循环水排污水中残余药剂对反渗透膜性能的影响

发布时间：2017-12-28 00:19

本文关键词：循环水排污水中残余药剂对反渗透膜性能的影响　出处：《中国石油大学(华东)》2015年硕士论文　论文类型：学位论文

【摘要】：为了保证循环冷却水系统长期稳定的运行,需要定期对其进行排污处理。循环冷却水排污水中除含有大量的盐类之外,还含有为防腐、防垢、杀菌而加入的各种水处理药剂。如果我们能够对循环冷却水排污水进行一定处理,将其回用为循环冷却水补充水,甚至锅炉补充水,则可以节省大量的新鲜水,提高水资源利用率,在减轻环境污染的同时为企业带来可观的经济效益。本文首先根据循环水排污水的水质特点,设定了一套处理工艺(混凝沉淀+石英砂过滤+活性炭吸附+反渗透),优化了各工艺的工艺参数,并考察了各工艺的影响因素;然后考察了排污水中的药剂对混凝效果及混凝剂投加量的影响;最后在此工艺基础上考察了排污水中的药剂(单体药剂和复配药剂)在静态和动态条件下对反渗透膜用阻垢剂和反渗透膜性能的影响。实验表明:(1)优化PAC和PAM的投加量分别为40 mg/L和0.8 mg/L时,混凝效果最好,浊度去除率可达93.49%。PASP对混凝效果影响最大且剩余浊度波动性大,波动范围0.85-1.78 NTU。十二烷基二甲基苄基氯化铵(1227)对PAC最佳量影响最大,波动范围20-70 mg/L。复配药剂存在条件下,出水剩余浊度都大于无药剂时的0.98 NTU。(2)循环水排污水中的药剂对膜用阻垢剂产生了较大的影响。静态试验中,5 mg/L 1227对ZC-R1200产生了最大作用,阻垢率下降了88.84%。动态试验中,单体药剂PASP、HEDP、ATMP和NaClO3的浓度分别为20 mg/L时,通量比下降最大,分别为4.07%,11.45%、11.29%和3.98%。15 mg/L PASP和15 mg/L HEDP复配时,通量比下降最大,为15.38%。(3)不同药剂在不同浓度下对反渗透膜通量产生较大的影响。在50 mg/L PASP时,通量比下降最小,为5.53%,远小于空白时的18.95%,相反,在50 mg/L1227时,通量比下降最大,为46.63%,而此时的脱盐率则达到最大,为99.59%。
[Abstract]:In order to ensure the long-term and stable operation of the circulating cooling water system, it is necessary to treat it regularly. In addition to a large amount of salt, the circulating cooling water wastewater contains various water treatment agents for anticorrosion, anti scaling and sterilization. If we are able to discharge of circulating cooling water to a certain treatment, the supplement of water reuse for circulating cooling water and boiler water, and can save a large amount of fresh water, improve the utilization of water resources, bring considerable economic benefits for the enterprise at the same time to reduce environmental pollution. According to the characteristics of water quality of circulating water, set up a set of treatment process (coagulation + quartz sand filtration + activated carbon adsorption + reverse osmosis), process parameters were optimized, and the effects of the factors affecting the process; and then inspected the sewage medicament on coagulation and mixing the coagulant dosage; finally this process was studied on pharmacy sewage (single drug and drug combination) influence on the static and dynamic conditions on the reverse osmosis membrane scale inhibitor and reverse osmosis membrane performance. The experiment shows that: (1) when the dosage of PAC and PAM is optimized to 40 mg/L and 0.8 mg/L, the coagulation effect is best and the removal rate of turbidity can reach 93.49%. PASP has the greatest influence on the coagulation effect and the volatility of residual turbidity is large, and the range of fluctuation is 0.85-1.78 NTU. The twelve alkyl two methyl benzyl ammonium chloride (1227) has the greatest influence on the optimal amount of PAC, and the fluctuation range is 20-70 mg/L. Under the presence of compound agents, the residual turbidity of the effluent was more than 0.98 NTU without the drug. (2) the reagents in the circulating water wastewater have a great influence on the scale inhibitor. In the static test, 5 mg/L 1227 had the greatest effect on ZC-R1200, and the scale of scale inhibition decreased by 88.84%. In dynamic tests, when the concentration of PASP, HEDP, ATMP and NaClO3 of the monomers is 20 mg/L, the flux ratio is the largest, which is 4.07%, 11.45%, 11.29% and 3.98%, respectively. The flux ratio of 15 mg/L PASP and 15 mg/L HEDP was the largest, which was 15.38%. (3) the flux of the reverse osmosis membrane has a great effect on the flux of the reverse osmosis membrane at different concentrations. At 50 mg/L PASP, the flux ratio decreased to 5.53%, which was much less than 18.95% of the blank. Instead, at 50 mg/L1227, the flux ratio decreased to 46.63%, while the desalination rate reached the maximum at 99.59%.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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