生活垃圾焚燒過程中氯的識別方法與熱行為特性研究
發(fā)布時間:2022-02-12 14:25
生活垃圾和垃圾衍生燃料的高氯含量易引發(fā)垃圾焚燒爐的運行問題,如過熱器表面的高溫腐蝕并由此降低效率。目前,氯定量研究以及標準化測試方法的研究較少。精確測量生活垃圾和垃圾衍生燃料的氯含量及研究焚燒過程中氯的熱行為特性為本文重點。本文采用5種分析方法(氧彈量熱儀、Schoeniger氧瓶燃燒儀,元素分析儀、馬弗爐和水洗萃。y量生活垃圾8種可燃組分的氯含量?偮群勘贿M一步區(qū)分為有機氯、無機氯和可燃氯、不可燃氯。氯的熱行為特性研究分為以下3個部分:氯揮發(fā)特性實驗在微型焚燒裝置里進行,通過改變燃料組分和熱轉換條件確定影響參數;揮發(fā)物積灰特性取樣在大型垃圾焚燒廠進行,通過在焚燒爐內部煙氣對流管道設置多個取樣棒,運行9個月后收集積灰樣品,采用電子顯微鏡法和能譜法進行物理結構和化學成分的測定分析;自行設計了一套小型垃圾焚燒腐蝕模擬裝置進行腐蝕速率的測試實驗,并區(qū)分不同的積灰成分(NaCl和飛灰)對腐蝕的影響。結果表明:垃圾各組分的氯含量差別較大,從廢木的0.1wt.%到廢包裝塑料的>6.0wt.%(干基)。Schoeniger氧瓶燃燒儀測得塑料類樣品的氯含量最高;水洗萃取法測得有機質中的氯含量...
【文章來源】:天津大學天津市211工程院校985工程院校教育部直屬院校
【文章頁數】:132 頁
【學位級別】:博士
【文章目錄】:
中文摘要
ABSTRACT
ChapterI Introduction
1.1 MSW management in China
1.1.1 Currentstatus
1.1.2 Legislation and regulations
1.1.3 Characteristics of MSW in China
1.2 Energy recovery from MSW& RDF
1.2.1 RDF definition
1.2.2 RDF producing technologies
1.2.3 Energy recovery from MSW& RDF
1.3 Objective of thestudy
1.4 Structure of the thesis
Chapter II Literaturesurvey
2.1 Introduction
2.2 Chlorine in waste
2.2.1 Background
2.2.2 Chlorine origins
2.2.3 Chlorine species
2.2.4 MSW with less chlorine input
2.2.5 Summary
2.3 Analytical methods and observations
2.3.1 Background
2.3.2 Ion Chromatography(IC)
2.3.3 X-ray Fluorescence(XRF)
2.3.4 Inductively coupled plasma-sector field mass spectrometry (ICP-SFMS)
2.3.5 Water extract method
2.3.6 Colorimetric titration
2.3.7 Discussion and Summary
2.4 Thermal behavior of chlorine
2.4.1 Background
2.4.2 Chlorine volatilization and HCl formation
2.4.3 Chlorine induced corrosion
Chapter III Chlorine characterization in MSW& RDF
3.1 Introduction
3.2 Material and methods
3.2.1 Material
3.2.2 Sample preparation
3.2.3 Analytical methods
3.3 Results
3.3.1 Chlorine content
3.3.2 Chlorine species
3.4 Discussion
3.4.1 Chlorine relevance in MSW/RDF
3.4.2 Assessment of analytical methods for TCC
3.4.3 Chlorine species
3.5 Conclusions
Chapter IV Chlorine volatilization during MSW combustion
4.1 Introduction
4.2 Experiments
4.3 Results& Discussion
4.3.1 Temperaturei nf luence
4.3.2In fluence of sulfur
4.3.3In fluence of silica
4.4 Conclusions
Chapter V Chlori dedeposits formationin a WTE plant
5.1 Introduction
5.2 Experiments
5.2.1 Materials
5.2.2 TEDA WTE plant description
5.2.3 Probe settings
5.2.4 Depositsa nalysis
5.2.5 Experimental limitation
5.3 Results
5.3.1 Chlorine distribution
5.3.2 Deposits characterization
5.3.3 Corrosion observation
5.4 Discussion
5.4.1 Error analysis of chlorine distribution
5.4.2 Deposits formation mechanism
5.4.3 In fluences of temperature on deposits characteristic
5.5 Conclusions
Chapter VI Chlorine induced corrosion experiment
6.1 Introduction
6.2 Experiments
6.2.1 Materials
6.2.2 Experimental set-up
6.2.3 Experimental limitations
6.3 Results& Discussion
6.3.1 Corrosion observation
6.3.2 Corrosion rate
6.3.3 Corrosion mechanism
6.4 Corrosionprevention
6.4.1 Removal of NaCl from MSW
6.4.2 Changing the chemical composition of deposits
6.4.3 Temperature control
6.4.4 Changing metal alloy
6.5 Conclusions
Chapter VII Thermodynamic prediction of chlorine fate
7.1 Introduction
7.2 Thermodynamic equilibrium calculation methods
7.2.1 Equilibrium calculation methods
7.2.2 Assumption of calculation
7.2.3 Air excess ratio
7.2.4 System definition and calculation conditions
7.3 Results&discussion
7.3.1 Prediction of fluegas composition
7.3.2 Chlorine distribution of kitchenwaste
7.3.3 Influence of oxygen on chlorine fate
7.3.4 Influenceof sulfur on chlorine fate
7.3.5 Influence of silicon on chlorine fate
7.4 Conclusions
Chapter VIII Summaryandfuturework
8.1 Summary
8.2 Innovations
8.3 Futurework
References
Publications and projects
Acknowledgements
【參考文獻】:
期刊論文
[1]城市生活垃圾中氯含量及氯種類的分析方法[J]. 馬文超,楊肖,陳程,陳冠益. 天津大學學報. 2011(01)
[2]城市生活垃圾氯含量測定方法的研究[J]. 李曉東,楊忠燦,陸勝勇,嚴建華,倪明江. 燃料化學學報. 2002(06)
本文編號:3621883
【文章來源】:天津大學天津市211工程院校985工程院校教育部直屬院校
【文章頁數】:132 頁
【學位級別】:博士
【文章目錄】:
中文摘要
ABSTRACT
ChapterI Introduction
1.1 MSW management in China
1.1.1 Currentstatus
1.1.2 Legislation and regulations
1.1.3 Characteristics of MSW in China
1.2 Energy recovery from MSW& RDF
1.2.1 RDF definition
1.2.2 RDF producing technologies
1.2.3 Energy recovery from MSW& RDF
1.3 Objective of thestudy
1.4 Structure of the thesis
Chapter II Literaturesurvey
2.1 Introduction
2.2 Chlorine in waste
2.2.1 Background
2.2.2 Chlorine origins
2.2.3 Chlorine species
2.2.4 MSW with less chlorine input
2.2.5 Summary
2.3 Analytical methods and observations
2.3.1 Background
2.3.2 Ion Chromatography(IC)
2.3.3 X-ray Fluorescence(XRF)
2.3.4 Inductively coupled plasma-sector field mass spectrometry (ICP-SFMS)
2.3.5 Water extract method
2.3.6 Colorimetric titration
2.3.7 Discussion and Summary
2.4 Thermal behavior of chlorine
2.4.1 Background
2.4.2 Chlorine volatilization and HCl formation
2.4.3 Chlorine induced corrosion
Chapter III Chlorine characterization in MSW& RDF
3.1 Introduction
3.2 Material and methods
3.2.1 Material
3.2.2 Sample preparation
3.2.3 Analytical methods
3.3 Results
3.3.1 Chlorine content
3.3.2 Chlorine species
3.4 Discussion
3.4.1 Chlorine relevance in MSW/RDF
3.4.2 Assessment of analytical methods for TCC
3.4.3 Chlorine species
3.5 Conclusions
Chapter IV Chlorine volatilization during MSW combustion
4.1 Introduction
4.2 Experiments
4.3 Results& Discussion
4.3.1 Temperaturei nf luence
4.3.2In fluence of sulfur
4.3.3In fluence of silica
4.4 Conclusions
Chapter V Chlori dedeposits formationin a WTE plant
5.1 Introduction
5.2 Experiments
5.2.1 Materials
5.2.2 TEDA WTE plant description
5.2.3 Probe settings
5.2.4 Depositsa nalysis
5.2.5 Experimental limitation
5.3 Results
5.3.1 Chlorine distribution
5.3.2 Deposits characterization
5.3.3 Corrosion observation
5.4 Discussion
5.4.1 Error analysis of chlorine distribution
5.4.2 Deposits formation mechanism
5.4.3 In fluences of temperature on deposits characteristic
5.5 Conclusions
Chapter VI Chlorine induced corrosion experiment
6.1 Introduction
6.2 Experiments
6.2.1 Materials
6.2.2 Experimental set-up
6.2.3 Experimental limitations
6.3 Results& Discussion
6.3.1 Corrosion observation
6.3.2 Corrosion rate
6.3.3 Corrosion mechanism
6.4 Corrosionprevention
6.4.1 Removal of NaCl from MSW
6.4.2 Changing the chemical composition of deposits
6.4.3 Temperature control
6.4.4 Changing metal alloy
6.5 Conclusions
Chapter VII Thermodynamic prediction of chlorine fate
7.1 Introduction
7.2 Thermodynamic equilibrium calculation methods
7.2.1 Equilibrium calculation methods
7.2.2 Assumption of calculation
7.2.3 Air excess ratio
7.2.4 System definition and calculation conditions
7.3 Results&discussion
7.3.1 Prediction of fluegas composition
7.3.2 Chlorine distribution of kitchenwaste
7.3.3 Influence of oxygen on chlorine fate
7.3.4 Influenceof sulfur on chlorine fate
7.3.5 Influence of silicon on chlorine fate
7.4 Conclusions
Chapter VIII Summaryandfuturework
8.1 Summary
8.2 Innovations
8.3 Futurework
References
Publications and projects
Acknowledgements
【參考文獻】:
期刊論文
[1]城市生活垃圾中氯含量及氯種類的分析方法[J]. 馬文超,楊肖,陳程,陳冠益. 天津大學學報. 2011(01)
[2]城市生活垃圾氯含量測定方法的研究[J]. 李曉東,楊忠燦,陸勝勇,嚴建華,倪明江. 燃料化學學報. 2002(06)
本文編號:3621883
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