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催化裂化装置再生器排出的高温烟气含有0.3～1.5克/标米~3的催化剂,如直接进入膨胀透平内会被加速到400米/秒以上,催化剂粒子对动、静叶片将产生激烈的冲蚀,膨胀透平运行约700小时就不能进行动力回收了。其解决的办法有两种:1.叶片选用耐磨性材料;2.研究高效率的旋风分离器,使烟气经过三级旋风分离器后再进入膨胀透平。完全靠耐磨材料来解决冲蚀是非常困难的,不论使用哪种高级的材料也不能连续运转一年。日本矿业公司为日本水岛炼油厂催化裂化装置(96万吨/年)研制的高效能三级旋风分离器,采用了切向进气式
The high temperature flue gas discharged from the regenerator of a catalytic cracking unit contains 0.3-1.5 g / m 3 of catalyst. If directly entering the expansion turbine, it will be accelerated to over 400 m / s. The catalyst particles will move to a high temperature Erosion, expansion turbine operation can not be about 700 hours of power recovery. There are two ways to solve the problem: 1. Blades selection of wear-resistant materials; 2. Research efficient cyclone, the flue gas after three cyclones before entering the expansion turbine. It is very difficult to completely solve the erosion by the wear-resisting material, and can not run continuously for one year no matter which kind of advanced material is used. Japan’s mining company for the Japanese Mizushima refinery catalytic cracking unit (960,000 tons / year) developed high-performance three cyclone, the use of tangential intake