Device and method for reducing discharging of boiler NOx in powder mode
A technology for boilers and furnace fumes, which is applied in the field of reducing boiler NOx emissions by pulverizing, can solve the problems of reducing the load of tail gas denitrification system, reducing the use of catalysts and reducing agents, and harsh reaction conditions, etc., to achieve the goal of suppressing NOx Production amount, reduction of NOx content, effect of oxygen content reduction
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[0024] The specific implementation of the present invention on a large coal-fired boiler will be described in further detail below, but the implementation of the present invention is not limited thereto.
[0025] like figure 1 shown. The pulverizing method of the present invention reduces the NOx emission device of the boiler, including the first flue gas pipeline 2 and the second flue gas pipeline 7;
[0026] The initial end of the first flue gas pipe 2 is placed after the economizer 1 in the flue 1-1, and the end 12 of the first flue gas pipe 2 is placed in the furnace 1-2; the first flue gas pipe A first electric valve 3, a first check valve 4, a furnace fume fan 8, a third electric valve 10, and a coal mill 11 are connected in series in the pipeline of 2;
[0027] After the initial end of the second flue gas pipeline 7 is connected to the induced draft fan and before the desulfurization tower, a second electric valve 6 and a second check valve 5 are connected in series o...
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