化工环保2025，Vol.45Issue(5)：636-643,8.DOI:10.3969/j.issn.1006-1878.2025.05.006
介质微通道强化煤化工废水油固协同分离
Enhanced oil-solid synergistic separation of coal chemical wastewater by medium microchannel
摘要
Abstract
To address the challenge of synergistic oil-solid separation in coal chemical wastewater,a novel separation mechanism based on oil droplet self-rotational vortex enhancement was proposed.By integrating wettability gradient control with swirl-enhanced regeneration technology,new microchannel separation equipment was developed.The effectiveness of this equipment in removing suspended solids and petroleum pollutants from coal chemical wastewater was systematically investigated.Within the confined microchannel space,the asymmetric shear flow field induced a strong vortex flow of oil droplets,forming a"dynamic micro-interface".This interface simultaneously promoted the migration and enrichment of suspended particles and enhanced the mass transfer of dissolved pollutants through a"sweep-enrichment-mass transfer"process.The separation device featured a two-zone configuration and a three-phase hydrocyclone medium regeneration system.In the preliminary separation zone,larger suspended solids were effectively intercepted,while the deep separation zone employed hydrophilic/lipophilic media to establish a wettability gradient.This gradient facilitated the coalescence of oil droplets,resulting in the synergistic removal of polymorphic pollutants.The medium regeneration system allowed for efficient in-situ regeneration of the separation medium.Field experimental results show that under optimal operating conditions,with a bed thickness of 3.0 m and a filtration rate of 25 m/h,the suspended solids content in coal chemical wastewater is reduced from(22.9±2.9)mg/L to(4.1±2.0)mg/L after treatment with the microchannel separation device,achieving an average separation efficiency of over 80.0%.Furthermore,petroleum content is reduced from(88.2±18.1)mg/L to(20.5±5.9)mg/L,with an average separation efficiency of 78.3%,indicating both effective treatment and operational stability.关键词
煤化工废水/污染物/微通道分离/装备设计Key words
coal chemical wastewater/contaminant/microchannel separation/equipment design分类
化学工程引用本文复制引用
韦奇,林朝毅,郑重,白锦浩,吕文杰,汪华林..介质微通道强化煤化工废水油固协同分离[J].化工环保,2025,45(5):636-643,8.基金项目
国家自然科学基金优青项目(52322003) （52322003）
上海市优秀学术/技术带头人计划项目(23XD1431900). （23XD1431900）
