1. anthracite coal
2. bituminous coal
3. lignite
4. peat
anthracite coal
1. atmospheric pressure
2. 5 kg/cm2
3. 10 kg/cm2
4. 75-80 kg/cm2
75-80 kg/cm2
1. give maximum space
2. give maximum strength
3. withstand pressure inside boiler
4. resist intense heat in fire box
resist intense heat in fire box
1. non-coking bituminous coal
2. brown coal
3. pulverized coal
4. coking bituminous coal
non-coking bituminous coal
1. horizontal
2. vertical
3. inclined
4. both horizontal and vertical
horizontal
1. one-half
2. one-third
3. one-fourth
4. two-fifth
two-fifth
1. serve as storage of steam
2. serve as storage of feed water for water wall
3. remove salts from water
4. separate steam from water
separate steam from water
1. centrifugal pump
2. axial flow pump
3. gear pump
4. reciprocating pump
reciprocating pump
1. coking coal
2. non coking or free burning coal
3. pulverized coal
4. high sulphur coal
non coking or free burning coal
1. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
2. water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
3. feed pump is employed to supplement natural circulation in water wall type furnace
4. water is converted into steam in one pass without any re-circulation
heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum