Fundamental Studies of Supercritical CO 2 as A Cleaning Proc
发布时间：2021-11-28 10:54
再制造能够实现对废旧产品的初始工作性能重构,经过再制造的产品性能要求能够等同或超过原始制造的性能表现。通过充分利用报废产品所蕴含的附加价值,再制造可以降低原材料消耗以及碳排放,并为循环经济与可持续发展提供了关键的技术支撑。清洗操作是再制造过程中需求量较大的一道工艺,但由于清洁剂的使用与清洗过程中的资源消耗,其也是对环境影响最大的环节之一。本文在分析和总结了目前常见的清洗工艺,提出一种具有潜在环保性能的、面向柴油发动机零部件的清洗工艺:超临界二氧化碳（SC-CO2）清洗,旨在降低再制造清洗过程中产生的环境污染。通过对污染物质的傅里叶转换红外线光谱、电子探针以及元素分析仪的分析方法,对污染物的理化性质进行了分析。结果表明,在报废和退役的发动机零部件表面,经常留有由于长期服役后产生的有机污染物,如润滑油、润滑脂、积碳等物质。并以此论证了超临界流体清洗技术的可行性。实验研究的对象选择了润滑脂、润滑油以及有机涂层类污染物,利用超临界流体处理设备对研究对象进行研究。研究首先对多参量状态下的污染物去除率进行研究,提出了超临界清洗过程中温度与压力对去除率影响的竞争机制。在此基础上,研究采用析因DoE实...
【文章来源】：大连理工大学辽宁省 211工程院校 985工程院校 教育部直属院校
【文章页数】：171 页
【学位级别】：博士
【文章目录】：
Abstract
中文摘要
1 Introduction
1.1 Requirement for Sustainability Development
1.2 A Brief Introduction to Remanufacturing
1.2.1 Differences between Remanufacturing and Other 'Re-'s
1.2.2 Significance of Cleaning in Remanufacturing
1.3 Cleaning for Remanufacturing
1.3.1 Distinctions of Cleaning for Remanufacturing
1.3.2 Basic Elements in Remanufacturing Cleaning
1.3.3 Potential Cleaning Technologies for Remanufacturing
1.3.4 Current Cleaning Process for Engine Remanufacturers
1.3.5 Trend for Remanufacturing Cleaning
1.3.6 Principles in Selecting Cleaning Processes for Remanufacturing
1.3.7 Summary
1.4 Supercritical Fluids
1.4.1 Brief Introduction to SCFs
1.4.2 Significance of Carbon Dioxide in SCFs
1.4.3 Properties of SC-CO_2
1.4.4 Applications of SC-CO_2
1.4.5 Significance of Contaminant Solubility in SCF Cleaning
1.4.6 Cleaning Models of SC-CO_2 Fluid
1.4.7 Summary
1.5 The Thesis
1.5.1 Research Hypothesis
1.5.2 Research Aim
1.5.3 Research Objectives
1.5.4 Thesis Structure
2 Experimental Facilities
2.1 Supercritical Fluid Cleaning Test Rig
2.1.1 Internal Tank and Snubbers
2.1.2 Cleaning Vessel
2.1.3 Separator Vessels
2.1.4 Pumps and Dehydrator
2.1.5 Experiment Procedures on SCF Rig
2.2 Liquid Blasting Test Rig
3 Oily Contaminant Cleaning
3.1 Analysis of Contamination Layers
3.1.1 Macro Observations
3.1.2 Microscopic Observations
3.1.3 FTIR Analysis
3.1.4 Elemental Analysis
3.2 Lubricating Grease Cleaning
3.2.1 Qualitative Experiment Study
3.2.2 Gravimetric Analysis
3.3 Factorial Study in Lubricating Oil Cleaning
3.3.1 Ingredient Analysis
3.3.2 Experiment Procedures
3.3.3 Effect of Pressure
3.3.4 Effect of Temperature
3.3.5 Effect of Cleaning Time
3.3.6 Effect of Flow Rate
3.3.7 Effect of Co-solvent
3.4 DoE Study for SC-CO_2 Cleaning
3.4.1 Experimental Design and Statistical Analysis
3.4.2 Visualisation of the Experiment Results
3.4.3 Fitting Models
3.4.4 Model Simplification
3.4.5 Residual Diagnosis
3.4.6 Model Interpretation
3.4.7 Optimisation of Cleaning Conditions
3.5 Summary and Conclusions
4 Applications of SC-C_O2 Cleaning on Engines
4.1 Mechanism of SC-CO_2 Fluid Cleaning
4.1.1 Mechanism of SC-CO_2 Treatment in Oily Contaminants
4.1.2 Mechanism of SC-CO_2 Treatment in Paint Layers
4.1.3 A Model for SC-CO_2 Treatment in Remanufacturing Cleaning
4.2 Comparisons of Different Processes in Remanufacturing Cleaning
4.2.1 The Significance of Study on SC-CO_2 Cleaning
4.2.2 Apparatus and Materials
4.2.3 Experimental Procedures
4.3 Results Discussions for Different Contaminants
4.3.1 Results of Retired Engines Cleaning on SC-CO_2
4.3.2 Results of Paint Layers Removal Using SC-CO_2
4.4 Residual Removals by Different Post-Treatment Processes
4.4.1 The Removal of Oily Contaminants
4.4.2 The Removal of Paint Layers
4.5 Summary
5 Life Cycle Assessment
5.1 Technological Background
5.2 Methodology
5.3 Goal and Scope Definition
5.3.1 Goal Definition
5.3.2 Scope Definition
5.3.3 Function Unit
5.3.4 Data Collection
5.3.5 Hypotheses and Simplifications
5.4 LCI Analysis
5.4.1 The LCI of the SCB
5.4.2 The LCI of the PYB
5.5 Life Cycle Impact Analysis
5.6 Life Cycle Interpretation
5.6.1 Significant Issue Identification
5.6.2 Contribution Analysis
5.6.3 Sensitivity,Completeness and Consistency Checks
5.7 Summary
6 Conclusions
6.1 General Conclusions
6.2 Contributions
6.3 创新点摘要
6.4 Research Outlook
References
Appendix A Experimental Test Rig Details
Appendix B Experiment Data
B.1 Raw data of grease cleaning process
B.2 Raw data of lubricating oil cleaning process
Appendix C Cleaning Results by Different Methods
Appendix D Microscopic View of Paint Layers
Research Projects and Publications during PhD Period
Acknowledgement
Curriculum Vitae
本文编号：3524291
【文章来源】：大连理工大学辽宁省 211工程院校 985工程院校 教育部直属院校
【文章页数】：171 页
【学位级别】：博士
【文章目录】：
Abstract
中文摘要
1 Introduction
1.1 Requirement for Sustainability Development
1.2 A Brief Introduction to Remanufacturing
1.2.1 Differences between Remanufacturing and Other 'Re-'s
1.2.2 Significance of Cleaning in Remanufacturing
1.3 Cleaning for Remanufacturing
1.3.1 Distinctions of Cleaning for Remanufacturing
1.3.2 Basic Elements in Remanufacturing Cleaning
1.3.3 Potential Cleaning Technologies for Remanufacturing
1.3.4 Current Cleaning Process for Engine Remanufacturers
1.3.5 Trend for Remanufacturing Cleaning
1.3.6 Principles in Selecting Cleaning Processes for Remanufacturing
1.3.7 Summary
1.4 Supercritical Fluids
1.4.1 Brief Introduction to SCFs
1.4.2 Significance of Carbon Dioxide in SCFs
1.4.3 Properties of SC-CO_2
1.4.4 Applications of SC-CO_2
1.4.5 Significance of Contaminant Solubility in SCF Cleaning
1.4.6 Cleaning Models of SC-CO_2 Fluid
1.4.7 Summary
1.5 The Thesis
1.5.1 Research Hypothesis
1.5.2 Research Aim
1.5.3 Research Objectives
1.5.4 Thesis Structure
2 Experimental Facilities
2.1 Supercritical Fluid Cleaning Test Rig
2.1.1 Internal Tank and Snubbers
2.1.2 Cleaning Vessel
2.1.3 Separator Vessels
2.1.4 Pumps and Dehydrator
2.1.5 Experiment Procedures on SCF Rig
2.2 Liquid Blasting Test Rig
3 Oily Contaminant Cleaning
3.1 Analysis of Contamination Layers
3.1.1 Macro Observations
3.1.2 Microscopic Observations
3.1.3 FTIR Analysis
3.1.4 Elemental Analysis
3.2 Lubricating Grease Cleaning
3.2.1 Qualitative Experiment Study
3.2.2 Gravimetric Analysis
3.3 Factorial Study in Lubricating Oil Cleaning
3.3.1 Ingredient Analysis
3.3.2 Experiment Procedures
3.3.3 Effect of Pressure
3.3.4 Effect of Temperature
3.3.5 Effect of Cleaning Time
3.3.6 Effect of Flow Rate
3.3.7 Effect of Co-solvent
3.4 DoE Study for SC-CO_2 Cleaning
3.4.1 Experimental Design and Statistical Analysis
3.4.2 Visualisation of the Experiment Results
3.4.3 Fitting Models
3.4.4 Model Simplification
3.4.5 Residual Diagnosis
3.4.6 Model Interpretation
3.4.7 Optimisation of Cleaning Conditions
3.5 Summary and Conclusions
4 Applications of SC-C_O2 Cleaning on Engines
4.1 Mechanism of SC-CO_2 Fluid Cleaning
4.1.1 Mechanism of SC-CO_2 Treatment in Oily Contaminants
4.1.2 Mechanism of SC-CO_2 Treatment in Paint Layers
4.1.3 A Model for SC-CO_2 Treatment in Remanufacturing Cleaning
4.2 Comparisons of Different Processes in Remanufacturing Cleaning
4.2.1 The Significance of Study on SC-CO_2 Cleaning
4.2.2 Apparatus and Materials
4.2.3 Experimental Procedures
4.3 Results Discussions for Different Contaminants
4.3.1 Results of Retired Engines Cleaning on SC-CO_2
4.3.2 Results of Paint Layers Removal Using SC-CO_2
4.4 Residual Removals by Different Post-Treatment Processes
4.4.1 The Removal of Oily Contaminants
4.4.2 The Removal of Paint Layers
4.5 Summary
5 Life Cycle Assessment
5.1 Technological Background
5.2 Methodology
5.3 Goal and Scope Definition
5.3.1 Goal Definition
5.3.2 Scope Definition
5.3.3 Function Unit
5.3.4 Data Collection
5.3.5 Hypotheses and Simplifications
5.4 LCI Analysis
5.4.1 The LCI of the SCB
5.4.2 The LCI of the PYB
5.5 Life Cycle Impact Analysis
5.6 Life Cycle Interpretation
5.6.1 Significant Issue Identification
5.6.2 Contribution Analysis
5.6.3 Sensitivity,Completeness and Consistency Checks
5.7 Summary
6 Conclusions
6.1 General Conclusions
6.2 Contributions
6.3 创新点摘要
6.4 Research Outlook
References
Appendix A Experimental Test Rig Details
Appendix B Experiment Data
B.1 Raw data of grease cleaning process
B.2 Raw data of lubricating oil cleaning process
Appendix C Cleaning Results by Different Methods
Appendix D Microscopic View of Paint Layers
Research Projects and Publications during PhD Period
Acknowledgement
Curriculum Vitae
本文编号：3524291
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