丁辛醇缩合废水的处理工艺  

Treatment technology of butyl alcohol and 2-ethyl hexanol condensation sewage

作　　者：项军 张平 李治水 聂增来 唐娜 XIANG Jun;ZHANG Ping;LI Zhishui;NIE Zenglai;TANG Na(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;Tianjin Bohua Yongli Chemical Co.,Ltd.,Tianjin 300460,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]天津渤化永利化工股份有限公司,天津300460

出　　处：《化工进展》2021年第2期1097-1105,共9页Chemical Industry and Engineering Progress

基　　金：教育部科研创新团队培育计划(IRT-17R81);天津市高等学校创新团队培养计划(TD13-5008)。

摘　　要：丁辛醇在缩合生产过程中会产生大量气味重、化学需氧量(COD)高、碱性强、盐度高且可生化性差的工业废水,其中COD浓度高达80g/L。本文提出了一种处理丁辛醇缩合废水的新工艺,即"酸化-隔油"预处理-非均相臭氧催化氧化处理-碟管式反渗透(DTRO)膜组处理深度处理。本文在非均相臭氧催化氧化处理过程中重点研究了催化剂种类、pH和反应时间对处理效果的影响规律;在DTRO处理过程中探究了操作压力对产水水质的COD和TDS的影响。实验结果表明:丁辛醇缩合废水在pH≤3的条件下进行"酸化-隔油"预处理,之后将"酸化-隔油"后的废水pH调节至7,再进行非均相臭氧催化氧化120min,其中每100g废水中需添加4号商业催化剂20g,最后DTRO膜组在7MPa的操作压力下对氧化后的废水进行深度处理。经检验,膜组出水的COD去除率达到99.6%以上。A great deal of sewage with heavy odor,high COD,strong alkalinity,high salinity and poor biodegradability will be produced during the condensation production of butyl alcohol and 2-ethyl hexanol,in which the COD concentration is up to 80g/L.A new process for treating butyl alcohol and 2-ethyl hexanol condensation sewage was presented in this paper,that is,“acidification-oil trap”pretreatment-heterogeneous ozone-catalyzed oxidation treatment-disc-tube reverse osmosis(DTRO)membrane treatment further treatment.The effects of catalyst type,pH and reaction time on the treatment were investigated.Then the influence of operating pressure on COD and TDS of treated water quality was investigated in the process DTRO membrane process.It showed that the butyl alcohol and 2-ethyl hexanol condensation sewage pretreated with acidification and oil isolation at pH≤3,then the sewage was adjusted to pH 7.After that,it carried out by heterogeneous ozone-catalyzed oxidation for 120min,finally the operating pressure of DTRO membrane treated the oxidized sewage under of 7MPa.According to the test,the COD removal rate of butyl alcohol and 2-ethyl hexanol condensation sewage could reach 99.6%.

关 键 词：丁辛醇缩合废水 酸化 非均相臭氧催化氧化 碟管式反渗适膜组 COD去除率 

分 类 号：X703[环境科学与工程—环境工程]