Urgent request: Is it appropriate to use the Topsoe WSA process for treating alkylated waste acid?
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This post was last edited by Oath-taking on 2011-9-14 20:20. Our company is planning to install an alkylation unit using the sulfuric acid method, which will generate large amounts of waste sulfuric acid. We are currently evaluating various processes for the regeneration of this waste acid. I would like to ask those with more experience: is it appropriate to use the Topsoe WSA process for treating the alkylation waste acid? In my opinion, using the WSA process to treat sulfur or hydrogen sulfide gases should offer significant advantages, but I’m not sure about its effectiveness for treating alkylated waste acids ； Concerned about the high level of impurities in the raw materials, the WSA process relies on just one dust collector; if the dust removal efficiency is poor, it will cause problems for the catalyst. Those who have more knowledge about the WSA process, please help answer this question. Thank you:handshake
This post was last edited by Luoshi on 2011-9-8 at 11:02. WSA is capable of handling alkylated waste acids, hydrogen sulfide, sulfur, sulfur dioxide, and even ammonium sulfate, but it is primarily used in coking and smelting industries in China. Topso has built WSA units capable of treating alkylated waste acid in Russia, Bulgaria, Canada, and Taiwan; for specific recommendations, you should consult Topso directly.
Reply to 1# freemanczz: If the impurities in the alkylated waste acid are mainly substances that can be burned to produce gases, then using WSA poses no major problems. If solid residues are formed after combustion, strict dry dust removal measures should be considered. The dust thus removed is easy to utilize, and no wastewater is generated (wet purification produces large amounts of wastewater); moreover, the heat efficiency is high since the gas enters the WSA unit at high temperature.
The WSA process is fully viable for the treatment of alkylated waste acid. Firstly, the installation of an efficient electrostatic dust collector and a special waste pot structure prevents dust in the system from entering the reactor. Even if a small amount of dust enters the reactor, the presence of two dust collection beds in the design prevents blockage issues. The only regret is that there is currently no operational WSA waste acid treatment system in the country. However, as the operating rate of alkylation units increases, more units using the WSA process for treating alkylation waste acid will be installed.
Thank you to those up above for participating. Some time ago, we also had preliminary technical discussions with Topso. At present, there are no precedents in China for using the WSA process to treat alkylated waste acid; I heard that Dalian Xitai is using this process for such treatment, but it has not yet been put into operation. We are quite concerned about the effectiveness of electrostatic dust collectors. We wonder if anyone has used them and how effective they are
Reply to 1# freemanczz: Hello, may I ask which refinery you work for? Does your refinery plan to install an alkylation unit?
That’s a good explanation. Are you involved in research on this type of processing?
A dry purification process was once tried in China, but it was abandoned due to the inability to handle volatile impurities.
Currently, the acid production units that utilize alkylated waste acid pyrolysis in China adopt a dry acid production process.
The last edit to this post was made by in the blink of an eye on 2013-10-20 at 09:58. The effectiveness of electrostatic precipitators in removing gaseous impurities is obvious; if possible, it could revolutionize existing wet purification processes. Looking forward to it
The first set of Topsoo WSA units in the field of regeneration of alkylated waste acid was put into operation in 1999, and it has been functioning well to this day; the high-temperature electrostatic precipitator ensures the continuous and long-term operation of the system. In addition, Dalian Xitai’s WSA alkylation waste acid unit was also put into operation in 2013, and it has been performing very well.