欧美aaaav免费大片-欧美aav-欧美ab片-欧美a级黄色片-国产成人涩涩涩视频在线观看-国产成人深夜福利短视频99

五、 Classified by combustion method

1. Fire-bed combustion boiler: mainly used in industrial boilers, including fixed grate furnaces, reciprocating grate furnaces, etc.; 2. Fire chamber combustion boilers: mainly used in power station boilers, boilers burning liquid fuel, gaseous fuel and pulverized coal Both are fire chamber combustion boilers; 3. Boiling furnace: The air flow rate sent to the grate is high, so that large particles of coal are tumbling in the boiling bed above the grate, and small particles of coal are rising and burning with the air.