How to effectively and quickly remove impurities from the filter of the semi-lean solvent pump? (Q&A with prizes)
Thread Content
During operation yesterday, it was found that the semi-poor liquid pump was in a semi-evacuated state; it is suspected that the filter at the pump’s inlet was clogged, so the backup pump was switched in. When reprocessing the filter, it was found that a relatively thick layer of sticky substance was adhered to the filter mesh; it had a graphite-like texture, was very hard, and extremely difficult to clean. Relatively speaking, the filter was also cleaned during the previous stage for the concentrated waste liquid; there, it was rubber powder. Although it was thick, it was in a relatively soft state, and it could be used after simply rinsing it with water! 1. I’d like to ask everyone, are there any good ways to clean it up quickly? 2. Why, for the same tower and different materials, when the output temperatures differ by no more than 10°C, does the glue exhibit such significant differences in its state?
I’ll add more pictures when I have time, and based on everyone’s responses, I’ll give positive ratings;P
We noticed this issue when we started operating as well, but we don’t have any semi-solid liquid. The condition at the pump inlet is also as you described; it’s very likely that activated carbon powder has reached the pump inlet. As for the gel-like substance you mentioned, I suspect it might be formed by an excessive amount of defoamer reacting with the amine solution
Let me share the solutions we used here along with some of my personal analyses: 1. Solution: In the end, we used a high-pressure water gun for cleaning, and the result was excellent – everything returned to its original condition. :Lol 2. Regarding the reason for the formation of these gel-like substances: Since we use a lean liquid and semi-lean liquid process, the rich liquid enters the upper part of the tower after heat exchange (it is completely separated from the lower part of the tower; there is only one vortex prevention outlet and one reflux outlet). After passing through several layers of trays, it reaches the bottom of the upper part of the tower, where gel-like substances tend to accumulate. The temperature here is also high, and the relatively high temperature during passage through the filter facilitates the accumulation of these gel-like substances, leading to the formation of solid gel blocks over time. Although there is also high temperature at the bottom of the tower, the solvent is cleaner after filtration, so the likelihood of formation **decreases! In the absorption tower, the rich liquid is in an environment with a relatively low temperature, so it does not easily form lumps; it remains in the form of soft sludge.
May I ask how you plan to handle such issues in the future? Can it solve the glue problem?
The filter in the front quench tower ensures regular backwashing, which helps to reduce the amount of cement powder carried forward in the gas stream and thus decreases the frequency at which the filters at the inlet of the pumps in the rear section need to be cleaned.
I’ve encountered users who used steam for cleaning, but the medium was salt. Hurry up after washing.
This rubber powder is insoluble in water or solvents, so it can only be cleaned.