Annular Blade Group with Gradually-Varying Arc Curves for Demisting
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Solution Overview
Problem
Current demister devices in gas purification systems, such as those used in wet flue-gas treatment, suffer from low efficiency in separating fine particles at the nano-scale, leading to particle discharge and increased pressure loss, which affects the overall system performance.
Innovation Solution
A blade group for demisting and dedusting featuring a plurality of annularly arranged blades with a gradually-varied arc curve cross-section, combined with a supporting member that includes long and short blades, upper and lower blade layers, and a washing water distribution system, is designed to optimize gas flow distribution and resistance, enhance separation efficiency, and reduce pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional demister devices are used, then the structure is simple, but the separation efficiency for fine particles is low
Solution Approach 1:
The blade group is divided into multiple blades arranged in specific patterns (e.g., alternating long and short blades, or blades in multiple layers), where each blade contributes to the overall separation function. This segmentation allows the system to achieve high separation efficiency through cumulative effect while maintaining manageable structural complexity
Solution Approach 2:
The blades are designed with curved surfaces having specific radius of curvature, which optimizes the flow path and enhances the separation of fine particles from gas. The curved geometry improves aerodynamic performance and separation efficiency without significantly complicating the manufacturing process
2Manufacturing precision
If the blade group is designed to capture fine particles, then separation efficiency improves, but pressure loss increases
Solution Approach 1:
Different regions of the blade group have different blade configurations (e.g., varying blade lengths, spacing, or curvature radii) to optimize performance at different locations. This allows high separation efficiency in critical regions while minimizing pressure loss in other areas, achieving a balanced overall performance
Solution Approach 2:
The blade design incorporates dynamic flow considerations, where the blade geometry is optimized to adapt to varying flow conditions. The curved blade surfaces and strategic arrangement create dynamic flow patterns that enhance particle capture while reducing energy dissipation compared to static or straight-blade designs
3Device complexity
If uniform blade distribution is used, then the structure is simple, but gas flow distribution becomes non-uniform and pressure loss increases
Solution Approach 1:
The blade group employs asymmetric blade arrangements, such as alternating long and short blades, or different blade spacing in different angular positions. This asymmetric configuration creates more uniform gas flow distribution across the blade group, reducing localized high-velocity regions and minimizing overall pressure loss
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 blade group effectively captures fine mist droplets and dust particles by varying the inertia and drag force, improving separation efficiency and reducing pressure loss, while the washing system enhances cleaning effectiveness and water efficiency.
Implementation Method 1
The blade group effectively captures fine mist droplets and dust particles by varying the inertia and drag force
Implementation Method 2
The blade group effectively captures fine mist droplets and dust particles by varying the inertia and drag force
Data Source
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AI summary
The present invention provides a blade group for demisting and dedusting, comprising a plurality of blades that are annularly arranged and a support mechanism for fixing the blades; wherein the blade comprises a section of curved plate, a cross section of the curved plate being a gradually-varied arc curve whose curvature increases progressively along an airflow direction. When gas carrying fine mist droplets or fine dust particles are passing through the blade group for demisting and dedusting, since the gas is different from the mist droplets or dust particles in terms of mass, separation of the gas from the liquid or dust under the effect of inertia is promoted. Especially, the gradually-varied blade curve enables the droplets or dusts to be captured and removed efficiently under the effect of a constantly-varied inertia and a drag force, which remarkably improves the working efficiency in combination with a washing device.