两级软化-TUF-RO-DTRO工艺在循环冷却水近零排放治理中的工程应用  

Application of Two-stage softening-TUF-RO-DTRO process in near zero discharge treatment of circulating cooling water

作　　者：林金华 LIN Jinhua(Grand Blue(Xiamen)Solid Waste Treatment Co.,Ltd.,Xiamen 361008,China)

机构地区：[1]瀚蓝(厦门)固废处理有限公司,厦门361008

出　　处：《给水排水》2023年第4期63-70,共8页Water & Wastewater Engineering

摘　　要：介绍了采用两级软化-TUF-RO-DTRO工艺在瀚蓝环境下属某垃圾焚烧发电厂循环冷却水近零排放治理中的工程运用,处理规模540 m^(3)/d。运行结果表明:进水为循环冷却水系统排污水,进水COD、总硬度(以碳酸钙计)、氯离子、硫酸盐、溶解性总固体和电导分别为180 mg/L、1 800 mg/L、1 200 mg/L、960 mg/L、4 000 mg/L、5 500μs/cm时,系统最终产水率为88%~90%,出水指标分别为13.0 mg/L、21.0 mg/L、120.0 mg/L、68.0 mg/L、240.0 mg/L、491.0μs/cm。其水质指标达到《城市污水再生利用工业用水水质》(GB/T 19923-2005)表1中的敞开式循环冷却水系统补充水要求回用于补水,产生10%~12%的DTRO浓缩液回喷焚烧炉膛用于炉膛降温,最终达到循环冷却水近零排放工程运用。此外,在实际运行中产生显著的经济效益,为9.23元/m^(3),为后续循环水近零排放治理工程在垃圾焚烧发电厂中的运用提供指导意义。Introducing the engineering application of Two-stage softening-TUF-RO-DTRO process in near zero discharge treatment of circulating cooling water in a waste incineration power plant under Grand Blue Environment,of which the scale is 540 m^(3)/d.The operation result shows that the influent water of this process is the sewage from the circulating cooling water system,and that when the influent COD,total hardness(calculated as calcium carbonate),chloride ion,sulfate,total dissolved solids and conductivity respectively are 180 mg/L,1800 mg/L,1200 mg/L,960 mg/L,4000 mg/L,5500μs/cm,the final water production rate of the system is 88%~90%,the effluent respectively being 13.0 mg/L,21.0 mg/L,120.0 mg/L,68.0 mg/L,240.0 mg/L,491.O us/cm.Its water quality index reaches the supplementary water of the open circulating cooling water system in Table 1 of The reuse of urban recycling water-Water quality standard for industrial uses(GB/T 19923-2005)is required to be reused for supplementary water,producing 10%~12%of DTRO concentrate for back spray incineration The furnace is used to cool the furnace,and finally achieve the near zero discharge engineering application of circulating cooling water.In addition,this near zero discharge project has produced obvious economic benefits in actual operation,which is 9.23 yuan/m^(3)water,which provides guiding significance for the follow-up near zero discharge treatment project of circulating water in waste incineration power plant.

关 键 词：循环冷却水 近零排放 两级软化 TUF RO DTRO 

分 类 号：TU992[建筑科学—市政工程] X703[环境科学与工程—环境工程]