含硫污水曝气除硫工艺效果分析及防腐对策  

Effect Analysis of Aeration Desulfurization Process of Sulfur-containing Wastewater and Prevention Measures to Its Corrosion

作　　者：李景全[1] 安云飞[2] 郑亚妮[1] 颜珩烨[1] 代吉建[1] 

机构地区：[1]河南油田分公司第一采油厂,河南桐柏474780 [2]西安石油大学化学化工学院,陕西西安710065

出　　处：《西安石油大学学报（自然科学版）》2016年第2期99-104,111,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中石化河南油田局级科研项目"双下联合站注水水质处理效率提升技术研究"(编号:2015-037)

摘　　要：河南油田双河联合站采用曝气除硫工艺,但该工艺后续设备腐蚀现象严重。为了进行工艺优化,研究了脱硫塔曝气的气液比以及曝气前后SRB和硫形态的变化,利用动态失重法比较了脱硫塔前后污水的腐蚀性,并通过XRD/SEM/EDS对腐蚀产物加以分析。结果表明:曝气除硫的气液比调整为0.5效果最佳。在气液比为0.6时,曝气50 min对SRB有一定的抑制效果。脱硫塔曝气后其出口的腐蚀速率较进口减小一半,但出口由残余氧引起的腐蚀性仍较强,将脱硫塔出口至注水罐之间的钢管线更换为玻璃钢管线,收到了良好的防腐效果。曝气除硫后含有S8的悬浊液进入注水罐,S8和CO2协同效应引起的腐蚀速率高达1.33mm/a,建议在注水罐进口安装过滤装置或对注水罐进行防腐涂层处理。To optimize the aeration desulfurization technology of sulfur-containing wastewater in Shuanghe union station of Henan Oilfield,the influence of gas-liquid ratio on the aeration desulfurization effect and the influence of the aeration process on the SRB and the sulfur speciation in the wastewater are studied,the corrosivity of the wastewater before and after desulfurization tower is evaluated using weight loss method,and the corrosion products are analyzed by means of XRD,SEM and EDS. The results show that： the optimal desulfurization effect can be obtained when the gas-liquid ratio is 0. 5; when the gas-liquid ratio is 0. 6,the aeration of 50 min has certain inhibitory effect on SRB; after aeration,the corrosion rate of the wastewater at the outlet of the desulfurization tower is half of that at the inlet of it,but the corrosion caused by the residual oxygen at the outlet is still strong. The steel pipeline between the outlet of the desulfurization tower and the water injection tank is replaced by glass fiber reinforced plastic pipeline,and the good corrosion prevention effect is received. After aeration,the suspension containing S8 enteres the water injection tank,the synergistic effect of S8 with CO2causes a corrosion rate of the suspension as high as 1. 33 mm / a. Therefore it is suggested to that the filter device is used at the outlet of the water injection tank or the water injection tank is coated with anticorrosive coating.

关 键 词：含硫污水 曝气除硫 防腐措施 

分 类 号：TE49[石油与天然气工程—油气田开发工程]