Tangential Slit Floor for Uniform Particulate Treatment
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Solution Overview
Problem
Existing devices for treating particulate materials, such as those used for drying, granulation, or coating, face challenges in achieving uniform treatment and preventing particle collision and uneven application of treatment media, leading to suboptimal results in terms of particle size distribution and layer thickness.
Innovation Solution
The slits in the process chamber are aligned tangentially to the circular break-up zone, causing particles to be deflected vertically and creating a rotary vortex, which enhances tumbling movements and reduces friction, allowing for more even and gentle treatment, including the use of annular gap nozzles for targeted media application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the slits are aligned radially to create opposing flows meeting in the break-up zone, then the process air can be deflected vertically upwards to create intensive mixing and turbulence, but the particles experience uncontrolled collisions and uneven treatment medium application
Solution Approach 1:
The patent applies asymmetry by aligning the slits tangentially rather than radially to the break-up zone. This asymmetric arrangement changes the flow pattern from radial opposing flows to tangential flows that create a rotational movement component, thereby reducing uncontrolled particle collisions while maintaining treatment uniformity
Solution Approach 2:
The patent utilizes curvature by aligning the slits tangentially to the circular break-up zone. This curved alignment creates a rotational flow pattern that gently moves particles in a controlled manner, reducing direct collisions and improving treatment uniformity compared to radial alignment
2Productivity
If the process air enters with high horizontal velocity to create intensive circulation, then treatment time is reduced and energy consumption decreases, but particles are sprayed unevenly and collide more frequently
Solution Approach 1:
The tangential alignment of slits creates an asymmetric flow pattern that introduces rotational movement. This rotational component allows particles to be moved through the treatment zone more evenly, preventing uneven spraying and maintaining layer thickness uniformity while preserving high treatment efficiency
3Object-affected harmful factors
If the slits are aligned tangentially to create rotational movement, then particle tumbling increases and friction decreases, but the flow pattern becomes more complex
Solution Approach 1:
The tangential alignment of slits to the circular break-up zone creates a naturally occurring rotational flow pattern. This curved geometric arrangement generates particle tumbling and reduces friction without requiring complex mechanical components, thereby reducing mechanical stress while keeping the device structure simple
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration results in improved coating homogeneity, larger pellet sizes, and spherical granulation, with reduced mechanical stress on particles, enabling more efficient and controlled treatment processes.
Implementation Method 1
Since the process air enters the process chamber through the floor with a horizontal movement component, a kind of air cushion is created on which the swirled good particles rest
Implementation Method 2
In the area of the ring-shaped break-up zone, a particularly intensive mixing and turbulence of the good particles takes place due to the deflected process air streams directed upwards
Implementation Method 3
The slits, viewed perpendicularly to the ground, are brought up approximately tangentially to the circular break-up zone. With this alignment of the air slots mentioned above, the particles guided radially towards the break-up zone are abruptly deflected vertically upwards
Implementation Method 4
The good particles of the radially outer area move in the direction of the radially outer wall of the process chamber and then, deflected by this, fall back to the ground due to gravity
Data Source
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AI summary
The invention relates to a device for treating particulate matter, comprising a process chamber for receiving and treating the matter, wherein a floor (10) of the process chamber comprises slits (14, 20) through which process air can be conducted into the process chamber having a horizontal displacement component, wherein the slits (14, 20) are aligned such that a first flow arises in a radially outer area (17), comprising a displacement component aligned from outside to inside, and that a second flow arises in a radially inner area (23) comprising a displacement component aligned from inside to outside, wherein the two opposite flows converge along a circular breakup zone (26). According to the invention, the slits (14, 20) approach the circular breakup zone (26) approximately tangentially, as seen perpendicular to the floor (10).