At normal pressure, heat removal mainly relies on top cooling reflux, top circulation, primary circulation, and secondary circulation. What are the typical proportions of heat removal in theory and in practice?

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Should I ask about process-related questions here? Seeking advice~~ For normal-pressure heat extraction, the main methods include top cooling reflux, top circulation, primary circulation, and secondary circulation. What are the typical ratios of heat extraction in theory versus in practice? http://bbs.hcbbs.com/thread-1566241-1-1.html For normal-pressure heat extraction, the main methods are top cooling reflux, top circulation, primary circulation, and secondary circulation; what are the usual ratios of heat extraction in theory and in practice? Is it usually gradually increasing from top to bottom? Theoretically, how is it appropriate to allocate this heat extraction? Since all the intermediate stages at atmospheric pressure exchange heat with the feedstock, the heat obtained from the reflux of these stages is used to heat the feedstock in its entirety, even if the proportion isn’t optimal. But what about other distillation units? If only one intermediate stage exchanges heat with the feedstock while the others are used to generate steam or for cold water condensation, then how should heat be extracted in such cases? Thank you~