Desorption tower dehydration
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Is there dehydration in the middle of the desorption tower? How is it working? This post was last edited by Shuichangshou on 2009-3-28 21:31.]
Is it necessary to add a middle dehydration section to the distillation tower? I’ve never seen that. Once the water is removed from the condensate tank, everything is fine.
What’s the point of dehydrating in the middle section? It can’t be operated.
Why is dehydration carried out in the middle section of the distillation tower? There’s also a dedicated compressor outlet liquid separation tank! The rectification tower is over 100 degrees, so dehydration isn’t necessary, right?
How can there be water in the desorption tower? Doesn’t the oil-gas separator at the outlet of the pressure compressor in the original poster’s setup have a dehydration pack?
Each tower contains trace amounts of water~~~~ I’ve never seen dehumidification equipment installed specifically in the middle of a desorption tower~~~ One can check whether there is water by examining the vent from the cooling unit in the absorption section~~~
Your idea is quite unique, but I’ve never seen a parsing tower like this; I don’t think it’s necessary. . .
With this design, a dehydration line is installed in the middle of the absorption tower at Qingdao Refining Plant; it transports the dehydrated fluid to the oil-gas separator at the exit of the compressor, and this line is also connected to a sampler.
I’ve never come across such a parsing tower; the original poster could give some introduction.
We have it here too; it goes to the condensate tank. I would like to ask how the water in liquid hydrocarbon tanks is handled? If there is a lot of water in the liquid hydrocarbon tank, it must have come in from earlier – how should this be dealt with?
I haven’t been involved in dehydration at the middle of a distillation column, but I have seen dehydration in the overhead recycle stream; I’m not sure if it’s the same. Install a fully drained oil collection tank, along with a float and a double-flange level gauge.
Your idea is good. Under normal circumstances, a separation tower does not require dehydration, nor does it have any dehydration equipment. When water removal is inadequate in the front section, it becomes quite difficult to remove water once it reaches the back section. It would be great if there were dehydration facilities available!
Haven’t seen it before; let’s expand our knowledge together
We have one in which oil is drawn from the oil collection tank in the middle of the desorption tower, pumped to specialized dewatering equipment, and then returned to the tower after heat exchange with steam.
As for the water from the liquid hydrocarbon tank (which is likely the reflux tank at the top of the stabilizer), it is discharged intermittently; therefore, during normal operation, there is very little of it. This water can be combined with the water that comes out under its own pressure from the oil-gas separator at the compressor outlet, and then sent to the acid water stripping feedwater tank. If there is an acidic water buffer tank inside the device, it can also be sent there under its own pressure and pumped out of the device. All are equipped with on-site discharge facilities, but due to environmental regulations, discharge outside is strictly prohibited unless under special circumstances.
It’s very simple: based on the design and operating conditions, determine the area in the tower where water accumulates, and then connect a pipeline directly to the oil-gas separator at the compressor outlet. The purpose of installing a sampler is to monitor whether there is water present or not.
We don’t have dehydration in the middle section of the analysis tower here
Furthermore, poor dehydration in the condensate oil tank can cause water to enter the desorption tower. What should be done if the dehydration in the condensate oil tank is inadequate? Here, the liquid level is above 50%, while the interface level is only at 30%
The liquid from the upper part of our desorption tower (between the first and second trays) is drawn off to a dehydration tank, where it flows under its own pressure to the reflux tank at the top of the tower; however, liquid levels there are rarely observed.
Our factory has such a structure, but it’s not effective; there is an oil collection tank in the middle, along with a level gauge for dehydration, and below the oil collection tank there is a small water reservoir