How to clean a sulfuric acid heat exchanger
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This post was last edited by sunjl1981 on 2013-1-6 at 23:50. Our factory uses many sulfuric acid heat exchangers; after operating for a while, the flow rate through these heat exchangers decreases due to an excessive amount of acid sludge inside them. How can this sludge be removed effectively? What cleaning agents should be used without causing corrosion to the heat exchangers? Thank you!!! # hcbbs
5% HCl, EDTA, urethane, H2O.
Take apart the plates and rinse them with water; our factory has done this several times. This post was last edited by limingshuguang on 2007-12-10 13:16.]
Just loosen the bolts, rinse with water, and dry with a cloth; be sure to take protective measures
We took it apart to clean it, and we washed it many times as well. I’m not sure what type of heat exchanger your facility uses; be careful when cleaning it, as the heat exchange fins can be very harmful to your hands.
This post was last edited by 181128425 on 2009-7-13 at 16:52. Mechanical cleaning as well as chemical cleaning methods are both acceptable; the most important thing is that the cleaning solution should not react with the material of the heat exchanger
Just rinse it with water directly!
It was taken apart and washed with water, but no water should remain in any hidden areas.
There’s no need to say anything about the water side; for the acid side, it can first be blown out with compressed air and then washed thoroughly with water
Should it be a plate heat exchanger or a spiral plate heat exchanger? For plate exchangers, simply disassemble them and clean them; spiral plates can be cleaned using some cleaning solution, following the method suggested by the friend on the third floor.
As a supplementary point, chemical cleaning is not very effective for plate heat exchangers; it’s better to disassemble them and clean them manually
:Lol, what everyone is saying makes quite a bit of sense
I agree with what everyone said, but we need to control the source. Under normal circumstances, there should be very little acidic sludge.
Water can be used, and there are also specialized chemical cleaners. The key is to be patient during the cleaning process and to take proper protective measures
1. Water flushing is the best method, but be careful: when using water for flushing, there should be no one on the opposite side, and try not to direct the water at people, as that can be dangerous. 2. After passing through the heat exchanger, the water should even less be directed at people; you can ask them to move away. If he doesn’t obey, just hit him; it’s for his own good anyway. 3. The pressure of the water can be set below 10 MPa – it shouldn’t be too high. I don’t know the thickness of your pipe walls; if that value is exceeded, it’s your problem. 4. Some people might say that adding sodium hydroxide would be better, but that’s not true; especially now, don’t add it. Wait until the water has been cleaned thoroughly, and then add something suitable. That’s all; be careful not to damage the heat exchange tubes
Recently, the company plans to launch a project for concentrating dilute sulfuric acid. I saw that the original poster mentioned there are many sulfuric acid heat exchangers in use there, and I was wondering what material the heat exchangers are made of
For the concentration of sulfuric acid, graphite heat exchangers can be used; the key is to determine to what extent the dilute sulfuric acid should be concentrated
Just wash it with water. Look at the type of heat exchanger, but the cause of the acid sludge should be identified. Eliminate it at the source.
Sulfuric acid heat exchangers are usually plate heat exchangers; one can remove the tie rods, take them apart, and wash them directly with water, cleaning any hard-to-reach areas with a cloth