Patent ID: 7013815
Filing Date: 2006-03-21
Classification: F23K

Abstract:
1. In a slotted plate riffler having a plurality of flow channels for directing coal flow and balancing coal flow rates among a plurality of outlet pipes from a splitter junction in a pulverized coal boiler system, a flow control assembly comprising: at least one wake-inducing airfoil positioned upstream of a corresponding flow channel in said riffler, said airfoil having a cross-section defined by a width W that varies along its length H and defining an aerodynamic center corresponding to the point of maximum thickness, which induces an airflow that is accelerated over the wake-inducing airfoil and therefore produces a wake for creating upstream turbulence and a particle wake that preferentially diverts said coal flow to one of said plurality of outlet pipes from the splitter junction without affecting primary air flow.