化工进展
化工進展
화공진전
Chemical Industry and Engineering Progress
2015年
12期
4407-4414
,共8页
王璟%毛进%赵剑强%蒲平%郭维忠%李亚娟%刘亚鹏
王璟%毛進%趙劍彊%蒲平%郭維忠%李亞娟%劉亞鵬
왕경%모진%조검강%포평%곽유충%리아연%류아붕
废水%蒸发%二氧化硅%稠油%电站锅炉%曝气生物滤池%反渗透%运行费用
廢水%蒸髮%二氧化硅%稠油%電站鍋爐%曝氣生物濾池%反滲透%運行費用
폐수%증발%이양화규%주유%전참과로%폭기생물려지%반삼투%운행비용
wastewater%evaporation%silica%heavy oil%power plant boiler%biological aerated filter%reverse osmosis%operating cost
常规稠油热采废水处理采用除油软化工艺,出水水质较低,仅能用于直流小注汽锅炉补水.由于小注汽锅炉参数低,排污量大,能耗高,造成采油蒸汽成本高.针对该问题,开发了预处理-蒸发-生物处理-膜处理-混床工艺处理稠油热采废水,并通过实验对工艺各子系统运行性能进行研究以提高处理效果,使系统处理出水可用于电站高参数锅炉补给水,达到以热电联产机组取代小注汽锅炉,降低采油蒸汽费用的目的.研究结果表明,采用该工艺对稠油热采废水进行处理,各子系统运行稳定;废水经除硅软化预处理及蒸发后,产水TOC平均约22mg/L;曝气生物滤池产水TOC平均约6mg/L;再经超滤-反渗透处理后产水TOC含量小于0.15mg/L;继续经混床处理,最终出水电导率≤0.15μS/cm、二氧化硅≤10μg/L、TOC≤200μg/L,满足电站高参数锅炉补水水质要求,每吨水直接运行费用为8.05元.
常規稠油熱採廢水處理採用除油軟化工藝,齣水水質較低,僅能用于直流小註汽鍋爐補水.由于小註汽鍋爐參數低,排汙量大,能耗高,造成採油蒸汽成本高.針對該問題,開髮瞭預處理-蒸髮-生物處理-膜處理-混床工藝處理稠油熱採廢水,併通過實驗對工藝各子繫統運行性能進行研究以提高處理效果,使繫統處理齣水可用于電站高參數鍋爐補給水,達到以熱電聯產機組取代小註汽鍋爐,降低採油蒸汽費用的目的.研究結果錶明,採用該工藝對稠油熱採廢水進行處理,各子繫統運行穩定;廢水經除硅軟化預處理及蒸髮後,產水TOC平均約22mg/L;曝氣生物濾池產水TOC平均約6mg/L;再經超濾-反滲透處理後產水TOC含量小于0.15mg/L;繼續經混床處理,最終齣水電導率≤0.15μS/cm、二氧化硅≤10μg/L、TOC≤200μg/L,滿足電站高參數鍋爐補水水質要求,每噸水直接運行費用為8.05元.
상규주유열채폐수처리채용제유연화공예,출수수질교저,부능용우직류소주기과로보수.유우소주기과로삼수저,배오량대,능모고,조성채유증기성본고.침대해문제,개발료예처리-증발-생물처리-막처리-혼상공예처리주유열채폐수,병통과실험대공예각자계통운행성능진행연구이제고처리효과,사계통처리출수가용우전참고삼수과로보급수,체도이열전련산궤조취대소주기과로,강저채유증기비용적목적.연구결과표명,채용해공예대주유열채폐수진행처리,각자계통운행은정;폐수경제규연화예처리급증발후,산수TOC평균약22mg/L;폭기생물려지산수TOC평균약6mg/L;재경초려-반삼투처리후산수TOC함량소우0.15mg/L;계속경혼상처리,최종출수전도솔≤0.15μS/cm、이양화규≤10μg/L、TOC≤200μg/L,만족전참고삼수과로보수수질요구,매둔수직접운행비용위8.05원.
The traditional heavy oil thermal recovery wastewater treatment process is comprised of oil eliminating and softening. The effluent quality is comparably poor which can only be used as make up water for once-through small steam injection boiler. Because the parameter of small steam injection boiler is low,both the boiler blowdown and energy consumption are high. The oil extraction steam cost is raised subsequently. Aimed at the problem,a novel heavy oil thermal recovery wastewater treatment process that comprises of pretreatment,bio-treatment,membrane,and mixed bed technology was developed. Operating performance of individual sub-system was investigated by model experiments to enhance the treatment efficiency and to make it possible to reuse the product water as high parameter power plant unit make up water. As a result,the objective to replace the small steam injection boiler by combined heat and power generation unit to reduce the oil extraction steam fee could be achieved. Results show that the operating performance of all sub-system is stable when theheavy oil thermal recovery wastewater was treated by the new process. The average TOC was about 22mg/L when the wastewater was treated by the silica removal and softening pretreatment system and the evaporator. The TOC was decreased to about 6mg/L in the BAF effluent,and it was continued to decrease to about 0.15mg/L in the UF-RO effluent. The conductivity,silica and TOC of the final product water were less than 0.15μS/cm,10μg/L and 200μg/L respectively when the UF-RO effluent was treated by mixed bed ion exchanger subsequently. This water quality could meet the demand of high parameter power plant boiler and the direct operating cost is 8.05yuan/ton of product water.