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4-2 Structure and process of conventional rapid filter课程教案、知识点、字幕

接下来我们给大家介绍快滤池的构成和工作过程

快滤池的形式有多种

包括普通快滤池、虹吸滤池、无阀滤池、移动罩滤池、V型滤池等

虽然快滤池的形式不同,但主要构成和基本工作(过程)是一样的

下面我们以普通快滤池为例,介绍快滤池的主要构成

这个图是普通快滤池的结构示意图

我们从底部开始介绍,首先是配水系统

在过滤过程中起收集清水,在冲洗过程中起分配反冲洗水的作用

然后是铺设在配水系统之上的承托层,也称为垫层

承托层之上是滤料层,是截留水中杂质颗粒的主体

然后是冲洗排水槽,在冲洗过程中起收集冲洗水的作用

最后是集水渠,与冲洗排水渠相连,收集冲洗水并排出池外

快滤池的工作过程包括过滤过程和冲洗过程

过滤过程是截留杂质、生产清洁水的过程

而冲洗过程是把截留在滤层中的杂质冲洗出去,使之恢复过滤能力的过程

下面我们先来看看过滤过程是如何进行的

在过滤过程中,先关闭排水管阀门、冲洗水管阀门

开启进水管阀门、清水管阀门

原水沿进水管进入,经集水渠、冲洗排水槽,进入滤池

自上而下,通过滤料层、承托层,然后由配水系统收集,并经清水管排出

在原水通过滤料层的过程中,原水中的杂质就会被滤料层截留

经过一段时间的运行,滤层中截留的杂质逐渐累积

使得滤层的孔隙不断减少,导致过滤阻力逐渐增加

当过滤阻力增加到最高允许值,大约在1.5-3.0米时,或出水浊度超过标准时

应停止过滤,对滤池进行冲洗

下面我们来看看冲洗过程

在冲洗过程中,关闭进水管阀门、清水管阀门,开启冲洗水管阀门、排水管阀门

冲洗水从下而上通过配水系统、承托层、滤料层

并由冲洗排水槽收集,经集水渠汇集后排出

在冲洗过程中,水流使滤料层膨胀、悬浮,滤料颗粒之间相互摩擦

附着在滤料表面的杂质被冲刷下来,由冲洗水带走

当冲洗一段时间,滤料层中的杂质被冲洗干净时

滤料便恢复了截留杂质的能力,此时冲洗过程结束

过滤周期是指从过滤开始到过滤终止的时间

其长短与原水水质、滤速、滤层规格等有关,一般应大于12-24h

冲洗周期是指冲洗开始到冲洗终止的时间,一般几分钟

工作周期是指从过滤开始到冲洗终止的时间

以上这就是快滤池的工作过程

在过滤过程中,杂质会不断累积,导致过滤阻力逐渐增加

那么随着过滤过程的进行,水头损失是如何变化的呢?

这就是下一节我们要讨论的问题

Water and Wastewater Treatment Engineering: Physicochemical Technology课程列表:

Chapter 0 Introduction

-0-2 Water treatment process

--0-2 Water treatment process

-0-3 Wastewater treatment process

--0-3 Wastewater treatment process

-Chap 0 Homeworks

Chapter 1 Coagulation and flocculation

-1-1 Introduction

--1-1 Introduction

-1-2 Properties of colloids

-- 1-2 Properties of colloids

-1-3 Mechanisms and process of coagulation and flocculation

--1-3 Mechanisms of coagulation and flocculation

-1-4 Coagulant and coagulant aids

-- 1-4 Coagulant and coagulant aids

-1-5 Kinetics of coagulation and flocculation

--1-5 Kinetics of coagulation and flocculation

--Announcement

-1-6 Factors affecting the coagulation performance

--1-6 Factors affecting the coagulation performance

-1-7 Facilities for coagulation and flocculation

--1-7 Facilities for coagulation and flocculation

-Chapter 1 Homeworks

Chapter 2 Sedimentation and clarification

-2-1 Introduction

--2-1 Introduction

-2-2 Discrete particle settling

--2-2 Discrete particle settling

-2-3 Flocculent settling

--2-3 Flocculent settling

-2-4 Zone settling

--2-4 zone settling

-2-5 Rectangular settling tank

--2-5 Rectangular settling tanks

-2-6 Process calculation of rectangular settling tanks

--2-6 Process calculation of rectangular settling tanks

-2-7 Vertical Flow (up-flow ) and radial flow settling tank

--2-7 Vertical Flow (up-flow ) and radial flow settling tank

-2-8 Plated sedimentation tank

--2-8 Plated sedimentation tank

-2-9 Clarification pool

--2-9 Clarification pool

-3D interactive demonstration for settling tanks

--Method for browser setting

--Up-flow settling tank

--Clarification pool

--Circular settling tank

-Chapter 2 Homework (part 1)

-Chapter 2 Homework (part 2)

Chapter 3 Air floatation

-3-1 Introduction

--3-1 Introduction

-3-2 Theoretical foundation of air floatation

--3-2 Theoretical foundation of air floatation

-3-3 Pressurized dissolved air flotation

--3-3 Pressurized dissolved air flotation

-Chapter 3 Homework

Chapter 4 Filtration

-4-1 Introduction

--4-1 Introduction

-4-2 Structure and process of conventional rapid filter

--4-2 Structure and process of conventional rapid filter

-4-3 Water head loss of filter

--4-3 Water head loss of filter

-4-4 Filtration method of filter

--4-4 Filtration method of filter

-4-5 Filter media

--4-5 Filter media

-4-6 Water distribution system

--4-6 Water distribution system

-4-7 Filter backwashing

--4-7 Filter backwashing

-4-8 Siphon filter

--4-8 Siphon filter

-4-9 Gravity valveless filter

--4-9 Gravity valveless filter

-4-10 Movable hood filter

--4-10 Movable hood filter

-3D interactive demonstration for filtration tanks

--Usage and description for 3-D demonstration

--Method for browser setting

--Conventional rapid filter

--Siphon filter

-Chapter 4 Homework

Chapter 5 Disinfection

-5-1 Introduction

--5-1 Introduction

-5-2 Influence factors of disinfection

--5-2 Influence factors of disinfection

-5-3 Chlorine disinfection

--5-3 Chlorine disinfection

--Correction

-5-4 Chlorine dioxide disinfection

--5-4 Chlorine dioxide disinfection

-5-5 Ultraviolet disinfection

--5-5 Ultraviolet disinfection

-Chapter 5 Homework

Chapter 6 Ion-exchange

-6-1 Ion-exchange resin

--6-1 Ion-exchange resin

-6-2 Properties of ion-exchange reactions

--6-2 Properties of ion-exchange reactions

-6-3 Properties of cation exchange resin

--6-3 Properties of cation exchange resin

-6-4 Properties of anion exchange resin

--6-4 Properties of anion exchange resin

-6-5 Softening system using ion exchange

--6-5 Softening system using ion exchange

-6-6 Desalination system using ion exchange

--6-6 Desalination system using ion exchange

-6-7 Ion-exchange equipment

--6-7 Ion-exchange equipment

-6-8 Treatment of industrial wastewater by ion-exchange method

--6-8 Treatment of industrial wastewater by ion-exchange method

-Chapter 6 Homework

Chapter 7 Membrane separation

-7-1 Introduction

--7-1 Introduction

-7-2 Principle and characteristics of electrodialysis

--7-2 Principle and characteristics of electrodialysis

-7-3 Configuration of electrodialysis unit

--7-3 Configuration of electrodialysis unit

-7-4 Operating parameters for electrodialysis unit

--7-4 Operating parameters for electrodialysis unit

-7-5 Principle and process of reverse osmosis

--7-5 Principle and process of reverse osmosis

-7-6 Operating parameters for reverse osmosis

--7-6 Operating parameters for reverse osmosis

-7-7 Principles and characteristics of UF and MF

--7-7 Principles and characteristics of UF and MF

-7-8 Design of ultrafiltration and microfiltration process

--7-8 Design of ultrafiltration and microfiltration process

-Chapter 7 Homework

Chapter 8 Redox method

-8-1 Fundamental knowledge and classification

--8-1 Fundamental knowledge and classification

-8-2 Ozonation

--8-2 Ozonation

-8-3 Photo-catalytic oxidation

--8-3 Photo-catalytic oxidation

-8-4 Supercritical water oxidation

--8-4 Supercritical water oxidation

-8-5 Electrolysis

--8-5 Electrolysis

-Chapter 8 Homework

Chapter 9 Adsorption

-9-1 Introduction

--9-1 Introduction

-9-2 Adsorption equilibrium and adsorption isotherm

--9-2 Adsorption equilibrium and adsorption isotherm

-9-3 Adsorption breakthrough curve

--9-3 Adsorption breakthrough curve

-Chapter 9 Homework

4-2 Structure and process of conventional rapid filter笔记与讨论

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