SO2 Emission from Municipal Sewage Sludge Cocombustion with Bituminous Coal Under O2/CO2 Atmosphere Versus O2/N2 Atmosphere

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• 作者：Cong Shengquan ; Duan Feng ; Zhang Yousong ; Liu Jian ; Zhang Jinpeng ; Zhang Lihui
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：November 21, 2013
• 年：2013
• 卷：27
• 期：11
• 页码：7067-7071
• 全文大小：331K
• 年卷期：v.27,no.11(November 21, 2013)
• ISSN：1520-5029

文摘

The cocombustion of municipal sewage sludge and bituminous coal has the advantages of both volume reduction and waste recycling. However, SO₂ emission is the main pollutant from cocombustion. A tube furnace was used to study the effects of sludge mass percentage, oxygen concentration, and reaction temperature on the SO₂ emission of cocombustion with bituminous coal under O₂/CO₂ or O₂/N₂ atmosphere. Results show that the values of the SO₂ emission peaks decrease with increase of the sludge mass percentage, oxygen concentration, and reaction temperature. The resident time of initial SO₂ emission peak is shortened with the increase of the above three factors. For the same O₂ concentration in the simulated flue gas, the emission of SO₂ from O₂/CO₂ cocombustion is obviously lower than that from O₂/N₂ combustion. The total amount of SO₂ emission and its conversion rate decrease with the sludge mass percentage, and increase with oxygen concentration and reaction temperature.