Is the tank designed appropriately?
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In the design, the tank for storing 2000 m3 of ethanol is equipped with a nitrogen seal; a condenser is installed on the top of the tank, and an igniter suppressor and a breather valve are added to the vent pipe of the condenser!
The function of a condenser should be to condense the material vapor into a liquid state during the venting process, so that it can be returned to the tank. Our storage tanks do not use this approach; instead, there is a condenser at the vent opening of the reactor, and the principle is the same.
This post was last edited by heartlake on 2015-5-13 at 14:23. A condenser seems unnecessary; a flame arrester and a vent valve are essential. Some also have a safety manhole.
I agree with the above commenter’s opinion; installing safety valves and flame arrestors is sufficient, there’s no need to install a condenser, right?
What I’m trying to say is that if it’s nitrogen-sealed, the amount of liquid material that condenses should be small!
That condenser shouldn’t be necessary, right?
The medium here is ethanol, and ethanol is highly volatile; I think it’s useful to add a condenser to reduce its evaporation.
Small condensers are also an option, such as those with spiral plates, which help prevent evaporation but require cryogenic temperatures; otherwise, the effect is not very significant!
The purpose of installing a condenser is to pass the environmental impact assessment, which is quite reasonable. We added a condenser to recover the gas from the methanol storage tank only during the environmental impact assessment acceptance process.
For equipment operating at atmospheric pressure, since it already has a breathing valve, there is no need to install an additional safety valve
All the methanol storage tanks I’ve seen are equipped with breather valves and safety valves; I haven’t seen any equipped with condensers. Every year, a significant amount of methanol is wasted due to the breathing action associated with the size of these storage tanks. Installing a condenser would help, but it won’t eliminate this waste completely. As for whether it’s cost-effective, it’s necessary to consider factors such as safety, efficiency, and environmental impact
When the pressure inside the tank is high, the breathing valve allows air to be released; when the pressure is low, it allows air to enter. With such a breathing valve, isn’t it unnecessary to install a safety valve on the tank as well? I don’t understand; please give a reasonable explanation. Learned* it
Generally, a flame-arresting breathing valve is used; a safety valve is not necessary.
We haven’t installed condensers here yet, so we’re not sure whether one is necessary for a tank of this size. It seems there is also a missing external fire release device. I’m not sure if a single-check valve can suffice for venting.
What’s the use of a safety valve? Isn’t a breathing valve sufficient?
This post was last edited by Wuhexi Júzǐ on 2015-5-26 at 16:45. The safety valve installed on a 2000-cubic-meter storage tank is not a safety valve in the strict sense; it is more accurately referred to as an emergency pressure relief valve (such as a pressure relief manhole or breathing manhole). It falls under the category of safety valves in a broader sense. Article 6.2.19 of GB50160-2008 requires that nitrogen-sealed storage tanks be equipped with emergency pressure relief facilities.