Seek gas-liquid equilibrium data for sulfolane and water

This post was last edited by Wang Liangyuan on 2015-7-13 at 15:54. Dear colleague: The temperature of the solvent regeneration tower does not need to be controlled. You can try controlling the liquid level and see. Try changing the heat input to the reboiler from series control to automatic mode. See if an increase in the temperature of the regeneration tower is caused by an increase in aged solvent, and also check whether the amount of regeneration solvent remains constant. The water addition rate and the steam volume for bottom stripping must be controlled stably; it’s best to manage the overall water balance for extraction properly. For further clarification: Is there any fluctuation in the vacuum level of your solvent regeneration tower?

Let me explain the situation: One day, while adding a humidity-enhancing solvent, the water circulation volume was quite high. Then the temperature of the solvent recovery tower dropped—by reducing the amount of steam used for stripping—the temperature of the solvent recovery tower still didn’t rise. Question: Under normal circumstances, reducing the amount of steam used for stripping will cause the temperature of the solvent recovery tower to rise a bit, but that did not happen this time. 2 How sensitive is the temperature of the solvent recovery tower (under conditions of stable liquid level and constant heating amount) to the amount of stripping vapor, the temperature of the stripping vapor, and the water content in the lean solvent?

Let me explain the situation: One day, while adding a humidity-enhancing solvent, the water circulation volume was quite high. Then the temperature of the solvent recovery tower dropped—by reducing the amount of steam used for stripping—the temperature of the solvent recovery tower still didn’t rise. Question: Under normal circumstances, reducing the amount of steam used for stripping will cause the temperature of the solvent recovery tower to rise a bit, but that did not happen this time. 2 How sensitive is the temperature of the solvent recovery tower (under conditions of stable liquid level and constant heating amount) to the amount of stripping vapor, the temperature of the stripping vapor, and the water content in the lean solvent? I wonder, where is the wet solvent from your device reprocessed? (Is the inlet for reprocessing the solvent regeneration tower?) ) It would be helpful if I had a PFD for your company’s equipment; it could assist you. Taking your mentioned data separately, the first point is correct: when the stripping volume is low, the bottom temperature of the solvent recovery tower will increase to some extent under a constant heating level. However, in most cases, the low temperature in the solvent recovery tower is automatically controlled, which ensures greater stability. I’m not sure what happens to the reduced amount of stripping gas you mention – where does that reduced volume of gas go? Our company’s extraction unit uses the waste heat from the lean solvent to regenerate a portion of steam (only 1.2 kilograms). This steam is sent partly to the solvent regeneration tower (where it eventually returns to the solvent recovery tower) and partly directly to the solvent recovery tower. There is also point 2: our company focuses on stabilizing the low temperature in the solvent recovery tower, without controlling the liquid level; as long as the liquid levels of the other equipment remain stable, the liquid level in the solvent recovery tower is not monitored. The extraction unit is a device with many variables, especially regarding the components; when these components change, various parameters change significantly. The process operation manual also mentions on multiple occasions the impact of changes in components, solvent moisture content, hydrocarbon content on operations, as well as the impact of pressure on operations. Moreover, the low temperature in the manually operated solvent recovery tower also has a certain impact on the operation of reprocessing solvents. If there are changes in the components at the bottom of the solvent recovery tower (changes in the stripping steam, which may contain hydrocarbons or other substances). It has a significant impact on operations.

How is the humidifying solvent introduced into the solvent recovery tower? Is the vapor drawn from the top of the recovery tower of satisfactory quality? We introduce the humidifying solvent through the feed line of the extraction distillation tower; since wet solvents contain many impurities, adding it from that location makes it less likely to affect product quality. On top of that, it reduces the impact that wet solvents can have on system stability.