Introduction of the role of PAM as a flocculant

No matter which PAM product is used as a flocculant, its principle of action is basically the same. The function depends on three stages. This is an important reference for the beaker test selection of the product. Introduction, at present, most people in the industry believe that it is the process of adsorption bridge, flocculation and sedimentation, and in more detail, it can be divided into three stages of cohesion, flocculation and sedimentation, whether in the laboratory test or the machine operation. Can fully indicate whether the selected product is suitable, this article will give a detailed introduction to the flocculation agent coagulation, flocculation, sedimentation process.

    1. Condensation stage: When we add liquid medicine (flocculant or polyaluminum chloride), it is the process of injecting the liquid into the coagulation tank and coagulating with the raw water to form fine fine flowers in a very short time. At this time, the water body becomes More turbid, it requires water to produce intense turbulence. In the beaker experiment, it should be stirred quickly (250-300 rpm) for 10-30 seconds, generally no more than 2 minutes. The effect at this time is the best.

    2. Flocculation stage: It is the process of growing and thickening of silk flower. It requires proper turbulence and sufficient residence time (10-15min). Later, it can be observed that a large number of scented flowers gather slowly and form a clear layer. The beaker experiment was first stirred at 150 rpm for about 6 minutes and then stirred at 60 rpm for about 4 minutes until it was in suspension. See how it reacts and adjust it if it doesn't work.

    3. Settlement stage: treatment of domestic sewage and organic wastewater, this product is positively charged in the matching or alkaline medium, so that the sewage with suspended charge in the sewage is flocculated and precipitated. It is a flocculation sedimentation process carried out in the sedimentation tank, which requires slow water flow. In order to improve the efficiency, a inclined tube (plate type) sedimentation tank is generally used (preferably, flocculation is separated by air floatation method), and a large number of coarse scorpion flowers are inclined tubes ( The wall of the plate is blocked and deposited on the bottom of the pool. The upper layer of water is clarified water. The remaining small diameter and small density of the scented flowers slowly descend, and continue to collide with each other, and the residual turbidity remains basically unchanged.