The desulfurization effect of liquefied petroleum gas is not good. Do you have any good ideas?
Thread Content
At present, the liquefied gas desulfurization effect of the catalytic device is not good. When it is good, the hydrogen sulfide is 30ppm, and when it is large, it is 100~200ppm. We have used the usual methods, but the effect is still not good.
Do a dry desulfurization, add some iron oxide and it will be clean.
1. Increase the reflux flow of ethanolamine at the top of the desulfurization tower appropriately. 2. Increase the pressure of the desulfurization tower, or appropriately reduce the pressure of the regeneration tower. 3. Lower the temperature of the desulfurization tower, or increase the temperature of the regeneration tower. 4. After accurately analyzing the concentration of ethanolamine, add a certain amount of fresh agent to increase the concentration to no less than 25%. If this is not possible, consider replacing the ethanolamine part of the system.； 5. If the above measures have been debugged and still fail to achieve the expected results, it means that there are certain problems with the equipment of the desulfurization system. Our desulfurization tower used to be trays, but later changed to structured packing. The effect is good, and all quality indicators can meet the standards. ； 6. I wonder if you have a liquefied gas alkali washing device and a demercaptan system. If it cannot be removed through the desulfurization tower, it is recommended to use liquefied gas alkali washing and then water washing.
In fact, the removal of hydrogen sulfide from our liquefied gas has not been very clean, but there is still mercaptan removal at the back. Even if the removal is not very clean, it doesn't matter, but the alkali consumption is high.
4# lyybjgz After your desulfurization, there is also demercaptan. Can you explain in detail the process and operating procedures? Thanks
For liquefied gas desulfurization, MDEA is used to desulfurize hydrogen, and then alkali is used to desulfurize it! 1. After MDEA has just been replaced, the effect will definitely be good. After a period of use, heat-stable salts will appear and MDEA cannot be completely regenerated. You can consider an amine liquid purification device, MPR from the United States and ampure from Canada, but they are a bit expensive and uneconomical. If the device has a large processing capacity and a large amount of MDEA is used, you can consider it. 2. Maybe the liquefied gas recovery rate has increased, and the demercaptan part has a large load, so the effect is not good. You can increase the flow of alkali. If the copper sheet corrosion can pass, you can consider it.
If it is not an operational problem, add a fine desulfurization tank
Using a liquefied gas fiber membrane alkali cleaning device, the sulfur content can reach 20mg/m3
How did the poster's equipment be modified? Is the processing capacity improved compared to the design?
Is the raw material high in sulfur? Try fiber membrane desulfurization, the effect is good, we use it all the time.
Detect the amount of thermally stable salts and filter the amine solution