The double cone mixer is a classic mixing equipment widely used in the pharmaceutical, chemical, food, dye and other industries, known for its efficient and uniform mixing ability.
The following is a detailed breakdown of its working principle:
1、 Core structure
To understand its principle, first understand its core structure. The double cone mixer mainly consists of three parts:
Double cone mixing container: This is the core of the equipment, consisting of two conical bottoms joined together, usually made of stainless steel.
Rotation axis: The container is supported and fixed by rotation axes at both ends.
Drive system: including motors, reducers, etc., providing power for the rotation of the container.
2、 Working process and mixing mechanism
Rotating motion:
During operation, the driving system drives the entire double cone container to rotate uniformly around its horizontal axis.
The materials inside the container are constantly lifted and rolled as the container rotates.
Composite motion of materials in containers (mixing mechanism):
Convective mixing: When the container rotates, the material located at the center of the container slides downwards under the action of gravity, while the material near the container wall is lifted upwards. This creates a huge circular flow inside the container, which is the dominant force of mixing.
Shear mixing: Due to the difference in internal movement speed of materials, slip and shear will occur between each other, thus penetrating and dividing each other, breaking the clumps of materials.
Diffusion mixing: In the sloping area where the material slides down, particles will scatter like a waterfall, and individual particles will move freely in a new spatial range to achieve further local uniform distribution.
Advantages of the "inverted cone" shape:
The double cone design is crucial. The conical structure has no dead corners, ensuring that all materials can participate in the cycle.
When the material slides down in the cone section, its flow cross-section constantly changes and its velocity varies, greatly enhancing the shear and diffusion mixing effect.