Filter Device Fluidized Bed Aerosol Recovery Sticky Dust
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dry filtration devices struggle with sticky foreign bodies in exhaust air, such as tarry dusts and emissions from painting facilities, as they tend to clog filters and cannot be effectively cleaned using pressurized air, leading to rapid loss of filtration efficiency.
Innovation Solution
A filter device with a fluidized bed arrangement that suspends cleaned-off filtration aids and foreign matter as a filtration aerosol, allowing them to reattach to the filter surface and form agglomerates, which can be easily detached, and a system for continuous reuse of these materials to maintain filter efficiency without shutting down the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dry filtration is used to clean exhaust air, then the filtered-out foreign bodies can be easily processed, but sticky foreign bodies clog the filter pores and cannot be removed by conventional cleaning methods
Solution Approach 1:
Filtration aids are introduced as an intermediary substance that bonds with sticky foreign bodies to form agglomerates. These agglomerates have different adhesion properties than the original sticky foreign bodies, allowing them to be easily removed from the filter surface by conventional pressurized air cleaning methods while still effectively blocking contaminants
Solution Approach 2:
The invention changes the physical and chemical parameters of the filtration system by introducing filtration aids that modify the properties of foreign bodies. The filtration aids alter the adhesion characteristics, particle size distribution, and aggregation state of contaminants, transforming them from a state that causes clogging to a state that enables easy removal
2Ease of operation
If filtration aids are added to establish bonds with sticky foreign bodies, then agglomerates can be easily removed, but the filtration aids are lost and need continuous supply
Solution Approach 1:
The invention implements a recovery system where filtration aids removed from the filter surface along with foreign bodies are collected, separated, and returned to the filtration process. This closed-loop approach recovers the filtration aids for reuse, eliminating continuous supply requirements while maintaining the ease of agglomerate removal benefit
Solution Approach 2:
A feedback mechanism is established where the cleaned-off material containing filtration aids is monitored, processed, and fed back into the system. The filtration aids are recovered from the waste stream and returned to the raw gas stream or filter surface, creating a self-sustaining cycle that prevents substance loss
3Productivity
If the filter is cleaned periodically by pressurized air, then foreign bodies are removed, but sticky foreign bodies remain attached and clog the filter rapidly
Solution Approach 1:
Filtration aids are supplied in advance to the raw gas stream or filter surface before sticky foreign bodies can cause clogging. This preliminary action forms a protective layer of agglomerates on the filter surface that prevents direct adhesion of sticky foreign bodies, maintaining filtration efficiency between cleaning cycles
Solution Approach 2:
The filtration aids act as an intermediary layer between the filter surface and sticky foreign bodies. This intermediate layer modifies the interaction mechanism, preventing direct bonding of contaminants to the filter while allowing easy removal during cleaning, thus maintaining both productivity and reliability
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 approach enables efficient reuse of filtration aids, maintaining filter efficiency and preventing clogging, allowing for continuous operation and extended filter life by ensuring that filtration aids and foreign bodies form agglomerates that can be easily reattached to the filter surface, thus protecting it from sticky contaminants.
Implementation Method 1
a fluidized bed arrangement in which a carrier fluid stream can be generated such that cleaned-off filtration aids and/or foreign matter can be held at least in part as filtration aerosol in a surrounding of the filter unit
Implementation Method 2
held at least in part as filtration aerosol in a surrounding of the filter unit
Implementation Method 3
such sticky foreign bodies preferentially settle in the pores of the filter, gradually clogging the same. Due to their sticky nature, they tightly attach to the filter surface
Data Source
AI summary
A filter device is proposed for cleaning gas entraining foreign bodies, including at least one filter unit having at least one filter surface on a raw gas side to which a raw gas stream containing foreign bodies can be supplied, wherein filtration aids can be supplied to the raw gas stream and/or the filter surface, and wherein filtration aids and/or foreign matter attached to the filter surface can be cleaned off. The filter device additionally includes a fluidized bed arrangement in which a carrier fluid stream can be generated such that cleaned-off filtration aids and/or foreign matter can be held at least in part as filtration aerosol in a surrounding of the filter unit and/or can re-attach to a filter surface.