Why are no solvent dephenolization units being installed in coking plants these days
Thread Content
I’m not sure which coking plant currently uses solvent dephenolization to treat residual ammonia water and wastewater from further processing. I’ve reviewed the design plans for many projects, but none of them include solvent dephenolization units. Does that mean wastewater containing phenols doesn’t need to be treated? Please share your thoughts
Phenol-containing wastewater is treated. It’s just about treating phenols using biochemical methods or other approaches to bring them up to the emission standards. I really haven’t heard of the recycling of phenol and ammonia water. It’s great if it can be recycled, especially since the costs associated with producing synthetic ammonia each year are substantial. The excess ammonia water from coking plants is either burned away uselessly or requires significant investment in treatment processes, representing a double waste.
In China, pulse sieve tray towers are mostly used in solvent dephenolization units, with a frequency of 300 and an amplitude of 3–4; these units require considerable maintenance； The equipment is severely corroded; whether ammonia is vaporized first followed by phenol removal, or phenol removal first followed by ammonia vaporization, the issue of equipment corrosion remains the most difficult to address. One set of the solvent phenol removal units at the Shanghai Coking Plant has already been damaged due to corrosion, and our units have only been in operation for a little over a year yet already show multiple leakage points ； Dephlogistication extractants have limited selectivity, are extremely expensive, and require large amounts to be replenished during operation; moreover, the old crude or heavy benzene methods are difficult to use in biochemical applications.
:Hehe, it’s not you I’m talking about. There was someone on the 2nd floor who kept posting advertisements; they were all the same content. As soon as the thread was created, I saw two of his ads, and I deducted points from his account. To my surprise, when I opened this thread again, I saw his ads there. Thankfully, that thread has been deleted; it was just a misunderstanding: handshake
Our factory uses crude benzene as a solvent; the product we produce works quite well, haha. Then it is sent for biological phenol removal