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1·Mechanical impurity, colloid, iron, animalcule, algae and organic compound are the objects to remove by the pretreatment.

预处理系统的处理对象主要是进水中的机械杂质、 胶体、 铁、 微生物、 藻类、 有机物等。

2·Impurity pump mechanical seal after static test, the operation of high-speed rotation of the centrifugal force generated will inhibit the leakage of media.

杂质泵用机械密封经过静试后，运转时高速旋转发生的离心力，会克制介质的泄露。

3·Main reason for frequent failure on mechanical seal of low boiling column bottoms in the production of methane chloride is due to impurity entry and airproof structure, unreasonable material.

对甲烷氯化物低沸塔底料泵机械密封频繁失效进行了分析，主要原因是物料中杂质进入和密封结构、材料不合理等。