Fluidized Bed Dryer Swirl Vanes for Compact Particle Separation
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Solution Overview
Problem
Existing fluidized-bed evaporation dryers for bulk materials require significant investment and space due to complex structures and multiple components, limiting their efficiency and energy consumption for high drying performance.
Innovation Solution
The introduction of swirl vanes above vertical walls in the process chamber creates a rotating, homogeneous swirl flow that influences the fluidizing agent and material direction, eliminating the need for conical expansions and internal baffles, allowing for a more compact cylindrical design with reduced material usage and enhanced particle separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluidized-bed evaporation dryers are used with complex structures including conical expansions and internal baffles, then reliable particle separation and material transport are achieved, but investment volume and device complexity increase significantly
Solution Approach 1:
The invention extracts and eliminates the conical expansion section and internal baffles from the dryer structure, retaining only the essential cylindrical process chamber. The fluidized bed design and swirl vane system maintain particle separation efficiency without requiring these additional complex components.
Solution Approach 2:
Instead of using conical expansions to guide flow and separate particles, the invention uses swirl vanes in a cylindrical chamber to create rotational flow patterns that achieve separation. This inverts the conventional approach by using rotation rather than geometric expansion for flow control.
2Productivity
If conventional dryers with multiple components and conical expansions are implemented, then adequate drying performance is achieved, but investment volume and material usage increase
Solution Approach 1:
The invention merges the functions of conical expansion, flow guidance, and particle separation into a single cylindrical process chamber with swirl vanes. This consolidation eliminates the need for separate conical sections and multiple internal components, reducing overall volume while maintaining drying performance.
Solution Approach 2:
The cylindrical process chamber serves multiple functions simultaneously: it contains the fluidized bed, provides flow guidance through swirl vanes, enables particle separation, and facilitates material transport. This multi-functionality eliminates the need for dedicated separate components for each function.
3Speed
If complex internal structures with baffles and conical sections are used, then effective fluid flow control is achieved, but energy consumption increases
Solution Approach 1:
The invention replaces complex mechanical flow control structures (baffles, conical sections) with a streamlined swirl vane system that uses rotational flow dynamics. This reduces flow resistance and energy losses associated with multiple directional changes and flow separations in conventional designs.
4Reliability
If conventional designs with multiple components are used, then sufficient particle separation is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention removes unnecessary internal components such as baffles and conical sections, leaving a simple cylindrical chamber that is easier to manufacture. The essential particle separation function is maintained through the fluidized bed and swirl vane system alone.
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 design achieves higher drying performance with lower investment volume and energy consumption by optimizing fluid flow and particle movement, while maintaining efficient particle separation and material transport.
Implementation Method 1
swirl vanes (9), which are inclined or curved in the direction of flow from the entry cell to the discharge cell... the swirl vanes being surrounded by an outer shell (10). The fluidizing agent flows from below through the process space, exiting upwards between the swirl vanes into the transition area located above
Implementation Method 2
The swirl vanes are curved or inclined in such a way that a rotating, homogeneous flow of fluidizing medium, referred to as swirl flow, is generated in the free space arranged above them, preferably without flow-influencing installations. The centrifugal forces of this swirl flow move the entrained particles radially outwards
Implementation Method 3
fan device for supplying a fluidizing agent from below into the process space... devices for treating the fluidizing agent upstream of the fan device in the direction of flow... cells extending in the vertical direction being formed in the process space through vertically extending walls
Implementation Method 4
A conically widening transition area follows above the process space in order to reduce the flow velocity of the material entrained upwards and to widen the steam flow
Implementation Method 5
A cyclone is arranged in the uppermost part of the plant, which extends around the heat exchanger and has a closed bottom. The dust particles are discharged from the cyclone or connected to the discharge cell via a pipe
Implementation Method 6
a likewise cylindrical heat exchanger is arranged centrally... superheated steam as the fluidizing agent... used to flow superheated steam through and fluidize the bulk material or particulate materials from below
Data Source
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AI summary
The process involves fractionating a byproduct i.e. malt residuum, during a purification phase with high liquid proportion and thick phase, where the thick phase is formed by implementing a conditioning process into particles. The particles are dried in a fluidized-bed dryer (5) with a relative gap volume in the range of between 0.5 and 0.92 in a fluidized-bed layer. The purification phase is evaporated into a syrup that is supplied to the thick phase to form a mixed phase, and the dry particles are cooled in a cooling device (6). An independent claim is also included for an appliance for drying byproducts from the processing of starch-containing and sugar-containing raw materials after fermentation and distillation.