筛板塔精馏实验（Distillation experiment of sieve tray tower）.docVIP

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筛板塔精馏实验（Distillation experiment of sieve tray tower）.doc

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筛板塔精馏实验（Distillation experiment of sieve tray tower）

筛板塔精馏实验（Distillation experiment of sieve tray tower） Experiment five distillation experiment of sieve tray tower First, the purpose of the experiment 1. to understand the structure and distillation process of sieve plate distillation column; 2. familiar with the operation of sieve plate distillation column; 3. master the measuring method of distillation tower efficiency. Two. Basic principle of experiment 1. tower efficiency Plate tower is an important gas (steam) liquid mass transfer equipment with large amount of use and wide range of application Factors such as throughput, plate efficiency, resistance drop, operation flexibility and structure are discussed. A wide variety of trays are currently emerging Bubbling tray (tray, float valve plate) and jet tray (tongue, inclined hole, mesh) is used in the industry Multi plate tower as gas and liquid mass transfer equipment can be used either for absorption or for rectification. Much more is used for rectification Operate. In the distillation unit, the tray is the contact area of vapor and liquid. In a plate fractionating column, the mixture The steam rises as the plate rises, the return liquid drops along the plate, and the vapor and liquid phases meet in the upper layer of the tower plate to achieve mass transfer and heat transfer So as to achieve the purpose of separation. If on a tray, the rising steam is in equilibrium with the falling liquid The plate is called a theoretical plate. However, in actual operation, the contact time between the vapor and liquid phases on the tray is considered The influence of the factors such as the finite and the plate mixing, the vapor and liquid phases have not reached equilibrium The separation effect of the plate is less than that of a theoretical plate, so the actual plate number needed for the distillation column is higher than that of the theoretical plate If the actual plate number is NP and the theoretical plate number is NT, then the total tower efficiency is ET: ET= (NT /N