高级氧化技术预处理丙烯腈工业废水的研究

发布时间：2018-09-14 18:53

【摘要】：丙烯腈工业废水是指在丙烯腈生产过程中产生的高浓缩废水,其具有难处理,毒性大等特点,目前主要靠焚烧法来进行处理,但是焚烧法处理废水能耗十分巨大,其能耗占丙烯腈生产能耗的30%-40%。目前丙烯腈工业废水的的处理研究方法比较多,但是低能耗领域主要集中在生物法和膜分离法。而生物法需要进行预处理后才可以进行进一步降解。本论文采用高级氧化技术作为预处理手段进行研究。本文丙烯腈工业废水的三类组成即急冷塔废水、乙腈废水和硫铵废水进行了分别的独立实验处理研究。急冷塔废水的有机物组成除了丙烯腈,乙腈,氢氰酸外,还有大量的3-吡啶甲腈,丁二腈,咪唑,对苯二酚及对苯二胺等有机物。乙腈废水中除乙腈,丙烯腈等主要有机物为甲基吡啶和甲基苯甲腈等;而硫铵废水组成组分更重。实验由臭氧独立高级氧化和紫外独立高级氧化两部分组成。实验结果表明,废水经过高级氧化后,废水中的TC、TOC,TN均有一定程度的下降;但是IC的处理效果不明显,在废水有机物组成上,经过高级氧化后,部分有机物经过氧化和异构化作用,含量上大量减少,同时生成了一定量的对于TC,TN贡献度较小的组分。研究表明,高级氧化处理比较合理的处理臭氧流量在4g/h,同时辅助以紫外照射可以提高处理效果,处理的时间上建议为20min,以达到经济效益最大化。
[Abstract]:Acrylonitrile industrial wastewater is a highly concentrated wastewater produced in the production process of acrylonitrile. It has the characteristics of difficult treatment and high toxicity. At present, the treatment of acrylonitrile industrial wastewater mainly depends on incineration, but the energy consumption of incineration treatment wastewater is very great. The energy consumption of acrylonitrile production is 30%-40%. At present, there are many methods for treating acrylonitrile industrial wastewater, but the low energy consumption is mainly concentrated in biological method and membrane separation method. The biological method needs to be pretreated before it can be further degraded. In this paper, advanced oxidation technology is used as a pretreatment method. In this paper, three kinds of industrial wastewater of acrylonitrile, I. e., urgent cooling tower wastewater, acetonitrile wastewater and ammonium sulfate wastewater, are studied separately. In addition to acrylonitrile, acetonitrile and hydrocyanic acid, there are also a large number of organic compounds such as 3-pyridinitrile, succinonitrile, imidazole, hydroquinone and p-phenylenediamine. The main organic compounds such as acetonitrile and acrylonitrile in acetonitrile wastewater are methyl pyridine and methyl benzonitrile. The experiment consists of ozone independent advanced oxidation and ultraviolet independent advanced oxidation. The experimental results show that the TC,TOC,TN in wastewater decreases to a certain extent after advanced oxidation, but the treatment effect of IC is not obvious. After oxidation and isomerization, the content of some organic compounds decreased greatly, and a certain amount of components which contributed less to TC,TN were formed at the same time. The results show that the ozone flow rate of the advanced oxidation treatment is 4 g / h and the ultraviolet irradiation can improve the treatment effect. It is suggested that the treatment time is 20 min to maximize the economic benefit.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X783

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