Will the catalyst tank in a catalytic cracking unit get flattened during the process of applying negative pressure?
Thread Content
The last edit to this post was made by gaodi913 on 2016-12-12 at 12:11. I would like to ask the experts: Do the catalyst tanks in a catalytic cracking unit get collapsed during the process of applying negative pressure?
I just saw someone asking yesterday about the number of reinforcing rings outside; these are used to increase its pressure resistance. In short, it is a matter of the relationship between the maximum negative pressure suction capacity and the device’s tolerance to negative pressure.
In other words, with the reinforcement ring in place, it won’t get deflated from a design perspective, even under the highest possible negative pressure? Is that so?
This post was last edited by ylb913 on 2016-12-11 at 21:04. Reinforcing rings are included in the design as well, taking into account the ability to withstand negative pressure. Either increase the wall thickness of the equipment, but doing so requires a much larger investment compared to adding support rings. In equipment design, the wall thickness is often first determined based on the ability to withstand positive pressure, followed by a strength check; sometimes this results in an additional few millimeters of wall thickness, and other times it involves local reinforcement rings. In the calculation of a device’s ability to withstand negative pressure, there is a term called \"instability\". This is yet another set of algorithms and formulas that combine theory with practice in a very systematic way.
I passed by and learned about it; it seems that intensity calculations are required for this.
Under negative pressure, to calculate the stability against external pressures, the thickness of the cylinder may need to be increased or reinforcement rings added to prevent unstable deformation.
At atmospheric pressure, a tank can easily be deflated without negative pressure calculations and proper piping connected to the atmosphere.
Check whether the design pressure takes into account the vacuum condition