Bottom-Air Drying Chamber to Prevent Low-Density Material Bridging
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Solution Overview
Problem
Existing systems for drying materials with low bulk density, such as organic materials, face challenges with feeding and drying due to their light weight and tendency to form bridges, leading to uneven moisture distribution and inefficient drying.
Innovation Solution
A system with a dry air inlet at the bottom of a container, combined with an agitator arrangement and an air distribution arrangement that guides dry air around the edge of a plate to promote laminar flow and agitation, ensuring homogeneous drying and preventing moisture pockets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a drying chamber with internal obstructions (such as dry air pipes extending from top to bottom) is used, then drying function is provided, but material bridging is caused and material flow is blocked
Solution Approach 1:
The invention removes internal obstructions (dry air pipes extending into the chamber) from the drying system and replaces them with an external air distribution arrangement at the bottom of the container. This extraction of problematic internal components eliminates bridging while maintaining drying function through bottom-up air flow.
Solution Approach 2:
Instead of providing dry air from above through internal pipes as in prior art, the invention inverts the approach by introducing dry air from the bottom of the container. This inversion allows material to flow naturally from top to bottom while air flows from bottom to top, preventing bridging and improving both drying efficiency and material flow.
2Productivity
If organic particles with low bulk density are fed through the system, then material transport is attempted, but bridging occurs and passage is blocked
Solution Approach 1:
The invention inverts the conventional approach by positioning the air inlet at the bottom rather than the top. This inversion creates upward air flow that supports light organic particles, preventing them from bridging and blocking passages, thereby enabling continuous material transport.
Solution Approach 2:
The upward flow of dry air from the bottom acts as an anti-weight force, counteracting the gravitational settling of light organic particles. This prevents particles from catching on each other and forming bridges, maintaining material flow and productivity.
3Temperature
If conventional drying chambers are used for low bulk density materials, then drying is attempted, but moisture pockets form and drying is uneven
Solution Approach 1:
The invention inverts the drying approach by introducing dry air from the bottom upward, which naturally distributes moisture more uniformly through the material bed. This prevents localized moisture accumulation and achieves homogeneous drying, meeting the requirement for below 2% moisture content.
Solution Approach 2:
The air distribution arrangement segments the drying process into controlled zones through the plate structure, ensuring uniform air distribution across the material cross-section. This segmentation prevents moisture pockets and achieves consistent drying throughout the material volume.
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
The system achieves efficient and uniform drying of materials with low bulk density by preventing bridging and ensuring all material is exposed to dry air, facilitating continuous processing without clogging.
Implementation Method 1
dry air is arranged to flow from the dry air inlet and around an edge of the plate, to dry the material in the container
Implementation Method 2
dry air is arranged to flow from the dry air inlet and around an edge of the plate, to dry the material in the container
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A drying system (100) for drying a material, the drying system (100) comprising a container (200) for feeding material from a material inlet (210) at a top of the container (200) to a material outlet (220) at a bottom of the container (200), a dry air inlet (230) at the bottom of the container (200), an air distribution arrangement (400) comprising a plate (410) arranged above the dry air inlet (230), and an agitator arrangement (300), for agitating the material in the container (200), arranged above the plate (410), wherein dry air is arranged to flow from the dry air inlet (230) and around an edge of the plate (410), to dry the material in the container (200).