我国火电厂锅炉大多数采用四角燃烧,这种燃烧方式着火稳定,炉内火焰充满度好,但同时也存在一些缺点。如在水平烟道中出现了一侧烟速高,一侧烟速低的现象,这种现象在高温过热器和高温再热器一侧的下部更为明显。这样,烟速差导致受热面的温度差,对锅炉的安全运行构成了很大的威胁。 Most of the thermal power plant boilers in China use four corners of the combustion, this burning a stable fire, furnace flame fullness, but there are also some shortcomings. For example, in a horizontal flue, there is a phenomenon of one side having a high flue gas velocity and one side having a low flue gas velocity, which is more noticeable at the lower part of the side of the high-temperature superheater and the high-temperature reheater. In this way, the difference of the smoke speed causes the temperature difference of the heating surface, which poses a great threat to the safe operation of the boiler.