What is the foam in the water seal tank of the primary cooler?
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Our factory has only been in operation for 2 months; currently, we have only one top-mounted coke oven with 60 chambers and a length of 5.5 meters. The initial cooling unit is cooled by water in three stages. Since the cooling station has not yet been put into use, the temperature of the water in the lower stage is relatively high, while the temperature of the water in the upper stage is relatively low. The spraying flow rate in the lower stage is 53, and this value is used to adjust the flow rate of the water sent to the upper stage. However, foam often forms in the water seal tank of the upper stage. This problem has occurred several times; the foam only disappears after adding tar to the upper stage. I would like to know what exactly this foam is and how it is formed. Thank you in advance
This problem is very tricky; I guess no one has ever seen it. I don’t really understand it either, but I have some experience that I’d like to share, as a way to stimulate further discussion. I have never seen this situation before, so I can only make an inference ； The wastewater from your area is not collected into the circulating ammonia system; it’s possible that changes in the quality of water within the circulating ammonia have caused the ammonia sprayed in the primary cooler to contain substances that cause foaming. After adding tar, the change in surface tension of the bubbles was eliminated. Here, chemicals are added uniformly to the circulating water to eliminate algae, use microorganisms for that purpose, prevent corrosion, and adjust the pH value. I’ve seen cases where improper use of chemicals caused foaming. But your primary cooler has only been in use for 2 months – it shouldn’t be leaking internally, right? Our primary cooler once had internal leaks, and in the end all of the leaking channels were sealed off.
It is mainly caused by the low oil content in the spray liquid. Oil is the best defoamer. So less tar foam is added.
I agree with what was said above: the large difference in water pressure leads to foaming, which is a normal phenomenon. Tar is used to eliminate foam, and foaming indicates that the tar content is low
It is caused by the low oil content in the spray liquid. Oil is the best defoamer. So less tar foam is added; foaming indicates a low tar content