Why is a 50-mm opening made in the tower of the flue gas desulfurization tower in the light hydrocarbon recovery unit, along with a reducer, to discharge the light contaminated oil from the bottom of the tower?

The original equipment might have been designed to be on the larger side, but this does not affect the manufacturing process.

It’s a pretty large courtyard. . It doesn’t seem right that such a mistake should happen

It is difficult to paint pipe openings of 2\" or less on the equipment.

Is that claim still around? We often use 25 and 40

This post was last edited by ylb913 on 2016-1-14 at 14:42. 1. The equipment was ordered quite early, and under normal circumstances, the detailed construction drawings have not yet been prepared at that time. It’s better to have too much rather than too little. 2. Deliberately enlarging the equipment openings is quite common in our factory, usually to leave room for future capacity expansion. 3. Based on actual operation experience, the small nozzles have a thin wall thickness, making them prone to corrosion (mainly under the insulation layer). Over the past few years, we have replaced many such small nozzles in the desulfurization towers, and leaks were always detected during steam pressure testing after maintenance work began; fortunately, no leaks occurred before the maintenance work was completed. ——Of course, in recent years, there have been more cases where nozzles with large-thickness protrusions are used.

How is the oil skimming port of your flue gas desulfurization tower designed? Is it also changed from 50 to 25? Also, aren’t the interfaces for local and remote pressure gauges usually 25? Have these pressure gauge connections been repaired at any point?

So, if painting is done internally, is it easy?

I haven’t come into contact with this before. . Are all of you in the tower at level 50 or above?

I’m not sure what kind of exhaust gas the so-called “exhaust gas desulfurization tower” is designed to treat. The outlet of our three atmospheric and vacuum compressors leads to the catalytic unit; it should instead go to the inlet of the catalytic pressure gauge, where the pressure is relatively low. In short, there is no separate exhaust gas desulfurization tower; it is possible to increase the pressure and feed it into a certain desulfurization tower. The gas, including that from the gas holder, can also be fed into our desulfurization tower or that in the catalytic workshop, depending on which tower has sufficient capacity. Our desulfurization towers do not have oil skimming ports; instead, there is an oil separation tank before desulfurization. The rich liquid flash tank does have oil skimming lines, but they have not been used in over twenty years. Additionally, oil accumulates in the acidic water reflux tank at the top of the regeneration tower; we deal with this by draining and evacuating the tank. Even in that case, over these twenty years, it has only been done a few times – I can’t remember exactly how many, but it’s probably no more than five times. Also, aren’t the interfaces for local and remote pressure gauges usually 25? Have these pressure gauge connections been repaired at any point?

Can you remove oil from your rich amine solution so thoroughly? . Also, what is the approximate frequency at which oil is skimming from the reflux tank of your acidic water stripping tower?