|
Pierre Begin
Kenneth A. Camino
Scott A. Drennan
Steve B. Londerville (corespondent)
Lime recovery kilns have widespread use throughout the world as part
of the Kraft pulping process in the paper industry. Burners used in kilns
face unique requirements including flame shaping for best product quality
and the ability to accommodate waste incineration. This paper presents
a case study for the development and demonstration of a multiple-fuel
burner for retrofit on a lime recovery kiln. The kiln burner uses residual
oil as its base fuel and turpentine as a supplementary fuel. Additionally,
stripper-off gas and non-condensable gases are fired in the kiln for destruction.
A specially designed kiln burner, rated at 65 MBtu/hr, was developed for
co-firing these multiple fuels while maximizing the quality and quantity
of the lime product. Computational fluid dynamics (CFD) was used in the
burner design process to guide the positioning of the kiln burner and
the waste gas lance, and to visualize the expected flame shape. The CFD
model featured two-phase droplet combustion of simulated residual oil
and tupentine, radiation heat transfer, and standard k-e turbulence models.
A step-down dual-zone air inlet system was used in the burner design.
The paper concludes with operating performance from the kiln start up
process.
Download
in Adobe Acrobat PDF File (297 KB)
Back to top
|
