Linear Filter Bag Cleaning System with Pressurized Air Venturis
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Solution Overview
Problem
Baghouse cleaning systems are complex, expensive, and inefficient, with circular arrangements underutilizing space and reducing air filtering capacity due to the accumulation of particulates on filter bag surfaces, which affects airflow and cleaning capacity.
Innovation Solution
A linear filter bag cleaning system with a cleaning arm that uses proximity sensors and pitot tubes to selectively clean filter bags based on air pressure, employing bursts of air to remove particulates and optimize energy usage, while maintaining a simpler design with reduced maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a circular cleaning system is used to clean filter bags, then the cleaning system can rotate around the center location to clean different subsections, but the system becomes complex and expensive with a complex series of tubes and valves
Solution Approach 1:
The circular cleaning system is segmented into multiple stationary cleaning zones arranged radially around the baghouse center. Each zone has its own air supply line with a valve, allowing independent control of each sector. This segmentation eliminates the need for a single complex rotating mechanism with extensive tubing, replacing it with simpler, localized cleaning stations that collectively provide comprehensive coverage.
Solution Approach 2:
The system employs periodic action by sequentially activating different cleaning zones in a rotating pattern. Instead of physically rotating components, the control system activates valves in sequence to direct pressurized air to different radial zones at different time intervals. This periodic activation simulates the effect of rotation while maintaining stationary, simpler infrastructure.
2Volume of moving object
If a circular arrangement of filter bags is used, then the baghouse can be compact, but the squared corner sections of the allocated space are underutilized and air filtering capacity is reduced
Solution Approach 1:
The patent transitions from a symmetric circular arrangement to an asymmetric configuration that adapts to the rectangular baghouse structure. Filter bags are arranged in radial rows extending from the center toward the walls, allowing the system to occupy the rectangular space more efficiently. This asymmetric layout eliminates wasted corner spaces while maintaining the rotational cleaning capability through the segmented zone approach.
Solution Approach 2:
The system utilizes the vertical dimension by arranging filter bags in multiple radial rows at different angular positions around the center. This three-dimensional arrangement maximizes the use of available vertical and radial space within the rectangular envelope, transforming the underutilized two-dimensional planar layout into an efficient volumetric configuration that increases filtering capacity.
3Reliability
If pressurized air is continuously blown into all filter bags, then cleaning is maintained, but energy consumption increases
Solution Approach 1:
The system applies local quality by directing pressurized air only to specific cleaning zones that require maintenance at any given time. Each radial zone is equipped with its own valve that can be independently controlled, allowing the system to concentrate cleaning energy where needed rather than continuously treating all filter bags uniformly. This localized approach maintains cleaning effectiveness while significantly reducing overall energy consumption.
Solution Approach 2:
The control system implements periodic action by cycling through different radial zones in sequence, activating pressurized air delivery to each zone for a predetermined duration before moving to the next zone. This periodic activation pattern ensures all filter bags receive regular cleaning attention while limiting energy consumption to discrete time intervals rather than continuous operation, optimizing the balance between cleaning reliability and energy efficiency.
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 system enhances cleaning efficiency by targeting dirty filter bags, reducing wear and energy consumption, and utilizing space more effectively, resulting in a more cost-efficient and capable air filtration system.
Implementation Method 1
A row of pitot tubes extend below the accumulator and determine if a row of filter bags needs to be cleaned based on air pressure
Implementation Method 2
A row of venturis are spaced apart to align over vertical centerlines for a row of filter bags. The venturis release bursts of air into the filter bags that reverse a direction of air flow through the row of filter bags
Data Source
AI summary
A baghouse cleaning system comprises an elongated air accumulator configured to retain pressurized air and extend over a row of filter bags. An elongated air tube extends along the air accumulator and venturis extend from the air tube. The venturis blow pressurized air streams down into the filter bags to remove particles attached to an outside filter bag surface. A valve fluidly couples the air accumulator to the air tube and an actuator is configured to move the cleaning arm linearly over different rows of the filter bags. A sensor may determine when the filter bags need to be cleaned based on a measured air pressure. A controller can actuate the cleaning arm to clean the filter bags based on preprogrammed cleaning patterns, the amount of measured air pressure, and/or other detected environmental conditions.