循環(huán)流化床解耦燃燒（CFBDC）實(shí)現(xiàn)低氮氧化物（NOx）排放的技術(shù)可行性已在處理白酒糟（DSL）的工業(yè)示范裝置上得到了很好驗(yàn)證。低NOx排放被認(rèn)為是由包括焦炭,焦油和熱解氣（py-gas）的DSL熱解產(chǎn)物在燃燒器中再燃時共同還原NOx的結(jié)果。為揭示CFBDC系統(tǒng)中還原NOx的機(jī)理,本研究采用實(shí)驗(yàn)室規(guī)模的沉降爐（DTR）反應(yīng)器,模擬CFBDC再燃條件,研究了生物質(zhì)半焦、焦油和熱解氣對NO的還原能力,并因此概算了 CFBDC中各熱解產(chǎn)物組分的潛在作用。本論文在500℃下熱解DSL制備測試用半焦和焦油,py-gas根據(jù)實(shí)驗(yàn)所得熱解氣的組成采用鋼瓶氣配制。為確保NO被充分還原,大多數(shù)實(shí)驗(yàn)在反應(yīng)物總質(zhì)量給料速度0.15g/min條件下進(jìn)行。第4章首先研究了 NO還原效率（ηe）隨反應(yīng)物進(jìn)料速率、再燃化學(xué)計(jì)量比（SR）、反應(yīng)溫度、停留時間和初始煙氣組成的變化。結(jié)果表明,在相同質(zhì)量流速條件下,焦油較半焦和熱解氣更能抑制NO的產(chǎn)生。熱解氣中CO的存在抑制了均相NO還原反應(yīng),導(dǎo)致熱解氣的ηe較低。對于由DSL制備的半焦和焦油,高溫和高的初始NO、CO濃度促進(jìn)其對NO的還原。本章的主要結(jié)論是:通過熱解產(chǎn)物... 

【文章來源】：中國科學(xué)院大學(xué)(中國科學(xué)院過程工程研究所)北京市

【文章頁數(shù)】：134 頁

【學(xué)位級別】：博士

【文章目錄】：
摘要
Abstract
Chapter 1 Introduction
    1.1 Background
    1.2 Objectives and Significance
    1.3 Thesis Outline
Chapter 2 Literature Review
    2.1 Nitric Oxides
x">        2.1.1 Sources of NOx

        2.1.2 NO_x Emission in China
x Emission Strategy">    2.2 Low-NO_x Emission Strategy
x Formation During Fuel Combustion">        2.2.1 NO_x Formation During Fuel Combustion
x Reduction Technologies">        2.2.2 NO_x Reduction Technologies
x Emission">    2.3 Decoupling Combustion （DC） for Lowering NO_x Emission
        2.3.1 Principle of Decoupling and DC Technology
x Emission in Grate-Based DC">        2.3.2 Low-NO_x Emission in Grate-Based DC
x Emission in CFBDC">        2.3.3 Low-NO_x Emission in CFBDC
Chapter 3 Material and Methodology
    3.1 Preparation of NO-Reduction Reagents
        3.1.1 Feedstock Material
        3.1.2 Pyrolysis Setup and Procedure
        3.1.3 Characteristics of NO-Reduction Reagents
    3.2 Experimental Drop-Tube Reactor for NO-Reduction Evaluation
        3.2.1 Main Chamber
        3.2.2 Heating Control System
        3.2.3 Reagent-Feeding System
        3.2.4 Flue-Gas Supplying System
        3.2.5 Sampling and Analyzing System
    3.3 Experimental Procedure
        3.3.1 Procedure and Analysis
        3.3.2 Validation of Experimental Setup Conditions
Chapter 4 NO Reduction by Biomass Pyrolysis Products
    4.1 Introduction
    4.2 Experimental Conditions
    4.3 Results and Discussion
        4.3.1 NO Reduction Varying with Reagent Feeding Rate
        4.3.2 NO Reduction Varying with SR
        4.3.3 NO Reduction Varying with Reaction Temperature
        4.3.4 NO Reduction Varying with Residence Time
        4.3.5 NO Reduction Varying with Flue Gas Composition
    4.4 Conclusions
Chapter 5 Synergetic Effect Among Pyrolysis Products inReducing NO
    5.1 Introduction
    5.2 Experimental Conditions
    5.3 Results and Discussion
        5.3.1 Synergetic Effect of Binary Reagent
        5.3.2 Synergetic NO Reduction Varying with Reaction Temperature
        5.3.3 Synergetic NO Reduction Varying with Residence Time
        5.3.4 Synergetic NO Reduction Varying with Gas Species
    5.4 Conclusion
Chapter 6 NO Reduction by Reagents Derived from Different Fuels
    6.1 Introduction
    6.2 Materials and Experimental Conditions
        6.2.1 Materials
        6.2.2 Experimental Conditions
    6.3 Results and Discussion
        6.3.1 NO Reduction by Char Reagents and Effect of Ash Content
        6.3.2 NO Reduction by Tar Reagents and Model Tar Compounds
    6.4 Conclusions
Chapter 7 Conclusions and Recommendations
    7.1 Conclusions
    7.2 Innovation
    7.3 Recommendations for Future Work
Nomenclatures
References
Appendix A Chemical Compositions of Tested Tar Reagents
    A.1 GC-MS Spectra
    A.2 Identified Compounds of Tar
Appendix B Calibration Curves of Feeders for Different Reagents
Acknowledgement
Résumé


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