Page 76 - Wastewater Solids Incineration Systems

Chapter 5

Combustion Technology

1.0 INTRODUCTION 47 3.1.2 Water Content of
Combustible
2.0 FLUID BED INCINERATION
Materials 56
SYSTEM 47
3.2 Temperature 57
2.1 Principles of
Fluidization 48 3.3 Gas Residence Time 57
3.4 Sufficient Air 57
2.2 Definition of
Fluidization 48 3.5 Turbulence 58
2.3 Liquid-like Behavior 4.0 FLUID BED DESIGN
of Fluidized Bed 49 CONSIDERATIONS 58
2.4 Fluidization Gas 4.1 Fundamental Design
Velocity 51 Parameters 58
2.4.1 Minimum Fluidization 4.1.1 Size of Bed Material
Gas Velocity U 51 and Gas Velocities 59
mf
2.4.2 Terminal Gas 4.1.2 Excess Air 59
Velocity U 52 4.1.3 Combustion
t
2.5 Transport Disengaging Temperature and Gas
Height 53 Residence Time 60
2.6 Freeboard Gas Velocity 53 4.2 Combustion Air
Temperature versus
2.7 Hydrodynamics-Based
Solids Content 60
Groups 54
4.3 Ash Analysis 61
3.0 PRINCIPLES OF
COMBUSTION 55 5.0 DESCRIPTION OF MAJOR
COMPONENTS 62
3.1 Potential 55
3.1.1 Heating Value of 6.0 FLUID BED FURNACE 65
Combustible 6.1 Hot Wind Box Fluid
Materials 56 Bed 66

45 (continued)