同©大学 Tongji University The mixing operations in water treatment can be classified as: 1)Continuous-rapid mixing (30sec), 2)Continuous mixing (on going)
Tongji University The mixing operations in water treatment can be classified as: 1) Continuous-rapid mixing (< 30sec), 2) Continuous mixing (on going)
同燎大学 Tongji University Each unit operation will be described separately below followed by a description of: 1)Types of mixers and flocculation devices, 2)Analysis of energy requirements for these operations
Tongji University Each unit operation will be described separately below followed by a description of: 1) Types of mixers and flocculation devices, 2) Analysis of energy requirements for these operations
同燎大学 Tongji University 1.Continuous Rapid Mixing Continuous rapid mixing is often used to mix coagulants within water. Applications include: 1.The blending of chemicals with water e.g.the addition of alum or iron salts prior to flocculation and settling or for dispersing chlorine and hypochlorite into water for disinfection. 2.The addition of chemicals to sludge to improve their dewatering characteristics
Tongji University 1. Continuous Rapid Mixing Continuous rapid mixing is often used to mix coagulants within water. Applications include: 1. The blending of chemicals with water e.g. the addition of alum or iron salts prior to flocculation and settling or for dispersing chlorine and hypochlorite into water for disinfection. 2. The addition of chemicals to sludge to improve their dewatering characteristics
月©大学 Tongji University Typical examples of the types of mixers used in water treatment facilities Mixing device Mixing time, (seconds) Applications/remarks Static in-line mixers, <1 Instantaneous mixing of chemicals like in-line mixers A13+,Fe3,Cl2,and cationic polymer High-speed induction <1 Same as the above mixers Pressurized water jets <1 In water treatment practice and for reclaimed water applications Turbine and propeller 2-20 Mixing of chemicals in solution feed mixers tanks <1 Chemicals to be mixed are introduced in Pumps the suction intake of the pump
Tongji University Typical examples of the types of mixers used in water treatment facilities Mixing device Mixing time, (seconds) Applications/remarks Static in-line mixers, in-line mixers < 1 Instantaneous mixing of chemicals like Al3+, Fe3+, Cl2，and cationic polymer High-speed induction mixers < 1 Same as the above Pressurized water jets < 1 In water treatment practice and for reclaimed water applications Turbine and propeller mixers 2-20 Mixing of chemicals in solution feed tanks Pumps < 1 Chemicals to be mixed are introduced in the suction intake of the pump
同森大学 Tongji University Mixer is consist of crossing bars installed inside a tube http://www.nt-outai.com/outai/pro.htm
Tongji University Mixer is consist of crossing bars installed inside a tube http://www.nt-outai.com/outai/pro.htm