Patent ID: 7930981

Claim:
An adjustable riffler for use in a piping system connecting a pulverizer and a furnace, the adjustable riffler comprising: a support member; at least two plates spaced apart along an axis, the at least two plates including a fixed plate attached to the support member and a translatable plate positioned adjacent to the fixed plate and translatable along the axis with respect to the fixed plate; and at least one inclined flange connected to one of the fixed plate and the translatable plate and extending along the axis between the plates to form a channel between the fixed plate and the translatable plate, wherein the at least one inclined flange includes a first inclined flange oriented to direct fuel into a first piping branch and a second inclined flange oriented to direct fuel into a second piping branch, and wherein the translatable plate includes a first inclined flange and a second inclined flange, and the fixed plate comprises a first fixed plate having a first inclined flange and a second fixed plate having a second inclined flange, and wherein the first inclined flange on the translatable plate overlaps the first inclined flange on the first fixed plate, and the second inclined flange on the translatable plate overlaps the second inclined flange on the second fixed plate.