《污水的三级处理讲义.ppt

污水的三级处理 过滤 气浮 离子交换 膜分离法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 过滤 一、过滤机理 1、阻力截留 2、重力沉降 3、接触絮凝 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二、快滤池的构造及工作过程 （1）构造 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. （2）工作过程 过滤过程： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 反冲洗过程： Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 三、滤料和承托层 1、滤料 要求：有足够机械强度； 有足够化学稳定性； 有一定颗粒级配和适当空隙率。 2、承脱层：天然卵石或碎石 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 四、快滤池的冲洗 目的：清除滤料中截留的污物，使滤池恢复工作能力。 方法：水流冲洗。 1、滤层膨胀率和冲洗强度 （1）滤层膨胀率 （2）冲洗强度 单位面积滤层上所通过的冲洗流量称为冲洗强度。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2、配水系统 （1）大阻力配水系统 （2）小阻力配水系统 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3、冲洗水的供应 冲洗水泵供给：投资省、操作麻烦，耗电大； 高位水箱供给：造价高、操作简单，耗电较少。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4、排水设备 及时将冲洗废水排出，使冲洗水均匀分布在滤料面积上。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 五、快滤池的设计 F=Q/v F—滤池总面积m2 Q—设计流量m3/h v—设计滤速m/h 每个滤池面积：f=F/N N—滤池个数。 Evaluation only. Created with Aspose.S