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板式换热器设备出现堵塞与结垢可以这样处理

作者:板式换热器来源:未知2019-12-26 17:25
摘要:堵塞 直径大于1.5~3mm颗粒杂物容易阻塞板片通道,板式换热器的流道间隙较小(2.5~6mm.使设备的压力降急剧 恶化,导致设备因堵塞而换热能力大幅降低,严重的造成装置连续生产中断。所以根

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  板片组装后形成了多缝隙结构.局部富集水平往往远远超越了不锈钢自身抗应力腐蚀的能力。介质中的腐蚀元素(ClS等)可能大量附着于污垢。 3、当板片表面的污垢严重时.并在垢底缝隙处富集。 4、密封槽底中的有害元素往往是粘结剂中的Cl-因温度升高而析出来的如氯丁胶系列的粘接剂、压缩石棉(含有 CaCl2.析出的富集Cl-与H+形 成HCl,使槽底缝隙处发生严重的应力腐蚀开裂。

         经过一定的腐蚀孕育期,板片缝隙在外表剩余应力、Cl-富集水平及温度等条件下.就有可能发生应力腐蚀开裂。板式换热器的选材、装置及使用过程中设法破坏上述任一条件,都可有效地防止或延缓腐蚀发生,使设备平安正常地运行。为此,正确选用资料,定期清垢以破坏腐蚀的生成条件和孕育期,选用非氯元素的粘接剂,这样可在一定水平上有效防止应力腐蚀。其它问题不能使用盐酸(HCl或盐酸 类的清洗剂和清洗粉末进行化学清洗。 1、对于不锈钢板式换热器.这是由于未充沛溶解垢 渣(含有残存氯)多缝隙的结构中是很难冲洗干净的,碱中和 也不可能充分进行。适当加温可提高清洗效率。可采用硝酸加缓冲剂或硝酸类的清洗剂、清洗粉进行清洗.应防止焊线搭在设备。 2、装置设备配管时.而应搭在配管的管道上,以防止焊线电流使板片内触点处被击穿。这一问题 有些公司的设备装置过程中曾多次发生。


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