Pleated Stainless Steel Filter for Syngas Filtration
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Solution Overview
Problem
Current high temperature filters used in syngas gasification systems, such as ceramic and tri-sintered metal filters, are prone to cracking and cannot be easily cleaned or recycled, leading to increased industrial waste and processing downtime due to frequent replacements.
Innovation Solution
A stainless steel filter with a pleated metal mesh design, secured with high temperature metallic paste or adhesive, capable of withstanding up to 2000°F, and a self-cleaning system that includes a backflush unit for removing debris, allowing for continuous operation and easy recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ceramic filters are used for high temperature filtering, then filtering capability is maintained, but the filters crack and cannot be easily cleaned or recycled
Solution Approach 1:
The patent changes the material parameter from ceramic to stainless steel, which maintains high temperature resistance (capable of withstanding temperatures up to 2000°F) while dramatically improving cleanability. The stainless steel material allows for easy removal of filtered particles through mechanical cleaning methods, resolving the contradiction between temperature resistance and cleanability.
Solution Approach 2:
The patent employs a composite structure combining stainless steel mesh with a porous coating layer. The stainless steel provides structural integrity and temperature resistance, while the porous coating material (such as ceramic or sintered metal) provides filtering capability and facilitates particle removal. This composite approach maintains the benefits of ceramic filters while eliminating their cleaning difficulties.
2Temperature
If ceramic filters are used for high temperature filtering, then filtering capability is maintained, but the filters cannot be easily recycled
Solution Approach 1:
The patent changes the material composition from ceramic to stainless steel, which maintains the required high temperature resistance while dramatically improving recyclability. Stainless steel filters can be easily melted down and recycled into new filter elements or other steel products, eliminating the waste disposal problems associated with ceramic filters.
3Manufacturing precision
If tri-sintered metal filters are used, then filtering capability is maintained, but they cannot be easily cleaned to remove filtered particles
Solution Approach 1:
The patent uses a flexible stainless steel mesh structure that can be mechanically manipulated for cleaning. The mesh design allows particles to be removed through vibration, brushing, or air blasting without damaging the filter structure, whereas rigid sintered metal filters cannot withstand such cleaning methods.
Solution Approach 2:
The patent changes the structural parameter from a rigid sintered block to a flexible mesh configuration. This structural change maintains filtering precision while enabling easy removal of captured particles through mechanical means, resolving the contradiction between filtering precision and cleanability.
4Reliability
If filters are frequently replaced due to cleaning difficulties, then filtering performance is maintained, but processing downtime increases
Solution Approach 1:
The patent implements a self-cleaning filter design where the filter element can be easily cleaned in place or quickly removed and reused. The stainless steel mesh structure allows for rapid cleaning cycles, enabling the filter to serve itself by removing particles without requiring full replacement, thus maintaining continuous operation and minimizing downtime.
Solution Approach 2:
The patent incorporates preliminary cleaning capabilities that prevent particle buildup to problematic levels. By enabling frequent, easy cleaning cycles, the system prevents the need for urgent filter replacements, maintaining steady filtering performance and avoiding unplanned downtime.
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 stainless steel filter effectively filters submicron particles at high temperatures, reduces downtime through self-cleaning capabilities, and facilitates recycling, minimizing waste and maintaining system efficiency.
Implementation Method 1
A high temperature metallic paste or adhesive secures at least one end cap to at least one of the first end portion and the second end portion
Implementation Method 2
The filter can be formed from all stainless steel materials which can be easily cleaned and are readily recyclable into scrap material. The filter comprises a cylindrical member formed from a pleated metal mesh sheet
Implementation Method 3
a backflush unit located inline between the filter and the outlet for injecting or backflushing cleaning material back into the filter and removing collected debris from the filter
Data Source
AI summary
A high temperature filter and a self-cleaning filtering system for filtering media, such as biomass materials, are provided. The filter and filtering system is particularly useful in the filtration of syngas in a plasma arc gasification process to remove char and other particles of down to a submicron size from the syngas. The filter is formed from a pleated metal mesh material including end caps secured by a high-temperature metallic paste or adhesive, such that the filter is capable of withstanding operating temperatures up to 2000° F. The system includes a backflush unit for injecting cleaning media therein to remove trapped char and other debris from the filter. At least two filtering systems can be placed in parallel so that one system can be cleaned while the other is operating. A method for filtering media is also disclosed.