As we all know, the common method of coagulation test mixer is coagulation beaker experiment. The most common place is used for water supply and drainage plants and pharmaceutical manufacturers, because it plays a certain role in guiding production, it can be the improvement of water plant process or water. The daily production of the plant provides reference data, and it can also predict the quality of the filtered water and conduct research on coagulant and coagulant. However, due to the large difference between the beaker stirring test and the production process, the water flow state is far from the actual production, so Different agitation levels will affect the overall experimental results. To this end, Xiaobian today analyzes the different effects of the fast and slow agitation of the stirrer in the coagulation experiment:
In fact, we know from the current domestic coagulation test mixer brand and configuration that the speed range of the coagulation test mixer is generally designed to be 10~1000 rev / min, which means that our general coagulation process is mainly It can be divided into two phases, one is the mixing phase and the other is the reaction phase. The mixing stage is a mixed dispersion center formed after the addition of the agent, so the mixing stage must allow the agent to diffuse rapidly and uniformly into all the water to create good hydrolysis and polymerization conditions. Therefore, the mixing stage must require rapid and vigorous stirring of the agitator. It should be completed in the shortest time; the reaction stage is to observe the precipitation process after the whole mixing. Therefore, the flocculant particles are required to form large floccules with good sedimentation properties by flocculation. Therefore, the reaction stage must be required. The mixing strength or water flow speed of the agitator gradually decreases with the formation of the floc. Due to the adsorption bridge between the coagulants, the adsorption neutralization, and the compression of the electric double layer, if the agitation is too intense, This effect between the damage, the coagulation effect is reduced, so this time can not be too intense agitation, so as not to break the large flocs, is not conducive to the formation of silk flowers. Secondly, the effect of slow stirring time on the coagulation test can not be ignored. The slow stirring time is too short, the scorpion flower does not effectively collide, and the floc growth is not large. The slow stirring time is too long, and the formed large sassafras will be broken by the stirring paddle, which is not conducive to the late precipitation.
Summary: In summary, the different agitation degree of the mixer in the coagulation test will directly affect the whole experimental effect, and the speed of the mixer is too fast and too slow, and the mixing intensity and time should be controlled in combination with the experimental environment, followed by The influence of the square cup and the round cup on the test G value is also slightly different. According to the user reaction, the cup coagulation test result is actually closer to the actual production.
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