PVC离心母液水膜法过滤回收利用工艺研究  

Study on recycling technology of PVC centrifugal mother liquor by water membrane filtration

作　　者：赵凤辉 ZHAO Feng-hui(Qinghai Salt Lake Haina Chemical Co.,Ltd.,Xining 811600,China)

机构地区：[1]青海盐湖海纳化工有限公司,青海西宁811600

出　　处：《化学工程师》2024年第10期78-81,共4页Chemical Engineer

摘　　要：目的探究膜法过滤技术在氯碱厂PVC离心母液水回收利用工艺中的应用,提高PVC离心母液水的回收利用率,降低悬浮物和化学需氧量。方法对PVC离心母液水进行预处理,去除其中杂质和悬浮物,将预处理后的母液水通过真空泵从膜组件的进料口输入,利用超滤膜过滤系统对其进行过滤,并对过滤后的透过液进行后处理。对后处理的溶液进行水质检测,并统计检测结果。结果利用膜法过滤技术对PVC离心母液水进行过滤后,PVC离心母液水的pH值为7.1~7.2,符合工业用水标准,悬浮物为1.10mg·L^(-1),COD为45.23mg·L^(-1),氯化物为41.23mg·L^(-1),硫酸盐为45.15mg·L^(-1),HCl为0.12mg·L^(-1),电导率为500μS·cm^(-1),浊度为1.5NTU。结论膜法过滤技术在氯碱厂PVC离心母液水回收利用中应用性能较好,有效提升了氯碱厂PVC离心母液水回收利用的效果。OBJECTIVE To explore the application of membrane filtration technology in the recycling process of PVC centrifugal mother liquor water in chlor-alkali plant,so as to improve the recycling rate of PVC centrifugal mother liquor water and reduce suspended solids and chemical oxygen demand.METHODS The PVC centrifugal mother liquor water was pretreated to remove impurities and suspended solids,and the pretreated mother liquor water was fed from the feed port of the membrane module through a vacuum pump,and the ultrafiltration membrane filtration system was used to filter it,and the filtered permeate was post-treated.The water quality of the post-treated solution was tested,and the test results were statistically calculated.RESULTS The results showed that the pH value of PVC centrifugal mother liquor water was 7.1~7.2,which met the industrial water standard,and the suspended solids were 1.10mg·L^(-1),the chemical oxygen demand was 45.23mg·L^(-1),the chloride was 41.23mg·L^(-1),the sulfate was 45.15mg·L^(-1),the hydrogen chloride was 0.12mg·L^(-1),the conductivity was 500μS·cm^(-1),and the turbidity was 1.5NTU.CONCLUSION The membrane filtration technology has good application performance in the recycling of PVC centrifugal mother liquor water in chlor-alkali plant,which effectively improves the effect of PVC centrifugal mother liquor water recycling in chlor-alkali plant.

关 键 词：氯碱厂 PVC 离心母液水 膜法过滤 回收利用 利用工艺 

分 类 号：X703.1[环境科学与工程—环境工程]