喷水织造废水处理及回用工程与关键技术研究

发布时间：2018-03-10 21:53

  本文选题：喷水织造废水　切入点：聚丙烯酸酯浆料　出处：《东华大学》2016年硕士论文　论文类型：学位论文

【摘要】：喷水织机作为当前中国纺织业中应用最广泛的织造设备之一,其优点是产量高、质量好、织造费用低,但是要消耗大量的新鲜水源,截至目前我国已经拥有喷水织机35.5万台,年用水量达到4.5亿吨。因为织造过程中会使用润滑脂和浆料,所以导致出水的COD、SS较高,如果不能有效的对喷水织造废水进行处理,循环利用,则会导致巨大的水环境污染和资源浪费。随着水资源的日益紧张和各地水质排放标准的日趋严格,纺织行业废水的有效治理和回用事关企业的生存和发展。因此喷水织造废水的处理和中水回用势在必行。论文详细剖析了岜山织造公司现有规模为3000m3/d的喷水织造废水处理及回用工程,并对该工程案例展开了经济性分析;在此基础上提出了该工程案例的关键技术瓶颈,并针对关键技术进行了物化法和生化法的试验研究。(1)工程案例:采用了絮凝气浮+深层过滤+钠离子交换+电渗析为主体的工艺流程。主要的出水指标COD、NH4+-N、SS、油类的去除是在絮凝气浮工段,去除率分别为70.9%、87.3%、86.7%、90.6%。硬度的降低主要是在钠离子交换机工段,钠离子交换机工段的进水硬度为51.2mg/L,出水硬度为5.3mg/L,该工段对硬度的去除率达到89.6%。电渗析工段进水电导率为820μs/cm,出水电导率为206μs/cm,该工段对电导率的去除率达到了74.8%。回用水硬度小于60mg/L、电导率小于500μs/cm、COD≤30mg/L,可以满足喷水织造用水要求。(2)工程案例经济性分析表明:该废水处理及回用工程日回用水量为1820m3左右,每年可以节约水费269.04万元,财务净现值为342.3万元,财务内部回收率为23.14%,静态回收期为6.23年。由此可见,该中水回用工程不仅具有良好的环保效益,而且具有良好的经济效益。(3)聚丙烯酸酯浆料废水的物化法和生化法的对比研究:聚丙烯酸酯浆料的有效治理已成为岜山织造公司现有的废水处理及回用工程的关键技术之一,本论文探索了喷水织造的准备过程中产生的上浆废水的处理方法,考察了絮凝法、次氯酸钠法、厌氧生物法对浆料废水的处理效果,相应的COD去除率分别为11.7%、10.4%、30%,显然厌氧生物法效果更好。(4)高效厌氧反应器处理聚丙烯酸酯浆料废水的运行研究:SSSAB反应器在HRT为3d、温度为25℃,进水p H为7.5~8.2的条件下,两个月后启动完成,螺旋对称流厌氧反应器对稀释后浆料废水的COD去除率达到58%,从而验证了厌氧生物法处理浆料废水的可行性。
[Abstract]:As one of the most widely used weaving equipments in China's textile industry, water jet loom has the advantages of high output, good quality and low weaving cost, but it consumes a large amount of fresh water. Up to now, China has 355,000 water jet looms. The annual water consumption reaches 450 million tons. Because grease and slurry are used in weaving process, CODSS in effluent is higher. If water spraying wastewater can not be treated effectively and recycled, Will lead to huge water pollution and waste of resources. As water resources become increasingly tight and local water quality standards become more stringent, The effective treatment and reuse of waste water in textile industry is of vital importance to the survival and development of enterprises. Therefore, it is imperative to treat water jet weaving wastewater and reuse reclaimed water. This paper analyzes in detail the existing water jet weaving of Bashan weaving company with a scale of 3000m / 3 / d. Wastewater treatment and reuse works, On the basis of the economic analysis of the project case, the key technical bottleneck of the project case is put forward. A case study of physicochemical method and biochemical method was carried out: the main process of flocculation and air floatation deep filtration sodium ion exchange electrodialysis was adopted. The main effluent index was CODN _ 4-NSS _ 4, oil. The removal is in the flocculating air floatation section, The removal rates were 70.9% 87.3% and 86.7%, respectively. The reduction of hardness was mainly in the sodium ion exchange machine section. The hardness of influent is 51.2 mg / L, the hardness of effluent is 5.3 mg / L, the removal rate of hardness is 89.6 渭 s / L, the conductivity of influent is 820 渭 s / cm, the conductivity of effluent is 206 渭 s / cm, the removal rate of conductivity is 74.8%. Water hardness less than 60 mg / L, conductivity less than 500 渭 s / cm ~ (-1) COD 鈮，

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