Fiber Bed Mist Eliminator With Gas-Impervious Veil Drainage
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Solution Overview
Problem
Conventional fiber bed mist eliminators have drawbacks such as increased overall length due to seal-leg drains, which can become loose and cause failures, and require pre-filling or post-filling with liquid, leading to inefficiencies and potential gas bypass.
Innovation Solution
A fiber bed assembly with a gas-impervious veil and a base structure that blocks gas flow, creating a gas-shielded drainage area, allowing for efficient aerosol collection and drainage without the need for a long seal-leg, using a fibrous packing material in the drainage passage for collected aerosols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal-leg drain is used to prevent gas bypass, then gas sealing is improved, but the overall length of the fiber bed assembly increases
Solution Approach 1:
The invention extracts and eliminates the seal-leg component from the traditional seal-leg cup assembly, replacing it with a self-contained gas-impervious veil structure that integrates directly with the fiber bed support. This removes the need for separate seal-leg drainage components while maintaining gas sealing functionality.
Solution Approach 2:
The gas-impervious veil is merged with the fiber bed support structure, combining the gas sealing function and the drainage function into a single integrated component. The veil is positioned to block gas flow while allowing liquid drainage, eliminating the need for separate seal-leg and seal-cup components.
2Productivity
If a seal-leg cup is used to collect and drain aerosols, then aerosol drainage is improved, but the device complexity increases
Solution Approach 1:
The invention removes the seal-leg cup component entirely, extracting the drainage function and integrating it directly into the fiber bed support structure. The gas-impervious veil serves as both the gas barrier and the drainage conduit, eliminating the need for separate cup and leg components.
Solution Approach 2:
The gas-impervious veil performs multiple functions simultaneously: it acts as a gas barrier to prevent bypass, provides a drainage path for collected aerosols, and supports the fiber bed structure. This multi-functionality eliminates the need for separate specialized components.
3Reliability
If the fiber bed assembly is made longer to include seal-leg, then gas sealing is improved, but the separation efficiency may be reduced
Solution Approach 1:
By removing the seal-leg component, the invention extracts the gas sealing function from the length extension and relocates it to a compact integrated structure. This eliminates the trade-off where increased length was required for sealing, allowing the fiber bed to maintain its optimal separation efficiency.
Solution Approach 2:
The gas sealing function is achieved not by extending the vertical length but by introducing a horizontal gas-impervious veil barrier. This dimensional change allows sealing to occur without increasing the overall assembly length, preserving the fiber bed's separation performance.
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 enhances separation efficiency while reducing the length of the fiber bed assembly, preventing gas bypass, and eliminating the need for a seal cup, thus improving operational reliability and efficiency.
Implementation Method 1
The veil is constructed to block flow of the gas stream into at least a portion of the fiber bed to provide a gas-shielded drainage area
Implementation Method 2
The fibers in the fiber bed capture the aerosol in the gas by the mechanisms of impaction, interception, and/or Brownian diffusion
Implementation Method 3
The fibers in the fiber bed capture the aerosol in the gas by the mechanisms of impaction, interception, and/or Brownian diffusion
Implementation Method 4
The fibers in the fiber bed capture the aerosol in the gas by the mechanisms of impaction, interception, and/or Brownian diffusion
Implementation Method 5
The moving gas urges the droplets to move toward the downstream face of the fiber bed as gravity pulls the captured liquid downward
Implementation Method 6
using a fibrous packing material in the drainage passage for collected aerosols
Implementation Method 7
using a fibrous packing material in the drainage passage for collected aerosols
Data Source
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AI summary
A fiber bed assembly for a fiber bed mist eliminator used to remove aerosols from a moving gas stream, the fiber bed assembly comprising: a fiber bed support having a wall defining an upstream space and a downstream space, the wall including openings therein to permit the gas stream to move generally freely through the wall from the upstream space to the downstream space; a fiber bed supported by the fiber bed support and generally blocking the wall openings so that the gas stream passes through the fiber bed moving from the upstream space to the downstream space, the fiber bed comprising collecting fiber media and having a top, a bottom, an upstream surface and a downstream surface; a base comprising a flange extending under the bottom of the fiber bed and a leg extending downwardly from the base, the leg having a passage therein for draining collected aerosols collected by the fiber bed assembly, the passage being packed with a fibrous packing material having a density greater than the density of the fiber bed.