常减压装置电脱盐污水治理的工艺改造与优化  

PROCESS TRANSFORMATION AND OPTIMIZATION OF ELECTRIC DESALTING WASTEWATER TREATMENT IN ATMOSPHERIC AND VACUUM DISTILLATION UNIT

作　　者：吴建荣[1] 王英魁[1] 杨康东 Wu Jianrong;Wang Yingkui;Yang Kangdong(Petro-China Dushanzi Petrochemical Company,Dushanzi,Xinjiang,833699)

机构地区：[1]中国石油天然气股份有限公司独山子石化分公司,新疆独山子833699

出　　处：《石油化工安全环保技术》2024年第2期47-52,I0003,共7页Petrochemical Safety and Environmental Protection Technology

摘　　要：针对常减压装置电脱盐污水中H2S和可燃气体含量高、水质因含油含渣的影响不能稳定达标的突出问题。采用常压闪蒸和高效旋流溶气气浮(CDFU)相结合技术路线配套原有重力沉降除油技术工艺,有效解决电脱盐污水中高含油含渣、可燃气和硫化氢含量较高的问题,改造后石油类降低73.6%,COD(化学需氧量)降低32.7%,H2S、可燃气体和VOCS体积浓度分别下降56.85%、57.93%和38.25%。电脱盐污水水质明显改善,减少对下游污水系统的影响,消除安全隐患。Aiming at the obvious problems of high H2S and combustible gas content in the electric desalting wastewater of the atmospheric and vacuum distillation units and the unstable water quality that cannot meet the standard due to the influence of oil and slug content,this paper adopts the combination of atmospheric flash evaporation and high-efficiency cyclone dissolved gas flotation(CDFU)technology routes to match the original gravity sedimentation oil-removal technology process.This effectively solves the problems of high oil content and slag content,combustible gas and hydrogen sulfide in the electric desalination wastewater.After the transformation,the petroleum content is reduced by 73.6%;COD(chemical oxygen demand)is reduced by 32.7%and the volume concentrations of H2S,combustible gas,and VOCS are reduced by 56.85%,57.93%,and 38.25%respectively.The water quality of the electric desalting wastewater has been improved significantly,which reduces the impact on the downstream wastewater system and eliminates safety hazards.

关 键 词：电脱盐污水 旋流溶气气浮 悬浮物 闪蒸 

分 类 号：X703[环境科学与工程—环境工程]