How to wash the tower in catalytic unit distillation
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Recently, due to the high temperatures, the pressure in my catalytic distillation tower has been high. There have been multiple instances where the C5 liquefied gas product did not meet the required standards. Increasing the reflux flow at the top of the tower and using all of the feed available for feeding into the tower did little to stabilize the situation; I suspect salt buildup on the tower trays, as the tower has been in operation for 2 years now. Now, consider stabilizing the washing tower. The tentative plan is as follows: the liquefied gas in the stabilizer’s reflux tank is sent to the atmosphere, while fresh water is pumped into the reflux tank using a liquefied gas pump (there is a corresponding process for this). Water is then fed into the top of the tower via reflux. Once the temperature in the middle section of the tower drops, the process is complete. The water enters the tray sections, flows down to the middle section, and then returns to the top of the tower to enter the reflux tank. There is no similar operation; I’ve heard about it from others. I would like to ask the experts: Has anyone ever cleaned a stabilizer tower? What are the precautions to take? Is the proposed approach feasible?
I tried it, but it failed; the key issue is that the temperature of the towers is difficult to control
This is the flushing of the stabilizer tower for a stable absorption system, right? The flushing of the distillation tower is difficult to control; this one is relatively easier. First reduce the load, then gradually increase the water injection volume; pay attention to the temperature and keep the water at a level such that it can be drawn out at an intermediate stage. Rinse for a period of time, and take samples to analyze the rinse water. Instead of ending it, gradually reduce the water injection volume and increase the load, while paying attention to dehydration
The top of the fractionation tower is washed with brine; after washing, demineralized water is used. The stabilization tower has not been washed, but it is recommended to use demineralized water, as using fresh water can easily lead to scaling inside the tower
Let’s clean the air-cooling tube bundles – for oil-gas air cooling and rich-gas air cooling
Thank you all. The main issue is that the product does not meet the required standards; we would like to clean the tower, but it seems very difficult to do so. We can only clean the middle part of the tower, after which the vapor returns to the top of the tower. The pressure cannot be controlled, and there is a risk of venting through a flare.
What is the temperature in the stabilizer after cooling? The problem lies likely in the top cooler of the tower; it’s not easy to add salt to the stabilizer. It is recommended to look for the problem in the cooler