Types of Agitators

Type of agitators used in reactors

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Anchor Agitators: Anchor Agitators consists of a shaft and an anchored propeller that can be mounted centrally or at an angle. It is mainly used in reactors.

Paddle Agitators: Paddle Agitators is one of the most important types of agitators whose blades reach the tank wall. A Paddle Agitators is used where a uniform laminar fluid is required. It implements heavy-duty mixing and proves to be an excellent device for low speed. Its simple structure makes the machine easy to manage.

Radial Propeller Agitators: The radial agitator consists of a propeller similar to a marine propeller. They consist of two to four blades that move in a screw-like manner, pushing the material parallel to the shaft for agitation.

Propeller Agitators: It is an axial flow high performance mixer consisting of three blades mounted on the main shaft. They are ideal for mixing low viscosity and medium viscosity fluids and improving uniformity. Propeller agitators are popular for simple mixing jobs.

Turbine Agitators: Turbine Agitators are widely used to perform all types of mixing operations and to handle fluid and liquid or gas reactions of various viscosity. Its ability to produce high radial flow facilitates the dispersion operation.

Helical Agitators: These agitators have blades with a twisting mechanism, just like the threads of a screw. The curve results in strenuous movement of the fluid to be agitated. Spiral mixers are best suited for mixing viscous liquids.

top entry mixer is designed for stirring low viscosity material or heavy material. It manufactured with high strength and hard surface gear transmission. Gear drive agitators utilize oversize tapered roller bearings on the output shafts to provide excess capacity to adjust the loads.

Applications of Agitator Stirrer

Seed,Bump or Innoculum tanks
Fermentation Products Holding
Antibiotics
Medicants Antiseptics
Cosmetics And Perfumes
Insecticides & Disinfectants
Compounds & General Processing
Shampoo
Shower Gels
Creams And Lotion

Types of agitators models, application and comparison:

Agitator models	Application	Advantages	Disadvantages
Paddle: Flat paddles Finger paddles Gate paddles	Solid mixing Slurry mixing	Heavy duty mixing Adjustable to 2 or 4 blades Excellent for low-speed	High power consumption Inefficient liquid circulation
Counter-rotating paddles	Paste mixing	Efficient in the laminar condition Blending	Vibrates at high speed Not suitable for liquid mixing
Tumbling	Blending	Paste and viscous material mixing	Not suitable for fluid solutions
Disk and cone	Polymers and dispersion preparation	Viscous solution mixing with 60 revolutions per second	Paste mass cannot be handled
Free shaft suspension	Sugar processing	Suspension, Thickening operation	High power requirement
Impeller type	Emulsion preparations	Good temperature control Creates axial flow Good phase mixing	Not for viscous materials
Turbine agitator Straight blade Pitched blade Vaned disk Curved blade	Liquid and gas reactions	Excellent for dispersion operations Creates good radial flow	Only for less viscous liquid below 15 to 20 Ns/m²
Slotted rotary Rotating disk	Powders and cosmetics	Unique particle size and homogeny product formation	Minimum axial flow Operates better only for 0.1 to 0.01mm particle size solids
Screw Screw in cone	Food and snack processing	Homogenization of high viscous materials	Not suitable for miscibility operations
Helical Ribbon type Helical screw	Polymer and paints processing	Handles viscoelastic liquids that are more than 20 Ns/m²	Less radial flow patterns
Gate	Blending operations	Good speed control Handles pseudoplastic liquids	Not suitable for gas to liquid operations
Anchor Round anchor Combine anchor and gate	Milk and fat processing	Efficient heat exchange between the reactor walls and reaction mass (fluids)	High power consumption Requires heavy duty gearbox
Propeller	Dairy and food processing Chemicals processing	Less Metzner –Ott shear rate constant Homogenization Good miscibility	Motion of liquid starts on one spot Dead spots formation at high rotation speeds The occurrence of solids settling at low speeds

Types of Agitators – Design and Usage

Types of Agitators – Design and Usage