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Anonymous users2024-02-06Hello, my question I suggest to consider the problem of flocculant first, the selection of flocculant can directly affect the effect of sludge pressing of plate and frame machine. If the selection is good, the effect of flocculation and sedimentation of coal washing water is obvious and fast. As a result, the time for sludge pressing is shortened.
How to choose the right type of flocculant? There are two things to consider:
1. Molecular weight. If the molecular weight is too large, polyacrylamide encapsulates sludge particles, flocculation repels each other, flocculation effect is poor, and the effect of filtration or centrifugation is also poor.
Second, ionicism. The ionicity of cationic polyacrylamide is the charge density carried by the molecular chain of cationic polyacrylamide. The choice of cationic ionization often determines the sludge dewatering effect.
Different industries produce different sewage sludge, so the cationic polyacrylamide ionization used is also different. If the ions are too low, the sludge floc is not compact enough, and if the ions are too high, the sludge floc will have an excessive charge and be repulsed. In addition, the desliming equipment often has requirements for cationic polyacrylamide, generally speaking, the desliming centrifuge has slightly higher ionization requirements than the filter press.
The above are the most important factors affecting the use of Rihui polyacrylamide, and then which agent is more suitable through small tests. The small-scale test method is as follows: the selection of the polyacrylamide model of Rihui is generally based on the sludge to be treated, which needs to be selected in the laboratory.
Polyacrylamide solutions with different molecular weights and ionic degrees are prepared in the laboratory, mixed with the treated sludge under the same conditions, and then the flocculation effect is observed, such as the size of the floc and the moisture content of the floc.
Hope the above is helpful to you!
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Anonymous users2024-02-05As questioned: What is the reason why the sludge pressing time of the plate and frame filter press for coal washing water after adding flocculant becomes very long?
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Anonymous users2024-02-04Well. If in between, I still suggest that you take the electrician as a springboard for your career, the general company in the engineering category, electricians are on duty, just shift work, if you work shifts, then you have a lot of the rest of the time, the rest of the time, if you have a certain amount of capital, you can open a mobile phone repair store by yourself, of course, you may say that my mobile phone repair technology is not good, then it doesn't matter, you won't, you can say that you can't repair no accessories, many reasons I said these are the current social choices for job seekers FYI! Hehe.
The flocculation and precipitation method is to use inorganic flocculants (such as aluminum sulfate) and organic anionic flocculant polyacrylammonium (PAM) to prepare an aqueous solution and add it to the wastewater, which will produce a compressed electric double layer, so that the suspended particles in the wastewater lose stability, and the colloidal particles coagulate with each other to increase the particles and form flocs and alum flowers. After the floc grows to a certain volume, it will be separated from the aqueous phase and precipitated under the action of gravity, so as to remove a large amount of suspended solids in the wastewater, so as to achieve the effect of water treatment. In order to improve the separation effect, coagulants can be added in a timely and appropriate amount. >>>More
**High and low, if the use of anionic polyacrylamide, **between 9-13 yuan, if the use of cationic polyacrylamide, **between 10-17 yuan, ionization and hydrolysis are different, polyacrylamide ** has a large difference, secondly, according to the needs of users, polyacrylamide manufacturers can configure different content of polypropylene, ** is also different, **low products, usually used in large quantities.
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