方法所得出的分類是不一樣的，假如依照離子型可分為陰、非、兩性及陽(yáng)離子聚丙烯酰胺，假如依照形狀的話，能夠分為膠體、渙散液、乳液和干粉顆粒四種形狀，那么這四種形狀哪一種更適合我們呢？公司給您一些主張，接下來(lái)是我們的經(jīng)歷所得，希望您會(huì)感興趣。
??在平常假如我們常常運(yùn)用，能夠選擇干粉顆粒狀聚丙烯酰胺，The classification obtained by the b is different. If the ionic type can be divided into Yin, non, amphoteric and cationic polyacrylamide, if according to the shape, it can be divided into four shapes: colloid, laxity, emulsion and dry powder. Which of these four bs is more suitable for us? The company gives you some suggestions. Next is our experience. I hope you will be interested.
In general, if we often use it, we can choose dry powder granular polyacrylamide. Because of its highest solid content, dry powder polyacrylamide is generally stored in dry and cool places for more than two years, but if mixed with solution, its storage time will be limited. Generally speaking, when the concentration of solution is 0.1%, non-ionic and anionic polyacrylamide will dissolve. The stability of cationic polyacrylamide solution depends on the concentration of the solution. For example, the more concentrated the solution is, the longer the storage time of 3%-5% solution is, but the 3%-5% solution can not be directly used to treat sewage. This solution needs to be diluted before use, and the PH value of cationic polyacrylamide solution is less than 5.5. Stability, if greater than 6.0, will be due to hydrolysis and failure, water medium dispersion polyacrylamide shelf life of six months.
Therefore, polyacrylamide is still a better choice of solids, can be used with the mix, do not cause waste.
Of course, we must pay attention to the conditions and taboos of preserving polyacrylamide. Polyacrylamide is more sensitive to iron ions, calcium ions and magnesium ions than anionic polymers. In particular, iron ions are catalysts for the chemical degradation of all polyacrylamide. Therefore, in the manufacture, handling and storage of polyacrylamide solutions, we must try to avoid iron ions entering and touching the solution. The equipment should be made of plastics, stainless steel, FRP or carbon steel with surface coating resin.由于它的固含量，一般情況下干粉聚丙烯酰胺在干燥、陰涼的當(dāng)?shù)厥羌拇娑暌陨系?，但假如配成溶液的話，它的寄存時(shí)刻就有限了，一般說(shuō)，溶液濃度為0.1%的時(shí)候，非離子與陰離子聚丙烯酰胺溶液不會(huì)超過(guò)一周的時(shí)刻，陽(yáng)離子聚丙烯酰胺溶液則不會(huì)超過(guò)一天，而且溶液的穩(wěn)定性與溶液的濃度有關(guān)，配的濃度越濃，例如3%——5%的溶液寄存時(shí)刻越長(zhǎng)，但3%——5%的溶液不能直接去處理污水，這種在運(yùn)用前需要稀釋，陽(yáng)離子聚丙烯酰胺溶液PH值小于5.5的時(shí)后比較穩(wěn)定，假如大于6.0的話，就會(huì)由于水解的原因而失效，水介質(zhì)渙散型聚丙烯酰胺保質(zhì)期為六個(gè)月。
??所以聚丙烯酰胺仍是選用固體的比較好，能夠做到隨配隨用，不造成糟蹋。
??當(dāng)然大家一定要注意保存聚丙烯酰胺各種條件和忌諱，聚丙烯酰胺對(duì)鐵離子、鈣離子、鎂離子比陰離子聚合物質(zhì)靈敏，尤其是鐵離子是造成所有聚丙烯酰胺化學(xué)降解的催化劑，所以在制造、搬運(yùn)與儲(chǔ)存聚丙烯酰胺溶液的話，一定要盡量避免鐵離子進(jìn)入與溶液觸摸設(shè)備要用塑料、不銹鋼、玻璃鋼或表面涂料樹(shù)脂的碳鋼制造。
