公开(公告)号：US5388536A

公开(公告)日：1995-02-14

申请号：US218465

申请日：1994-03-28

Applicant: Landy Chung

Inventor： Landy Chung

IPC: F23D1/02

CPC classification number: F23D1/02 ,  F23D2201/101 ,  F23D2211/00

Abstract: A low-nox burner for use in industrial furnaces and/or boilers which burn pulverized coal. The burner includes a burner tip which divides an annular pulverized coal stream into alternating fuel-rich and fuel-lean streams. The tip includes a plurality of alternating main and secondary blade members which are skewed to produce rotational movement in the streams. The main blade has a leading edge that is aligned with a radial vector extending through a center axis of the burner and a trailing edge that is tilted with respect to the radial vector in order to define a substantially planar surface between the leading and trailing edges. The secondary blade includes leading and trailing edges that are both aligned with radial vectors and defines a twisted surfaces between the edges. The secondary blade is skewed with respect to the longitudinal direction by an angle that is substantially greater than the angle at which the main blade is skewed. As a result, channels having converging cross sections are defined between the main blade and one adjacent secondary blade, and diverging channels are defined by the main blade and another adjacent secondary blade. During operation, the tip creates a fuel-rich zone surrounded by a fuel-lean zone in the combustion region.

Abstract translation: 用于燃烧粉煤的工业炉和/或锅炉的低噪声燃烧器。 燃烧器包括将环形粉煤流分成交替的富燃料和贫燃料流的燃烧器尖端。 尖端包括多个交替的主和副叶片构件，其被倾斜以在流中产生旋转运动。 主叶片具有与延伸穿过燃烧器的中心轴线的径向矢量对准的前缘和相对于径向矢量倾斜的后缘，以便在前缘和后缘之间限定基本平坦的表面。 次级叶片包括前缘和后缘，它们都与径向矢量对齐并且限定边缘之间的扭曲表面。 次级叶片相对于纵向方向偏斜一个大大大于主叶片歪斜角度的角度。 结果，具有会聚横截面的通道限定在主叶片和相邻的次叶片之间，并且发散通道由主叶片和另一相邻的次叶片限定。 在操作期间，尖端产生在燃烧区域中由燃料贫乏区域包围的富燃料区域。