Electrostatic Filter Cleaning Mechanism for Flue Ducts
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Solution Overview
Problem
Existing electrostatic filters for flue ducts face issues with incomplete cleaning of particulate matter from the inner surfaces, noise during operation, and accumulation of debris on cleaning tools, leading to reduced filtration efficiency and increased maintenance needs.
Innovation Solution
An electrostatic filter with a cleaning system featuring a movable frame with ceramic or basalt fiber brushes that can rotate and translate to reach all surfaces, coupled with discharge holes designed to prevent brush damage and a motor-driven mechanism for thorough particulate removal, ensuring effective cleaning of the inner duct surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an auger with an integrated brush is used to remove particulate from the flue walls, then some particulate removal is achieved, but complete cleaning of the inner surface is not ensured and the auger itself accumulates particulate that cannot be cleaned
Solution Approach 1:
The invention extracts the cleaning function from the particulate removal system by introducing a separate cleaning device that is not integrated with the auger. This allows the cleaning mechanism to be independently optimized and maintained, solving the problem of the auger accumulating particulate that cannot be cleaned.
Solution Approach 2:
The invention introduces a cleaning device as an intermediary element between the auger and the flue walls. This cleaning device, with its specific brush configuration, mediates the cleaning process by reaching areas that the auger cannot access, ensuring complete particulate removal without compromising the auger's function.
2Reliability
If known brushes with metal bristles are used for cleaning, then some mechanical action is exerted on the flue walls, but not all encrustation can be removed and the cleaning is not thorough due to imprecise flue duct geometry
Solution Approach 1:
The invention applies local quality by using brushes with specific characteristics (flexible bristles, specific dimensions) that are adapted to the local conditions of the flue walls. The cleaning device is designed to accommodate geometric variations in different portions of the flue duct, ensuring effective cleaning across the entire surface despite imprecise geometry.
Solution Approach 2:
The cleaning device incorporates dynamic elements that allow it to adapt to the varying geometry of the flue duct. The flexible brush configuration enables the device to conform to irregular surfaces, maintaining effective mechanical action across all portions of the inner surface regardless of geometric imperfections.
3Reliability
If known cleaning solutions are used, then particulate removal is achieved, but the cleaning phase produces considerable noise that users do not appreciate
Solution Approach 1:
The invention replaces the noisy mechanical auger-based cleaning system with a quieter brush-based cleaning device. The brush mechanism achieves effective particulate removal through rotational motion and flexible bristle action, substituting the high-noise mechanical scraping action of the auger with a quieter, more user-friendly cleaning mechanism.
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 solution provides thorough cleaning of up to 90% of the inner duct surfaces, reduces noise, and minimizes reentering of particulate matter, extending maintenance intervals and ensuring efficient filtration performance.
Implementation Method 1
electrostatic filters comprising a charged high-voltage electrode that ionizes the air and consequently the fumes crossing the duct. The particulate suspended in the fumes is in turn electrostatically charged, with a generally negative but also positive charge, and attracted towards the inner metallic walls of the duct which are grounded
Implementation Method 2
a charged high-voltage electrode that ionizes the air and consequently the fumes crossing the duct
Implementation Method 3
an auger with an integrated brush that removes, by abrasion, the particulate that accumulates along the inner walls of the flue
Data Source
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AI summary
Electrostatic filter (4) for flue duct outlets from a combustion chamber, comprising a hollow manifold (8) having an inner side wall (12) delimiting a volume (16) for the passage and conveying of fumes, from an inlet end (20) of the fumes to an outlet end (24) of the fumes, said inlet end (20) and outlet end (24) being offset with respect to a vertical rising direction (Y-Y) of the fumes, said inner side wall (12) being lapped by said fumes, at least one electrode (28), housed at least partially in said volume (16) and/or in a side duct (32) fluidly connected to said volume (16), and configured so as to ionize the fumes crossing said volume (16) so as to adhere the particulate transported by the fumes to said inner side wall (12), and a cleaning device (44) configured so as to at least partially abrade said inner side wall (12) so as to remove the particulate attached thereto. The cleaning device (44) comprises at least one movable frame (48) within the volume (16), operatively connected to motor means (52), the frame (48) being provided with a plurality of brushes (56) configured so as to flap and clean said inner side wall (12), wherein said movable frame (48) comprises vertical sections (50), parallel to the vertical direction Y-Y, provided with said brushes (56).