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密封改造后冲洗方案有P11改为P11+P62.
泵输送介质“重质燃料油”;
改造前单封,机封频繁泄漏维修;端面磨损严重;
计划改造为单封,P11+P62;
改造增加P62的理由是:为了防止介质在密封端面冷凝、结焦,从而达到保证密封可靠运行的目的。P62的本意是“极冷液冲洗,冷却降温,,”而且P62冲洗的是密封背面,如何有效保证端面的洁净度问题。 这是个人的理解,不知是否正确,还请各位大神赐教。
API 中对P62的描述如下:
InPlan 62, a quench stream is brought from an external source to the atmosphericside of the seal faces. The quench streamcan be low-pressure steam, nitrogen, or clean water. It is used in selected single seal applications to exclude the presence of oxygen to preventcoke formation (for example, hot hydrocarbon services) and to flush away undesirable material buildup around the dynamicseal components (for example, caustic and salt services)
before and after modification
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