橡胶促进剂生产废水资源化利用技术研究

发布时间：2018-06-29 13:11

本文选题：橡胶促进剂生产废水 + 预处理　；参考：《天津科技大学》2017年硕士论文

【摘要】：橡胶促进剂生产废水的COD浓度大、盐份含量高、可生化性差,且含有大量的难降解有机物。本文针对这一问题进行了研究,希望找到适合的治理橡胶促进剂废水的方法。本文以橡胶促进剂生产废水为主要研究对象,采用混凝-次氯酸钠催化氧化工艺对该废水进行预处理。预处理之后,蒸发出盐。在混凝-NaClO催化氧化处理之前,先进行回收叔丁胺和加酸酸化的处理。实验主要内容及结论如下:(1)加酸酸化试验,实验结果表明:pH值为3,在曝气条件下,反应时间为100min时,COD去除率为26.09%。(2)混凝试验,实验结果表明:影响混凝处理效果因素的主次顺序为:PAC投加量pH值PAM投加量;最佳运行条件为:pH值为8, PAC投加量为1000mg·L-1,PAM投加量为8mg·L-1。最佳运行条件下,对废水的COD去除率为31.97%。(3) NaClO催化氧化试验中,实验结果表明:影响NaClO催化氧化处理效果因素的主次顺序为:NaClO投加量活性炭用量反应时间pH值;最佳运行条件为:pH值为4, NaClO投加量为10mL·L-1,活性炭用量为20g·L-1,反应时间为1h。最佳运行条件下,对废水的COD去除率为51.27%。综合实验结果,确定废水的预处理工艺流程为:废水→回收叔丁胺→加酸酸化→混凝→次氯酸钠催化氧化。总的COD去除率可达76.25%,处理效果良好。(4)蒸发试验中,实验结果表明:影响冷凝液水质的主要因素是有机物的挥发和剧烈沸腾时的蒸汽夹带,从而导致蒸发前期和后期的冷凝液水质较差而中期的冷凝液水质较好,宜分段收集利用。所以在实际工程中,回用冷凝水时,尽量选取蒸发中期的冷凝水,避免蒸发前期和后期对回用冷凝水的污染。蒸发出的盐中主要为NaCl且纯度达99.542%,纯度较高,盐质较白。
[Abstract]:The wastewater from rubber accelerator production is characterized by high COD concentration, high salt content, poor biodegradability and a large amount of refractory organic matter. In order to find a suitable treatment method for rubber accelerator wastewater, this paper studied this problem. In this paper, the wastewater from rubber accelerator production was pretreated by coagulation-sodium hypochlorite catalytic oxidation process. After pretreatment, salt is evaporated. Before the coagulation-NaClO catalytic oxidation treatment, the recovery of tert-butylamine and the addition of acid were carried out. The main contents and conclusions of the experiment are as follows: (1) adding acid test, the experimental results show that the removal rate of 100min is 26.09 when the aeration time is 100min and the pH value is 3. (2) Coagulation test. The experimental results show that the primary and secondary order of the factors affecting the coagulation effect is the dosage of 1000mg, pH, and the optimal operation conditions are as follows: the dosage of 1000mg L 1 and the dosage of 8mg L 1 are 8 and 8, respectively, and the optimum operating conditions are as follows: the dosage of 1000mg L 1 is 8, and the dosage of 1000mg L 1 is 8mg L 1. Under the optimum operating conditions, the COD removal rate of wastewater is 31.97. (3) in the experiment of catalytic oxidation of NaClO, the experimental results show that the order of factors affecting the treatment effect of NaClO catalytic oxidation is the pH value of reaction time when the dosage of activated carbon is added to NaClO; The optimum operating conditions were as follows: the pH value was 4, the dosage of NaClO was 10 mL / L ~ (-1), the dosage of activated carbon was 20 g / L ~ (-1) and the reaction time was 1 h. Under the optimum operating conditions, the COD removal rate of wastewater is 51.27. According to the experimental results, the pretreatment process of wastewater was determined as follows: the recovery of tert-butylamine from wastewater and the catalytic oxidation of sodium hypochlorite with acidated and acidated tert-butylamine. The total COD removal rate can reach 76.25, and the treatment effect is good. (4) in the evaporation test, the main factors that affect the water quality of condensate are the volatilization of organic matter and the vapor entrainment when boiling violently. As a result, the water quality of the condensate in the early and late stage of evaporation is poor, while the water quality in the middle stage is better, so it is appropriate to collect and utilize the condensate by stages. So in the practical engineering, the condensate water in the middle stage of evaporation should be chosen as far as possible when reusing condensate water, to avoid the pollution of the reused condensate water in the early and late stage of evaporation. The salt evaporated was mainly NaCl with a purity of 99.542 and a higher purity and whiter salt quality.
【学位授予单位】：天津科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X783.3

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