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GC 8: Ancillary Equipment

GC 8: Ancillary Equipment
     Part 1: Introduction
         1. CONTROL AT SOURCE VS ABATEMENT EQUIPMENT
         2. THE SCOPE OF THE REPORT
     Part 2: Dustability and Dispersion Behaviour
         1. INTRODUCTION
         2. A DUSTABILITY TEST FOR PARTICULATE MATERIALS
         3. DISPERSION OF PARTICULATE MATERIALS
         4. PRACTICAL CONSEQUENCES OF MATERIAL BEHAVIOUR
         5. REFERENCES
         6. NOMENCLATURE
     Part 3: Design of Local Exhaust Systems
         1. THE PRINCIPLE OF VENTILATION
         2. DIFFICULTIES IN DESIGNING LOCAL EXHAUST SYSTEMS
         3. ESTIMATION OF THE REQUIRED AIR VELOCITY
         4. DESIGN OF HOOD TO ACHIEVE REQUIRED CAPTURE VELOCITY
         5. DIFFERENT TYPES OF HOOD
         6. SOME COMMENTS ON HOOD DESIGN
         7. SECONDARY AIR MOVEMENTS IN LOCAL EXHAUST DESIGN
         8. DESIGN OF DUCTS
             8.1 Inertia Losses
             8.2 Orifice Losses
             8.3 Straight Duct Friction Losses
             8.4 Elbow Bend and Branch Entry Losses
             8.5 Contraction and Expansion Losses
             8.6 Design Methods
             8.7 Dust Transporting Velocities
             8.8 The Fan
                 8.8.1 Power considerations
                 8.8.2 Corrosion, erosion and fouling considerations
                 8.8.3 Fan designs
             8.9 Air Curtains
         9. REFERENCES
         10. NOMENCLATURE
     Part 4: Control by Improved Handling
         1. DELIVERY OF PARTICULATE MATERIALS
             1.1 Bulk Handling
             1.2 Semi-bulk delivery
             1.3 Small Containers
         2. STORAGE AND REMOVAL FROM STORAGE
             2.1 Stockpiles
             2.2 Bins, Hoppers and Silos
             2.3 Other Closed Containers
         3. PROBLEMS WITH CONVEYORS
             3.1 Pneumatic Conveyors
             3.2 Belt Systems
         4. REFERENCES
         5. NOMENCLATURE
     Part 5: Discharge and Handling of Collected Material
         1. HANDLING FINE MATERIALS
             1.1 The Problem in General
             1.2 Flow Properties of Fine Materials
         2. EQUIPMENT DESIGN, SELECTION AND OPERATION
             2.1 Emptying of Collection Devices
             2.2 Secondary Handling Systems in General
             2.3 Design of Storage Hoppers
             2.4 Feeders and Conveyors for Dusts (Reisner, 1971)
         3. ECONOMIC, ENVIRONMENTAL AND SITING PROBLEMS IN DISPOSAL
             3.1 General Principles
             3.2 Costs of Disposal
             3.3 Wet or Dry Disposal?
             3.4 Pelletting
             3.5 Re-cycling of Fly Ash - An Example
         4. REFERENCES
         5. NOMENCLATURE
     Terms and Conditions of Use

Volume VIII is concerned with the materials-handling aspects of gas cleaning. It examines two principal areas: the control of dusts at source and their subsequent discharge and disposal from gas cleaning equipment. Once a dusty gas has been entrained into a duct then a range of equipment is available which can provide an effective separation. However, the subject of how to control emissions which are not readily ducted has received much less attention. This report therefore provides an evaluation of the means available for the assessment of the tendency of a material to evolve dust, an examination of control principles which aim to prevent emissions by better overall system design, and a review of available design methods for local exhaust systems. In addition, the report examines the procedures used for the discharge and the disposal of the collected dust which, because of its fineness, can sometimes present severe materials-handling