Method for changing Babcock and Wilcox 1165 type boiler combustor combination

Abstract

The invention relates to a method for changing the Babcock and Wilcox 1165 type boiler combustor combination. A combustor layer A and a combustor layer C are input to a front wall of a boiler, a combustor layer D and a combustor layer E are input to a rear wall of the boiler, the combustor layer A corresponds to a coal mill which is numbered as A and supplies pulverized coal, the combustor layer C corresponds to a coal mill which is numbered as C and supplies pulverized coal, the combustor layer D corresponds to a coal mill which is numbered as D and supplies pulverized coal, and the combustor layer E corresponds to a coal mill which is numbered as E and supplies pulverized coal. The pulverized coal milled through the coal mill A, the coal mill C, the coal mill D and the coal mill E is conveyed to four turbulent burners arranged in the layer A, the layer C, the layer D and the layer E through a powder conveying pipeline with wind as a conveying medium, and pulverized coal airflow enters a hearth and then is combusted. To improve the combustion economical efficiency, the method is used for the boiler of the Babcock and Wilcox type, an existing combined running manner of the coal mills and the combustors is changed, collision and momentum exchange strength between all branches of airflow and pulverized coal particles in the boiler is enhanced, the trend of airflow in the furnace is more reasonable, airflow distribution tends to be even from turbulence, and the effects of improving the combustion strength and improving the economical efficiency are achieved.

Description

technical field [0001] The invention belongs to the technical field of power plant boiler operation and energy saving and consumption reduction, in particular to a method for changing the combinatorial combination of a Bawei 1165 boiler burner. Background technique [0002] The power station boiler manufactured by my country's imported Babcock & Wilcox Company (referred to as "Bavi") technology has an evaporation capacity of 1165t / h (referred to as 1165 type), and uses swirl burners and front and rear wall layouts. According to the load requirements of the generator set and the actual coal quality, the boiler is equipped with 5 coal mills, such as figure 1 As shown, the original operation mode: two layers of burners A and B on the front wall of the boiler, and two layers of burners on the back wall D and E, corresponding to medium-speed coal mills A, B, D, and E that provide pulverized coal respectively. In the original mode of operation, the burners on the lower floors A a...

AI Technical Summary

Problems solved by technology

The combustion economy of this operation mode is poor, especially the middle and upper burners operate alone, which cannot achieve the effect of hedging combustion. The content of combustibles in ash and slag increases, and the combustion efficiency decreases

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