DMTO碱洗废水的碱回收技术
A New Technology for Recovering Alkali from DMTO Alkali-Washing Wastewater
程会军 1陈梦帆2
作者信息
- 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
- 折叠
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Na2CO3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Na2CO3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.
Abstract
A new recovery technology based on special membrane module was proposed to recover Na2CO3 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 Na2CO3 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Key words
DMTO alkali-washing wastewater/special membrane module/two-stage alkali-recovery technology/sodium carbonate引用本文复制引用
出版年
2024
NETL
NSTL
万方数据