Is the return flow rate of the tower designed in advance?
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When the plant starts up, how should the reflux rate of the tower be set? For example, part of the liquid in the top reflux tank is used for reflux while another part is sent outside; how is the reflux rate determined? Is it all designed in advance? At the start of production, the backflow rate is initially set based on the data provided by the design institute, and then adjustments are made according to the quality requirements of the product? Please everyone share your thoughts
The last edit to this post was made by hbtmmsc on 2022-12-19 at 16:07. First of all, it should be noted that the reflux ratio is generally determined through prior process calculations or computer simulations. During actual production, the reflux ratio needs to be adjusted in practice when the system is started up; initially, full reflux is used, and product extraction begins only when the material concentration inside the tower meets the process requirements. It is at this point that the concept of reflux ratio comes into play. Once all the basic parameters have stabilized, the reflux ratio is adjusted to achieve overall thermal equilibrium in the tower, at which point it can be considered relatively stable. In reality, the ultimately stable reflux ratio is merely a range value rather than an exact figure. Additionally, it must also change in response to variations in the temperature and pressure of the heating source, changes in the concentration and temperature of the feed material, and changes in the temperature of the cooling system at the top of the tower