Heavy Metals Behavior during Monocombustion and Co-Combustion of Sewage Sludge
Heavy Metals Behavior during Monocombustion and Co-Combustion of Sewage Sludge
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DOI：
10.1089/ees.2005.22.205
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发表时间：
2005-02
影响因子：
1.8
通讯作者：
M. Lopes;P. Abelha;J. Oliveira;I. Cabrita;I. Gulyurtlu
中科院分区：
文献类型：
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作者：
M. Lopes;P. Abelha;J. Oliveira;I. Cabrita;I. Gulyurtlu
本文介绍了在中试流化床系统上对颗粒状干式污水污泥进行燃烧的研究。将污泥单燃和煤共燃的结果与煤燃烧的结果进行了灰分分配、气态污染物形成和重金属行为的比较。结果表明，污泥中的矿物质基本以底灰的形式保留。单燃烧时细灰的生成量小，而共燃烧时由于煤倾向于产生细灰，而细灰中还含有未燃烧的炭，因此细灰的生成量高。发现共燃烧时重金属挥发程度略高于单燃烧；然而，大多数金属被保留在灰烬中，其排放量被发现低于规定水平。汞完全挥发了。然而，在涉及煤的燃烧试验中，汞在低于300°C的温度下被捕获在旋风灰渣中。在污泥单燃烧过程中，Hg在…
This paper presents the study of the combustion of granular dry sewage sludge performed on a pilot fluidized bed system. The results of monocombustion of sludge and co-combustion with coal were compared with those of coal combustion for ash partitioning, the formation of gaseous pollutants, and heavy metals behavior. It was found that the mineral matter of sludge was essentially retained as bottom ash. The production of fine ash was small during the monocombustion but was high during co-combustion due to the tendency of coal to produce fine ash, which also contained unburned char. The degree of heavy metal volatilization was found to be slightly higher during co-combustion than in monocombustion; however, most of the metals were retained in the ash and their emissions were found to be below the regulated levels. Hg was completely volatilized. However, during combustion trials involving coal, Hg was captured in the cyclone ash at temperatures below 300°C. During sludge monocombustion the retention of Hg in...