| 城镇二级出水换热表面混合污垢的成分及形貌 |
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| 引用本文： | 史琳,昝成,杨文言. 城镇二级出水换热表面混合污垢的成分及形貌[J]. 清华大学学报(自然科学版), 2009, 0(2): 236-239 |
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| 作者姓名： | 史琳 昝成 杨文言 |
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| 作者单位： | 清华大学;清华大学 |
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| 基金项目： | 国家科技攻关奥运专项(2005BA904B06);;国家“十一五”科技支撑计划资助项目(2006BAC02A18) |
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| 摘 要： | 城镇二级出水中的致垢成分将导致热能回用过程中污垢的生成。该文在热泵工况下对二级出水在板式换热器内形成的污垢进行了成分及形貌的研究。实验结果表明:热泵工况下,二级出水在板式换热器内形成的污垢是以微生物污垢为主的混合污垢;污垢特性与二级出水的致垢成分存在密切关联;混合污垢表层结构呈空间网状,微生物及其胞外聚合物大量捕获水体中的无机悬浮物,无机悬浮物同时构成了微生物生长繁殖的节点。上述结果为城镇二级出水的热能回用提供必要的基础数据。
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| 关 键 词： | 城镇二级出水 混合污垢 生物污垢 |
Composition and morphology of composite fouling by municipal secondary effluent on heat transfer surfaces |
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| SHI Lin,ZAN Cheng,YANG Wenyan. Composition and morphology of composite fouling by municipal secondary effluent on heat transfer surfaces[J]. Journal of Tsinghua University(Science and Technology), 2009, 0(2): 236-239 |
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| Authors: | SHI Lin ZAN Cheng YANG Wenyan |
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| Affiliation: | 1.Key Laboratory for Thermal Science and Power Engineering of Ministry of Education;Department of Thermal Engineering;Beijing 100084;China;2.State Key Laboratory of Tribology;Tsinghua University;China |
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| Abstract: | Fouling caused by municipal secondary effluent in a plate heat exchanger was investigated for typical working conditions of heat pump heat exchangers.The experiments focused on the composition and morphology of the above fouling.The results show that the fouling by the municipal secondary effluent in the plate heat exchanger is a composite substance consisting mainly of biological products.Thus the fouling characteristics are closely related to the substances in the effluent.The surface structure of the fou... |
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| Keywords: | municipal secondary effluent composite fouling biofouling |
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