Pneumatic Conveying Design Guide – Second Edition

كتاب
المرشد في تصميم السيور النيوماتيكية
Pneumatic Conveying Design Guide – Second Edition
David Mills
Part A: Systems and Components
1. Introduction to pneumatic conveying and the guide 03
1.1 Introduction 03
1.2 Pneumatic conveying 03
1.3 Information provided 13
1.4 Review of chapters 14
1.5 Definitions 20
1.6 Nomenclature 25
References 28
2. Review of pneumatic conveying systems 29
2.1 Introduction 29
2.2 System types 29
2.3 System requirements 48
2.4 Material property influences 50
References 53
3. Pipeline feeding devices – Part I: Low pressure and vacuum 54
3.1 Introduction 54
3.2 Rotary valves 58
3.3 Screw feeders 68
3.4 Venturi feeders 69
3.5 Gate lock valves 71
3.6 Suction nozzles 73
3.7 Trickle valves 76
3.8 Blow tanks 77
References 79
4. Pipeline feeding devices – Part II: High pressure 80
4.1 Introduction 80
4.2 Screw feeders 81
4.3 Rotary valves 82
4.4 Blow tanks 82
4.5 Lock hoppers 101
References 103
5. Pipelines and valves 104
5.1 Introduction 104
5.2 Pipelines 104
5.3 Valves 110
5.4 Rubber hose 114
References 116
6. Air movers 117
6.1 Introduction 117
6.2 Types of air mover 117
6.3 Air compression effects 130
6.4 Pre-cooling systems 137
6.5 Nomenclature 137
References 138
7. Gas–solid separation devices 139
7.1 Introduction 139
7.2 Dust control 140
7.3 Separation devices 141
7.4 System considerations 150
References 151
8. System selection considerations 152
8.1 Introduction 152
8.2 Variables involved 153
8.3 Variables investigated 155
8.4 Material compatibility 164
8.5 Design curves 164
8.6 Power requirements 172
8.7 System selection considerations 177
Part B: System Design
9. Air flow rate evaluation 183
9.1 Introduction 183
9.2 Volumetric flow rate 186
9.3 The influence of pressure 190
9.4 Stepped pipeline systems 196
9.5 Pipeline purging 202
9.6 The influence of temperature 203
9.7 The influence of altitude 208
9.8 The use of air mass flow rate 209
9.9 Nomenclature 210
10. Air only relationships 211
10.1 Introduction 211
10.2 Pipeline pressure drop 211
10.3 Venturi analysis 224
vi CONTENTS
10.4 Air flow rate control 227
10.5 Stepped pipelines 232
10.6 Nomenclature 234
References 235
11. Conveying characteristics 236
11.1 Introduction 236
11.2 Single phase flow 237
11.3 Gas–solid flows 239
11.4 The determination of conveying characteristics 243
11.5 Energy considerations 247
11.6 Component pressure drop relationships 252
11.7 Nomenclature 257
References 257
12. Conveying capability 258
12.1 Introduction 258
12.2 The influence of materials 258
12.3 System capability 283
References 286
13. Material property influences 287
13.1 Introduction 287
13.2 Conveying modes 287
13.3 Conveying capability correlations 294
13.4 Material grade influences 305
13.5 Material degradation effects 311
References 318
14. Pipeline scaling parameters 319
14.1 Introduction 319
14.2 Scaling requirements 319
14.3 Conveying distance 320
14.4 Pipeline bore 327
14.5 Pipeline bends 333
14.6 Vertical pipelines 342
14.7 Pipeline material 346
14.8 Stepped pipelines 349
References 353
15. Design procedures 355
15.1 Introduction 355
15.2 The use of equations in system design 355
15.3 The use of test data in system design 367
15.4 Typical pipeline and material influences 372
16. Case studies – Part I: Fine material 384
16.1 Introduction 384
16.2 Conveying data 385
16.3 Procedure 388
17. Case studies – Part II: Coarse material 395
17.1 Introduction 395
17.2 Conveying data 395
17.3 Procedure 398
18. First approximation design methods 404
18.1 Introduction 404
18.2 Air only pressure drop method 405
18.3 Universal conveying characteristics method 413
19. Multiple use systems 423
19.1 Introduction 423
19.2 Multiple material handling 424
19.3 Multiple delivery points 426
19.4 The use of stepped pipelines 428
References 435
Part C: System Operation
20. Troubleshooting and material flow problems 439
20.1 Introduction 439
20.2 Pipeline blockage 439
21. Optimizing and up-rating of existing systems 461
21.1 Introduction 461
21.2 System not capable of duty 463
21.3 Optimizing existing systems 464
21.4 Case study 467
21.5 Alternative methods of up-rating 474
22. Operating problems 478
22.1 Introduction 478
22.2 Types of system 479
22.3 System components 482
22.4 System related 491
22.5 Material related 494
References 497
23. Erosive wear 498
23.1 Introduction 498
23.2 Influence of variables 499
23.3 Industrial solutions and practical issues 512
References 524
viii CONTENTS
24. Particle degradation 526
24.1 Introduction 526
24.2 Influence of variables 530
24.3 Recommendations and practical issues 538
24.4 Pneumatic conveying data 540
24.5 Particle melting 544
References 546
25. Moisture and condensation 547
25.1 Introduction 547
25.2 Humidity 547
25.3 Air processes 554
25.4 Energy considerations 564
25.5 Nomenclature 569
26. Health and safety 570
26.1 Introduction 570
26.2 Dust risks 571
26.3 Conveying systems 578
26.4 System components 580
26.5 Conveying operations 583
26.6 Explosion protection 587
References 594
Appendix 1: Determination of relevant material properties 595
A1.1 Introduction 595
A1.2 Particle size and shape 596
A1.3 Particle and bulk density 602
A1.4 Flow properties 605
A1.5 Aeration properties 608
References 616
Appendix 2: Additional conveying data 617
A2.1 Introduction 617
A2.2 Materials and pipelines listings 617
A2.3 Material properties listings 620
A2.4 Additional conveying data 622
Index 62
كلمة سر فك الضغط : books-world.net
The Unzip Password : books-world.net