1、板式换热器依据水质的不同选用不同的材质。它能够由不锈钢304制成,但假如你所在区域的水中有太多的氯离子,你需求316L。另外,冷却水中的杂质不宜过多。不得有可见的杂物。
2、氯离子含量不宜过高。假如含量过高,加上不锈钢换热器内温度高(假如是蒸汽换热器,温度或许到1450),板间流速低,容易发生晶间腐蚀。一般预计控制在500ppm,电导率低于2000us。假如含量过高,则不能使用SS304。试试316L或其他。
3、缩放的作用也需求考虑。假如原水硬度过高,在高温下容易析出碳酸钙,影响换热效率。清洁很麻烦。不过,一般循环冷却水或许比较好。归于软化水和纯净水,也有阻垢剂。取决于浓度倍数。
4、不锈钢换热器一般选用316L、SMO254等防腐材料。为防止冷却水侧结垢,影响循环水量和换热效率,循环水中常增加杀菌剂、缓蚀阻垢剂等化学物质。目前化学药品种类繁多,在增加时应考虑对板材的影响。
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