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Polyacrylamide / The anionic polyacrylamide (Aquafloc AN950) can be replaced by a CHINAFLOC A2818
The anionic polyacrylamide (Aquafloc AN950) can be replaced by a CHINAFLOC A2818
Aquafloc AN950 is a kind of anionic polyacrylamide with high molecular weight and medium hydrolysis degree from SNF company.mainly used in water treatment and mineral processing .Chinafloc A2818 can repalce of it totally and with good performance.
1400-18 million molecular weight polyacrylamide product price reference:
1, 1400-18 million molecular weight anionic polyacrylamide product price is about 10000 yuan/ton, anionic polyacrylamide molecular weight higher product price is higher, high molecular weight polyacrylamide dosage is small in a certain extent also saves the cost of sewage sludge treatment. Can also determine the need to use more high molecular weight anionic polyacrylamide, according to different sewage sludge properties selected anionic polyacrylamide dosage, control the dosage of good agents, in order to more reasonable control of sludge sewage treatment costs.
2, do not just compare the price, choose the right type of products, the dosage of pharmaceutical control in a reasonable range, save the dosage of drugs, and at the same time can achieve the ideal sewage sludge treatment effect is the goal.
Anionic polyacrylamide dissolution and use method:
Anionic polyacrylamide is white solid powder, belong to the organic polymer flocculant, high viscosity, in sewage and sludge treatment process in use, the need to dissolve the solid powder polyacrylamide with a certain concentration of liquid, using PAM aqueous solution for wastewater treatment, sludge filter dewatering, anionic polyacrylamide dissolved method and using method is as follows:
1, anionic polyacrylamide dissolution: to use clean tap water dissolution, can not use sewage, the normal temperature of water dissolution, water temperature is less than 5℃, the dissolution rate is slow, you can increase the dissolution rate by heating, but not more than 40℃, water temperature is too high will lead to polymer degradation, affect the use effect.
2, polyacrylamide concentration configuration: one thousand to three thousand, 1 liter of water add 1-3 grams of solid polyacrylamide. In the configuration process, the concentration of liquid agent can be lower, which is more conducive to the mixing of polyacrylamide flocculant solution and sewage, forming a more dense and larger alum flower, producing good flocculation effect and improving the efficiency of sewage treatment.
3, polyacrylamide concentration configuration reference factors: if the configuration of solubility tank is small, large capacity, it is recommended to configure 0.3% concentration of liquid; If the selection of polyacrylamide molecular weight is high, can be configured with 0.1% concentration of liquid; Polyacrylamide solution is added to the sewage, if because of equipment reasons, the dispersion is not in place to better mix with sewage, the solution concentration can be lower to ensure that the load of the stirring equipment is moderate when dissolving, and the flocculant is better mixed with sewage. Do not use centrifugal pumps to transfer the finished solution to avoid shear degradation of the polymer caused by high-speed rotating blades.
4, solid polyacrylamide solution configuration method: add quantitative water in the solution tank, according to the water and concentration of solid polyacrylamide calculation required by weight, weighing agents. Turn on the electric stirrer and stir the water out of the whirlpool. The linear speed at the end of the stirrer blade should not exceed 8 m/s to avoid polymer degradation. The stirring speed should not be too slow, so that the polymer particles do not float on the surface of the water, or sink in the water, clumping. Add solid polyacrylamide to the vortex in the water, pay attention to powder polyacrylamide particles into the water after dissolution can not adhere to each other, agglomeration. Stir the polyacrylamide thoroughly to dissolve it into a uniform, transparent and viscous solution without visible snowflake lumps.
5. Mixing time is determined according to the following method:
(1) in summer when the water temperature is high, negative and cationic polyacrylamide need to stir 45-60 minutes, non-ionic polyacrylamide need to stir 60-90 minutes;
(2) in winter when the water temperature is low, negative and cationic polyacrylamide need to stir for about 60 minutes, non-ionic polyacrylamide need to stir for about 3h.
6, the selection of drug dissolution device: tank to avoid the use of iron containers, iron ions are caused by all the polyacrylamide chemical degradation catalyst, in the preparation, transfer, storage of polyacrylamide solution, to avoid iron ions into. The equipment in contact with the solution is made of stainless steel, plastic, fiberglass or carbon steel coated with resin.
7, anionic polyacrylamide adding use: polyacrylamide dissolved into an aqueous solution through the dosing device into the flocculation tank, so that the agent solution and sewage fully mixed, the formation of flocculation reaction. General polyacrylamide and PAC polyaluminum chloride, PFS polyferric sulfate, PAFC polyaluminum chloride, aluminum sulfate and other inorganic coagulants with the use. Take polyaluminum chloride as an example of inorganic coagulant added in the coagulation tank, through hydraulic automatic mixing of suspended solids and PAC polyaluminum chloride to generate charge neutralization, loss of stability, the formation of small alum flower, after the treatment of the sewage after the coagulation tank into the flocculation tank after adding PAM polyacrylamide, further help coagulation. It helps the small flocs that have formed alum flowers to form larger flocs, which are separated from water under the action of gravity and form precipitation. The water flow after flocculation enters the sedimentation tank for further mud water separation and sludge concentration treatment.
8, negative and cationic polyacrylamide solid and liquid agents can not be mixed together, mixing can not be used to achieve sewage sludge treatment effect.
Anionic polyacrylamide packaging and storage:
Anionic polyacrylamide packing 25kg/bag, plastic moisture-proof film, kraft paper coated bag, can avoid polyacrylamide moisture.
Storage polyacrylamide solid dry powder products do not expose for a long time, will lead to damp agglomerate, should be stored in a cool and ventilated dry place.