焦化脱硫废液提盐工程实例  

An engineering case of salt extraction from coking desulfurization waste liquid

作　　者：张亚峰[1,2] 刘硕 裴振[1,2] 安路阳[1,2] 尹健博 孙呈祥[1,2] 刘睿 张宗友 Zhang Yafeng;Liu Shuo;Pei Zhen;An Luyang;Yin Jianbo;Sun Chengxiang;Liu Rui;Zhang Zongyou(Sinosteel Anshan Research Institute of Thermo-Energy Co.,Ltd.,Anshan 114044,China;Liaoning Provincial Engineering Research Center for Steel and Iron Industry Wastewater Advanced Treatment Technology,Anshan 114044,China)

机构地区：[1]中钢集团鞍山热能研究院有限公司,辽宁鞍山114044 [2]辽宁省钢铁行业废水深度处理技术工程研究中心,辽宁鞍山114044

出　　处：《工业水处理》2021年第1期136-141,共6页Industrial Water Treatment

基　　金：辽宁省自然科学基金指导计划项目(2019-ZD-0894)。

摘　　要：针对某焦化企业规模为30 m^3/d脱硫废液的处理,采用创新性工艺“催化氧化—脱色—蒸发浓缩—分步结晶与离心分离”提取一级品NH4SCN及合格品(NH4)2SO4产品,总结工艺运行过程中存在生产连贯性低、粉末活性炭难回用、产率及质量不高、管道设备堵塞腐蚀等问题,并提出蒸汽机械再压缩技术(MVR)代替蒸发浓缩、改用颗粒状活性炭、分步结晶法联合醇析法、合理设计管路、增设管辅设施、选择耐腐材质等优化措施,运行费用分析表明年增加纯收益557万元。Aiming at a 30 m^3/d desulfurization waste liquid from a coking enterprise,an innovative process‘catalytic oxidation-decolorization-evaporative concentration-fractional crystallization and centrifugal separation’was utilized to extract products of first-grade NH4SCN and qualified-grade(NH4)2SO4.Existing problems in operation of the process were summarized,including low production continuity,powder activated carbon difficult to recycle,low product yield and its quality,blockage and corrosion in pipes and equipment.Optimization measures such as replacing evaporative concentration with MVR,using granular activated carbon,combing fractional crystallization with alcohol extraction,designing pipes reasonably,adding auxiliary piping facilities and selecting corrosion-resistant materials were proposed accordingly.Analysis on the operating costs of the process showed an annual increase of 5.57 million yuan in net income.

关 键 词：焦化 脱硫废液 提盐 资源化 

分 类 号：X703.1[环境科学与工程—环境工程]