Patent ID: 6840183
Filing Date: 2005-01-11
Classification: B02C,B04C,F23K

Abstract:
1. In a coal delivery system comprising a delivery pipe from a pulverized coal source to the burner nozzle of a combustion chamber, the pipe being connected to the burner nozzle through an elbow portion adjacent the nozzle, a diffuser comprising: a diffuser structure in the pipe between the elbow and the nozzle, the diffuser structure comprising a combination of radial and axial diffusion elements for engaging and diffusing radial and axial portions of coal concentrations flowing through the pipe, and a venturi inlet upstream of the radial and axial diffusion elements; wherein the radial diffusion elements comprise a plurality of radially-spaced vertical diffuser bars extending from the venturi inlet and arranged axially along the inside wall of the pine, and the axial diffusion elements comprise a plurality of diffuser rings arranged radially between and spaced axially along the vertical diffuser bars.