集成膜工艺处理碱减量废水及处理水回用对涤纶减量影响的研究
本文关键词:集成膜工艺处理碱减量废水及处理水回用对涤纶减量影响的研究 出处:《浙江工商大学》2015年硕士论文 论文类型:学位论文
更多相关文章: 集成膜工艺 碱减量废水 酸析 对苯二甲酸 乙二醇 涤纶 减量率
【摘要】:本文采用超滤-纳滤集成膜工艺对碱减量废水进行实验研究,并对滤膜进行水力反冲洗和氢氧化钠-十二烷基磺酸钠化学清洗实验。结果表明:在0.1 Mpa压力下,超滤膜对废水的COD去除率和浊度去除率分别在30%和98%以上,膜通量稳定后基本保持在30 L.m-2.h-1以上。在0.8 Mpa压力下,纳滤膜对废水的COD去除率和浊度去除率分别在85%和15%左右,膜通量稳定后保持在15 L·m-2·h-1以上。水力反冲洗对两种膜的清洗效果都不理想,膜的纯水通量恢复在初始通量的85%以下,而氢氧化钠-十二烷基磺酸钠清洗可使膜的纯水通量恢复到初始通量的90%以上,具有较好的清洗效果。对纳滤后得到的浓缩液进行酸析实验并与直接酸析法比较,结果表明:经纳滤膜处理后废水被浓缩减量,可减少酸析过程中的加酸量。与直接酸析法相比,纳滤浓缩液经酸析过滤后过滤液中的COD去除率较高,在80%以上,表明纳滤浓缩液中具有较高的对苯二甲酸钠(TADS)浓度。经膜处理酸析后回收的对苯二甲酸(TA)样品,灰分为630 ppm,酸值为641.5 mg(KOH)/g,透过率为89.6%,与直接酸析法回收的TA样品相比,质量上有了很大的提高。对纳滤膜透过液回用至减量工艺可能对涤纶减量过程造成的影响进行分析,主要为乙二醇(EG)含量的积累增加对涤纶减量过程的影响。结果表明:EG含量的增加可促进涤纶减量。在最优减量条件下,当减量过程中的EG达到一定含量时,可通过缩短减量时间以达到相同的减量效果。涤纶减量率还随碱度、温度、时间的增加而增大。碱度对减量率的影响最大,碱度的增加会使减量率大幅度上升。不同材质的涤纶织物在相同的条件下减量率也有所不同。
[Abstract]:In this paper, ultrafiltration nanofiltration integrated membrane process is applied to study alkali decrement wastewater. Water backwash and sodium hydroxide twelve alkyl sulfonate sodium chemical cleaning experiment are performed. The results showed that under the pressure of 0.1 Mpa, the removal rate and turbidity removal rate of ultrafiltration membrane were 30% and 98%, respectively, and the membrane flux remained basically above 30 L.m-2.h-1 after stable membrane flux. Under the pressure of 0.8 Mpa, the COD removal rate and turbidity removal rate of nanofiltration membrane were about 85% and 15% respectively, and the membrane flux remained above 15 L. M-2. H-1 after the membrane flux was stable. The effect of hydraulic backwashing on the two membranes is not ideal. The pure water flux of membrane is recovered below 85% of the initial flux, while sodium hydroxide twelve alkyl sulfonate cleaning can make the membrane pure water flux recover to more than 90% of the initial flux, which has good cleaning effect. Acid analysis experiment of concentrated liquid obtained after nanofiltration and compared, and the analysis results show that the direct acid wastewater was treated by nanofiltration membrane after concentration reduction, can reduce the acid in the process of adding acid. Compared with the direct acid leaching method, the COD removal rate of the nanofiltration concentrate after filtration by acid digestion is higher than 80%, indicating that the concentration of sodium terephthalate (TADS) is higher in nanofiltration concentrate. The terephthalic acid (TA) sample recovered after membrane treatment and acid digestion has a ash content of 630 ppm, an acid value of 641.5 Mg (KOH) /g and a transmittance of 89.6%. Compared with the TA sample recovered by direct acidolysis, the quality of the sample has been greatly improved. The influence of nanofiltration membrane permeation to reduction process on polyester fiber reduction process is analyzed, which is mainly due to the accumulation of ethylene glycol (EG) and its influence on polyester fiber reduction process. The results show that the increase of EG content can promote the reduction of polyester. Under the optimal reduction conditions, when the EG in the reduction process reaches a certain content, the reduction time can be shortened to achieve the same reduction effect. The Dacron reduction rate also increases with the increase of alkalinity, temperature and time. The alkalinity has the greatest influence on the reduction rate, and the increase of alkalinity will greatly increase the reduction rate. The reduction rate of polyester fabric with different materials is different under the same condition.
【学位授予单位】:浙江工商大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TQ028.8;X791
【相似文献】
中国期刊全文数据库 前10条
1 李碧;;酸析-气浮-生化法处理高浓度印刷油墨废水[J];中国环保产业;2006年10期
2 吴文珍;景有海;;酸析及混凝法处理切削废水研究[J];能源与环境;2013年02期
3 ;盐酸酸析法生产腐植酸铵[J];化学通报;1975年03期
4 管秀琼,罗惠波,陈学连;酸析——混凝处理硫酸盐竹浆黑液[J];四川轻化工学院学报;2004年02期
5 李海红;;正交试验法优选对苯二甲酸回收条件[J];河北工程大学学报(自然科学版);2008年02期
6 雷寤初 ;李彦春;;碱法草浆蒸煮废液的厌氧-酸析处理研究(下)[J];建筑技术通讯(给水排水);1992年05期
7 李芙蓉;文金丽;缪礼鸿;;酸析木素法处理棉浆黑液的工艺研究[J];武汉工业学院学报;2007年03期
8 唐璐;舒晓春;;酸析+臭氧+MBR工艺处理手机显示屏厂废水[J];环境科学与技术;2011年S1期
9 ;甲苯氧化岐化法生产涤纶树脂[J];辽宁化工;1978年05期
10 孙淑明;石坤;铁淑英;;药用腐植酸提纯工艺的研究[J];中国药学杂志;1987年05期
中国重要报纸全文数据库 前1条
1 本报记者 张虎;增强蜡染行业环保优势[N];中国纺织报;2008年
中国博士学位论文全文数据库 前2条
1 刘超男;碱减量废水的处理研究[D];东华大学;2005年
2 高阳俊;海岛型超细复合纤维开纤剥离废水资源化技术研究[D];东华大学;2006年
中国硕士学位论文全文数据库 前3条
1 周慧婷;集成膜工艺处理碱减量废水及处理水回用对涤纶减量影响的研究[D];浙江工商大学;2015年
2 吕庭君;竹浆废水酸析处理效果及酸析固废农用处理初步研究[D];浙江大学;2007年
3 邱瑞芳;海岛型超细复合纤维开纤剥离废水资源化技术研究[D];东华大学;2007年
,本文编号:1344862
本文链接:https://www.wllwen.com/kejilunwen/huanjinggongchenglunwen/1344862.html