초록 ▼

A pulverized fuel combustion burner includes a pulverized fuel and air mixture conduit. A pulverized fuel rich/lean separator is disposed at the axial center of the conduit so that a high concentration mixture is formed at an outer peripheral portion of the conduit and a low concentration mixture is

A pulverized fuel combustion burner includes a pulverized fuel and air mixture conduit. A pulverized fuel rich/lean separator is disposed at the axial center of the conduit so that a high concentration mixture is formed at an outer peripheral portion of the conduit and a low concentration mixture is formed at a central portion of the conduit. The pulverized fuel rich/lean separator has a cross-sectional shape which gradually enlarges in the flow direction at an angle to the flow direction. It becomes parallel to the flow direction downstream of the enlarging portion, and terminates in a flat surface that is perpendicular to the axis of the separator. A passage extends through the pulverized fuel rich/lean separator along the axis.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus comprising:a pulverized fuel and air mixture conduit in a pulverized fuel burner, said conduit having an axial flow direction and an axial centerline; anda pulverized fuel rich/lean separator disposed at the axial centerline of conduit, said pulverized fuel r

[ What is claimed is:] [1.] An apparatus comprising:a pulverized fuel and air mixture conduit in a pulverized fuel burner, said conduit having an axial flow direction and an axial centerline; anda pulverized fuel rich/lean separator disposed at the axial centerline of conduit, said pulverized fuel rich/lean separator comprising a separator body having:an axis extending in the flow direction,a cross-sectional shape comprising (a) a first portion that gradually enlarges in the flow direction and at an angle to the flow direction and (b) a second portion that is parallel to the flow direction and is located downstream of said first portion, anda flat circumferential end surface perpendicular to the axis located at a downstream terminal end of said second portion and said separator body as a whole; anda passage extending through said separator body from an upstream end of said first portion to said flat end surface at said downstream terminal end, said passage being in fluid communication with said conduit only via said upstream end and said downstream terminal end;wherein said conduit has a pulverized fuel and air source point upstream of an upstream end of said pulverized fuel rich/lean separator and said pulverized fuel rich/lean separator is disposed in said conduit such that when a pulverized fuel and air mixture is introduced from said source point the mixture encounters said upstream end of said pulverized fuel rich/lean separator and said first portion so that part of the mixture enters said passage and the remainder of the mixture follows said first portion around the outside of said separator body.