Many industries in the sewage treatment, will be related to sludge dewatering. In the sludge dewatering, the most used flocculant is cationic polyacrylamide. For everyone details: sludge dewatering the use of cationic polyacrylamide effect is good.
First, the cationic polyacrylamide overview
Cationic polyacrylamide is a white powder particles, has a strong flocculation effect, it is widely used in water treatment and metallurgy, paper, oil, chemicals, textiles, mineral processing and other fields. Cationic polymer flocculant is a water-soluble linear polymer compounds, molecular weight between 600-1800 million, in methanol, ethanol can be dissolved, insoluble in ketones, esters, hydrocarbons and other organic solvents. In acidic or alkaline medium were positive for electricity, so that the effective suspension of suspended solids in the sewage of sewage with flocculation and sedimentation.
Second, the need for sludge dewatering industry which?
There are many industries involved in sludge dewatering, including: paper mills, printing and dyeing plants, washing cloth factories, petrochemical plants, organic chemical plants, meat factory, brewery, steel desulphurization and dust removal sludge, , Aluminum plant red mud, ceramic factory sludge, color tube plant sludge, lime and sediment sludge, coal preparation plant tail mud, glass factory quartz slag and so on.
Third, the sludge dewatering the use of cationic polyacrylamide effect is good
Cationic polyacrylamide used in the sludge dewatering effect is very good, but it should be noted that: the use of cationic polyacrylamide in the process of sludge dewatering, we must pay attention to the correct use of the method. The following is a small section of Zhengzhou Tianhe for everyone to summarize the points: cationic polyacrylamide used in the sludge dewatering precautions, as follows:
1, the size of the floc: floc too small will affect the speed of drainage, floc too will make the flock more water and reduce the mud cake dryness. The size of the floc can be adjusted by selecting the molecular weight of the cationic polyacrylamide.
2, sludge characteristics. The first point to understand the source of sludge, characteristics and composition, the proportion. According to the nature of the different sludge can be divided into two kinds of organic and inorganic sludge. Cationic polyacrylamide for the disposal of organic sludge, the relative anionic polyacrylamide flocculant for inorganic sludge, alkaline strong cationic polyacrylamide, and acidity is not strong with anionic polyacrylamide, solid content When the sludge is usually high, the amount of polyacrylamide is also large.
3, floc strength: floc in the role of shear should be stable and not broken. Increasing the molecular weight of cationic polyacrylamide or selecting the appropriate molecular structure contributes to the improvement of floc stability.
4, cationic polyacrylamide ion degree: for the dewatered sludge, can be used to different degrees of flocculant by doing a small test to stop the selection, select the best suitable cationic polyacrylamide, so that can get the best flocculant Effect, but also make the least amount of drugs, saving costs.
5, cationic polyacrylamide dissolved: dissolved in order to fully play the role of flocculation.