雅克拉污水处理站污水储罐腐蚀及腐蚀治理措施

Sewage tank corrosion and corrosion control measures in Yakela sewage treatment station

雅克拉污水处理站设计处理污水量500 m^3/d,来水主要有雅克拉站污水、YK12井单井流程污水、大涝坝站污水,处理后的污水达到A3标注。污水站自2008年投运至今,污水储罐本体累计穿孔10次,主要集中沉降罐本体(6次)和内部中心柱出口管线(1次)和注水罐本体(2次)及罐底(1次)。沉降罐内中心筒刺漏已严重影响污水处理效果,为维持污水处理需要和减少现场动火安全隐患,暂时对储罐本体刺漏采用环氧树脂+玻璃布堵漏。为彻底解决储罐腐蚀问题,需对污水站进行停运检修,停运检修周期长(达2月)、检修费用高(全面检修花费135万元)、检修期间污水倒运难。2010年8月-10月主要对污水站四个污水储罐进行开罐检查,根据腐蚀情况进行腐蚀管壁的更换和罐底打补丁,并对污水储罐安装牺牲阳极块和99.5%无溶剂环氧涂层,根据污水"曝氧"腐蚀影响,在污水接收罐罐顶增加除氧剂加注流程。

The Yakela sewage treatment station has a designed sewage sreatment capacity of 500m^3/d.It mainly treats sewage from the Yakela gas gathering and treatment station,well YK12 and Dalaoba gas gathering and treatment station.Water after being treated by the facility meets A3 standards.Since the sewage treatment station became operational in 2008,its storage tanks have been punched by corrosion 10 times.Sedimentation tank focused on the body（6 ） and the internal central pillar export pipeline（1） and injection water tank body （2） and the bottom of the tank（l）.Sedimentation tank center tube has seriously affected the washout effect of sewage treatment,sewage treatment needed to maintain the hot work site safety hazards and reducing the time being on the tank body washout ＋ glass fabric with epoxy resin sealing.To solve the storage tank corrosion problems,the need for maintenance of the sewage station outage,outage maintenance cycle length（up to 2 months）,the high cost of maintenance（1.35 million overhaul costs）,maintenance is difficult during the sewage out of luck.August 2010 -10 January,the main water tank of sewage stations were opened four cans of checks carried out under the corrosion and corrosion of tank bottom wall of the replacement patch,and install sewage storage tank sacrificial anode block and 99.5%had no soJvent epoxy coating,according to sewage＂aerobic＂corrosive effects of an increase in the sewage receiving oxygen scavenger top jars filling process.