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What is the principle of the unloading crane pipe? What’s the purpose of setting it?

2016-06-14View Original

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What is the principle of the unloading crane pipe? What’s the purpose of setting it? Could someone provide a flowchart or something similar for the unloading process using a crane pipe? Thank you very much!
Reply #22016-06-14
This post was last edited by Xiaonian Gao on 2016-6-14 at 16:47. The crane pipe is extremely simple – there’s no flowchart involved; it just consists of two pipes and a support column, used solely for loading and unloading vehicles
Reply #32016-06-14
http://baike.so.com/doc/1748688-1848801.html A swan tube is a type of movable pipe; there’s no special principle behind it. Things that can be found by just searching on Baidu – why ask them here? The members of this forum aren’t your personal servants
Reply #42016-06-14
I agree with you. Although there are differences in when one starts and in the amount of experience one has, some information is available online and can be obtained easily. Those issues that truly pose questions, have inconsistent opinions on them, or are difficult to resolve should be brought up for discussion by everyone.
Reply #52016-06-15
Sir, is the one on top used for loading, and the one below used for unloading?
Reply #62016-06-15
This post was last edited by Xiaonian Gao on 2016-6-15 09:45. The one below is the loading/unloading pipe, and the one above is the return air pipe. Baidu knows all these things; talk to Baidu more often – many of the questions you ask are basic chemical engineering knowledge.
Reply #72016-06-15
Is the return gas pipe the same as the gas-phase equilibrium pipe? What is the purpose of the return gas pipe? I’m foolish; please forgive me!
Reply #82016-06-15
That’s right, it’s the vapor equilibrium pipeline. The purpose is that during unloading, as the amount of liquid in the tank decreases, the pressure drops accordingly; the pump can no longer draw out the liquid from inside. At this point, it is necessary to add oil and gas to the tank in order to balance the pressure there. The same is true during loading: the feed into the tank vehicle compresses the gas phase space inside it, which leads to an increase in pressure. At this point, it is necessary to release oil and gas outward in order to balance the pressure inside. I see you’re an experienced sailor; why are your questions all about the most basic chemical engineering knowledge? Haven’t you been exposed to the chemical industry before?
Reply #92016-06-15
I’m impressed by the original poster! ! ! You can ask about things that aren’t in the books; you can ask about things that aren’t available online or that aren’t clear enough. But you still ask about some of the most basic things, things about which there’s no doubt at all! ! Take a look at the posts posted recently

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