Polypropylene double-loop tube process
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In the polypropylene double-loop tube process, there is a temperature difference display for the cold water supply and return ports of the smaller loop. What is the purpose of this temperature difference display? Thank you
I think it should serve as a proofreading function
This temperature difference is used to calculate the polymerization heat inside the small loop tube. Thereby obtaining the polypropylene yield in the small loop tube. In accordance with the requirements of the spheripol process for controlling the release of catalyst activity, it is generally kept at 150 gPP/gCAT.
Monitor the degree of pre-polymerization, as different catalysts require different levels of pre-polymerization. Based on the catalyst reaction activity and the particle morphology of the final product, the propylene feed can be fine-tuned to alter the degree of pre-polymerization.
Once the temperature difference and flow rate are calculated, the energy is obtained, right!
There is a temperature difference, but sometimes it seems that there is no flow of chilled water; this could be due to a problem with our flow meter. I think the temperature difference can, to some extent, reflect the performance of the small reactor, as the calculations related to its operation are based on the heat of reaction, using specific formulas. From a process perspective, feeding 3 tons of propylene at 10 degrees Celsius into the small reactor results in a large amount of heat being removed, so not much chilled water is needed. This is especially evident in winter
By using the temperature difference, the heat of polymerization can be calculated and the degree of pre-aggregation can be determined; however, I feel that this method isn’t very effective, especially since in winter the valves for circulating chilled water are generally kept closed.
Thank you all for your help:lol
Calculate the heat of aggregation. But sometimes it’s not very accurate. Plus, my factory doesn’t have a chilled water flow meter.
It is used to visually represent the uniformity of the reaction within the tubular reactor.