Release of Sulfur and Chlorine during Cofiring RDF and Coal in an Internally Circulating Fluidized Bed

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• 作者：Xiaolin Wei*^† ; ; Yang Wang^† ; ; Dianfu Liu^† ; ; Hongzhi Sheng^† ; ; Wendong Tian^‡ ; ; Yunhan Xiao^‡ ;
• 刊名：Energy & Fuels
• 出版年：2009
• 出版时间：March 19, 2009
• 年：2009
• 卷：23
• 期：3
• 页码：1390-1397
• 全文大小：188K
• 年卷期：v.23,no.3(March 19, 2009)
• ISSN：1520-5029

文摘

An internally circulating fluidized bed (ICFB) was applied to investigate the behavior of chlorine and sulfur during cofiring RDF and coal. The pollutant emissions in the flue gas were measured by Fourier transform infrared (FTIR) spectrometry (Gasmet DX-3000). In the tests, the concentrations of the species CO, CO₂, HCl, and SO₂ were measured online. Results indicated when cofiring RDF and char, due to the higher content of chlorine in RDF, the formation of HCl significantly increases. The concentration of SO₂ is relatively low because alkaline metal in the fuel ash can absorb SO₂. The concentration of CO emission during firing pure RDF is relatively higher and fluctuates sharply. With the CaO addition, the sulfur absorption by calcium quickly increases, and the desulfuration ratio is bigger than the dechlorination ratio. The chemical equilibrium method is applied to predict the behavior of chlorine. Results show that gaseous HCl emission increases with increasing RDF fraction, and gaseous KCl and NaCl formation might occur.