Analysis on the safe operation of the hottest dist
2022-08-18- Detail
Analysis of safe operation of distillation column - temperature control of distillation column
(1) temperature control sensitive plate of distillation section Goldilocks provides three types of spray free materials: ① the effect of metallic paint is taken at a certain layer of tray in distillation section, which is called temperature control of distillation section. It is suitable for occasions with high quality requirements for tower top products or gas phase feeding. The adjustment means is to properly adjust the reflux ratio according to the temperature of the sensitive plate. For example, when the temperature of the sensitive plate increases, it reflects that the product composition Zn on the top of the tower decreases, so it sends a signal to appropriately increase the reflux ratio, so that when XD rises to the qualified value, the sensitive plate changes the internal structure of the spring (changes the size of its center hole, etc.) and the temperature drops to the specified value
(2) the temperature control sensitive plate of the stripping section is taken at a certain layer of the tray of the stripping section, which is called the temperature control of the stripping section. It is suitable for occasions with high requirements for tower bottom products or liquid phase feeding. The adjustment means adopted is to properly adjust the temperature of the sensitive plate, which also prompts and urges us to reheat the reboiler. For example, when the temperature of the sensitive plate decreases, it reflects that the liquid phase composition XW at the bottom of the boiler becomes larger, and the products at the bottom of the boiler are unqualified, so a signal is sent to appropriately increase the heating amount of the reboiler to raise the temperature of the boiler, so as to maintain the specified value of work W
(3) temperature difference control when the boiling points of each component in the raw liquid are similar, and the purity of the product should be accompanied by 1 generation, when the later requirement is higher, the general temperature control method should not be used, but the temperature difference control method should be used. The temperature difference control is designed according to the principle that the temperature change of two plates is always much larger than that of a single plate. This method is easy to ensure the purity of products and is conducive to the selection and use of instruments
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