Introduction to the stripping tower

Thread Content

Introduction to Stripping Towers: Stripping towers operate on the same principle as distillation towers and are primarily used for the separation of gas-liquid mixtures. In their simplest form, liquid enters the tower continuously from the top, while gas rises from the bottom and is blown into the liquid layer, thereby carrying away the components that need to be removed from the liquid phase. Stirred-tank distillers are classified into the following categories depending on their purpose: 1. Separating gas and liquid substances by utilizing differences in solubility. The principle of a stripping tower is the same as that of a distillation tower; mass and heat transfer occur through the contact between the gas and liquid phases on the trays, thereby separating components with different volatilities. II. By direct contact with water vapor, the volatile substances in the liquid to be stripped diffuse into the gas phase in a certain proportion, thereby achieving the separation of low-boiling-point substances from the liquid. Stripping towers are widely used in the chemical industry to separate a wide variety of materials. The purpose of stripping is: 1. to make the purity of the liquid to be stripped higher. 2. Recover the useful components from the recycled stripping liquid. 3. When treating wastewater, volatile toxic and harmful substances in the wastewater are dispersed into the gas phase in a certain proportion, thereby achieving the goal of separating pollutants from the wastewater. III. Medium-pressure steam is introduced from the bottom of the tower, while the condensate is introduced from above; the medium-pressure steam is used to remove the gases present in the condensate. By bringing the inert gas into contact with the absorbent solution in the reverse direction (over as large an area as possible), the components dissolved in the absorbent solution are separated, thereby regenerating the absorbent solution. IV. Mass and heat transfer are achieved through the contact between the gas and liquid phases on the tray, thereby separating components with different volatilities. Gas lift utilizes an inert gas to reduce the vapor pressure of the solute, thus achieving the regeneration of the solvent. The gas used for stripping is an inert gas, typically water vapor or nitrogen. V. Stripping is a physical process in which a new equilibrium state is established by disrupting the vapor-liquid equilibrium of the original system, thereby achieving the separation of substances. For example, A is a liquid and B is a gas; B dissolves in A to reach a gas-liquid equilibrium state, with the gas phase mainly consisting of component B. When a stripping medium C is added, the partial pressure of B in the gas phase decreases, thereby disrupting the existing gas-liquid equilibrium. B will then diffuse from the liquid phase to the gas phase to achieve a new equilibrium. By adjusting the amount of the stripping medium, it is possible to control the degree of stripping and separate A from B. To ensure the purity of A and B, A or B can be used as the stripping medium. Schematic diagram of the stripping tower