一种用于降低氮氧化物排放的锅炉优化方法

Boiler optimization method for reducing nitrogen oxide discharge

Abstract

The invention discloses a boiler optimization method for reducing nitrogen oxide discharge. A boiler is a 600MW machine set boiler, and a hearth of the boiler is sequentially divided into an AA layer, an A layer, an AB layer, a B layer, a BC layer, a C layer, a CD layer, a D layer, a DE layer, an E layer, an EF layer, an E layer, an FF layer and an OFA layer from bottom to top. The method comprises the following steps that the opening degree of a secondary air baffle plate of the AA layer of the boiler is set to -40 percent bias switching automation, the opening degree of a secondary air baffle plate of the AB layer of the boiler is set to -10 percent bias switching automation, the opening degree of a secondary air baffle plate of the BC layer of the boiler is set to -23-30 percent bias switching automation, the opening degree of secondary air baffle plates of the CD layer and the DE layer of the boiler is set to unbiassed switching automation, the opening degree of secondary air baffle plates of the EF layer, the FF layer and the OFA layer of the boiler is set to +15 percent bias switching automation, the opening degree of a secondary air baffle plate of the boiler is set to +15 percent bias switching automation, and the opening degree of a circumferential air baffle plate of the boiler is set to 70 percent when the rotation speed of a coal feeding machine of the boiler is higher than 80 percent of the rated rotating speed. The method realizes the low NOx (nitrogen oxide) discharge.
本发明公开了一种降低氮氧化物排放的锅炉优化方法,该锅炉为600MW机组锅炉,该锅炉的炉膛由下至上依次分为述AA层、A层、AB层、B层、BC层、C层、CD层、D层、DE层、E层、EF层、E层、FF层及OFA层,该方法包括:对所述锅炉的AA层二次风挡板开度设置-40%偏置投自动;对所述锅炉的AB层二次风挡板开度设置-10%偏置投自动;将所述锅炉的BC层二次风挡板开度设置为20~30%;对所述锅炉的CD层及DE层二次风挡板开度设置无偏置投自动;对所述锅炉的EF层、FF层以及OFA层二次风挡板开度设置+15%偏置投自动;对所述锅炉的二次风挡板开度设置+15%偏置投自动;以及将所述锅炉的周界风挡板于所述锅炉的给煤机转速为其额定转速的80%以上时的开度设置为70%。该方法实现了低NOx排放。

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    Title
    付林: "“600MW机组锅炉燃烧优化降低NOx 排放调整”", 《全国火电大机组(600MW级)竞赛第11届年会论文集(上册)》, 1 May 2007 (2007-05-01), pages 40 - 46

Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-105783025-AJuly 20, 2016国网山东省电力公司电力科学研究院, 国家电网公司Method for monitoring distribution of pulverized coal in low-NOx tangential coal-fired boiler