阻火器原理及类型,清理频率.ppt

CSPC FA (Flame Arrester) inspection procedure introduce Content of instruction Principle FA type (PhotoDrawing) Failures model Inspection check list Cleaning methord Inspection record Inspection interval Principle Piping FA 管道阻火器适用于加热炉、裂解炉、燃气锅炉等，因为这些炉子都用可燃气体作燃料，由于操作上的失误或泄漏，易于造成输气管道回火而引起工艺装置爆炸的危险。为防止回火爆炸应安装加热炉阻火器。它安装在燃气主管和油气输送管线上，其回火距离（火源至阻火器距离）不大于10m。 加热炉阻火器应用于管道上，因此亦属于管道阻火器，它有别于储罐阻火器 Difference 管道阻火器 1.气体为流动状态 2.回火距离可超过10米以上 3.阻火器能承受2.4Mpa压力 4.能阻止火焰传播速度达几百米或上千米 储罐阻火器储罐阻火器储罐阻火器储罐阻火器 1.气体为静止状态 2.回火距离不超过1.5m 3.阻火器只能承受0.9Mpa压力 4..只能阻火大于45m/s的火焰通过 FA Photo and Type Tank Dry FA Piping Dry FA in Normal size 管道或地罐挥发气的阻火器 拆卸方便,结构简单 必要时需更换内件 阻火片易变形 不易清洗 Piping Dry FA in Small size 拆装迅速,结构简单 必要时需更换内件 阻火片易变形 不易清洗 Piping Dry FA in Packing way 拆装迅速,结构简单 必要时需更换内件 不易清洗 Piping Dry FA in Packing way 管道或水下挥发气的管线上的阻火器 拆装迅速,结构简单 必要时需更换内件 不易清洗 Failure model 堵塞失效(小孔内有灰尘,聚合物,工艺颗粒,鸟巢) 阻火片变形 阻火片腐蚀 防爆壳体腐蚀 装配不当的失效 安装方向不对 Hydro Packing FAfailure model Hydro FA 封液液位过低 封液污染 封液起泡 壳体腐蚀 分配器堵塞 Packing FA 填料磨损 内有聚合物 内部间隙堵塞 分配器堵塞 Inspection check list Plate type FA Visual inspection for inoutside shell Inner element’s physical damage , plugging ,corrosion Shell pressure testing (Optional) Gas flow direction checking HydroPacking type FA Proper liquid level, Seal fluid contaminant Foam Vessel corrosion Distribution pluggage Packing attrition,corrosion, fouling or plugging Distributor condition Cleaning Methord Inspection Record Need bellowing information Checking result Checking scope Checking date Inspection interval Many companies perform inspection and maintenance at least once annually unless operating experience indicated that the inspection period should be changed. Instruction book for all type of FA have recommended inspection period. LOP Unit Tyco FA instruction book mentioned as below: * 石油及其下游产品产品储罐上的阻火器 重量沉,位置较高结构复杂,需大型吊车协助 内件可单独更换 易清洗 Steam blowing Steam mix DM water blowing Solvents Compressed air Ultrasonic Detergent Un