是否进口:否 | 产地:河南 | 型号:aj1-2-9333 |
品牌:安家净 | 有效物质含量:100% | PH值使用范围:5 |
是否危险化学品:否 | 目数:50 | 货号:aj12-22 |
名称:聚丙烯酰胺(PAM)系列 | 化学成份:聚丙烯酰胺 | 外观:白色 |
含量:100% | 包装规格:25kg | 执行质量标准:国标 |
CAS:182 | 规格:12 |
AM聚丙烯酰胺的合成及工艺物理特性:PAM由丙烯腈与水在骨架铜催化剂作用下直接反响生成聚丙烯酰胺再经离子交流聚合单调,等工序即得废品,工艺简介如下:催化剂:催化水合CH2=CHCN+H2O 湿度 CH2=CHCONH2 聚合nCH2=CHCONH2-引发剂-CH2CHCONH2
聚丙烯酰胺工业用处:聚丙烯酸胺(PAM)分子量高、水溶性好、可调理分子量,并能够引进各种离子基团以得到特定的性能。低分子量是分散资料有效增调剂或稳定剂,高分子量是重要的絮凝剂,它能够制造出亲水而水不溶性的凝胶,它对许多团体外表和溶解物质有良好的粘附力。由于以上性能PAM普遍应用于絮凝、增稠、减阻、拟胶、粘结、阻垢等范畴 。
阴离子聚丙烯酰胺依据不同用处和用户对产品性能的央求,可选用不同分子量运用。
在工业废水处置中,特别是关于悬浮颗粒、较粗、浓度高、粒子带阳电荷,水的PH值为中性工碱性的污水如钢铁厂废水,电镀厂废水,冶金废水,洗煤废水等污水处置效果很好。
在饮用水处置。我国很多自来水厂的水源自江河泥少及矿物质含量高,比拟混浊,虽经过沉淀处置,但仍达不到央求,需求投加絮凝剂,才干使水质变清,很多自来水厂采用无机絮凝剂,但投加量大,构成污泥量增大效果不好,采用阴离子聚丙烯酰胺作絮凝剂,投加量是无机絮凝的50分之一但效果是无机絮凝剂的几倍至几十倍,特别是我公司消费的聚丙烯酰胺,剩余单体已抵达食品级(小于0.05%),接近国外***程度,***,对处置饮用水更为合适,关于有机物污染严重的江河水和阴离子聚丙烯酰胺配合运用效果更好。
聚丙烯酰胺用作淀粉厂及酒精厂的流失淀粉及酒糟的回收。往常很多淀粉厂排出的废水内淀粉很高,排放之后影响环境,糜费资源,投加PAM,使淀粉沉淀,沉淀物经压滤机压滤变成饼类可作饲料,酒精厂大量的酒糟就是采用这种工艺加工的,黑龙江某酒精厂就是聚丙烯酰胺作絮凝剂,对酒糟中止回收的而且获得了很大的经济效益。
聚丙烯酰胺用作油田调剖堵水的堵水剂,三次采油的驱油剂。
聚丙烯酰胺用作造纸助剂,PAM在造纸方面用处很普遍,可作为长纤维造纸分散剂,干湿加强剂,助留,助滤剂及造纸废水的絮凝剂等。
***型的水处置剂聚丙烯酰胺,在很多场所处置污水和上水时,阴离子聚丙烯酰胺和阳离子聚丙烯酰胺配合运用要比单独运用一种离子型聚丙烯酰胺产生十分***和协同效应,PAM对降低外表张力的才干要远远大于同条件下阳离子或阴离子单独存在的才干,为抵达降低外表张力的央求,需求同时运用阴离子和阳离子聚丙烯酰胺,便两者如运用不当,会产生白色沉淀物,失去运用效果 。而PAM具有两性离子的特性,它能够完成阴离子、阳离子的配合协同作用,面没有任何沉淀物的产生,特别是对水质状况比拟复杂或水的性质经常变化的,运用PAM作为处置絮凝剂更为便当,效果更好。
在污水预处置中采用的污泥取自以钱塘江水为水源的沉淀池,该水厂以聚合氯化铝PAC为絮凝剂。污泥经自然浓缩到含固率为2.7%~2.8%,经测定,污泥中有机物含量为12.1%,sj如含量为52.1%,Al。含量为20.2%。 PAM有阳离子型、阴离子型和非离子型三品种型。非离子型PAM溶解速度较慢,普通不用于污泥预处置,因而实验仅选用两种有代表性的阳离子聚丙烯酰胺和阴离子聚丙烯酰胺。阳离子型PAM分子量1200万,丙烯酰胺单体含量0.012%。阴离子型PAM分子量1250万,丙烯酰胺单体含量0.013%。两种PAM配制浓度均为0.05%%,冰箱冷藏24h后运用。
(1)PAM预处置污泥取lOOml污泥,放入300ml的烧杯中,采用六联搅拌机以1130rpm的转速快 速搅拌30s后疾速投加~定量制备好的PAM,继续以lOOrpm的转速搅拌30s, 然后降低搅拌机转速到20~30rpm慢速搅拌60s促进絮凝。分别测定预处置后污泥的比阻、毛细吸水时间(CST)、过滤液的粘度和离心液的粘度。
(2)比阻按考克力(Coackley)提出的实验办法,采用布氏漏斗实验。布氏漏斗的直径为80mm,滤纸采用由70mm定量中速滤纸,实验真空度控制为0.01MPa。实验反复3次取均匀值。
(3)为了降低比阻,进步污泥脱水效果,在污泥脱水前普通均需对污泥中止预处置。污泥预处置的办法有冰冻一冻结预处置、热处置、酸处置、碱处置、石灰预处置和高分子絮凝剂预处置等,其中高分子絮凝剂聚丙烯酰胺(PAM) 预处置是目前国内外采用最普遍的预处置办法。
(4) 聚丙烯酰胺絮凝剂预处置普通占整个污泥处置费用较高的比例,因而,聚丙烯酰胺的优化选择和投加率的合理肯定对降低污泥预处置费用相当关键。对选择聚丙烯酰胺的实验办法的研讨已展开多年,包括比阻、CST值、污泥流变性、分别液粘度、活动电流等。The synthesis and process physical properties of AM polyacrylamide: PAM is prepared by direct reaction of acrylonitrile with water under the action of framework copper catalyst, and then dried by ion exchange polymerization. The process is as follows: catalyst: catalytic hydration CH2 = CHCN + H2 humidity CH2 = CHCONH2 polymerization nCH2 = CHCONH2 - initiator - CH2CHCONH2
Industrial uses of polyacrylamide: Polyacrylamide (PAM) has high molecular weight, good water solubility, adjustable molecular weight, and can introduce various ionic groups to obtain specific properties. Low molecular weight is an effective additive or stabilizer for dispersing materials. High molecular weight is an important flocculant. It can produce hydrophilic and water-insoluble gel, which has good adhesion to many groups of surface and dissolved substances. Because of the above properties, PAM is widely used in flocculation, thickening, drag reduction, glue imitation, bonding, scale inhibition and other fields.
Anionic polyacrylamide can be used in different molecular weights according to different uses and user's requirements for product performance.
In industrial wastewater treatment, especially for suspended particles, coarser, high concentration, positive charged particles, neutral and alkaline wastewater such as iron and steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater and other wastewater treatment effect is very good.
In drinking water treatment. The water source of many Waterworks in our country is low in mud and high in mineral content, which is turbid. Although it has been treated by precipitation, it still can not meet the requirements. Flocculants are needed to make the water quality clear. Many waterworks use inorganic flocculants, but the amount of inorganic flocculants is large, resulting in poor effect of sludge increase. Anionic polyacrylamide acrylamide monomer was 0.012%. The molecular weight of anionic PAM was 12.5 million and the content of acrylamide monomer was 0.013%. The concentration of two kinds of PAM is 0.05%. They are used after refrigeration for 24 hours.
(1) PAM pretreatment sludge takes lOml sludge and puts it into a 300 ml beaker. Six-unit mixers are used to mix at 1130 RPM speed for 30 seconds, and then the PAM is added to the sludge quickly and quantitatively. The PAM is stirred at lOOrpm speed for 30 seconds, then the speed of the mixer is reduced to 20-30 rpm and the slow stirring speed is 60 seconds to promote flocculation. The specific resistance of pretreated sludge, capillary water absorption time (CST), the viscosity of filtrate and the viscosity of centrifuge were measured.
(2) The specific resistance is tested by Brinell funnel according to the test method proposed by Coackley. The diameter of Brinell funnel is 80 mm. The filter paper is made of 70 mm medium speed filter paper. The vacuum degree of the test is controlled to 0.01 MPa. The experiment was repeated three times to get the average value.
(3) In order to reduce specific resistance and improve sludge dewatering effect, sludge should be pretreated before sludge dewatering. Sludge pretreatment methods include freeze-thaw pretreatment, heat treatment, acid treatment, alkali treatment, lime pretreatment and polymer flocculant pretreatment. Polymer flocculant polyacrylamide (PAM) pretreatment is the most widely used pretreatment method at home and abroad.
(5)实验研讨标明:投加阳离子型和阴离子型PAM后污泥比阻都降低近2个数量级,***改善了污泥的脱水性能。阴离子型PAM投加率为0.3kg/T干污泥,阳离子聚丙烯酰胺絮凝剂的投加率为1.5kg/T于污泥,可见阴离子型PAM的投加率远小于阳离子型PAM的投加率,且阴离子型PAM的价钱约是阳离子型PAM价钱的1/2,故阴离子型PAM可作为自来水厂污泥预处置药剂的。
(6)依据CST值变化肯定PAM最投加率与测定比阻得到的最投加率分歧。并且CST值与比阻之间存在线性相关关系,比阻值越大,CST值越大,因而能够采用CST值来近似替代污泥比阻反映污泥的脱水性能。与比阻相比,cST值测定快速、烦琐,不但适用于实验室研讨,还可用于消费现场,快速理解污泥脱水性能的变化,使操作人员及时调楚PAM投加率,俭省药剂费。is used as flocculant, and the dosage is inorganic flocculant. One fiftieth of the flocculants, but the effect is several times to dozens of times that of inorganic flocculants. Especially the polyacrylamide 我市监测能力不断增强,市监测中心站已建成符合的基础配套设施,可对气、水、声、土壤等进行监测,……抽丝剥茧,觅源。根据通知,对符合条件的新能源汽车,按照《暂行办法》有关核定上海本市财政补助金额。随着可再生能源生产的扩大和纯电动汽车的普及,石油市场上存在需求早晚会触顶的“需求峰值”讨论。“五个统一”无序拆解一台台废旧洗衣机生产线的入口,输送带将其自动滚运到一个的箱子里进行拆解粉碎, 主要是聚氯化物由于水体的酸度和碱度,它具有很强的附着力和脱水特性。它对污水成分的去除***,适用于洁净水,深受客户青睐。 加工酸化废水的物理化学和团聚氯化铝工艺的优势:相对酸性的水污染废水的处理需要根据酸水平测量聚集的氯化铝浓度,而碱性废水的处理相对容易因为在弱碱条件下,可以充分发挥聚氯化铝的作用,使清水中的污染物迅速凝结沉淀,不需要添加额外的助剂,酸性水污染废水需要添加中和剂以加强处理。目前,与许多处理工艺相比,使用物理化学聚氯化铝的选择相对较好,处理效果尤为明显。随着酸碱废水处理技术的逐步成熟,加工技术有很多,现在酸碱废水也已被处理掉。 water quality or the changeable nature of water.
The sludge used in sewage pretreatment is taken from the sedimentation tank with Qiantang River water as its source of water, and PAC is used as a flocculant in the water plant. The sludge was natura阴离子聚丙烯酰胺水解度越高越好吗?其实这个问题太抽象了,阴离子聚丙烯酰胺不一定水解度越高就好;应该关于某类型的污水,阴离子挑选哪种水解度的适宜。 咱们先了解一下,阴离子聚丙烯酰胺 的制备与那些要素有联系: 丙烯与丙烯酰胺单体合成聚丙烯酰胺的反应为自由基聚合反应,聚合速度、共聚物的组成、产品分子量及其分子量散布等是衡量该反应的重要目标,影响这些目标的要素首要有反应的温度、反应液的碱 度、引发系统、单体的比率及浓度等。 上面是比较学术型,如果看不懂没联系,咱们有简单一点的说法。 点击翻开原图 阴离子聚丙烯酰胺的分子量是差异他们的一个目标,阴离子分子量大多都在800-2000万之间。 跟着水解度的添加,羧基阴离子添加,分子链不断伸展,然后有使絮凝作用逐渐增强的作用;一起,聚丙烯酰胺分子的负电性亦逐渐增强,又阻碍了其与负电性的泥沙杂质相吸附,并且在吸附架桥中起 首要作用的活性基团-酰胺基也不断减少,然后跟着水解度的添加,又存在使絮凝作用逐渐变差的要素。 阴离子聚丙烯酰胺作为综合成果:水解比过大,加碱费用较高,水解比过小,又会使反应不足,阴离子型聚丙烯酰胺的混凝或助凝作用较差。 所以阴离子聚丙烯酰胺不一定水解度越高越好,什么都会有个限度,适宜的才是zui优的河南安家净环保是一家专业出产各种水处理药剂,致力于绿色环保可再生资源的继续使用,很多投入了科 研资金,首要产品有聚丙烯酰胺絮凝系列,聚合氯化铝系列,聚合硫酸铁系列,碱式氯化铝等均受到全国客户的一致好评,咱们将一如即往的出产出品质优质的产品来报答客户对咱们一向的支持was 20.2%. There are three types of PAM: cationic, anionic and nonionic. Non-ionic PAM dissolves slowly and is generally not used for sludge pretreatment. Therefore, only two representative cationic polyacrylamides and anionic polyacrylamides are selected in the experiment. The molecular weight of cationic PAM was 12 million and the content of
(7)不管是阳离子聚丙烯酰胺絮凝剂还是阴离子聚丙烯酰胺絮凝剂,随着投加率的增加,滤液和离心液粘度都呈现与比阻和CST值类似的变化规律,呈现了明显的最小值,而且该最小值对应投加率与污泥比阻和CST值实验得到的投加率根本分歧。该办法断定PAM投加率快速、简单,而且还有可能用作消费上在线控制PAint最 佳投加率的参数,但其在消费上的应用还需做进一步的实验研讨。