公开(公告)号：US07849805B2

公开(公告)日：2010-12-14

申请号：US12012559

申请日：2008-02-04

申请人： Hellmuth Brüggemann ,  Frank Rauch ,  Hasthika Weerasinghe

发明人： Hellmuth Brüggemann ,  Frank Rauch ,  Hasthika Weerasinghe

IPC分类号： F23L13/00 ,  F23N3/02 ,  F23D1/00 ,  F23K1/00 ,  F23N3/00

CPC分类号： B02C23/04 ,  F23K3/02 ,  F23K2201/103

摘要： A primary air system for a combustion plant provides a flow of primary air to at least one coal pulverizer, which emits pulverized coal in a downstream direction to a furnace. The primary air system includes a first primary air line for feeding hot primary air to the coal pulverizer and a second primary air line for admixing of cold primary air into the hot primary air line at a mixing location positioned upstream of the coal pulverizer. A control system shuts off the flow of primary air to the coal pulverizer, when the coal pulverizer is being repaired or serviced while the furnace is in operation. The control system includes a first flow control butterfly valve disposed in the first primary air line at a position upstream of the mixing location and a second flow control butterfly valve disposed in the second primary air line at a position upstream of the mixing location. A shut-off butterfly valve, disposed in the primary air line intermediate the mixing location and the coal pulverizer, includes a tandem wing supported at a cental location and movable between an open position and a closed position. The tandem wing has parallel, first and second wings forming a space therebetween. A pressure relief line provides fluid communication with the space between the first and second wings when the tandem wing is in the closed position. A pressure relief butterfly valve is disposed in the pressure relief line.

摘要翻译： 用于燃烧设备的一次空气系统向至少一台煤粉碎机提供一次空气流，该粉煤机沿炉下游方向排出煤粉。 主空气系统包括用于将热一次空气供给到煤粉碎机的第一主空气管线和用于将冷一次空气混合到位于煤粉碎机上游的混合位置的热一次空气管线的第二主空气管线。 当炉子运行时，当煤粉碎机正在修理或维修时，控制系统关闭一次空气流向煤粉碎机的流动。 该控制系统包括：在混合位置上游位置设置在第一一次空气管路中的第一流量控制蝶阀和位于混合位置上游位置处的第二一次空气管路中的第二流量控制蝶阀。 设置在混合位置中间的主空气管线和煤粉碎机中的截止蝶阀包括支撑在中心位置并可在打开位置和关闭位置之间移动的串联翼片。 串联翼具有平行的第一和第二翼，在它们之间形成一个空间。 当双绞翼处于关闭位置时，压力释放线提供与第一和第二翼之间的空间的流体连通。 减压蝶阀设置在减压阀中。