Polyacrylamide flocculant used in our country for more than 30 years of history, after a lot of work to research, design, universities, and other units to use, and has made a lot of mature experience and effective use of these lines and to prevent errors and affect the results of Precautions. Mark-making in the country, due to different purposes and tasks, it is impossible to discuss and regulations in many aspects. The national standard is mainly directed against the inherent requirements of polyacrylamide products in use, in addition to product-related dissolution time and make provisions, none of any other provision. In order to ensure the proper use of polyacrylamide flocculant to improve their effectiveness, to prevent mistakes, now the problem is not mentioned in the national standard, for a summary of the narrative, so GB play a greater role in the application. Polyacrylamide solution system with the general use of mechanical agitation. Mechanical stirring speed of solution preparation time greater impact, but too much of the stirring speed, can cause degradation of polyacrylamide solution, so that part of polyacrylamide long strand breaks, the impact of the settlement effect, it must be strictly controlled mechanical stirring speed. 1 m in diameter shall not exceed the speed of the mixing bucket 800 rpm, 1.5 ~ 2 m in diameter shall not exceed the speed of agitation poke within 600rpm. Raise the temperature of the solution was stirred to dissolve time can be reduced, but the maximum temperature does not exceed 55 ℃, otherwise it will lead to degradation, affect the results. Preparation of polyacrylamide solution must use special equipment, strictly prevent common with other coagulants, or in a common pool of dosing dosing, otherwise it would be two agents produced copolymer precipitate not only affect their results, but also prone to clogging vote plus equipment. Because of polyacrylamide solution is a DRA, calibration and water values ??larger gap. Therefore, polyacrylamide solution metering equipment must be calibrated with the solution may not be calibrated with water. Otherwise it will increase the dosage of polyacrylamide, both to improve the processing costs, will result in unnecessary consequences. Dosing concentration polyacrylamide more dilute solution, the better, the more dilute the concentration dosing solution enables the rapid expansion in the water, mixing and prevent excessive concentration of protective colloid phenomenon, affecting Effect. But the concentration is too thin can cause huge dosing equipment. General dosing concentration of 0.5% to 1% is appropriate to prepare a concentration of 2% is appropriate. Polyacrylamide flocculant, treatment of high turbidity water in batch dosing than one dosage of flocculation better. In settling velocity as a comparison value, the former is more than three times the latter. After the so-called batch administration, the dosage is divided into two parts, respectively in water and adding, to join the part of the flocculant mixing it with water to a rapid, separated by 1 ~ 2min, add another portion of flocculant, and then quickly mixed with the water. Because batches to avoid excessive dosing flocculant concentration and sediment binding consequences active groups were blocked, which can achieve better results. Batch dosing ratio generally the first dosing 60%, and then adding 40% better. In water supply engineering design under certain conditions, should be used in batches administration measures. Polyacrylamide when used as a coagulant, the general order of dosing after the coagulant. As alone as when dealing with high turbidity water flocculants, you should first polyacrylamide flocculant dosing, otherwise it will affect the results. Between dosing should be designed taking into account the changes in the order of dosing measures. 400-770-3343 For more information about please visit our website: PAM: www.lebangshui.com www.gylbjs.com PAC: www.lb0371.com If necessary, please contact: Manager Wu: 137,836,095,590,371 -66,488,833 Wang: 13838568817 0371-66488876