独山子石化千万吨炼油循环水处理缓蚀剂和杀菌灭藻剂的优化

发布时间：2018-03-29 15:38

本文选题：独山子石化　切入点：水处理　出处：《石河子大学》2015年硕士论文

【摘要】：本论文紧密结合独山子石化炼油新区生产实际,根据水质特性,对缓蚀剂、阻垢剂进行了筛选,并系统研究了缓蚀剂间、阻垢剂间的协同作用,利用各单剂间的协同效应将多种缓蚀剂、阻垢剂进行复配,优化出了高效复合型缓蚀阻垢剂配方并进行了性能评价。根据循环冷却水中的状况进行了杀菌灭藻剂的筛选,进而优化了杀菌灭藻方案。循环冷却水补水性质分析表明,当浓缩倍数为1时,其稳定指数为6.866,水质具有腐蚀倾向,应考虑加入缓蚀剂进行处理;随着浓缩倍数的逐渐增大,稳定指数逐渐减小,当浓缩倍数为4时,稳定指数下降为4.2,具有严重的结垢倾向,在进行水处理药剂的添加上需要同时考虑结垢和腐蚀。缓蚀剂、阻垢剂的筛选、相互作用研究表明,缓蚀单剂2-膦酰基-1,2,4三羧酸(PBTCA)相比于2-羟基膦酰基乙酸(HPAA)和羟基乙叉二膦酸(HEDP)具有更优异的缓蚀性能。相比于单一缓蚀剂,PBTCA+乙酸锌、HEDP+乙酸锌、PBTCA+HEDP+乙酸锌三元复配体系均呈现出优异的缓蚀性能,复配体系呈现出极好的缓蚀协同性。阻垢单剂聚马来酸酐(HPMA)、2-丙烯酰胺-2-甲基丙基磺酸(AMPS)的阻垢性能不如PBTCA。PBTCA与HPMA、PBTCA与AMPS两两之间存在明显的阻垢协同效应,而AMPS与HPMA不存在协同效应。通过正交实验优化出的复合型缓蚀阻垢剂配方的组成为PBTCA 15 mg/L、HEDP 25mg/L、乙酸锌2 mg/L及AMPS 25 mg/L,该配方的腐蚀率为0.0126 mm/a,缓蚀率为98.65%,阻垢率为93.52%。优化配方的阻垢缓蚀性能优异,且含磷含锌量较低,属于环保配方,性能指标均满足GB 50050-2007《工业循环冷却水处理设计规范》的规定。杀菌灭藻剂的筛选和杀菌灭藻方案优化的结果表明,在非氧化型杀菌灭藻剂中,异噻唑啉酮和复合型杀菌剂的杀菌效果要优于季铵盐,而异噻唑啉酮和复合杀菌的效果相差不大。氧化型杀菌灭藻剂次氯酸钠的效果十分显著。本文优化出的杀菌灭藻剂与缓蚀阻垢剂有很好的相容性并且杀菌灭藻剂的加入对缓蚀阻垢剂的缓蚀阻垢效果没有影响。杀菌灭藻方案优化的结果是采取连续投加氧化性杀菌灭藻剂次氯酸钠为主,并定期冲击式加入非氧化性杀菌剂(复合杀菌剂和异噻唑啉酮交替使用)的杀菌灭藻方案。
[Abstract]:In this paper, based on the production practice of Dushanzi Petrochemical Refinery New area, corrosion inhibitor and scale inhibitor were screened according to the water quality characteristics, and the synergism between corrosion inhibitor and scale inhibitor was studied systematically. By using the synergistic effect of each single agent, several kinds of corrosion inhibitor and scale inhibitor were mixed, the formulation of high efficiency compound corrosion and scale inhibitor was optimized, and the performance evaluation was carried out. According to the condition of circulating cooling water, the fungicidal and algicide agent was screened. The rehydration property analysis of circulating cooling water shows that the stability index is 6.866 when the concentration ratio is 1, the water quality has corrosion tendency and should be treated with corrosion inhibitor. The stability index decreases gradually, when the concentration multiple is 4, the stability index decreases to 4.2, which has a serious scaling tendency. It is necessary to consider both scaling and corrosion in the addition of water treatment medicament. Interaction studies show that. Compared with 2-hydroxyphosphonyl acetic acid (HPAA) and hydroxyl ethyldiphosphonic acid (HEDPp), the corrosion inhibitor (2-phosphonyl group) has better corrosion inhibition properties than that of 2-hydroxyphosphonyl acetate (HPAA) and hydroxyl ethyldiphosphonic acid (HEDPDP). The system showed excellent corrosion inhibition performance. The scale inhibition performance of the compound system is not as good as that of PBTCA.PBTCA and HPMA-PBTCA and AMPS, and the scale inhibition is not as good as that of PBTCA.PBTCA and HPMA-2-methylpropyl sulfonic acid (AMPS), and the scale inhibition is not as good as that of HPMA-2-acrylamide-2-methylpropyl sulfonic acid (AMPS). There is no synergistic effect between AMPS and HPMA. The composition of compound corrosion and scale inhibitor optimized by orthogonal experiment is PBTCA 15 mg / L HEDP 25 mg / L, zinc acetate 2 mg/L and AMPS 25 mg / L, the corrosion rate is 0.0126 mm / a, the inhibition rate is 98.65 mm / a, and the scale inhibition rate is 93.52 mm 路L ~ (-1). The scale and corrosion inhibition performance of the chemical formulation is excellent. The phosphorus and zinc content is low, which belongs to the environmental protection formula, and the performance indexes all meet the requirements of GB50050-2007 < Design Code for Industrial circulating cooling Water treatment]. The results of screening of bactericidal and algicide agents and optimization of the scheme of bactericidal and algicide control show that, The bactericidal effect of isothiazolinone and compound fungicides is better than that of quaternary ammonium salt in non-oxidized bactericidal algaecide. However, the effect of isothiazolinone and compound bactericidal agent is not different. The effect of oxidized algaecide sodium hypochlorite is very remarkable. The optimized bactericidal algaecide has good compatibility with corrosion and scale inhibitor and bactericidal algicide. The result of optimization of bactericidal and algicide scheme is that sodium hypochlorite, an oxidizing bactericidal and algaicidal agent, is added continuously. In addition, non-oxidizing fungicides (compound fungicides and isothiazolinone alternately used) were added periodically.
【学位授予单位】：石河子大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ085.4;TE65

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