新型三元共聚物阻垢剂性能评价及应用研究

发布时间：2019-02-13 20:46

【摘要】：在循环冷却水系统中,因水分蒸发浓缩,浓缩倍率的提高,水中很容易产生结垢和腐蚀现象,工业上通常采用投加缓蚀阻垢药剂来抑制和缓解这一现象。而目前所使用的阻垢剂主要是含磷聚合物和羧酸盐聚合物阻垢剂,含磷聚合物易水解,水中磷含量过高会引起水体富营养化;羧酸类聚合物不易被生物降解,对环境产生影响。所以本文研究了一种无毒、无磷、易生物降解的新型三元共聚物β-CD-MA-SSS的阻垢性能及其它性能,并对武钢生产废水进行阻垢性能评价,为其工业应用提供数据支撑。通过对新型三元共聚物β-CD-MA-SSS的静态阻垢实验发现,聚合物β-CD-MA-SSS具有很好的阻碳酸钙性能,当聚合物投加量为20mg/L时,对碳酸钙的阻垢率达到84.36%,在低硬度低碱度的冷却水中能更好地发挥阻垢作用;对硫酸钙的阻垢效果一般,当聚合物投加量为10mg/L时,对硫酸钙的阻垢率为27.78%,当聚合物投加量为超过20mg/L时,会出现致垢现象;在低浓度磷酸根离子条件下,对磷酸钙阻垢性能优异。对钙镁离子同时存在的混合溶液阻垢实验结果表明,钙镁离子比为3:1,且钙离子浓度为150mg/L,镁离子浓度为50mg/L,共聚物β-CD-MA-SSS投加量为25mg/L时,对混合液的阻垢率能达到90.97%。另外,聚合物对氧化铁也具有一定的分散性,当投加量为30mg/L时,透光率可达到67.1%,还具有较好的抗盐性,能在盐度较高的环境中使用。对武钢废水的阻垢实验表明,最佳投药量为30mg/L,阻垢率可达到83.85%,对实际废水表现出良好的阻垢效果。综合阻垢效果、环境影响和经济效益等因素,该新型共聚物阻垢剂具有一定的推广意义。
[Abstract]:In the circulating cooling water system, due to the evaporation and concentration of water and the increase of concentration ratio, scaling and corrosion are easy to occur in water, which is usually suppressed and alleviated by adding corrosion and scale inhibitor in industry. However, the scale inhibitor used at present is mainly phosphorus-containing polymer and carboxylate polymer scale inhibitor. The phosphorus-containing polymer is easy to hydrolyze, and the high phosphorus content in water will lead to eutrophication of water body, and carboxylic acid polymer is not easily biodegradable and has an impact on the environment. Therefore, the scale inhibition and other properties of a new type of terpolymer 尾-CD-MA-SSS, which is nontoxic, phosphorous and biodegradable, are studied in this paper. The scale inhibition performance of WISCO wastewater is evaluated to provide data support for its industrial application. Through the static scale inhibition experiment of the new terpolymer 尾-CD-MA-SSS, it is found that the polymer 尾-CD-MA-SSS has good performance in inhibiting calcium carbonate. When the dosage of polymer is 20mg/L, the scale inhibition rate of calcium carbonate reaches 84.36%. In the cooling water with low hardness and low alkalinity, the scale inhibition can be played better. When the polymer dosage is 10mg/L, the scale inhibition rate of calcium sulfate is 27.78. When the polymer dosage is more than 20mg/L, the scaling phenomenon will occur. Under the condition of low concentration of phosphate ion, the scale inhibition of calcium phosphate is excellent. The scale inhibition experiment of mixed solution with calcium and magnesium ions at the same time shows that when the ratio of calcium to magnesium ion is 3: 1, the concentration of calcium ion is 150 mg / L, the concentration of magnesium ion is 50 mg / L, and the dosage of copolymer 尾-CD-MA-SSS is 25mg/L, The scale inhibition rate of the mixture can reach 90.97. In addition, the polymer also has a certain dispersity to ferric oxide. When the dosage of 30mg/L is added, the transmittance can reach 67.1, and it also has good salt resistance and can be used in the environment with high salinity. The scale inhibition experiment of WISCO wastewater shows that the optimal dosage is 30 mg / L, and the scale inhibition rate can reach 83.85, showing good scale inhibition effect on actual wastewater. The new copolymer scale inhibitor has a certain popularizing significance by synthesizing factors such as scale inhibition effect, environment influence and economic benefit.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ085.4

【参考文献】