Liquid Mixers

Change Can Mixers

  • Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end.
  • These mixers are called change can mixers because they are provided with an arrangement for lifting the agitator head mixing element out of the mixing vessel once mixing is completed, thus enabling movement of the mixing vessel.
  • Some change can mixers have mixing vessels that can be lifted and lowered while keeping the agitator head stationary
  • Removal of the mixing vessel provides the following advantages:
  • Material can be weighed accurately.
  • It is easier to clean the mixing vessel, resulting in less batch-to-batch contamination.
  • The packing glands and seals do not come in contact with the material, thus eliminating product contamination.
  • Multiple cans can be used to enhance productivity without downtime during material charging and discharging.
  • Change can mixers may be provided with one or more mixing blades.
  • Because of the vertical configuration, these mixers can be operated at as little as 10% of their designed working capacity.
  • Discharge of highly viscous materials from the mixing vessel can be achieved by locating the vessel on a separate hydraulically operated automatic discharge system.

 

Other Blades

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
High Efficiency Impeller
Hydrofoil impellers are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers..Read more
Anchor Mixer
Anchor mixers are among the more common types of high-viscosity liquid mixers..Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity…Read more

Related Articles

Mixer Designs for high viscosity mixing – High viscosity mixers can be designed for batch as well as continuous operation…Read More

 

 

Helical Mixer

 

  • Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.
  • These mixers have major advantages over anchor mixers because of their ability to generate strong top-to-bottom motion even with viscous materials.
  • To improve heat transfer through the jacket, wipers and scrapers can be attached to the outer periphery ribbon flights.
  • Helical mixers can be formed to fit in conical-bottom tanks, where the ribbon flights force the material to the bottom discharge, thereby facilitating greater yield from each batch mix.
  • Helical mixers work efficiently with heavy pastes as well as with flowable powders. A helical impeller is shown in Fig

Other Blades

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity…Read more
High Efficiency Impeller
 are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers…Read more
Anchor Mixer
 Anchor mixers are among the more common types of high-viscosity liquid mixers.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

Related Articles

Mixer Designs for high viscosity mixing – High viscosity mixers can be designed for batch as well as continuous operation…Read More

 

Anchor Mixer

 

 

  • Anchor mixers are among the more common types of high-viscosity liquid mixers.
  • Anchor-shaped impellers are used for liquid viscosities between 5000 and 50,000 cP.
  • The swing diameter of the anchor is generally 90 to 95% of the mixing vessel.
  • There is low clearance between the impeller and the internal wall of the vessel.
  • Anchor impellers are preferred when heat transfer through a jacket is desired along with good mixing.
  • Scraper arrangements or wipers may be provided to remove material deposited on internal walls of the vessel, further improving the transfer of heat.
  • Anchors are commonly used in crystallization reactors.
  • Speeds range from approximately 5.5 to 45 rpm
  • Impeller diameters range from 600 to 3000 mm. An anchor impeller is shown in Fig.

Other Blades

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity…Read more
High Efficiency Impeller
 are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers…Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

 

Related Articles

Mixer Designs for high viscosity mixing – High viscosity mixers can be designed for batch as well as continuous operation…Read More

 

 

Paddle Turbine

6 Blade Turbine

 

  • Paddle Turbines –  Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers.
  • In open turbines, the impeller blades are mounted directly on the hub. The number of blades may be two,four, six, or eight.
  • A flat-blade turbine impeller with six blades is shown in Figure

Other Articles

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity…Read more
High Efficiency Impeller
 are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Anchor Mixer
Anchor mixers are among the more common types of high-viscosity liquid mixers..Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

 

 

High Efficiency Impeller

 

  • Hydrofoil impellers are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate. Since most industrial applications require high pumping capacity and less fluid shear, these impellers are popular in the majority of mixer installations.
  • Figure shows a high-solidity-ratio hydrofoil impeller used for high viscosity materials and gas applications.
  • Advances in the hydrofoil impeller designs have lead to the development of an additional family of these impellers. Figure above  illustrates the four types of these impellers with different solidity ratios, the ratio of the total blade area to a circle circumscribing the impeller.
  • Low solidity ratio impellers are efficient for liquid blending and solid suspensions.
  • Higher-solidity-ratio impellers are more effective for axial flow patterns as the viscosity increases.
  • For gas–liquid dispersions, higher-solidity-ratio impellers with wide blades provide an effective area of preventing bypass of gas through the impeller hub.

 

Other Blades

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity…Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers..Read more
Anchor Mixer
Anchor mixers are among the more common types of high-viscosity liquid mixers..Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

Related Articles

Axial Turbine – Marine propellers, pitched blade turbines, hydrofoil impellers are axial turbines…Read more

 

 

 

Pitched Blade Turbine

Pitched Blade Turbines

 

  • Pitched blade turbines are axial flow impellers used in top-entering agitators.
  • A pitched blade turbine consists of a hub on which an even number of blades are mounted at an angle of 10 to 90 degree with respect to the horizontal.
  • The most commonly used impeller of this type is the four-bladed 45 degree pitched-blade turbine.
  • The pitched-blade turbine is generally used for impeller diameters ranging from 450 mm to 3 m with connected power of up to 500 hp. It is used primarily in flow control applications. Figure  shows the commonly used 45 degree pitched-blade turbine.
  • Since the fluid discharge from a pitched-blade turbine has both axial and radial components, it is considered a mixed-flow impeller.
  • The pitched-blade turbine impeller is generally fabricated. The blades may be welded directly onto the impeller shaft or are bolted to the shaft hub.
  • The pitched blade turbine is available in up-pumping and down-pump configration depending on the application

Other Blades

Marine Propellers
A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity..Read more
High Efficiency Impeller
Hydrofoil impellers are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers..Read more
Anchor Mixer
Anchor mixers are among the more common types of high-viscosity liquid mixers..Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

 

Related Articles

Axial Turbine – Marine propellers, pitched blade turbines, hydrofoil impellers are axial turbines…Read More

 

 

Marine Propellers

 

  • Marine propellers are also used on side-entering mixers and are mounted with the impeller shaft inclined at an angle with respect to the vessel centerline, for improving process results.
  • The propeller is generally operated to produce down pumping action directed toward the bottom of the vessel, until deflected by the floor or the wall of the vessel.
  • The shearing action of the propeller is significant at high speeds.
  • Standard-blade marine propellers with square pitch are commonly used. Variations include four-bladed propellers, propellers with saw tooth edges for tearing action and perforated blades for shredding and breaking of lumps.
  • Speed Range – 400 – 1800 rpm (depending on diameter)
  • Speed Range – 400 – 1800 rpm (depending on diameter)
  • The power number for top-entering propellers and portable mixers in the turbulent range at a proximity factor of 1 is 0.87.
  • For side-entering mixers the power number ranges from 0.77 for propeller diameters up to 700 mm [6]. Propellers are generally manufactured by the casting process.

A propeller is a high-speed axial flow impeller generally used for liquids of low viscosity.

Other Blades

Pitched Blade Turbine
Pitched blade turbine are axial flow impellers used in top-entering agitator..Read more
High Efficiency Impeller
Hydrofoil impellers are also referred to as high-efficiency impellers since they are designed to maximize fluid flow and minimize shear rate..Read more
Flat Blade Disc Turbine
The turbine is a disk-type (six-blade turbine) radial flow impeller..Read more
Paddle Turbine
Open-blade impellers like the flat blade turbine (also known as a paddle impeller) and backswept open turbine are radial flow impellers..Read more
Anchor Mixer
Anchor mixers are among the more common types of high-viscosity liquid mixers..Read more
Helical Mixer
Helical mixers are capable of operating over a wide band of viscosities, ranging from low-viscosity liquid to highly viscous materials up to 4 million cP.. Read more
High Shear Impeller
High-shear impellers are used in applications that require a high shearing action, as in grinding, dispersing pigments, and making emulsions…Read more
Change Can Mixers
Change can mixers are configured vertically, with a vertical cylindrical vessel and a bottom dished end..Read more

Related Articles

Axial Turbine – Marine propellers, pitched blade turbines, hydrofoil impellers are axial turbines…Read more