Help question-Analysis of the causes of rising around the floor of the normal pressure storage tank
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Yesterday, the workshop filled a normal-pressure flat-bottomed cone-top storage tank (15m3) with nitrogen to make it airtight. The pressure was only 0.01MPa, which is basically a slightly positive pressure. There was actually a phenomenon of warping around the bottom plate. I really don’t understand. Ask experts to analyze the reasons or propose measures. Thanks. Hunan Chemical Engineering * 2020.7.11
During pressurization, the axial pressure of nitrogen along the height of the cylinder is much greater than when the tank is in normal use (normal pressure). The bottom plate is under pressure, and the cylinder is stretched along the axial direction, and the edge will be stretched and deformed by the cylinder, causing it to tilt upward.
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This should be a phenomenon of internal pressure rising.
Haha, the term "overpressure" is based on the bearing capacity of the equipment itself. Also, for equipment with particularly low pressure like this, it is best to have a blowout point for observation. Also, the range of the pressure gauge used is something special that should be paid attention to. Pressure gauges with large ranges cannot be used. For reference.
That's right ٩(๑^o^๑)۶
It is very common for this phenomenon to occur
In 2007, we had a 1,000-liter conical flat-bottomed fixed-neck tank. It was also because it was airtight. After the shift was handed over, the person who took over forgot to inflate the tank. As a result, we heard a loud abnormal noise. When we arrived at the scene, we saw that the inflated tank was about to take off. The bottom of the tank The nuts on all the fixed bolts have all fallen off, the threads on the screws are gone (two nuts are provided on each screw), the bottom plate is all tilted up at a large angle, and the ladder connecting the top tanks to the tanks is also broken, but the tank itself is not cracked. The entire tank was scrapped. At that time, no professional personnel analyzed the cause. Personally, I thought it was caused by the buoyancy generated after inflating. Experts analyzed that the damage was caused by the axial force generated. * .