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研究生:胡業智
研究生(外文):Nghiep-Tri Ho
論文名稱:真空抽砂系統分析
論文名稱(外文):An Analysis of Effective Elements of Sand Collector by Vacuum Air
指導教授:黃世疇
指導教授(外文):Shyh-Chour Huang
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:機械與精密工程研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:55
中文關鍵詞:噴砂氣壓輸送機砂回收器
外文關鍵詞:BlastingPneumatic ConveyingSand collector
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大部分現在噴砂機的粒子回收以及集塵系統都是靠現場經驗。本論文的目標是找出一個新的設計方式來提高設計工作性能,論文中提出利用真空集塵機在噴砂技術的一個氣壓輸送機計算模型,使用流體力學原理來計算抽砂過程之參數。一個以MATLAB 撰寫的模型程式用來幫助設計員預測抽砂過程的參數,所有結果均經過實驗的驗證及大鎪股份有限公司的實體機器加以確認。
Most of the particles recycling and dust collecting systems in blasting machine developed in recent year are based on the experimental data. The main object of this study is to find new possibilities of design method in order to enhance the design work.
This study presents a calculation model of pneumatic conveyor by utilizing the vacuum dust collector in blasting technique. By using fluid dynamic to obtains the formula for the process parameters. A program was written in MATLAB supposing to help designer predict the process parameters. All results also been validated by experiments and the actual model by the supporting from RichSou Company.
CONTENTS


ABSTRACT (Chinese)--------------------------------------------------------------- i
ABSTRACT (English)--------------------------------------------------------------------------- ii
ACKNOWLEDGMENTS ----------------------------------------------------------------------- iii
CONTENTS --------------------------------------------------------------------------------------- v
LIST OF FIGURES ------------------------------------------------------------------------------- viii
LIST OF TABLES -------------------------------------------------------------------------------- ix
NOMENCLATURE------------------------------------------------------------------------------- x
CHAPTER 1 INTRODUCTION------------------------------------------------------- 1
1.1 Background of the Sand Blasting Machine and the Necessary for a Sand Collector System------------------------------------------------

1
1.2 Literature Review on Sand Collectors-------------------------------- 2
1.2.1 Crew conveyor type sand collectors----------------------------------- 2
1.2.2 Bucket-belt type conveyors -------------------------------------------- 3
1.2.3 Screw-belt synthesis conveyors --------------------------------------- 3
1.2.4 Air vacuum sand conveyors ------------------------------------------- 4
1.3 Motivation and Description Approach ------------------------------- 5
1.4 Objective and Thesis Overview --------------------------------------- 5
CHAPTER 2 BLASTING MACHINE MODEL ------------------------------------ 7
2.1 Description of the Machine Model ------------------------------------ 7
2.2 Description of Technical Issues --------------------------------------- 9
CHAPTER 3 DESIGN AND ANALYSIS ------------------------------------------- 11
3.1 System Design Algorithm ---------------------------------------------- 11
3.2 Air Flow Rate for Dust Collector ------------------------------------- 13
3.2.1 Flow Reynolds Number ------------------------------------------------ 13
3.2.2 Particle Reynolds Number --------------------------------------------- 13
3.2.3 Drag force on the particle --------------------------------------------- 14
3.2.4 Terminal settling velocity --------------------------------------------- 15
3.2.5 Compressed air expansion --------------------------------------------- 18
3.2.5.a Density of compressed air --------------------------------------------- 18
3.2.5.b Flow regime ------------------------------------------------------------- 19
3.2.5.c Air velocity at the blasting nozzle ------------------------------------ 20
3.2.5.d Air mass flow rate ------------------------------------------------------ 20
3.2.5.e Air volume flow rate---------------------------------------------------- 21
3.2.6 Blasting particle volume flow rate------------------------------------ 21
3.2.7 Required air flow rate for dust collector------------------------------ 23
3.2.8 Diameter of collection pipe--------------------------------------------- 23
3.3 Pressure Drop------------------------------------------------------------- 27
3.3.1 Pressure drop at collection pipe---------------------------------------- 27
3.3.2 Pressure drop in cyclone separator------------------------------------- 30
3.3.3 Pressure drop in dust filter---------------------------------------------- 32
3.4 Case Study----------------------------------------------------------------- 36
CHAPTER 4 RESULTS AND DISCUSSIONS-------------------------------------- 41
CHAPTER 5 CONCLUSION AND FUTURE RESEARCH----------------------- 51
References ------------------------------------------------------------------------------ 53
Appendix A ------------------------------------------------------------------------------ 55
REFERENCES
[1] Gary B. Hemphill, 1981, Blasting Operations, N. Y. McGraw-Hill.
[2] David J. Mason, Predrag Marjanovic, Avi Levy, 1997, “A Simulation System for Pneumatic Conveying System”, Glasgow Caledonian University, UK.
[3] R. Pan, 1998, “Material Properties and Flow Modes in Pneumatic Conveying”, Department of Mechanical Engineering, The University of Newcastle, University Drive.
[4] R.P. King, 2002, Introduction to Practical Fluid Flow, University of Utah, p.56, UK.
[5] Karamanev, D.G., 1996, Equations for The Calculation of Terminal Velocity and Drag Coefficient of Solid Spheres and Gas Bubbles, p.75-84.
[6] M. Haluk Aksel, O. Cahit Eralp, 1994, Gas Dynamics, Prentice Hall, Middle East Technical University, Ankara, Turkey, p.79-138.
[7] R.P. King, 2002, “Transportation of Slurries”, Introduction to Practical Fluid Flow, University of Utah, p.81-116, UK.
[8] Wilson, K.C., Addie, G.R., Sellgren, A. and Cliff, R., 1997, Slurry Transportation using Centrifugal Pumps 2nd Edition, Blackie Academic and Professional.
[9] Pressure Drop Definition, source from www.cleaver-brooks.com/GlossFP.html
[10] Brater, F.E. and King, H.W., 1976, Handbook of Hydraulics for the Solution of Hydraulic Engineering Problems, 6th ed., Mc Graw-Hill, New York.
[11] Colebrook, C.F. and White, C.M., 1937, “The Reduction of Carrying Capacity of Pipes with Age”. Journal of Institution of Civil Engineering 7, p99-118.
[12] R.P. King, 2002, “Blasius Equation”, Introduction to Practical Fluid Flow, University of Utah, p.12, UK.
[13] E. John Finnemore, Joseph B. Franzini, 2002, Fluid Mechanics with Engineering Applications, 10th, Mc Graw Hill, p312.
[14] Shepherd, C.B and C.E. Lapple. 1939, Ind. Eng. Chem., 31:972.
[15] Briggs, L. W. 1946, “Effect of Duct Concentration of Cyclone Performance”, Trans. Am, Inst. Chem. Eng., p511-526.
[16] Howard E. Hesketh, Ph.D., PE, DEE., 1996, Air Pollution Control-Traditional and Hazardous Pollutants, p272-281.
[17] U.S. EPA,1996, Air Pollution Control Equipment for Particle Matter, p106.
[18] Miles L. Croom, 1995, Filter Dust Collectors Design and Application, p25-26.
[19] Cooper, D.W. and V. Hampl, 1976, “Fabric Filtration Performance Model”, Conference on Particle Collection Problems in Converting to Low Sulfur Coals, p149-185.
[20] Turbo Blower Specifications, Chuan Fan Electric Co., Ltd.
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