摘要
针对镇海炼化污水场MBBR工艺生化池曝气管频繁断裂进行了原因分析,并提出了整改方案。对检修过程中的最大难题—填料转移进行了方案比选,首次提出气固喷射器转移法。采用已有经验公式对MBBR填料转移专用喷射器进行了计算设计,并用CFD软件进行了数值模拟验证,并实现了成功应用。该方法代替了传统池内人工打包转移方式,避免人员直接接触高浓度H2S的危险,同时减少了臭气外溢对环境的污染,并保存了填料的生物膜活性,以便检修后能迅速恢复生产,对类似污水处理工艺的检修有借鉴意义。
This article has analyzed the reason of frequent fracture of the aerial tube in biochemical tank during the Moving Bed Biofilm Reactor(MBBR)process for wastewater treatment in ZRCC refinery,with an improvement proposal offered.The evaluation and comparison of different methods for filler transfer,which is the most challenging problem during the equipment overhaul,has been done.The gas-solid ejector transfer method was proposed in engineering application for the first time in this article.The ejector for filler transfer in MBBR process was designed and calculated by using the existing empirical formula,the numerical simulation was carried out with CFD software,and it has been successfully applied in practical engineering cases finally.The gas-solid ejector transfer method as a substitute for the traditional manual packing and transfer method has prevented the human body from contacting the high-concentration hydrogen sulfide,meanwhile it reduced the environmental pollution caused by odor spillage.The method could also still retain the biofilm activity of the filler,which would help resume operation more quickly after the equipment overhaul.This experience could be referenced by other wastewater treatment process.
作者
徐振杨
Xu Zhenyang(Sinopec Zhenhai Refining&Chemical Company,Ningbo Zhejiang 315207,China)
出处
《石油石化绿色低碳》
2019年第5期65-69,共5页
Green Petroleum & Petrochemicals
关键词
MBBR
填料
转移
喷射器
MBBR
plastic filler
transfer
ejector
