Abstract:In order to ensure centrifugal blower safe running in WWTP and prevent surge in operation, in view of centrifugal blower characteristics and present research status, factors producing surge in WWTP were analyzed, reasons causing surge and measures preventing surge were studied. Considering from process design, different formula commonly used were compared and the appropriate oxygen requirement formula in technique design was obtained. Taking a sewage treatment plant with 1 phase of project as the example, according to the performance curves from factories and the testing results on spot, new surge flux of control point was calculated and an accurate air supply was identified. By changing operating procedure when switching blower, the clogging in aeration plate holes was decreased, the blower discharge resistance was reduced, which leads to blower running point deviating from the surge point. Thus, blower discharge resistance is down 5 kPa and the regeneration period of aeration plate is up 1 year. Placing an inducer in front of the blower can adjust the air inflowing angle in small flux. It changes the blower characteristicsand expands the blower regulation scope. The test results indicate that when flux control to 60%, the efficiency drops gently.
胡 坚, 蔡 兰, 刘 孟. 离心风机在污水处理中的喘振机理[J]. 排灌机械工程学报, 2011, 29(2): 139-143.
Hu Jian, Cai Lan, Liu Meng. Surge mechanism of centrifugal blower in WWTP. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(2): 139-143.
[1]吴玉林,陈庆光,刘树红.通风机和压缩机[M].北京:清华大学出版社,2005.[2]Galindo J,Serrano J R,Guardiola C,et al. Surge limit definition in a specific test bench for the characterization of automotive turbochargers[J]. Experimental Thermal and Fluid Science ,2006,30(5):449-462.[3]张红梅,赵建虎,代克杰.基于信息融合的风机喘振智能诊断方法研究[J].仪器仪表学报,2009,30(1): 143-146.Zhang Hongmei,Zhao Jianhu,Dai Kejie. Study on the surge intelligent diagnosis system for blower fan based on information fusion[J]. Journal of Scientific Instrument ,2009,30(1): 143-146.(in Chinese)[4]赵 丰.离心压缩机防喘振控制系统研究[D]. 大连:大连理工大学电子与信息工程学院,2006.[5]郭仁宁,金 杰.变频调速在离心压缩机喘振控制中的应用[J].风机技术,2008(5): 58-60.Guo Renning,Jin Jie. Frequency conversion velocity modulation in centrifugal compressor buzz control application[J]. Air Blower Technology ,2008(5): 58-60.(in Chinese)[6]李占良,袁民建,安卫平,等.一种新型带轴向进气预旋调节器的离心式高炉鼓风机[J].流体机械,2002,30(7): 17-20.Li Zhanliang,Yuan Minjian,An Weiping,et al. Centrifugal blast frunace blower with a new type of adjustable axial admission revoler[J]. Fluid Machinery ,2002,30(7): 17-20. (in Chinese)[7]上海市政工程设计研究总院《室外排水设计规范》国家标准管理组.GB 50014—2006 室外排水设计规范[S].北京:中国计划出版社,2006.[8]吴华明,涂 敏.活性污泥法需氧量计算方法的比较[J].中国给水排水,2007,23(10): 85-87.Wu Huaming,Tu Min. Comparison of calculation methods of oxygen demand for activated sludge process[J]. China Water & Wastewater ,2007,23(10):85-87.(in Chinese)[9]上海市政工程设计研究总院.CECS 149:2003 城市污水生物脱氮除磷处理设计规程[S].北京:中国工程建设标准化协会,2003.[10]北京市市政工程设计研究总院.给水排水设计手册:第5册[M].北京:中国建筑工业出版社,2004.[11]ATV-DVWKSpecialist Committees KA 5 and KA 6. ATV-DVWK-A 131E Dimensioning of Single Stage Activated Sludge Plants [S]. Hennef:Publishing Company of ATV-DVWK,Water,Wastewater,Waste,2000.[12]汤 跃,骆 寅,许燕飞.基于LabVIEW的泵装置特性的自动测试[J].排灌机械,2009,27(2): 91-94.Tang Yue,Luo Yin,Xu Yanfei. Automatic test for pump system characteristics based on LabVIEW[J]. Drainage and Irrigation Machinery ,2009,27(2):91-94.(in Chinese)[13]李艳坤,胡国清,潘科雷,等.一种简单可靠的高压离心鼓风机防喘振控制措施[J].厦门大学学报:自然科学版,1998,37(1): 46-51. Li Yankun,Hu Guoqing,Pan Kelei,et al. A simple and reliable control method for preventing surge of high pressure centrifugal airblower[J]. Journal of Xiamen University: Natural Science ,1998,37(1): 46-51. (in Chinese)[14]杨从新,王 斌.离心泵在启动阶段的瞬态三维数值模拟[J].排灌机械工程学报,2010,28(3): 122-125.Yang Congxin,Wang Bin. 3-D numerical simulation on transient characteristics of centrifugal pump during startingperiod[J]. Journal of Drainage and Irrigation Machinery Engineering ,2010,28(3): 122-125.(in Chinese)[15]成心德.离心通风机[M].北京:化学工业出版社,2006.[16]Galindo J,Serrano J R,Margot X,et al. Potential of flow prewhirl at the compressor inlet of automotive engine turbochargers to enlarge surge margin and overcome packaging limitations[J]. International Journal of Heat and Fluid Flow ,2007,28(3):374-387.[17]魏新利,付卫东,张 军.泵与风机节能技术[M].北京:化学工业出版社,2011.