Sharing on steam vacuuming systems
Thread Content
This post was last edited by I am kind on 2015-11-17 at 11:14. In vacuum distillation, a vacuum system is installed on the overhead distillation line to continuously remove the gases from within the tower, thereby maintaining a vacuum level inside it. Tower top vacuum = Atmospheric pressure – Residual pressure inside the tower. http://bbs.**.com/data/attachment/forum/201506/01/102944f2k3pp834zkf9l3y.jpg zqczk01.jpg (204.36 KB, Downloads: 1) Download the attachment and save it to your album. Uploaded on 2015-6-1 at 10:29. Figure 2-8: Steam vacuuming system. The vacuuming system used in Lanlian Refinery relies on steam ejectors; its basic working principle involves the expansion of high-pressure steam inside a nozzle, which converts this energy into kinetic energy and results in fast flow, thereby creating a vacuum around the nozzle exit. The non-condensable gases, water vapor, and the small amount of oil vapor that come out of the top of the vacuum tower first enter the primary condenser. After the water vapor and oil vapor condense, they are discharged into the water seal tank, while the non-condensable gases are drawn off by the primary ejector and sent to the secondary condenser. There, the water vapor and oil vapor also condense and are discharged into the water seal tank; the non-condensable gases are then removed by the secondary ejector and released into the atmosphere. Generally, a two-stage vacuum is employed. As shown in Figure 2-8, as the pressure inside the tower decreases, the high-boiling heavy fractions can vaporize and be distilled at temperatures lower than their normal boiling points. The residual pressure at the top of the tower is 47 mmHg, and the cutting point for the oil obtained through vacuum distillation is between 520°C and 540°C. There are two types of vacuum distillation towers: those designed for fuel and those designed for lubricating oils. The distillation tower at Lanzhou Refining & Chemical Company is of the lubricating oil type, and it requires high precision in separation. The vacuum-distilled oil is divided into 5 narrow fractions, with each fraction having a boiling range within 50°C; there are also specified requirements regarding viscosity, color, residue, and evaporation losses. To meet the needs for producing lubricant base oils. Lubricating oil-type vacuum distillation must achieve \"low furnace temperature, low residual pressure, low pressure drop, high efficiency, and high quality.\"
We also have a similar steam vacuuming system on our catalyst tank; I’m not sure if it works on the same principle
Is there any information available on the calculation of the steam volume required for steam vacuuming? :lol
One of their functions is merely to provide different suction forces; nowadays, three-stage water ring pumps are used in both atmospheric and vacuum distillation units to reduce steam consumption
Good question. . . . . . . . . I want to know too
Our plant consists of a water return pump and two Roots pumps. I’m a new employee and don’t understand it very well yet
Our company recently added descaling agents to the heating furnace, and the temperatures at the furnace bottom, in the furnace chamber, and in the exhaust gases all decreased significantly. This ensures the long-term and efficient operation of the heating furnace. The filling process uses wind to introduce the dust remover. May I ask if the principle here is the same as that of using steam for vacuuming?
Hehe, in principle it should be similar.