Effects of the distribution of mid-stage reflux in atmospheric distillation and changes in reboiler temperature
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What is the function of the backflow at each intermediate stage in schools such as Changdingxun, Chang No.1 Middle School, and Chang No.2 Middle School? And what are the appropriate proportions for their heat extraction? What should the return temperatures be?
There is no fixed ratio for this; it is adjusted based on the load of the equipment and the product control strategy. From an energy-saving perspective, it is better to extract as much heat as possible from Unit 2, but extracting too much heat from Unit 2 affects the yields of Units 1 and 2