分段递进式除硫工艺对油井采出含硫废水的处理研究  

Research on the treatment of sulfide-containing wastewater from oilwell production using segmented progressive sulfide removal process

作　　者：刘怀珠[1] 于慧艳[2] 胡彬彬 赵亮[1] 赵康宁[1] 朱广斌 吴新世[3] LIU Huaizhu;YU Huiyan;HU Binbin;ZHAO Liang;ZHAO Kangning;ZHU Guangbin;WU Xinshi(Tangshan Jiyou Ruifeng Chemical Limited Company,Jidong Oilfield,PetroChina,Tangshan 063200,China;PetroChina Jidong Oilfield Branch Development Technology Co.,Ltd.,Tangshan 063200,China;School of Chemistry and Chemical Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]中国石油冀东油田唐山冀油瑞丰化工有限公司,河北唐山063200 [2]中国石油冀东油田分公司开发技术公司,河北唐山063200 [3]天津理工大学化学化工学院,天津300384

出　　处：《工业水处理》2024年第7期171-178,共8页Industrial Water Treatment

基　　金：高校产学研联合创新项目(JDYT-rfhg-2022-JS-1872)。

摘　　要：针对油井采出废水中硫化物去除难的问题,采用分段递进式除硫工艺对油井采出废水经过UASB生物反应池和仿生池进行分段递进式回流处理。实验结果表明,采用分段递进式除硫工艺,调节采出废水中S/N为5.2∶2,补充一定量的HCO_(3)^(-),设置回流比为2.7∶1条件下,采出废水中的硫化物(S_(2)^(-))去除率为95.8%,最大容积载荷6.46 kg/(m^(3)·d);硝酸盐(NO_(3)^(-)-N)去除率达99.6%,最大容积载荷1.13 kg/(m^(3)·d)。经SEM和XRD验证,硫代谢产物以单质硫(S0)为主,回收率83.8%,其次为SO_(4)^(2−)和S_(2)O_(3)^(2-);硝酸盐代谢产物以N_(2)为主,产率72.4%,其次为NO_(2)^(-)。分段递进式除硫工艺不仅解决了采出废水中的硫化物去除难题,同时实现了资源回收(S0)和主要代谢终产物(如N2)的无污染排放。In response to the challenge of sulfide removal from oilwell produced wastewater,a segmented progressive sulfide removal process was adopted to treat the oilwell produced wastewater through UASB bioreactor and biomimetic reactor for segmented progressive reflux treatment.The experimental results showed that under the conditions of adopting the segmented progressive sulfide removal process,adjusting the S/N ratio of 5.2∶2 in the produced wastewater,supplementing a certain amount of HCO_(3)^(-),and setting the reflux ratio of 2.7∶1,the removal efficiency of sulfide(S_(2)^(-))in the produced wastewater arrived to 95.8%,and the maximum sulfide volumetric load was 6.46 kg/(m^(3)·d).The removal efficiency of nitrate(NO_(3)^(-)-N)reached 99.6%,with the maximum nitrate volumetric load of 1.13 kg/(m^(3)·d).The key metabolite of sulfide metabolism was elemental sulfur,with a recovery rate of 83.8%,which was verified by SEM and XRD simultaneously,and followed by SO_(4)^(2−)and S_(2)O_(3)^(2-).While the key metabolite of nitrate metabolism was N_(2),with a yield of 72.4%,and followed by NO_(2)^(-).The new process not only solved the problem of efficient removal of sulfide and nitrate from the produced wastewater,but also realized resource recovery(S0)and non-pollution emission of metabolic end products(such as N2).

关 键 词：油井采出废水 硫化物 分段递进式除硫工艺 容积载荷 单质硫回收 

分 类 号：X703[环境科学与工程—环境工程]