MIL-HDBK-1003/7
3.1.3.2
Load Curves.........................................17
3.1.3.3
Load Duration Curves................................17
3.2
Steam Power Plant Design............................18
3.2.1
Steam Conditions....................................18
3.2.2
Heat Balances.......................................18
3.3
Plant Design Factors................................18
4.1
Steam Generators (Boilers)..........................29
4.2
Steam Pressures and Temperatures....................29
4.2.1
Rated Pressure and Temperature......................29
4.2.2
Maximum Allowable Working Pressure..................29
4.2.2.1
Safety Valves and Safety Relief Valves..............29
4.2.2.2
Normal Operating Pressure...........................29
4.3
Natural Gas Firing..................................30
4.4
Fuel Oil Firing.....................................30
4.5
Coal Firing.........................................30
4.5.1
Definitions of Boiler and Stoker Criteria...........30
4.5.1.1
Stoker Grate Burning Rate...........................30
4.5.1.2
Velocities in Convection Sections of Boilers........30
4.5.1.3
Furnace Volume......................................30
4.5.1.4
Effective Radiant Heating Surface...................30
4.5.2
Types of Stokers Used in Power Plants...............31
4.5.2.1
Front Gravity Feed Traveling Grate Stoker...........31
4.5.2.2
Overfeed Spreader Stoker with Traveling Grate.......32
4.5.3
Stoker Criteria.....................................32
4.5.4
Pulverized Coal.....................................32
4.5.4.1
Coal Feeders........................................32
4.5.4.2
Pulverizers.........................................34
4.5.5
Pulverized Coal Firing vs. Stoker Coal Firing.......35
4.5.6
Coal Scales.........................................37
4.6
Wood Firing.........................................37
4.6.1
Suspension Burning..................................37
4.7
Soot Blowers........................................37
Page
4.8
Economizers.........................................37
4.9
Air Heaters.........................................37
4.10
Forced Draft Fans...................................37
4.11
Induced Draft Fans..................................37
4.12
Primary Air Fans....................................38
4.13
Overfire Air Fans...................................38
4.14
Cinder Return Fans..................................38
4.15
Stacks..............................................38
4.16
Blowdown Equipment..................................38
4.17
Essential Plant Equipment...........................38
4.17.1
Steam Drive Auxiliaries.............................38
4.18
Equipment Selection.................................38
5.1
Typical Plants and Cycles...........................43
5.1.1
Definition..........................................43
5.1.2
Steam Turbine Prime Movers..........................43
5.1.2.1
Smaller Turbines....................................43
5.1.2.2
Larger Turbines.....................................43
5.1.3
Selection of Cycle Conditions.......................43
5.1.3.1
Simple Condensing Cycles............................43
5.1.3.2
Controlled Extraction-Condensing Cycles and Back
Pressure Cycles...................................43
5.1.3.3
Topping Cycle.......................................44
5.1.4
General Economic Rules..............................44
5.1.5
Selection of Cycle Steam Conditions.................49
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