多面球填料拦截沉淀工艺在水厂改造中的应用
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摘要
从突破传统沉淀技术的角度出发,在微絮凝拦截沉淀技术的基础上,提出将一种多面球填料作为拦截材料用于沉淀池中的水处理工艺,并对该工艺的技术特点和在水厂改造中的实际应用效果进行了研究。结果表明:多面球填料拦截沉淀工艺对颗粒物的去除主要是通过不断改变水流方向形成涡旋,从而增加矾花的有效碰撞,使得矾花变得密实,以利于其沉淀去除。通过将该多面球填料拦截沉淀工艺应用于汨罗新市水厂的改造中,并保留水厂原有的斜管沉淀池,一并投入运行,运行结果表明:多面球填料沉淀池出水浊度为2NTU以下,而斜管沉淀池出水浊度则在2NTU以上,表明多面球填料沉淀池在低浊度水的处理效果上优于斜管沉淀池,可为农村中小型水厂改造提供参考。
From the perspective of breaking through the traditional precipitation technology,on the basis of microflocculation interception and precipitation technology,this paper proposes a precipitation process using a multi-face ball filler as an interceptor in sewage treatment,the decarbonization and desulfurization of power plants and water purification tower.The paper also studies the technical characteristics of the process and the practical application effect.The results show that the removal of particulate matter by polyhedral sphere filler is mainly through changing the direction of water flow to form vortices,increasing the effective collision of alum,and making alum dense,which is conducive to sedimentation effect.The paper applies the process to the renovation of the water plant in Miluoxin City,and retains the original inclined pipe sedimentation tank of the water plant and puts it into operation.The results show that the turbidity of effluent from polyhedral sphere sedimentation tank can reach below 2 NTU,while that from inclined tube sedimentation tank is above 2 NTU.The treatment effect of polyhedral sphere on lowturbidity water is better than that of inclined tube,which provides reference for the transformation of small and medium-sized water plants in rural areas.
From the perspective of breaking through the traditional precipitation technology,on the basis of microflocculation interception and precipitation technology,this paper proposes a precipitation process using a multi-face ball filler as an interceptor in sewage treatment,the decarbonization and desulfurization of power plants and water purification tower.The paper also studies the technical characteristics of the process and the practical application effect.The results show that the removal of particulate matter by polyhedral sphere filler is mainly through changing the direction of water flow to form vortices,increasing the effective collision of alum,and making alum dense,which is conducive to sedimentation effect.The paper applies the process to the renovation of the water plant in Miluoxin City,and retains the original inclined pipe sedimentation tank of the water plant and puts it into operation.The results show that the turbidity of effluent from polyhedral sphere sedimentation tank can reach below 2 NTU,while that from inclined tube sedimentation tank is above 2 NTU.The treatment effect of polyhedral sphere on lowturbidity water is better than that of inclined tube,which provides reference for the transformation of small and medium-sized water plants in rural areas.
引文
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[2]李欣萍,孙丽云,张烨.斜板沉淀池处理高浊度微污染水试验研究[J].河南科技,2018(11):139-141.
[3]吕尤,李星,俞岚等.典型的高效混凝与沉淀工艺[J].净水技术,2012,31(1):38-41.
[4]罗启达,周克明,陈伟等.ACTIFLO---一种新型高效水处理澄清工艺[J].净水技术,2004(1):38-41.
[5]Watanabe Y,Kasahara S,Iwasaki Y.Enhanced flocculation/sedimentation process by ajet mixed separator[J].Water Science and Technology,1998;37(10):55-67.
[6]Xiang P,Wan Y H,Wang X,et al.Numerical simulation and experimental study of electrocoagulation grid flocculation tank[J].Water Science and Technology,2018,78(4):786-794.
[7]张莹,龚泰石.电絮凝技术的应用与发展[J].安全与环境工程,2009,16(1):38-40,43.
[8]王华生,刘祖文.沉淀工艺的研究现状及其发展趋势[J].铜业工程,2004(1):54-56.
[9]胡盼盼.微絮凝阶段絮体颗粒形态特征分析及控制技术研究[D].哈尔滨:哈尔滨工业大学,2011.
[10]江夏.水处理沉淀工艺强化及水量变化适应性研究[D].哈尔滨:哈尔滨工业大学,2013.
[11]孙红梅,杨小丽,陆继来,等.微污染水处理中生物填料的应用研究[J].安全与环境工程,2008,15(4):55-59.
[12]吕春生,曲久辉,李大鹏,等.微絮凝拦截沉淀处理低温低浊水[J].中国给水排水,2000(1):9-13.
[13]王华生,刘祖文,邬长福,等.拦截斜板沉降技术研究[J].净水技术,2004(3):12-13,48.
[14]郭海平.投加填料强化沉淀处理城市污水试验研究[D].青岛:青岛理工大学,2010.
[15]莫锡荣,江生南,冯羽,等.多面球填料的流体力学和传质性能[J].北京化工学院学报,1981(3):112-121.
[16]孟荣国.惯性效应在混凝中的动力学作用[J].科技信息(科技教研),2007(21):119,171
[17]王绍文.惯性效应在絮凝中的动力学作用[J].中国给水排水,1998(2):13-16,3.