Flash Dryer Gas Deflection Design to Reduce Material Buildup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flash dryers face issues with material accumulation at the bottom of the chamber and air inlet, requiring costly maintenance and downtime due to complex tangential air inlets and externally located rotor drives, which are not heat-resistant.
Innovation Solution
A flash dryer design with a gas distribution element featuring an inclined gas deflecting surface and a centrally arranged gas inlet, combined with adjustable flaps, ensures efficient gas flow and reduces material accumulation, allowing for compact manufacturing and reduced maintenance downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If tangential air inlet is used in conventional flash dryers, then gas flow efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
Instead of using a complex tangential air inlet configuration, the patent inverts the approach by using a simple vertical air inlet combined with a gas distribution element that actively deflects the gas flow tangentially. This reverses the conventional design logic while achieving the same gas flow efficiency with reduced complexity
Solution Approach 2:
The gas distribution element acts as an intermediary component between the simple vertical air inlet and the drying chamber. It mediates the gas flow by deflecting it tangentially through its inclined surface, thereby achieving efficient gas circulation without requiring a complex tangential inlet structure
2Temperature
If externally located rotor drive is used, then heat resistance is improved, but material accumulation and maintenance downtime increase
Solution Approach 1:
The patent extracts the rotor drive from its conventional external location and relocates it internally within the drying chamber. This allows the drive to be positioned where it can directly engage the mill while being protected from heat, eliminating material accumulation zones and reducing maintenance requirements
Solution Approach 2:
The rotor drive is nested within the gas distribution element structure, with the drive shaft passing through the gas distribution element to reach the mill. This nested configuration consolidates multiple components into a compact arrangement that eliminates dead zones for material accumulation
3Reliability
If complex tangential air inlet and external rotor drive are used, then drying function is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple functions into the gas distribution element: it serves as both a gas distribution mechanism and a structural support for the rotor drive. This consolidation eliminates the need for separate complex tangential inlet structures and external drive assemblies, reducing manufacturing cost while maintaining drying reliability
Solution Approach 2:
The gas distribution element is designed as a multi-functional component that performs gas flow deflection, provides structural support for the drive mechanism, and creates the necessary tangential flow pattern. This universal component replaces multiple specialized parts, simplifying manufacturing
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 design enhances drying efficiency, reduces the risk of ignition and explosion, and minimizes downtime by preventing material buildup, making it suitable for hygienic food product drying with improved manufacturing simplicity.
Implementation Method 1
a lower side of the gas distribution element comprises a gas deflecting surface inclined relative to a horizontal plane such that the drying gas from the gas inlet is deflected by the gas deflecting surface towards the passage
Implementation Method 2
When the product to be dried is supplied to the chamber, the product is subjected to the hot air stream causing moisture in the wet product to be evaporated
Data Source
AI summary
A flash dryer for drying a product may include a chamber formed of a chamber wall. A product inlet may be provided for providing the product into the chamber. A gas inlet may be arranged below the product inlet for providing drying gas into the chamber. An outlet may be arranged above the product inlet. A gas distribution element may be arranged above the gas inlet. An outer edge of the gas distribution element may be distanced from the chamber wall such that a passage is formed between the gas distribution element and the chamber wall. A lower side of the gas distribution element may include a gas deflecting surface inclined relative to a horizontal plane such that the drying gas from the gas inlet is deflected by the gas deflecting surface towards the passage.