闪蒸罐除沫器损坏原因分析与处理措施

Cause Analysis and Treatment Measures of Flash Tank Demister Damage

针对GE煤气化工艺黑水处理过程中,高压闪蒸罐旋流板式除沫器在运行过程中多次出现叶片断裂损坏的问题,采用理论核算和实际调查等方法,从除沫器的初始设计、工艺操作、设备维修制作方面进行了分析论证。结果发现,引起除沫器损坏的主要原因是流经除沫器的气相负荷为原设计的1.5倍左右,导致除沫器的穿孔动能因子超出正常取值范围。结合实际并在重新计算后调整了除沫器旋流板组件的结构参数,使除沫器的穿孔动能因子在运行过程中处于正常取值范围,且现场实施后叶片断裂问题得到根治,取得了良好的效果。

In the black water treatment of GE coal gasification process,the blade of cyclone plate demister of high-pressure flash tank was broken many times during operation.Theoretical calculation and practical investigation were used to analyze and verify the initial design,process operation and equipment fabrication and maintenance of the demister.The results showed that the main reason of demister damage was the gas phase load flowing through the demister being about 1.5 times of the original design,which led to the demister perforation kinetic energy factor going beyond the normal range.Then,the structural parameters of the cyclone plate assembly of the demister were recalculated and adjusted in combination with the actual situation,so that the perforation kinetic energy factor of the demister was in the normal range during operation.After the implementation on site,the problem of blade fracture was eliminated,and good results were achieved.