超临界水氧化六硝基菧废水及其对反应釜腐蚀研究  

STUDY OF SCWO 2,2',4,4',6-HEXANITROSTILBENE WASTEWATER AND ITS CORROSION OF THE REACTOR

作　　者：赵军霞[1] 柴涛[1] 赵双喜 林亮亮 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]三门峡化工机械有限公司,河南三门峡472000

出　　处：《水处理技术》2010年第12期50-54,共5页Technology of Water Treatment

摘　　要：在半连续化超临界水氧化装置中进行六硝基菧废水的处理及其对反应釜的腐蚀试验:用正交试验考察反应温度、时间和压力等影响因素,确定最佳工艺条件;将316L、304不锈钢和600镍基合金3种材料以挂片的形式置于反应釜内,研究其在相同的腐蚀时间和氧量、温度在470℃和570℃条件下的材料腐蚀情况。结果表明:在通入的氧气压力为1.8 MPa(过量)的情况下,COD的去除率随着温度、压力和停留时间的提高而提高,最佳工艺条件为反应温度560℃、压力27 MPa、停留时间30 s,COD的去除率为99%以上;在超临界状态下3种材料均被不同程度腐蚀,且随着温度升高腐蚀程度加剧,材料的耐腐蚀性强弱顺序为:600镍基合金>316L不锈钢>304不锈钢。In semi-continuous supercritical water oxidation unit,Using the orthogonal experiment to study the reaction temperature,residence time and pressure factors,Determineing the optimum conditions.the following three materials which were stainless steel 316L,304 and 600 nickel-based alloys were hung on a wire inside the reactor in the form of hanging tablets,to study their corrosion in the same time and oxygen at 470 ℃and 570 ℃ of supercritical temperature.The results show that： in the case of excess oxygen（1.8 MPa）,COD removal rate increased with the temperature,pressure and residence time.The best reaction condition is 560 ℃,27 MPa pressure,30 s residence time.Its COD removal rate is above 99%;in the supercritical state,and with the temperature rises,the corrosion was increased.the order of corrosion resistance was： 600316L304.

关 键 词：超临界水氧化 正交试验 不锈钢 镍基合金 

分 类 号：X703.1[环境科学与工程—环境工程]