3脱硫设备运行常见问题及解决方法.ppt

* * * * * * * * ME faces refer to the front and back side of each installed ME. Normally all faces are washed except the back side of the final ME because the wash water will end up in the outlet duct. Wash coverage refers to the amount of overlap that occurs from the wash spray of adjacent wash nozzles. A correctly designed wash system will have 150 to 200% overlap. Wash intensity and pressure are measures of the amount of water and pressure used for washing. Typical design values are 1.5 gpm per square foot of ME surface for wash water intensity, and 40 to 50 psi for wash pressure. * * * * * * * * * * * * * * * * * * * * * * * * This table presents a number of possible causes for poor SO2 removal, the analytical indication that will help identify the cause of the poor removal, and the suggested corrective action to correct the problem. Poor SO2 removal is defined as removal that is less than the design value for the particular operating conditions. * * Acid insolubles (A.I.) refer to the portion of the scrubber solids that are insoluble in a strong acid solution. Some FGD engineers and chemists refer to acid insolubles as inerts. The source of A.I. is either fly ash entering the absorber, or the limestone. * * * * * * * * * * * * * 该过滤器装在浆液排出管至旋流站入口管道上，有效地过滤了进旋流站的杂质。 * NCEPU 7.烟道非金属膨胀节的选型与安装 防腐型非金属膨胀节结构示意图 由于脱硫系统的烟气中带有一定量的水份，烟气温度较低时，水份便凝结成水，沉积在膨胀节空腔中，即使在非金属蒙皮上设置疏水口，但由于运行时蒙皮的不规则底部形状以及疏水口的数量限制，也无法将沉积水完全排出。酸性的水不仅会腐蚀金属框架的防腐层，而且也不断腐蚀非金属蒙皮。同时酸性的水可能从蒙皮与防腐层的接合面渗漏出来。所以仅通过将蒙皮处螺栓拧紧，也无法保证接合面不渗漏。所以非金属膨胀节的结构和非金属蒙皮内衬材料的选择是否合理将直接影响非金属膨胀节的耐腐蚀性和是否渗漏。 该膨胀节结构简单，金属框架的制作和防腐等费用便宜、运输施工方便。该结构的非金属蒙皮安装后，非金属蒙皮基本与管道平齐，凝结水不易沉积。 非金属蒙皮的材料，如氟橡胶纤维布、聚四氟乙烯PTFE、玻璃纤维布等，厚度较厚，具有较好的强度，同时具有较好的耐腐蚀性。 * NCEPU 无金属框架，不需做框架防腐。运输，安装，更换方便 * NCEPU 膨胀节安装中的问题 两扁铁之间存在间隙，且还下垫一扁铁使连接处不平。加上蒙皮又压得不平，极易发生泄漏。 * NCEPU 带金属框架的膨胀节现场涂鳞防腐往往做不好，安装也不方便 * NCEPU 运输时的包装不宜压折，这对浸橡胶的补偿材料有损 * NCEPU 由于包装不当，玻纤材料已坏。 * NCEPU 包装太差，压折和铁丝在安装和运输时会损坏玻纤材料。玻纤材料都翻在外了。 * NCEPU Not so tight and strong in the edge as to easily leakage。 包边