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Section 3.2 Thermal Energy Furnaces

Efficiency. Since only 35 to 50% of fired duty is absorbed in the radiant section, the flue gas leaving the radiant chamber contains considerable energy that can be extracted efficiently in the convection section of the furnace. In the convection section, the feed is preheated along with dilution steam to the desired crossover temperature. Residual heat is recovered by generating steam. The overall thermal efficiency of modem furnaces exceeds 93%, and a value of 95% is not uncommon. [Pg.436]

In this section, we consider drives and then a wide range of thermal energy exchangers furnaces, heat exchangers, indirect fluidized beds, motionless mixers, direct contact liquid-liquid, kilns, fluidized beds, and multiple-hearth furnaces. Drying is considered in Section 16.11.3.10. Various direct-contact gas-liquid exchangers are considered in Sections 16.11.3.11 through 3.13. Thermal... [Pg.1359]

See other pages where Section 3.2 Thermal Energy Furnaces is mentioned: [Pg.1412]    [Pg.226]    [Pg.204]    [Pg.98]    [Pg.192]    [Pg.324]    [Pg.267]    [Pg.503]    [Pg.208]    [Pg.232]    [Pg.692]    [Pg.684]    [Pg.243]    [Pg.766]    [Pg.738]    [Pg.730]    [Pg.764]    [Pg.684]    [Pg.86]    [Pg.358]   


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