The invention discloses a method for replacing nitrogen and dry air in an isolation empty cabin of a cargo hold of a chemical tanker. The method specifically comprises the steps of installing an air pipe, a nitrogen pipe and a vent pipe on the isolation empty cabin; injecting nitrogen with lower density into the upper part of the isolation empty cabin through the nitrogen pipe so as to enable airwith higher density at the lower part of the isolation empty cabin to be exhausted from the air pipe and replace nitrogen in the isolation empty cabin; injecting air with higher density into the lowerportion of the isolation empty cabin through the air pipe so as to enable nitrogen with lower density on the upper portion of the isolation empty cabin to be exhausted from the nitrogen pipe and replace air in the isolation empty cabin. According to the invention, the replacement efficiency of the inert gas in the isolation empty cabin is improved by utilizing the density difference, the gas replacement time is saved, and the gas consumption is reduced at the same time.
本发明公开了一种置换化学品船货舱隔离空舱内氮气和干空气的方法,具体包括以下步骤:在所述隔离空舱上安装空气管、氮气管和透气管;过氮气管将具有更低密度的氮气注入隔离空舱的上面部分,以使隔离空舱下面部分的具有更高密度的空气从空气管排出,置换隔离空舱内的氮气;通过空气管将具有更高密度的空气注入隔离空舱的下面部分,以使隔离空舱上面部分的具有更低密度的氮气从氮气管排出,置换隔离空舱内的空气。本发明利用密度差来提高隔离空舱内的惰性气体的置换效率,节省了气体置换的时间,同时减少了气体的消耗量。
Method for replacing nitrogen and dry air in isolation empty cabin of cargo hold of chemical tanker
一种置换化学品船货舱隔离空舱内氮气和干空气的方法
2020-10-09
Patent
Electronic Resource
Chinese
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