Passive Control of Particle Dispersion in a Particle-Laden Circular Jet Using Elliptic Co-Annular Flow: A Means for Improving Utilization and Emission Reductions in Pulverized Coal Burner

Choudhuri, Ahsan R.

University of Texas at Austin

关键词: Coal;    01 Coal, Lignite, And Peat;    Stoichiometry;    Burners;    Design;   

DOI  :  10.2172/825091
RP-ID  :  NONE
RP-ID  :  FG26-01NT41363
RP-ID  :  825091

美国|英语

来源: UNT Digital Library

【 摘 要 】

A passive control technology utilizing elliptic co-flow to control the particle flinging and particle dispersion in a particle (coal)-laden flow was investigated using experimental and numerical techniques. Preferential concentration of particles occurs in particle-laden jets used in pulverized coal burner and causes uncontrollable NO{sub x} formation due to inhomogeneous local stoichiometry. This particular project was aimed at characterizing the near-field flow behavior of elliptic coaxial jets. The knowledge gained from the project will serve as the basis of further investigation on fluid-particle interactions in an asymmetric coaxial jet flow-field and thus is important to improve the design of pulverized coal burners where non-homogeneity of particle concentration causes increased NO{sub x} formation.