Abstract
In the present work, a shaft-type furnace model in which the furnace column is divided into multiple cells was proposed and equilibrium reaction calculation software was used to describe the model. The model was used to study the effects of gasification and melting conditions such as temperature, oxygen partial pressure, and chlorine content on the volatilization behaviors of the low-boiling-point metals Na, K, Pb, and Zn during the gasification and melting process of municipal solid waste in a shaft-type furnace. Consequently, the volatilization ratios of Na, K, Pb, and Zn compounds in the exhaust gas from a pilot plant shaft-type furnace were found to be in good agreement with the calculation results, and the Na, K, Pb, and Zn compounds were volatilized mainly as metal chlorides in the temperature range up to approximately 1173 K. With a further rise in temperature, these low-boiling point metals were volatilized as metallic forms. It was found that almost 100% of Pb and Zn compounds were volatilized regardless of the chlorine content in municipal solid waste; in contrast, the volatilization rates of Na and K increased when the chlorine content increased. Finally, Na, K, Pb, and Zn compounds were converted from reduced metals to metal chlorides such as NaCl, KCl, PbCl2, and ZnCl2 with an increase in the ratio of chlorine to each metal.
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References
Japanese Industrial Standards Committee (2006) Melt-solidified slag aggregate for concrete derived from municipal solid waste and sewage sludge. JIS A 5031, Japanese Standards Association, Tokyo
Japanese Industrial Standards Committee (2006) Melt-solidified slag material for road construction derived from municipal solid waste and sewage sludge. JIS A 5032, Japanese Standards Association, Tokyo
Abe S, Kanbayashi F, Satoh M, Yoshioka Y, Takeda N (2007) Experimental study on the behavior of lead during melt processing in a low oxygen atmosphere. J Jpn Soc Waste Manag Experts 3:175–181
Sakamoto K, Kunii K, Kusamichi T, Murakoshi K, Kawabata H, Kokado M (2001) Evaporation behavior of heavy metal in municipal incinerator melting fly ash. R&D Kobe Steel Eng Rep 51:18–22
Osada S, Osada M, Kokado M, Tokuda M (2004) Thermodynamic study of behavior of elements with low boiling points in the melting process. J Jpn Soc Waste Manag Experts 5:353–362
Matsumiya T, Kiyose A (2002) State of the art in integrated thermodynamic databases. Tesu to Hagane 2:51–58
Kida T, Noma Y, Kounobe K (1991) Chemical composition of ash produced from municipal incinerators and the analogy of the behavior of 36 elements. J Jpn Soc Waste Manag Experts 1:11–20
Japan Waste Research Foundation General research on separation, concentration, and collection management technique of the waste content metal concerning waste treatment. (2006), pp 2–28, 2–64
Miyakoshi K, Miura T, Komatsu T, Himeno S, Momonoi K (2002) Evaluation of pyrolysis conditions in gasification melting system for municipal solid waste. J Jpn Soc Waste Manag Experts 3:161–168
Kubaschewski O, Evans ELL, Alcock CB (1967) Metallurgical thermochemistry, 4th edn. Pergamon, Oxford: Niwa K, Yokokawa T, Nakamura Y Metallurgical thermochemistry (in Japanese translation). Sangyo-tosyo, pp 335–344
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Osada, S., Kuchar, D. & Matsuda, H. Effect of chlorine on volatilization of Na, K, Pb, and Zn compounds from municipal solid waste during gasification and melting in a shaft-type furnace. J Mater Cycles Waste Manag 11, 367–375 (2009). https://doi.org/10.1007/s10163-009-0265-1
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DOI: https://doi.org/10.1007/s10163-009-0265-1