Polyacrylamide and polymeric aluminium chloride can be used at the same time? - CHINAFLOC
Home > News > 


Polyacrylamide and polymeric aluminium chloride can be used at the same time?
2016-01-13 09:23:42

Anionic polyacrylamide (APAM) product appearance: a white granular solids: 88% or higher molecular weight: 600-30 million charge density: 10 to 40 anionic polyacrylamide (Mole %) is water-soluble polymer, is mainly used for all kinds of industrial waste water flocculation sedimentation, precipitation clarification process..

In sewage at ordinary times, some of the sewage, use a single a flocculant is short of effect, must be used two kinds of combination, in the use of inorganic flocculant PAC and PAM composite flocculant sewage can achieve better effect, but reagent addition to pay attention to order, order is not correct, is also to reach the effect.
Polyacrylamide and other flocculant mixed using the order of adding method:
When using composite flocculant must pay attention to add the order and the dosing interval!Combined use of PAC and PAM is to make the PAC/finish and charge colloid stability after small flocs formed, further increase the floc size is beneficial to fully precipitation.Because of polyaluminium chloride PAC reaction time is short, so after joining need strong mixing, PAM role, mixed note first strong weak - after the first strong to weak after mixing is to avoid destroying the floc.Polyacrylamide flocculant, polyaluminium chloride coagulant, under normal circumstances is to add coagulant and polyacrylamide, but to be on the safe side, or recommend effect through the experiment to determine the add order!Dosing point, dosage, dosing and the mixing intensity need to experiment to determine time, remember don't put them together to use two kinds of powders, otherwise it will effect, increase the cost.
Cationic polyacrylamide use notice:
1, the size of the floccules: floccules is too small will affect the rate of drainage, floccules is lower the floccules constraints, more water and mud biscuits.After choosing the molecular weight of polyacrylamide can adjust the size of the floccules.
2, the sludge characteristics.The first point to understand the sources of the sludge, the characteristics and composition and proportion.According to the properties of the different, the sludge can be divided into two kinds of organic and inorganic sludge.Cationic polyacrylamide used for disposal of organic sludge, relative anionic polyacrylamide flocculant used in sludge, inorganic alkali is very strong in the cationic polyacrylamide, and should not be used when strong acid anionic polyacrylamide, high solid content in sludge usually polyacrylamide dosage is large.
3, the intensity of floccules: floccules under shearing action should be stable and not broken.Progress of polyacrylamide molecular weight or choose the suitable molecular structure helps to progress floccules stability.
Ion degrees: 4, polyacrylamide for dewatering sludge, different ion flocculant are available after do small stop first selected, select the best suitable polyacrylamide, which can achieve the best effect of flocculant, and can make the dosage, at least, to save money.
5, polyacrylamide dissolved: dissolve good talents full play a role of flocculation.Sometimes needs to speed up the dissolution rate, when the concentration of a solution of polyacrylamide can think progress.