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How to dissolve and add polyacrylamide to use

  • Author:Carria Wang
  • Source:Original
  • Release on:2021-12-30

Polyacrylamide dissolution: The solid powder should be made into an aqueous solution. In order to prevent the powdery agglomeration from appearing fisheyes during the dissolution process, add half of warm water (not more than 60℃) in the dissolution tank, stir evenly, and then slowly add the powder, then add the remaining water and stir until it is completely dissolved . Under normal circumstances, the concentration of the aqueous solution is 0.1-0.3%, dilute it again after use, and the storage time of the solution should not exceed 5 days. Try to prepare it for immediate use. When adding the solution, you should use multi-point continuous dosing to get the effect. fully use.

Add polyacrylamide to dissolve: configure enamel, galvanized, aluminum products or plastic buckets, try to avoid iron containers, this product should be slowly added to the stirrer, avoid large pieces, suitable for room temperature or 60 ℃ water, stir the blade Without edges and corners, the speed is not easy to be too fast, otherwise it will cause the product to degrade and lose its effect

This product is a white or slightly yellow powder with a molecular weight between 400 and 20 million. The solid product is a white or light yellow powder, polyacrylamide type flocculant, high molecular organic compound, and its molecular weight is mostly several million to two thousand. Between ten thousand and some even close to twenty million. So its dissolution method is completely different from inorganic small molecule iron salt and aluminum salt flocculant. Generally speaking, the following principles should be followed:

1. Do not directly add polyacrylamide powder to sewage. It must be dissolved in water before application, and then treated with its aqueous solution.

2. The water used to dissolve the powdered polymer should be clean water (such as tap water), not sewage, and usually does not require heating. Below 5OC, the dissolution rate is very slow. As the temperature rises and the temperature rises, more than 40OC will accelerate the degradation and affect the use effect. Polymer solution is usually suitable for the preparation of tap water, but strong acid, strong alkali, and high salt water are not suitable for preparation.

3. We recommend choosing a polymer solution with a concentration of 0.1%-0.3%, that is, adding 1-3 grams of polymer powder to 1 liter of water. The selection of concentration should consider the following factors:

   Small cans, daily high-dose formula, it is recommended to mix with a heavier amount (such as 0.3%);

   The amount of polymer is very large, and the formulation is relatively dilute (such as 0.1%);

   Due to equipment factors, the polymer solution is thrown into the sewage. If the dispersion effect of the equipment is not good, it is recommended to use a dilute ratio.

   Too high polymer concentration will cause excessive load on the motor, which will cause poor dispersion after entering the sewage and affect the use effect. A slight dilution can improve the effect.

4. Do not use a centrifugal pump to transport the mixed solution, so as to prevent the high-speed rotation of the blades from shearing degradation of the polymer.

5. The specific method of preparation is as follows: add a certain amount of water into a container (such as a laboratory beaker, a factory preparation tank), calculate the required polymer, and calculate the amount of polymer required in the clean water. Weigh out the polymer; turn on the electric mixer and stir the water out of a vortex. The linear speed of the agitator blade should not exceed 8 meters per second, otherwise it will cause polymer degradation; but it should not be too slow to prevent polymer particles from coming out of the water, or Sinking in the water, clumping. Place these polymers in a vortex until they are dispersed. Studies have found that after macromolecular particles enter the water, there is no adhesion between them. Stir for a while to completely dissolve the polymer particles, and finally become a uniform, transparent, viscous solution that is invisible to the naked eye. The method to determine the mixing time is as follows: when the water temperature is high in summer, stir the anionic polymer for about 1 hour, and the non-ionic polymer for about 2 hours; when the water temperature is low in winter, stir the anionic polymer for 1.5 hours and the non-ionic polymer for stirring About 3 hours; as the preparation concentration increases, the dissolution rate of the polymer increases, and the uneven or insufficient solubility will affect the use effect.

Shandong Welldone, as one of the top ten manufacturers of polyacrylamide in China, can provide customers with the required anionic, cationic and non-ionic polyacrylamide. If you are interested in a certain product, don’t be hesitate to contact us.