DMTO碱洗废水的碱回收技术  

A New Technology for Recovering Alkali from DMTO Alkali-Washing Wastewater

作　　者：程会军 陈梦帆 CHENG Huijun;CHEN Mengfan

机构地区：[1]中煤鄂尔多斯能源化工有限公司,内蒙古鄂尔多斯017317 [2]上海凯鑫分离技术股份有限公司,上海200136

出　　处：《化工设计通讯》2024年第5期1-3,共3页Chemical Engineering Design Communications

摘　　要：提出一种以特种膜组件为核心的碱回收技术,用以回收DMTO碱洗废水中的Na_(2)CO_(3)和NaOH。以内蒙古某甲醇制烯烃企业为例,通过中试装置探究并验证了碱回收效果。研究结果表明,气浮与陶瓷膜的预处理组合工艺对水中油状物去除率达到99.8%,有效保障碱回收膜组件的稳定运行。通过两级碱回收技术,每吨废水可回收获得19.12 kg的Na_(2)CO_(3)和1.77 kg的NaOH,碱回收率达到73.4%。本技术可实现废碱的循环利用,为企业节省大量药剂费用,创造良好的经济效益。A new recovery technology based on special membrane module was proposed to recover Na_(2)CO_(3) and NaOH from DMTO alkali-washing wastewater in this paper.Recovery effect was studied and verified via pilot-scale devices by choosing a DMTO enterprise in Inner Mongolia as example.The results showed that the pre-treatment process,combined of air flotation and ceramic membrane,could remove 99.8%of oil in water,which effectively guarantee the stable operation of alkali-recovery membrane module.Recovery rate of alkali was calculated as 73.4%,and 19.12 kg Na_(2)CO_(3) and 1.77 kg NaOH could be recovered from per ton of wastewater through the two-stage alkali-recovery technology.The recycling of waste alkali via this technology would create considerable benefits for enterprise by saving large amounts of pharmaceutical costs.

关 键 词：DMTO碱洗废水 特种膜组件 两级碱回收 碳酸钠溶液 

分 类 号：X703.1[环境科学与工程—环境工程]