The results prove that the movable heat insulate layer has obvious effects on improving the temperature profile in furnace and combustion efficiency of coal fired boiler at low load.
试验表明：可调卫燃带对改善锅炉低负荷时炉内温度分布及提高燃烧效率具有十分明显的效果。
The fuel and load vary more often, start-up and shutdown times of boiler increase, average load decreases and boilers operate at low load frequently.
火电厂中由于燃煤品质多变，低负荷运行时间不断积累和反复启停，使锅炉受热面积灰日益严重。
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