??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 method 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 forms is more suitable for us? The company gives you some suggestions. Next is our experience. I hope you will be interested.發(fā)展，環(huán)境污染的原則越來用于醫(yī)存時(shí)間:隨著儲存時(shí)間的增加，PAM溶液降解越多，粘度越低，絮凝效果越差。通常，陰離子PAM溶液可以儲存7天，陽離子PAM溶液可以儲存24小時(shí)。這是由于酰胺基團(tuán)的水解和羥基含量的增加。尤其是陽離子基團(tuán)的影響更為明顯。由于分子鏈剛性的增加，酰胺基除去NH3生成酰亞胺基。
2、溫度影響: 0.1液體，當(dāng)溫度達(dá)到80 - 90℃時(shí)，1800萬的分子量會在2 - 4小時(shí)內(nèi)降解到500萬左右，并且降解會隨著溫度的升高而變得越來越快。在25℃的室溫下性能穩(wěn)定。
懸浮在有機(jī)溶劑中的單體水溶液與小液珠的聚合稱為懸浮聚合，也稱為珠聚合。懸浮聚合物主要由單體、引發(fā)劑、有機(jī)溶液和懸浮劑組成。引發(fā)劑溶解在單體水溶液中。分散劑也被稱為懸浮劑。其功能是在攪拌下將單體水溶液分散成小液珠，并將其懸浮在有機(jī)溶劑中，以防止聚合顆粒在聚合過程中相互粘附。產(chǎn)品的粒度一般為100-2000 μ m
Storage time: With the increase of storag胺稱為聚氯化鋁或者絮凝劑等等。聚合氯化鋁和傳統(tǒng)的無機(jī)混凝劑的不同在：傳統(tǒng)無機(jī)混凝劑是低分子結(jié)晶鹽，聚合氯化鋁是由各種不同的化學(xué)物質(zhì)經(jīng)高溫高壓聚合而成，絮凝沉淀快速，對管道設(shè)備腐蝕性小，凈水效果優(yōu)異，能較好的去除水中各種有害重金屬離子。
銷售市場銷量最高的絮凝劑。聚合氯化鋁具有絮凝體生成快、沉降性能好、水中堿度消耗低的優(yōu)點(diǎn)，尤其對水溫、酸堿度、濁度和有機(jī)物含量的變化適應(yīng)性強(qiáng)。事實(shí)上，聚合氯化鋁的整個(gè)絮凝過程也是一個(gè)失穩(wěn)過程。所謂失穩(wěn)，就是讓膠體粒子失去穩(wěn)定性的過程。原本均勻分散在液體中的固體顆粒結(jié)合成大顆粒，然后沉淀出來，超過了凈水的目的。影響其有效性的因素也很多，如溶液的PH值、溫度、攪拌速度、攪拌時(shí)間、水體特性等。現(xiàn)階段，由于它的諸多優(yōu)點(diǎn)，很受大家的歡迎。目前，我們還開發(fā)了復(fù)合無機(jī)高分子絮凝劑。這類絮凝劑的絮凝特性和沉降性能會在聚合氯化鋁的水平上更進(jìn)一步，相信未來會占據(jù)很大的銷售市場！
在處理污水時(shí)怎么樣選擇適用的聚合氯化鋁，在處理污水通常使用聚合氯化鋁，無論是在產(chǎn)品質(zhì)量上還是在產(chǎn)品價(jià)格上，任何消費(fèi)者都希望自己購買的產(chǎn)品是優(yōu)異的，質(zhì)量才是消費(fèi)者選擇的一個(gè)重要標(biāo)準(zhǔn)。
非離子型聚丙烯酰胺更適用弱酸性污水絮凝沉降及污泥脫水。ize of the product is generally 100-2000 um.
2、乳液聚合的不同之處在于單體溶液的分散程度相對較低，其通常作為珠粒懸浮在有機(jī)相中。因此，所用的有機(jī)載體是比重較大的溶劑，如二甲苯、甲基氯乙烯等。分散劑通常不使用高活性乳化劑；攪拌強(qiáng)度也低于乳液聚合。懸浮聚合得到的產(chǎn)品為顆粒狀，使用方便。
3、在懸浮聚合溶液中，在懸浮劑如Span60、無機(jī)酰胺、C12-C18脂肪酸鈉或乙酸丁酸纖維的存在下，丙烯酰胺水溶液在汽油、二甲苯和甲基氯乙烯中形成穩(wěn)定的懸浮液以引發(fā)聚合。懸浮聚合結(jié)束后，共沸脫水、分離、干燥，得到珠狀或粉末狀產(chǎn)品。在聚合過程中加入無機(jī)鹽氯化鈉、納米3或Na2NO3可以調(diào)節(jié)體系的表面張力，提高懸浮穩(wěn)定性，但對聚合過程影響不大。然而，加入少量的單羧酸鹽、二羧酸鹽或多羧酸鹽通常會增加產(chǎn)物的相對分子量并降低聚合速率The dispersion of monomer solution is relatively low, and it is usually suspended in organic phase as beads. Therefore, the organic carriers used are solvents with large proportion, such as xylene, methyl vinyl chloride and so on. Dispersants usually do not use highly active emulsifiers, and the stirring strength is lower than that of emulsion polymerization. The product obtained by suspension polymerization is granular and easy to use.
3. In suspension polymerization solution, in the presence of suspension agents such as Span60, inorganic amides, C12-C18 fatty acid sodium or butyric acid acetate fibers, acrylamide aqueous solution forms stable suspensions in gasoline, xylene and methyl vinyl chloride to initiate polymerization. After suspension polymerization, azeotropic dehydration, separation and drying were carried out to obtain beaded or powdered products. Adding inorganic salts such as sodium chloride, nano-3 or Na2NO3 during the polymerization process can adjust the surface tension of the system and improve the suspension stability, but it has little effect on the polymerization process. However, the addition of small amounts of monocarboxylate, dicarboxylate or polycarboxylate usually increases the relative molecular weight of the product and reduces the polymerization rate.
3. Mechanical effect: Stirring can improve the dissolution rate of PAM dry powder. High stirring speed will cut off the molecular chain of polyacrylamide. It is suggested that the stirring speed be controlled online to 60 rpm/min instead of using high-strength stirring equipment and high-speed conveying equipment.
4. The influence of illumination: illumination will raise temperature, dissolve and degrade polyacrylamide, while direct ultraviolet irradiation will quickly degrade and dissolve. Direct exposure to intense light for 3 - 5 hours will reduce the molecular weight of PAM by 30 - 50
5. Impurities: Dissolving PAM powder, optimizing the use of neutral water, high hardness of water, or containing impurities, will affect the viscosity and use effect of PAM.
3、機(jī)械作用效果:攪拌可以提高PAM干粉的溶解速度，高強(qiáng)度攪拌速度會切斷聚丙烯酰胺的分子鏈，建議在線控制攪拌速度至60轉(zhuǎn)/分鐘，而不是使用高強(qiáng)度攪拌設(shè)備和高速輸送設(shè)備。
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.由于它的固含量最高，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，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超過一周的時(shí)刻，陽離子聚丙烯酰胺溶液則不會超過一天，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，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。
