CAJ | 학술논문

炼油厂污水经A2/O为核心的生化系统处理后，水质可达到污水综合排放标准。有效利用炼油厂低温余热，通过负压多效蒸发工艺实现净化后污水的回收再利用，是炼油厂节能减排的新举措。进水水质中硅、浊度是蒸发工艺防垢、控制水质的主要参数，以硅、浊度的同步去除为目标，研究了石灰、镁盐沉淀、铁铝盐共沉淀法对硅和浊度去除效果的影响。结果表明，当Ca （OH ）2的投加量为500 m g/L时，硅、浊度的同步去除率分别为79．2％和4．2％；p H值＝10．0，Mg Cl2投加量为400 mg/L时，硅、浊度的同步去除率分别为91．6％和74．4％；优选的Fe（Ⅱ/Ⅲ）Al复合混凝剂投加量为400 mg/L时，硅、浊度的同步去除率分别为91．9％和90．4％。Fe（Ⅱ/Ⅲ）Al复合混凝剂作用效果满足蒸发系统对进水硅和浊度的控制要求，处理后硅含量为17．93 m g/L ，浊度为3 NTU。
련유엄오수경A2/O위핵심적생화계통처리후，수질가체도오수종합배방표준。유효이용련유엄저온여열，통과부압다효증발공예실현정화후오수적회수재이용，시련유엄절능감배적신거조。진수수질중규、탁도시증발공예방구、공제수질적주요삼수，이규、탁도적동보거제위목표，연구료석회、미염침정、철려염공침정법대규화탁도거제효과적영향。결과표명，당Ca （OH ）2적투가량위500 m g/L시，규、탁도적동보거제솔분별위79．2％화4．2％；p H치＝10．0，Mg Cl2투가량위400 mg/L시，규、탁도적동보거제솔분별위91．6％화74．4％；우선적Fe（Ⅱ/Ⅲ）Al복합혼응제투가량위400 mg/L시，규、탁도적동보거제솔분별위91．9％화90．4％。Fe（Ⅱ/Ⅲ）Al복합혼응제작용효과만족증발계통대진수규화탁도적공제요구，처리후규함량위17．93 m g/L ，탁도위3 NTU。
The oil refinery effluent was dealt with biochemical treatment taking A 2/O as a core ,and its quality could reach the comprehensive discharge standard of effluent .The effluent could be recycled by the low pressure multi-effect evaporation system using the low temperature heat of oil refinery ,and it was the new measure of energy saving and emission reduction .The sil-icon and turbidity were the main parameters of evaporation process .The removal effect of silicon and turbidity by softening with lime ,magnesium salt precipitation and precipitation by combina-tion coagulant of molysite and aluminium salt were researched .The results indicated that :when the dosage of Ca(OH)2 was 500 mg/L ,the removal rate of silicon and turbidity were 79 .2% and 4 .2% ,respectively ,and when the dosage of MgCl2 was 400 mg/L at the pH value of 10 ,the re-moval rate of silicon and turbidity were 91 .6% and 74 .4% ,respectively .The requirement of low temperature multi-effect evaporation system could be achieved ,w hen the dosage of Fe(Ⅱ/Ⅲ)Al combination coagulant was 400 mg/L and the removal rate of silicon and turbidity were 91 .9%and 90 .4% ,respectively . The residual silicon content and turbidity were 17 .93 mg/L and 3 NTU .