Product Series
Paper Mill Special Polyacrylamide
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Keywords: billion groups of environmental protection
Category: Products
Product Details
Product Description:
Papermaking special polyacrylamide is widely used as a resident agent, filter aid, uniformity agent, water treatment agent, etc. in the field of papermaking. Its function is to improve the quality of paper, improve the dewatering performance of pulp, improve the retention rate of fine fibers and fillers, reduce the consumption of raw materials and environmental pollution. The effectiveness of use in papermaking depends on the average molecular weight, ionic nature, ionic strength, and reactivity of the other copolymers. Non-ionic PAM is mainly used to improve the filterability of pulp, increase the strength of dry paper, and improve the retention rate of fiber and filler; anionic copolymer is mainly used as dry and wet reinforcing agent and retention agent of paper; cationic copolymer is mainly used for papermaking wastewater treatment and filtration aid, and it also has a good effect on improving the retention rate of filler. In addition, polyacrylamide PAM is also used in papermaking wastewater treatment and fiber recycling.
Technical indicators:
| Project Model | Appearance | Molecular weight (ten thousand) | Solid content (%) | Degree of ionicity/degree of hydrolysis (%) | Residual monomer (%) | Scope of use |
| anionic type | white granular powder | 300~2200 | ≥ 90 | degree of hydrolysis 10-45 |
≤ 0.2 | PH value of water is neutral or alkaline |
| cationic type | White particles | 500~1200 | ≥ 90 | ion degree 10-80 |
≤ 0.2 | belt machine /Centrifugal /Filter press |
| non-ionic type | White particles | 200~1500 | ≥ 90 | degree of hydrolysis 0-5 |
≤ 0.2 | PH value of water is neutral or alkaline |
Specific use:
The main characteristics of sewage produced by paper mills are large water volume, high chroma, large suspended solids content and high organic matter concentration. Generally, the main problem to be solved in the treatment of this wastewater is to remove SS and COD. At present, the more popular methods for treating paper mill wastewater include air flotation, precipitation, combination of physicochemical and biochemical treatment, etc. If air flotation or precipitation is adopted, coagulant (polyaluminum chloride) and coagulant aid are added, in this way, most of SS can be removed, and most of non soluble COD and part of soluble COD and BOD5. Special polyacrylamide for paper mills generally uses anionic polyacrylamide with molecular weight above 15 million to achieve ideal effect (it is better to do test and selection to see what kind of hydrolysis polyacrylamide PAM products your sewage water quality is suitable for). If the combination of physicochemical and biochemical treatment is adopted, the process of general physicochemical and biochemical treatment methods is wastewater → screen → adjustment → precipitation or air floatation → A/O or contact oxidation → secondary sedimentation tank → discharge. Cationic polyacrylamide is generally used in this treatment process scheme.
Note:
1. Dissolution temperature. Dissolution requires a certain temperature to speed up the dissolution. However, if the temperature is too high, the molecular chain of the polymer will be broken and the use effect will be reduced. The more suitable dissolution temperature is 50-60 ℃.
2. Stirring conditions. Dissolution should avoid too strong shear stirring, too strong stirring will break the molecular chain, thereby reducing the use effect. Mixing should adopt low-speed blade, such as anchor type, frame type, multi-layer slurry type, etc. The stirring speed is about 60 r/min. Transport should also avoid the use of high-speed centrifugal pump, more suitable for the use of piston pump or diaphragm pump.
3. Uniform dispersion feeding. The key to the dissolution of polyacrylamide PAM is the uniform dispersion of the feed. After the mixer is started, it is best to use mechanical vibration screen feeding (screen mesh number is 10 mesh), try to avoid the production of "large mass", "fish eye" insoluble particles, so that polyacrylamide can be fully dissolved, play a good use effect.
4, avoid and iron solution. In the dissolving, stirring and conveying dosing system, it is best to use plastic, enamel, aluminum, stainless steel and other materials.
5. Product selection. When seeking to purchase polyacrylamide PAM products, it is required to provide sewage/sludge for polyacrylamide product selection test as much as possible. Due to the different raw materials and sewage treatment processes used in the papermaking process of various paper mills, the water quality still varies greatly. It is still firmly believed that the selected flocculant products can help enterprises save a lot of pharmaceutical costs and solve the problem of manufacturers' drainage standards as much as possible.
Packaging and storage:
25 kg/bag (plastic kraft paper bag lined with plastic bag).
This product is non-toxic, pay attention to moisture, rain, avoid sun exposure.
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