Theory And Operation Of The Fourdrinier Paper Machine
E-Book Overview
This book is concerned with running a paper machine to achieve the best possible performance.
The book is divided into six parts. The first five of these deal with separate sections of the Fourdrinier paper machine: 1, the wet-end flow system; 2, screens and cleaners; 3, the wire part; 4, the press section; and 5, the dryers and calenders. Each of these parts is divided into three main chapters.
The first chapter describes theoretical aspects of the process.
The second chapter of each part concerns operational aspects of the paper machine and details the various factors which can affect the process.
The third chapter of each part is concerned entirely with practical aspects of paper machine operation.
Part 6 is concerned with methods of monitoring the performance of paper machines.
E-Book Information
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Year: 1,967
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City: LONDON
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Pages: 528
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Pages In File: 641
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Language: English
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Topic: 220
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Identifier: ISBN-10: 0-900593-03-2
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Org File Size: 43,879,045
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Extension: pdf
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Toc: Foreword ix
PART 1: THE WET-END FLOW SYSTEM
1I Introduction 3
CHAPTER 1A: THEORETICAL CONSIDERATIONS
1A.1 Flow of Fibre Suspensions 6
1A.2 Influence of Wet-end Design on Operational Stability 15
CHAPTER 1B: OPERATING FACTORS AFFECTING PERFORMANCE
1B.1 Retention on the Wire 31
1B.2 Fresh Stuff Flow and Mixing 35
1B.3 Backwater and Whitewater Systems 38
1B.4 Breast Box Approach System 40
1B.5 Breast Box Design 46
1B.6 Slice Design 54
1B.7 Aeration of the Stock 59
1B.8 Hydraulic Disturbances 63
CHAPTER 1C: RUNNING THE WET-END FLOW SYSTEM
1C.1 Daily Operation 66
lC.2 Maintenance 76
1C.3 Control of Substance 80
1C.4 Practical Points 87
References 95
PART 2: SCREENS AND CLEANERS
2I Introduction 101
CHAPTER 2A: THEORETICAL CONSIDERATIONS
2A.l Theory of Screening 105
2A.2 Theory of Cleaning 117
2A.3 Assessing Screen and Cleaner Efficiency 129
CHAPTER 2B: OPERATING FACTORS AFFECTING SCREENS AND CLEANERS
2B.1 Position in the Flow System 135
28.2 Open Screening Equipment 140
2B.3 Closed Pressure Screens 144
28.4 Early Cleaning Equipment 150
2B.5 Cylindrical Cleaners 152
2B.6 Cyclone Cleaners 154
CHAPTER 2C: RUNNING SCREENS AND CLEANERS
2C.I Daily Operation 171
2C.2 Maintenance 172
2C.3 Practical Points 175
References 180
PART 3: THE WIRE SECTION
3I Introduction 185
CHAPTER 3A: THEORETICAL CONSIDERATIONS
3A.l Drainage in the Table Roll Section 187
3A.2 Forming the Sheet on the Wire 195
3A.3 Drainage at the Suction Boxes 209
3A.4 Conditions for Couching 219
CHAPTER 3B: OPERATING FACTORS AFFECTING THE WIRE SECTION
3B.1 Early Drainage Conditions 226
3B.2 Table Rolls and other Dewatering Devices 232
3B.3 Shake 237
3B.4 Suction Boxes 241
3B.5 The Dandy 247
3B.6 Couching 252
3B.7 The Wire and Showers 262
3B.8 Breast Box Stock Consistency and Temperature 268
38.9 Machine Speed, Substance and Stuff Treatment 269
3B.10 Equipment 271
CHAPTER 3C: RUNNING THE WIRE SECTION
3C.1 Daily Operation 275
3C.2 Maintenance 280
3C.3 Practical Points 286
References 296
PART 4: THE PRESS SECTION
4I Introduction 303
CHAPTER 4A: