Hot Gas Filter Regeneration via Segmented Plenum Blowback
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Solution Overview
Problem
Hot gas filtration systems face challenges in regeneration due to contaminant bridge formation between filter elements, leading to increased manufacturing costs and reduced filtration capacity, as existing regeneration methods often require frequent cleaning and are inefficient.
Innovation Solution
The system divides filter elements into groups with separate plenum chambers and uses a blowback arrangement with large confined jet pulses, allowing for individual or group regeneration during operation, with adjustable cleaning intensities through varying blowback gas pressure, and incorporates safety fuses for enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a huge filter vessel with many filter elements is used to maintain high filtration capacity, then the filtration capacity is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The filter elements are divided into multiple groups, with each group connected to a separate plenum chamber. This segmentation allows the large filtration system to be managed in smaller, independent units that can be regenerated individually, reducing overall system complexity while maintaining high total filtration capacity.
Solution Approach 2:
Plenum chambers are pre-positioned at the clean gas ends of filter element groups to store cleaning gas. This preliminary preparation of cleaning gas in strategically located chambers enables rapid regeneration without requiring complex external gas distribution systems, thereby reducing device complexity.
2Reliability
If traditional regeneration methods are used, then the system can be regenerated, but contaminant bridge formation between filter elements occurs reducing regeneration effectiveness
Solution Approach 1:
By dividing filter elements into separate groups with dedicated plenum chambers, the invention prevents contaminant bridges from forming between adjacent filter elements. Each group is regenerated independently through its own plenum chamber, isolating the cleaning action to specific areas and eliminating the bridge formation problem that occurs in continuous filter arrays.
Solution Approach 2:
The plenum chambers act as intermediary spaces between the cleaning gas source and the filter elements. These chambers distribute cleaning gas uniformly across multiple filter elements in a group, preventing direct high-velocity gas jets from creating contaminant bridges between adjacent elements while still achieving effective regeneration.
3Productivity
If filter elements are cleaned frequently to maintain performance, then filtration capacity is maintained, but loss of time and productivity decrease
Solution Approach 1:
The segmentation of filter elements into groups with separate plenum chambers enables selective regeneration of only the contaminated groups while other groups continue filtering. This eliminates the need to shut down the entire system for cleaning, significantly reducing time loss while maintaining overall filtration capacity.
Solution Approach 2:
The system allows continuous filtration operation by enabling regeneration of individual filter element groups without stopping the entire system. Clean gas from the plenum chambers regenerates filter elements in-place during operation, maintaining continuous useful action of the filtration system while minimizing downtime.
4Reliability
If high cleaning intensity is applied to remove contaminants effectively, then regeneration effectiveness is improved, but the risk of filter element breakage increases
Solution Approach 1:
The plenum chambers distribute cleaning gas across multiple filter elements in a group, applying partial cleaning action to each element rather than excessive force to a single element. This distributed approach achieves effective contaminant removal while reducing the risk of any individual filter element experiencing breakage from overly intense cleaning.
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 cleaning intensity, flexibility in cleaning operations, and reduces manufacturing costs by allowing for efficient regeneration of filter elements while maintaining high filtration capacity and safety.
Implementation Method 1
a blowback gas pulse is generated by said blowback arrangement in a regeneration process
Data Source
AI summary
The present invention relates to a hot gas filtration system and a process for regenerating such a hot gas filtration system, said filtration system comprising a filter vessel, a tubesheet separating the interior of said filter vessel into a raw gas section and a clean gas section, and a plurality of filter elements. Said filter elements, arranged in two or more groups, are connected to the tubesheet with a clean end and extend with a raw gas portion into the raw gas section. Two or more plenum chambers are accommodated in the clean gas section and groupwise accommodate the clean gas ends of the filter elements, each of said plenum chambers comprising a gas exchange opening providing a direct fluid communication with the clean gas section. The hot gas filtration system furthermore comprises a blowback arrangement comprising a blowback gas reservoir and a blowback gas pipe for each group of filter elements, said blowback gas pipes having an outlet positioned in said clean gas section of the vessel, said outlet of the blowback gas pipes being directed at the gas exchange opening of the plenum chambers, said outlet of said blowback pipe having a free cross-sectional area of from about 10% to about 90% of the free cross-sectional area of said gas exchange opening.