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我厂 EⅡ-670/140型煤粉炉燃烧系统一次风管上配有16台风粉混合器。其原设计为普通的风粉混合器,在运行中经常堵粉和向煤粉仓内返热风,尤其在煤粉仓粉位低时使粉仓内温度不正常地升高,甚至着火,严重威胁安全运行。当改为喷射式混合器以后,基本上解决了上述问题。但由于结构的变化和风粉混合物流速的提高,风粉混合器磨损严重。一台由12毫米厚钢板制作的喷射式风粉混合器,使用一年左右就
I plant E Ⅱ-670/140 type pulverized coal furnace combustion system with a duct on the first 16 powder mixer. The original design for the ordinary powder mixer, in operation often plugging powder and return to the hot air inside the coal bunker, especially when the bunches of flour bunker low temperature abnormalities in the bunker abnormalities, or even fire, serious Threatened the safe operation. When the switch to the jet mixer, basically solve the above problem. However, due to changes in the structure and the flow velocity of the air-powder mixture, the air-powder mixer suffers severe wear. A jet mill made of 12 mm thick steel plate is used for about a year