When the polyaluminum chloride flocculant is used, it is required to fully dissolve the polyaluminum chloride particles before it is good to use. But we often see on the inner wall of the dispensing tank, there will always be a thin residue similar to glue, and this layer of residual glue residue is very sticky and slippery, if it can not be cleaned up in time is very simple to block the drug pump, so every time we need to carry out manual cleaning, which is a waste of time and labor.
It's a lot of work. So how does this happen? What's a useful way to avoid residue?
So let's look at this; Generally speaking, the reason for this phenomenon is that too much polyaluminum chloride is added. In general, try to add polyaluminum chloride more uniform, do not add excessive polyaluminum chloride.
It was found through experiments that the polymer flocculant is a very simple gelatinous substance if the concentration of the flocculant is higher than 5% in the aqueous solution. In general, under normal circumstances, polyaluminum chloride will be used for flocculation and into the flocs, but there are exceptions if the concentration of polymer material is too high, the molecule simply sedimentation, bonding.
If some or all of the polymer does not work, it automatically agglutinates. If added in excess, the remaining polymer material will gradually agglutinate.
In fact, if you look carefully, you will find that if the diluted polymer is not applied right away, but left for a while, you will find that there is a layer of the same stuff at the bottom. We should add a reasonable high dilution of polyaluminum chloride, so as to avoid residue.