Two-Stage Air Filter for Purging Acids and Solvents
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Solution Overview
Problem
Existing air filters are ineffective in purging both solvents and acids from the air, and the use of acid-purging additives with activated carbon granules reduces filter capacity and can release toxic materials.
Innovation Solution
A novel air filter with two stages: an acid-purging stage using an air-permeable skeleton with acid-neutralizing substances like sodium bicarbonate, and a solvent-purging stage with activated carbon granules, allowing for efficient neutralization and removal of both acids and solvents without toxic additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If acid-purging additives are added to activated carbon granules, then acid purging capability is improved, but filter capacity is reduced and toxic materials may be released
Solution Approach 1:
The invention divides the air filter into two separate stages: an acid-purging stage with acid-neutralizing substances and a solvent-purging stage with activated carbon granules. This segmentation allows each stage to perform its specific function optimally without the additives reducing the other's capacity, thereby resolving the contradiction between acid purging capability and filter capacity.
2Productivity
If a single-stage filter uses activated carbon granules, then solvent purging is effective, but acid purging is largely ineffective
Solution Approach 1:
The filter is segmented into two distinct stages: the first stage uses activated carbon granules for effective solvent purging, while the second stage introduces acid-neutralizing substances for acid purging. This segmentation maintains high solvent purging efficiency while adding the necessary acid purging capability.
Solution Approach 2:
The two-stage design creates a universal air filter system that can handle both solvents and acids effectively. Each stage is optimized for its specific purpose, but together they provide multi-functional capability to purge various types of unwanted substances from air.
3Adaptability or versatility
If acid-purging additives are used, then acid neutralization is achieved, but the additives reduce the effective surface area of activated carbon granules
Solution Approach 1:
By segmenting the filter into two separate stages, the acid-neutralizing substances are placed in the first stage while activated carbon granules remain in the second stage. This physical separation ensures that the acid-purging additives do not reduce the effective surface area of the activated carbon granules, as they are no longer mixed together.
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 two-stage air filter effectively purges both acids and solvents from the air with high efficiency, optimizing each stage for its specific purpose without reducing the other's capacity, and eliminating the need for toxic additives.
Implementation Method 1
an acid-purging stage which comprises an air-permeable skeleton having an acid-neutralizing substance mounted thereto
Implementation Method 2
the solvent-purging granules comprise activated carbon granules
Data Source
AI summary
Apparatus comprising:a fumehood; andan air treatment device for purging unwanted substances from the exhaust air of the fumehood, the air treatment device comprising:a non-thermal plasma reactor stage for producing air byproducts comprising O⋅, N⋅, OH⋅ and O3 and introducing those air byproducts into the exhaust air of the fumehood so as to treat the exhaust air of the fumehood; anda catalyst stage downstream of the non-thermal plasma reactor stage for further treating the air downstream of the non-thermal plasma reactor stage.