| 摘要 |
FIELD: mechanical engineering. SUBSTANCE: preheater is provided with tight water tank whose bottom is in contact with gas flame. Outlet branch pipe of water tank made in form of vertical finned pipe is located inside casing in flow of combustion products and is connected with water coil. Water entering the preheater gets heated both by flame of gas burner and by flow of combustion products flowing through casing to smoke stack. EFFECT: enhanced economical efficiency. |
