This paper deals with the treatment of arsenic_containing waste water in the purificationsection of sulfuric acid unit, and its process and mechanism are also introduced.
Redundant high-pressure interlocks cut off feeds to the EO Reaction Section and all heat sources to the Ethylene Oxide PurificationSection far below the relieving pressure.
冗余高压连锁切断了向环氧乙烷反应工段的供料，以及供至远低于泄放压力的环氧乙烷净化工段的所有热源。
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Initial investigations indicated that the accident aboard the hunter-killer submarine involved a piece of air purification equipment in its forward section. It caused only superficial damage.