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English Translations » 历史存档[信息] » Coking: What is the difference between adding antifoam agent

Coking: What is the difference between adding antifoam agents before the four-way valve and adding them at the top of the coke tower?

2015-06-20View Original

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This post was last edited by wt2008 on 2015-6-21 at 19:16. What is the difference between adding antifoam agents before the four-way valve in coking and adding them at the top of the coke tower?
Reply #22015-06-23
Add antifoam agent before the four-way valve: it suppresses foam formation, but the effect is not significant. Antifoam agent injected at the top of the coke tower: reaches the surface of the bubbles directly, with very good results.
Reply #32015-06-23
Defoamers can help to reduce the height of the foam layer in the coke tower during normal production, and the effect of injecting them at different locations varies; injecting them from the top of the coke tower yields better results than injecting them from the bottom. Adding a defoamer can help reduce the content of solid solutes in coking products. Using an antifoaming agent at the top of the coke tower yields much better results than using it before the four-way valve.
Reply #42015-06-24
It seems that the defoamer wasn’t added before the four-way valve; it was all added at the top of the coke tower. Top injection is in direct contact with the foam layer. Foam dissolves quickly.
Reply #52015-06-26
Top injection is in direct contact with the foam layer. Foam dissolves quickly.
Reply #62015-07-07
We have never used the defoamer at the four-way valve in our company; it has now been removed and is no longer in use
Reply #72015-07-13
I’ve heard of adding antifoam agent in front of the four-way valve for the first time; I’ve never seen it done before. Is the antifoam agent used the same as the one used at the top? If they are the same, the effect of direct connection from the top to the surface should still be better
Reply #82015-07-13
A large amount of antiscaling agent is injected in front of the four-way valve; since the amount of defoaming agent required is high, this method is generally not used； It is generally routed to the oil and gas outlet at the top of the tower.
Reply #92015-07-22
Since no one needs it, then why is injection at the bottom of the tower included in the design?

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Translated at 2026-07-21 02:11:28

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