Steam Boiler is main component of thermal plants. Water-tube boiler consists of a furnace enclosed by the water tubes membrane. The crushed fuel from the crushers is fed into the boiler furnace over the grate. The hot air from the Forced Draft (FD) fan is mixed …
Steam Tables Pressure psig Temperature F Sensible Heat Btu/lb Latent Heat Btu/lb Total Heat Btu/lb Volume Dry Saturated ft3/lb 0 212 180 971 1151 26.80 15 250 218 946 1164 13.90 31 275 244 929 1173 9.30 51 299 268 912 1180 6.60 100 338 309 882 1190 3
Proper treatment of boiler feedwater effectively protects against corrosion of feedwater heaters, economizers, and deaerators. The ASME Consensus for Industrial Boilers (see Chapter 13) specifies maximum levels of contaminants for corrosion and deposition control in boiler systems. The consensus is that feedwater oxygen, iron, and copper
To generate high evaporation rate accompanied by high steam pressure, the fire-tube boiler becomes exorbitantly heavy; therefore, the size and weight become extremely difficult to manage. In regards to the size of the shell, these shortcomings are circumvented by passing flue gases outside the tubes, instead of inside, and water is circulated through the tubes for evaporation.