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公开(公告)号：US6148744A
公开(公告)日：2000-11-21
申请号：US401357
申请日：1999-09-21
CPC分类号： F23L9/04 , F23C5/32 , F23C6/047 , F23D1/02 , F23C2201/101
摘要： A method of operating a pulverized coal-firing furnace so as to achieve no more than a predetermined variation in the instantaneous vertical velocities of the flow exiting a combustion chamber of the furnace is provided. The method includes, in one variation thereof, providing a series of lower compartments for introducing therethrough one of air, fuel, and air and fuel into the combustion chamber. At least one upper compartment is disposed above the topmost compartment of the series of lower compartments at a relative disposition to the topmost compartment in a spacing range between a contiguous disposition to a more spaced disposition which is no more than twice the average spacing between any given compartment and an adjacent compartment. Air is injected from the at least one upper compartment generally in opposition to the swirling fireball along a direction which is offset to the other side of the diagonal in a manner such that the injected air promotes the evolution of the swirling fireball into an upward flow in the top half of the furnace characterized by portions thereof flowing upward at differing vertical velocities with a maximum variation of no more than thirty percent between the instantaneous vertical velocities of the portions of the upward flow as measured across a horizontal plane in the top half of the furnace.
摘要翻译： 提供了一种操作粉煤燃烧炉的方法，以便达到不超过离开燃烧室的流的瞬时垂直速度的预定变化。 该方法在其一个变型中包括提供一系列下部隔室，用于将空气，燃料和空气和燃料中的一个引入燃烧室。 至少一个上部隔间设置在一系列下部隔室的最上部隔间的上方，以相对配置到最上面隔间的间隔范围内的间隔范围内，间隔距离与间隔更宽的位置之间的距离不超过任何给定的间隔之间的平均间距的两倍 隔间和相邻的隔间。 空气从所述至少一个上隔室通常以与旋转的火球相反的方式从沿对角线的另一侧的方向喷射，使得喷射的空气促进旋转火球向上流动的方式 炉的上半部分，其特征在于其部分以不同的垂直速度向上流动，在向上流动的部分的瞬时垂直速度之间的最大变化不超过百分之三十，最大变化在跨越上半部分的上半部分的水平面上测量 炉。
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