the outlets of the hot primary air pipe 3 and the cold primary air pipe 4 are connected to the entrance of the coal mill 7 after the hot primary air pipe and the cold primary air pipe After the pipes are merged, the air pipe is equipped with the primary air regulating baffle 5 and the air damper 6 of the coal mill; the raw coal is sent from the raw coal bunker 8 through the coal f...
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