Modern Power Station Practice (eBook)

Front Cover 1
Mechanical (Boilers, Fuel – and Ash - Handling Plant) 4
Copyright Page 5
Table of Contents 6
LIST OF ILLUSTRATIONS 14
Chapter 1. Boiler Unit—Furnace and Combustion Equipment 22
1.1. Broad Fundamentals of Boiler Design and Factors affecting Selection 22
1.2. Influence of Boiler Size on Type of Firing to be Adopted 32
1.3. Influence of Nature of Coal on Choice of Firing Equipment 32
1.4. P.F. Milling Plant—Types 33
1.5. P.F. Burner Types and Location in Furnace 43
1.6. Mill/Burner Arrangements 47
1.7. Factors affecting Milling Plant Performance 53
1.8. Standby Capacity 59
1.9. Operation and Maintenance Aspects (P.F.) 60
1.10. Initial and R. & M. Costs (P.F.)
1.11. Stoker Firing 64
1.12. Arrangements of Oil-handling Plant 64
1.13. Oil-burner Types 68
1.14. Oil-burner Arrangements, Ignition and Control 73
1.15. Operation and Maintenance Aspects (Oil) 74
1.16. Combustion 76
1.17. Furnaces 78
1.18. Future Trends 97
Exercises 98
Chapter 2. Boiler Unit—Steam and Water Circuits 100
2.1. Introduction 100
2.2. Disposition of the Heating Surfaces 100
2.3. Water-flow Circuits 104
2.4. Natural and Assisted Circulation 106
2.5. Circulating Pumps 122
2.6. Drum Internals 126
2.7. Steam Purity 128
2.8. Water Capacity 130
2.9. Once-through Boilers 130
2.10. Supercritical Boilers 132
2.11. Furnace Heat Absorption 135
2.12. Convection Zone Heat Absorption 137
2.13. Arrangement of Tube Banks 139
2.14. Heat Transfer inside Tubes 141
2.15. Steam Temperature Control 144
2.16. Steam Side Pressure Losses 147
2.17. Scantlings 148
2.18. Water Side or "On-load" Corrosion 159
2.19. Steam Side Corrosion 162
2.20. Boiler Fouling 162
2.21. Gas Side Corrosion 167
2.22. Requirements for Two-shift Operation 169
2.23. Maintenance 170
2.24. Future Developments 172
Appendix A. Heat Transfer for Boiler Tube Bank Design 172
Appendix B. Boiler Steam Drum Scantling Calculations 195
Bibliography 197
References 198
Exercises 198
Chapter 3. Boiler Unit—Ancillary Plant and Fittings 200
3.1. Introduction 200
3.2. Economisers 200
3.3. Air-heaters 209
3.4. Boiler Plant Cleaning Methods and Equipment 229
3.5. Feed-water Arrangements and Boiler Fittings and Mountings 245
Appendix A 265
Appendix B 267
Appendix C 274
References 275
Exercises 275
Chapter 4. Boiler Unit—Dust Extraction and Draught Plant 278
4.1. The Clean Air Act 278
4.2. The Assessment of Emission from Boiler Plant 281
4.3. Types of Dust Extraction Plant 292
4.4. Fans 312
4.5. Chimneys 326
4.6. Flues, Ducts and Insulation 327
4.7. Flue Gas Washers 335
Exercises 340
References 341
Chapter 5. Fuel- and Ash-handling Plant 342
5.1. Introduction to Coal-handling Plant 342
5.2. Reception 343
5.3. Transfer Arrangements 356
5.4. Introduction to Oil-handling Plant 428
5.5. General Design Considerations 429
5.6. Supplying Oil to the Boiler House 437
5.7. Safety Precautions 444
5.8. Operation and Maintenance of Oil-handling Plant 445
5.9. Introduction to Ash- and Dust-handling and Disposal 446
5.10. Type of Ash- and Dust-handling Plant 447
5.11. Design of Ash-handling Plant 450
5.12. Dust-handling Plant 462
Exercises 476
References 476
Contents of Volumes 1-8 478