公开(公告)号：US5829369A

公开(公告)日：1998-11-03

申请号：US747319

申请日：1996-11-12

Applicant: Jennifer L. Sivy ,  Larry W. Rodgers ,  John V. Koslosy ,  Albert D. LaRue ,  Keith C. Kaufman ,  Hamid Sarv

Inventor： Jennifer L. Sivy ,  Larry W. Rodgers ,  John V. Koslosy ,  Albert D. LaRue ,  Keith C. Kaufman ,  Hamid Sarv

IPC: F23D1/02 ,  F23C1/10 ,  F23C1/12 ,  F23C7/00 ,  F23C7/02 ,  F23D1/00 ,  F23D17/00 ,  F23K3/02

CPC classification number: F23C7/004 ,  F23D1/00 ,  F23C2201/20

Abstract: A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.

Abstract translation: 燃烧器通过在低NOx燃烧器中实现过渡区域而具有较低的排放和较低的未燃燃料损失。 改进的燃烧器包括由过渡区围绕的粉碎的燃料输送喷嘴，其将中心贫氧燃料脱挥发分区域与涡流二次燃烧空气进行屏蔽。 过渡区域充当初级和次级空气流之间的缓冲区，以通过在一级和二级空气流之间提供有限的再循环区域来改善近燃烧器混合和火焰稳定性的控制。 这些有限的再循环区将逸出的NOx转移回贫氧燃料热解区，以还原成分子氮。 替代实施例包括天然气和燃料油燃烧。

公开(公告)号：US5205226A

公开(公告)日：1993-04-27

申请号：US850600

申请日：1992-03-13

Applicant: John B. Kitto, Jr. ,  Roger J. Kleisley ,  Albert D. LaRue ,  Chris E. Latham ,  Thomas A. Laursen

Inventor： John B. Kitto, Jr. ,  Roger J. Kleisley ,  Albert D. LaRue ,  Chris E. Latham ,  Thomas A. Laursen

IPC: F23C99/00 ,  F23C5/00 ,  F23D1/02

CPC classification number: F23D1/02 ,  F23C5/00 ,  F23C2900/05081

Abstract: A low NO.sub.x burner system for a furnace having spaced apart front and rear walls, comprises a double row of cell burners on each of the front and rear walls. Each cell burner is either of the inverted type with a secondary air nozzle spaced vertically below a coal nozzle, or the non-inverted type where the coal nozzle is below the secondary air port. The inverted and non-inverted cells alternate or are provided in other specified patterns at least in the lower row of cells. A small percentage of the total air can be also provided through the hopper or hopper throat forming the bottom of the furnace, or through the boiler hopper side walls. A shallow angle impeller design also advances the purpose of the invention which is to reduce CO and H.sub.2 S admissions while maintaining low NO.sub.x generation.

Abstract translation: 用于具有间隔开的前壁和后壁的炉的低NOx燃烧器系统包括在前壁和后壁中的每一个上的双排电池燃烧器。 每个电池燃烧器是倒置式的，二次空气喷嘴在煤喷嘴下方垂直间隔开，或者是非喷嘴型，煤喷嘴在二次空气口下方。 反向和非反转的单元交替或者至少在下一行单元中以其它指定的图案提供。 总空气的一小部分也可以通过形成炉底的料斗或料斗喉部，或通过锅炉料斗侧壁提供。 浅角叶轮设计还提出了本发明的目的，其目的是在保持低NOx产生的同时减少CO和H2S入口。

公开(公告)号：US4448135A

公开(公告)日：1984-05-15

申请号：US500016

申请日：1983-06-07

Applicant: Donald R. Dougan ,  Albert D. LaRue ,  John J. Wolf

Inventor： Donald R. Dougan ,  Albert D. LaRue ,  John J. Wolf

IPC: F23D1/00

CPC classification number: F23D1/00

Abstract: A coal-air separator to be used in combination with a pulverized coal-fired burner having an elbow section and a wye section. The wye section is flow connected to the outlet of the elbow so that the coal-rich portion is transported through the main fuel conduit to the burner. The coal lean portion is transported through the take-off conduit, the outlet being positioned outside the furnace windbox.

Abstract translation: 一种煤 - 空气分离器，与具有弯头部分和叶片部分的粉煤燃烧器组合使用。 叶片部分流动连接到弯头的出口，使得富煤部分通过主燃料管道输送到燃烧器。 煤lean部分通过引流管输送，出口位于炉风箱外。