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Study on the Radiative Properties and Temperature Profile Determination of Participating Media in Rotary Kiln

Author: ChenChunYan
Tutor: NiMingJiang；HuangQunXing
School: Zhejiang University
Course: Thermal Power Engineering
Keywords: Hazardous waste incineration system Reconstruction of the temperature field Participating medium Gas absorption model CFD
CLC: TK124
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


The obvious advantages of incineration because of its wide adaptability to raw materials , reduction, sound , etc. has become the main way for developed countries to deal with the waste incineration plant has also been set up in China's major cities , began research in this area . But at the same time , the study pointed out that the waste incineration has become the main source of the highly toxic substance dioxin-like compounds . Is generally considered closely linked to the generation of dioxin-like compounds , and the kiln temperature field distribution while burning the temperature field in the furnace the distribution run for incineration system stability , reduce kiln slagging great significance . Typical waste incineration system for temperature monitoring still use the thermocouple temperature measuring device not reflect the actual distribution of the temperature in the entire incineration system . Research article based on the method of calculation of radiative heat transfer characteristics of the dispersion medium , try to use flame radiation technology in the rotary kiln incinerator burning furnace section temperature field inversion reconstruction . First, based on Mie scattering theory , the radiation characteristics of spherical solid particles ; and calculate the radiation characteristics of a rotary kiln soot and fly ash particle cloud parameters . Calculated for the parameters of the radiation characteristics of the gas medium , compared the difference of the band model method and line-by-line calculations , that the band model method of calculation accuracy is suitable for engineering applications , can be used for the incinerator mixed gas radiation parameters calculated . Subsequent use Fluent numerically simulated rotary kiln incineration of waste status , obtained the temperature distribution within the combustion space and the field distribution of the concentration of the gas medium . Emissivity of infrared camera settings based on the calculations. The final two-stage rotary kiln incinerator as the research object , based on the reverse Monte Carlo method , the use of charge-coupled device camera for radiation furnace cross-section of two-dimensional dispersion medium temperature field model of rapid reconstruction . The least squares QR (LSQR) matrix decomposition algorithm combines Wien's law section temperature field can be reconstructed . And conducted a field test study , test results confirm the feasibility and practicality of the reconstruction method .

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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