OCR Text |
Show 3. FT boiler The transition of FT boiler development after 1945 is as shown in Table-8. This indicates significant improvements of fire tube type boilers have been repeated in the cycle of 5 to 6 years. That is, "Cradle period of around 1955", the "Development of pressurized combustion system in 1960", the "Era of 100 Kg/m3h evaporation in 1965", the "conversion into light oil combustion of 1970" and the "Energy saving in 1976" can be pointed out as the steps of development. The classification of these FT boilers by the structure of fire tube boiler is as shown in Fig. 49. The outline descriptions on the representative types go as follows. ff - 46 - |