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The study of the relationship between chlorine content, additive and pollutants in waste incineration
|關鍵字:||fluidized bed;流體化床;incineration;chlorine content;additive;hydrogen chloride;organic compound;焚化;含氯量;添加劑;氯化氫;有機物||出版社:||環境工程學系||摘要:||
Incineration has become the primary technology in the disposal of wastes in Taiwan. However, the hydrogen chloride and organic pollutants produced in the incineration process has aroused great concerns in recent years. When they are released in the atmosphere, they will certainly do serious damage to the environment and human health. But most of the research of controlling of pollutants is mainly focused on the design and operation of air pollutant control devices, or only confined to small tube tests. The kind of research is quite different from the combustion condition of commercial incinerators. The application of the fluidized bed incinerator has gradually increased recently, due to its advantages of disposing municipal wastes. These advantages include good mixing of solids, high heat transfer, a large contact surface area, etc.
This research takes advantage of fluidized bed incinerator to explore the relationship between chlorine content and pollutant emission and studies the impacts on the pollutant emission under different operation conditions, including operation temperature and synthetic solid wastes which contain organic and inorganic chloride. As for the controlling of pollutants, directly add the solid additives to the wastes in the hope of controlling and reducing the generation of pollutants to lower the installment and operation costs of air pollutant control devices. The research results can be the reference of the design and operation of fluidized bed incinerator.
The obtained results indicates that the chlorine-releasing ability of organic chloride is greater than that of inorganic chloride. Therefore, the potential of organic chloride to produce hydrogen chloride, chlorophenols and chlorobenzenes is greater. However, the rising temperature of incineration results in increasing combustion efficiency and reducing the generation of organic pollutants, but increase the emissions of hydrogen chloride. The production of chlorophenols and chlorobenzenes is not in linear relation with chlorine content; the effect of chlorine content seems to have its ultimate limit. The production of PAHS and BTEXS has nothing to do with chlorine sources and chlorine content, but lies in combustion efficiency. However, the addition of calcium oxide to organic chloride contained waste can reduce the production of hydrogen chloride, chlorobenzenes and chlorophenols, but has no obvious impacts on PAHS and BTEXS.
|Appears in Collections:||環境工程學系所|
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