Why is the catalyst in the tower installed in sections? Can’t it be installed all at once?
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Why is the catalyst in the tower installed in sections? Can’t it be installed all at once?
This post was last edited by ylb913 on 2015-8-9 21:20; segmenting allows for the secondary distribution of fluid in order to avoid flow deviation and short circuits.
If it’s a gas, is it also secondary distribution?
Actually, I’ve only seen the secondary distributor in the gas phase. There is a lift pipe at the top of the packing, which then leads into a space without packing, and from there it goes to the next section of packing.
Manually assigned~! ! ! !
We also need to consider unloading!!!!!!
There are also issues with reassigning cones, particularly problems with fragmentation due to height when loading in bulk
The pile is built too high, which results in excessive weight; as a consequence, the catalyst at the bottom gets crushed, given that the strength of the catalyst has limits.
The main purposes of catalyst segmentation are: first, to reduce the bed resistance; second, to redistribute the reaction gases; third, segmentation allows for the adjustment of the reaction temperature in each section, thereby increasing the driving force for the reaction and enabling it to proceed more fully.
The answer above is quite detailed; it’s mainly aimed at protecting the catalyst itself as well as ensuring segmented catalysis.
Multi-stage catalysts are beneficial for catalytic efficiency. Assume a catalytic conversion rate of 60% in the first stage, 60% in the second stage... The amount of material without catalysis = (1-60%) raised to the power of n; if there are four stages of conversion, the catalytic conversion rate reaches 98%