The liquid in the iron barrel sprayed out
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The facility has many iron tanks (similar to large gasoline tanks) that store less than 200 liters of chlorofluorocarbons, with a boiling point of around 33 degrees. The opening of the iron barrel is at the top; it’s a threaded opening with internal threads, and its diameter is approximately 50 mm. It’s hot in summer now, and there is pressure built up inside the iron tank; when the lid is opened to take out the liquid, it often sprays out to a height of 1-2 meters. The manager said that the sealing lid on the outlet needs to be modified by adding a small opening to it; when drawing liquid out, this small opening is opened first to release the pressure inside the tank (so that no liquid sprays out), and then the larger opening is used to take the liquid. Please give some suggestions on how this small opening should be designed to meet the requirements
Is there no pressure when the small opening is first opened? ? ! ! !
If there is pressure and a small hole is opened, gas will definitely be released, which is acceptable； But I don’t want the liquid to spray out……
The small orifice diameter is about 8~10 mm; you can use a needle valve to open it slowly and release the pressure gradually.
This post was last edited by wuchangjian on 2015-7-3 09:55. You should install a valve with a screw mechanism at your material extraction port; before extracting the material, slightly open the valve to release pressure. In your case, it will likely take some time to release the pressure, so after that open the valve and then proceed with extracting the material. Since your port is relatively small, there really isn’t much that can be done about it. Or you can enlarge this material intake port and install a blind plate ； Two holes are made in the blind plate: one for the pressure relief valve and the other as a new material intake.
It seems really dangerous with your company’s product – are you sure it won’t explode? It’s best to have a pool nearby to help cool things down. . . Also, when installing a pressure relief valve, the cover must be removed first, after which the welding joint is made, or the valve is installed by threading directly. The temperature is so high. ,.,., Won’t some of it evaporate?
For a 200L tank, it is recommended to cover it with a tarpaulin or sunshade even when stored outdoors. When opening it, turn the lid off slowly, just like opening a Coke bottle. You can also choose to empty it first, provided that the tank is being reused; in that case there’s no need to add anything. Just call the person who sells barrels and ask for a quote, right?
If possible, change it to discharge from the bottom
Spray with cool water at a temperature below 15°C
Adding something to the barrel carries a high risk. Because if it’s a threaded connection, it’s too thin to be used ； If welded, it’s more difficult and prone to explosion. A plug can be welded onto the lid, with M20*1.5 threads on the inside, and a pressure gauge valve (with an inner diameter of 4 mm) connected to the outside. This way, no problems will arise during processing. When in use, first open the valve to release pressure, and then unscrew it to remove the liquid.
The landlord should pay special attention to the opinions from floors 6, 7, and 9. This is no longer just a matter of whether it’s convenient to draw out the liquid; if the temperature is any higher, there’s a high risk of the tank bursting and causing an accident. If possible, place the bucket under a ventilated and shaded canopy; if that’s not feasible, cover it with thick canvas, and assign someone to water it regularly to keep it cool. If the temperature of the tank is not high, the material does not vaporize, and therefore no pressure is generated, which fundamentally solves the problem of liquid extraction and spraying.